Invention Grant
- Patent Title: Selectively activatable and deactivatable wellbore pressure isolation device
- Patent Title (中): 选择性活化和无活性井筒压力隔离装置
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Application No.: US13087810Application Date: 2011-04-15
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Publication No.: US08733449B2Publication Date: 2014-05-27
- Inventor: Muhammad Asif Ehtesham , Robert Lee Pipkin , Michael Brent Bailey
- Applicant: Muhammad Asif Ehtesham , Robert Lee Pipkin , Michael Brent Bailey
- Applicant Address: US OK Duncan
- Assignee: Hilliburton Energy Services, Inc.
- Current Assignee: Hilliburton Energy Services, Inc.
- Current Assignee Address: US OK Duncan
- Agency: Conley Rose, P.C.
- Agent John Wustenberg
- Main IPC: E21B34/06
- IPC: E21B34/06

Abstract:
An apparatus comprising a tubular body defining a flowbore, a first valve that, when activated, restricts fluid communication via the flowbore in a first direction and allows fluid communication in a second direction, and, when deactivated, allows fluid communication in the first and second directions, a first sleeve slidable from a first to a second position that, when in the first position, the first valve is activated, and, when in the second position, the first valve is deactivated, a second valve, that, when activated, restricts fluid communication in the first direction and allows fluid communication in the second direction, and, when deactivated, allows fluid communication in the first and second directions, and a second sleeve slidable from a first to a second position, that, when in the first position, the second valve is deactivated, and, when in the second position, the second valve is activated.
Public/Granted literature
- US20120261136A1 Selectively activatable and deactivatable wellbore pressure isolation device Public/Granted day:2012-10-18
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