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发明名称
AUTOMATIC TUBING DRAIN
摘要
An automatic tubing drain for rotary pumps automatically closes when the pump starts and opens when the pump stops using reactive torque generated by the pump.
申请公布号
WO2014075160(A1)
申请公布日期
2014.05.22
申请号
WO2012CA01030
申请日期
2012.11.13
申请人
WRIGHT, ANDREW
发明人
WRIGHT, ANDREW
分类号
E21B34/12;E21B43/12;F16K5/04
主分类号
E21B34/12
代理机构
代理人
主权项
地址
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