CN119195701A - A perforator for fracturing completion - Google Patents

Abstract

The invention relates to a perforator for fracturing well completion, and belongs to the technical field of perforation operation. The explosive device comprises an outer sleeve, an explosion fuse and an ammunition frame, wherein the ammunition frame comprises a plurality of frame bodies, the frame bodies are provided with explosion holes, perforating bullets are installed in the explosion holes, one end, close to each other, of any two adjacent frame bodies is respectively provided with a connector and an inserting block, the connector is provided with an inserting hole, the inserting blocks and the inserting holes can be in fit and are provided with sliding blocks, the outer side wall of each inserting block is provided with an annular groove, the bottom surface of each annular groove is provided with a first positioning groove and a second positioning groove which are arranged at intervals, each sliding block is inserted into each second positioning groove, each frame body is provided with an explosion fuse pressing mechanism, each explosion fuse pressing mechanism comprises a support, and a supporting sleeve for the explosion fuse to pass through is in a spiral transmission mode on each support. The frame bodies are easier to assemble, the detonating cord in the invention cannot bend at the end part of the supporting sleeve, and the detonating cord can be tightly pressed on the perforating bullet.

Description

Perforator for fracturing well completion

Technical Field

The invention relates to the technical field of perforation operation, in particular to a perforator for fracturing well completion.

Background

Fracturing completion is a key technology used for unconventional oil and gas reservoir development in the oil and gas industry, especially for low permeability oil and gas reservoirs such as shale gas, compact oil and the like. The frac completion creates a fracture by creating holes in the wall of the well and the casing and injecting a high pressure fluid to allow the oil and gas to flow more easily into the wellbore. During a fracturing completion operation, it is necessary to use a perforator to form holes in the casing and walls of the well so that subsequent fracturing fluids can enter the formation.

The prior art perforator generally includes a perforator charge and a charge holder for holding the perforator charge, such as disclosed in the patent with publication number CN220539606U, the perforator comprises a perforator body with a blind hole on the surface, a detonator arranged on the perforator body, and the perforator charge arranged in the blind hole of the perforator body. In the perforating gun, blind holes for installing perforating charges on the perforating gun main body are fixedly distributed around the perforating gun main body, when the perforating charges are installed, the perforating gun main body is required to be continuously rotated, and the installation efficiency of the perforating charges is low.

In order to solve the problem, there is a perforator with adjustable positions of perforating bullet mounting holes in the prior art, such as disclosed in patent with the publication number CN117868756B, the perforator comprises a sleeve, a detonating cord and two positioning disks, a cartridge holder is arranged between the two positioning disks, the cartridge holder comprises at least two sequentially connected holder body assemblies, each holder body assembly comprises a plurality of coaxially arranged holder bodies, each holder body is provided with a projectile hole for loading the perforating bullet, a first protruding part is arranged between every two adjacent holder bodies, the first protruding part is fixedly arranged at the end part of one holder body, a first insertion hole is formed in the end part of the other holder body facing the first protruding part, the first protruding part is movably inserted in the first insertion hole, a first spiral groove is formed in one of the outer peripheral surface of the first protruding part and the inner peripheral surface of the first insertion hole, a first sliding part is arranged on the other holder body, and the first sliding part is slidingly matched in the first spiral groove. In the device, through the cooperation of first slider and first helicla flute for when two positioning disks of drive keep away from each other, can make each support body rotate to projectile hole orientation the same direction, begin to load the perforating bullet this moment, can improve loading efficiency.

The device can improve the loading efficiency, but at the in-process of equipment each support body, owing to first slider protrusion in the inner wall of first jack, have certain interval between the terminal surface of first helicla flute and first bulge, need apply great messenger's two support bodies each other power that are close to just can make first slider pass through the lateral wall of first bulge and be pressed into first helicla flute to two support bodies during the equipment, need beat the support body with the help of other work pieces during the equipment, perhaps heat the one end that first slider was located, assemble again after making the one end hole size increase that first slider was located, it is time consuming and laborious to assemble. In the device, when each frame body rotates relatively, the detonating cord is driven to twist, so that the detonating cord bends at the end part of the positioning piece, and the conductivity and the reliability of the detonating cord are reduced.

