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Drill Stem Testing Tools Oil and Gas Well Select Tester Valve Operation
How to operate the select tester valve.
The select tester valve is a kind of downhole tester valve in Halliburton type, which is used to drill stem testing operation in oil well / gas well.
Under normal operating conditions the tool would be run in the well in the closed position. Once the packer is set, pressure is applied to the annulus to operate the tester valve.
To operate the select tester valve, the metering cartridge delays the transmission of this pressure to the bottom side of the power cartridge. This creates the differential pressure that acts across the power cartridge area to produce the force necessary to open the ball.
After a specific time (which is dependent upon bottom hole conditions and applied pressure), the nitrogen pressure increased by the amount of pressure applied to the annulus. When the applied annulus pressure is released to close the ball valve, the metering cartridge delays the release on this pressure from the nitrogen section.
At this point differential pressure passes through the power cartridge and acts across the operating piston area which will move the operating mandrel up and close the ball valve. To activate the lock-out feature the normal applied operating pressure is increased by 1300～1500 psi.
After the nitrogen pressure has been allowed time to stabilize, a minimum of 10 minutes is required, the annulus pressure is released
Specification of Downhole tester valve
| NO. | Specification | 5” |
| 1 | OD | 5”(127mm) |
| 2 | ID | 2.25”(57mm) |
| 3 | Length(mm) | 288.2”(7319.5mm) |
| 4 | Working pressure | 15000 PSI(105Mpa) |
| 5 | Maximum open pressure differential | 5000PSI(35Mpa) |
| 6 | Tensile strength(Yield) | 2020.5kN |
| 7 | Internal Pressure Strength | 151Mpa |
| 8 | External Pressure Strength | 141Mpa |
| 9 | Torque strength | 30.9kN.m |
| 10 | Service Environment | Mud, crude oil, natural gas with H2S, Apply to NACE MR0175-2003 |
| 11 | Service temperature | -20oF~400oF |
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.
* Techcore insist on superior quality, strong packing & timely delivery.
* Third party inspection is available from SGS, BV, DNV etc.
* Techcore do the best to supply thoughtful and prompt after-sales service to guarantee for the
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!
