Swelling packer with overlapping petals

Details Swelling packer with overlapping petals Swelling packer with overlapping petals

Filed on

2008-09-09

Date issued

2008-09-09

Examiner

Neuder, William P (Department: 3672)

Patent Class

Wells

SubClass

Processes

SubSubClass

Placing or shifting well part

Other Related Categories

C166S179000, C166S187000

Type

Reexamination Certificate

Status

active

Patent number

11326212

Description

ABSTRACT:
A packer for downhole use features interacting elements of swelling material. Preferably the elements are in contact for relative movement from an initial diameter for run in. As the elements swell, they move with respect to each other to enlarge the diameter of the assembly so that a sealing contact is made. Each element exerts a residual force on the adjacent element to enhance the seal. Each element is preferably coated with a material that allows well fluids to reach the swelling material and then later to stiffen and become impervious from exposure to such fluids. The assembly can be covered for run in to delay the onset of expansion until the target depth is reached for the packer to be set.

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