Steam injection packer actuator and method

Details Steam injection packer actuator and method Steam injection packer actuator and method

1986-07-16

1987-04-07

Leppink, James A.

Wells

Processes

Placing or shifting well part

166 53, 166187, E21B 2306, E21B 33127

Patent

active

046552928

ABSTRACT:
An actuating assembly for a single set production-injection packer and a method of operation are provided for use in variable temperature downhole environments, such as are encountered in steam injection processes for petroleum recovery operations. After the packer is set, a compensator allows for fluid volume increase or decrease of the packer fluid chamber to maintain the proper packer inflation pressure. A piston-type accumulator with a preselected nitrogen load prevents rupture of the packer by compressing the nitrogen load while further expanding the fluid chamber for the packer fluid should the inflation pressure rise above a selected level. The packer may be unset by axially raising the tubing with respect to the set packer to open the packer fluid to downhole pressure.

REFERENCES:
patent: 4260164 (1981-04-01), Baker et al.
patent: 4527625 (1985-07-01), Wood et al.
patent: 4589484 (1986-05-01), Doherty et al.

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