发明名称 |
Liner Drilling and Cementing System Utilizing a Concentric Inner String |
摘要 |
A method of drilling a well and installing a liner includes assembling concentric inner and outer strings of tubulars. A drill bit is located at the lower end of the inner string and a liner with a liner hanger makes up part of the outer string. The inner and outer strings may be rotated in unison to drill the well. At a selected depth, the operator sets the liner hanger and retrieves the inner string. The operator lowers a packer and a cement retainer on a string of conduit. The packer engages the liner hanger and the cement retainer is conveyed to the lower end of the liner. The cement retainer prevents cement in the outer annulus from flowing back up the string of conduit. The operator manipulates the conduit to set the packer.
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申请公布号 |
US2009107675(A1) |
申请公布日期 |
2009.04.30 |
申请号 |
US20080347443 |
申请日期 |
2008.12.31 |
申请人 |
TESCO CORPORATION |
发明人 |
ERIKSEN ERIK P.;BROUSE MICHAEL |
分类号 |
E21B7/00;E21B3/00;E21B19/00 |
主分类号 |
E21B7/00 |
代理机构 |
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代理人 |
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主权项 |
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