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

A technology of resistivity logging and casing passing, which is applied to fluid pressure actuation devices, electrical/magnetic detection and measurement for logging records, etc. Force can not be controlled and other problems, to achieve the effect of large output force, compact structure and improved design structure

Active Publication Date: 2007-12-19
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the long length of the original technical instrument, the deficiencies of the parking position of the electrode arm and the uncontrollable pushing force

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0014] Embodiment: refer to accompanying drawing. In the cylindrical housing of the through-casing resistivity logging tool, the AC motor is connected to the axial piston pump (2), and the outlet of the axial piston pump (2) is connected to the check valve (4), and through the check valve (4) Connect the two-position three-way normally open solenoid valve (7). The two-position three-normally open solenoid valve (7) is connected to the B port of the hydraulic cylinder (9). A hydraulic safety valve (3) and an oil filling valve (5) are connected on the pipeline between the check valve (4) and the two-position three-normally open solenoid valve (7). A two-position three-normally closed solenoid valve (6) and a two-position two-normally closed solenoid valve (8) are connected in series between the check valve (4) and the two-position three-normally open solenoid valve (7). The normally closed solenoid valve (8) is connected to the A port of the hydraulic cylinder (9) to form a hy...

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PUM

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Abstract

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 pressure of 120MPa. The invention can generate hydraulic pressure to push the detector of well-detecting device to cling the well wall, and the piston can be controlled at any position of designed distance and the pushing force can be adjusted.

Description

technical field [0001] The invention relates to the technical field of well logging in petroleum industry exploration and development. The utility model relates to a downhole tool for petroleum electrical logging, in particular to a hydraulic circuit device for a pusher of a through-casing resistivity logging instrument. The device can generate hydraulic pressure under the conditions of temperature 175°C and pressure 120MPa to push the sensor probe of the logging tool close to the well wall, and the piston can be parked at any position within the designed stroke to realize the adjustment of the pushing force. Background technique [0002] The hydraulic circuit device is an important part of the through-casing resistivity logging tool. The through-casing resistivity logging tool pushes the measuring electrode against the inner wall of the casing through the push arm in the casing, and uses different power supply measurement methods to obtain the resistivity value of the form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B11/02E21B47/00G01V3/24E21B49/00
Inventor 吴金云包德洲
Owner BC P INC CHINA NAT PETROLEUM CORP
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