Dynamic laser perforation device capable of penetrating into rock under petroleum well

Abstract

The invention relates to the technical field of oil well completion and discloses a dynamic laser perforation device capable of penetrating into a rock under a petroleum well. The dynamic laser perforation device comprises a transmission system, a ground terminal and a laser perforator; the ground terminal is connected with the laser perforator by the transmission system and comprises a laser source, a power supply, a high-pressure air chamber and a control terminal; the laser source, the power supply and the high-pressure air chamber are connected with the control terminal respectively; an optical fiber and a cable are arranged inside the transmission system; the laser perforator comprises a perforator; and a servo motor is connected with the lower side of the perforator; and the perforator comprises a perforation direction control system, a laser head stepping system and a laser head. The dynamic laser perforation device executes perforation under the petroleum well by penetrating into the rock by using high-energy laser, so the perforation depth is increased obviously; moreover, the perforation efficiency is high, the perforation direction is flexible and controllable, the permeability of the stratum is enhanced, and the yield rate of the oil well is increased greatly.

Description

technical field [0001] The invention belongs to the technical field of oil well completion, and in particular relates to a dynamic laser perforating device capable of penetrating deep into rocks in an oil well. Background technique [0002] Perforation technology belongs to a kind of oil well completion technology, which refers to opening the well pipe, cement layer and formation, and establishing a flow channel between the formation and the well pipe. The technique widely used at present is to use bullets or shaped explosives to carry out perforation operations, but this method is not easy to control the perforation direction, and it will have a compaction effect on the formation, reducing the permeability of the formation. The most important point is that this Perforation method The perforation depth is limited. These problems have been affecting the current perforating operation, limiting the increase of oil well productivity. The use of high-power lasers to carry out o...

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Problems solved by technology

[0003] In view of the defects or deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a dynamic laser perforation device that can penetrate deep into the rock of an oil well. And the technical problem that the laser head can only move in the horizontal direction, so that the perforation operation with inclined perforation channels cannot be completed. Using high-energy laser beams to ablate holes inside the rock formation, the perforation efficiency is high, the perforation depth is deep, and Can improve the permeability of the formation

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