Method of protecting casing during high pressure well...

Details Method of protecting casing during high pressure well... Method of protecting casing during high pressure well...

E - Fixed Constructions

21

B

E21B 43/26 (2006.01) E21B 17/00 (2006.01)

Patent

CA 2049183

F-5924-L ABSTRACT A method of protecting casing during high pressure well stimulation. An annulus between the casing and tubing is loaded with water via a small volume of nitrogen to partially displace annular fluid down the annulus and up the tubing. This loading takes place prior to setting a packer. Loading in this manner results in a gas "cushion". If the tubing should burst during high pressure stimulation, compression of the "cushion" will prevent the casing from rupturing.

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