发明名称 |
FAILSAFE CONTROL SYSTEM FOR A SAFETY VALVE HAVING A CONDITION SENSING AND CHEMICAL INJECTION FEATURE |
摘要 |
A control system for a Subsurface Safety Valve (SSSV), includes an actuating piston mounted in a housing with at least one seal and connected to the SSSV. The actuating piston having a first end and a second end, the first end in fluid communication with a control line; a primary pressure reservoir in fluid communication with the second end of the actuating piston, the reservoir configured to contain a fluid under an amount of pressure selected to act against a prospective hydrostatic pressure expected in the control line based upon the selected position of the control system in a downhole environment. An equalizing piston in fluid communication with both the control line and with the second end of the actuating piston, the equalizing piston remaining in a closed position during shifting of the actuating piston with pressure applied or removed from the control line, the equalizing piston movable to an open position upon a control system failure that reduces pressure in the primary reservoir to below a threshold value; and a condition sensing and chemical injection assembly in fluid communication with the primary reservoir. A method for operating a control system for a Subsurface Safety Valve (SSSV). |
申请公布号 |
US2016053574(A1) |
申请公布日期 |
2016.02.25 |
申请号 |
US201414464139 |
申请日期 |
2014.08.20 |
申请人 |
Miller Wade A.;Jones Brett C. |
发明人 |
Miller Wade A.;Jones Brett C. |
分类号 |
E21B34/10;E21B34/06;F16K17/36 |
主分类号 |
E21B34/10 |
代理机构 |
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代理人 |
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主权项 |
1. A control system for a Subsurface Safety Valve (SSSV), comprising:
An actuating piston mounted in a housing with at least one seal and connected to the SSSV, the actuating piston having a first end and a second end, the first end in fluid communication with a control line; a primary pressure reservoir in fluid communication with the second end of the actuating piston, the reservoir configured to contain a fluid under an amount of pressure selected to act against a prospective hydrostatic pressure expected in the control line based upon the selected position of the control system in a downhole environment; an equalizing piston in fluid communication with both the control line and with the second end of the actuating piston, the equalizing piston remaining in a closed position during shifting of the actuating piston with pressure applied or removed from the control line, the equalizing piston movable to an open position upon a control system failure that reduces pressure in the primary reservoir to below a threshold value; and a condition sensing and chemical injection assembly in fluid communication with the primary reservoir. |
地址 |
Broken Arrow OK US |