Rotary type safety magnetic positioning logging instrument

Abstract

The invention relates to a rotary type safety magnetic positioning logging instrument. The logging instrument is formed by sequentially connecting a headstall assembly, a rotary balancing assembly anda magnetic positioning assembly. The headstall assembly comprises a torpedo spring, a torpedo spring seat, a fishing socket and a torpedo single-taper sleeve. The rotary balancing assembly comprisesa rotary upper connector, a threaded ring, a wire passing barrel, a female pin sleeve, a female pin, a single-core sliding ring, a hollow shaft, a rotary fixed connector, a rotary movable connector, abalancing shaft barrel, a balancing piston, a balancing cylinder, a pressure bearing disc and a single-core connecting base. The magnetic positioning assembly comprises an upper magnetic steel cylinder, a front magnetic outer cylinder, a coil rack, magnetic steel, a cement resistor, a lower magnetic steel cylinder and an adapter. The logging instrument integrates the functions of a safety headstall, a rotary short-circuit logging instrument and a magnetic positioning logging instrument, and is reasonable in structure, small in length, light in weight, safe and reliable, and convenient to maintain.

Description

technical field [0001] The invention relates to the technical field of petroleum logging, in particular to a rotary safe magnetic positioning logging tool. Background technique [0002] In petroleum logging, perforation, borehole coring and other operations using logging cables, three general-purpose logging tools, safety bridle, rotary short-circuit logging tool, and magnetic positioning logging tool, are required. [0003] The safety bridle has the functions of connecting the cable and the logging instrument, transmitting signals and protecting the logging cable. When the logging instrument is blocked downhole and the pulling force is close to the upper limit of the safe use of the logging cable, the tension rod in the bridle breaks and the logging After the well cable is disconnected from the logging instrument, it can go into the well safely. [0004] The rotary short-circuit logging tool has the function of connecting the logging instruments, transmitting signals and p...

AI Technical Summary

Problems solved by technology

[0006] At present, conventional safety bridles, rotary shorting logging tools, and magnetic positioning logging tools are all logging tools with a single function. They need to be assembled repeatedly during logging, and the overall length and weight of the grouped tools are also relatively large. It is the perforation operation that each well has to go down the well more than ten times or even twenty times repeatedly, resulting in a heavy workload for on-site alignment and downhole and upwell operations

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