2. Eng. El Sayed Amer
10 Tubing
applications
• Production tubing is installed to allow
hydrocarbons to flow from reservoir to the
surface and protect the casing from reservoir
fluid.
• production tubing generally averages 28-32 feet
in length.
3. Eng. El Sayed Amer
10 Tubing
applications
Tubing is “typed” according to four criteria.
I. Size :
Refers to the outside diameter (in inches or millimeters) or the tube body
itself. Tubing is available in various external diameters. API recognized sizes
for production tubing vary from 3/4 inch to 4 1/2 inch.
II. Weight:
An average given in pounds/foot of kilograms/meter. Tubing is available in
various weights for each particular size.
III. Grade:
Term used to describe the type of metal alloy of which the pipe is made. J-
55, N-80, P-105.
IV. Thread:
Design of the connection on either end of the pipe
4. Eng. El Sayed Amer
10 Tubing
applications
Tubing is “typed” according to four criteria.
I. Size:
is the outside diameter of the pipe body. The most used sizes are:
2-⅜” , 2-⅞” , 3-½” and 4-½”.
6. Eng. El Sayed Amer
10 Tubing
applications
Tubing is “typed” according to four criteria.
II. Length:
Tubulars are manufactured in lengths termed joints
✓ range 1 : 20 to 24 feet;
✓ range 2 : 28 to 32 feet;
✓ range 3 : 32 to 48 feet
Pup joints or spacers are used for shorter lengths.
Tubing Ranges
Range 1 (feet) Range 2 (feet) Range 3 (feet)
20-24 28-32 38-42
8. Eng. El Sayed Amer
134
PUP JOINTS
Pup joints are short tubing joints that give flexibility in attaining
a desired tubing length
9. Eng. El Sayed Amer
10 Tubing
applications
Tubing is “typed” according to four criteria.
III. Grade:
Tubing grades criteria are specified by API:
• Standard API grades J-55, C-75, C-95, N-80, P-105
• Special grades e.g., C-75 and C-95 for H2S service
Selection of tubing grade is based on:
• Physical strength
• Chemical Properties (resistance to H2S, CO2, water etc.)
• Availability and standardization at customer
• Cost
10. Eng. El Sayed Amer
10 Tubing
applications
Tubing is “typed” according to four criteria.
III. Grade:
• Sour Corrosion: resistance to H2S, low hardness, stress relieved, J55, C75, C95.
• Sweet Corrosion: CO2, provisions for inhibition or appropriate material selection,
L80 13 Cr
11. Eng. El Sayed Amer
10 Tubing
applications
Tubing is “typed” according to four
criteria.
III. Connections:
Two standard API Connections available:
1. Non-Upset (NUE):
• is a 10 round thread.
• Joint strength<Pipe body
2. Upset Connection (EUE)
• Is a 8 round thread.
• Joint strength>pipe body
12. Eng. El Sayed Amer
There are two types of thread connection, API and Premium:
• Premium connections are proprietary connections that offer premium
features not available on API connections.
• Most offer a metal-to-metal seal for improved high pressure seal integrity.
• Premium connections exist with features such as flush connections, recess
free bores, and special clearance.
• An example of a premium thread is shown in the following fig:
III.Connections:
22. Eng. El Sayed Amer
148
Production Tubing
Design of production tubing should satisfy the following criteria:
• Minimizing pressure drop
01
02
03
04
• High strength for suspension
of tubing joints
• High internal pressures for
fluids flow
• High external pressures
(between annulus & tubing)
05 • Resistant to chemical
corrosion
23. Eng. El Sayed Amer
149
Tubing Connection Make up Torque
I. Under torque ------------------ leakage
II.Over torque ------------------thread failure &
damage to seal
I. Recommended torque values are applied by manufactures .
