Workover rig with reinforced mast
US9068401B2 · kind B2 · utility
0Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2012 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Aug 14, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04H12/182
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A reinforced workover rig mast (40) is disclosed. A top section (60) of the mast (40) telescopes relative to a mid section (44), and includes a scoping cylinder area (72) for receiving a scoping cylinder (90) that may be used to extend and retract the top section (60). A number of external gussets (78) are located within this scoping cylinder area (72) to structurally reinforce the upper section (60). Other reinforcement features are incorporated by the mast (40) as well, including an increased width and depth, along with a reduced vertical spacing between adjacent cross supports (50b, 66b, 74).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.