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Laser perforation device in oil well

An oil well and laser technology, applied in installation, optics, optical components, etc., can solve the problems that optical components and gas nozzles cannot control the pitch angle of laser beam and high-pressure airflow, and the angle of perforation cannot be flexibly adjusted, so as to improve laser shooting Hole operation efficiency, effect of increasing perforation depth

Inactive Publication Date: 2013-04-24
NORTHWEST UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the optical components and gas nozzles in this device cannot adjust the pitch angle of the laser beam and the high-pressure airflow to complete the perforation operation at a specified angle, but can only control the laser beam to carry out the perforation operation in the horizontal direction, and the perforation angle cannot be flexibly adjusted

Method used

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  • Laser perforation device in oil well
  • Laser perforation device in oil well

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Experimental program
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Embodiment

[0044] refer to figure 1 with figure 2 , the device structure of this embodiment includes a laser source 20, a laser control unit 1, and a gas cleaning unit 8;

[0045] The laser source 20 used is a high-power all-solid-state laser, which is placed on the ground together with the high-pressure gas source 21 in the gas cleaning unit. The size of the well pipe limits the size and volume of the laser source, and at the same time it is more convenient to control the instrument. The high-energy laser generated by the laser source 20 is transmitted to the laser control unit 1 through the optical fiber 2;

[0046] Laser control unit 1 comprises shell 7, optical fiber 2 and the focusing lens 3 that is installed in shell 7, reflector 4 and reflector rotation control frame 5, and this reflector rotation control frame 5 is installed at the bottom of shell 7, and reflector rotation control frame A motor and a transmission device are installed in the 5, the motor is connected with the t...

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Abstract

The invention belongs to the field of well completion technology of oil well perforation, and particularly discloses a laser perforation device in an oil well. The device comprises a laser source, a laser control unit and a gas cleaning unit, wherein the laser source, the laser control unit and the gas cleaning unit are sequentially connected; the laser source generates high-energy laser; the laser control unit controls the laser beams to perform the perforation operation; the gas cleaning unit is positioned on the side surface of the laser control unit; and the high-pressure gas output by the gas cleaning unit provides a clean channel for the laser perforation operation. Compared with the prior art, the laser perforation device of the oil well has the advantages of deep perforation, accurate and controllable perforation direction and the like during the perforation operation, and can remarkably improve the formation permeability and obviously increase the oil well capacity.

Description

technical field [0001] The invention belongs to the technical field of oil well perforation and completion, and in particular relates to a laser perforation device for oil wells. Background technique [0002] Oil well perforation technology belongs to a kind of oil well completion technology, which specifically refers to opening the well pipe wall, cement layer and formation to establish a flow channel between the formation and the well pipe. The perforation techniques commonly used at present include bullet perforation, energy-concentrating perforation and so on. There are many problems in perforating oil wells using the above perforating technology. The main problems are: first, the depth of the perforation holes produced is shallow; The formation produces a compaction effect, which reduces the permeability of the formation; fourth, it may seriously damage the well pipe. Together, they limit the increase in well productivity. The use of high-power lasers to carry out oi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/11E21B43/119E21B21/16G02B7/198G02B1/11G02B1/10
Inventor 白晋涛陈浩伟张云博陆宝乐许冠军任兆玉
Owner NORTHWEST UNIV
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