Laser perforation device and method thereof

Abstract

The invention provides a laser perforation device and a method thereof and belongs to the technical field of oil and gas underground mining. The laser perforation device and the method thereof aim to solve the problems that in the prior art, perforated holes are distributed fixedly and cannot be adjusted flexibly, only round holes can be formed, mechanical shock is large in the working process, damage to pipe strings and well cementation is severe, and the reuse rate of perforating gun bodies is low. A perforator comprises a miniature high power laser device located at the top end in the perforator. A reflector is fixed to the upper end of a movement adjustment mechanism, the movement adjustment mechanism drives the reflector to do circumferential rotation movement and vertical direction movement, data are collected through a displacement sensor and an encoder, and lasers emitted by the miniature high power laser device are focused through a parallel focusing path, emitted through an emitting hole in the lower end of the perforator and then reflected through the reflector so as to conduct perforation operation. A power source supplies electricity to underground equipment, a ground control system achieves integral control, and the ground control system is connected with the displacement sensor and the encoder through data transmission lines.

Description

technical field [0001] The invention belongs to the technical field of underground oil and gas exploitation, and in particular relates to a laser perforating device and a method thereof. Background technique [0002] As the main link of well completion technology, perforation technology has a direct relationship with oil and gas well productivity. At present, the delivery methods of perforating technology are mainly divided into: wireline conveying perforating (WCP), pipe string conveying perforating (TCP), and flexible pipe conveying. The perforators are classified into: conventional perforators, ultra-deep penetration perforators, large aperture perforators (Ф14mm), high hole density perforators (20 holes / m), sand control perforators, composite perforators, etc. form. The ultimate goal of perforation is to establish a reliable and effective channel between the production layer and the wellbore, so as to obtain the maximum production effect. Perforation is the use of mec...

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Problems solved by technology

[0004] The object of the present invention is to propose a laser perforation device and its method, which solves the problems in the prior art that the perforation distribution is fixed, cannot be adjusted flexibly, and only circular holes can be formed, and the mechanical impact is relatively large during the working process, which has great impact on the pipe string and Large cementing damage and low reuse rate of perforating gun body

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