Standard borehole inclinometers are designed to measure borehole shape accurately in boreholes within a few degrees of vertical. Horizontal inclinometers measure profile in a vertical plane, with no information in the horizontal plane. In each case, grooved casing and wheels are used for azimuth and centering control.
Drainholes are commonly raked significantly above horizontal and may contain small diameter un-grooved plastic casing. For quality control reasons, it may be desirable to ensure that drainholes are built to design, especially to avoid large gaps in drain coverage due to inaccurate drilling. This is a one-time, single pass measurement, unlike most inclinometer measurements which are made repeatedly to detect ongoing movement.
The Borehole Profile Sensor is designed to provide mapping of boreholes raked above horizontal. It does not have wheels nor does it use grooved casing. The sensor is inserted into the borehole using rigid rods, and measured at intervals set by cable marks, typically 24' or 0.5 m. The heading or azimuth is measured relative to terrestrial magnetism via a 3D magnetostrictive sensor, a 3D MEMS accelerometer and proprietary software. Roll of the sensor in the axis of the borehole is measured by the 3D MEMS accelerometer, and manually nulled by rotating the insertion rods. The pitch or rise of the borehole is measured by a precision MEMS inclinometer.
The data is collected with RST’s Ultra-Rugged Field PC2 and is downloaded via Activesync to a comma separated text file (.CSV) for analysis in Microsoft Excel™ or similar software.
This concept can be built for profiling other boreholes, with different diameter, sensor length and nominal plunge.
Collect data via RST's (Bluetooth) wireless readout, the Ultra Rugged Field PC2.
Collected data can be easily analyzed in .CSV format in Microsoft Excel™ or similar format.
Uses standard inclinometer reel.
Heading Range of 0-359.9°
Heading Resolution of 0.1°
Heading Accuracy (+25° pitch) of 1.0°
Heading Accuracy (full pitch range) of 3.0°
Roll Range of +/-60°
Pitch Range of -5° to +55°
Pitch Accuracy of 0.05°
Pitch Length Overall of 36.4 in.
View brochure for complete specifications.
To provide mapping of boreholes raked above horizontal.
For profiling other boreholes, with different diameter, sensor length, and nominal plunge.
Custom Options (See Brochure)