Acoustic dipole well logging instrument
US5731550A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1997 |
| Grant date | Mar 24, 1998 |
| Priority date | — |
| Expiry date | Mar 7, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/911
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A dipole acoustic well logging instrument including an acoustic transmitter. Receiver sections are disposed at axially spaced apart locations from the acoustic transmitter. Each receiver section includes an outer shoulder at each end adapted to be placed in acoustically isolated contact with an internal shoulder of a connector coupling when the instrument is in tension. The outer shoulders have an acoustically isolating material disposed on their surfaces. The receiver sections include an inner shoulder at each end adapted to be placed in direct contact with an external shoulder of the connector coupling when the instrument is in compression. The instrument includes one connector couplings disposed at each end of each receiver section to couple the receiver sections to each other and to the remainder of the instrument. At least one receiver element is disposed in a passage formed into each of the receiver sections. In one embodiment of the invention, the receiver element can be a bimorph-type dipole acoustic sensor. In another embodiment, the receiver element can be formed from a plurality of radially spaced apart piezoelectric elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.