Water-based high temperature well servicing composition and meth

Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component

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Details

507925, 507214, 507906, 507225, C09K 700

Patent

active

056209479

ABSTRACT:
A water-based well completion and workover fluid is disclosed which has improved rheological and filtration control properties at temperatures up to about 450.degree. F. The composition comprises a saturated brine solution, a sized-salt that is insoluble in the saturated brine solution, and a water-soluble filtration additive comprising a polymer produced from at least two monomers selected from the group consisting of 2-acrylamido-2-methylpropanesulfonate, acrylamide, and 2-vinylpyrrolidone.

REFERENCES:
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patent: 4422947 (1983-12-01), Dorsey et al.
patent: 4547299 (1985-10-01), Lucas
patent: 4621692 (1986-11-01), Mondshine
patent: 4629575 (1986-12-01), Weibel
patent: 5008025 (1991-04-01), Hen
patent: 5080809 (1992-01-01), Stahl et al.
patent: 5179076 (1993-01-01), Elward-Berry
patent: 5244877 (1993-09-01), Elward-Berry
Unique Completion Fluid Suits Horizontal Wells, by Jay Dobson and T. C. Mondshine, Petroleum Engineer International, Sep., 1990.
Cellulon Fiber Specification, Copyright 1990 by Weyerhaeuser Company.
Rheological Characteristics of Reticulated Bacterial Cellulose as a Perfomance Additive to Fracturing and Drilling Fluids, by J. A. Westland and D. A. Lenk, Society of Petroleum Engineers, SPE 25204. 1993.
New Polymer Improves Water-Soluble Completion Fluids, by T. C. Mondshine, Petroleum Engineer International, Feb. 1989.

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