Method for controlling tower-type pumping unit

A technology for a tower pumping unit and a control method, which is applied in the directions of earth-moving drilling, fluid production, wellbore/well components, etc., can solve the problems of stroke error, frequent wire rope damage, large error, etc., and achieve the effect of reducing belt slippage

Active Publication Date: 2010-10-27
上海神源电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are multiple methods for controlling the above-mentioned tower pumping unit, but these methods cannot solve the following problems: 1, the wire rope is damaged frequently, and it is very complicated and troublesome to replace the wire rope
2.

Method used

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  • Method for controlling tower-type pumping unit
  • Method for controlling tower-type pumping unit
  • Method for controlling tower-type pumping unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] like figure 2 As shown, it is an overall flowchart of a control method for a tower pumping unit provided by the present invention, and its steps are:

[0033] Step 1. The tower pumping unit is initialized after power-on. After power-on, set the parameters that need to be initialized to the initial value, such as clearing the counter D300 to be used in step 12, etc.; after power-on and initialization, read the last power failure With memory parameters, read the state of the EEPROM parameters saved in the last power failure, so that the system control mode is consistent with the last time.

[0034] Step 2. Read the pre-set parameters and check the status of each input and output interface, and then the system performs self-test;

[0035] Step 3. Calculate and set up and down stroke frequency and inverter acceleration and deceleration time;

[0036] like image 3 Shown is the principle explanatory diagram of the above steps, in this drawing, F=ma is Newton's second law...

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PUM

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Abstract

The invention provides a method for controlling a tower-type pumping unit. The method comprises the following steps of: powering-on and initializing the tower-type pumping unit; reading predetermined parameters; waiting an equipment operating signal; if the operating signal is obtained, entering the next step; performing rising work on the pumping unit for pumping oil; recording rising maximum current data D250 during rising; to an up stroke position, stopping rising the pumping unit; performing falling work on the pumping unit; recording falling maximum current data D251 during falling; to adown stroke position, stopping falling the pumping unit; and judging whether a stop signal is obtained, if not, re-circulating, and otherwise, shutting down the pumping unit. The method is characterized in that: the steps of calculating and setting an up stroke frequency, a down stroke frequency, an acceleration time and a deceleration time, and calibrating rising and falling are added into the steps. The method has the advantages that: a steel wire rope and a belt can be used for at least 6 mouths; belt creep is lightened; and an error is corrected and is controlled in a very small range.

Description

technical field [0001] The invention relates to a control method of a tower pumping unit. Background technique [0002] The pumping unit is the main oil production equipment in the oil field. The beam pumping unit accounts for more than 90% of the pumping units. Its history can be the same as that of the oil field. After a long period of development, there is little room for development in electrical and mechanical aspects. Due to the mature development of elevator technology, frequency conversion technology and control theory, the mechanical structure of the tower pumping unit refers to the elevator structure, changing the original mechanical structure of the beam pumping unit, and the electric adopts advanced frequency conversion technology and control system to achieve Intelligent pumping unit (tower pumping unit). like figure 1 As shown, the current common tower pumping unit includes oil rod and distribution box. One end of the wire rope is tied to the oil rod, and the...

Claims

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Application Information

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IPC IPC(8): E21B43/00
Inventor 姚名奇
Owner 上海神源电气有限公司
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