[특허]Apparatus and method for completing/recompleting production wells

Apparatus and method for completing/recompleting production wells 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E21B-019/00
출원번호	US-0328144 (1994-10-21)
발명자 / 주소	Dallas L. Murray (801 New England Ct. Allen TX 75002)
인용정보	피인용 횟수 : 33 인용 특허 : 0

초록 ▼

An apparatus and method for completing or recompleting wells for production is disclosed. The apparatus and method are particularly adapted to the completion of oil or gas wells having a plurality of production zones. In particular, the apparatus is useful for oil or gas wells having production zones which require stimulation prior to initial production of the well, or producing wells which require recompletion in order to open new zones or to reperforate and stimulate existing zones from which production has slowed down or ceased. The apparatus comprises a header spool having a pressure rating that is about as high as the burst pressure rating of the surface casing of the well. The header spool is mounted to a casing spool before a wellhead is placed on the well. The header spool has an internal passage which is at least as large as the diameter of the casing in the well. This permits an efficient completion of the well after the casing is cemented in. The apparatus in accordance with the invention permits the unobstructed use of a full range of tools including casing perforation tools, blowout preventers, casing plugs, logging tools, fishing tools, and other apparatus required in the completion of a well for production. The method for completing wells involves installing a header spool in accordance with the invention on the well before a wellhead is installed and performing the steps required to perforate the casing and stimulate or fracture the zones requiring treatment in order to prepare the well for production before wellhead equipment is installed. This method and apparatus permits a well to be completed at a significantly less cost than for completing a multi-zone well in the traditional manner of completing after the wellhead equipment is installed.

대표청구항 ▼

Apparatus for completing or recompleting oil and gas wells for production, comprising: a header spool for sealingly engaging an outer perimeter of a dressed top end of a casing in the well, the header spool having an upper end, a lower end, a pressure rating which is at least about equal to a burst pressure rating of the casing, and a passage which extends between the upper end and the lower end, the passage having a diameter which is at least equal to an inner diameter of the casing; the upper end being adapted to accommodate means for providing a fluid tight attachment of a high pressure valve for controlling a flow of liquids and gases through the axial passage; the lower end including an annular recess that is coaxial with the axial passage and extends upwardly from the lower end, the annular recess being adapted to accommodate packing for providing a fluid seal between an outer surface of the casing and the header spool when the header spool is installed on the casing in the well, the packing being adapted to provide a fluid seal having a pressure rating which is at least about equal to a burst pressure rating of the casing; a retainer means for retaining the packing in the annular recess, the retainer means and the packing being adapted to slide over the casing while the packing is in a fluid sealing position so that the fluid seal is provided when the retainer means and the packing are slid over the casing; the lower end further including a flange adapted for connection to a surface casing spool of the well, the flange being adapted to accommodate means for providing a fluid seal between the header spool and the surface casing spool; and a pressure test port which extends through the lower end of the header spool in an area located between the annular recess and the flange, whereby the pressure test port may be monitored to ensure that pressurized fluids do not pass between the packing and the well casing or the packing and the header spool during a well completion or a well recompletion operation.

이 특허를 인용한 특허 (33)

Dallas L. Murray, Apparatus for increasing the flow of production stimulation fluids through a wellhead.
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McGuire,Bob; Dallas,L. Murray, Blast joint swivel for wellhead isolation tool and method of using same.
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McGuire, Bob, Casing mandrel for facilitating well completion, re-completion or workover.
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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; 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; 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, Configurable wellhead system with permanent fracturing spool and method of use.
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Dallas, L. Murray, Configurable wellhead system with permanent fracturing spool 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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McGuire, Bob, Erosion resistant frac head.
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McGuire, Bob, Erosion resistant frac head.
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McGuire, Bob, Erosion resistant frac head.
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Dallas, L. Murray; McGuire, Bob, Hybrid wellhead system and method of use.
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Dallas, L. Murray; McGuire, Bob, Hybrid wellhead system and method of use.
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Dallas,L. Murray; McGuire,Bob, Hybrid wellhead system and method of use.
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McGuire,Bob; Dallas,L. Murray, Hybrid wellhead system and method of use.
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Dallas L. Murray, Lockdown mechanism for well tools requiring fixed-point packoff.
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Dallas, L. Murray, Reciprocating lubricator.
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Udipi, Mahesha; Olvera, Alfredo; Hwang, Jim; Brunjes, Jean; Borak, Jr., Eugene A., Reinforced frac tubing head.
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Starr, Phillip M.; Folds, Don S.; Stepp, Lee Wayne, Screw-driven wellhead isolation tool.
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Dallas, L. Murray, Spool for pressure containment used in rigless well completion, re-completion, servicing or workover.
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McGuire, Bob; Dallas, L. Murray, System and method for low-pressure well completion.
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McGuire,Bob; Dallas,L. Murray, System and method for low-pressure well completion.
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Duhn, Rex E.; Meek, Robert K., Wellhead isolation tool.
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Duhn, Rex E.; Meek, Robert K., Wellhead isolation tool and method of fracturing a well.
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Duhn,Rex E.; Meek,Robert K., Wellhead isolation tool and method of fracturing a well.
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Duhn,Rex E.; Meek,Robert K., Wellhead isolation tool and method of fracturing a well.
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Duhn, Rex E.; Meek, Robert K., Wellhead isolation tool and wellhead assembly incorporating the same.
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Duhn, Rex E.; Meek, Robert K., Wellhead isolation tool and wellhead assembly incorporating the same.
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Duhn, Rex E.; Meek, Robert K., Wellhead isolation tool and wellhead assembly incorporating the same.
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Duhn, Rex E.; Meek, Robert K., Wellhead isolation tool and wellhead assembly incorporating the same.
상세보기
Duhn,Rex E.; Meek,Robert K., Wellhead isolation tool, wellhead assembly incorporating the same, and method of fracturing a well.
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