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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
|
출원번호 | US-0002140 (1993-01-11) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 84 인용 특허 : 0 |
An improved rotary blowout preventer having a rotary housing rotably mounted within an outer housing and carrying an annular packer assembly hydraulically actuated by fluid circulated through the outer housing by hydraulic pumps. An annular adapter is detachably and reattachably connected to an uppe
A quick change packer assembly for use in a rotary blowout preventer having a rotary housing rotably mounted within an outer housing for rotational movement about a vertical axis, comprising: (a) an annular adapter received within and detachably and reattachably connected to said rotary housing for
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