[특허]Apparatus and method for down-hole EM telemetry while drilling

Apparatus and method for down-hole EM telemetry while drilling 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01V-001/00 G01V-003/10
출원번호	US-0838639 (1986-03-06)
발명자 / 주소	MacLeod Norman C. (Sunnyvale CA)
출원인 / 주소	MacLeod Laboratories, Inc. (Menlo Park CA 02)
인용정보	피인용 횟수 : 133 인용 특허 : 0

초록 ▼

An MWD EM data/control telemetry link between down-hole instruments and ground surface instruments dynamically adapts to the underground electrical environment utilizing a down-hole microprocessor unit and a surface data processing unit (computer) each of which continuously monitors, probes and sweeps the frequency spectrum with EM signals to determine an optimum frequency for signal transmission between the respective units via either the drill string, the surrounding strata, or both, and then generates and digitally modulates a carrier signal at such optimum frequency with data/control signals. A particular feature of the communication system is a combination of a sensing toroid and insulated gaps interrupting electrical continuity so as to force all currents propagating in the strata and pipe string to flow through the axial opening of the sensing toroid via a conduction path dictated by considerations of electrical design rather than by mechanical constraints, thus enabling the effective electrical length of the drill string below the down-hole module to be optimized.

대표청구항 ▼

A method for communicating data from down-hole sensing devices contained in a down-hole module incorporated into a conductive drill string to ground surface comprising the steps of: (a) generating a first alternating electromagnetic (EM) transmission current in the drill string and underground strata with an electrical current generator disposed within the module; (b) detecting the frequency of said generated first EM transmission current that produces a particular EM transmission current level at ground surface; (c) setting said electrical current generator to generate a second EM transmission current at the detected frequency; (d) converting analogue data signals developed by said down-hole sensing devices into digital electrical data signals; (e) inputting said digital data signals into a down-hole microprocessor means located in the down-hole module, and logically operating on said digital data signals according to a first program stored in a first programmable read only memory (PROM), a first random access memory (RAM), and a first electrically erasable programmable read only memory (EEPROM) to convert such digital signals into digital transmission data signals; (f) modulating said second EM transmission current with said digital transmission data signals; (g) detecting the modulated second EM transmission current at ground surface; (h) converting the detected modulated second EM transmission current into a digital data string; (i) inputting said first digital data string into a surface data processor means and logically operating on said digital data string according to a second program stored in a second programmable read only memory (PROM), a second random access memory (RAM) and a second electrically erasable programmable read only memory (EEPROM) to convert said digital data string into analogue data signals reflecting conditions of the down-hole strata detected by said down-hole sensing devices.

이 특허를 인용한 특허 (133)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
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Apparatus and method for down-hole EM telemetry while drilling 원문보기

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Apparatus and method for down-hole EM telemetry while drilling 원문보기

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