发明名称 |
RETRIEVABLE DOWNHOLE PUMPING SYSTEM |
摘要 |
A pumping system 10 is provided for pumping fluid from a downhole well to the surface through a production tubing string well. A rotatable drive rod 18 extends from the surface to power the downhole pump, and includes a plurality of rod couplings. The downhole pump includes a pump stator 22 and a rotor 24 rotatable within the pump stator. A lifting member 36 provided at the upper end of the stator is engaged by a drive coupling 34 to retrieve the pump from the well. The lifting member has an internal shoulder 44 tapered radially inwardly and upwardly, such that a rod coupling engages the internal shoulder and passes through the lifting member as the rotor is pulled upward.
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申请公布号 |
CA2562159(C) |
申请公布日期 |
2012.03.27 |
申请号 |
CA20062562159 |
申请日期 |
2006.09.29 |
申请人 |
ROBBINS & MYERS ENERGY SYSTEMS, L.P. |
发明人 |
BELCHER, IAIN;GUIDRY, MICHAEL;KRUPPA, SCOTT;KOLLATSCHNY, JASON |
分类号 |
E21B23/00;E21B23/02;F04C2/107;F04C15/00 |
主分类号 |
E21B23/00 |
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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