发明名称 |
Fluid control circuit and method of operating pressure responsive equipment |
摘要 |
A fluid control circuit and method of operating equipment such as a blowout preventer having a two-way hydraulic piston and cylinder assembly. The circuit includes various features such as a dual pressure level independently controlled fluid supply, a dedicated secondary fluid supply reserved for supplemental use, a dedicated fluid supply reserved for exclusive use in one operating branch, automatic sensor for applying a reserve fluid supply on a sensed demand, a pressure intensifier for increasing available operating force, and control circuitry for preventing loss of enhanced secondary operating energy into a primary circuit.
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申请公布号 |
US4955195(A) |
申请公布日期 |
1990.09.11 |
申请号 |
US19880287180 |
申请日期 |
1988.12.20 |
申请人 |
STEWART & STEVENSON SERVICES, INC. |
发明人 |
JONES, MARVIN R.;LEMOINE, JOSEPH L. |
分类号 |
E21B34/16;F15B3/00 |
主分类号 |
E21B34/16 |
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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