Well drilling method and drilling fluid
US7055628B2 · kind B2 · utility
13Cited by
6References
28Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 14, 2002 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Oct 14, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/38
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A well drilling method comprises removing the drilling cuttings using an aqueous drilling fluid such as a foam including a foaming agent which includes at least one mono-(aliphatic hydrocarbyl) phosphate ester. More specifically, the drilling fluid takes the form of a potassium and/or alkanolamine and/or alkylalkanolamine salt, the foam also comprising a foam stabiliser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.