Disclosure of Invention

The invention provides a perforating tool for a fracturing well completion, which aims to solve the technical problems that the assembly of the perforating tool in the prior art is time-consuming and labor-consuming, and a detonating cord is easy to bend during assembly, so that the conductivity and reliability of the detonating cord are reduced.

In order to solve the problems, the perforator for the fracturing completion provided by the invention adopts the following technical scheme:

The perforator for the fracturing well completion comprises an outer sleeve, detonating cords and a cartridge frame, wherein the cartridge frame comprises a plurality of frame bodies which are coaxially and sequentially connected from top to bottom, bullet shooting holes are formed in the frame bodies, a set included angle is formed between hole shafts of the bullet shooting holes on any two adjacent frame bodies, the bullet shooting holes are internally provided with perforating bullets, the detonating cords are used for being matched with the perforating bullets arranged in the cartridge frame, and the outer sleeve is sleeved on the outer side of the cartridge frame;

The end part of the inserting block is conical, an annular groove is arranged on the outer side wall of the inserting block, a first positioning groove and a second positioning groove which are arranged at intervals are arranged on the bottom surface of the groove of the annular groove, the size of an included angle between the first positioning groove and the second positioning groove is equal to the size of an included angle of a projectile Kong Kongzhou on the corresponding two adjacent frames, and the wall surface of the first positioning groove, which is close to the second positioning groove, is inclined towards the second positioning groove from inside to outside;

The explosion-proof cable pressing mechanism comprises a support which is assembled on the support in a sliding manner along the circumferential direction of the support, the support can be fixed on the support when moving to the inlet side opposite to the bullet hole, a supporting sleeve for the explosion-proof cable to pass through is connected to the support in a spiral transmission manner, a through hole for exposing the explosion-proof cable is formed in one side, facing the support, of the supporting sleeve, and the explosion-proof cable can be driven to be pressed on the perforating bullet when the supporting sleeve rotates.

By adopting the technical scheme, when assembling each frame body, the inserting blocks are firstly inserted into the inserting holes, the sliding blocks slide through the conical sections to be inserted into the annular grooves and then enter the first positioning grooves, so that each frame body is connected together, the preliminary assembly of each frame body is realized, the assembly efficiency is higher, each bullet shooting hole in each frame body faces the same direction, the perforating bullets are filled in each bullet shooting hole, the direction of the ammunition frame is not required to be adjusted during filling, and the filling efficiency is higher. The holder may be moved to the side of the projectile aperture prior to loading the charges, avoiding affecting the installation of the charges.

When the perforating charges on the ammunition frame are completely filled, the brackets are moved to be opposite to the perforating holes, the brackets are fixed at the positions, the detonating cord sequentially passes through the supporting sleeves, then the topmost frame body and the bottommost frame body relatively rotate, and in one side of any two adjacent frame bodies, which are close to each other, the sliding blocks slide into the second positioning grooves along the inclined groove wall surfaces in the first positioning grooves, so that the ammunition frame is adjusted to be in states that projectile holes on any two adjacent frame bodies face different directions.

The frame body rotates, can drag the detonating cord and twist reverse, and the detonating cord can drive the support sleeve and rotate, drives the detonating cord towards the frame body and removes when the support sleeve rotates, makes the detonating cord compress tightly on the perforating bullet, compares with the mode that fixes the detonating cord on the perforating bullet through the buckle among the prior art, and the detonating cord is fixed more firm, and support sleeve synchronous rotation when the detonating cord rotates, the detonating cord can not produce the buckling at the end of support sleeve.

