| US 7,488,704 B2 | ||
| Invert drilling fluids for use in drilling in subterranean formations | ||
| Jeff Kirsner, Humble, Tex. (US); Don Siems, Houston, Tex. (US); Kimberly Burrows-Lawson, Kingwood, Tex. (US); David Carbajal, Houston, Tex. (US); Ian Robb, Duncan, Okla. (US); and Dale E. Jamison, Humble, Tex. (US) | ||
| Assigned to Halliburton Energy Services, Inc., Duncan, Okla. (US) | ||
| Filed on Dec. 05, 2006, as Appl. No. 11/634,008. | ||
| Application 11/634008 is a continuation of application No. 10/292124, filed on Nov. 12, 2002. | ||
| Application 10/292124 is a continuation in part of application No. 10/175272, filed on Jun. 19, 2002, granted, now 6,887,832, filed on May 03, 2005. | ||
| Application 10/175272 is a continuation in part of application No. 09/929465, filed on Aug. 14, 2001, abandoned. | ||
| Application 09/929465 is a continuation in part of application No. PCT/US00/35609, filed on Dec. 29, 2000. | ||
| Application PCT/US00/35609 is a continuation in part of application No. PCT/US00/35610, filed on Dec. 29, 2000. | ||
| Prior Publication US 2007/0082822 A1, Apr. 12, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C09K 8/36 (2006.01); E21B 21/00 (2006.01); E21B 43/18 (2006.01) | ||
| U.S. Cl. 507—138 [507/103; 507/203; 507/267; 166/244.1; 166/305.1; 166/369] | 52 Claims |
| 1. A drilling fluid for drilling in a subterranean formation comprising an invert emulsion drilling fluid having a G′10/G′200
elastic modulus ratio greater than about 2 and/or a yield point in the range of from about 1.6 Pa to about 2.9 Pa at a shear
rate in the range of from 0.03 s-1 to 3.0 s-1 wherein the drilling fluid comprises:
a continuous phase;
an internal phase;
an emulsifier;
a weighting agent;
a rheology modifier;
a filtration control agent; and
0 to about 3 pounds per barrel of organophilic clay.
|