Downhole sensor tool for measuring borehole conditions with fit-for-purpose sensor housings
US9963964B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 2015 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Jul 15, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/085
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention is a system and method for measuring borehole conditions, in particular for verification of a final diameter of a borehole. The system includes a drill string with a drill bit and a drilling mud circulation device, an underreamer attached to the drill string above the drill bit, and a tool body attached to the drill string, having a sensor for detecting downhole conditions, such as borehole diameter. The tool body is mounted above the underreamer and has a diameter smaller than the underreamer and drill bit. The sensor can be an ultrasonic transducer with a sensor housing for adjustable distance to particular borehole size. The system may also include a calibrator for sensor data, and an auxiliary tool body with another sensor between the drill bit and the underreamer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.