Combined telescoping ram for logging instrument

Abstract

The invention discloses a combined telescoping ram for a logging instrument. The telescoping ram comprises a protective cap, a lower core plug, and a shell. The technical points of the invention include: the shell comprises an upper shell, a lower shell, and a herringbone crawler, wherein an upper joint is connected between the upper shell and the protective cap; a power socket is arranged in the upper joint; the power socket is connected with a motor arranged in the upper shell; the motor is provided with a transmission assembly, a pressure balancing assembly, a hole diameter potentiometer assembly, a spring assembly and a hinge assembly downward in turn along the axial direction; the hinge assembly comprises a link span and upper and lower connecting rods; the upper and lower connecting rods are connected with a backup arm and a lower control arm respectively; the backup arm is connected with a polar plate bracket; a polar plate is arranged on the polar plane bracket; the polar plane bracket and the lower shell are both hinged with an upper arm; and the lower shell is connected with the lower core plug. The telescoping ram has the advantages of great improvement on logging efficiency and quality, stable and reliable working process, wide application range, simple structure, convenient use, capability of reducing maintenance cost, and the like.

Description

technical field [0001] The invention relates to the technical field of oil field logging, in particular to a pusher for a combined logging tool that can complete borehole caliper measurement at one time. Background technique [0002] Due to the difference in geological conditions and drilling techniques, after the drill bit is withdrawn, the well wall may undergo pressure extrusion deformation, loose geological layers fall off, etc. Therefore, the oil field must first measure the change of the well diameter through the logging equipment before running the pipe. The most common equipment is the pusher, but the mechanism of the pusher is unreasonable at present, the spring force of the pusher is small and easy to rust, and the pole plate is prone to push-retract failure, which will cause logging obstruction. Contents of the invention [0003] The object of the present invention is to provide a combined logging tool pusher that can complete the borehole caliper measurement at...

AI Technical Summary

Problems solved by technology

[0002] Due to the difference in geological conditions and drilling techniques, after the drill bit is withdrawn, the well wall may undergo pressure extrusion deformation, loose geological layers fall off, etc. Therefore, the oil field must first measure the change of the well diameter through the logging equipment before running the pipe. The most common equipment is the pusher, but the mechanism of the pusher is unreasonable at present, the spring force of the pusher is small and easy to rust, and the plate is prone to push and retract failures, which will cause logging to be blocked

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