Electronic control system of electric workover rig

An electric workover rig and workover technology, applied in the direction of AC motor control, control system, electrical components, etc., to reduce pollution, ensure the safe operation of power supply, and achieve the effect of unit power factor

Inactive Publication Date: 2015-04-22
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] An embodiment of the present invention provides an electric control system for an electric workover rig to solve the technical problems existing in the electric control system for an electric workover rig in the prior art

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  • Electronic control system of electric workover rig
  • Electronic control system of electric workover rig
  • Electronic control system of electric workover rig

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] In order to overcome the problems existing in the prior art of electric workover rigs, an embodiment of the present invention proposes an energy storage battery with a PWM (Pulse Width Modulation, pulse width modulation) rectifier and a bidirectional DC / DC (direct current to direct current power supply) converter An energy storage DC bus electric workover electromechanical control system and a control method thereof. In order to make full use of the pow...

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Abstract

The invention provides an electronic control system of an electric workover rig. The electronic control system comprises a pulse-width modulation (PWM) rectifier, an energy storing battery, a bidirectional direct current-direct current (DC / DC) converter, a variable frequency inverter, a controller, a hydraulic system and a pneumatic system. The PWM rectifier is connected with a well field transformer and used for outputting constant voltage or constant current. The variable frequency inverter is connected with the PWM rectifier and used for driving an electric motor to operate in a loading mode. The energy storing battery is connected to a direct current bus between the variable frequency inverter and the PWM rectifier through the DC / DC converter, wherein the DC / DC converter is used for controlling charging and discharging functions of the energy storing battery and outputting bidirectional stable voltage. The hydraulic system and the pneumatic system are connected to an alternating current bus between the PWM rectifier and the well field transformer and used for loading. The controller is used for being connected with the PWM rectifier, the variable frequency inverter and the bidirectional DC / DC converter, detecting diameter information of parts and controlling operation of the parts. The electronic control system of the electric workover rig can solve the existing problems including harmonic wave, load power optimal coordination distribution and energy feedback in the prior art.

Description

technical field [0001] The invention relates to oil field operation equipment, in particular to an electric control system of an electric workover machine. Background technique [0002] The workover rig is a specialized mechanical equipment for maintenance of downhole pipe strings or wellbore in oil fields, and is mainly used for lifting and lowering oil pipes, sucker rods and pumps. At present, the diesel engine is the main source of power for the workover rig operation. Diesel workover rigs are increasingly unsatisfactory due to the following disadvantages: [0003] (1) With the continuous rise of diesel prices, the cost of workover operations has been greatly increased; [0004] (2) The combustion of diesel oil will produce a large amount of harmful gas and cause environmental pollution, which is neither in line with the national industrial policy of energy conservation and emission reduction, nor in line with the requirements of environmental protection; [0005] (3) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/08
Inventor 梁志珊王树龙张文海杨姗万光芬杨海明李兴侯柳耀勇
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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