Further, the connector comprises a connecting sleeve and a connecting ring sleeved outside the connecting sleeve, the inner cavity of the connecting sleeve forms the jack, a connecting groove penetrating up and down is formed in the inner wall of the connecting ring, a radially extending mounting through hole is formed in the connecting sleeve, the connecting groove is correspondingly located outside the mounting through hole, the sliding block is slidably inserted in the mounting through hole, and the elastic piece is connected between the sliding block and the bottom surface of the connecting groove.

By adopting the technical scheme, when the sliding block and the elastic piece are assembled, the elastic piece can be connected to the sliding block firstly, then the elastic piece and the sliding block are inserted into the installation through hole, and then the elastic piece is connected with the connecting ring through the connecting groove on the connecting ring, so that the sliding block can be assembled on the connecting body conveniently.

Further, the groove wall surface of the second positioning groove facing the first positioning groove is inclined from inside to outside to the first positioning groove, a third positioning groove is arranged on the insertion block, the third positioning groove is located on one side of the second positioning groove, which is opposite to the conical end of the insertion block, the third positioning groove and the second positioning groove are distributed at intervals along the axial direction of the frame body, the groove wall surface of the second positioning groove facing the third positioning groove is inclined from inside to outside to the third positioning groove, a guide groove for communicating the second positioning groove and the third positioning groove is further arranged between the second positioning groove and the third positioning groove, one side of the sliding block, which is close to the connecting ring, is connected with a pull rod, and one end of the pull rod, which is opposite to the sliding block, penetrates through the connecting ring to extend to the outer side of the connecting ring.

By adopting the technical scheme, the groove wall surface of the second positioning groove facing the first positioning groove is inclined from inside to outside to the first positioning groove, so that the sliding block can be reversed from the second positioning groove to enter the first positioning groove, the frame body can be restored to the state that the projectile holes on each frame body face the same direction when the frame body is reversely rotated, and the ammunition frame can be conveniently and repeatedly used to adjust the ammunition frame to the state that each projectile hole faces the same direction again, so that the perforating bullet can be conveniently and rapidly installed. Because the inclined plane for the sliding block to slide into the first positioning groove is arranged in the second positioning groove, in order to make the connection between the frame bodies more stable, a third positioning groove is added, after the sliding block is inserted into the second positioning groove, the uppermost frame body and the lowermost frame body are mutually close, the sliding block enters the third positioning groove through the guide groove, and the sliding block is prevented from being pushed by the inclined plane to cause relative rotation between the frame bodies. Through setting up the pull rod, outwards pulling pull rod can drive the slider and break away from the third constant head tank, makes the slider can get into the second constant head tank by the third constant head tank to can reverse each support body and make each support body reset.

Further, be equipped with the spiral shell on the support, support telescopic one side of being connected with the movable rod perpendicularly that is away from the support body, the radial extension of movable rod along the support body, movable rod and spiral shell screw drive cooperation are connected with the torsional spring between movable rod and the spiral shell, and the torsional spring makes support telescopic axis keep in the state parallel with the support body axis.

By adopting the technical scheme, the torsion spring enables the support sleeve to be kept in a state that the axis is parallel to the axis of the frame body, so that the detonating cord is convenient to wear and install in front of the rotating frame body.

Further, each of the upper end and the lower end of the frame body is provided with a supporting plate, the supporting plates are perpendicular to the axis of the frame body, one sides of the two supporting plates, which are close to each other, are provided with arc-shaped sliding grooves which correspond to each other and are coaxial with the frame body, the bottom surface of one end of each arc-shaped sliding groove is provided with a positioning hole, the positioning holes are opposite to the hole shafts of the bullet-shooting holes from top to bottom, the other ends of the arc-shaped sliding grooves extend to the sides of the bullet-shooting holes, two ends of the support are respectively connected with a sliding rod, the two sliding rods are respectively inserted into the positioning holes in the two supporting plates, and the support has elasticity, so that the two sliding rods can be close to each other when being extruded, and can be separated from the positioning holes and inserted into the arc-shaped sliding grooves.

