Wireline hydraulic retrieving tool
US5228507A · kind A · utility
Inventors
Key dates
| Filing date | Aug 23, 1991 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Aug 23, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/042
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In wireline operations, it is known to retrieve objects stuck in a well bore by application of a retrieving force applied to the object through the wireline and a wireline pulling tool attached to the wireline and engaged with the object. The present invention provides a wireline retrieving tool which is adapted to apply a large retrieving force on a pulling tool engaged with an object in the well bore without having that force transmitted directly through the wireline. The retrieving tool is adapted to be lowered into the well bore on the wireline to a position where the pulling tool engages the stuck object. Slips carried on in the tool then anchor the tool against the tubular casing or tubing of the well bore and a controlled retrieving force generated in the tool by an electric motor and hydraulic pump is applied between the casing or tubing and the pulling tool to dislodge the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.