Increased load bearing thickness for anchoring slip
US9562410B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 2013 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Mar 15, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1293
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A slip design has segments that move relatively axially before moving in tandem up a ramp for radial extension. Due to the fact of the relative movement the segments interlock due to their geometric configuration or their surface treatment such that at the conclusion of such relative movement the load carrying thickness is effectively increased. The extended position minimizes radial extension of the slips for a smaller tool drift dimension while still allowing the needed radial extension and actually extending the radial reach of the slip assembly. The segment can have triangular or trapezoidal tapered interfaces that provide bearing areas between slip segments and adjacent spacer segment. Alternatively, the slips segments can have opposing wickers so that after riding up an underlying support member can interact with that member for load transfer. The supporting members can also be secured to an underlying mandrel for further load transfer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.