5 Inch Drill Stem Test Tools Tubing String Testing Valve 15000 PSI Antirust

Introudction of Tubing String Testing Valve

The tubing string testing valve - TST valve is designed in full-opening and operated by annulus pressure in the hole. the TST valve is used to pressure-test the work string during running in the hole. The TST 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 applied for pip flexing if it is run below an annulus pressure-responsive circulating valve.

Structure of the Tubing String Testing Valve

* Flapper valve and spring.

* Locking dogs

* Shear pin section

Operation of the TST Valve

When the tubing string testing flapper valve opens, it allows the workstring to fill up. The shear pins hold the mandrel in place. The workstring can be pressure-tested as many times as required as it is run in the well. After string testing finished, increasing annulus pressure made the flapper valve open, also can process closing well operation for tester valve (pressure-responsive valve).

Application of Tubing String Testing Valve

* Cased hole drill stem testing operation.

* Oil well flow operations

Features and Benefits of Tubing String Testing Valve

* It only need 4psi to open the flapper valve.

* The testing string can be pressure-tested as many times as required as it is in the hole.

* Valve shear rating can be pre-determined at 500psi increments.

* Valve can also be used for pipe flexing.

Technical parameter of Tubing String Testing Valve

TST Inner seal pressure test chart

Tubing String Testing Valve 5" - 15000 psi Cased Hole Drill Stem Test Tools

ZZ Top Oil Tools Co.,Ltd as head office registered in Xi’an City in 2010, and in 2016, ZZ TOP OIL TOOLS enlarged the downhole oil tools factory under the Brand - TECHCORE in Baoji, which engages in designing and manufacturing the downhole oil tools including DST tools, Coiled tubing tools etc.

As one group, ZZ TOP provides the clients highly efficient & expertise service as well as more comprehensive products to meet the customers' requirements during the work, and insists on "Traceability, Serialization" for each tools and related parts

Equipments List

Techcore specialized in design, manufacture and sales of the oil well downhole tools as below:

* Drill stem testing tools for cased hole,  open hole and slim hole:

Retrievable packer, circulating valve,safety joint, downhole tester valve,LPR- N Valve, multi-cycle circulating valve, hydraulic jar, shock absorber, RD safety circulating valve,CHAMP packer, IPO valve, tubing string test valve, drain valve,RD sampler, super safety valve etc.

* Coiled Tubing Tools: Double slip connector, roll on connector, roll on x thread connector, double flapper check valve, motor head, dual function circulating valve, hydraulic jar, fishing tools etc.

* Perforating tools: Various perforator & perforating gun system, Shaped Charge Body

 *Oil well completion tools include: Subsurface safety valve, wireline retrievable subsurface safety valve, single string production packer, dual strings production packer, ESP packer, mechanical set packer, permanent packer, compensation device, bridge plug, sliding sleeve, nipples etc. 

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