Magnetic-heat wax preventing device for oil production

An anti-wax and magnetothermal technology, which is used in earth-moving drilling, cleaning equipment, drilling equipment, etc., to achieve the effect of improving heating power, long service life, and improving heating efficiency

Inactive Publication Date: 2008-06-25
张国成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the heating element cost and manufacturing management cost are considered, the total cost will reach 100,000 yuan

Method used

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  • Magnetic-heat wax preventing device for oil production
  • Magnetic-heat wax preventing device for oil production
  • Magnetic-heat wax preventing device for oil production

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Experimental program
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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] Such as figure 2 As shown, the present invention includes a ring-shaped magnetic steel 3 fixed on the inner wall of the outer pipe (thickened oil pipe 13 ) and a heating pipe 6 fixed on the hollow sucker rod 4 . It can be seen from the figure that the hollow sucker rod 4 of the present invention is only located in the oil pipe section where the heating pipe part is arranged. The hollow sucker rod 4 is fixedly connected (may be welded) to a conventional sucker rod (solid structure) 8 through ribs 15 . The ring magnets 3 are separated by ring fillers 14, and the two ends of these spaced ring magnets 3 and fillers 14 are fixed by ring yokes 2. The central, high-permeability material that guides the flux lines through to reduce flux loss, can be soft magnets, pure iron, or mild steel. The magnets 3 in the present invention are neodymium-iron-boron magnets, and...

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PUM

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Abstract

The invention discloses an oil extraction magnetocaloric paraffin prevention device which comprises a heating pipe which is sleeved and fixed on a pumping rod and magnets which are closely fixed on the inner wall of an oil pipe, wherein, a metal pipe with high magnetic permeability is embedded on the inner wall of the heating pipe; the pumping rod provided with a heating pipe part is a hollow structure. The invention makes distribution of magnetic force lines generate qualitative changes through arranging the magnets by adoption of an Halbach array, namely magnetic flux of areas which need heating vortexes on sides of the heating pipe and the metal pipe is obviously increased, and magnetic flux on the side of the oil pipe is relatively sparse, thereby heating efficiency of the heating pipe is improved. The structure of the invention can change distribution of the magnetic force lines, thereby the heating efficiency is improved as much as possible.

Description

technical field [0001] The invention relates to a downhole wax removal and anti-wax device for oil production in an oil field, in particular to a magnetic-thermal wax anti-wax device for oil production. Background technique [0002] Crude oil is a complex mixture of various hydrocarbons. Crude oil in many oilfields contains paraffin. During mining, these paraffins will naturally precipitate and stick to the wall of the oil pipe. As time goes by, production will be affected, and serious blockage of the oil pipe will be caused. Therefore, anti-wax and wax removal have become important issues in oil extraction. [0003] At present, more anti-wax technologies are used, including magnetic anti-wax technology. [0004] Magnetic anti-wax is a crude oil anti-wax technology. Its main principle is to use high-performance rare earth permanent magnet materials as magnetic energy bodies to establish a stable and strong magnetic field to stimulate the paraffin molecules in crude oil flo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/00E21B17/00
Inventor 张国成
Owner 张国成
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