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Drill Stem Testing Tools Tubing String Testing (TST) Valve with ball

The tubing string testing (TST) valve is a full-opening valve used to pressure-test the workstring while running in the hole.

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 grooveonce the locking dogs have falled groove, the ball valve will be locked open. Allowing fluid trapped lnsidthe 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