[특허]Method and apparatus for dual string well tree isolation

[미국특허] Method and apparatus for dual string well tree isolation 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E21B-033/047
출원번호	US-0268460 (1999-03-16)
발명자 / 주소	Dallas L. Murray
대리인 / 주소	Nelson Mullins Riley & Scarborough, LLP
인용정보	피인용 횟수 : 59 인용 특허 : 6

초록 ▼

A dual string well tree isolation apparatus includes two assemblies each having a high pressure valve and a high pressure tubing which are respectively inserted into the vertical passage of a dual string well tree, and a swedge for connection to the dual string well tree for supporting one of the assemblies. The swedge vertically offsets one assembly from the other. The apparatus further includes a hydraulic cylinder for inserting the high pressure tubings and cylinder support rods for removable attachment of the hydraulic cylinder to the dual string well tree. The hydraulic cylinder and the support rods are removed after each insertion of a high pressure tubing into a respective vertical passage to provide easy access to the high pressure valve of each assembly. The advantage is a safe, economical apparatus for simultaneous stimulation of a dual string well completion.

대표청구항 ▼

[ I claim:] [1.] An apparatus for injecting fluids, gases, solid particles or mixtures thereof into a well having first and second production tubing strings, the fluids being injected through a dual string well tree which has first and second vertical passages therethrough respectively aligned with the first and second production tubing string and has at least one valve for selectively closing each passage, the apparatus comprising:a first and a second isolation assembly, each having a high pressure tubing for insertion through the respective first and second vertical passages to isolate the fluids, gases, solid particles or mixtures injected therethrough from an interior of each of the vertical passages;a swedge having an axial passage adapted to be detachably mounted to the dual string well tree in sealed alignment with one of the vertical passages, the swedge having a top end adapted to support one of the assemblies to vertically offset the one assembly from the other.

이 특허에 인용된 특허 (6) 인용/피인용 타임라인 분석

Mitchell Morton Lindsay,CAX ITX T0L 1T5 ; Mitchell Bryson James,CAX ITX T0J 2P0 ; Mitchell Blair Orvel,CAX ITX T0M 1T0, Dual string assembly for gas wells.
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Wright Andrew,CAX ; Ring Curtis Phillip,CAX, Dual tubing string hanging apparatus.
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McLeod Roderick D. (5104 125th St. Edmonton ; Alberta CAX T6H 3V5), Insertion drive system for tree savers.
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Bullen Ronald S. (98 Willow Park Green ; SE. Calgary ; Alberta CAX), Well tree saver.
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McLeod Roderick D. (5104-125 St. Edmonton ; Alberta CAX T6H 3V5), Wellhead isolation tool.
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Garner Jonathan W. (1120 Hunterston Hill NW. Calgary ; AB CAX T2K 4N8) Dallas L. Murray (524 Oakwood Place ; SW. Calgary ; Alberta CAX T2V 0K3), Wellhead isolation tool and setting and method of using same.
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이 특허를 인용한 특허 (59) 인용/피인용 타임라인 분석

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[미국특허] Method and apparatus for dual string well tree isolation 원문보기