Couplings to tubing.
Strength groups
D (with execution of A and B), K, E.
Temporary resistance, MPa not less
655; 638; 687; 689.
Yield strength, MPa not less
379; 373; 491; 552.
Relative elongation, % not less
14,3; 16,0; 12,0; 13,0.
Description
Tubing is manufactured according to GOST 633-80, ST RK ISO 11960-2009. They are used during the operation of oil and gas wells for the transportation of liquids and gas inside the casing, as well as for repair and lifting operations.
Each pipe is equipped with a coupling fixed on a muff-turning machine. All pipes with screwed-on couplings are subjected to internal hydraulic pressure tests, depending on the pipe, wall thickness, and steel strength group. The threads of the couplings and tubing are protected by safety caps and nipples using anti-corrosion lubricants.
According to the standard and the certificate of conformity, steel pipes are produced in strength groups D (with versions A and B), K, E.
Exporter Information
1
Countries of distribution
3
Oil and gas and oilfield equipment for oil and gas production
