Propellant treatment and continuous foam removal of well debris

Details Propellant treatment and continuous foam removal of well debris Propellant treatment and continuous foam removal of well debris

E - Fixed Constructions

21

B

E21B 43/263 (2006.01) E21B 21/14 (2006.01) E21B 43/25 (2006.01)

Patent

CA 2438640

A damaged formation is stimulated by igniting a propellant adjacent openings in the wellbore in communication with the damaged formation. Substantially immediately thereafter, low density foam is injected adjacent the openings and circulated to the surface for the removal of debris released from the formation. A tubing string has a foam discharge port at a distal end and a foam injection port at surface. The tubing string extends sufficiently above the wellbore at surface to enable lowering of the tubing string and foam discharge port to below the openings for enhanced removal of debris

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