Autonomous data transmission apparatus
A autonomous borehole data transmission apparatus is described for transmitting measurement data from measuring instruments at the downhole end of a drill string by generating pressure pulses utilizing a transducer longitudinally responsive to magnetic field pulses caused by electrical pulses corresponding to the measured downhole parameters. 4 figs.
- Issue Date:
- OSTI Identifier:
- 458573
- Assignee:
- PTO; SCA: 440400; PA: EDB-97:057037; SN: 97001758979
- Patent Number(s):
- US 5,615,172/A/
- Application Number:
- PAN: 8-636,175
- Contract Number:
- AC07-94ID13223
- Resource Relation:
- Other Information: PBD: 25 Mar 1997
- Research Org:
- Lockheed Martin Idaho Tech Co
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; MWD SYSTEMS; DATA TRANSMISSION SYSTEMS; PULSE TECHNIQUES; PRESSURIZATION; MAGNETIC FIELDS; ELECTRIC FIELDS; OPERATION