Downhole Testing Mechanical Tester Valve 5" x 10000 psi Alloy Steel
Introudction of Mechanical Tester Valve
Mechanical tester valve is a kind of tester valve used for drill stem testing operation, the mechanical tester valve is to open and close the well by lifting and lowering the drill pipe (or tubing) to control the ball valve of the tester valve. The tester valve is closed while the tool is running in hole. When the tool reached the predetermined depth, J-slot mandrel will move up and down by applying the weight of workstring, and the transposition lug can rotate freely, then it will move along the travel of index groove. The workstring is lifted or set down one time, the position of J-slot mandrel will change one time, like this, the ball valve can be opened and closed finally. Above movement can be repeated many times as required.
Technical parameter of Mechanical Tester Valve
| Tool Size | 5″ |
| OD | 127.5mm |
| ID | 57mm |
| Length | 2991mm |
| Bottom and Top Differential of Ball | 70MPa |
| Valve | 103.5MPa |
| Working pressure | 140MPa |
| Burst Strength | 130MPa |
| Collapse Strength | 2203KN |
| Tensile Strength | 24.6KN.m |
| Torque Strength | 3.5Mpa/per |
| Shear Value | NACE-0175 Sour Gas |
| Service Environment | Service(>175°F) |
| Working Temperature | -29℃～+204℃ |
| Connections Type | 3 7/8″CAS.B×P |
| 3 1/2″IF.B×P |
Constructure Features of the mechanical tester valve
Mechanical tester valve is composed of three major section: a inversion mechanism, a time-delay mechanism and a ball valve section. As shown on the index groove sketch map, the location marked with numbers is the travel line of transposition lug when lifting and setting down workstring every time.
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The main DST tool string includes RTTS packer, full bore retrievable circulating valve, full bore retrievable safety joint, select tester valve, downhole tester valve, omni valve / multi-cycle circulating valve, hydraulic jar, radia shock absorber,Vertical shock absorber, RD safety circulating valve, high pressure retrievable packer with bypass, IPO valve, tubing string test valve, and so on.
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