Method and apparatus for cleaning an oil and gas well riser assembly with multiple tools simultaneously
US11135628B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 2020 |
| Grant date | Oct 5, 2021 |
| Priority date | — |
| Expiry date | Jan 15, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B37/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to a method and apparatus for cleaning an oil and gas well riser section or assembly on location offshore that includes a larger diameter central pipe and a plurality of smaller diameter pipes that are spaced radially away from the central larger diameter pipe. Even more particularly, the present invention relates to an improved method and apparatus for cleaning oil and gas well riser sections wherein a specially configured cap or pair of caps are fitted to the ends of the riser which enable pressure washing cleaning tools (or a camera) to be inserted into and through a selected one of the pipes including either a smaller diameter of the pipes or the central larger diameter pipe and wherein the cap continuously collects spent cleaning fluid and debris, allowing the cleaning process to be done on location without transporting the riser section back onshore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.