Device for controlling the flow of fluid in an oil well
US5404945A · kind A · utility
23Cited by
5References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1992 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Dec 29, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87539
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A device is provided for controlling fluid flow in oil well casings or drill pipes. The device defines a flowpath for fluid through a casing section or drill pipe with the flowpath including a throttling valve which restricts or prevents the flow of fluid therethrough. This can be used to prevent U-tubing in casings or can be used to locate leaks in drill pipes or can be used to monitor the position of successive fluids of differing viscosities in a casing string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.