Bore location system and method of calibration
US6854535B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2002 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Dec 3, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/024
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for calibrating a pitch measurement of a horizontal underground bore location system includes providing a probe having a pitch sensor that measures deviation between a predetermined orientation and a measurement axis. A receiver has an antenna that detects a signal radiated by the probe and has receiver circuitry that detects the deviation from the received signal. A bore head is aligned with the predetermined orientation. The probe is placed in the bore head. The receiver detects the deviation when the bore head is aligned with the predetermined orientation. The receiver offsets deviation measurements thereafter detected from the probe by the measured deviation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.