发明名称 |
INTELLIGENT EFFICIENT SERVO-ACTUATOR FOR A DOWNHOLE PULSER |
摘要 |
An improved energy efficient intelligent pulser driver used for generating a mud pulse in a MWD (measurement while drilling) application. In the pulser driver, a direct current (DC) powered control circuit activates a three-phase DC brushless motor that operates a servo-valve. Opening of the servo-valve equalizes pressure in a plenum causing the operation of a main valve reducing flow area and causing a pressure spike in the mud column. Closing of the servo-valve creates a reduction in mud pressure that operates the main valve and increases the flow area causing an end to the pressure spike. The servo-valve is powered both in opening and closing operations by the motor.
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申请公布号 |
US2009267791(A1) |
申请公布日期 |
2009.10.29 |
申请号 |
US20090495736 |
申请日期 |
2009.06.30 |
申请人 |
PRATT F DALE;SCHMIDT AXEL M;LAMBE KENNETH A |
发明人 |
PRATT F. DALE;SCHMIDT AXEL M.;LAMBE KENNETH A. |
分类号 |
G01V3/00;E21B47/18;G01V11/00;H04H9/00 |
主分类号 |
G01V3/00 |
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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