Underground electromagnetic control damping elastic centralizing device and control method

A technology of electromagnetic control and damping spring, which is applied in the direction of drilling equipment, earthwork drilling, drill pipe, etc., can solve the problems that the continuous rigid expansion and contraction of the spring cannot meet the fatigue strength, stability, and service life limit, so as to ensure the righting effect, The effect of improving the service life and stability

Inactive Publication Date: 2015-08-05
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, when the diameter of the downhole borehole is continuously changed, the continuous rigid expansion and contraction of the spring cannot meet the fatigue strength and stability under the change of the load, and the service life will be limited to a large extent

Method used

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  • Underground electromagnetic control damping elastic centralizing device and control method
  • Underground electromagnetic control damping elastic centralizing device and control method
  • Underground electromagnetic control damping elastic centralizing device and control method

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing, illustrate the specific embodiment that the present invention proposes, structure, feature and effect thereof, detailed description is as follows:

[0025] A downhole electromagnetically controlled shock-absorbing elastic centralizing device is mainly composed of a supporting connection mechanism 1, an electromagnetic control system 2 and a shock-absorbing elastic centralizing mechanism 3; the supporting connecting mechanism 1 is used to support the overall structure of the centralizing device, Matching instrument or device connection, electromagnetic control system 2 and shock-absorbing elastic centralizing mechanism 3 work together to adapt to the change of downhole pipe diameter, and can carry out continuous self-adaptive adjustment according to the vibration of the helical shock-absorbing spring 31 and the size of the elastic impact force , to avoid the centralizing device completely relying on the rigid expansion and c...

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Abstract

The invention relates to an underground electromagnetic control damping elastic centralizing device. The device is characterized by mainly comprising a supporting connecting mechanism, an electromagnetic control system and a damping elastic centralizing mechanism. The underground electromagnetic control damping elastic centralizing device can be connected to a matched underground traction apparatus or a matched logging instrument; four groups of centralizing arm units at the included angles of 90 degrees are adopted to realize the centralizing effect; the device is capable of adapting to the change of the underground pipe diameter under the combined action of the electromagnetic control system and the elastic stretching of the spiral damping spring, wherein the electromagnetic control system is capable of realizing continuous self-adaptive regulation of the vibration and the elastic impact force of the damping spring and the case that the damping of the centralizing device completely depends on the rigid stretching of the spiral damping spring, and therefore, the service life and the stability of the centralizing device can be improved and the centralizing effect can be guaranteed; the normal underground operations of the logging instrument can be prevented from being affected by the fatigue damage of the centralizing device and the like.

Description

technical field [0001] The invention relates to a downhole traction device for a horizontal well or a centralizing device for a logging instrument in petroleum exploration and development, in particular to a downhole electromagnetically controlled shock-absorbing elastic centralizing device. Background technique [0002] With the drilling technologies such as horizontal wells, extended reach wells and multi-bottom wells playing an increasingly important role in the process of oil exploration and development. In the process of oil well logging, most of them currently use drill pipes to transport downhole logging instruments, which brings a lot of inconvenience to horizontal well logging. As the length increases, it becomes more and more difficult to ensure the centering of downhole tools during the running process. [0003] When the traction device and logging instrument are lowered into the well, centralizers are generally used to improve the stability of the traction devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10
CPCE21B17/1042
Inventor 高德利张勇黄哲
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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