Casing Accessories , completion tools, liner hanger system

PRIMARY CEMENTING
PRODUCT CATALOG

WELLCARE OIL TOOLS

WELLCARE OIL TOOLS PVT LTD
PRODUCT INDEX

PRODUCT TYPE Page No.
FLOAT
 Cement Float Collar (WC-CFC) ……………………………………………………………….. 1
 Cement Float Shoe (WC-CFS) ……………………………………………….……………… 1
 Cement Down jet Swirl Guide Shoe (WC-CDGS)………………………………………….. 1
 Cement Guide Shoe (WC-CGS)………………………………………………………………. 2
 Circulating differential Fill Up Collar (WC-CDFC)………………………………………… 2
 Circulating differential Fill Up Shoe (WC-CDFS)…………………………………………. 2
 Differential Fill Up Down Jet Swirl Shoe (WC-DFDS)………………………….………….. 2
 Cement Float Collar With Anti- Rotational Plugs (WC-CFC-AR)…………………………
3
 Duplex Cement Float Shoe (WC-DCFS)………………………………………………… 3
 Stab-In Float Shoe (WC-SIFS)……………………………………………………………….. 3
 Stab-In Float Collar (WC-SIFC)……………………………………………………………….. 4
 Auto fill Cement Float Shoe(WC-CFS-A)…………………………………………………. 4
 Auto Fill Cement Float Collar (WC-CFC-A)…………………………………………………… 6
 Cement Basket (WC-CBT)……………………………………………………………………….. 6
 Butt-Weld Cement Float Collar (WC-BCFC)……………………………………………… 7
 Butt-Weld Cement Float Shoe (WC-BCFS)………………………………..……………… 7
 Slip-On cement Float Collar (WC-SCFC)…….. …………………………………………….. 7
 Slip-On cement Float Shoe (WC-SCFS)…………………………………………..………….. 7
 Stage Cementing Collar (WC-SCCZ)……………………………………………..…………8
 Hydraulic Opening Stage Cementing Collar (WC-HSCC)………………………………… 9
 Three Stage Cementing Collar (WC-SCZW3)……………………………………………...9
 Stage Cementing Collar (WC-SCCX) ………………………………………………………. 10

PLUG
 Anti-Rotational Top Plug (WC-TP-AR)…………………………………………………………. 12
 Anti-Rotational Bottom Plug (WC-BP-AR) …………………..………………………………13
 Top Plug (WC-TP)………….…………………………………….……………………………. 13
 Bottom Plug (WC-BP)……………………………………………...…………………………. 13
 Top Plug Aluminum Core(WC-TP-AC) ………………………………………………………… 13
 Bottom Plug Aluminum Core (WC-BP-AC)…………………….…………………………. 13
 Latch down Wiper Plug (WC-WPLD)…………………………...…….……………………… 13
 Combination Cementing Plug (WC-PCC)…………………….……..……………………… 14
 Subsea Cementing Plug…………………………………………...………………………… 14
Top /Bottom Cementing Plug 15
Mechanical Stage Cementing Collar and Plug System
Two Stage three Plug System
Two Stage four Plug System
Continuous two stages Cementing
Three Stage cementing

I


PRODUCT TYPE
Page No.
 Tapered Nose (WC-NST) …………………………………………………..…………...….… 21
 Tapered Offset Nose (WC-NSOT) …………………………………..………………...….… 21
 Stage Collar (Hydraulic & Mechanical)(WC-SCMH)……………...………..…….…… 22
 Baffle Collar (WC-BCR)… ………………………………………………...…..……………. 24
 Baffle Plate(WC-BPE)………. …………………………………………………...………….. 24
 Thread Lock Compound …………………...………………………………….…….……… 24
 API Modified Pipe Compound …………………………………………………..………… 24
 Bow Spring Centralizer (WC-HNBSC/HWBSC/SWSRC)………………………….…….…. 29
 Semi-Rigid Bow Spring Centralizer (WC-BCSS)………..……………………………….…. 33
 Positive Bow Centralizer (WC-HNPBC/HWPBC/SWPBC)……………………………....… 35
 Bow Spring Turbolizer (WC-HNBST/HWBST/SWBST)………..………………………….…... 37
 Heavy Duty Weld Spiralizer/Centralizer (WC-HVS-L/HVS-R/HVC)…………..…………. 38
 Slip-ON Weld Spiralizer/Centralizer (WC-SWS-L/SWS-R/SWC)………………………….. 39
 Casted Spiralizer/ Centralizers ……………………………...……………………………...… 41
 Conductor Pipe Centralizers (WC-CRPC)………………………………………………..… 45
 Stop Collars ………………………………………………………………………………...…… 48
 Wire Bristle Scratcher (WC-SCWS)…………………………………………………...…..…... 49
 Wellbore Wipers (WC-SCWW) ………………………………………….…………………..... 49
 Cement Baskets (WC-HWB/SWB) …………………………………………….……….…….. 50

CEMENTING HEAD
 Cementing Head (WC-CTHD)……….…………………………………………… 51

II


Wellcare Oil Tools Pvt. Ltd. welcomes you to its state-of-art of designing
and manufacturing of Float Equipment & primary cementing products.
Wellcare has developed a complete line of float equipment and cementing
accessories those have been proven around the world to meet the demanding
requirements of our customers.

Wellcare’s products are designed, manufactured, tested and inspected
at its manufacturing facility. In-house test facilities allow Wellcare to test the
products as per Industry standards. Additional testing simulation also carried
out in an environment with extreme conditions.

At Wellcare the use of electronic design media and 3D modeling allows
for precise and quick designs to be produced so as to meet unique and timely
requirements for our customers.

Many of the Wellcare’s products have been designed to meet specific
customer requirements resulting in new or improved products for use under
difficult well conditions. As a result of such interactions unique products for
use in high operating temperatures, at high pumping rates, in different
standard fluids and highly deviated wells are now produced.

Wellcare utilizes current leading edge technologies in the manufacture
and inspection of all products. Computer controlled machining, computer
controlled heat treatment, and automated production equipment and
computerized inspection equipment ensure that the high standards demanded
by the petroleum industry are achieved. Traceability of products is complied
to the requirements of API Specification Q-1 and ISO 9001 quality programs.

Wellcare maintains accreditation with International Organization for
Standardization (ISO 9001:2008, ISO 14001:2004 & OHSAS 18001).

WELLCARE clientele across the world’s most demanding markets
is a testimony to its knowledge, understanding and efficiency.

III


FLOAT EQUIPMENT
CEMENT FLOAT COLLAR BENEFITS/FEATURES
(WC-CFC) (WC-30201)
CEMENT FLOAT SHOE • Fast drill-out
(WC-CFS) (WC-30101)
Cement/Poppet-type Float equipment offers • No metal parts-will not damage PDC bits.
dependable performance for all classes oil and
• Free-floating ball abrades evenly.
gas wells. The valves prevent cement backflow,
provide casing buoyancy during run in, and act • No springs.
as internal BOP's during the process of running
and cementing the casing. • Operator-controlled buoyancy-regulated by

Float equipment is manufactured to match filling casing at surface.
customer casing specification. All Poppet type
cement float collars are PDC drillable. • Cost effective.

CEMENT DOWN-JET SWIRL GUIDE
SHOE

(WC-CDGS) (WC-30301)

This Shoe is used to provide turbulent flow at
the shoe and where obstructions are expected
while running in, the Down-Jet Swirl ports allow
operator to ―wash‖ casing down.

Cement Float Collar Cement Float

CEMENT DOWN-JET SWIRL GUIDE SHOE

1

CEMENT GUIDE SHOE

(WC-CGS) (WC-30701)

This Cement Guide Shoe may be used in
combination with any type of collar. It
efficiently guides casing past sidewall
irregularities.