By adopting the technical scheme, the support has elasticity, and when two slide bars are located the arc spout, the slide bar can jack up tightly on the bottom surface of the groove of arc spout for the support only can slide along the arc spout when being forced promotion, and the support produces and rocks before avoiding the slide bar card to go into the locating hole on the support body. The support slides to the alignment with the projectile hole, and two slide bars slide respectively to the locating hole in, make the support can fix between two locating holes. When the perforator needs to be reused again after being used once, the two sliding rods can be separated from the positioning holes by pushing the two sliding rods to be close to each other and clamped into the arc-shaped sliding grooves, so that the position of the support can be adjusted again, and the installation of the perforator is not affected.

Further, a positioning chute is arranged on the outer side wall of the perforating bullet, the positioning chute extends along the axis direction of the perforating bullet, a positioning plate is arranged in the bullet shooting hole, when the perforating bullet is inserted into the bullet shooting hole, the positioning plate is correspondingly inserted into the positioning chute, an arc-shaped groove for the detonating cord to be attached is formed at the detonation end of the perforating bullet, and a set included angle is formed between the extending direction of the arc-shaped groove and the axis direction of the frame body when the perforating bullet is inserted into the bullet shooting hole.

By adopting the technical scheme, the positioning sliding groove extending along the axis direction of the perforating bullet is arranged on the perforating bullet, so that the perforating bullet cannot rotate after being loaded into the bullet hole, and the position of the perforating bullet is fixed more firmly. The detonation end of the bullet hole is provided with an arc-shaped groove, and the detonating cord is pressed into the arc-shaped groove by the supporting sleeve after rotating, so that the position of the detonating cord is fixed more firmly.

Further, the outer edge of the supporting plate protrudes out of the bracket.

By adopting the technical scheme, when the ammunition frame is arranged in the sleeve, the outer edge of the supporting plate is contacted with the inner wall of the outer sleeve, so that collision and friction between the frame body, the perforating bullet and other structures and the inner wall of the outer sleeve are avoided.

Further, an arc-shaped through hole for the detonating cord to pass through is formed in the supporting plate, and the arc-shaped through hole is coaxial with the frame body.

By adopting the technical scheme, the detonating cord is prevented from bending due to the fact that the edge of the supporting plate passes over the supporting plate when the detonating cord is penetrated.

Further, the edge of the supporting plate is provided with a straight edge.

By adopting the technical scheme, the ammunition frame can be prevented from rolling.

The perforating gun for the fracturing completion has the beneficial effects that the sliding blocks, the first positioning grooves and the second positioning grooves are arranged on the frame bodies, so that the frame bodies are easier to assemble, and the assembly efficiency is higher. Meanwhile, the detonating cord is supported by the support sleeve, when the frame body rotates to drag the detonating cord to twist, the detonating cord can synchronously rotate with the support sleeve, bending can not occur between the detonating cord and the end part of the support sleeve, the stability of the detonating cord is prevented from being influenced, the detonating cord can be pressed on the perforating bullet when the support sleeve rotates, and the detonating cord is fixed more firmly.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, embodiments of the invention are illustrated by way of example and not by way of limitation, and like reference numerals refer to similar or corresponding parts and in which:

FIG. 1 is a schematic illustration of a perforating gun for fracturing well completion according to the present invention;

FIG. 2 is a schematic diagram II of a perforating gun for fracturing well completion;

FIG. 3 is a schematic diagram III of a perforating gun for fracturing well completion according to the present invention;

FIG. 4 is a schematic illustration of a frame in a perforating gun for fracturing completion according to the present invention;

FIG. 5 is a schematic diagram II of a frame in a perforating gun for fracturing completion according to the present invention;

FIG. 6 is a schematic diagram III of a frame in a perforating gun for fracturing completion according to the present invention;

FIG. 7 is a schematic diagram of a frame in a perforating gun for fracturing completion according to the present invention;

FIG. 8 is a schematic diagram of the configuration of a charge in a perforating gun for fracturing a well completion provided by the present invention;

FIG. 9 is a cross-sectional view of a carrier in a perforating gun for fracturing a well completion provided by the present invention;

fig. 10 is a schematic structural view of a support sleeve in a perforating gun for fracturing completion provided by the invention.

