Method and apparatus, including hose reel, for cleaning an oil and gas well riser assembly with multiple tools simultaneously
US10596605B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 2017 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Mar 1, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/01
- 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. 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 the riser cleaner fluid continuously recirculates so that relatively small volume of cleaning fluid (for example between about 700 and 1,000 gallons) 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 provides a method and apparatus for enabling 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.