发明名称 |
PUMP JACK FOR SLANT WELLS |
摘要 |
<p>"PUMP JACK FOR SLANT WELLS" The pump jack is of conventional API front-mounted geometry Class III configuration, but is provided with an angularly disposed walking beam, so as to be able to pump a slant rod string. To incorporate versatility into the unit so that a single model can be used with different wells having different angularities, there is provided: means for altering the effective length of the Pitman arms (so that the angularity of the walking beam is changed, which permits the unit to be used with a rod string having a different slant); means for bringing the counterweight into phase with the well load; and means for altering the stroke length.</p> |
申请公布号 |
CA1201327(A) |
申请公布日期 |
1986.03.04 |
申请号 |
CA19830422872 |
申请日期 |
1983.03.04 |
申请人 |
UNIVERSAL INDUSTRIES LTD. |
发明人 |
HAVERSTOCK, WAYNE;KRYWCHUK, DAVID;MASAK, PETER |
分类号 |
F04B47/02;(IPC1-7):F04B47/02 |
主分类号 |
F04B47/02 |
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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