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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0097526 (1979-11-26) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 8 인용 특허 : 1 |
A device for pulling a submersible pump from a well casing comprises a pair of spaced, parallel legs adapted to straddle the rim of the casing and be clamped thereto by upper and lower clamps. A submersible pump in the well may be pulled by operating a winch mounted at the upper end of the device.
A device for pulling a submersible pump from a well casing in which it is suspended by a cable, said device comprising a pair of rails, one of which is longer than the other; a threaded bolt, spacer and wing-nut assembly connecting the upper end of the shorter rail to the longer rail at a point spac
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