Low temperature epoxy system for through tubing squeeze in profi

Details Low temperature epoxy system for through tubing squeeze in profi Low temperature epoxy system for through tubing squeeze in profi

1993-12-27

1995-01-03

Novosad, Stephen J.

Wells

Processes

Repairing object in well

166272, 166295, E21B 2910, E21B 33138, E21B 4324

Patent

active

053777573

ABSTRACT:
A method for zone isolation, profile modification, remedial cementing, or replacing a damaged or corroded casing with a solid plastic is described. A solidifiable epoxy resin mixture, containing a critical amount of a hardener and curing agent for improved pumpability, is placed into a wellbore so as to bind with undamaged casing and close off any thief zones. Subsequently, the epoxy resin mixture forms a hardened solid underwater and/or at low wellbore temperatures that is able to withstand downhole stresses. The hardened solid is milled out if necessary so as to form a resinous casing the size of the original casing. Later, the hardened resinous casing is perforated to communicate with a targeted zone. Perforation is not required when isolating a zone. The hardened solid is of a strength sufficient to withstand stresses generated during EOR operations such as carbon dioxide or steam-flooding. Said solid is also resistant to workover acids and other chemicals used in EOR operations.

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patent: 5178219 (1993-01-01), Striech et al.

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