Reference numerals illustrate:

1. Outer sleeve, 101, reduced thickness groove, 2, frame body, 201, projectile hole, 202, insertion opening, 203, ejection opening, 204, stop edge, 3, support plate, 301, arc through hole, 302, arc chute, 303, positioning hole, 4, perforating bullet, 401, positioning chute, 402, arc groove, 5, positioning plate, 6, connecting sleeve, 601, insertion hole, 602, mounting through hole, 7, connecting ring, 701, connecting groove, 8, insertion block, 801, cylindrical section, 802, conical section, 803, annular groove, 804, first positioning groove, 805, second positioning groove, 806, third positioning groove, 807, guiding groove, 9, bracket, 10, slide bar, 11, spiral sleeve, 12, support sleeve, 121, through hole, 13, slide block, 14, pull rod, 15, elastic element, 16, detonating cord, 17, moving rod.

Detailed Description

The following description of the embodiments of the present invention will be made more complete and clear to those skilled in the art by reference to the figures of the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The following is an example of a perforator for a fracturing completion provided by the present invention:

as shown in fig. 1, 2 and 3, a perforator for fracture completion comprises an outer sleeve 1, a cartridge holder, a perforating bullet 4 and a detonating cord 16.

As shown in fig. 1, the outer sleeve 1 has a cylindrical sleeve structure, and the outer side wall of the outer sleeve 1 is provided with thickness reducing grooves 101 arranged at intervals in a spiral manner.

As shown in fig. 2, the ammunition frame comprises a frame body 2, a supporting plate 3 and a detonating cord compression mechanism.

The frame body 2 is provided with a plurality of, and a plurality of frame bodies 2 are arranged from top to bottom in turn. As shown in fig. 4 and 5, the frame body 2 has a cylindrical sleeve structure, and the top and bottom ends of the frame body 2 are both closed. The frame body 2 is provided with a projectile hole 201, and the hole axis of the projectile hole 201 is perpendicular to the axis of the frame body 2. The projectile hole 201 penetrates the frame body 2, and the projectile hole 201 forms an insertion opening 202 and an ejection opening 203 on the side wall of the frame body 2, the insertion opening 202 is used for inserting the perforating bullet 4, and the ejection opening 203 is used for ejecting the perforating bullet 4 after being detonated. The ejection port 203 has a stop edge 204 for stopping the charges 4 so that the charges 4 will not pass out of the ejection port 203 after being inserted into the incident bullet hole 201. The inner side wall of the frame body 2 is provided with a locating plate 5, and the locating plate 5 is horizontally arranged.

As shown in fig. 5 and 6, the top of the frame 2 is provided with a connector, and the bottom is provided with an insert 8.

As shown in fig. 4, 5 and 6, the connection piece comprises a connection sleeve 6 and a connection ring 7.

The connecting sleeve 6 and the frame body 2 are coaxially connected on the top surface of the frame body 2, and the inner cavity of the connecting sleeve 6 forms an inserting hole 601. The connecting sleeve 6 is provided with two mounting through holes 602 extending along the radial direction of the connecting sleeve 6, the two mounting through holes 602 are oppositely arranged, and the extending direction of the mounting through holes 602 is perpendicular to the hole axis direction of the projectile hole 201.

The inner wall of the connecting ring 7 is provided with two connecting grooves 701 penetrating up and down, and the two connecting grooves 701 are oppositely arranged. The connecting ring 7 is sleeved on the outer side of the connecting sleeve 6, and the connecting groove 701 is correspondingly positioned on the outer side of the mounting through hole 602.

