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BOP with partially equalized ram shafts

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • E21B-033/06
출원번호 US-0769160 (1996-12-18)
발명자 / 주소
  • Levett Bryce A.
  • Nicholson Mike C.
출원인 / 주소
  • Varco Shaffer, Inc.
대리인 / 주소
    Browning Bushman
인용정보 피인용 횟수 : 93  인용 특허 : 14

초록

A hydraulically controlled ram assembly 12 for an oilwell blowout preventer 10 effects the opening and closing of a ram block 30 interconnected with a piston 34. The piston 34 is movable within the ram housing 22 in response to a hydraulic pressure to seal the ram block 30 with an oilfield tubular.

대표청구항

[ What is claimed is:] [1.] A hydraulically actuated blowout preventer for engagement with an oilfield tubular, comprising:a BOP body having a central passageway for receiving the oilfield tubular and radially opposing chambers extending radially outward from the central passageway, the central pass

이 특허에 인용된 특허 (14)

  1. Hardgrave William D. (Carrolton TX), Actuator for wireline blowout preventer.
  2. Olson ; Richard A., Blowout preventer ram lock.
  3. Whitby Melvyn F. (Houston TX) Sklenka Frank L. (Kingwood TX) O\Donnell David L. (Houston TX), Blowout preventer with ram wedge locks.
  4. Peil Archie W. (Houston TX) Bishop Thomas R. (Houston TX), Fail-safe blowout preventer.
  5. Jones Marvin R. (Houston TX), Flow controlling apparatus.
  6. Jones Marvin R. (Houston TX), Hydraulically operated valves.
  7. Jones Marvin R. (Houston TX), Hydraulically operated valves.
  8. Davis Glenn R. (Euless TX), Manual blowout preventer with invertible rams.
  9. Whitby Melvyn F. (Houston TX) O\Donnell David L. (Houston TX), Oilfield tubular shear ram and method for blowout prevention.
  10. Howard ; Jr. Roland M. (Houston TX), Ram type blowout preventers.
  11. Helfer Paul E. (7810 Moonmist Houston TX 77036) Jones Marvin R. (414 Flintdale Rd. Houston TX 77024), Ram-type blowout preventer.
  12. Jones Marvin R. (414 Flintdale Houston TX 77024), Valve apparatus.
  13. Jones Marvin R. (Houston TX) Helfer Paul E. (Houston TX), Valve apparatus.
  14. Jones Marvin R. (Houston TX), Valves.

이 특허를 인용한 특허 (93)

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