Wheeled portable trailer substructure for elevatable drawworks, masts and setback tower
US4138805A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1977 |
| Grant date | Feb 13, 1979 |
| Priority date | — |
| Expiry date | Oct 17, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B15/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A first and second mobile trailer means are secured together for forming a base substructure support for a mast, setback tower and drawworks. A working floor is provided in elevated position above the base substructure support when the mast, setback tower and drawworks is in position to conduct well operations. The telescoping mast and setback structure is pivotally carried on the first trailer means and a drawworks is pivotally carried by the second trailer means. A power and rig up arrangement is provided to elevate in a desired sequence the mast, setback structure and drawworks to a desired position for securing on the base substructure support formed by the first and second trailer means for conducting well operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.