Downhole cable grab assembly and method of use
US10392889B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2014 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Nov 2, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B31/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cable grab assembly includes a body having a longitudinally extending internal cavity disposed therein. A piston is disposed in the cavity and is axially moveable between a first position and a second position. At least two grab arms are hingedly attached to a bottom end of the body. A linkage assembly operatively couples the piston and the at least two grab arms such that movement of the piston between the first position toward the second position causes the at least two grab arms to pivot inward from an open position toward a closed position. A shear-pin restrains the piston to the first position. At least one spring element is disposed between the piston and an end of the cavity to shift the piston from the first position toward the second position to capture a broken cable when the shear-pin is sheared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.