发明名称 |
A METHOD AND APPARATUS FOR DRILLING OFF A FLOATING STRUCTURE |
摘要 |
A floating rig or structure for drilling in the floor of an ocean using a rotatable tubular includes a seal housing having a rotatable seal connected above a marine riser fixed to the floor of the ocean. The seal rotating with the rotating tubular allows the riser and seal housing to maintain a predetermined pressure in the system that is desirable in underbalanced drilling, gas-liquid mud systems and pressurized mud handling systems. A flexible conduit or hose is used to compensate for the relative movement of the seal housing and the floating structure since the floating structure moves independent of the seal housing. A method for use of the system is also disclosed.
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申请公布号 |
CA2363495(C) |
申请公布日期 |
2008.02.12 |
申请号 |
CA20002363495 |
申请日期 |
2000.03.01 |
申请人 |
WEATHERFORD/LAMB, INC. |
发明人 |
BOURGOYNE, DARRYL A.;HANNEGAN, DON M. |
分类号 |
E21B33/08;E21B7/12;E21B21/00;E21B21/08;E21B21/10;E21B21/12;E21B34/04 |
主分类号 |
E21B33/08 |
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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