Swelling packer element with enhanced sealing force
US7552768B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 2006 |
| Grant date | Jun 30, 2009 |
| Priority date | — |
| Expiry date | Jan 29, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/128
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A packer that uses an element that swells to the set position is disclosed having a device that boosts the set force of the swollen element against the borehole. The force is axially applied at one end or two and preferably comprises a cone driven by a stored or applied force such that the cone is driven between the element and the mandrel that supports the element. Initiation of the boost force can be varied in its timing and the power behind the cone can come from a variety of sources such as a spring, hydrostatic pressure, or applied forces, to name a few. The movement of the cone is locked to prevent reversal of its motion when the packer is set. The swelling enhances the engagement of the element to the cone to minimize relative movement between them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.