| 摘要 |
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.
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