Method and apparatus for cleaning an oil and gas well riser assembly with multiple tools simultaneously
US10195650B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 2016 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Aug 29, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/01
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is directed to a method of cleaning an oil and gas well riser section that has a central larger diameter tubular member having a flow bore and a plurality of smaller diameter tubular members connected to the central larger diameter tubular member, each smaller diameter tubular member having a flow bore. The method includes placing a fitting on an end portion of the riser section, the fitting covering an end of the larger diameter tubular member and the ends of the smaller diameter tubular members, wherein the fitting preferably has multiple openings including one or more centrally located openings and a plurality of circumferentially spaced apart outer openings that are spaced radially away from each of the one or more centrally located openings, said fitting having a drain opening. A cleaning tool is preferably inserted through the centrally located opening and into the larger diameter tubular member, wherein said pressure washing tool cleans the inside surface of the larger diameter tubular member. The cleaning tool is then preferably inserted through one of the outer openings and into one of the smaller diameter tubular members, wherein said second pressure…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.