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Alarming method by monitoring shutdown of pumping machine based on acceleration sensor

A technology of acceleration sensor and pumping unit, which is applied in speed/acceleration/impact measurement, acceleration measurement, instruments, etc., can solve the problems of consuming human resources, affecting the efficiency of pumping, and not being able to find them, so as to save human resources and improve pumping The effect of oil efficiency

Inactive Publication Date: 2012-11-28
洛阳乾禾仪器有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Pumping units widely used in oil fields mainly include beam pumping units, double donkey head pumping units, short pumping units, etc. When these pumping units are working, the donkey heads or beams are always in a swinging or rotating motion status, in order to timely detect the downtime of the pumping unit due to failure, and to deal with it and start the oil in time, there are usually tube wells or well patrol personnel to observe the working status of the pumping unit, which not only consumes human resources, but also often cannot Timely detection during shutdown will affect pumping efficiency

Method used

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  • Alarming method by monitoring shutdown of pumping machine based on acceleration sensor
  • Alarming method by monitoring shutdown of pumping machine based on acceleration sensor
  • Alarming method by monitoring shutdown of pumping machine based on acceleration sensor

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Such as figure 1 The pumping unit shutdown monitoring and warning method based on the acceleration sensor of the present invention comprises the following steps:

[0024] (1) Set the initial position as the midpoint of the stroke movement of the sucker rod, and set the calculation period t of the displacement change and the sampling frequency f of the acceleration A ;

[0025] (2) periodically sampling the acceleration signal of the sucker rod of the pumping unit;

[0026] (3) A / D conversion is performed on the collected acceleration signal to obtain corresponding acceleration data;

[0027] (4) Judging whether the collected acceleration signal is a noise signal, if it is a noise signal, then read again, if it is a normal signal, then save the data;

[0028] (5) Based on the speed of the sucker rod corresponding to the initial moment of the period and the sampling data of each acceleration, the displacement variation in the period is calculated by the integral method...

Embodiment 2

[0046]The difference with embodiment one is: in the step (6) of the oil pumping unit shutdown monitoring alarm method based on the acceleration sensor, the method for grouping judgment is adopted to the displacement variation, as image 3 As shown, the displacement change used for the current judgment is ΔD i and ΔD i-1 , the displacement change used in the last judgment is ΔD i-2 and ΔD i-3 , and so on, the displacement change used in the previous judgment is ΔD i-4 and ΔD i-5 . Other parts are all the same as in Embodiment 1.

[0047] Since the data sources used in each judgment are different, the accuracy of the judgment is increased.

Embodiment 3

[0049] The difference with Embodiment 1 is: in the step (6) of the oil pumping unit shutdown monitoring and alarm method based on the acceleration sensor, the displacement variation in the adjacent three calculation cycles is compared with the minimum threshold value of the setting respectively, To judge whether the sucker rod of the pumping unit stops working. Such as Figure 4 As shown, the displacement change used for the current judgment is ΔD i , ΔD i-1 and ΔD i-2 , the displacement change used in the last judgment is ΔD i-1 , ΔD i-2 and ΔD i-3 , and so on, the displacement change used in the previous judgment is ΔD i-2 , ΔD i-3 and ΔD i-4 . Other parts are all the same as in Embodiment 1.

[0050] Using three adjacent displacement variations to participate in the judgment loses a certain amount of real-time performance, but improves the accuracy and stability of the judgment.

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Abstract

The invention relates to an alarming method by monitoring shutdown of a pumping machine based on an acceleration sensor. The acceleration signal of a pumping rod of the pumping machine is collected according to the specified frequency, the changing amount of the displacement of the pumping rod is periodically calculated within the corresponding period after the processing of noise elimination andA / D conversion, at least two changing amount of displacements in the adjacent periods are compared with the specified minimum threshold respectively, thus judging whether the pumping machine is stopped or not; therefore, the accurate alarming is realized when the pumping machine is stopped, the manpower resource is saved, and the pumping efficiency of the pumping machine in indirectly improved simultaneously.

Description

technical field [0001] The invention relates to a well stop monitoring method of an oil pumping unit, in particular to an acceleration sensor-based well stop monitoring and alarm method for an oil pumping unit. Background technique [0002] Pumping units widely used in oil fields mainly include beam pumping units, double donkey head pumping units, short pumping units, etc. When these pumping units are working, the donkey heads or beams are always in a swinging or rotating motion status, in order to timely detect the downtime of the pumping unit due to failure, and to deal with it and start the oil in time, there are usually tube wells or well patrol personnel to observe the working status of the pumping unit, which not only consumes human resources, but also often cannot Timely detection during shutdown will affect oil pumping efficiency. Contents of the invention [0003] The object of the present invention is to provide a pumping unit shutdown monitoring and alarm metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00E21F17/18G01P15/00
Inventor 庞永星王海姚辰安桂生王剑庞楹常玉国陈飞飞
Owner 洛阳乾禾仪器有限公司