Well sealing compositions and methods
AssigneeHalliburton Energy Services, Inc.
InventorsJiten Chatterji, David D. Onan, Roger S. Cromwell, Bobby J. King
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Abstract
The present invention provides improved well sealing compositions and methods. The compositions are basically comprised of slag cement, water, a slag cement set activator, a hardenable epoxide containing material and an epoxide containing material hardening agent.
Claims16
An improved method of scaling a subterranean zone penetrated by a well bore utilizing a slag cement sealing composition comprising the steps of:
- (a) preparing a slag cement sealing composition that does not shrink and form micro cracks therein upon setting and as a result is substantially impermeable to gases and liquids consisting essentially of slag cement, a slag cement set activator, water, a hardenable epoxide containing material and an epoxide containing material hardening agent;
- (b) placing said slag cement sealing composition in said zone;
- and
- (c) allowing said slag cement sealing composition to set and said epoxide containing material therein to harden.
An improved method of sealing a subterranean zone penetrated by a well bore utilizing a slag cement sealing composition comprising the steps of:
- (a) preparing a slag cement sealing composition that does not shrink and form micro cracks therein upon setting and as a result is substantially impermeable to gases and liquids consisting essentially of slag cement, a slag cement set activator comprised of a mixture of sodium hydroxide and sodium carbonate, water, a hardenable epoxide containing liquid selected from the group consisting of the diglycidyl ether of 1,4-butanediol, the diglycidyl ether of neopentylglycol and the diglycidyl ether of cyclohexanedimethanol and an epoxide containing liquid hardening agent selected from the group consisting of isophoronediamine, diethyltoluenediamine, tris(dimethylaminomethylphenol) and mixtures of such hardening agents;
- (b) placing said slag cement sealing composition in said zone;
- and
- (c) allowing said slag cement sealing composition to set and said epoxide containing liquid therein to harden.
An improved method of sealing a subterranean zone penetrated by a well bore utilizing a slag cement sealing composition comprising the steps of:
- (a) preparing a slag cement sealing composition that does not shrink and form micro cracks therein upon setting and as a result is substantially impermeable to gases and liquids consisting essentially of slag cement, a slag cement set activator comprised of a mixture of sodium hydroxide and sodium carbonate present in an amount of about 2.57% by weight of slag cement in said composition, water present in an amount of about 46% by weight of slag cement in said composition, a hardenable epoxide containing liquid comprised of the diglycidyl ether of 1,4-butanediol present in an amount of about 7% by weight of slag cement in said composition and an epoxide containing liquid hardening agent comprised of diethyltoluenediamine present in an amount of about 2.4% by weight of slag cement in said composition;
- (b) placing said slag cement sealing composition in said zone;
- and
- (c) allowing said slag cement sealing composition to set and said epoxide containing liquid therein to harden.
Dependencies are inferred from the claim text.