Horizontal directional drilling crossbore detector
US11530605B2 · kind B2 · utility
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25Claims
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Key dates
| Filing date | Mar 14, 2016 |
| Grant date | Dec 20, 2022 |
| Priority date | — |
| Expiry date | Jan 28, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/013
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A crossbore detection system. The system is located in a downhole tool proximate a drill bit. The system comprises circuitry sensitive to a subsurface environment and a sensor that detects changes in the circuitry. The sensor detects changes in the circuitry that indicates that the drill bit has struck an underground pipe. The sensor may detect a series of electromagnetic signals indicative of the strike or may detect changes to an impedance bridge at a capacitive sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.