High Pressure RTTS Circulating Valve DST Tools String Bypass Valve
The RTTS Circulating valve is the full bore retrievable circulating valve, applied for drill stem testing operaion. The RTTS circulating valve is designed with a locked-open/locked-closed mode, and serves as both a circulating valve and bypass valve. The circulating valve can be locked closed when the packer is unset to reverse fluid around the bottom of the packer. The full opening structure of the RTTS circulating valve allows tubing-type guns and other wire line equipment to pass.
How to operation the RTTS circulating valve
The RTTS circulating valve is automatically locked in the closed position when the packer is set. During testing and squeezing operations, the lock helps prevent the valve from being pumped open. A straight J-slot in the locked-open position can be used with the straight J-slot(optional) in the packer body. This combination eliminates the need to turn the tubing to close the circulating valve or reset the packer after the tubing has been displaced with cement.
The RTTS circulating valve can be run directly above the packer body or further up the work string.When placed in the hole, the valve must be in the locked-open position. The J-slot in the packer-body drag block(or drag sleeve)must also be placed in the unset position.
When the circulating valve is opened to come out of the hole, the tubing is lowered, turned to the right, and picked up.
Technical parameter of Full Bore Retrievable Packer
| No. | Specifications9 | 9 5/8" RTTS Circulating valve |
| 1 | OD | 155.5mm |
| 2 | ID | 76.2mm |
| 3 | Total Length(Compress state) | 1088.7mm |
| 4 | Stroke | 167.5mm |
| 5 | Working pressure | 70Mpa |
| 6 | Outer yield pressure strength | 107MPA |
| 7 | Internal Yield pressure strength | 102MPA |
| 8 | Circulating port areas | 2550mm |
| 9 | Service Temperature | -20oC~+204oC |
| 10 | End connection | 4 1/2”IF. BXP |
| 11 | Service Condition | H2S As per NACE MR 0175(>175oF) |
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 are available for cased hole, open hole and slim hole including:
Full bore retrievable packer, full bore retrievable circulating valve, full bore retrievable safety joint, downhole tester valve, select tester valve, LPR- N Valve, omni valve, multi-cycle circulating valve, hydraulic jar, vertical shock absorber, radial shock absorber, RD safety circulating valve, high pressure retrievable packer with bypass, CHAMP packer, IPO valve, tubing string test valve, sleeve type drain valve, rupture disk sampler, super safety valve with control panel, BOP safety valve for downhole operation and so on.
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High Pressure RTTS Circulating DST String Bypass Valve Images
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