MODEL ―WC-CDFS‖
CIRCULATING DIFFERENTIAL
FILL- UP SHOE

CEMENT GUIDE SHOE

MODEL” WC-CDFC” CIRCULATING
DIFFERENTIAL FILL-UP COLLAR
(WC-30203)
MODEL” WC-CDFS” CIRCULATING
DIFFERENTIAL FILL-UP SHOE
(WC-30103)
MODEL” WC-DFDS”DIFFERENTIAL FILL-UP
DOWN JET SWIRL SHOE
(WC-30303)

MODEL ―WC-CDFC‖
CIRCULATING DIFFERENTIAL
FILL-UP COLLAR

MODEL ―WC-DFDS‖
DIFFERENTIAL FILL
UP DOWN JET SWIRL SHOE

2

Differential Fill-up Float Equipment allows 90 MODEL “WC-DCFS” DUPLEX CEMENT
per cent casing fill-up during run-in, reducing FLOAT SHOE (WC-30105)
surge pressures caused by the piston effect of
MODEL “WC-DCFC” DUPLEX CEMENT
running casing in restricted IDs. Use of FLOAT COLLAR(WC-30205)
Differential Collar with Shoe provides additional
buoyancy by allowing only 81 per cent casing Duplex Shoes and Collars sizes 7 5/8‖ to 30‖ are
fill-up further enhancing draw works efficiency. furnished with heavy duty duplex connection.
These heavy duty connections have 4‖ O.D. left
Circulation can be established at any time while hand threads and 3¼‖ I.D. seal bores, and are
running in. Dropping a ball converts the capable of carrying 100,000 lbs. with a
Differential Valve to a regular Back-Pressure
minimum safety factor 2. Special accessory
Valve. When Collar and Shoe are run together,
dropping one ball converts both units. products are available for use with this large
Duplex Equipment. The Tubing Seal Nipple has
CEMENT FLOAT COLLAR WITH ANTI- field proven Chevron Seals for positive sealing
ROTATIONAL PLUG of the nipple in the seal bore. It features an
(WC-CFC-AR) (WC-30204) expandable left hand latch mechanism, allow the
Cement/Poppet type float equipment offers nipple to be ―stabbed‖ into the duplex
dependable performance for all classes of oil and connection, and when up-strain is applied the
gas wells. The valves prevent cement back-flow latch is expanded to provide full engagement in
and provide casing buoyancy during run in . duplex assembly. The nipple is released by
rotating to the right unscrewing the latch
Float Collar is Non-Rotational type pressure and mechanism of the duplex connection. Left hand
Cementing Plug activated. Plugs feature the square thread subs with 4‖ O.D. left hand threads
latch-down type anti-rotational feature which is are also available for use with Large Duplex
compatible with the Float Collar and eliminates Equipment.
rotation during drilling.

Float Equipment is manufactured to match
customer casing specification. All Poppet type
Cement Float Collars are PDC drillable.

CEMENT FLOAT COLLAR
WITH ANTI-ROTATIONAL
PLUG (WC-CFC-AR)

MODEL ―WC-DCFS‖ MODEL ―WC-DCFC‖
DUPLEX DUPLEX
CEMENT FLOAT SHOE CEMENT FLOAT COLLAR

3

Model “WC-SIFS” Stab-In Float Shoe FEATURES: -
(WC-30106)
1. Small diameter inner string off drill pipe is
Model “WC-SIFC” Stab-In Float Collar used to displace cement which minimizes
(WC-30206) displacement volume behind cement and there
by reduces contamination and save time.
Model “WC-SISS” Stab-In Seal Sub
(WC-30306) 2. Drill out of cement inside large casing is
Stab-In cementing is an improved method for minimized by controlling cement top with
cementing large diameter casing. Conventional displacement fluid in drill pipe and Poppet valve
methods require excessive amounts of cement to in Stab in Shoe.
ensure cement circulation to surface because of ADVANTAGES
open hole volume, losses to the formation, or
mud displacement efficiency that cannot be • Improve displacement accuracy — cement
determined with sufficient accuracy. In addition, mixing and pumping continues until cement
large plugs must be used to separate the cement returns reach surface.
from the mud and have to be drilled out, along
with any cement in the casing. With stab-in • Get better cement quality — the reduced
cementing, the Drill Pipe is stabbed directly into cement/mud interface area and high velocity of
the Float Shoe or Collar and cement is pumped flow in the Drill Pipe minimize cement
through the drill pipe until returns reach surface. contamination while the short pumping time
Cement is then displaced to the bottom of the eliminates the need for cement retarders.
Drill Pipe — a wiper dart can be used. The drill
• Reduce cement volume — conventional
pipe is then picked up, circulated, and pulled out
displacement requires calculation of excess
of the hole.
cement factor, whereas with stab-in methods
excess cement need be no greater than the
volume of the drill pipe. No large plugs are
needed.

• Reduce net rig time — circulating, pumping,
and drill-out times are minimized.
USE: -
• Protect casing — cementing pressures are
The WELLCARE Stab In Float Equipments are confined to the drill pipe as in a squeeze job.
used for cementing large diameter casings
lowered on drill pipe. The string presents special ORDERING EXAMPLE :
cementing consideration due to high PRODUCT NO.WC-30106
displacement volume of large diameter casing. SIZE : 13 /8 MODEL ―WC-SIFC‖ STAB-IN
Problem with high displacement are overcome FLOAT SHOE W/13 /8‖ OD Buttress Box for
68 Ib/ft Casing.
by using Stab in Cementing Equipment to allow
PRODUCT NO WC-30306.
cementing through drill pipe. SIZE: 4 /2‖ STAB-IN SEAL SUB w/4 /2‖ I.F.
Box up.

4


Stab-In Float Collar

Stab-In Seal Sub

Stab-In Float Shoe

5

AUTO FILL CEMENT FLOAT SHOE AUTO FILL CEMENT FLOAT COLLAR
MODEL: WC-CFS-A (WC-30107) MODEL:WC-CFC-A (WC-30207)

The Auto Fill Cement Float Shoe permits the The Auto Fill Cement Float Collar permits the
casing to fill automatically while being run into casing to fill automatically while being run into
the hole. The valve is in the open position while the hole. The valve is always in the open
running in allowing maximum filling of the position allowing maximum filling of the casing
casing as it is lowered into the well bore. as it is lowered into the well bore.

This is especially effective on liner jobs and This is especially effective on liner jobs and
sensitive whole conditions. sensitive hole conditions.

The circulation may be established at any time The circulation may be established at any time
during or after casing is run. The flapper type during or after casing is run. The flapper type
back pressure valve does not become operative back pressure valve does not become operative
until the drop ball is dropped or pumped down. until the drop ball is dropped or pumped down.
From this point on like Differential Fill-up Shoe, Like Differential Fill-up Equipment, the Collar
this model Auto Fill Cement Float Shoe acts as is activated by the same ball.
conventional Floating Equipment. All Auto fill
From this point on, like Differential Fill-up
Cement Float Shoes are PDC drillable.
Collar, this Auto Fill Cement Float Collar acts
as conventional Floating Equipment. All Auto
Fill Cement Float Collars are PDC drillable.

AUTO FILL CEMENT FLOAT SHOE
AUTO FILL CEMENT FLOAT COLLAR
MODEL: WC-CFS-A (WC-30107)
MODEL : WC-CFC-A (WC-30207)

6

CEMENT BASKET Float equipment is manufactured to match
MODEL : WC-CBT (WC-31101) customer casing specification. All ball type
cement float collars are PDC drillable. Butt-
The Cementing Basket is designed to run on the
Weld Casing Collar O.D. matches with the
casing string or liner to support a cement column
casing O.D. and upper end is only beveled, not
to prevent contamination of a lower zone or to
recessed for directly welding to the Casing pipe.
keep hydrostatic head of a column from breaking
down a weak formation.

The Basket consists of flexible steel springs that
support overlapping rubber liners. The Basket is
placed on the casing with movement limited by
pipe couplings or by welding the ring of the
basket directly to the casing. Stop rings may also
be used to selectively space the Baskets between
Collars without welding.

BUTT-WELD
CEMENT FLOAT COLLAR
MODEL: WC-BCFC
(WC-30208)

BUTT-WELD CEMENT FLOAT COLLAR
MODEL: WC-BCFC (WC-30208)
BUTT-WELD CEMENT FLOAT SHOE BUTT-WELD
CEMENT FLOAT SHOE
MODEL: WC-BCFS (WC-30108) MODEL: WC-BCFS
Cement/Poppet-type Float equipment offers (WC-30108)
provide casing buoyancy during run in, and act
as internal BOPs during the process of running
and cementing the casing.

7

SLIP-ON CEMENT FLOAT COLLAR
MODEL: WC-SCFC (WC-30209)
SLIP-ON CEMENT FLOAT SHOE
MODEL: WC-SCFS (WC-30109)
Cement/Poppet-type Float equipment offers
provide casing buoyancy during run in, and act
as internal BOPs during the process of running
and cementing the casing.

