Non-poluting anti-stick water-base drilling fluid modifier and method of use

Patent 5120708 Issued on June 9, 1992. Estimated Expiration Date:

March 6, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2812161

3223622

3528914

3682187

3718585

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3788406

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3901316

Cationic bituminous emulsions
Patent #: 3957524
Issued on: 05/18/1976
Inventor: Doughty , et al.

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Inventors

Assignee

Baker Hughes Incorporated

Application

No. 665294 filed on 03/06/1991

US Classes:

507/126, Organic component is asphalt or a component or derivative thereof106/277, Bituminous emulsion166/301, Freeing stuck object, grappling or fishing in well175/72, Prevention of lost circulation or caving507/136, Organic component contains ether linkage (e.g., PEG ether, etc.)508/579, Ethers516/51, The compound contains repeating -(OCnH2n)- (i.e., repeating unsubstituted oxyalkylene)516/52, The agent contains specified solid non-bituminous particulate (e.g., clay)516/204The agent contains organic compound containing oxygen (e.g., carboxylic acid ester)

Examiners

Primary: Maples, John S.
Assistant: Sayala, C.

Attorney, Agent or Firm

Burgess; Tim L.

International Class

C09K 007/02

Abstract

A water-based drilling fluid additive composition comprising a water soluble polyoxyalkylene compound selected from polyoxyalkylene glycols, monoalkylethers of polyoxyalkylene glycols, and mixtures thereof, which have a cloud point in the range from about 60° F. to about 180° F., in combination with a water dispersible particulate asphalt having an ASTM D-36 softening point of at least 290° F., an ASTM D-5 penetration depth not exceeding about 10 mm, and a particulate size not exceeding more than about 10 percent retained on a 40 mesh U.S. screen.