Packer assembly with enhanced sealing layer shape

摘要

A packer assembly with an enhanced sealing layer is provided. The packer assembly may have an outer bladder with drains. The packer assembly may further have an inflatable inner packer disposed inside the outer bladder such that inflation of the inner packer causes the outer bladder to expand. End pieces may be coupled to the inner bladder and the outer bladder, and flowlines may be in fluid communication with the drains and the end pieces. A piston ring may reinforce the packer assembly. The piston ring may have three or more passive pistons which expand with the packer assembly during testing.

主权项

1. A downhole packer assembly comprising:
an outer bladder having a drain; an inflatable inner packer disposed within the outer bladder such that inflation of the inner packer causes the outer bladder to expand; end pieces disposed near ends of the inner bladder and the outer bladder; a flowline in fluid communication with the drain and the end pieces; a piston ring in communication with the flowline, wherein the piston ring has a plurality of pistons connected to one another in a loop; and a plurality of pivot joints each coupling one of the pistons to an adjacent piston of the plurality of pistons, thereby forming the piston ring.