Method and assembly for treating and producing a welbore using d

Details Method and assembly for treating and producing a welbore using d Method and assembly for treating and producing a welbore using d

1997-11-02

2000-06-13

Bagnell, David

Wells

Processes

Cleaning or unloading well

166 50, 166222, 1662423, E21B 2100, E21B 3707

Patent

active

060736968

ABSTRACT:
A method and assembly for treating a portion (e.g. horizontal) of a wellbore for removing solids and for producing fluids therefrom. The assembly is comprised of dual flowpaths (e.g. tubing strings) extend from the surface into the portion of the wellbore to be treated and produced. A liner is connected on the lower end of the first flowpath while the second flowpath terminates within the upper end of the wellbore portion. A treating fluid is flowed down the first flowpath and through the liner into the wellbore to wash and entrain solids therein. The treating fluid and solids are then circulated back to the surface through the second flowpath. After treatment, the second flowpath is closed and fluids are produced through the liner and to the surface through the first flowpath.

REFERENCES:
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patent: 4945995 (1990-08-01), Tholance et al.
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patent: 5297627 (1994-03-01), Sanchez et al.
patent: 5626193 (1997-05-01), Nzekwu et al.
patent: 5865249 (1999-02-01), Gipson et al.
patent: 5931230 (1999-08-01), Lesage et al.
"Steam Circulation in Horizonal Wellbores"; D.A. Best et al; SPE/DOE 20203; presented at Tulsa, OK. Apr. 22-25, 1990.
"Horizontal Well Sand Cleanouts"; B.D. Heinrichs et al; SPE 30269; Calgary, Alberta, Canada; Jun., 1996.
Co-pending U.S. Patent Application; Serial No. 08/838,901; filed Apr. 11, 1997.

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