Method and apparatus, including hose reel, for cleaning an oil and gas well riser assembly
US12421827B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2022 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Sep 28, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B37/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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 the riser. Cleaner fluid continuously recirculates so that relatively small volume of cleaning fluid is required. The cleaning process uses a volume of cleaning fluid that is discharged from the riser pipe at a relatively high temperature of about between 100 and 180° F. Such a high temperature cleaning fluid could possibly damage the pump that is used for supplying pressurized fluid to the cleaning tool. The present invention enables continuous recirculation of fluid to the cleaning tool at a flow rate of between about 7 and 12 gallons per minute while lowering the temperature to about 60° F.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.