Optimum perforation design and technique to minimize sand intrusion
US6283214A · kind A · utility
107Cited by
6References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1999 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | May 27, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/117
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present Invention relates to novel devices and methods to minimize the production of sand in subterranean environments; in particular, in poorly consolidated formations, sand is often co-produced along with the desired fluid (e.g., oil); sand production is undesirable, hence in the present Invention, elliptically shaped perforations of a particular orientation are created in the casing (or directly into the formation in the case of an uncased wellbore) that lines wellbore drilled through the formation, to improve near-wellbore stability of the formation, hence minimizing sand intrusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.