发明名称 |
A SYSTEM FOR CONTROLLING WELLBORE PRESSURE DURING PUMP SHUTDOWNS |
摘要 |
The present disclosure contemplates a method and apparatus for maintaining well pressure control despite fluctuations arising due to mud pump speed changes during startup and shutdown of a mud pump. More particularly, the present disclosure relates to a method and apparatus for closely coordinating changes in mud pump speed, or the flow rate of drilling mud, with the operation of choke valves for the maintenance of a constant drilling fluid pressure during drilling breaks such as the addition of drill pipe sections to the drill string. |
申请公布号 |
WO2015179408(A1) |
申请公布日期 |
2015.11.26 |
申请号 |
WO2015US31590 |
申请日期 |
2015.05.19 |
申请人 |
POWER CHOKES |
发明人 |
SPENCER, DANNY;MCCASKILL, JOHN W.;CHARLES, SCOTT;MCHARDY, JOHN |
分类号 |
E21B21/08 |
主分类号 |
E21B21/08 |
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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