Well tubing handling apparatus
US4251176A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1978 |
| Grant date | Feb 17, 1981 |
| Priority date | — |
| Expiry date | Aug 31, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Well tubing handling apparatus useful for running and pulling tubing in a well bore and drilling a well bore including a main frame assembly, a pulling and snubbing assembly, a ladder assembly, and a work platform assembly. The apparatus is quickly assembled and torn down. The main frame assembly includes a base, telescoping non-load bearing guide tubes, a load-bearing mast, fixed slips, and winches and sheave and cable assemblies for manipulating pipe joints between handling positions in the apparatus and a pipe rack. The pulling and snubbing assembly includes a hydraulic cylinder connectible at the free end of the piston on the frame base, sheave mounted drive cables secured on the cylinder, traveling slips mounted on the drive cables, and an anchor between the drive cables and the main frame so that as the cylinder is raised and lowered the cables are driven around pulleys raising and lowering the traveling slips. A valve block is mounted on the base end of the cylinder for connection with a source of hydraulic power. The frame and pulling and snubbing assemblies include guide structure for quick coupling of the assemblies together. The apparatus may be fully supported on a well…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.