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Petroleum underground laser perforation well completion device

A kind of oil well and laser technology, which is applied in the direction of wellbore/well components, production fluid, earthwork drilling and production, etc., can solve the problems of low perforation efficiency, lower laser perforation operation efficiency, formation compaction effect, etc., and achieve improvement Operation efficiency and the effect of improving laser perforation operation efficiency

Inactive Publication Date: 2013-06-12
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, bullets or shaped explosives are commonly used to perforate oil wells, but these methods have shallow perforation depths, uncontrollable perforation directions, and will have a compaction effect on the formation, resulting in a decrease in the permeability of the formation
These problems have always affected the perforation and completion operations of oil wells, limiting the increase in oil well productivity
However, there is only one set of optical elements to control the laser in this device, and the perforation efficiency is not high
In addition, when the device is used for perforating operations, the complex environment downhole and the sundries generated during perforating will affect the laser, reducing the efficiency of laser perforating operations

Method used

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  • Petroleum underground laser perforation well completion device
  • Petroleum underground laser perforation well completion device
  • Petroleum underground laser perforation well completion device

Examples

Experimental program
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Effect test

Embodiment

[0054] refer to Figure 1 to Figure 3 , the device in this embodiment includes a laser source 1, a high-pressure gas source 2 and a downhole laser perforator 3,

[0055] The laser source 1 and the high-pressure gas source 2 are located on the ground. On the one hand, it avoids the influence of the complex downhole environment on the instrument, and on the other hand, it eliminates the limitation of the size of the well pipe on the size and volume of the instrument. solid-state lasers.

[0056] The downhole laser perforator 3 includes a rotary controller 5 and four sets of laser perforation devices 4, wherein:

[0057] Four sets of laser perforating devices are connected in sequence along the longitudinal direction;

[0058] The rotation controller 5 is installed on the laser perforating device at the bottom of the downhole laser perforating device 3; in order to maintain the stability of the downhole laser perforating device 3 during operation, a laser perforating device 4 o...

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Abstract

The invention belongs to the technical field of oil well completion device, specifically relating to a petroleum underground laser perforation well completion device. The device mainly comprises a laser light source, a high pressure gas source and an underground laser perforator. The laser source is capable of producing high energy lasers, and the underground laser perforator comprises at least two sets of laser perforation devices which are connected with each other in sequence, wherein each set of laser perforation device is responsible for petroleum underground single-hole perforation work; and after being effectively combined, the two sets of laser perforation can control multi beam high energy lasers simultaneously so as to perform petroleum underground laser perforation work. The device has great perforation depth, is flexible and controllable in perforation direction, enhances stratum permeability, has high perforation efficiency, and improves the oil well productivity obviously.

Description

technical field [0001] The invention belongs to the technical field of oil well completion, and in particular relates to a laser perforation completion device for oil wells. Background technique [0002] Petroleum downhole perforation technology belongs to a kind of oil well completion technology, specifically refers to opening the well pipe, cement layer and formation, and establishing the flow channel between the formation and the well pipe. At present, methods such as bullets or shaped explosives are commonly used to perforate oil wells, but these methods have shallow perforation depths, uncontrollable perforation directions, and will have a compaction effect on the formation, resulting in a decrease in the permeability of the formation. These problems have always affected the perforating and completion operations of oil wells, limiting the improvement of oil well productivity. The use of high-power lasers to carry out oil well perforation operations can effectively solv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/116
Inventor 白晋涛张云博许冠军陈浩伟陆宝乐任兆玉
Owner NORTHWEST UNIV
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