Compare with normal caliper tool, the open hole caliper tool outputing six independent curves, hydraulic force supply strong actuating strength.

The open hole caliper charting a 3D image of borehole while runing wireline logging, monitoring the condition of borehole to avoid logging accident.

6 radius raw curves acquires by 6 circular distribution arms and calcualte to 3 diameters of borehole, the caliper tool widely used for calculation of sement volume, to estimate reservoir zone.

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