Chemically enhanced drilling methods
US6772847B2 · kind B2 · utility
11Cited by
10References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2002 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Feb 26, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/29
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods and materials for chemically enhanced drilling of oil/gas wells are disclosed. The use of drilling fluids containing chemicals that dissolve formation constituents results in the creation of boreholes. Fluids containing acids such as hydrochloric acid, formic acid, acetic acid, or combinations thereof have been found to be especially useful in chemical drilling of formations containing basic minerals such as calcium carbonate. The use of acid has the further advantage of simultaneously stimulating the borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.