Non-damaging slips and drillable bridge plug
US8579024B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2010 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Nov 23, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/134
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A non-damaging slip assembly includes slips having grit on a smooth surface, the slips preferably made from a ductile material, such that the slips do not cause damage to the wall of a tubular when the slips are set. The slips fail under tensile force during setting. The cone used to expand the slips may have slits that narrow during setting of the slips. The slip assembly may be used to anchor a variety or devices inside a tubular. A drillable, non-damaging bridge plug using the non-damaging slip assembly has a threaded mandrel holding the cone by threads inside the cone. When the slips are set, the slits in the cone narrow such that threads in the cone do not allow rotation of the slips as they are drilled. The bridge plug can be drilled by a PDC bit without damaging the tubular.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.