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Drill Stem Testing Tools Tubing String Testing (TST) Valve with ball
Product Parameters
Product Parameters
Drill Stem Testing Tools Tubing String Testing (TST) Valve with ball
Product Introduction
The tubing string testing (TST) valve is a full-opening valve used to pressure-test the workstring while running in the hole. The valve is operated after it is stung into a permanent packer or after a retrievable packer is set. The TST valve requires a differential pressure between the annulus and the tubing to shear. The TST valve can also be used for pipe flexing if it is run below an annulus pressure-responsive circulating valve.
The ball valve can be locked in the open position before coming out of the hole applied to the annulus will shear a set of shear pins, which caused the shear pin be upward, dropping flue locking dogs into a groove, once the locking dogs have falled groove, the ball valve will be locked open. Allowing fluid trapped lnside the well drain out while the stiing is retrieved from the hole.
Technical data:
Specifications | 5〃 |
OD | 120.7mm |
ID | 57mm |
Length | 1216.4mm |
Top and Bottom Differential of Flapper Valve | 68.95MPa |
Working Pressure | 68.95MPa |
Burst Strength | 96.6MPa |
Collapse Resistance | 91.3MPa |
Tensile Strength | 738KN |
Torque Strength | 16.4KN.m |
Shear Value of single screw | 725.75Kg( 16001b) |
Shear Value of single shear pin | l.84MPa/ per |
Service Environment | NACE MR-0175 Sour gas service (> 175F°) |
Working Temperature | -29C〜十204C |
