Apparatus and method for cleaning well risers
US6454009B2 · kind B2 · utility
18Cited by
6References
9Claims
0Family size
Inventors
Key dates
| Filing date | Jan 3, 2001 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Jan 3, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B37/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention is directed to a method of cleaning a well riser. In particular, the method comprises the steps of suspending in a drill pipe from the surface a circulating tool in the well riser, and causing the circulating tool to axially collapse so as to open one or more radial outlets in the tool and allow cleaning fluid to be expelled out of the tool and impact on the inside of the well riser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.