发明名称 |
DOWNHOLE TORQUE GENERATOR |
摘要 |
A torque-generating apparatus comprises a first assembly (10, 25) including a generally cylindrical member of magnetically soft material and having a longitudinal axis and a second assembly (2) arranged coaxially within the first assembly and including an electromagnetic winding (4). The first assembly (10, 25) and the second assembly (2) are rotatable relative to each other about the axis. Relative rotation between the first (10, 25) and secon d (2) assemblies induces a magnetic field which generates rotational torque between the first and second assemblies.
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申请公布号 |
CA2444815(A1) |
申请公布日期 |
2002.11.14 |
申请号 |
CA20022444815 |
申请日期 |
2002.05.01 |
申请人 |
SPRING, GREGSON, WILLIAM, MARTIN |
发明人 |
SPRING, GREGSON WILLIAM MARTIN |
分类号 |
E21B4/04;E21B7/06;E21B41/00;F04D13/10;F04D15/00;H02K7/18;H02K16/02;H02K17/34;H02K49/04;(IPC1-7):H02K49/04;E21B17/02;F04D29/66 |
主分类号 |
E21B4/04 |
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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