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Composition and method of controlling lost circulation from wellbores

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • C09K-007/00
  • C09K-007/02
출원번호 US-0095638 (1987-09-14)
발명자 / 주소
  • Alexander William (Naperville IL)
출원인 / 주소
  • American Colloid Company (Arlington Heights IL 02)
인용정보 피인용 횟수 : 136  인용 특허 : 7

초록

A method and composition for controlling the lost circulation of drilling mud in a wellbore during a drilling operation comprising the introduction of a pelletized composition, comprising a water-insoluble, water-absorbent polymer and bentonite, in a weight ratio of water-absorbent polymer to benton

대표청구항

A composition for preventing and/or counteracting the lost circulation of a drilling mud comprising pellets of a homogeneous mixture of a water-swellable bentonite and a water-insoluble, water-absorbent cross-linked polyacrylate, wherein the weight ratio of the bentonite to the water-absorbent polym

이 특허에 인용된 특허 (7)

  1. Walker Clarence O. (Richmond TX), Encapsulated water absorbent polymers as lost circulation additives for aqueous drilling fluids.
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  7. Alexander William (Naperville IL) Regan Barbara R. (Glenview IL) Anderson Mark (Wheaton IL), Water absorbent styrene-acrylic acid copolymers.

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