Patent ID: 9222330
Filing Date: 2015-12-29
Classification: C09K,E21B

Abstract:
1. A method for providing one or more seals at a plurality of locations in an annular space between a well tubular and a surrounding formation or between pipes of a wellbore system, said method comprising the steps of a) determining an in-situ temperature, pressure, earth formation properties and one or more fluids present at the plurality of positions to thereby determine a density of the one or more fluids present at the plurality of locations, b) providing a sealing substance comprising an epoxy, phenolic, or polyester based fluid, at least one solid component, and a hardener for causing the sealing substance to cure, configuring said sealing substance to have physical and fluid dynamic properties compatible with the in-situ parameters determined in step a) to thereby facilitate placing the gel at one or more of the plurality of locations where said seals are desired, and c) injecting said sealing substance through a plurality of openings formed in said well tubular, wherein said sealing substance is configured to flow into the annular space and then around the exterior surface of the well tubular to thereby fill an entire annular space that extends between an exterior surface of the well tubular to the surrounding formation, without sinking or floating away from a point of injection, and cure to form said one or more seals at the plurality of locations to thereby isolate a first annular region of space between the well bore and the exterior surface that extends along a first longitudinal section of the well tubular from a different annular region of space between the well bore and the exterior surface that extends along a second longitudinal section of the well tubular.