Three-interface measuring instrument in oil storage tank

Abstract

The invention discloses a three-interface measuring instrument in an oil storage tank and relates to the technical field of oil field gathering and transportation. The three-interface measuring instrument comprises an upper fixing piece and a lower fixing piece which are arranged in the oil storage tank. The upper fixing piece and the lower fixing piece are connected through three hollow pipes. A sensor is connected in each hollow pipe. A magnetic floater is arranged outside each hollow pipe. The sensors are connected with a single chip microcomputer selecting module. The input end of the single chip microcomputer selecting module is connected with a constant current source circuit. The output end of the single chip microcomputer selecting module is connected with an amplifying circuit. The output end of the amplifying circuit is connected with a switching circuit. The output end of the switching circuit is connected with a secondary instrument safety barrier. The output end of the secondary instrument safety barrier is connected with three liquid level displaying modules. The output end of the secondary instrument safety barrier is connected with the constant current source circuit. The three-interface measuring instrument has the advantages that three interface layers of a gas-oil interface, an oil-water interface and a water-sand interface can be detected in real time; service life is long; connecting wires are reduced, and reliability is improved; and safety and reliability are high, mounting and debugging are convenient, and maintaining workload is low.

Description

technical field [0001] The invention relates to the field of oil field gathering and transportation technology, in particular to a three-interface measuring device in an oil storage tank. Background technique [0002] The oil storage tank in the oil field gathering and transportation process is a very important equipment, which collects the substances (oil, natural gas, groundwater and sand grains) produced by all oil wells in an oil field or oil production area. If it is detected in real time, the dynamic change value of the entire production can be seen, and if its quantitative value is obtained after timely detection, the actual real output can be grasped. [0003] After these four substances enter the oil tank, under the action of gravity, natural gas, crude oil, formation water, and sand are distributed from top to bottom, forming four layers and three interfaces, which cannot be achieved by commonly used detection instruments or technologies. For real-time detection, ...

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Problems solved by technology

[0003] After these four substances enter the oil tank, under the action of gravity, natural gas, crude oil, formation water, and sand are distributed from top to bottom, forming four layers and three interfaces, which cannot be achieved by commonly used detection instruments or technologies. Real-time detection, it is reported that the most advanced isotope method can only detect the oil surface and water surface at the same time, as for the sand surface, there is nothing to do, and the measurement deviation is 10-15mm

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