Drilling a well with predicting sagged fluid composition and mud weight
US9187966B2 · kind B2 · utility
2Cited by
7References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2013 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Feb 21, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods of drilling or treating a well including the steps of: designing a fluid with high-gravity solids (e.g., barite); calculating the sagged fluid mud weight after allowing for sag according to formulas; forming a fluid according to the sagged fluid mud weight; and introducing the fluid into the well. The methods can be used to help control the well or to avoid excessive drilling torque or pressure, kick, or lost circulation due to sag of high-gravity solids such as barite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.