Pipe gripping assembly with power screw actuator and method of gripping pipe on a rig
US7854265B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 2008 |
| Grant date | Dec 21, 2010 |
| Priority date | — |
| Expiry date | Nov 13, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B3/022
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pipe gripping assembly having a quill, an actuator and a drive assembly mounts to a top drive of a drilling rig. The quill is connected to a mandrel in the drive assembly. The drive assembly has a tapered mandrel and a set of slips that move along the taper into and out of engagement with the pipe. The actuator is connected to both the quill and a portion of the drive assembly. The actuator includes a motor and at least two sleeves that are threaded together. One sleeve has a spline on its outside diameter that mates to the motor and a gear. Power applied to the motor causes the actuator to move slips in the drive assembly into an engagement position that grips the pipe for lifting and rotating the pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.