Down hole measurement system
AssigneeMti Group Pty Ltd
InventorNicholas Bodley
Life of this patent
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Abstract
A bore hole measurement system includes a cable with spaced apart embedded elements along a length of the cable, a sensor for detection of the elements as they move relatively past the sensor, and a processor for determining the distance that the cable has travelled based on the detections of elements that have moved past the sensor. A method includes detecting the elements moving past a sensor, and determining the distance that the cable has travelled based on the detections of elements that have moved past the sensor.
Claims18
A blast hole measurement system comprising:
- a cable comprising equally spaced apart embedded elements along a length of the cable and comprising an outer protective layer of polyurethane or poly tetrafluoroethylene for protecting against wear damage from a blast hole, the cable comprising electrical wires surrounded by a fiber-glass layer being resistant to stretching over a depth of the blast hole;
- a sensor for detection of the elements as the elements move relatively past the sensor;
- and
- a processor for determining a distance that the cable has travelled into the blast hole based on the detections of elements that have moved past the sensor.
A method of making a measurement of a blast hole comprising:
- providing a cable comprising equally spaced apart embedded elements along a length of the cable;
- detecting the elements moving past a sensor;
- determining a distance that the cable has travelled based on the detections of elements that have moved past the sensor, without needing to account for substantial stretching of the cable when deployed in the blast hole;
- determining whether a probe at an end of the cable is in contact with water using a water detector at the end of the probe;
- determining when the probe encounters a bottom of the blast hole using an accelerometer in the probe;
- and
- wherein, in the event that the water detector detects the end of the probe is in contact with water, determining a depth of the water by a number of detections of elements that have moved past the sensor between when the water detector detects the end of the probe is in contact with water and when the probe encounters the bottom of the blast hole.
A blast hole measurement system comprising:
- a cable comprising spaced apart embedded elements along a length of the cable, the cable being resistant to stretching;
- a sensor for detection of the elements as the elements move relatively past the sensor;
- and
- a processor for determining a distance that the cable has travelled based on the detections of elements that have moved past the sensor;
- wherein the cable comprises a probe at an end of the cable and an electrical wire core for transmitting a plurality of signals from the wire core, the wire core being suitable for communication over a distance substantially the length of a blast hole,
- wherein the probe comprises a water detector for detecting that the end of the probe is in contact with water;
- wherein the probe comprises an accelerometer and the processor is configured to determine a depth of the water based on a number of elements that have moved past the sensor between when the water detector detects that the end of the probe is in contact with water and when the accelerometer detects that the probe encounters the bottom of the blast hole.
Dependencies are inferred from the claim text.