Snubbing unit for inserting tubular members without a riser
US9970243B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2016 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Jul 28, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The snubbing unit inserts a tubular member into a well without a riser. The snubbing unit includes a set of stationary slips in a first base plate, a first set of traveling slips in a second base plate, a second set of traveling slips in a third base plate, and a plurality of hydraulic cylinders connecting the base plates. Each set of slips has an engaged position and a released position relative to the hydraulic cylinders. The base plates are cooperative with a pipe guide so that movement of the tubular member between the base plates corresponds to consistent support of the tubular member to preventing buckling. The snubbing unit increases safety and support for inserting into the well without a riser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.