Multi-bar scraper for cleaning marine risers and wellbores
US10344563B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2015 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Dec 16, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B5/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An instrument for the mechanical removal of corrosive buildup, deposits or scale from within a wellbore. A tubing-conveyed scraping blade and/or other abrading devices (50) has a collapsible maximum outer diameter by using a multi-bar mechanism (53, 54) to ensure physical contact with corrosive buildup, deposits or scale on surfaces of a surrounding wellbore, oil and gas tubular, or drilling/production marine riser (and, in particular, inner surfaces thereof). The multi-bar mechanism allows for a wide range of motion irrespective of the direction of loading and variable maximum outer diameter to clean corrosive buildup, deposits or scale from tubular goods with unknown configurations and/or dimensions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.