Eccentering arm hydraulic loop device for through-casing resistivity logging instrument for petroleum well

@inproceedings{2006EccenteringAH,
  title={Eccentering arm hydraulic loop device for through-casing resistivity logging instrument for petroleum well},
  author={吴金云 and 包德州},
  year={2006}
}
The invention relates to an under-well detecting device which is used in oil development. The invention comprises a alternative motor, a axial post piston pump, a safe valve, a check valve, a oil feeding valve, a two-state three-way closed electromagnetic valve, a two-state three-way open electromagnetic valve, a two-state two-way closed valve, a hydraulic cylinder, and a piston. It can apply the over-sheath electric resistance detecting device with the temperature of 175Deg. C, and the… CONTINUE READING

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