Sensor unit for a logging tool and a logging tool with at least two sensor elements
US8726726B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2010 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Feb 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/88
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention concerns a dynamic pressure sensor unit (5A) for a logging tool for hydrocarbon wells with a piezoelectric element (5) in a sensor sleeve (3). The piezoelectric element (5) is a tubular element with an inner and an outer diameter. The sensor sleeve (3) has an inner cylindrical area with an inner diameter greater than the outer diameter of the tubular piezoelectric element (5). The piezoelectric element is situated in the inner cylindrical area of the sensor sleeve (3). A gap (12) with a gap thickness is formed between the inner cylindrical area of the sensor sleeve (3), defining an annular volume. The gap is filled with a noise transmitting liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.