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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0553529 (1983-11-21) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 40 인용 특허 : 4 |
There is disclosed a ram-type blowout preventer having shear rams and fluid operated actuators for the shear rams which are of such construction as to move the rams inwardly to shear a pipe with a first, relatively large force, and then further inwardly to close the rams with a second, relatively sm
A blowout preventer, comprising a housing having a bore therethrough and chambers therein intersecting the bore, a ram movable inwardly and outwardly within each chamber toward and away from the other ram or rams, said rams having cutting edges on their inner ends which cooperate with one another to
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