Drill Stem Testing Tools Hydraulic Circulation Valve High Pressure DST Tools
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Drill Stem Testing Tools Hydraulic Circulating Valve High Pressure DST Tools
Introudction of Hydraulic Circulating Valve
The Hydraulic Circulating Valve is a kind of the circulating valve applied for the drill stem testing operation. The hydraulic circulating valve serves as a bypass around the packer or as a circulating valve to circulate a well after testing. When run below a closed valve, the hydraulic circulating valve serves as a bypass around the packer and helps relieve pressure buildup below the closed valve when it is stung into a production packer.When run above a closed valve, the hydraulic circulating valve can be used as a circulating valve when the workstring is picked up.
Features and Benefits of the Hydraulic Circulating Valve
* The hydraulic circulating valve permits passage of wireline
tools through its full-opening bore
Operation of the Hydraulic Circulating Valve
Bypass ports close when weight is set down and reopen when weight
is lifted. A hydraulic metering system
Technical parameter of Hydraulic Circulating Valve
﹡HSE﹡Safety instructions of the Hydraulic Circulating Valve:
1. When running each pressure test, you must increase pressure gradually. When the pressure is up to 20MPa, hold on for one minute, then every 10MPa keep it for one minute until the rating pressure; 2. During doing the pressure test, the tool should be placed in the test pit and cover the protecting board on the pressure test plug. 3.During the whole process, make sure the entire test operator keep away from plug and joint which may lapse. 4.Test area should set isolation, others except operator not allowed to enter test area. 5.If there is anybody in the test area, it should set isolation, avoiding test production fly off the test area. |
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