发明名称 |
REVERSE ROTATION PROTECTION FOR BOREHOLE PUMPS |
摘要 |
The invention relates to a reverse rotation protection for borehole pumps, said reverse rotation protection being mounted in a drive head. The reverse rotation protection comprises a housing and a clamping tool for securing a polished rod. The clamping tool comprises at least two exchangeable contact elements which detachably fix the polished rod. |
申请公布号 |
CA2831521(A1) |
申请公布日期 |
2012.11.01 |
申请号 |
CA20122831521 |
申请日期 |
2012.04.19 |
申请人 |
NETZSCH PUMPEN & SYSTEME GMBH |
发明人 |
CEMIN, ANGELO;DITTRICH, JOCHEN;ZUBER, ALEXANDER |
分类号 |
E21B43/12;F04B47/00;F16D51/48;F16D65/16;F16D65/22 |
主分类号 |
E21B43/12 |
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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