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다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0264445 (1988-10-28) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 320 인용 특허 : 0 |
A directional drilling downhole steering and survey tool for detecting ferromagnetic bodies from an off vertical borehole, transmitting the signals from the downhole sensors to surface equipment while drilling, and for calculation of the range and direction to the detected ferromagnetic body for the
A directional drilling downhole steering and survey tool for detecting ferromagnetic bodies from an off vertical borehole, transmitting the signals from the downhole sensors to surface equipment while drilling, and for calculation of the range and direction to the detected ferromagnetic body for the use of the directional driller in intercepting or avoiding the ferromagnetic body. In combination with the steering and range and direction to ferromagnetic body capabilities, the downhole tool may also include sensors for detecting formation bed interface, apparatus for electric or gamma ray or radioactive logging, neutron density sensor apparatus and other formation evaluation or correlation apparatus. The downhole tools may be packaged in either an electric line transmitted tool of MWD transmitted tool.
A system for guiding and drilling a subterranean borehole to intercept a subterranean ferromagnetic body exhibiting target magnetic field comprising: (1) a subsurface tool comprising a non-magnetic housing, a first sensing means within said housing for continuously measuring the earth\s gravity fiel
A system for guiding and drilling a subterranean borehole to intercept a subterranean ferromagnetic body exhibiting target magnetic field comprising: (1) a subsurface tool comprising a non-magnetic housing, a first sensing means within said housing for continuously measuring the earth\s gravity field, a second sensing means within said housing for continuously measuring the components of a magnetic field along mutually orthogonal axes simultaneously at two locations in said borehole; said tool further comprising means for transferring electrical current from a location inside said drill string into the earth formation being drilled, said tool being installed in a drill string proximate a drill collar wherein said means for transferring electrical current from an electrical supply conductor comprises: (a) at least one current conducting pin extending through and electrically insulated from said drill string; (b) formation contactor means extending from said current conducting pin for electrically transmitting current into the wall of the borehole drilled; and (c) guide and latch means comprising a pair of elongated guide legs formed at a juncture with a pin latch receptacle depending downwardly from said guide leg juncture, said guide and latch means being connected to said electrical supply conductor and supported by said wireline and being disposed to establish guiding and releasable latching relation with said current conducting pin as said guide and latch means is moved downwardly by said wireline; (2) transmission and receiving means mounted in said housing and operatively connected to first and second sensing means for transmitting said gravity and magnetic field measurements to the surface while drilling and for receiving guidance control information transmitted to said tool; and (3) surface equipment in communication with said housing transmission and receiving means comprising processing means for continuously calculating azimuth and inclination of said borehole and position of said borehole relative to said subterranean body using the measurements of said first and said second sensing means.
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