Wireline set/tubing retrievable bridge plug
US4693309A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1986 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | Feb 19, 2006 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/134
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wireline set and tubing retrievable bridge plug. The bridge plug includes a central mandrel portion having a plurality of J-shaped recesses thereon at an upper end and at least one shaped recess at a lower end thereof. Disposed around the central mandrel is a packer mandrel having a packer element thereon and slips disposed therearound. A ratchet assembly is provided for holding the apparatus in a set position in which the packer element sealingly engages the well bore and the slips grippingly engage the well bore. The shaped lower recess in the central mandrel is disposed below the ratchet mechanism. A packer mandrel case having a lug therein for engaging the shaped recess is disposed around the lower end of the mandrel. The slips, ratchet mechanism and J-shaped recess are all positioned below the packer element for protection from debris in the well bore. A retrieving tool attached to a tubing string is used to retrieve the bridge plug. The retrieving tool opens a bypass passage through the bridge plug for facilitating removal from the well bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.