Product Structure:

Work Principle:

The hollow rod electric heating system inserts a cable into the inner hole of the hollow sucker rod and forms a loop with the hollow rod body. It passes alternating current of different frequencies and uses the internal skin effect to generate heat energy on the hollow rod wall . Through heat conduction, it heats the inside of the oil pipe. The crude oil is heated throughout the process to increase the temperature of the crude oil in the oil pipe, reduce the viscosity of the crude oil, and improve its fluidity, so as to effectively exploit high-viscosity, high-freezing-point, and high- wax crude oil. When the inner cable of the hollow sucker rod is supplied with alternating current, an internal skin effect occurs. Current flows on the inner wall of the hollow rod and there is basically no current on the outer wall. It can be regarded as an insulator to ensure work safety. See picture When the inner cable of the hollow sucker rod is supplied with alternating current, an internal skin effect occurs. Current flows on the inner wall of the hollow rod and there is basically no current on the outer wall. It can be regarded as an insulator to ensure work safety.

Technical parameters:

Product Characteristic:

1. Good corrosion resistance, can withstand the corrosion of most chemicals;

2. Good flexibility, can be bent at will and will not be brittle;

3. Good pressure resistance;

4. Easy to install.

Special medium frequency power supply for oil well

The intermediate frequency power supply is the core part of intelligent intermediate frequency electrothermal oil recovery technology and complete equipment. The intermediate frequency power supply is a device that uses a power electronic device -IGBT to convert the industrial frequency power supply into an intermediate frequency power supply. Compared with the industrial frequency power supply, the eddy current induction is strengthened, resulting in stronger skin effect, better proximity effect, and less magnetic flux leakage, so the heating effect is much higher than that of the industrial frequency power supply.

The intermediate frequency power supply is a power supply device that converts three-phase into single-phase and industrial frequency into intermediate frequency. It can provide a power source for oil and gas production such as hollow sucker rod electrothermal oil production and skin effect electric heat tracing.

Work Principle

This equipment converts 380V 50HZ AC power into DC power after three-phase bridge rectification and filter, then invert it into 500~1000HZ single-phase AC power, which is transmitted to the load through an intermediate frequency transformer. The system composition principle is shown in the figure:

Product Model:

Note: DRZP is the product code, which is the inter mediate frequency power supply; 1 is the product design sequence number; 100 means the power level is 100kVA.

Product Parameter

(1) Main performance

1. Temperature closed loop: automatically changes the heating power according to the oil wellhead temperature to achieve energy-saving operation.

2. Short circuit protection function: heating cable short circuit, rapid shutdown protection, the red LED on the main control board lights up and the yellow "alarm" light on the panel also lights up to indicate a fault.

3. IGBT over-temperature protection: when the temperature of the heat sink exceeds the rated range, the heating power is reduced to the minimum. Within the delay time, the temperature returns to the rated range and the automatic soft start returns to the power before protection.

Otherwise, the main control board will stop quickly. The blue LED on the panel lights up and the yellow "alarm" light on the panel also lights up to indicate a fault.

4. Overcurrent protection function: If the actual input current, that is, the current value displayed on the input ammeter exceeds the set maximum input current allowable value, the machine will stop quickly. The yellow LED on the main control board will light up and at the same time, the yellow "alarm" light on the panel will also light up as a reminder. failure.

5. Circuit break protection function: The heating cable is disconnected and quickly shuts down for protection. The green LED on the main control board lights up and the yellow "alarm" light on the panel also lights up to indicate a fault.

(2) Environmental conditions for use

Relative humidity: ≤90%; Storage temperature: -30~+60℃; Usage location:indoors and outdoors.

Main Parameter:

Allowable values for parameter changes: frequency: ±5% of rated value voltage: ±10% of rated value

Intelligent power frequency control system

Special distribution box for intelligent power frequency control system. It can be used indoors and outdoors. The box body is made of cold-rolled steel plate or stainless steel. The system has functions such as automatic temperature control, overload, short circuit and leakage protection, and voltage regulation.

Note: DRGP is the product code, which is the power frequency; 1represents the product design sequence number; 100 means power level 100kVA.

Main Technical Parameter:

Power incoming voltage: AC380V/50HZ, using TN-S grounding system;

Power outlet voltage: AC380V/220V 50HZ;

Rated current: 63A--300A;

Temperature control performance: using intelligent temperature controller, the measurement accuracy is 0.2 level and the temperature measurement probe uses WZ series PT-100 platinum thermal resistor;

Protection performance: use air switch with leakage protection, short circuit protection, etc.