multi finger caliper arms in wireline logging tools

Multi-Finger caliper tool is composed of electronics assembly, Multi-finger assembly,Caliper measuring assembly, Motor assembly.

The primary function of Multi-Finger Caliper is to detect the deformation, bending, fracture, perforation and inside corrosion of tubing or casing with multi caliper fingers that are in close contact with the inner wall of the casing. Each caliper finger is connected to an independent non-contact displacement transducer that features small sizes, long service life, and high accuracy of measurement. Working Temperature: -20℃~175℃(-4℉~347℉)/ 2 hours Working Pressure: ≤100MPa(14,503 psi) Working Voltage: 90V±10% Working Current: 30±5mA Caliper Measuring Point: 638.5mm(25.14″) (from bottom of the tool) Max. Logging Speed: 600 m/h ( 32 ft/min )