Float equipment is manufactured to match
customer casing specification. All poppet type
SLIP-ON CEMENT
cement float collars are PDC drillable. Slip-ON
Casing Collar O.D. matches with the casing FLOAT SHOE
O.D. and upper end is only beveled, not recessed MODEL: WC-SCFS
for directly welding to the Casing pipe. (WC-30109)

SLIP-ON CEMENT
FLOAT COLLAR
MODEL: WC-SCFC
(WC-30209)

8

MODEL: WC-SCCZ STAGE CEMENTING OPERATION
COLLAR (WC-30210)
The operation of the Stage Collar requires only
The Model WC-SCCZ Stage Cementing Collar the Plugs that come with the Collar and the
is used to cement casing in two or more stages manipulation of casing pressure. A rubber seal-
and allows operators great flexibility in off plate is also provided to place in the top Float
controlling flow theology, cement chemistry, Collar only when the plug bumping surface is
and down hole hydrostatic pressures. Typically, flat. The nose of the Model ―WC-DFFP‖
the Model ―WC-SCCZ‖ Stage Collar is used Flexible Wiper Plug is tapered to guide it
where a single stage cement job would result in through the stage collar and needs a beveled
breakdown of a weak formation causing cement surface on which to seat and seal.
losses and or contamination of the producing
zone. The Model ―WC-SCCZ‖ Stage Collar covers
casing sizes 4½ in. through 9-5/8 in. Threads and
HYDRAULIC OPENING STAGE materials specifications vary to meet operators
CEMENTING COLLAR casing program.
MODEL: WC-HSCC (WC-30211)
FEATURES
This Stage-collar features an opening sleeve with
area differences on opposite ends that allow it to •Strong one-piece body construction.
be manipulated hydraulically. The hydraulic-
opening feature makes this tool’s use very •Protected closing sleeve.
practical in horizontal well. •Inner sleeves locked against rotation.

•Full, smooth bore after drill out.

BENEFITS

•No internal threaded or welded pieces to leak or
fail

•Nothing to snag Packers or Running Tools run
subsequently.

•Easily drilled out-sleeves and plugs are rubber
and aluminum.

•Simple hydraulic operation.

•Shut-off sleeve cannot be accidentally
reopened.
Model: WC-HSCC Model: WC-SCCZ
Hydraulic Opening Two Stage Cementing
Stage Cementing Collar Collar (WC-30210)
(WC-30211)

9

THREE STAGE CEMENTING COLLAR
MODEL: WC-SCZW3 (WC-30212)

Three Stage Cementing is used to place a long
column of cement about a weak zone. The ―WC-
SCZW3‖ Stage Collar is located a short distance
about the weak zone. The First Stage is
cemented by pumping cement up to the ―WC-
SCZW3‖ Collar. The ―WC-SCZW3‖ Collar is
then opened using the Trip Plug and then the
Second and Third Stages are cemented.

Model: WC-SCZW3
Model : WC-SCZW2
Three stage Cement Collar
Two stage Cement Collar
(WC -30212)
(WC-30216)

10


11

MODEL: WC-SCCX STAGE CEMENTING
COLLAR (WC-30213)

The Model WC-SCCX Stage Cementing Collar
covers sizes larger than 9-5/8 inch.

It offers operators all of the benefits of the
Model ―WC-SCCZ‖ Stage Collar (sizes 9-5/8 in.
and smaller), and also features an outer closing
sleeve which cannot be accidentally reopened.
Non-API threads require the use of special
casing sub.

ORDERING EXAMPLE :
PRODUCT NO. WC-30213
SIZE : 13 /8‖ MODEL WC-SCCX STAGE
CEMENTING COLLAR W/13 /8‖ OD 8 RD
STC Box x Pin f/13 /8‖ OD 68-77 lb/ft S-95
Casing, complete with TRIP PLUG, SHUT- Model WC-SCCX
OFF PLUG, INDICATING TYPE PLUG Stage Cementing Collar
(WC-30213)

12


PLUG
Anti-Rotation Top Plug
Anti-Rotation Bottom Plug
Anti-Rotation
Top Cementing Plug and Bottom Cementing Top Plug
Plug have been designed to decrease drill out Model:WC-TPAR
time. This series of cementing plugs uses (WC-30501)
reinforced locking teeth built into the
plugs, which lock together between the plugs
and the float equipment to eliminate rotation
of the plugs during drill out. The body of the
plugs is manufactured using a plastic core which Anti-Rotation
eliminates aluminium and large mass of rubber Bottom Plug
found in conventional cementing plugs. No Model: WC-BPAR
metal parts are used and the plugs are completely (WC-30601)
P.D.C. (polycrystalline diamond compact)
drillable.

Top Plug
Bottom Plug
Top Cementing Plug and Bottom Cementing
Top Plug
Plug are designed to replace conventional
Model: WC-TP
cementing plug systems. By replacing the
(WC-30502)
aluminium and rubber core material in
conventional plugs with a large crushable plastic
core most of the rubber is eliminated, allowing
the drill bit to fracture the plastic rather than tear
the rubber and aluminium thus significantly Bottom Plug
reducing drill out times. These plugs are Model: WC-BP
completely P.D.C. drillable. (WC-30602)

Top Plug Aluminium Core
Bottom Plug Aluminium Core

Top Plug Aluminium Core and Bottom Plug
Aluminium Core are manufactured with an
aluminium insert and are rubber coated. The Top Plug Al Core
plugs are available in 4 1⁄2" / 114mm to 20" / Model: WC-TP-AC
208mm, The top plug is manufactured in black (WC-30503)
natural rubber and the bottom plug in orange
with rupture diaphragm at 300 psi differential.
Operating range is up to 200 degrees Fahrenheit
/ 93 degrees Celsius. Plugs can be ordered in
Viton allowing for higher operating temperatures Bottom Plug Al Core
and are operational in either synthetic or mud Model: WC-BP-AC
fluids. (WC-30603)

13

Latch Down Wiper Plug
Model : WC-WPLD (WC-30801)

Latch down Wiper Plug and Receiver Plate is
an effective method of providing a positive
sealing check valve in combination with a
displacement plug. The receiver plate is Top Flexible
designed to screw into a short 8 round threaded Combination Plug
casing coupling and receive the latch-in plug Model : WC-PCC-1
after displacement has been completed. The (WC-30802)
receiver plate features a unique check valve to
allow for trapped fluid which normally causes a
hydraulic lock to be dispersed during the latch-in
procedure. The plug and receiver plate are
manufactured from drillable materials. Receiver
plates can also be ordered for buttress threaded
casing collars. is available in casing sizes 41⁄2"
/ 114.3mm through 13 3⁄8" / 339.7mm and
tubing sizes 2 3⁄8" / 60.3mm through 41⁄2" /
114.3mm.

Latch down Wiper Plug Top Plug
Model : WC-WPLD (WC-30801) Model: WC-PCC-2
(WC-30803)
Receiver Plate
Model: WC-RPE (WC-31002)

COMBINATION CEMENTING PLUGS

Top and bottom cementing plugs are
manufactured for use in combination casing
Combination Top Plug
strings where two or more different casing or
Model: WC-PCC-3
tubing strings must be wiped by the cementing
(WC-30804)
plugs during the displacement of fluids. Plugs
for sizes from 2 3⁄8" / 60.3mm through 13 3⁄8" /
339.7mm are available. Illustrations of some of
the styles of plugs are shown.

14

SUBSEA CEMENTING PLUG SYSTEM casing grades, casing weights and thread
connections.
Top Cementing Plug
Bottom Cementing Plug Mechanical Stage Cementing Collar And
Sub-sea cementing plug system has been Plug Systems
designed for use where the casing is being Stage Collar is a proven design that is
installed utilizing a sub-sea wellhead tie-back Manufactured in sizes 4 1⁄2" / 114.3mm through
system. Additional applications for this system 20" / 508mm. Design of the tool incorporates
include use with liners or where sectional two internal sleeves that are shifted down to
cementing of the casing is being performed. open and close the cementing ports. The opening
Operation of the sub-sea cementing plug system and closing seats that catch the plugs feature a
is achieved by installing the top and bottom wide seating area to ensure excellent seating
plugs on Running Tool that is attached to the with the opening bomb and closing plug. Seats
bottom of the drill pipe string using common are short in length reducing drill out time.
running tools or the Wellcare Running Tool Double locking mechanisms are used on the
that incorporates a swivel allowing the drill pipe closing sleeve that locks the sleeve in position
to be rotated above the tool while allowing the both during the closing movement and after it
plugs to remain stationary inside the casing. has been fully closed. The closing procedure
Bottom Plug is released by dropping Launch incorporates a system for allowing trapped fluid
Ball into the drill pipe and circulating into the between the sleeves to be dissipated and permits
bottom plug where circulation pressure causes the closing sleeve to fully lock in the down
the bottom plug to be released. To release Top position.
Plug the Launching Dart is released on top of
the cement and pumped down through the drill Two Stage Three Plug Cementing
string until it engages and releases the top plug
from the running tool. The standard two stage cementing procedure
Wellcare offers three types of stage cementing uses conventional floating equipment, either
collars. Stage Collar is a mechanical stage standard valve or filling float valves on the
collar that relies on gravity and an opening bomb bottom of the casing string. The rubber baffle
or opening plug to open the cementing ports in plate is installed on top of the float collar. The
the collar. Stage Collar and 242 Packer stage collar is installed in the casing string at the
Cementing Collar are hydraulic stage collars that position where second stage cement is to be
use internal casing pressure to open cementing pumped into the annulus. If a casing packer is
ports. The use of Wellcare Stage Collars will being used the stage collar will be located above
allow for reduced contamination of cement the packer. The operation of the stage collar is
where a long column of cement is being placed; illustrated in sequence.
reducing the breakdown of weak formations due 1: Running In and First Stage Cementing,
to a long column of cement; allow for effective Flexible First Stage Plug will pass through stage
cement placement around lost circulation zones; collar while displacing first stage cement,
and, to selectively place cement over certain landing on Baffle Plate located in
casing intervals. Plug systems for different Float Collar.
applications are available to allow the stage 2: Second Stage Cement Opening Trip Bomb
collars to be used in a wide range of applications has landed in and opened Stage Cementing
where stage cementing is required. All stage Collar allowing second stage cement to be
collars are designed with built in locks that lock displaced.
sleeves in the required positions during running, 3: Second Stage Cement complete, Second Stage
cementing and after completion of the cementing Closing / Displacement Plug landed in Stage
operation. All materials within drift diameters Collar. Application of pressure will close the
are made from easily drillable material allowing Stage Collar Ports. Two Stage Cementing job is
for quick and easy drill out of the plugs and complete.
seats. Stage collars are available in different
15

