US 7,320,367 B2 | ||
Annular isolators for expandable tubulars in wellbores | ||
Michael M. Brezinski, Duncan, Okla. (US); Ralph H. Echols, Dallas, Tex. (US); Gary P. Funkhouser, Duncan, Okla. (US); William D. Henderson, Tioga, Tex. (US); Marion D. Kilgore, Dallas, Tex. (US); Ronald J. Powell, Duncan, Okla. (US); Robert S. Taylor, Red Dear (Canada); and Bradley L. Todd, Duncan, Okla. (US) | ||
Assigned to Halliburton Energy Services, Inc., Houston, Tex. (US) | ||
Filed on Jan. 19, 2007, as Appl. No. 11/624,757. | ||
Application 11/624757 is a division of application No. 10/981822, filed on Nov. 05, 2004, granted, now 7,252,142. | ||
Application 10/981822 is a division of application No. 10/252621, filed on Sep. 23, 2002, granted, now 6,854,522, filed on Feb. 15, 2005. | ||
Prior Publication US 2007/0114017 A1, May 24, 2007 | ||
Int. Cl. E21B 33/12 (2006.01) |
U.S. Cl. 166—387 [166/179; 166/380] | 9 Claims |
1. A method for forming an annular isolator between tubing and a borehole comprising:
attaching a chemical system in an inactive condition to an outer surface of an expandable tubing, the chemical system comprising
a two part chemical system which reacts in the presence of water,
encasing the chemical system in an inelastic nonreactive water resistant matrix installing the tubing in a borehole, and
expanding the tubing and thereby fracturing the matrix to expose the chemical system to ambient water.
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