04456537 is referenced by 10 patents and cites 21 patents.

A process for removing contaminating solids from high density, salt type aqueous drilling/completion/packer fluid prior to its introduction into a well bore. A small effective amount (e.g., 0.5% volume) of an aliphatic alcohol (e.g., n-hexanol) and a surface active chemical aid (e.g., bis hydroxy ethyl cetyl amine) are thoroughly intermixed into the fluid. After the solids agglomerate, the solids are separated from the fluid before introduction in a solids-free condition into the well bore. The fluid may have a density as high as 17 pounds per gallon and be a brine formed of the sodium, calcium or zinc salts with chloride or bromide anions.

Title
Chemically cleaning drilling/completion/packer brines
Application Number
6/310653
Publication Number
4456537
Application Date
October 13, 1981
Publication Date
June 26, 1984
Inventor
Arnold M Singer
1516 Sul Ross, Apt. #3, Houston, 77006
TX, US
John E Oliver Jr
3752 Del Monte, Houston, 77019
TX, US
Agent
Vaden Eickenroht Thompson Bednar & Jamison
IPC
C09K 7/02
E21B 43/00
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