Two Stage Four Plug Cementing
The two stage four plug cementing procedure is
used where a lead plug is required to be run prior
to first stage cement. Where there is no
requirement for applying pressure to the casing
after first stage cement displacement, a Type
Flexible By-pass Plug is run in front of first
stage cement. First stage cement is then run as
usual with the Flexible First Stage Plug
pumped on top of the cement. Upon completion
of displacement no pressure indication will be
obtained. Second stage cementing is performed
in the manner described under Two Stage Three
Plug Cementing. Where it is required to obtain a
pressure indication upon displacement of first
stage cement as may be the case when a casing Model : WC-ZSTP Model :WC-ZWFP
packer is being run a Landing Collar should be Stage Collar Trip Flexible By-Pass
run above the float collar. The landing collar will Plug (WC-30904) Plug (WC-30902)
allow Type Flexible By-Pass plug to be
pumped through the landing collar to the float
collar. On
Landing the plug in the float collar the cement is
Displaced, by-passing the flexible plug.
Flexible Shut-Off Plug is used instead of Plug
to displace first stage cement. This plug will land
in the landing collar allowing for an indication
that the plug has been displaced. Pressure inside
the casing can now be increased to inflate a
casing packer and test the casing.

Model :WC-DFFP Model : WC-ZSCP
Landing Collar Stage Collar Closing
Flexible Follow Plug
Model : WC-LDC (WC-30903) Plug (WC-30901)

(WC-31501)

16


Two Stage Four Plug Cementing

Wellcare
Casing Wellcare
Centralizer Model : Wellcare
WC-ZSCP Model :
Stage Collar
WC-ZSCP
Opening Trip
Wellcare Stage Collar
Plug
Model : Closing Plug
WC-SCCZ
Stage
Cementing
Collar

Wellcare
Metal
Petal
Basket

Wellcare
Model :
WC-DFFP
Flexible
Follow Plug

Wellcare
Landing
Collar
Model:
WC-LDC

Wellcare
Model :ZWFP
By-Pass
Plug

Wellcare
Cement
Wash-Down
Whirl Float
Shoe

Displacing First-Stage First-Stage Cement Displacing Second-Stage Stage Collar
Cement Displaced and Trip Cement and Pumping Closed
Plug Dropping Down Closing Plug

17

Continuous Two Stage Cementing

Continuous two stage cementing is employed
where there is a requirement to begin circulation
of the second stage immediately after first stage
cement has been displaced or where inclination
of the stage collar is such that the standard
opening bomb will not properly gravitate to the
opening seat in the stage collar. The latter
situation is often encountered in horizontal and
highly deviated wells for two stage cementing.
The procedure for performing continuous stage
cementing requires a Flexible By-Pass Plug
used in front of the First stage cement. First
stage cement is then pumped into the casing Model : WC-ZSCP
followed by Flexible First Stage Plug. Stage Collar Trip Plug
Displacement fluid required to fill the casing
between the float collar and the stage collar is
then pumped, Continuous Opening Plug is
released and displacement is continued. Plugs
are then displaced with opening plug arriving
at the stage collar just before 2 Opening Plug
lands in the float collar. Application of pressure
will open the stage collar and circulation of the
second stage can be performed. Pumping of
second stage cement and closing of the stage
collar is accomplished using Closing Plug.

Model :WC-ZWFP
Flexible Indicating
Seal-OFF Plug

Model : WC-ZSCP
Stage Collar Closing Nipple

18


Wellcare
Casing Model :
Centralizer WC-ZSCP Model :
Stage Collar WC-ZSCP
Trip Plug Stage Collar
Closing Plug
Model :
WC-SCCZ
Stage
Cementing
Collar

Wellcare
Metal
petal
Basket

Wellcare Model :
Rubber WC-DFFP
Seal-Off Flexible
Plate Indicating
Wellcare Seal-OFF
Cement Plug
Float
Collar

Wellcare
Cement
Wash-Down
Whirler Float
Shoe

Conditioning Well First –Stage Displacing Stage Collar
Cement Displaced and Second-Stage Cement and Closed
Trip-Plug Dropping Pumping Down Stage
Collar Closing Plug

19


Three Stage Cementing

Three stage cementing can be performed using with a special first stage plug, opening bomb and
Stage Collars. The installation of Reduction closing plug that are designed to be pumped
valve seats in the lower stage collar and a set of through the upper stage collar and work
Three Stage Cementing Plugs permits three stage effectively in operating the lower stage
cementing to be performed. The Plug set comes cementing collar. Plug set is also supplied with
reduction valve seats required to convert a
standard Stage Collar for use with the plugs.
Three Stage Cementing

20

Tapered and Offset Tapered Noses Features
MODEL: WC-NST (WC-31201) • Enables a one trip to bottom target depth casing
MODEL: WC-NSOT (WC-31202) run
Tapered and offset tapered noses help casing • With the high-port up-jet (HPUJ) or down-jet
pass severe ledges, obstructions, high angles, nose, cement bonding can be improved to jet
and previous sidetracks. These noses also help wellbore clean, and to aid in circulating past
protect the float valves from being damaged tight spots.
from debris while running in the hole. • Available on all Super Seal II® equipment
• Available in aluminium (non-PDC drillable)
and composite material (PDC drillable
• Available in standard design, HPUJ, and down-
jet configurations
• ―Enclosed‖ down-jet option is available with
moulded plastic nose, which passes 60% of flow
through the nose and 40% through the down-jet
ports.

Tapered Offset Nose

Tapered Offset Nose for Better Travel in Deviated hole Section
21

STAGE COLLAR
(Mechanical and Hydraulic)
MODEL : WC-SCMH (WC-31301)

Features
1. The circulation ports can be hydraulically
opened, eliminating the need to use a free-
fall opening plug Therefore, it is not
restricted to well inclination.
2. Internal closing structure and anti-rotation
mechanism protect the closing sleeve from
damage while drilling out the opening and
closing seats.
3. All internal parts are made of easily
drillable material.
4. Opening pressure adjustable upon
customer request.

Hydraulic and Mechanical Stage Collar
MODEL : WC-SCMH (WC-31301)

22


Specifications
Casing Size Casing Weight Max O.D. Drill-out I.D. Overall Length

in. kg/m l b/ft mm in. mm in. mm in.

25,30 17.00 124 4.882

5 /2 29.76 20.00 172 6.772 121 4.764 780 30.709

34.23 23.00 119 4.685

38 69 26.00 159 6 260

7 43.16 29.00 210 8.268 157 6.181 930 36.614

47.62 32.00 155 6.102

44.20 29.70 175 6.890

7-5/8 50.15 33.70 230 9.055 172 6.772 1120 44.094

58 04 39.00 168 6.614

59.53 40.00 224 8.819

9-5/8 64.74 43.50 282.5 11.122 222 8.740 1170 46 063

69.94 47.00 221 8 701

75.90 51.00 250 9.843

10 /4 82.59 55.50 302 11.890 248 9.764 1210 47.992

90.33 60.70 245 9.646

23

Baffle Collar Thread Lock Compound (WC-31402)
MODEL: WC-BCR (WC-31401)
Thread Lock Compound is a thread compound
Baffle Collar is an effective method for landing formulated for locking of casing threads. This
cementing plugs at specific points in compound is used for locking float equipment
the casing string. Useful in situations such as and casing joints on the bottom of the casing to
liner cementing and where no float collar or float prevent unscrewing of the threads during drill-
shoe is being run. Cement filled collar that is out operations. The two part compound provides
easily drillable superior strength and works in adverse
temperature conditions.

