Slips for drill pipe or other tubular goods
US6264395A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 19, 2000 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Jun 19, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/7064
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Slip assemblies are provided for gripping drill pipe or other tubulars such that the load is distributed along the length of the dies of the slip segments rather than being concentrated at the lowermost dies within the slip segments. The load is distributed by the fact of using a load ring around the interior surface of each slip segment to allow the load ring to absorb part of the loading rather than have all of the load supported by the lowermost slip dies. In addition, resilient members are provided at the top surface of the uppermost die and also at the top surface of the die immediately underneath the load ring to better distribute the loading between the various slip dies and also to lessen the possibility of having gaps develop between the dies of the slip segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.