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Flexible electric heating sucker rod

A sucker rod and electric heating technology, which is applied in the direction of drill pipe, heating element shape, isolation device, etc., can solve the problems such as the increase of resistivity, and achieve the effects of reducing failure frequency, high overall strength and wide application range

Active Publication Date: 2013-11-06
沧州润涛石油设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used flexible electric heating sucker rod heating core wire mostly uses PTC resistance alloy, but when PTC resistance alloy is used as the heating element, the resistivity will increase sharply with the increase of temperature

Method used

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] Such as figure 1 , figure 2 In the shown flexible electric heating sucker rod, the center is a heating copper core wire 11, and the outer layer is a steel wire rope layer 13. Between the steel wire rope layer 13 and the heating copper core wire 11 is an insulating layer 12, and at the end of the flexible electric heating sucker rod A rigid connector 4 is provided, which can be connected to the piston of the oil well pump, and can also be connected to the weighted electric heating rod 2. The rigid connector 4 can play a role of reliable connection conduction and sealing, and the flexible electric heating sucker rod can Cut to any length as needed.

[0028] The distribution power supply of the flexible electric heating sucker rod of the present invention can adopt the IGBT frequency conversion system, such as Figure 9 As sho...

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Abstract

The invention discloses a flexible electric heating sucker rod which belongs to the technical field of oil extraction equipment in oil fields. The outer layer is a steel wire rope layer; the flexible electric heating sucker rod is characterized by comprising heating copper cores in the center; an insulation layer is arranged between the steel wire rope layer and the heating copper cores; a rigid connector is arranged at the tail end of the flexible electric heating sucker rod; and reliable conduction and connection between the flexible electric heating sucker rod and an oil-well pump piston or a weight-increasing electric heating rod through the rigid connector are realized. The flexible electric heating sucker rod is simple in structure, good in heating effect, convenient to use, safe and reliable, high in overall strength and working efficiency, obvious in economic effect, good in applicability, and particularly suitable for extraction of large-slope high-coagulation heavy oil wells, reduces the failure frequency, and saves electric energy and heat energy.

Description

technical field [0001] The invention relates to the technical field of oil production equipment in an oil field, in particular to a flexible electric heating sucker rod for an oil production device. Background technique [0002] As some oilfields in our country have entered the mid-to-late stage of exploitation, the proportion of crude oil and heavy oil has increased year by year, and oilfields have invested a lot of money and technology for the exploitation of heavy oil. At present, the main processes of heavy oil exploitation in my country include steam huff and puff, chemical viscosity reduction, electric heating and hot water circulation, etc. In order to effectively increase the permeability of heavy oil wells during drilling, when the thickness of the oil layer in the formation is constant, the effective penetration length of the oil layer has to be increased in the form of high-deviation or even horizontal wells. While solving the problem of penetration, new problems...

Claims

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Application Information

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IPC IPC(8): E21B17/00E21B17/02E21B36/04H05B3/56
Inventor 张广卿温平安乜冠征范振明赵福祥赵晋
Owner 沧州润涛石油设备有限公司
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