Respective drive type multifunctional caliper

Abstract

The invention discloses a respective drive type multifunctional caliper. The respective drive type multifunctional caliper comprises a motor, a pump, hydraulic oil paths, electromagnetic valve sets, hydraulic cylinders, springs, pushing rods and backup arms. The motor is in transmission connection with the pump through a coupler, and each hydraulic oil path comprises a main oil path body and a branch oil path body; the pump is arranged at the upstream ends of the main oil path bodies, and the branch oil path bodies corresponding to the backup arms in a one-to-one manner are arranged at the downstream ends of the main oil path bodies in a parallel-connection manner; the electromagnetic valve sets are sequentially connected with the hydraulic cylinders with pistons inside to form execution mechanisms, and the execution mechanisms are arranged on the corresponding branch oil path bodies to be used for controlling the branch oil path bodies to be on and off and reversed; and one end of each pushing rod is connected with a piston rod, and the other ends of the pushing rods are connected with the backup arms. The motor drives the hydraulic pump to generate certain hydraulic pressure, and the electromagnetic valve sets independently control generated hydraulic branch paths and push the pistons of the corresponding hydraulic cylinders to move; the corresponding piston rods push connecting rods and indirectly push the backup arms to move, and therefore simultaneous respective drive control of the backup arms in the caliper can be achieved; and measuring is accurate and controllability is high.

Description

technical field [0001] The invention belongs to the field of well logging instruments, in particular to a split-type multifunctional caliper. Background technique [0002] A caliper is an instrument for measuring the diameter of a borehole. A common caliper has three or four arms, and the ends of the caliper are stretched and close to the well wall under the action of a spring. With the change of the well diameter, the end of the arm also opens or closes, and at the same time drives the potentiometer to move, so the change of the well diameter becomes the change of the resistance, and the signal is processed by the circuit, and finally transformed into the change of the well diameter. Measurements. Hole caliper data are very important for comprehensively judging lithology, interpreting other logging curves and calculating the amount of cement for cementing. In existing logging operations, the borehole diameter is the data that must be measured. The measurement of other im...

AI Technical Summary

Problems solved by technology

The measurement of other important data, which is also very important, is often not located in the middle of the borehole or close to the borehole wall due to the influence of well conditions, thus affecting the actual measurement data

In the prior art, the caliper measurement instrument only has a single function of caliper measurement, and its push arm cannot be actively controlled, so it cannot assist other instruments to complete centering, eccentricity and other actions

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