[특허]Downhole adjustable stabilizer and method

Downhole adjustable stabilizer and method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E21B-017/10 E21B-007/06
출원번호	US-0800441 (1991-11-27)
발명자 / 주소	Rosenhauch Irwin (Kingwood TX)
출원인 / 주소	Baroid Technology, Inc. (Houston TX 02)
인용정보	피인용 횟수 : 75 인용 특허 : 0

초록 ▼

A downhole adjustable stabilizer and method are disclosed for use in a well bore and along a drill string having a bit at the lower end thereof. A plurality of stabilizer blades are radially movable with respect to the stabilizer body, with outward movement of each stabilizer blade being in response to a radially movable piston positioned inwardly of a corresponding blade and subject to the pressure differential between the interior of the stabilizer and the well bore. A locking member is axially movable from an unlocked position to a locked position, such that the stabilizer blades may be locked in either their retracted or expanded positions. In the preferred embodiment of the invention, the stabilizer may be sequenced from a blade expanded position to a blade retracted position by turning on and off a mud pump at the surface. The stabilizer position may be detected by monitoring the back pressure of the mud at the surface, since the axial position of the locking sleeve preferably alters the flow restriction at the lower end of the stabilizer. High radially outward forces may be exerted on each stabilizer blade by one or more radially movable pistons responsive to the differential pressure across the stabilizer, and the stabilizer is highly reliable and has few force-transmitting components.

대표청구항 ▼

A downhole adjustable stabilizer for use in a well bore and along a drill string having a bit at the lower end thereof, the drill string having an interior flow path for passing pressurized fluid through the stabilizer and to the bit, the stabilizer comprising: a stabilizer body having an interior passage for fluid communication with the drill string interior flow path, the stabilizer body including an upper end for interconnection with an upper portion of the drill string, a lower end for interconnection to a lower portion of the drill string between the stabilizer and the bit, and an intermediate portion including one or more cavities spaced about the stabilizer body, each cavity defined at least in part by stabilizer body sidewalls; one or more stabilizer blades each received within a respective cavity in the stabilizer body, each stabilizer blade being radially movable with respect to the stabilizer body from a retracted position to an expanded position; one or more radially movable pistons each positioned inwardly of a corresponding one of the one or more stabilizer blades, each piston being radially movable from an inward position to an outward position in response to pressure differential between the interior flow path within the stabilizer body and the well bore exterior of the stabilizer, the radial movement of the one or more pistons functionally controlling the radial movement of the corresponding stabilizer blade; an axially movable locking sleeve positioned radially inward of the one of the one or more pistons and having a central flow path for transmitting pressurized fluid through the stabilizer body and movable within the stabilizer body from an unlocked position to a locked and retracted position for selectively fixing the radial position of at least one of the one or more pistons in its inward position when in the locked position, such that the fixed piston is prevented from radial outward movement in response to the pressure differential, thereby maintaining the corresponding stabilizer blade in its retracted position; the locking sleeve including at least one sleeve interlocking member; and at least one of the one or more pistons including a piston interlocking member for engagement with a corresponding sleeve interlocking member to interconnect the at least one piston and the locking sleeve and thereby limit radial outward movement of the corresponding stabilizer blade.

이 특허를 인용한 특허 (75)

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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
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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Downhole adjustable stabilizer and method 원문보기

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Downhole adjustable stabilizer and method 원문보기

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연구과제 타임라인

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이 특허를 인용한 특허 (75)

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