发明名称 |
DOWNHOLE ACTUATION SYSTEM UTILIZING ELECTROACTIVE FLUIDS |
摘要 |
Downhole wellbore tolls (14) are actuated by electrically controllable fluid s energized by a magnetic field for example. When energized, the viscosity sta te of the fluid may be increased by a degree depending on the fluid formulation . Reduction of the controllable fluid viscosity by terminating a magnetic fiel d acting upon the fluid may permit in situ wellbore pressure to display a tool actuating piston (16). Displacement of the tool actuating piston (16) is prevented by the controllable fluid in a viscous state. The viscous sate of the fluid is energized by a magnetic field environment. When the field is de - energized, the controllable fluid viscosity quickly falls thereby permitting the fluid to flow through an open orifice (40) into a low pressure receiving volume (36). In an alternative embodiment of the invention, an expandable volume fluid may be used against a slip actuating element in the same manner as a fluid pressure motor. A magnetic field, aligned to act upon the controllable fluid, causes the fluid to volumetrically expand and thereby display a slip actuating piston.
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申请公布号 |
CA2456189(A1) |
申请公布日期 |
2003.03.06 |
申请号 |
CA20022456189 |
申请日期 |
2002.07.19 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
CARMODY, MICHAEL A.;GOODSON, JAMES E., JR. |
分类号 |
E21B23/04;E21B33/1295;E21B34/00;F15B21/06;(IPC1-7):E21B33/129;E21B34/06 |
主分类号 |
E21B23/04 |
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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