Well Testing Operation Rupture Disc Dual Action Valve Downhole Tester Valve
In drill stem testing operation, there are different tester valves including select tester valve, LPR-N valve, tubing string tester valve and dual action valve. The dual action vlave is a full-opening and ball valve type tester valve and controlled by annular Rupture disc. The dual action valve can be used as a tester valve or a safety valve to close the well under emergency condition.
The RD-DAV can be run in hole in either the open or closed position, the tool can be operated by twice, so called as Dual action
or dual shot valve. A two-way ratchet of the dual action valve is used to prevent the operator mandrel from shifting, except in response to annulus overpressure.
The rupture disc dual action valve can be applied for many operations in high pressure high temperature oil wells and gas wells including downhole testing operation, well completion operation, reservoir testing operation, also the the dual action vlave can be used in deviated and deepwater wells.
Specification of Dual Action valve
| Type | DAV- Standard | DAV-HP |
| Max. OD, in | 5 | 5 [ |
| Tool ID, in | 2.25 | 2.25 |
| Pressure ratings Max. differential across wall, psi | 10,000 | 15,000 |
| Max. annular, psi | 12,000 | 20,500 |
| Max. tubing, psi | 13,000 | 23,500 |
| Max. across ball from above, psi | 10,000 | 15,000 |
| Max. across ball from below, psi | 10,000 | 15,000 |
| Temperature rating, degF | 350 | 350 |
| Length, ft | 5.08 | 5.08 |
| Weight, lbm | 246 | 246 |
| Service (NACE International MR-0175) | H2S, acid | H2S, acid |
| Tensile strength at min. yield, lbf | 350,000 | 350,000 |
| Connection | 31⁄2 IF | 31⁄2 IF or PH-6 |
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.
* 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 customers' benefits
* Techcore supply the cost effect products with 12 months guarantee
* Techcore insist on the traceability of each Drill stem testing tools and related DST parts
Welcome to contact us for more information of the downhole tools!
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