BOREHOLE INSPECTING AND TESTING DEVICE AND METHOD OF USING THE SAME

摘要

A borehole inspection device and method of using the same to measure the condition of the bottom extent of a borehole, the system having a head unit assembly with top and bottom sides and including at least one downwardly extending force sensor configured to measure a reaction force applied to the at least one sensor as it engages a bottom extent of the borehole, the inspection device being configured to be lowered into a borehole and to bring the sensor(s) into contact with the bottom extent wherein continued downward movement of the head unit creates the reaction force on the sensor(s) to determine at least one of a location of an associated debris layer, a bearing capacity of the associated debris layer, the thickness of the associated debris layer, the location of an associated bearing layer and/or the bearing capacity of the associated bearing layer.

主权项

1. A borehole inspection device to measure the condition of a bottom extent of a borehole including measuring a debris layer depth of a debris layer on a bottom extent of a borehole and/or a bearing layer load capacity of a bearing layer of the material below the debris layer, the inspection device comprising a head unit assembly configured to be operably joined to an associated lowering unit to lower the head unit into an associated borehole, the head unit having a top side and a generally opposite bottom side, the bottom side facing a bottom extent of the associated borehole, the head unit further including at least one downwardly extending force sensor extending downwardly relatively to the bottom side and having a distal end extending toward the associated bottom extent, the at least one downwardly extending force sensor configured to measure a reaction force applied to the at least one sensor as it engages the associated bottom extent of the associated borehole, the inspection device being configured to be lowered into an associated borehole by the associated lowering unit and to bring the at least one downwardly extending sensor into contact with the associated bottom extent of the associated borehole, continued downward movement of the head unit creating the reaction force on the least one downwardly extending force sensor to determine at least one of a location of an associated debris layer, a bearing capacity of the associated debris layer, the thickness of the associated debris layer, the location of an associated bearing layer and/or the bearing capacity of the associated bearing layer.