Baffle Plate API Modified Pipe Compound
MODEL: WC-BPE (WC-31001) (WC-31403)
API modified pipe compound is a thread
Baffle Plate is used for landing cementing plugs lubricant, protecting and sealant that is
and is designed to be installed in the centre of a manufactured according to the specifications of
casing coupling. These units are available in API Bulletin 5A2. The compound contains rust
both aluminium and plastic materials, and come and oxidation inhibitors and is formulated to
in threaded and flush outside diameter ensure brush ability over a wide temperature
configurations. Baffle Plates are available in range. The pipe compound will seal and
sizes 4 1⁄2" / 114.3mm through 13 3⁄8" / withstand pressures up to 10,000 PSI / 69 Mpa
339.7mm. and will not harden and dry. Available in 9 and
15 kilogram pails.

24

WELLCARE Centralizer Software Program
Cementing products installation design should be based on individual well conditions
and operating objectives. WELLCARE Centralizer Software program provides
optimum deployment (minimum strategic deployment for maximum output) of
cementation products in the well.
The Program works with actual well data, including well profiles and pipe data to
calculate down hole forces. It then analyses actual
WELLCARE Centralizer performance data to
determine where to place specific equipment so that
a minimum stando ff is maintained throughout the
string.
The Program is sophisticated enough to devise a
complete equipment installation design by taking
pay zone area or other specialized areas into
account. While WELLCARE Centralizers give perfect
bore performance, the Centralizer Software Program
confirms it before application.

25


Types Of
CENTRALIZERS

Non Weld Welded Casted
Centralizer Centralizer Centralizer

N/W Bow Spring Hinge Welded Slip On Aluminum
Centralizer Centr. welded Centr. Centr. &
Spirlr.

S/O Bow Steel Centr.
N/W Semi Rigid H/W Bow
Bow Spring Spring & Spirlr.
Spring Centr.
entralizer Centralizer

Zinc Centr.
N/W Positive H/W Semi S/O Semi Rigid
& Spirlr.
Bow Centralizer Rigid Bow Bow Spring
Spring Cet. Centr.

H/W Positive S/O Positive
Bow centr. Bow
Centralizer

S/O Heavy
Duty
Spiralizer

S/O welded
Spiralizer

26


PERFORMANCE OF BOW SPRING Readings of force used form the time the
CENTRALIZER centralizer is inside the outer pipe until
the inner pipe is completely in place
being recorded and the maximum force
Starting Force
reported as the running force after
compensation.
Maximum force required to insert a
centralizer into a specified wellbore
diameter.

1. A fully assembled centralizer is
installed over four equally spaced lugs
(3 on t h e inner pipe-1) as shown in Fig-1.

2. The test assembly is held within 5
degrees of the vertical with the centralizer
resting on the edge of the outer pipe-2

3. Load is applied on the inner pipe to pull
the centralizer into the outer pipe-2.

4. Starting force equals the maximum
force required to put centralizer inside
t he out er pipe-2.

5. The starting force should be less than
the weight of 40ft. (12.2mtrs.) of
medium weight casing.

Running Force
Maximum force required to move a
centralizer through a specified wellbore
diameter.
The running force represent the
maximum force required to slide the
inner pipe inside the outer pipe once the
force reading has become steady after
compensating for the weight of the inner
pipe end attachment.
The running force test may be perform
with the starting force test or carried out
separately.
27

Restoring Force Test Field experience shows that stand-off
values of 75-90% are adequate even in
Restoring force is the force exerted by a horizontal wells.
centralizer against the casing to keep it
away from the bore wall.
1. The test is performed with pipe-1 and
pipe-2 (Fig. 2) within 5 degrees of the
horizontal.
2. External force is applied to the outer
pipe-2 which is transferred to the
centralizer.
3. Load is then applied and load v/s
deflection readings are recorded for 3
times when the minimum restoring force
has been obtained.
4. Each b o w spring is tested and the
final load deflection curve is prepared
using the arithmetic average of the
force readings at corresponding
deflections.
5. Restoring force is determined from this
curve at 67% stand-off ratio.

28

Hinged Non Weld Bow s p r i n g pipe movement before the cement sets
Centralizers in, the centralizers are able
MODEL : WC-HNBSC (WC-40301) to minimize gas channeling.
Hinged Weld Bow s p r i n g The centralizers provide a semi
Centralizers rigid casing standoff.
MODEL : WC-HWBSC (WC-40302) Non weld design features self locking
Slip ON Weld Bow s p r i n g of lips for holding bows to end collars.
Centralizers Bows of special alloy steel are hot
MODEL : WC-SWBSC (WC-40303)
formed and tempered for optimum
WELLCARE non weld bow centralizers
strength, resilience and uniformity.
are high quality, developed to exceed
They are then flattened as per
API 10 D specifications for use in the
specifications for consistent
most demanding conditions.
performance.
The non weld bow centralizers
High restoring force combined with
combine the highest non weld
low starting force is achieved with all 5
centralizer restoring force with the
bow heights. Their installation on the
lowest starting force.
casing pipe is very convenient. It
Premium quality bows made of
requires only the placement of the two
special alloy steel with uniform
assembled halves on the pipe and
hardness provide optimum
inserting the pin in the end collar hinge.
performance. The bows with
The centralizer when unassembled
extended profile prevent them from
makes a compact package, greatly
hitting against casing collars. The bows
reducing shipping cost. Assembly at
are available in a range to
site is conveniently done,
accommodate any well profile.
Quality steel and non weld design
ensure extra strong grip while integral
hinges folded on the inside are
connected by high strength locking pin
for maximum structural robustness.
WELLCARE non weld bow
centralizers are used to position the
casing in the centre of the wellbore in
vertically deviated as well as horizontal
wells.
The non weld bow centralizers reduce
the effect of channeling by improving
cement flow. This results in a more
uniform thickness between the casing
a n d the wellbore. By reducing the

29


30

Table “A” - HINGED NON-WELD BOW SPRING CENTRALIZERS [WC-HNBSC]
Sl.No Casing Size Hole Size No.of Bow MAX. OD MAX. Comp. OD
6" 4 7.165” 5.409”
6-1/4" 4 7.165” 5.409”
1 4-1/2"
6-1/2" 4 7.638” 5.409”
7-7/8" 4 9.055” 5.409”
6-1/2" 4 7.677” 5.921”
6-3/4" 4 7.677” 5.921”
2 5"
7-7/8" 4 9.094” 5.921”
8-1/2" 4 10.118” 5.921”
7-7/8" 4 9.134” 6.433”
8-1/2" 4 10.079” 6.433”
3 5-1/2"
8-3/4" 4 10.079” 6.433”
9-7/8" 4 11.102” 6.433”
4 6-5/8" 8-1/2" 4 9.331” 7.575”
8-1/2" 4 9.724” 7.969”
5 7" 8-3/4" 4 10.197” 7.969”
9-7/8" 4 11.614” 7.969”
6 7-5/8" 9-7/8" 4 10.846” 8.598”
10-5/8" 6 11.831” 9.583”
7 8-5/8" 11-5/8" 6 13.799” 9.583”
12-1/4" 6 14.272” 9.583”
11-5/8" 6 13.819” 10.626”
8 9-5/8" 12-1/4" 6 14.291” 10.626”
13-3/4" 6 15.315” 10.626”
11-5/8" 6 13.602” 10.882”
9 9-7/8" 12-1/4" 6 14.075” 10.882”
13-3/4" 6 15.098” 10.882”
12-1/4" 6 13.583” 11.807”
10 10-3/4" 13-3/4" 6 15.472” 11.807”
14-3/4" 6 16.024” 11.807”
13-3/4" 8 15.492” 12.772”
11 11-3/4" 14-3/4" 8 16.437” 12.772”
15-1/2" 8 17.461” 12.772”
16" 8 18.642” 14.425”
12 13-3/8"
17-1/2" 8 19.114” 14.425”
16" 8 18.366” 14.681”
13 13-5/8"
17-1/2" 8 18.917” 14.681”
16" 8 18.740” 15.055”
14 14"
17-1/2" 8 19.291” 15.055”
20" 10 21.791” 17.083”
15 16"
22" 10 24.075” 17.083”
22" 10 23.425” 19.740”
16 18-5/8"
24" 10 26.732” 19.740”
24" 10 25.827” 21.118”
17 20"
26" 10 28.110” 21.118”

