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
OG exemplary drawing
 
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.