发明名称 |
Clampless adjustable polish rod and well drilling equipment comprising same |
摘要 |
A polish rod apparatus connectable between a motion imparting mechanism of a pump jack and a string of sucker rods comprises a polish rod and a lift device. The polish rod has a center portion extending between its first end portion and second end portion. The center portion includes a thread structure extending along a portion of its length. The first end portion is connectable to the string of sucker rods. The lift device has an adjuster body including a central passage extending therethrough. The central passage of the adjuster body includes a thread structure matingly engagable with the thread structure of the polish rod such that rotation of the adjuster body relative to the polish rod causes axial movement of the adjuster body along a longitudinal axis of the polish rod thereby enabling vertical adjustment of the sucker rod assembly with respect to the motion imparting mechanism.
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申请公布号 |
US2010037716(A1) |
申请公布日期 |
2010.02.18 |
申请号 |
US20090462271 |
申请日期 |
2009.07.31 |
申请人 |
ROLAN JOHN |
发明人 |
ROLAN JOHN |
分类号 |
F16H21/32;E21B43/00;E21B43/12;F04B47/02;F16C7/00 |
主分类号 |
F16H21/32 |
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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