Method of decreasing lost circulation during well operations...

Details Method of decreasing lost circulation during well operations... Method of decreasing lost circulation during well operations...

2007-11-20

2007-11-20

Buttner, David J. (Department: 1712)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S269000, C166S294000, C175S072000

Reexamination Certificate

active

11092085

ABSTRACT:
The invention discloses an additive for weighted aqueous slurries to reduce lost circulation during well drilling operations, a method of preparing the additive, and a method of reducing lost circulation utilizing the additive. The additive comprises a hardenable alkaline composition comprising mixtures of diatomaceous earth, finely ground paper, a hydrophobic liquid, micronized cellulose and lime. The hydrophobic liquid decreases the time required to prepare the weighted aqueous slurries, i.e., pills, containing the additive.

REFERENCES:
patent: 4369844 (1983-01-01), Clear
patent: 5147852 (1992-09-01), Cowan et al.
patent: 6016879 (2000-01-01), Burts, Jr.
patent: 2002/0128158 (2002-09-01), Green

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