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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0906669 (1992-06-30) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 154 인용 특허 : 0 |
An artificial lifting system is designed for use at a pumping installation which has a pump drive at the surface or head end of a well and a reciprocating pump positioned in the lower end of the well. The artificial lifting system has a tubing string connected between the pump drive and the pump for
An artificial lifting system for extracting oil and the like from an underground source, the lifting system being designed for use at a pumping installation having pump drive means at the head of a well and a pump with a reciprocable member secured in the lower end of the well, the improvement compr
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