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Self-generating wax prevention device and method for screw pump oil well

A screw pump and self-generating technology, applied in isolation devices, earth-moving drilling, wellbore/well components, etc., can solve the problems of high production cost, difficulty in field application and promotion, complex structure, etc., and reduce construction work. Difficulty, simple design, effect of improving safety

Active Publication Date: 2020-03-17
DAQING DANFENG PETROLEUM TECH DEV CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The structure of the invention is complicated, the production cost is high, and it is difficult to obtain on-site application and promotion

Method used

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  • Self-generating wax prevention device and method for screw pump oil well
  • Self-generating wax prevention device and method for screw pump oil well
  • Self-generating wax prevention device and method for screw pump oil well

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Embodiment Construction

[0033] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0034] Referring to Examples 1-3, the present invention mentions a self-generating anti-wax device for screw pump oil wells. Its technical solution is to include an external induction coil part and an internal magnetic field moving part, and the magnetic field moving part includes a permanent magnet 18 And magnet group carrier 17, described magnet group carrier 17 is cylinder structure, is provided with a plurality of through holes laterally, installs and fixes the permanent magnet 18 of the same direction respectively in the through hole, sets respectively at the upper and lower ends of magnet group carrier 17 There is a joint, which is connected and fixed with the ...

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Abstract

The invention relates to a self-generating wax prevention device and method for a screw pump oil well. The technical solution is to include an external induction coil part and an internal magnetic field moving part, the magnetic field moving part includes a permanent magnet and a magnet group carrier, and under the rotation of the screw pump rotor, the magnetic field moving part rotates to form an alternating magnetic field The induction coil part rotates due to the magnetic field movement part, forming an alternating magnetic field, so that the respective magnetic fluxes of multiple groups of rectangular induction coils are changed, and each generates an induced electromotive force, and then generates a current respectively, and then generates heat separately, and each rectangular induction coil generates The sum of the heat acts on the wax deposition point in the central tube to avoid wax deposition. The beneficial effect is that the cable does not need to be lowered from the wellhead, which reduces the difficulty of the construction operation and improves the safety. Compared with the power generation device in the prior art, the structure is novel and simple, easy to manufacture, and the manufacturing cost is low. area promotion.

Description

technical field [0001] The invention relates to an oil recovery wax prevention device and method, in particular to a screw pump oil well self-generating wax prevention device and method. Background technique [0002] Waxing in oil wells has been a long-standing problem in domestic and foreign oilfield exploitation. When crude oil is pumped from the underground layer to the ground, the temperature of the crude oil will drop due to the expansion of the underground gas volume, and the molecular weight of the wax in the crude oil is different. During the mining process, the oil wax will be precipitated according to the order of molecular weight due to the change of temperature, and then due to the gravitational potential energy, it will deposit on the oil pipe, making the original pipe barrel narrower, blocking the pipe, reducing the crude oil production, and even causing the oil well to shut down . [0003] At present, the commonly used oil well wax removal methods in oil fiel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B37/00E21B36/04
CPCE21B36/006E21B36/04E21B37/00E21B41/0085
Inventor 刘玉友刘森瑞陈育宁
Owner DAQING DANFENG PETROLEUM TECH DEV CO LTD
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