Electromagnetic power and communication link particularly adapted for drill collar mounted sensor systems
US6856255B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2002 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Aug 2, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/13
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electromagnetic coupling system is disclosed which includes a first electromagnetic transducer sealingly disposed in an outer wall of a tool mandrel, the mandrel adapted to be positioned in a drill collar. A second electromagnetic transducer is sealingly disposed in an interior of a port in the drill collar. The second transducer is positioned so that it is proximate the first transducer when the mandrel is positioned in the drill collar. A third electromagnetic transducer is sealingly disposed in an exterior of the port in the collar. The second and third transducers define a sealed chamber in the port. The second and third transducers are electrically coupled to power conditioning and signal processing circuits disposed in the chamber. A fourth transducer is positioned proximate the third transducer. The fourth transducer is electrically coupled to at least one of a sensor, an external communication line and an external power line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.