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A motor protector and a pipe string containing it

A motor protector and pipe string technology, applied in drill pipe, casing, wellbore/well components, etc., can solve problems such as damage to the motor protector, and achieve the effect of improving service life

Active Publication Date: 2022-04-01
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual production process, it is often found that the motor protector is often damaged

Method used

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  • A motor protector and a pipe string containing it
  • A motor protector and a pipe string containing it
  • A motor protector and a pipe string containing it

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with accompanying drawing.

[0030] figure 1 A tubing string 100 according to the invention is shown. Such as figure 1 As shown, the tubing string 100 includes a tubing 1 and a motor protector 2 . Wherein, the oil pipe 1 plays the role of connecting other components and transporting oil. The motor protector 2 is arranged at the lower end of the tubing 1 for protecting the motor of the electric submersible pump of the tubing string 100 . The motor protector 2 has an inhalation port 21 and an exhalation port 22 . After the pipe string 100 is lowered into the well, the motor protector 2 maintains pressure balance by sucking or removing liquid, and then works normally. Specifically, when the temperature of the electric submersible pump motor rises, the motor protector 2 discharges liquid through the exhalation port 22; In the actual oil production process, the motor protector 2 is often damaged and a...

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Abstract

The invention provides a motor protector and a pipe string containing the same. The motor protector includes a suction port and a communication pipe sealed at the suction port. The free end opening of the communication pipe can communicate with the outside world, so that the motor protector It can communicate with the thin oil area, so as to prevent the heavy oil from blocking the suction port, thereby improving the service life of the motor protector.

Description

technical field [0001] The invention relates to the technical field of downhole tools for oil and gas wells, in particular to a motor protector and a pipe string containing it. Background technique [0002] In the process of oil extraction, the pipe string with electric submersible pump and multi-stage centrifugal pump is lowered into the oil well, and the electric energy is transmitted to the downhole motor through the ground transformer, control cabinet and power cable to drive the centrifugal pump to rotate, so that the downhole liquid Lift to the ground. At present, the electric submersible pump has been used as an important oil recovery method in oilfield production due to its large displacement, high efficiency, small footprint and convenient management. In order to ensure the normal operation of the electric submersible pump, a motor protector is provided outside the motor of the electric submersible pump. In the actual production process, it is often found that the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00E21B17/00
CPCE21B43/128E21B17/00
Inventor 赵海洋任向海王雷许强任波焦保雷彭振华张园丁雯赵元夏新跃郭斌钟敏李婷婷柏森
Owner CHINA PETROLEUM & CHEM CORP