Casing or work string orientation indicating apparatus and methods
US8091246B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 2008 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Oct 20, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/024
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Casing or work string orientation indicating apparatus and methods. A system for indicating orientation of a structure in a wellbore includes an orientation indicating device responsive to fluid flow through the device, whereby fluid flow through the device at a selected flow rate produces a reduced pressure differential across the device when the device is at a preselected azimuthal orientation, compared to an increased pressure differential across the device produced by fluid flow through the device at the selected flow rate when the device is not at the azimuthal orientation. A method of detecting orientation of a structure in a wellbore includes the steps of: flowing fluid at a selected flow rate through an orientation indicating device interconnected to the structure; and observing a substantially constant pressure differential across the device during the flowing step, thereby indicating that the structure is at a predetermined azimuthal orientation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.