Trailer mounted high floor drilling mast and substructure arrangement
US4292772A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1980 |
| Grant date | Oct 6, 1981 |
| Priority date | — |
| Expiry date | Jan 14, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B15/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Telescopable drilling mast means is transportable on and pivotally connected to a first trailer means. Setback tower means is pivotally connected to the drilling mast means and to the first trailer means. Second trailer means are provided with elevatable drawworks support means with drawworks, power source and rotary table thereon which elevatable drawworks support means is transportable on and pivotally mounted on the second trailer means. Means secure the first and second trailer means in end to end relation to position the drawworks support means and drilling mast means in longitudinal alignment, and load bearing means support the first and second trailer means in position on the earth's surface. Lifting frame means is connected to the drilling mast means and positionable to extend upwardly therefrom whereby the drilling mast means, and setback tower means may be simultaneously elevated from a reclined position to an upright position on the first trailer means by cable means having one end secured to the lifting frame means and then extending over sheave means mounted on the drawworks support means and over sheave means at one end of the lifting frame means and around sheave mea…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.