Remedial wellbore sealing with unsaturated monomer system

Details Remedial wellbore sealing with unsaturated monomer system Remedial wellbore sealing with unsaturated monomer system

1994-04-25

1996-01-16

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166285, E21B 3313

Patent

active

054840201

ABSTRACT:
A defective cemented annulus in a wellbore is repaired by injecting a water-soluble monomeric composition having polymerizable unsaturated groups. This allows repair of leaking cement jobs where the leakage occurs through very small imperfections. In accordance with the invention, a section of the casing above the area where formation fluid pressure may be entering is sealed off with packer devices, perforated or mill cut and a monomer solution is injected into the cemented annulus.

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