31

Table “B” – WELD BOW SPRING CENTRALIZERS [WC-HWBSC/WC-SWBSC]
Sl.No. Casing Size Hole Size No.of Bow O.D MAX. COMP.OD
6" 4 7-1/8" 5.25”
6-1/4" 4 7-1/8" 5.25”
1 4-1/2"
6-1/2" 4 7-5/8" 5.25”
7-7/8" 4 9-1/8" 5.25”
6-1/2" 4 7-5/8" 5.76”
6-3/4" 4 7-7/8" 5.76”
2 5"
7-7/8" 4 9-1/8" 5.76”
8-1/2" 4 10-1/8" 5.76”
7-7/8" 4 9-1/8" 6.28”
8-1/2" 4 10-1/4" 6.28”
3 5-1/2"
8-3/4" 4 10-1/4" 6.28”
9-7/8" 4 11-1/4" 6.28”
4 6-5/8" 8-1/2" 4 9-5/8" 7.42”
8-1/2" 4 9-5/8" 7.81”
5 7" 8-3/4" 4 10-1/8" 7.81”
9-7/8" 4 11-5/8" 7.81”
6 7-5/8" 9-7/8" 4 10-3/4" 8.44”
10-5/8" 6 11-3/4" 9.43”
7 8-5/8" 11-5/8" 6 13-7/8" 9.43”
12-1/4" 6 14-1/4" 9.43”
11-5/8" 6 13-7/8" 10.47”
8 9-5/8" 12-1/4" 6 14-1/4" 10.47”
13-3/4" 6 15-3/4" 10.47”
11-5/8" 6 13-5/8" 10.72”
9 9-7/8" 12-1/4" 6 14-1/4" 10.72”
13-3/4" 6 15-1/4" 10.72”
12-1/4" 6 13-3/8" 11.65”
10 10-3/4" 13-3/4" 6 15-5/8" 11.65”
14-3/4" 6 16-1/8" 11.65”
13-3/4" 8 15-3/8" 12.61”
11 11-3/4" 14-3/4" 8 16-3/8" 12.61”
15-1/2" 8 17-3/8" 12.61”
16" 8 18-5/8" 14.27”
12 13-3/8"
17-1/2" 8 19-1/8" 14.27”
16" 8 18-5/8" 14.52”
13 13-5/8"
17-1/2" 8 19-1/8" 14.52”
16" 8 18-5/8" 14.90”
14 14"
17-1/2" 8 19-1/8" 14.90”
20" 10 21-5/8" 16.93”
15 16"
22" 10 24-1/8" 16.93”
22" 10 23-1/4" 19.58”
16 18-5/8"
24" 10 26-3/4" 19.58”
24" 10 25-5/8" 20.96”
17 20"
26" 10 21-1/8" 20.96”

32

HINGED SEMI- RIGID NON-WELD
BOW SPRING CENRALIZER
MODEL : WC-HNSRC (WC-40401)
HINGED SEMI- RIGID WELD BOW
SPRING CENRALIZER
MODEL : WC-HWSRC (WC-40402)
SLIP ON SEMI RIGID NON WELD
BOW SPRING CENRALIZER
MODEL : WC-SWSRC (WC-40403)

Available in the size range 4 ½ ‖ to
20‖, this device ensures high efficiency
in casing jobs on deviated and
horizontal wells. Combining the
features of a standard spring bow
and rigid centralizer, it has bows
manufactured from alloy steel
tempered for exact hardness and a
non- weld design to eliminate brittle
spots. The spring characteristics of its
double crested profile permit
compression to facilitate movement
through tight spot.

33

Table “C” - SEMI RIGID BOW SPRING CENTRALIZERS [WC-HNSRC/WC-HWSRC/WC-SWSRC]
Sl.No. Casing Size Hole Size No.of Bow Max. O.D Max. Comp.O.D
6" 4 6-1/8" 5.41”
6-1/4" 4 6-3/8" 5.41”
1 4-1/2"
6-1/2" 4 6-5/8" 5.41”
7-7/8" 4 8" 5.41”
6-1/2" 4 6-5/8" 5.92”
6-3/4" 4 6-7/8" 5.92”
2 5"
7-7/8" 4 8" 5.92”
8-1/2" 4 8-5/8" 5.92”
7-7/8" 4 8" 6.43”
8-1/2" 4 8-5/8" 6.43”
3 5-1/2"
8-3/4" 4 8-7/8" 6.43”
9-7/8" 4 10" 6.43”
4 6-5/8" 8-1/2" 4 8-5/8" 7.57”
8-1/2" 4 8-5/8" 7.97”
5 7" 8-3/4" 4 8-7/8" 7.97”
9-7/8" 4 10" 7.97”
6 7-5/8" 9-7/8" 4 10" 8.60”
10-5/8" 6 10-3/4" 9.58”
7 8-5/8" 11-5/8" 6 11-3/4" 9.58”
12-1/4" 6 12-3/8" 9.58”
11-5/8" 6 11-3/4" 10.63”
8 9-5/8" 12-1/4" 6 12-3/8" 10.63”
13-3/4" 6 14" 10.63”
11-5/8" 6 12" 10.88”
9 9-7/8" 12-1/4" 6 12-3/4" 10.88”
13-3/4" 6 14-1/4" 10.88”
12-1/4" 6 12-3/4" 11.81”
10 10-3/4" 13-3/4" 6 14-1/4" 11.81”
14-3/4" 6 15-1/4" 11.81”
13-3/4" 8 14-1/4" 12.77”
11 11-3/4" 14-3/4" 8 15-1/4" 12.77”
15-1/2" 8 16" 12.77”
16" 8 16-1/2" 14.43”
12 13-3/8"
17-1/2" 8 18" 14.43”
16" 8 16-1/2" 14.68”
13 13-5/8"
17-1/2" 8 18" 14.68”
16" 8 16-1/2" 15.06”
14 14"
17-1/2" 8 18" 15.06”
20" 10 20-1/2" 17.08”
15 16"
22" 10 22-1/2" 17.08”
22" 10 22-1/2" 19.74”
16 18-5/8"
24" 10 24-1/2" 19.74”
24" 10 24-1/2" 21.12”
17 20"
26" 10 26-1/2" 21.12”

34

HINGED NON WELD POSITIVE BOW
CENTRALIZER
MODEL: WC-HNPBC (WC-40201)
HINGED WELD POSITIVE BOW
CENTRALIZER
MODEL: WC-HWPBC (WC-40202)
SLIP-ON WELD POSITIVE BOW
CENTRALIZER
MODEL: WC-SWPBC (WC-40203)

WELLCARE non weld positive
centralizers are uniquely designed with
flat bottom U profile of different depths.
The flat U profile is fitted in self locking
retaining lips for firm and positive hold.
The centralizers significantly reduce
frictional drag while being used in
deviated holes. They provide almost 100%
standoff when run inside a cased
hole. They are supplied 1/4‖/6mm less
than the inside diameter of the casing or
hole size in which the centralizer is to be
run.
The non weld design eliminates brittle
spots, enhancing durability. WELLCARE
non weld positive centralizers are
available in a size range of 4 ½ ‖ to 20‖.
Available in the size range 4 ½ ‖ to 20‖,
these centralizers are uniquely designed
with flat bottom U profile of different
depths permitting maximum fluid
passage.
Available with straight bows for
c a s i n g operations, this device provides
nearly 100% stand-off (Concentricity)
when run inside a case hole. The
self locking design ensures firm hold. Its
non-welded structure, eliminates brittle
spots and enhances durability.

