Sonic wireline dry slough barrel
US7828079B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2008 |
| Grant date | Nov 9, 2010 |
| Priority date | — |
| Expiry date | Apr 24, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B27/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Slough removal assemblies and methods for removing slough from boreholes are described. A slough removal assembly containing a slough barrel is lowered into a borehole having excess slough, driven into the slough to cause the slough to enter the slough barrel, and the slough removal assembly is then removed along with the excess slough. The slough removal assembly may contain a shoe coupled to the slough barrel and configured to be driven into the slough, a retainer positioned between the shoe and the slough barrel to retain slough inside of the slough barrel, and a driving mechanism (such as a drop hammer) to drive the slough assembly into the slough. The slough removal assembly may be coupled either to a wireline system or to a drill string for insertion into and removal from the borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.