Methods of sealing pipe strings in disposal wells
AssigneeHalliburton Energy Services, Inc.
InventorsLarry S. Eoff, Jiten Chatterji, Roger S. Cromwell, Bobby J. King
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Abstract
Improved methods of completing wells penetrating subterranean corrosive fluid disposal zones are provided. The methods basically comprise the steps of preparing a pumpable, water compatible, corrosion resistant, hardenable epoxy sealing composition comprised of a hardenable epoxide containing liquid and a hardening agent, placing the epoxy sealing composition in the annulus between a string of pipe and a well bore penetrating a disposal zone and allowing the epoxy sealing composition to harden.
Claims13
An improved method of sealing a pipe string in a well bore penetrating a subterranean corrosive fluid disposal zone comprising the steps of:
- (a) preparing a pumpable, water compatible, hardenable epoxy sealing composition which can be displaced or otherwise contacted with water or a water containing fluid without the occurrence of premature hardening or other adverse result comprising a hardenable epoxide containing liquid and a hardening agent for said epoxide containing liquid;
- (b) preparing a hydraulic cement sealing composition comprised of hydraulic cement and water;
- (c) displacing said hydraulic cement sealing composition with said hardenable epoxy sealing composition into and through the annulus between said string of pipe and the portion of said well bore penetrating said subterranean corrosive fluid disposal zone whereby said hardenable epoxy sealing composition spans the portion of said annulus between said string of pipe and said subterranean corrosive fluid disposal zone and said displaced hydraulic cement composition spans the annulus between said string of pipe and another portion of said well bore;
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- (d) allowing said hardenable epoxy sealing composition to harden and said hydraulic cement sealing composition to set.
Dependencies are inferred from the claim text.