Tubing String Tester Valve / Flapper TST Valve For DST service

The Tubing String Testing Valve is a full-opening valve in flapper type. The tubing string tester valve works as downhole tester valve for taking the pressure-test in drill stem test string while running in the hole.

The tubing string tester 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 valve can also be used for pipe flexing if it is run below an annulus pressure-responsive circulating valve.

The Tubing String Tester Valve consists of three main parts:

• Flapper valve and spring
• Shear pin section
• Locking dogs

Technical parameter of Tubing String Tester Valve

ZZ TOP Oil Tools Co., Ltd located in XI’AN City in China, we are in full service on design, production and supply of oilfield downhole tools and Wellhead Equipment.

Over more than 10 years, we become a fast growing organization, now our two sub-factories, equipped with CNC lathes, Miller, deep-hole drilling &boring machine and other advanced machines, have enough production capacity to meet the customers’ requirement. And we build a professional & strong team including technical, sales, logistic and leading management department, which make our company success of manufacturing and providing cost-effective downhole tools and create added value for customers around the world.

Now our tools are supplied to worldwide and enjoy the good reputation.We always focus on providing the our clients with highly efficient & expertized service and approach each enquiry with meticulous attention to technical specifications and insist on “Traceability, Serialization” for each tools. We will keep innovating and providing more durable products and reliable service for worldwide customers.