Terrestrial heat downhole water level measuring system

Abstract

The invention discloses a geothermal underground water level measuring system. A metal hammer is fixed through molybdenum wire; after the molybdenum wire passes through a reversing pulley and is wound on a winding pulley for several circles, the end of the molybdenum wire is fixed with a distance measuring pulley. A distance measuring pulley shaft is connected with a speed reducer; and a step motor is connected with a shaft of the speed shaft. The startup, the stoppage and the rotating direction of the step motor are controlled through a control system. The speed reducer and the distance measuring pulley are connected in order that the distance measuring pulley produces moment; thus, when power is cut off, the position of the metal hammer is kept unchanged. The metal hammer and a well measuring tube form two electrodes; when the metal hammer is contacted with the water surface, a circuit is switched on, and the control system can calculate the length of the molybdenum wire wound on the distance measuring pulley according to a pulse signal emitted by a sensing switch of the distance measuring pulley, thereby determining the position of the water surface of the underground well. All the measuring and controlling devices are positioned on the ground; and the system does not need to mount any electronic testing probe underground and can effectively solve the problem that the testing probe is easy to damage caused by high temperature of geothermal water, strong corrosion and untight sealing of the probe.

Description

technical field [0001] The invention belongs to the detection technology of electromechanical integration, and in particular relates to an underground dynamic and static water level measuring device of a geothermal well. Background technique [0002] At present, the utilization of geothermal resources is an important energy-saving technology. However, in the development and utilization of geothermal resources, the measurement method of geothermal well water level is relatively backward. For example, the current manual test measurement method: use about 8mm iron tip (probe), one side is connected by a wire, sink down along the logging pipe or wellbore to touch the water level, the other end of the wire is connected to the ammeter, as a metal probe When the water level is touched, the ammeter is switched on, and then the depth of the geothermal water level is obtained by measuring the length of the wire. Although the method is simple to operate, it requires manpower and cann...

AI Technical Summary

Problems solved by technology

Although this method does not need to place probes downhole, most of the wellheads are not well sealed, and the gas leaks very quickly, requiring frequent replacement of gas cylinders, making maintenance difficult

Moreover, when it is necessary to maintain the wellhead equipment, it is necessary to dismantle the inflation pipe, which will prolong the working time of the lifting and lowering pumps, which is difficult for users to accept.

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