Well drilling and servicing fluids and methods of increasing...

Details Well drilling and servicing fluids and methods of increasing... Well drilling and servicing fluids and methods of increasing...

C - Chemistry, Metallurgy

09

K

C09K 8/90 (2006.01) C09K 8/08 (2006.01) E21B 7/00 (2006.01)

Patent

CA 2239585

A well drilling and servicing fluid comprising a brine having dissolved therein a formate salt selected from the group consisting of potassium formate, cesium formate, and mixtures thereof, a biopolymer viscosifier, and a pre-gelatinized amylopectin derivative, and optionally a bridging agent and magnesium oxide. The amylopectin starch derivative is a crosslinked amylopectin starch (waxy) which has been crosslinked to the extent that the viscosity of an aqueous amylopectin starch suspension undergoing crosslinking is within about 25% to about 60%, preferably from about 25% to less than about 50%, of the maximum viscosity which can be obtained, and gelatinized. A process of increasing the low shear rate viscosity at ambient temperatures of the aqueous formate brine which comprises adding to the brine a biopolymer and the pre- gelatinized crosslinked amylopectin starch in amounts such that they interact to synergistically increase the low shear rate viscosity of the brine.

Affiliated with

Also associated with

Rating

Well drilling and servicing fluids and methods of increasing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Well drilling and servicing fluids and methods of increasing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Well drilling and servicing fluids and methods of increasing... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1669874