Knuckle-swivel for drilling wells
US7217056B2 · kind B2 · utility
10Cited by
5References
9Claims
0Family size
Inventor
Key dates
| Filing date | Nov 9, 2001 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Nov 9, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16G15/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A knuckle-swivel (10) is used with well drilling equipment for protecting helical wound line 62, which may be wire rope, cable and/or strand, against torsional forces and also providing for angular displacement of sinker bars or other tools during wireline strip over operations to minimize interference with rig equipment (80) when pulling pipe or tools 64 from a well head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.