Cleanout procedure for well with low bottom hole pressure

Details Cleanout procedure for well with low bottom hole pressure Cleanout procedure for well with low bottom hole pressure

E - Fixed Constructions

21

B

166/55

E21B 21/00 (2006.01) E21B 37/00 (2006.01) E21B 43/34 (2006.01)

Patent

CA 1071098

CLEANOUT PROCEDURE FOR WELL WITH LOW BOTTOM HOLE PRESSURE (D#50,000 TTrin-56-F) Abstract of the Disclosure A cleanout procedure for use in a well with low bottom hole pressure that has become filled with sand. It employs a conductor string of pipe and a wash string of pipe inside the conductor string, both inserted in the well. A high pressure gas is applied to the inner annulus formed by the conductor and wash string, and the workover wash fluid is circulated down the wash string up the outer an- nulus formed by the well casing and the conductor string, to be joined by the gas and so wash out the sand through the outer annulus. Sand is spearated at the surface. -I-

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