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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0567006 (1983-12-30) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 5 인용 특허 : 1 |
An oil pump assembly having an adjustable production rate and capable of long stroke, low stroke per minute pumping rates, comprising a reciprocating pumping rod in a well hole, a counterbalancing mechanism for reducing the power needed to pump oil by the pumping rod, a driving mechanism to drive th
An oil well pump assembly including means for pumping oil from an oil well through a well hole comprising a pumping rod and means for reciprocating said pumping rod in said well hole, counterbalance means for reducing the power needed to pump said oil, motor means, means for driving said reciprocati
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