发明名称 |
Marine structure and method of drilling a hole by means of said structure |
摘要 |
A bottom-positioned well drilling platform is provided with an enclosure in the lower part thereof which forms a chamber into which returning drilling mud and cuttings can be discharged. A pump and separate return line raise the mud alone from the chamber to the top of the platform while the cuttings remain in the chamber.
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申请公布号 |
US4134461(A) |
申请公布日期 |
1979.01.16 |
申请号 |
US19770821059 |
申请日期 |
1977.08.01 |
申请人 |
SHELL OIL COMPANY |
发明人 |
BLOMSMA, EVERHARD C. |
分类号 |
E21B7/136;E21B21/00;E21B21/06;(IPC1-7):E21B15/02;E21B7/18 |
主分类号 |
E21B7/136 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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