Retrievable bridge plug and retrieving tool
US5813456A · kind A · utility
Inventors
Key dates
| Filing date | Nov 12, 1996 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Nov 12, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1292
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A retrievable bridge plug apparatus and retrieving tool, the retrievable bridge plug apparatus serving as a temporary bridge plug that can be set in casing in order to isolate the zone and aiding in the stimulation of the zone or test which would be conducted within the zone. The apparatus would include mechanical slips and compression type sealing packer rubbers with a mechanically operated J-slot for locking it in the running position or the set position. Further, the packer rubbers would be of sufficient size for allowing an annulus between the packer body and the wall of the casing for running and bypassing fluid as it travels in and out of the well, yet are sufficiently close tolerance to the casing for preventing extrusion when set and can be exposed to high differential pressure. There is further provided an equalizing valve for assuring equalization of pressure before the tool is released and providing additional area for bypassing fluid travelling in and out of the well for faster running of the tool in and out of the casing. It is further provided a running tool which would prevent the accidental loss of the bridge plug and threaded connections in the packer mandrel by pe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.