发明名称 |
Force balanced rotating pressure control device |
摘要 |
Force balancing adjusts hydraulic fluid pressure in an upper piston area of a Rotating Pressure Control Device (RPCD) that has an inner housing rotatably engaged within an outer housing by an upper bearing and a lower bearing. The hydraulic fluid pressure is adjusted to balance net force in a upper piston area and a lower piston area. The fluid pressure adjustment creates a force differential that balances the total load transmitted through the upper bearing and the lower bearing and thereby extends the life of the sealing element and bearings. Additionally, a wear indicator signals the end of the useful life of the drill pipe sealing element.
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申请公布号 |
US7743823(B2) |
申请公布日期 |
2010.06.29 |
申请号 |
US20070757892 |
申请日期 |
2007.06.04 |
申请人 |
SUNSTONE TECHNOLOGIES, LLC |
发明人 |
HUGHES WILLIAM JAMES;RICHARDSON MURL RAY;PETTIGREW THOMAS L.;VANDERVORT KURT D.;YOUNG KENNETH D. |
分类号 |
E21B33/06 |
主分类号 |
E21B33/06 |
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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