Repair of the case resistivity meter (telemetry) without dismantling the electronics

Repair of the case resistivity meter (telemetry) without dismantling the electronics
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Rezistivimetr — the electric device with the probe of small length serving for measurement of specific electrical resistance of the liquid filling a well trunk.

Detail:

  • Problem: abrasion of contact pads, chips after working hours of 350 hours. The complexity of surfacing without complete dismantling of electronics. Expensive repair of imported equipment from the original manufacturer.
  • Operating conditions of a detail: chemically aggressive drilling mud, abrasive influence, shock mechanical influences.
  • Characteristics of a detail without coating: The case of a rezistivimetr is made of non-magnetic stainless steel in the form of a pipe with the internal hidden channels with electric conducting. On the case there are antennas, closed with a compound and protective grids, and beams with electronic components under them.
  • Characteristics:
    • Hardness is about 50 HRC.
    • Length - 4.42 m, diameter - up to 127 mm.
    • Weight – 376 kg.
    • Material is P550 non-magnetic stainless steel.
  • The parameters of the wear-resistant protrusions: the substrate is stainless steel, the top of the platform is a wear-resistant material.Contains internal hidden channels with wiring and electronic boards (you can not overheat above 150 degrees C).
  • Solution: Repair of the wear-resistant areas of the rock resistivity recording device (resistivity measurement). Removing the old coating mechanically, laser cladding with powder Plakart 01.18-PT on the Inconel sublayer.

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