Method of protecting casing during high pressure well stimulatio

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

1990-09-20

1991-10-15

Melius, Terry L.

Wells

Processes

Placing fluid into the formation

166387, E21B 4326

Patent

active

050565982

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.

REFERENCES:
patent: 4047569 (1977-09-01), Tagirou et al.
patent: 4064941 (1977-12-01), Smith
patent: 4067389 (1978-01-01), Savins
patent: 4378845 (1983-04-01), Medlin et al.
patent: 4662831 (1987-05-01), Bennett
patent: 4700783 (1987-10-01), Baron
patent: 4917185 (1990-04-01), Jennings, Jr. et al.

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