Packer assembly
US4648448A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1984 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Dec 20, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/127
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole packer assembly includes a first packer tool with a flexible tubular packer body which is radially extendable by virtue of fluid pressure in a packer set chamber. A generally annular packer foundation, including an upper packer head, is connected to the upper end of the packer body. The tool defines a bypass flow system for permitting flow of fluid from the packer set chamber to a central longitudinal flowway of the assembly and from this central flowway to the exterior of the assembly. A control sub adjacent the packer foundation is movable with respect to the packer foundation between a first position, for opening the bypass system, and a second position, closing the bypass system. The control sub is preferably further operative, in its first position, to permit communication between the central flowway and the packer set chamber, and in its second position, to close the packer set chamber. A second packer tool is connected in tandem with the first tool. A ported cylinder is communicatively connected to the packer foundations generally below the locus of the control sub and has a piston reciprocably disposed therein and sealed with respect thereto, the piston being yie…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.