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A Viscosity Reducing Heating Device for Viscous Oil

A heating device and viscosity reduction technology, applied in isolation devices, wellbore/well components, and production fluids, etc., can solve problems such as uneven heating, equipment failure, and low heat-resistant temperature, achieve uniform and efficient transmission, and improve use. Longevity and efficient heat transfer

Active Publication Date: 2021-03-19
ANHUI ANZE ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, heavy oil electric heating viscosity reduction is mainly divided into two types: integral heating cable and split heating cable; the integral heating cable is mainly used for oil well heating, the maximum depth is 2000 meters, and the heating cable is bound to the outer wall of the sucker rod; but the heating cable The heat-resistant temperature of the insulating layer is less than 200°C; and due to long-term use, the organic insulating layer is gradually aging, which is likely to cause equipment failure
The split heating cable is mainly used for heat preservation of ground pipes. Because the heating cable is insulated with organic matter, the heat-resistant temperature is low; at the same time, as the cable lengthens, the voltage at the end of the heating cable decreases and the heating is uneven.

Method used

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  • A Viscosity Reducing Heating Device for Viscous Oil
  • A Viscosity Reducing Heating Device for Viscous Oil
  • A Viscosity Reducing Heating Device for Viscous Oil

Examples

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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the present invention provides a heavy oil viscosity reduction heating device, including a heating cable 10, one end of the heating cable 10 extends into the oil well 1 and abuts against the wall of the oil pipe 20, and the other end extends out of the oil well 1 and forms a circuit with the power supply unit, and a transformer 30 is also provided between the power supply unit and the heating cable 10;

[0028] The heating cable 10 as a whole is in the shape of a flat belt, and the core wires 11 of the heating cable 10 are arranged side by side at intervals and match the curvature of the wall of the oil pipe 20 .

[0029] Further, such as Figure 5 As shown, the core wire 11 of the heating cable 10 is reciprocally laid four times along the length direction of the oil pipe 20 and the input end and output end of the core wire 11 protrude from one end of the heating cable 10 .

[0030] Further, the cable core wire 11 constituting the heating ca...

Embodiment 2

[0036] This embodiment is basically the same as the heavy oil viscosity reducing heating device in Embodiment 1, the difference is that in combination with image 3 As shown, the heating cable 10 is laid along the length direction of the oil pipe 20 and is clamped on the outer pipe wall of the oil pipe 20 by the fixing clip 60, and the rest remain unchanged.

Embodiment 3

[0038] This embodiment is basically the same as the heavy oil viscosity reducing heating device in Embodiment 1, the difference is that in combination with Figure 4As shown, the heating cable 10 is wound around the outer wall of the oil pipe 20 along the length direction of the oil pipe 20 and fixed by the fixing clip 60 .

[0039] The winding spacing of the heating cables 10 gradually decreases from the depth of the oil well 1 to the well head.

[0040] The thick oil viscosity reduction heating device provided by the present invention realizes the heating and viscosity reduction of heavy oil with relatively low heating power, avoids long-term operation of heating equipment at high power, and improves the service life of the equipment.

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Abstract

The invention relates to the technical field of oil processing, in particular to a heavy crude visbreaking heating device. The heavy crude visbreaking heating device comprises a heating cable. One endof the heating cable extends into an oil well and is attached to the pipe wall of an oil pipe, the other end of the heating cable extends out of the oil well and a loop is formed by the other end ofthe heating cable and a power supply unit, and a transformer is further arranged between the power supply unit and the heating cable; and the whole heating cable is in a flat-tape shape, and cable core wires of the heating cable are parallelly arranged at intervals and matched with the radian of the pipe wall of the oil pipe. According to the heavy crude visbreaking heating device, the flat-tape-shaped heating cable is attached to the pipe wall of the oil pipe, it is ensured that heat energy is evenly and efficiently transmitted into heavy crude of the oil pipe, the heavy crude viscosity is reduced, and smooth mining of the heavy crude is ensured; and meanwhile, efficient heat transferring of the flat-tape-shaped heating cable can overcome the defect that an existing heating cable needs high power to achieve heavy crude heating, the situation that the heating cable operates under the high power for a long time is avoided, and the service life of the heating device is prolonged.

Description

technical field [0001] The invention relates to the technical field of petroleum processing, in particular to a viscous reducing heating device for heavy oil. Background technique [0002] my country's heavy oil reservoirs are widely distributed, with many types, and the burial depth varies greatly, generally in the range of 2000-5000 meters; the viscosity of crude oil on the ground is as high as 1×10 4 ~1000×10 4 mPa·s, during the lifting process of crude oil, as the pressure and temperature in the oil well gradually decrease, the viscosity of the crude oil gradually increases and cannot flow; the existing heavy oil viscosity reduction mainly uses steam huff and puff, steam flooding, burning oil layers, and chemical reduction. Viscous method is the main method; oil production efficiency is slow. The existing technology utilizes the characteristic that the viscosity of crude oil is sensitive to temperature changes, and uses a heating cable to heat the heavy oil so as to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/24E21B36/04
Inventor 程乃亮李义军隗娜
Owner ANHUI ANZE ELECTRIC
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