Indicator diagram acquisition device and method based on electric power and balance weight

Abstract

The invention relates to an indicator diagram acquisition device and method based on electric power and balance weight. The device is mounted in a pumping unit control system and comprises an electrical parameter acquisition module, a communication module, a dead point recognition module and an industrial computer, wherein the electrical parameter acquisition module acquires running current, voltage and power of the device through a single detection component, the dead point recognition module measures a lower dead point of a pumping unit crank during moving, the communication module transmitsdata acquired by the electrical parameter acquisition module and the dead point recognition module to the industrial computer and receives a command of the industrial computer and transmits the command to an industrial computer power supply control module, the industrial computer receives data uploaded by the electrical parameter acquisition module through the communication module and runs an indicator diagram computing algorithm to output an indicator diagram. Conventional sensor measurement is replaced by computing, mounting load and displacement sensors at a horsehead, a walking beam and the like is not required, the service life is extended, operational difficulty and risk are lessened, and maintainability of the device is improved.

Description

technical field [0001] The invention relates to a comprehensive application technology for pumping wells, in particular to a device and method for collecting dynamometer diagrams based on electric power and balance weights. Background technique [0002] The suspension point dynamometer diagram is a closed graph with load and displacement as coordinates. In oilfield production, this graph is often used to judge the working status of a single oil well, calculate oil production, and judge the dynamic fluid level. It can also use the indicator graph of multiple oil wells to analyze the liquid supply capacity of the block. The dynamometer diagram is of great significance to the safe and stable production of the oil field, and is an indispensable field data. [0003] At present, the commonly used methods of measuring dynamometer diagrams all need to install equipment on the beam or the suspension point to measure the change of the position of the suspension point and the load. T...

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Problems solved by technology

[0004] In view of the disadvantages of the dynamometer sensor in the prior art, such as increasing the maintenance workload of the equipment and potential safety hazards during the use process, the problem to be solved by the present invention is to provide a device that can solve the hidden safety hazards of the dynamometer sensor installation and the difficulties in later maintenance. Device and method for acquiring dynamometer graph based on electric power and balance counterweight

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