[특허]Blowout preventer protector and method of using same

[미국특허] Blowout preventer protector and method of using same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E21B-033/068
출원번호	US-0493802 (2000-01-28)
발명자 / 주소	L. Murray Dallas
대리인 / 주소	Nelson Mullins Riley & Scarborough, LLP
인용정보	피인용 횟수 : 98 인용 특허 : 9

초록 ▼

A blowout preventer (BOP) protector is adapted to support a tubing string in a well bore so that the tubing string is directly accessible during a well treatment to stimulate production. The BOP protector includes a mandrel having an annular sealing body bonded to its bottom end for sealing engagement with a bit guide that protects a top of a casing of a well to be stimulated. The mandrel is connected at its top end to a fracturing head, including a central passage and radial passages in fluid communication with the central passage. The mandrel is locked in a fixed position by a lockdown mechanism that prevents upward movement induced by fluid pressures in the wellbore and downward movement induced by the weight of a tubing string supported at a top of the fracturing head by a tubing adapter. The advantages are that the BOP protector permits access to the tubing string during well treatment and enables an operator to move the tubing string up and down or run coil tubing into or out of the wellbore without removing the tool. This reduces operation costs, saves time and enables many new procedures that were previously impossible or impractical.

대표청구항 ▼

1. An apparatus for protecting a blowout preventer from exposure to fluid pressures, abrasives and corrosive fluids used in a well treatment to stimulate production and for supporting a tubing string in a wellbore so that the tubing string is accessible during the well treatment, the apparatus including a mandrel adapted to be inserted down through the blowout preventer to an operative position, the mandrel having a mandrel top end and a mandrel bottom end, the mandrel bottom end including an annular sealing body for sealing engagement with a bit guide at a top of a casing of the well when the mandrel is in the operative position, and, a base member adapted for connection to a wellhead, the base member including fluid seals through which the mandrel is reciprocally movable, comprising:a fracturing head including a central passage in fluid communication with the mandrel and at least one radial passage in fluid communication with the central passage; a tubing adapter mounted to a top end of the fracturing head, the tubing adapter supporting the tubing string while permitting fluid communication with the tubing string; and a lock mechanism for locking the apparatus in a fixed position to inhibit upward movement of the mandrel induced by fluid pressures in the wellbore and downward movement of the mandrel induced by a weight of the tubing string supported by the tubing adapter.

이 특허에 인용된 특허 (9) 인용/피인용 타임라인 분석

McLeod Roderick D. (5104 - 125 Street Edmonton ; Alberta CAX T6H 3V5), Annular and concentric flow wellhead isolation tool.
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McLeod Roderick D. (5104-125 Street Edmonton ; Alberta CAX T6H 3V5), Back pressure plug tool.
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Dallas L. Murray, Blowout preventer protector and method of using same during oil and gas well stimulation.
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Dallas L. Murray, Blowout preventer protector for use during high pressure oil/gas well stimulation.
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Dallas L. Murray, Lockdown mechanism for well tools requiring fixed-point packoff.
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McLeod Roderick D. (5104-125 Street Edmonton ; Alberta CAX T6H 3V5), Well casing packers.
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McLeod Roderick D. (5104-125 Street Edmonton ; Alberta CAX T6H 3V5), Wellhead isolation tool.
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Oliver ; Owen Norman, Wellhead isolation tool.
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McLeod Roderick D. (5104 - 125 Street Edmonton ; Alberta CAX), Wellhead isolation tool and method of use thereof.
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이 특허를 인용한 특허 (98) 인용/피인용 타임라인 분석

McLeod, Roderick D.; Johnson, Jerry A., Abrasion resistant frac head.
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Guidry, Kirk P., Adjustable fracturing head and manifold system.
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Guidry, Kirk P., Adjustable fracturing system.
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Guidry, Kirk P., Adjustable fracturing system.
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Guidry, Kirk P., Adjustable fracturing system.
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Guidry, Kirk P.; Cavanagh, James D.; Shirley, Brandon B., Adjustable fracturing system.
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Nguyen, Khang V.; Borak, Eugene Allen; Kajaria, Saurabh, Adjustable isolation sleeve assembly for well stimulation through production tubing.
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Dallas, L. Murray, Backpressure adapter pin and methods of use.
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Kwasniewski,Nathan; Farquharson,Keith David; McGuire,Bob; Whelan,John Henry, Casing adapter tool for well servicing.
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McGuire, Bob, Casing mandrel for facilitating well completion, re-completion or workover.
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Dallas,L. Murray; McGuire,Bob, Casing mandrel with well stimulation tool and tubing head spool for use with the casing mandrel.
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Dallas, L. Murray, Cup tool for high pressure mandrel.
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Tolman, Randy C.; Kofoed, Curtis, Device and method for injecting fluids into a wellbore.
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McGuire, Bob; Dallas, L. Murray, Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use.
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Wilkins, Danny R.; Holtkamp, Thomas H.; Smith, Jerry D., Drilling/frac adapter and method of use.
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Guidry, Kirk P., Fracturing fluid distribution systems and methods.
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Abel,Leo William, High pressure adapter assembly for use on blow out preventers.
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Abel,Leo William, High pressure adaptor assembly for use on blow out preventors.
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Conrad, Gregory A., Integral fracturing manifold.
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Bunney, Larry, Manifold device and method of use for accessing a casing annulus of a well.
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Lam, Tony M.; Schneider, Kevin Paul, Method and apparatus for isolating a wellhead for fracturing.
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Dallas, L. Murray, Method of subsurface lubrication to facilitate well completion, re-completion and workover.
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Conrad, Gregory A.; Lovin, James W., Modular fracturing system.
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Starr, Phillip M.; Folds, Don S.; Stepp, Lee Wayne, Screw-driven wellhead isolation tool.
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[미국특허] Blowout preventer protector and method of using same 원문보기

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