Memory cement bond logging apparatus and method
US6850462B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2002 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Jan 30, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and device are shown for detecting the characteristics of a cement annulus between a casing in a borehole and the surrounding earth formations in a slickline cement bond logging operation. An acoustic logging tool is utilized which produces a pure signal downhole. The received acoustically transmitted energy produces electrical signals indicative of both the amplitude of the received energy and variable density log data. Both the amplitude data and the variable density log data are captured in memory downhole by the use of a time amplitude matrix which stores a limited number of data points for producing a cement bond log at the well surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.