Turbine type flow sensor for oil field well cementing

Abstract

The invention discloses a turbine flow sensor used in well cementing of an oil field. The turbine flow sensor consists of a sensor body, a through-shaft turbine assembly, an inlet flow guide frame, an outlet flow guide frame, an inlet joint and an outlet joint. The sensor body is a cylindrical metal tube; the through-shaft turbine assembly comprises a turbine, a turbine shaft, a shaft sleeve, steel balls, a steel ball cushion, an adjusting bolt, a spring retaining ring and a lock nut; the through-shaft turbine assembly is fixed in the sensor body by the inlet flow guide frame and the outlet flow guide frame; the inlet joint and the outlet joint are respectively a detachable structure and are hermetically connected with two ends of the sensor body by screw threads; and the sensor body is provided with a signal amplifier interface. The turbine flow sensor has the advantages of having high concentricity, tiny measurement error, simple structure and low fabrication cost by using the through-shaft turbine assembly, achieving fast and convenient disassembly by using the detachable interface, greatly prolonging the service life by the shaft sleeve made of polyurethane, accurately monitoring the flow rate of the injected slurry and assuring the quality of the well cementation by accessing a signal detection amplifier and a secondary instrument which are set according to a magnetic force line cutting principle.

Description

(1) Technical field [0001] The invention relates to a flow sensor, in particular to a turbine flow sensor for oil field cementing. (2) Background technology [0002] In oilfield exploration and development, every exploration and development of an oil well, from exploration to final cementing, it is necessary to inject mud into the casing and use the mud to seal the casing well, so as to ensure the service life of oil and gas development. Accurate measurement of the flow rate of injected mud is related to the cementing quality of each well. At present, the installed turbine flow sensor usually uses a half-shaft turbine assembly. During the cementing mud metering process, due to the non-concentric half-shaft turbine assembly, it is easy to cause measurement errors, thereby affecting the cementing quality. (3) Contents of the invention [0003] The object of the present invention is to solve the above existing problems, and provide a turbine type flow sensor for oilfield cem...

AI Technical Summary

Problems solved by technology

At present, the installed turbine flow sensor usually uses a half-shaft turbine assembly. During the cementing mud metering process, due to the non-concentric half-shaft turbine assembly, it is easy to cause measurement errors, thereby affecting the cementing quality.

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