35

Table “D”-POSITIVE BOW CENTRALIZERS [WC-HNPBC/HWPBC/SWPBC]
Sl. No. CASING SIZE HOLE SIZE No. Of Bows CENTRALIZER OD
6-1/8" 4 5.787”
1 4-1/2"
8-1/2" 4 8.071”
8-1/2" 4 8.268”
2 5"
5-7/8" 4 5.512”
8-1/2" 4 8.228”
3 5-1/2"
9-5/8" 4 9.094”
8-1/2" 4 8.228”
4 6-5/8"
9-5/8" 4 9.370”
8-1/2" 4 8.189”
5 7"
9-5/8" 4 9.213”
9-5/8" 4 9.291”
6 7-5/8"
8-1/2" 4 8.150”
9-5/8" 4 9.252”
7 8-5/8"
12-1/4" 4 12.008”
12-1/4" 6 11.870”
8 9-5/8"
13-3/8" 6 13.012”
12-1/4" 6 11.909”
9 9-7/8"
13-3/8" 6 12.736”
12-1/4" 8 12.008”
10 10-3/4"
13-3/8" 8 13.031”
12-1/4" 8 11.890”
11 11-3/4" 13-3/8" 8 13.012”
13-1/2" 8 12.028”
16" 8 15.669”
12 13-3/8"
17-1/2" 8 17.126”
16" 8 15.689”
13 13-5/8"
17-1/2" 8 17.067”
16" 8 15.768”
14 14"
17-1/2" 8 16.909”
18-1/2" 8 18.327”
15 16"
20" 8 19.783”
22" 10 21.585”
16 18-5/8" 24" 10 4.646”
26" 10 21.585”
22" 10 20.364”
17 20" 24" 10 23.514”
26" 10 25.719”

36

HI TURBOLIZER

HINGED NON WELD BOW
SPRING TURBOLIZER
MODEL : WC-HNBST (WC-40501)
HINGED WELD BOW SPRING
TURBOLIZER
MODEL : WC-HWBST (WC-40502)
SLIP ON WELD BOW SPRING
TURBOLIZER
MODEL : WC-SWBST (WC-40503)

Available in the size range 4 1/2 ‖ to
20‖, this sturdy non-weld device
induces a spiral flow pattern in the
slurry thereby increasing displacement
efficiency. Fitted with s p e c i a l l y
designed multi-direction turbo fins
made of alloy steel in annealed state
this device improves the cleaning action
of drilling fluids, distributes the cement
slurry into wellbore irregularities and
minimizes channeling.
For Specification refer to Table ―A‖ & ―B‖

37

HEAVY DUTY WELD
SPIRALIZER -L
MODEL : WC-HVS-L (WC-40701)
HEAVY DUTY WELD
SPIRALIZER -R
MODEL : WC-HVS-R (WC-40702)
HEAVY DUTY WELD
CENTRALIZER
MODEL : WC-HVC (WC-40703)

WELLCARE Heavy Duty Weld
Centralizers are high quality w e l d e d
product which m e e t or exceed API
10D specifications. The centralizers
h a v e bow springs strongly welded to
the end collars under r e q u i r e d
temperature conditions wi t h correct
grade electrode.
Integral hinges folded on the inside
stay intact even under extreme stress.
The end collars are available in latch-on
design with high strength steel l ocki n g
p i n for maximum structural toughness.
With a choice of six different bow
heights the r i g h t c o m b i n a t i o n for
casing open hole c o n figuration c a n be
achieved.

WELLCARE Spiralizer, is designed
specifically for h i g h l y d e v i a t e d or
horizontal wells. The steel construction
ensures extra strength and superior
toughness The design of the blades
provide minimum friction reducing drag
forces while running in the pipe. The
Spiralizers are available in spiral and
straight blades which resist high side
loads. While giving maximum standoff
the blades create vortex flow to optimize
mud displacement. The centralizers are
available in 4½ ‖ to 13 3/8‖.
For Specification refer to Table ―E‖

SLIP-ON WELD SPIRALIZER-L
38

SLIP-ON WELD SPIRALIZER-L
Model : WC-SWS-L (WC-40801)
SLIP-ON WELD SPIRALIZER-R
Model : WC-SWS-R (WC-40802)
SLIP-ON WELD CENTRALIZER
Model : WC-SWC (WC-40803)

WELLCARE Slip –ON Weld Spiralizer are
high quality w e l d e d product which
meet or exceed API 10D
specifications. The centralizers h a v e
bow springs strongly welded to the end
collars under r e q u i r e d temperature
conditions wi t h correct grade electrode.
Integral hinges folded on the inside
stay intact even under extreme stress.
The end collars are available in latch-on
design with high strength steel locking
pin for maximum structural toughness.
With a choice of six different bow
heights the right combination for casing
open hole c o n figuration c a n be
achieved.

WELLCARE Slip-on Weld Centralizer, is
designed specifically for h i g h l y d e v i a t
e d o r horizontal wells. The steel
construction ensures extra strength and
superior toughness The design of the
blades provide minimum friction reducing
drag forces while running in the pipe. The
Spiralizers are available in spiral and
straight blades which resist high side
loads. While giving maximum standoff
the blades create vortex flow to optimize
mud displacement. The centralizers are
available in 4½ ‖ to 13 3/8‖.

39

Table “E” - SLIP ON WELDED BOW SPRING CENTRALIZERS
Sl.No. Casing Size Hole Size No.of Bow O.D MAX. COMP. OD
6" 4 7-1/8" 5.41
6-1/4" 4 7-1/8" 5.41
1 4-1/2"
6-1/2" 4 7-5/8" 5.41
7-7/8" 4 9-1/8" 5.41
6-1/2" 4 7-5/8" 5.92
6-3/4" 4 7-7/8" 5.92
2 5"
7-7/8" 4 9-1/8" 5.92
8-1/2" 4 10-1/8" 5.92
7-7/8" 4 9-1/8" 6.43
8-1/2" 4 10-1/4" 6.43
3 5-1/2"
8-3/4" 4 10-1/4" 6.43
9-7/8" 4 11-1/4" 6.43
4 6-5/8" 8-1/2" 4 9-5/8" 7.57
8-1/2" 4 9-5/8" 7.97
5 7" 8-3/4" 4 10-1/8" 7.97
9-7/8" 4 11-5/8" 7.97
6 7-5/8" 9-7/8" 4 10-3/4" 8.60
10-5/8" 6 11-3/4" 9.58
7 8-5/8" 11-5/8" 6 13-7/8" 9.58
12-1/4" 6 14-1/4" 9.58
11-5/8" 6 13-7/8" 10.63
8 9-5/8" 12-1/4" 6 14-1/4" 10.63
13-3/4" 6 15-3/4" 10.63
11-5/8" 6 13-5/8" 10.88
9 9-7/8" 12-1/4" 6 14-1/4" 10.88
13-3/4" 6 15-1/4" 10.88
12-1/4" 6 13-3/8" 11.81
10 10-3/4" 13-3/4" 6 15-5/8" 11.81
14-3/4" 6 16-1/8" 11.81
13-3/4" 8 15-3/8" 12.77
11 11-3/4" 14-3/4" 8 16-3/8" 12.77
15-1/2" 8 17-3/8" 12.77
16" 8 18-5/8" 14.43
12 13-3/8"
17-1/2" 8 19-1/8" 14.43
16" 8 18-5/8" 14.68
13 13-5/8"
17-1/2" 8 19-1/8" 14.68
16" 8 18-5/8" 15.06
14 14"
17-1/2" 8 19-1/8" 15.06
20" 10 21-5/8" 17.08
15 16"
22" 10 24-1/8" 17.08
22" 10 23-1/4" 19.74
16 18-5/8"
24" 10 26-3/4" 19.74
24" 10 25-5/8" 21.12
17 20"
26" 10 21-1/8" 21.12

40

CASTED STEEL SPIRALIZER-L that no balling between the vanes
Model: WC-CSP-SL (WC-40104) takes place, as scraping, gouging or
CASTED STEEL SPIRALIZER-R digging into the formation is eliminated.
Model: WC-CSP-SR (WC-40108)
CASTED STEEL CENTRALIZER Spiral Blade Solid Centralizers
Model: WC-CST-S (WC-40103)
CASTED ALUMINIUM SPIRALIZER-L
WELLCARE Spiral Blade Solid
Model: WC-CSP-AL (WC-40102)
CASTED ALUMINIUM SPIRALIZER-R Centralizers were developed in
Model: WC-CSP-AR (WC-40107) response to the need for better
CASTED ALUMINIUM CENTRALIZER cementing in highly deviated and
Model: WC-CSTS-A (WC-40101) horizontal wells. WELLCARE Spiral
CASTED ZINC SPIRALIZER-L Blade Solid Centralizers are designed to
Model: WC-CSP-ZL (WC-40106) provide optimum flow area. The 360
CASTED ZINC SPIRALIZER-R degrees over lapping solid vane
Model: WC-CSP-ZR (WC-40109) provide maximum wall contact
CASTED ZINC CENTRALIZER and fluid swirl. Reduced flow area
Model: WC-CST-Z (WC-40105) between the spiral blades produces a
vortex motion of the fluids f more fluid
or
WELLCARE manufactures straight and
velocity with direction. WELLCARE
spiral blade solid centralizers. The solid
Spiral blade Solid centralizer is made of
centralizers are made of one piece high
high strength corrosion resistant cast
grade corrosion resistant aluminum cast
aluminum and also non-sparking zinc
and non sparking metal-zinc alloy. They 0
alloy. The 30 slope of the vane end
are high impact and shock resistant,
reduce drag and aids the casing in
possess high tensile and yield strengths
reaching TD. This gentle flow from the
and are wellhead friendly.
body to the height of the vane will
WELLCARE straight blade solid eliminate scraping, gouging or digging
centralizers provide maximum into the formation and consequently
casing/wellbore standoff, the reduce balling between the vanes.
prime requisite of an excellent primary WELLCARE Spiral Blade Solid
cement job. This is irrespective of lateral Centralizer has high impact and shock
loads. The straight blades are self resistance combined with tensile and
cleaning in nature and designed to yield strength as well as resists corrosion.
enhance flow.
Straight blade solid centralizers can
endure steep temperatures in the
wellbore. Friction factor is minimal,
with reduced drag and torque, ensuring
maximum fluid passage.
WELLCARE spiral blade solid
centralizers provide the utmost wall
contact and fluid swirl. They give
optimum flow area in highly deviated and
horizontal wells. The casing effectively
reaches TD due to the sloping rare ends
reducing drag. The slope also ensures
41


