Method and composition for sweep of cuttings beds in a deviated borehole
US6290001A · kind A · utility
24Cited by
15References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 2000 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | May 18, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/927
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A sweep material is disclosed comprising barium sulfate that has been ground and sieved, preferably in the range of about -95% 30 mesh to about +95% 100 mesh. The sweep material is added to and circulated with the drilling fluid during drilling of a deviated, directional or horizontal well to remove cuttings beds accumulated on the lower side of the well. After the drill cuttings are dislodged, the drilling fluid is sieved or screened to remove the barium sulfate to avoid a change in density of the fluid. The drilling operation does not have to be stopped during the sweep or cleaning treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.