Heat tracing ejector

Abstract

The invention provides a heat tracing ejector. The heat tracing ejector comprises an upper joint 1, a shell 3, a framework 2, a motor 4, a screw rod and nut assembly 5, a lock releasing device 6, a push-pull device 8, a middle joint 7, a spring 9, a piston 11, a heat insulation bin shell 10, a heater 13, a balancing pole 14, an ejection head 12 and a lower joint 15. The lower end of the upper joint 1 is connected with the shell 3, the framework 2 is fixed inside the shell 3, the middle joint 7, the heat insulation bin shell 10 and the ejection head 12 are sequentially connected below the shell 3, and the lower joint 15 is connected to the lower end of the ejection head 12. The motor 4, the screw rod and nut assembly 5, the lock releasing device 6 and the push-pull device 8 are sequentially connected below the framework 2, and the push-pull device 8 axially penetrates the middle joint 7 to be downwards and sequentially connected with the piston 11 and the balancing pole 14. The heat tracing ejector has the advantages of compact structure, convenience in use and maintenance and high applicability, and the problem of low tracing well log measurement accuracy caused by overlong ejection time is effectively solved.

Description

technical field [0001] The invention relates to the field of well logging instruments, in particular to a thermal tracer injector used in oil field tracer flow logging. Background technique [0002] Tracer flow logging is widely used in oilfield production logging. The working principle is to inject tracer into the well through a tracer injector, measure the distance of tracer flowing with the liquid in the well per unit time, and calculate The flow rate of the liquid, and then calculate the flow rate. [0003] A traditional tracer injector is composed of a casing, a skeleton, a control circuit, a geared motor, a screw nut, a push rod piston, and the like. When working, the tracer is manually loaded on the ground in advance, and after it is lowered into the oil well, the deceleration motor is driven by the ground power supply to drive the piston to move and inject the tracer. Due to the slow movement of the piston, the tracer is slowly sprayed into the well. An effective m...

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to address the shortcomings of traditional tracer injectors, and propose a new type of thermal tracer injector to solve the problems of radioactive pollution and slow injection speed of tracers in the prior art, which cause the problem of decreased measurement accuracy

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