초록 ▼

A method and apparatus for removing solids from a substantially horizontal section of a wellbore which allows the use of coiled tubing as a workstring without requiring the removal of the production tubing from the wellbore. Guide tubing, which is left in the wellbore, extends from the surface throu

A method and apparatus for removing solids from a substantially horizontal section of a wellbore which allows the use of coiled tubing as a workstring without requiring the removal of the production tubing from the wellbore. Guide tubing, which is left in the wellbore, extends from the surface through the horizontal section and is adapted to guide a string of slightly smaller-diameter, coiled tubing through the horizontal section. Wash fluid, e.g. water, flows through a nozzle on the coiled tubing and out through openings in the guide tubing directly into the solids to form a slurry therewith. The slurry is then pumped out of the wellbore through the production tubing and/or reenters the guide tubing through other opening(s) therein to flow to the surface through the annulus which exists between the coiled tubing and the guide tubing.

대표청구항 ▼

[ What is claimed is:] [1.] A method for removing accumulated solids from a substantially horizontal section of a wellbore, said method comprising:positioning a production tubing within said wellbore for producing fluids therethrough;positioning a guide tubing in said wellbore substantially parallel

[ What is claimed is:] [1.] A method for removing accumulated solids from a substantially horizontal section of a wellbore, said method comprising:positioning a production tubing within said wellbore for producing fluids therethrough;positioning a guide tubing in said wellbore substantially parallel to said production tubing and extending from the surface and substantially through the entire said horizontal section of said wellbore;lowering a coiled tubing through said guide tubing; andflowing a wash fluid down said coiled tubing to wash said solids from said horizontal section of said wellbore as said coiled tubing moves through said guide tubing.