Techcore Oil Tools Co.,Ltd,
Professional Provider & Manufacture of DST tools, Coiled Tubing Tools & Wireline Tools
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AISI Alloy Steel Internal Pressure Safety Valve Open Hole DST Equipment
The 3 7/8" Internal Pressure-Operated Circulating Valve is a sort of circulating valve used to the drill stem testing operation in slim hole,cased hole and open hole.
Operation of IPO circulating valve
The IPO circulating valve is operated by internal pressure (500 to 10,000 psi above hydrostatic). The pessure to operate the tool is determined by shear pins, which hold the sliding valve in the closed position. In order to open the valve, increasing the tubing pressure to a pressure above annulus hydrostaticequal to the shear value of the shear pins.
Specification of 3 7/8" IPO Circulating Valve
| Nominal Size /in. | OD /in | ID /in | Length /in | Flow Area | Number of | Working Pressure |
| 3 7/8 | 3 8/9 | 1.8 | 23.52 | 1.23 | 4 | 15000 psi |
Required Test to check the IPO Circulating valve
* Internal Pressure sealing test:
Do not install the shear pins, locking ring, shear sleeve, pin cover, install the test sleeve next to the shear mandrel in the bottom. Make up the test subs on the two ends of the tool.
* Function test:
Install four shear pins, attach the test caps on the two ends of the tool, fill the tool with water, increase pressure gradually to shear the pins and open completely the circulating ports,
* Record the test chart
*HSE* Safety Instructions:
1. When running each pressure test, you must increase pressure gradually. When the pressure is up to 20Mpa,Keep it for one minute, then every 10Mpa keep it for one minute until the rating pressure.
2. During the whole process, make sure the entire test operator keep away from plug and joint which may laps.
3. Test area should set isolation, others except operator not be allowed to enter test area.
4. If there is anybody in the test area, it should set isolation, avoiding test production fly off the test area.
About Techcore oil tools
Techcore oil tools has the capability to design and chooss 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.
The drill stem testing tools are applied in cased hole, open hole and slim hole, the main DST tool string includes RTTS packer,full bore retrievable circulating valve, full bore retrievable safety joint, select tester valve, omni valve, multiy cycle circulating valve, hydraulic jar, vertical shock absorber, radial 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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