[특허]Down hole drilling tool control mechanism

Down hole drilling tool control mechanism 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E21B-017/10
출원번호	US-0804114 (1991-12-06)
우선권정보	CA-2032022 (1990-12-12)
발명자 / 주소	Lee Paul (Suite 1650 736 - 6th Avenue S.W. Calgary Alberta CAX T2P 3T7)
인용정보	피인용 횟수 : 51 인용 특허 : 0

초록 ▼

A down hole drilling tool activating mechanism comprising a drill string sub connectable between adjacent lengths of drill string pipe which provides a hollow housing with a central bore, a mandrel having a central bore positioned within the bore of said drill sub and moveable longitudinally within said sub bore between a deactivated position and an activated position and the reverse, said mandrel having a first portion of large diameter exposed to pressure in the central bore upstream from said mandrel and a second portion having a smaller diameter than said first portion exposed to pressure in said bore downstream from said mandrel, and having a seal between the small diameter portion and the bore of said drill sub to isolate said large diameter portion from pressure downstream of said mandrel. Spring means is located between the small diameter of the mandrel and the wall of the drill sub tending to urge the mandrel in a first position against the pressure on said large diameter portion. A ring is provided in sealed relationship between the mandrel and the drill sub having a check valve set to predetermine the minimum pressure at which fluid will flow there through and controlling the pressure exerted on the large diameter portion of the mandrel. A second check valve determines a pressure at which fluid may flow in the opposite direction under pressure from the spring bias means. The mandrel has cam means adapted to engage follower means to control activation and deactivation of the tool.

대표청구항 ▼

A down hole drilling tool activating mechanism for use in a string of drill type having drilling fluid flowing therethrough and comprising: a drill sub having ends respectively connectable to adjacent lengths of drill pipe, and having a housing rigidly extending between said ends with a central bore therein to convey drilling fluid; a mandrel having a central bore to conduct drilling fluids positioned within said drill sub bore and reversibly movable longitudinally therein between a deactivated position and an activated position, in response to drilling fluid pressure; said mandrel having a firs end of large diameter exposed to drilling fluid pressure in said drill sub bore at the upstream end of said mandrel, and having a second end of reduced diameter smaller than said larger diameter exposed to drilling fluid pressure in said drill sub bore at the downstream end of said mandrel; seal means positioned between said mandrel and said drill sub housing bore to isolate said large diameter end of said mandrel against drilling fluid pressure from the downstream end of said mandrel.

이 특허를 인용한 특허 (51)

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Laing, Robert A.; Ireland, Kelly D.; Gautam, Anurag; Radford, Steven R., Expandable apparatus and related methods.
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Radford, Steven R.; Oesterberg, Marcus; Trinh, Khoi Q.; Miller, Timothy; Anandampillai, Shyam; Jurica, Chad T.; Herberg, Wolfgang Eduard; Haubold, Carsten; Jakubeit, Christopher; Wiegmann, Michael; Behnsen, Jens; Faber, Hans-Juergen, Expandable reamer assemblies, bottom-hole assemblies, and related methods.
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Radford, Steven R.; Shu, Scott Shiqiang; Shale, Les T.; Morris, Mark E.; Kizziar, Mark R.; Zahradnik, Anton F., Expandable reamer tools.
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Radford, Steven R.; Miller, Timothy; Oesterberg, Marcus, Expandable reamers and methods of using expandable reamers.
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Radford, Steven R.; Miller, Timothy; Oesterberg, Marcus, Expandable reamers and methods of using expandable reamers.
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Poteet, III, Carl E., Expandable reamers having nonlinearly expandable blades, and related methods.
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Poteet, III, Carl E., Expandable reamers having sliding and rotating expandable blades, and related methods.
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Meister, Matthias; Herberg, Wolfgang E.; Bothmann, Gunnar; Treviranus, Joachim; Freyer, Carsten; Oppelaar, Hans-Robert, Hole enlargement drilling device and methods for using same.
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Meister, Matthias; Herberg, Wolfgang Eduard; Bothman, Gunnar; Treviranus, Joachim; Freyer, Carsten; Oppelaar, Hans-Robert, Hole enlargement drilling device and methods for using same.
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Oesterberg, Marcus; Enterline, James D., Methods of forming earth-boring tools utilizing expandable reamer blades.
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Radford, Steven R.; Oesterberg, Marcus; Gentry, S. Richard, Selectively actuating expandable reamers and related methods.
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Maury Vincent,FRX ; Guerin Jean-Claude,FRX, Stabilizer-reamer for drilling an oil well.
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Radford, Steven R.; Trinh, Khoi Q., Status indicators for use in earth-boring tools having expandable members and methods of making and using such status indicators and earth-boring tools.
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Radford, Steven R.; Trinh, Khoi Q.; Gentry, S. Richard, Tools for use in subterranean boreholes having expandable members and related methods.
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