发明名称 |
PRESSURE AND FLOW CONTROL IN DRILLING OPERATIONS |
摘要 |
<p>A well drilling system includes a flow control device regulating flow from a rig pump to a drill string, the flow control device being interconnected between the pump and a standpipe manifold, and another flow control device regulating flow through a line in communication with an annulus. Flow is simultaneously permitted through the flow control devices. A method of maintaining a desired bottom hole pressure includes dividing drilling fluid flow between a line in communication with a drill string interior and a line in communication with an annulus; the flow dividing step including permitting flow through a flow control device interconnected between a pump and a standpipe manifold.</p> |
申请公布号 |
EP2707570(A1) |
申请公布日期 |
2014.03.19 |
申请号 |
EP20110865031 |
申请日期 |
2011.05.09 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
BERNARD, CHRISTOPHER, J. |
分类号 |
E21B43/12;E21B21/08;E21B34/06 |
主分类号 |
E21B43/12 |
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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