Aqueous well-drilling fluids

Details Aqueous well-drilling fluids Aqueous well-drilling fluids

C - Chemistry, Metallurgy

09

K

31/9

C09K 8/14 (2006.01)

Patent

CA 1130549

L-1644 TITLE: AQUEOUS WELL-DRILLING FLUIDS INVENTORS: John (NMI) Bretz and Leonard Stephen Cech ABSTRACT OF THE DISCLOSURE: Aqueous well-drilling fluids treated with addi- tives comprising a non-Newtonian colloidal disperse system containing metal-containing particles, a dispersing medium and an organic compound having both a hydrophobic and a polar substituent in combination with at least one emulsi- fier are disclosed. Specific examples of the disperse system comprise calcium carbonate particles predispersed in a mineral oil dispersing medium in the presence of a calcium petrosulfonate; useful emulsifiers include alkylene oxide/ fatty amine condensates. Well-drilling fluids containing such additives reduce the torque requirements in rotary drilling operations.

333020

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