42

Straight Blade Solid Centralizer
WELLCARE straight blade solid
centralizers provide the right features for
getting a good primary cementing job
with maximum casing/ wellbore stando ff.
WELLCARE straight blade solid
centralizers are constructed of one piece
high strength corrosion resistant
cast aluminum and also non- sparking
zinc alloy. WELLCARE straight blade
solid centralizers provide ultimate drag
and torque reduction with maximum
fluid bypass. With low friction
factor WELLCARE straight blade solid
centralizers withstand high wellbore
temperatures while providing maxi.
horizontal standoff.
WELLCARE centralizers are wellhead
friendly and have high impact with
shock resistance, along with optimum
tensile and yield strength.

43

Table “F”- SOLID CASTED SPIRALIZER/CENTRALIZER
Sl.No. Casing Size Hole Size No.of Bow I.D O.D
4-1/8” 4 2.969 3-49/64”
1 2-7/8”
6,6-1/8” 4 2.969 5-41/64”
2 3-1/2” 6-1/8” 4 3.594 5-41/64”
3 4” 6-1/8” 4 4-3/32” 5-41/64”
6" 4 4.606 5-3/4"
6-1/4" 4 4.606 6"
4 4-1/2"
6-1/2" 4 4.606 6-1/4"
7-7/8" 4 4.606 7-5/8"
6-1/2" 4 5.118 6-1/4"
6-3/4" 4 5.118 6-1/2"
5 5"
7-7/8" 4 5.118 7-5/8"
8-1/2" 4 5.118 8-1/4"
6-3/4" 4 5.630 6-1/2"
7-7/8" 4 5.630 7-5/8"
6 5-1/2"
8-1/2" 4 5.630 8-1/4"
8-3/4" 4 5.630 8-1/2"
7 6-5/8" 8-1/2" 5 6.772 8-1/4"
8-1/2" 5 7.165 8-1/4"
8 7" 8-3/4" 5 7.165 8-1/2"
9-7/8" 5 7.165 9-5/8"
9 7-5/8" 9-7/8" 5 7.795 9-5/8"
10-5/8" 6 8.780 10-3/8"
10 8-5/8" 11-5/8" 6 8.780 11-3/8"
12-1/4" 6 8.780 12"
11-5/8" 6 9.823 11-3/8"
11 9-5/8" 12-1/4" 6 9.823 12"
13-3/4" 6 9.823 13-1/2"
11-5/8" 6 10.079 11-3/8"
12 9-7/8" 12-1/4" 6 10.079 12"
13-3/4" 6 10.079 13-1/2"
12-1/4" 6 11.004 12"
13 10-3/4" 13-3/4" 6 11.004 13-1/2"
14-3/4" 6 11.004 14-1/2"
13-3/4" 7 11.969 13-1/2"
14 11-3/4" 14-3/4" 7 11.969 14-1/2"
15-1/2" 7 11.969 15-1/4"
16" 8 13.622 15-3/4"
15 13-3/8"
17-1/2" 8 13.622 17-1/4"
16" 8 13.878 15-3/4"
16 13-5/8"
17-1/2" 8 13.878 17-1/4"
16" 8 14.252 15-3/4"
17 14"
17-1/2" 8 14.252 17-1/4"
20" 10 16.280 19-3/4"
18 16"
22" 10 16.280 21-3/4"
22" 10 18.937 21-3/4"
19 18-5/8"
24" 10 18.937 23-3/4"
24" 10 20.315 23-3/4"
20 20"
26" 10 20.315 25-3/4"

44

CONDUCTOR PIPE CENTRALIZER
Model: WC-CRPC (WC-40601)

Conductor Pipe Centralizer are being used in
Oil Well Rig are available with us for
different hole size varying from 20‖to 30‖
for respective casing sizes.
WELLCARE Conductor pipe centralizers
provide the right features for getting a
good primary cementing job with
maximum casing/ wellbore stando ff.
WELLCARE Conductor pipe
centralizers are constructed of one piece
high strength corrosion resistant.
WELLCARE Conductor Pipe centralizers
provide ultimate drag and torque
reduction with maximum fluid bypass.
With low friction factor WELLCARE
Conductor pipe centralizers withstand
high wellbore temperatures while
providing maxi. horizontal standoff.
WELLCARE centralizers are wellhead
friendly and have high impact with
shock resistance, along with optimum
tensile and yield strength.

45

STOP COLLARS

TYPES OF STOP
COLLARS

Hinge Bolted Hinge Set Screw
S/C Stop Collar

Hinge Spiral Nail Slip On Set
S/C Screw Stop
Collar

46

PERFORMANCE OF STOP COLLAR :

Stop collars are being tested in accordance
with API 10D-2/ISO 10427-2 to evaluate
their performance characteristics reliable to
suite filed applications.

The test casing is within the tolerances as
indicated in ISO 11960 for non-upset pipe.

Burrs or Similar defects being removed prior
to testing.

The outer sleeve should provide a load
surface to distribute the load to the stop
device (as shown in Fig.-2).

Holding force being recorded at the starting
point of slippage of stop collar and till the
end of the test for displacement of stop
collar along the casing up-to 4 inch.

47


Hinged Bolted Stop Collars
MODEL : WC-SCHB ( WC-40901)

An economical collar suitable for subcritical
annular tolerances. Available in the size range 4
½ ‖ to 20‖, it has a cross bolt design which
makes it an efficient and user friendly device

Hinged Spiral Nail Stop Collars
MODEL : WC-SCHN (WC-40902)
Available in the size range 4 ½ ‖ to 20‖, this
device can be set in both upset and non-upset
casing to provide maximum clearance during
rotation.
It has a groove in the middle into which a
spiral nail can be driven for improved grip on the
casing. The broader band firmly grips the collar
into position around the casing.

Hinged Stop Collars with Set Screw
MODEL : WC-SCSS-1 (WC-40903)
device has a high cost-utility ratio. This hinged
collar with a row of set screws positions easily
and firmly around the casing.

Slip-on Stop Collars with Set Screws
MODEL : WC-SCSS (WC-40904)
This slip-on set screw device is recommended
for small hole operations. Available in size
range 2-7/8‖ to 20‖ and is gripped by a row of
screws, this is a heavy duty device

48


Wire Bristle Scratch
MODEL : WC-SCWS (WC-41001)
Consists of a hinged collar radiating into
bristles. Each bristle is made of hardened &
tempered wire with two scratching elements.
Available in the size range 4 ½ ‖ to 20‖ these
scratchers improve the cement bond between
the casing and porous formations while
reinforcing the cement column.

Wellbore Wipers
MODEL: WC-SCWW (WC-41101)

Consisting of loop wire cables of tempered
steel laced into a collar, these wipers clean the
well bore efficiently by permitting removed
filter cake to pass, thereby providing excellent
reinforcement to the cement column especially
under close spacing.
Available in size range 4 ½ ‖ to 20

49


Hinged Baskets
MODEL : WC-HWB (WC-41201)

device consists of flexible steel spring bows
welded to slip-on collars. Bows are hardened
and tempered for maximum strength and
uniformity. It is run on casing or liners above
weak or porous formations to provide
protection from hydrostatic pressure generated
by the cement column. Its overlapping metal
fins provide flexibility and fluid passage while
maintaining optimum support characteristics.

Slip-ON Baskets
MODEL : WC-SWB (WC-41202)

device consists of flexible steel spring bows
welded to slip-on collars. Bows are hardened
and tempered for maximum strength and
uniformity. It is run on casing or liners above
weak or porous formations to provide
protection from hydrostatic pressure generated
by the cement column. Its overlapping metal
fins provide flexibility and fluid passage while
maintaining optimum support characteristics.

50

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