- 专利标题： Use of downhole isolation valve to sense annulus pressure
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申请号： US14032866申请日： 2013-09-20
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公开(公告)号： US09650884B2公开(公告)日： 2017-05-16
- 发明人: Joe Noske , Gary L. Mueller
- 申请人： Weatherford Technology Holdings, LLC
- 申请人地址： US TX Houston
- 专利权人： WEATHERFORD TECHNOLOGY HOLDINGS, LLC
- 当前专利权人： WEATHERFORD TECHNOLOGY HOLDINGS, LLC
- 当前专利权人地址： US TX Houston
- 代理机构： Patterson & Sheridan, LLP
- 主分类号： E21B47/06
- IPC分类号： E21B47/06 ; E21B21/10 ; E21B34/10 ; E21B21/08
摘要：
A method of drilling a wellbore includes deploying a drill string into the wellbore through a casing string disposed in the wellbore. The casing string has a pressure responsive element and a hydraulic line in communication with the element and extending along the casing string. While drilling the formation, the method includes monitoring a pressure of the hydraulic line to ensure control of the formation.
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