C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/16 (2006.01) C09K 3/00 (2006.01) C09K 8/08 (2006.01)
Patent
CA 2141078
The invention provides methods for (1) reducing the fluid loss of and (2) reducing the concentration of polymer required to provide a desired degree of fluid loss control to, a well drilling and servicing fluid which contains at least one polymeric viscosifier, at least one polymeric fluid loss control additive, and a water soluble bridging agent suspended in an a liquid in which the bridging agent is not soluble, the methods comprising adding to the fluids a particulate, water soluble, ultra fine filtrate reducing agent having a particle size distribution such that at least 90% of the particles thereof are less than 10 micrometers and the average particle size is from about 3 to about 5 micrometers, the ultra fine filtrate reducing agent being insoluble in the liquid.
Dobson James W. Jr.
Harrison Jesse C. III
Kayga Paul D.
Dobson James W. Jr.
Harrison Jesse C. III
Kayga Paul D.
Kirby Eades Gale Baker
Texas United Chemical Company Llc
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