Patent ID: 9701881
Date: 2017-07-11
CPC Classifications: C04B,C09K

Claim:
1. A method for modifying or enhancing one or more properties of a drilling fluid for drilling a wellbore in a subterranean formation, preventing lost circulation during the drilling, and/or increasing bonding strength during cementing of the wellbore, the method comprising adding to the drilling fluid an additive consisting of an oil absorbent material and drilling with the drilling fluid, wherein the drilling fluid is an invert emulsion; and wherein the oil absorbent material is a polymer selected from the group consisting of: styrene butadiene acrylate, styrene butadiene acrylate carbonate, a polymer comprising phthalate, a polymer comprising a fluorinated ether block amide, and a polymer comprising a perfluorinated ether block amide.