[특허]Method for directional drilling of subterranean wells

Method for directional drilling of subterranean wells 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E21B-007/08
출원번호	US-0285081 (1988-12-16)
발명자 / 주소	Beimgraben Herbert W. (Houston TX)
출원인 / 주소	Baker Hughes Incorporated (Houston TX 02)
인용정보	피인용 횟수 : 46 인용 특허 : 0

초록 ▼

A method for directional drilling of a well with a motor and drill bit. A tubular housing is secured to the lower end of the motor with the housing having a first surface with an axis angularly disposed relative to the axis of the tubular housing. A second tubular housing has a surface engagable with the first surface and is angularly disposed relative to the axis of the second tubular housing with the extent of the engagement of the first and second surfaces determining the angular position of the axis of the second tubular housing relative to the axis of the first tubular housing. The extent of the engagment of the surfaces is selectively adjustable by shims. A first angular stabilizer is carried with a drill bit which is rotatably mounted with a drive means including universal joints. The apparatus is secured to a tubing string with a drill bit and lowered into the bore hole with the apparatus actuated by application of tubing weight with direction being controlled by rotation of the drill string.

대표청구항 ▼

Method for positioning a motor driven drilling bit relative to a well bore to control the direction of further drilling during directional and deviated drilling operations of a subterranean well, comprising the steps of: securing to a drill string an apparatus comprising a drill bit and, thereabove, a downhole motor having a housing supportable on the drill string and mounting a fluid motor driven by pressurized fluid supplied through the drill string; a first tubular housing having an upper end concentrically secured to the lower end of said motor housing; the lower end of said first tubular housing having a first surface form thereon having an axis angularly disposed relative to the axis of the first tubular housing; a second tubular housing having a second surface engagable with the first surface; said second surface being angularly disposed relative to the axis of said second tubular housing, whereby the extent of engagement of the first and second surfaces determines the angular position of the axis of said second tubular housing relative to the axis of the first tubular housing; means for selectively adjusting the extent of engagement of said first and second surfaces comprising a threaded connection between said surfaces and a selected number of shims inserted between the adjacent ends of said first and second surfaces; a third tubular housing concentrically secured to the lower end of said second tubular housing; the third tubular housing having an external surface that is eccentric relative to the bore axis of said third tubular housing; first angular stabilizer means rotationally adjustably mounted on said external surface; the first angular stabilizer having an external cylindrical surface that is eccentric relative to the external surface, whereby the lateral position of the first angular stabilizer may be selectively adjusted; means for rotatably mounting a drilling bit on the third tubular housing; drive means including universal joints, traversing the bores of the first, second and third tubular housings to operatively connect the fluid motor and the drill bit, and a second adjustable eccentric stabilizer secured to the exterior of the upper end of the motor housing; continuously actuating the fluid motor through said universal joints and applying a predeterminable weight on the drill bit; manipulating the apparatus within the well while weight is applied on the bit and the motor is actuated by rotating the drill string when the apparatus encounters straight portions, the drill string not being rotated when said drill string and said apparatus encounter deviated portions of said well, the axis of rotation of the bit being maintained at an angle to the axis of rotation of the housing during all phases of said directional drilling.

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Eppink, Jay M.; Odell, II, Albert C., Apparatus and method for drilling and reaming a borehole.
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Jay M. Eppink ; David E. Rios-Aleman ; Albert C. Odell, Drilling system utilizing eccentric adjustable diameter blade stabilizer and winged reamer.
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Schaaf, Stuart; Wernig, Marcus D., Drilling system, biasing mechanism and method for directionally drilling a borehole.
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Graham R. Watson ; Steven James Hart GB, Drillout bi-center bit.
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Downton,Geoff; Hart,Steven James; Rowatt,John David, Hybrid rotary steerable system.
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Adam, Mark, Large gauge concentric underreamer.
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Williams Michael P. ; Ehlers Ralph,DEX, Method and apparatus for navigational drilling with a downhole motor employing independent drill string and bottomhole a.
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Doster Michael L. ; Pessier Rudolf C. O. ; Schnell David M. ; McDonald Bart T., Reaming apparatus and method with enhanced stability and transition from pilot hole to enlarged bore diameter.
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Dorel Alain P. ; Chang Shu-Kong, Rotary steerable well drilling system utilizing hydraulic servo-loop.
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Dorel Alain P., Rotary steerable well drilling system utilizing sliding sleeve.
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Harvey, Peter R.; Woods, Michael J.; Krase, Steve J.; Burgess, Daniel E.; Wassell, Mark Ellsworth, Stabilizer for use in a drill string.
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Williams Michael P. ; Ehlers Ralph,DEX, Torque compensation apparatus for bottomhole assembly.
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Method for directional drilling of subterranean wells 원문보기

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