As shown in fig. 7 and 9, a slider 13 is inserted in the installation through hole 602 in a sliding manner, an elastic member 15 is connected between the slider 13 and the bottom surface of the connecting groove 701, the elastic member 15 is a tension spring, and one end of the slider 13 facing away from the connecting ring 7 extends into the insertion hole 601. A pull rod 14 is arranged on the connecting ring 7 in a sliding way at a position corresponding to the connecting groove 701, and the pull rod 14 penetrates through the connecting ring 7, stretches into the mounting through hole 602 and is connected with the sliding block 13.

As shown in fig. 5 and 6, the insert block 8 includes a cylindrical section 801 and a tapered section 802 which are connected in this order from top to bottom.

The cylindrical section 801 is coaxial with the frame body 2, and an annular groove 803 which is arranged around the cylindrical section 801 is arranged on one side, close to the conical section 802, of the cylindrical section 801. The bottom surface of the annular groove 803 is provided with two first positioning grooves 804 which are oppositely arranged, and the central connecting line of the two first positioning grooves 804 is perpendicular to the hole axis of the projectile hole 201. The bottom surface of the annular groove 803 is also provided with two second positioning grooves 805 which are oppositely arranged, and the central connecting line of the two second positioning grooves 805 is perpendicular to the central connecting line of the two first positioning grooves 804, so that an included angle of 90 degrees is formed between the first positioning grooves 804 and the second positioning grooves 805.

In a top view, a groove wall surface of the first positioning groove 804, which is close to the second positioning groove 805 positioned at the rear side of the first positioning groove 804 in the clockwise direction, is inclined from inside to outside towards the second positioning groove 805, the inclined surface is called a first pushing inclined surface, and a groove wall surface of the second positioning groove 805, which is close to the first positioning groove 804 positioned at the rear side of the second positioning groove 805 in the anticlockwise direction, is inclined from inside to outside towards the first positioning groove 804, and the inclined surface is called a second pushing inclined surface.

As shown in fig. 6, two third positioning grooves 806 are disposed on the cylindrical section 801, the two third positioning grooves 806 are respectively located right above the two second positioning grooves 805, and a space is disposed between the third positioning grooves 806 and the corresponding second positioning grooves 805. The groove wall surface of the second positioning groove 805 facing the corresponding third positioning groove 806 is inclined from inside to outside to face the corresponding third positioning groove 806, the inclined surface is called a third pushing inclined surface, and a guide groove 807 for communicating the second positioning groove 805 with the third positioning groove 806 is further arranged between the second positioning groove 805 and the third positioning groove 806.

The top of the frame body 2 at the uppermost part is not provided with a connecting piece so that the frame body 2 at the uppermost part is connected with structures such as a connector, and the bottom of the frame body 2 at the lowermost part is not provided with an inserting block 8 so that the frame body 2 at the lowermost part is connected with structures such as a detonating device, a guiding positioning device, and the like. The connection between the upper and lower ends of the ammunition frame and the structures such as the connector, the detonating device, the guiding and positioning device is the prior art, and is not described in detail here.

When assembling the frame bodies 2, the inserting ports 202 of the projectile holes 201 in the upper frame body 2 and the lower frame body 2 are kept in the same orientation, the inserting block 8 is inserted into the inserting hole 601, the two sliding blocks 13 are pushed into the annular groove 803 by the conical section 802 and then are inserted into the first positioning groove 804, thus the preliminary connection between the frame bodies 2 is completed, the inserting ports 202 of the projectile holes 201 on the frame bodies 2 are oriented in the same orientation, and at the moment, the perforating charge 4 is filled, and the filling efficiency is higher. After the perforating charges 4 are filled, the uppermost frame body 2 and the lowermost frame body 2 can be rotated towards opposite directions, so that all sliding blocks 13 slide into the second positioning groove 805 through the pushing of the first pushing inclined plane, perforations on any two adjacent frame bodies 2 face different directions at the moment, then the uppermost frame body 2 and the lowermost frame body 2 are mutually close to each other, the sliding blocks 13 slide into the third positioning groove 806 along the third pushing inclined plane, and as no inclined plane is arranged in the third positioning groove 806, the sliding blocks 13 are not easy to slide from the third positioning groove 806, and at the moment, relative rotation is not easy to occur between the frame bodies 2, and the corresponding fixing between the frame bodies 2 is convenient for subsequent use.

