发明授权
- 专利标题: Method of drilling and running casing in large diameter wellbore
- 专利标题(中): 大直径井眼钻井和运行套管的方法
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申请号: US13645880申请日: 2012-10-05
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公开(公告)号: US08607859B2公开(公告)日: 2013-12-17
- 发明人: Erik P. Eriksen
- 申请人: Erik P. Eriksen
- 申请人地址: US TX Sugar Land
- 专利权人: Schlumberger Technology Corporation
- 当前专利权人: Schlumberger Technology Corporation
- 当前专利权人地址: US TX Sugar Land
- 代理机构: Osha Liang LLP
- 主分类号: E21B7/20
- IPC分类号: E21B7/20 ; E21B33/13
摘要:
A well is drilled and casing installed utilizing a casing drilling technique. A bottom hole assembly having a drill bit and a fluid diverter is secured to a string of drill pipe and installed within a casing string. Drilling fluid is pumped down the drill pipe string to cause the drill bit to rotate and drill the well while the fluid diverter is in a drilling mode position. At the total depth for the casing string, the operator moves the fluid diverter to a cementing position and pumps cement down the drill pipe and up the casing string annulus. After cementing, the operator moves the fluid diverter to a packer set position and again pumps drilling fluid down the drill string to set the packer.
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