slim hole DST tools Tubing string testing valve

Product Description

Payment & Shipping Terms Supply Capacity
Unit Price: 100.0 USD Production Capacity: 10 pcs/month
Trade Term: FOB,CFR,EXW Packing: polywood case
Payment Terms: L/C, D/A, T/T Delivery Date: 7 days
Min. Order: 1 Piece/Pieces
Means of Transport: Ocean, Air, Land

slim hole DST tools Tubing string testing valve

3 7/8″ x 15000psi slim hole drill stem testing valve


Brief of DST tubing string testing valve / TST valve

The tubing string testing /TST valve is used to pressure-test the work string while running in the hole. The valve is operated after it is stung into a permanent packer or 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 pip flexing if it is run below an annulus pressure-responsive circulating valve.


The TST valve consists of: 

• Flapper valve and spring.

• shear pin section

• locking dogs


DST Tools 3 7/8”Rupture Disk (RD) Tubing String Testing (TST) Valve

Materiall Alloy AISI 4140and Inconnel
Operate Full-opening, annulus pressure
Size: 3 7/8 inch
Working condition: High pressure high temperature
Working pressure: 10000psi ~ 15000psi
Service H2S above 175oF ; Full H2S
Application: Drill stem testing /well testing
Standard: NACE MR0175