Patent ID: 6321841
Filing Date: 2001-11-27
Classification: C04B,C09K,Y10S

Abstract:
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; and(d) allowing said hardenable epoxy sealing composition to harden and said hydraulic cement sealing composition to set.