Patent ID: 7213645

Claim:
A method of improving the pressure containment integrity of a well bore penetrating one or more subterranean formations and containing a drilling fluid or a completion fluid comprising the steps of: (a) pumping a viscous water or oil based fracture sealing composition into said well bore that rapidly converts into a high friction pressure sealing composition which does not bond to the faces of fractures; and (b) squeezing said fracture sealing composition into one or more natural fractures in said well bore or into one or more new fractures formed in said well bore to thereby increase said pressure containment integrity of said well bore, said fracture sealing composition having the property of rapidly converting into sealing masses which are diverted into and cause a near well bore widening of said fracture(s) upon commingling and reacting of said composition with oil, water or other components in said drilling fluid or completion fluid, with delayed set sealants or with the formation fluids in said well bore, said sealing masses having viscosities in the range of from about 1,000 centipoises to about 10,000,000 centipoises.