As shown in fig. 4 and 5, the support plates 3 are provided with a plurality of support plates 3, and two support plates 3 which are vertically symmetrically arranged are respectively arranged at the upper end and the lower end of each frame body 2, and the support plates 3 are perpendicular to the axis of the frame body 2. One side of the two support plates 3 on the frame body 2, which is close to each other, is provided with an arc-shaped chute 302 which corresponds to each other and is coaxial with the frame body 2, the bottom surface of one end of the arc-shaped chute 302 is provided with a positioning hole 303, the positioning hole 303 is opposite to the hole axis of the bullet shooting hole 201 up and down and is positioned at one side of the insertion hole 202 of the bullet shooting hole 201, and the other end of the arc-shaped chute 302 extends to the side of the bullet shooting hole 201.

The supporting plate 3 is also provided with an arc-shaped through hole 301 for the detonating cord 16 to pass through, and the arc-shaped through hole 301 is coaxial with the frame body 2. Three straight edges are arranged at the edge of the support plate 3, so that the frame body 2 can be prevented from rolling when being placed on a plane structure.

As shown in fig. 7, the detonating cord compression mechanism includes a bracket 9, a slide bar 10 and a support sleeve 12.

As shown in fig. 7, the bracket 9 includes a vertical plate section and two horizontal plate sections connected to the upper and lower ends of the vertical plate section, the horizontal plate sections and the vertical plate section are integrally formed, the vertical plate section and the horizontal plate section are both metal thin plates, and the bending part has elasticity. An interval is arranged between the vertical plate section and the outer side wall of the frame body 2, the middle part of the vertical plate section is connected with a spiral sleeve 11, and the spiral sleeve 11 is positioned on one side of the vertical plate section, which is close to the frame body 2.

The two slide bars 10 are arranged, the two slide bars 10 are respectively and vertically connected to the two horizontal plate sections, the two slide bars 10 are respectively inserted into arc-shaped slide grooves 302 in two support plates 3 on the frame body 2, after the perforating charges 4 are filled into the bullet-shooting holes 201, the slide bars 10 can slide into positioning holes 303 at the end parts of the arc-shaped slide grooves 302 along the arc-shaped slide grooves 302, so that the support 9 is fixed on the frame body 2, and the spiral sleeve 11 on the support 9 is aligned with the bullet-shooting holes 201.

The support sleeve 12 is located in the interval between the vertical plate section and the frame body 2 and is used for allowing the detonating cord 16 to pass through, as shown in fig. 10, a through hole 121 for exposing the detonating cord 16 is formed in one side of the support sleeve 12 facing the frame body 2, the hole length of the through hole 121 is larger than the outer diameter of the detonation end face of the perforating bullet 4, a movable rod 17 is vertically connected to one side of the support sleeve 12 facing away from the frame body 2 and extends along the radial direction of the frame body 2, the movable rod 17 is inserted into the spiral sleeve 11 and is in spiral transmission fit with the spiral sleeve 11, a torsion spring is connected between the movable rod 17 and the spiral sleeve 11, and when the support sleeve 12 is not subjected to external force, the axis of the torsion spring is kept in a state parallel to the axis of the frame body 2.

As shown in fig. 8, a positioning chute 401 extending along the axial direction of the perforating bullet 4 is provided on the outer side wall of the perforating bullet 4, and when the perforating bullet 4 is inserted into the projectile hole 201, the positioning plate 5 in the frame 2 is inserted into the positioning chute 401. The detonation end of the perforating bullet 4 is also provided with an arc-shaped groove 402, and an acute included angle is formed between the extending direction of the arc-shaped groove 402 and the axis of the frame body 2.

