Drill Stem Testing Tools APR Downhole Tester Valve Select Tester Valve

Structure of Downhole Tester Valve

The select tester valve is composed of four basic sections; ball valve section, upper hydraulic section, nitrogen section and the metering section.

* The ball valve section contains the ball valve and the mechanism that rotates the ball when the tool is activated; the ball is rotated to the open position allowing the reservoir to flow into the testing string.

* The upper hydraulic section is contained between the upper annulus ports and the nitrogen filler valve. The critical part of this section is the metering (power) cartridge and selector.

The metering section is composed of the lower oil chamber, metering cartridge and floating piston. The oil in this section acts as a barrier between the tool and the annular fluid. This insures that only clean fluid passes through the metering cartridge. The metering cartridge provides the area that the operating pressure acts over to open the valve. The metering cartridge has two parallel flow paths through it, Each path only allows fluid to move in a single direction. The first flow path contains a check valve. This path allows oil unrestricted flow into the upper oil chamber from lower oil chamber. The second path contains a pressure relief valve and a time-delay valve. This path only allows fluid to move into the lower oil chamber from upper oil chamber slowly when the pressure relief valve open.

* The selector provides the means to close the valve. The selector aligns a set of lugs that transmit the forces generated by a operating piston and the trapped nitrogen pressure into the operating mandrel to close the valve. The selector sleeve has a path machined into it that maintains the alignment of the lugs on the sleeve and the splines in the operating connector. The operating connector is attached to the operating piston through a thread connection.

The nitrogen section is composed of the nitrogen case, nitrogen mandrel, floating piston and nitrogen filler valve. The nitrogen acts as an adjustable spring and provides the force needed to close the ball valve.

Specification of Downhole tester valve

Techcore Service

Techcore Oil Tools expertise in manufacture of the downhole oil 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, coiled tubing tools for CT 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.

Continuous after sales service

Techcore provides the prompt after-sales service to our customers to guarantee your benefits. For the complete downhole tools, we provide the free training in our factory, and if you need the site instruction, we can appoint our technical engineer to your site for the training.

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