US 7,550,411 B2
	Subterranean treatment fluids comprising polyoxazoline compositions and methods of use in subterranean formations
Stephen A. Bell, Houston, Tex. (US)
Assigned to Halliburton Energy Services, Inc., Duncan, Okla. (US)
Filed on Jan. 10, 2007, as Appl. No. 11/652,311.
Application 11/652311 is a division of application No. 10/916281, filed on Aug. 11, 2004, granted, now 7,178,610.
Prior Publication US 2007/0111895 A1, May 17, 2007
Int. Cl. C09K 8/22 (2006.01); C09K 8/24 (2006.01); E21B 21/00 (2006.01)

U.S. Cl. 507—117  [175/65; 507/103; 507/113]

19 Claims

1. A drilling fluid for use in drilling a well in a subterranean formation comprising an aqueous fluid, a polyoxazoline composition and at least one selected from the following group: a weighting agent, a salt, a shale-inhibiting component, a viscosifier, a filtration control agent, a pH control agent, an emulsifier, a bridging agent, and a combination thereof.