Invention Grant
- Patent Title: Hydrostatic equalizing stem check valve
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Application No.: US15578017Application Date: 2017-02-10
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Publication No.: US10662736B2Publication Date: 2020-05-26
- Inventor: Thomas Murphy , Peter DW Inglis
- Applicant: Halliburton Energy Services, Inc.
- Applicant Address: US TX Houston
- Assignee: Halliburton Energy Services, Inc.
- Current Assignee: Halliburton Energy Services, Inc.
- Current Assignee Address: US TX Houston
- Agency: C. Tumey Law Group PLLC
- Agent Benjamin Fite
- International Application: PCT/US2017/017312 WO 20170210
- International Announcement: WO2018/147860 WO 20180816
- Main IPC: E21B34/06
- IPC: E21B34/06 ; F16K15/04 ; F16K15/18
Abstract:
A pressure-activated device is inserted in a string for insertion into a borehole. The pressure-activated device has an indexing mechanism. The pressure-activated device has a piloted check valve that prevents the indexing mechanism from operating unless a pressure on an outside diameter of the pressure-activated device exceeds an activation threshold.
Public/Granted literature
- US20190376364A1 Hydrostatic Equalizing Stem Check Valve Public/Granted day:2019-12-12
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