Perforation angle variable perforator for oil-gas well perforation

A technology of oil and gas wells and perforators, which is applied in the direction of wellbore/well components, production fluid, earthwork drilling and production, etc. It can solve the problem that the operation of variable angle cannot be performed, and the perforator cannot meet the purpose of perforating sand control in oil and gas wells, and cannot realize Problems such as oil and gas well orientation function, to achieve the effect of simple structure

Active Publication Date: 2014-01-01
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The existing perforator with conventional helical perforation cannot realize the targeted function of oil and gas well orientation
[0007] 2. The jet flow direction of the perforating charge is perpendicular to the axis of the oil and gas well, which is fixed and cannot be operated with variable angles;
[0008] 3. For oil and gas wells that produce sand, conventional perforators cannot meet the purpose of perforating sand in oil and gas wells

Method used

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  • Perforation angle variable perforator for oil-gas well perforation
  • Perforation angle variable perforator for oil-gas well perforation
  • Perforation angle variable perforator for oil-gas well perforation

Examples

Experimental program
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Effect test

Embodiment 1

[0054] As a preferred embodiment of the present invention, the present invention discloses a variable firing angle perforator for perforating oil and gas wells, which includes a modular bullet rest device 2 and a directional steel structure 3 matched with the modular bullet rest device 2, A perforating charge 7 is installed in the modular bullet support device 2;

[0055] The modular bullet support device 2 includes an upper bullet support plate 13, a lower bullet support plate 9 and two bullet support plates 10, and the upper bullet support plate 13 and the lower bullet support plate 9 are provided with holes for matching the outer diameter of the perforating charge 7. Matching bullet holes 17, the upper bullet support plate 13 and the lower bullet support plate 9 are connected and fixed by the bullet support support plate 10. The bullet support support plate 10 is connected with the hinge shaft 4 and the chute pin 11. At least one indexing fixing hole 12 is also processed on...

Embodiment 2

[0058] As another preferred embodiment of the present invention, on the basis of Example 1, the hinge shaft hole 36, the adjustment chute 35 and the arc-shaped indexing hole 37 on the orientation square structure 33 are distributed in groups, and two adjacent groups The perforation direction of the perforating charge 7 in the modular bullet rest device 2 is opposite and adjustable. There are two rows of indexing holes 37 arranged on the orientation square structure 33 . The orientation square structure 33 is plate-shaped.

[0059] Fixed ring 1 comprises circular head 38, is provided with two fixed plates 39 arranged in parallel on circular head 38, two fixed plates 39 and head 38 vertical and integrated molding, on two fixed plates 39 Pin holes 40 are processed, and the two fixing plates 39 are respectively fixed on the two directional square structures 33 via the fixing pins 5 , and steps are arranged on the circular head 38 .

[0060] Backing ring 6 comprises circular head...

Embodiment 3

[0062] As the best implementation mode of the present invention, on the basis of Example 2, there are two indexing fixing holes 12 on the bullet support plate 10 . The upper part of the perforating charge 7 is cylindrical, and the lower part is in the shape of an inverted truncated cone. A step 31 and a limiting groove 32 are provided on the lower part of the perforating charge 7 in the shape of a truncated cone. The lower bullet support plate 9 is embedded in the limiting groove 32 .

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Abstract

The invention discloses a perforation angle variable perforator for oil-gas well perforation, and relates to the technical field of well-completion practice of oil-gas well perforation. The perforator comprises a modularized bullet supporting device and a directional steel structure matched with the modularized bullet supporting device, a perforating bullet is mounted in the modularized bullet supporting device, the modularized bullet supporting device comprises an upper bullet supporting plate, a lower bullet supporting plate and two bullet supporting support plates, the directional steel structure comprises two directional square structures, a fixing ring and a backing ring, the modularized bullet supporting device is mounted between the two directional square structures, a hinged shaft of the modularized bullet supporting device is matched with hinged shaft holes in the directional square structures, a slide groove pin is matched with an adjusting slide groove, and an indexing fixing hole is matched with an indexing hole. On one hand, the jet flow direction of the perforator has a directional function; on the other hand, the jet flow direction of the perforating bullet can be controlled and has a wide-range variable angle adjusting function.

Description

[0001] technical field [0002] The invention relates to the technical field of oil and gas well perforation and completion operations, in particular to a variable firing angle perforator for oil and gas well perforation. Background technique [0003] At present, in the conventional oil and gas reservoirs explored and developed by major oil and gas fields in the world, some oil and gas wells have extremely developed natural fractures in a certain direction of the high-steep structural belt. The channels are seldom aligned with natural fractures, so that the single-well productivity of oil and gas wells is not high, and sand production wells will also be accompanied by severe sand production, which will also bring greater wellhead construction pressure to subsequent production stimulation measures, and the production stimulation effect cannot be achieved. [0004] The publication number is CN2592864, and the Chinese patent literature published on December 17, 2003 disclos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/116E21B43/119
Inventor 唐凯陈华彬陈锋郭晓燕任国辉王海
Owner BC P INC CHINA NAT PETROLEUM CORP
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