Memory gravel pack imaging apparatus and method
US6554065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1999 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Nov 22, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention provides apparatus and method for evaluating the integrity of gravel packing. A screen is disposed in an annulus between the wellbore and a production tubing. A tubing, such as a wash pipe, is placed inside the production tubing to provide a fluid path for the gravel slurry for gravel packing the screen. A self-contained memory logging nuclear tool is located in the tubing below (downhole) the screen. After gravel packing, the tubing with the tool is retrieved from the well at a selected speed. The tool is activated to record data in the memory carried by the tool as it passes across the screen. The data stored in the memory is downloaded at the surface to produce a log which provides a measure of the integrity of gravel packing of the screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.