Once the casing is run and held in place with cement, production tubing is run into the oilwell.
Joints of tubing are connected together with couplings to make up a tubing string. Running tubing into an oilwell is much the same as for running in casing, but tubing is smaller in diameter and is removable.
The prodution string provides a continuous bore from the reservoir to the wellhead and together with the other components of the production string, produces oil and gas at the surface.
As opposed to casing, production tubing is designed to enable quick, efficient, and safe installation, removal and re-installation.
Oil and gas is also produced more effectively through tubing than through larger-diameter production casing.
Below is a list of standard API5CT Tubing specifications.
We are able to supply all API specification tubing as well as non-API specifications for special situations, including those with semi-premium and premium connections.
We hold many combinations of common-spec’d tubing on the ground and can deliver these in quick turnaround.
Please contact us to discuss your requirements.
| Specification | ||
| Sizes | Outside Diameter (Inches) | Corresponding Poundage (Pounds Per Foot) |
| 1.050 | 1.14 PPF to 1.54 PPF | |
| 1.315 | 1.70 PPF to 2.24 PPF | |
| 1.660 | 2.09 PPF to 3.07 PPF | |
| 1.900 | 2.40 PPF to 5.15 PPF | |
| 2.063 | 3.24 PPF to 4.50 PPF | |
| 2-3/8 | 4.00 PPF to 7.45 PPF | |
| 2-7/8 | 6.40 PPF to 11.50 PPF | |
| 3-1/2 | 7.70 PPF to 17.00 PPF | |
| 4 | 9.50 PPF to 22.20 PPF | |
| 4-1/2 | 12.60 PPF to 26.10 PPF | |
| Grades | H40, J55, N80, N80Q, L80, C90, C95, T95, P110, 13CR | |
| Connections |
NUE (non-upset tubing), EUE (external upset tubing), IJ (integral joint tubing), [Please enquire for semi-premium and premium connections. See also our Metal One Connections.] |
|
| Lengths | Range 1, Range 2 & Range 3 | |
| Protection |
External Bare and Uncoated OR Externally Coated with Anti-Rust Mill Varnish Plastic OR Metal Pin and Box Protectors. Internal Plastic Coating OR Sleeves. |
|
| Mill Test Certificates |
Issued in accordance with API Specification 5CT Eighth Edition. Third Party Inspection can be performed on request at buyer’s care and expense. |
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