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[미국특허] Well casing flotation device and method 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • E21B-033/10
출원번호 US-0820997 (1992-02-10)
발명자 / 주소
  • Mueller Mark D. (Santa Maria CA) Jones Frank L. (Balikpapan CA IDX) Quintana Julio M. (Bakersfield CA) Ruddy Kenneth E. (Houston TX) Mims Michael G. (Bakersfield CA)
출원인 / 주소
  • Union Oil Company of California (Los Angeles CA 02)
인용정보 피인용 횟수 : 222  인용 특허 : 0

초록 ▼

A ported float shoe (5) and a landing collar (16) are attached at a first end of a portion of a casing string (4) and a sliding air trapping insert (20) is attached at the other end. The air trapping insert (20) includes a fluid flow passageway (24) blocked by a plug (22) attached by shear pins to t

대표청구항 ▼

A process useful in installing a duct segment within an underground hole which contains a first fluid and extends underground from at least a near surface position to at least a shallow underground position, said process comprising: inserting said duct into said hole, said duct having a flotation ch

이 특허를 인용한 특허 (222) 인용/피인용 타임라인 분석

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