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Fault diagnosis method and system for electric submersible plunger pump

A plunger pump and submersible technology, which is applied in the field of fault diagnosis of electric submersible plunger pumps, can solve the problems of poor real-time performance and complicated fault diagnosis process of electric submersible plunger pumps, so as to improve real-time performance and simplify faults The effect of the diagnostic process

Active Publication Date: 2018-05-08
PETROCHINA CO LTD +1
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Problems solved by technology

[0005] In order to solve the problem that the fault diagnosis process of the electric submersible plunger pump is relatively complicated and the real-time performance is poor, the present invention provides a fault diagnosis method and system for the electric submersible plunger pump

Method used

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  • Fault diagnosis method and system for electric submersible plunger pump
  • Fault diagnosis method and system for electric submersible plunger pump
  • Fault diagnosis method and system for electric submersible plunger pump

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Embodiment Construction

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0042] An embodiment of the present invention provides a fault diagnosis method for an electric submersible plunger pump. The electric submersible plunger pump includes: a frequency conversion control cabinet arranged outside the well and a plunger pump arranged inside the well, such as figure 1 As shown, the method includes:

[0043] Step 101. When the plunger pump is turned on, the voltage transformer collects the voltage at the input terminal of the frequency conversion control cabinet, and transmits the voltage to the collection card.

[0044] Step 102, the current transformer collects the current at the output end of the frequency conversion control cabinet, and transmits the current to the collection card.

[0045] Step 103, the...

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Abstract

The invention discloses a fault diagnosis method and system for an electric submersible plunger pump, belonging to the technical field of oilfield mechanical oil recovery. The method includes: when the plunger pump is turned on, a voltage transformer collects the voltage at the input end of a frequency conversion control cabinet, and The voltage is transmitted to the acquisition card; the current transformer collects the current at the output end of the frequency conversion control cabinet, and transmits the current to the acquisition card; the acquisition card converts the voltage and current into signals, obtains a digital signal, and sends it to the acquisition device; the acquisition device is based on For the digital signal transmitted by the acquisition card, the wavelet denoising method is used to draw the power-time power diagram; the fault type diagnosis is carried out according to the power-time power diagram. The invention solves the problem that the fault diagnosis process of the electric submersible plunger pump is relatively complicated and has poor real-time performance, realizes the process of simplifying the fault diagnosis of the electric submersible plunger pump, and improves the effect of real-time performance, and is used for Diagnose faults in electric submersible piston pumps.

Description

technical field [0001] The invention relates to the technical field of oilfield mechanical oil recovery, in particular to a fault diagnosis method and system for an electric submersible plunger pump. Background technique [0002] In the process of petroleum development, the lifting technology of the electric submersible plunger pump is a set of supporting technology for the rodless lifting technology suitable for low output and low permeability oil fields. It is low cost to use the electric submersible plunger pump for oil production It is one of the important means for the long-term stable production of low-permeability oil fields. Therefore, in the working process of the electric submersible plunger pump, it is necessary to diagnose the faults of the electric submersible plunger pump in time. [0003] In the prior art, the electric submersible plunger pump includes: a frequency conversion control cabinet installed outside the well and a plunger pump installed in the well. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B51/00
Inventor 王凤山吴宁钱坤张凤武蒋召平甄威
Owner PETROCHINA CO LTD
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