Oil and Gas Well Downhole Testing Dual Action Valve DAV Test Valve​

The dual-action valve is the DAV used in drill stem testing operation. The dual action vlave is a full-opening and annular Rupture disc controlled ball valve type downhole test valve tools. The dual action valve can be used as a tester valve or a safety valve to close the well under emergency condition.

The DAV is run in the closed position for the testing operation, it is opened by annulus overpressure (rupture disc), and then the DAV will be reclosed by a second annulus overpressure (rupture disc). The operator mandrels are balanced to ID pressure. A two-way ratchet of the dual action valve is used to prevent the operator mandrel from shifting, except in response to annulus overpressure.

Appliction of Dual Action Valve

* Downhole testing

* Reservoir testing

* Completion operations

* Deviated and deepwater wells

* HPHT oil wells or gas wells

Specification of Dual Action valve

Advantage of Techcore Oil Tools

Techcore Oil Tools expertise in manufacture of the Drill Stem Testing Tools for more than Ten years, the professional Reserch and Development (R&D) department improves the advanced technology in design of the Drill stem testing tools for well testing service.

Techcore designs and chooses the raw material of DST tools according to the customers' oil well condition, and make all our effort to supply the cost effective well testing tools to satisfy the customer, and improve the test tools to meet the industry’s demand for ultra-high pressure and temperature downhole operation.

Drill stem testing tools for cased hole, open hole and slim hole are available as below

RTTS Serires: Full bore retrievable packer, full bore retrievable circulating valve, full bore retrievable safety joint,

Tester Valve: downhole tester valve, select tester valve, LPR- N Valve, Tubing String Tester Valve

Circulating valve: omni circulating valve, multi-cycle circulating valve, RD Circulating valve, RD safety Circulating Valve, Hydraulic Circulating Valve

Other DST string tools: hydraulic jar, vertical shock absorber, radial shock absorber, RD safety circulating valve, high pressure retrievable packer with bypass, CHAMP packer, IPO valve, sleeve type drain valve, rupture disk sampler, super safety valve with control panel, BOP safety valve for downhole operation and so on.

Welcome to contact us for more information of the downhole tools!