As shown in fig. 3, one end of the detonating cord 16 is connected with the detonator, and the other end sequentially passes through the arc-shaped through holes 301 on each supporting plate 3 and the supporting sleeve 12 on the frame body 2, the detonating cord 16 is dragged to twist when rotating relatively between each frame body 2, the supporting sleeve 12 is driven to rotate when the detonating cord 16 rotates, and the supporting sleeve 12 moves towards the perforating bullet 4 on the frame body 2 while rotating, so that the detonating cord 16 can be pressed in the arc-shaped groove 402 in the perforating bullet 4.

When the invention is used, the sliding blocks 13 in one frame body 2 of two adjacent frame bodies 2 are inserted into the first positioning grooves 804 in the other frame body 2, the preliminary assembly is completed, at the moment, one sides of the inserting ports 202 of the projectile holes 201 in each frame body 2 face the same direction, the perforating bullets 4 are filled into the projectile holes 201, and when the perforating bullets 4 are inserted, the positioning plates 5 are ensured to be inserted into the positioning sliding grooves 401, so that the perforating bullets 4 cannot rotate after being filled into the projectile holes 201.

Then, each bracket 9 is pushed to slide along the arc chute 302 towards the positioning hole 303, so that the slide bar 10 is inserted into the positioning hole 303, the bracket 9 is fixed at the outer side of the insertion hole 202 of the corresponding projectile hole 201, the state of the whole ammunition frame is shown in fig. 2, the detonating cord 16 passes through each arc through hole 301 and each supporting sleeve 12, the topmost frame body 2 and the bottommost frame body 2 are held again, the two frame bodies 2 are reversely rotated, each upper frame body 2 rotates anticlockwise relative to the lower frame body 2 in a top view state, the slide block 13 slides into the second positioning groove 805 from the first pushing inclined plane, at this time, the perforating bullets 4 on any two adjacent frame bodies 2 face different directions, and the shooting angle between every two adjacent perforating bullets 4 is 90 degrees.

In the process of relative rotation between the frame bodies 2, the detonating cord 16 is driven by the frame bodies 2 to twist, the supporting sleeve 12 is driven to rotate while the detonating cord 16 twists, the supporting sleeve 12 moves towards the perforating bullet 4 while rotating, and after the supporting sleeve 12 rotates for a set angle, the detonating cord 16 is pressed in the arc-shaped groove 402 on the perforating bullet 4. And then pushing the uppermost frame body 2 and the lowermost frame body 2 to approach each other, so that the sliding blocks 13 slide into the third positioning grooves 806 along the third pushing inclined planes and the guide grooves 807, and final clamping and fixing among the frame bodies 2 are realized.

After the perforating gun performs a perforating operation, the sliding block 13 can be withdrawn from the third positioning groove 806 by pulling the pull rod 14 outwards, then pulling the two adjacent frame bodies 2 away from each other, sliding the sliding block 13 into the second positioning groove 805, then rotating the uppermost frame body 2 and the lowermost frame body 2 relatively along the direction opposite to the rotating direction during installation, sliding the sliding block 13 into the first positioning groove 804 along the second pushing inclined plane, and then moving the support 9 to the side of the projectile hole 201, at this time, a new perforating charge 4 can be reinstalled to reuse the perforating gun.

The frame bodies 2 in the perforator for the fracturing completion provided by the invention are more convenient and faster to assemble, the assembly efficiency is higher, the supporting sleeve 12 rotates synchronously along with the detonating cord 16, the detonating cord 16 cannot bend at the end part of the supporting sleeve 12, the conductivity and stability of the detonating cord 16 cannot be influenced by bending, the detonating cord 16 can be pressed on the perforating bullet 4 when the supporting sleeve 12 rotates, and the detonating cord 16 and the perforating bullet 4 are more firmly connected.

In this embodiment, the pull rod 14 is connected to the slider 13, and the slider 13 may be pulled out from the third positioning slot 806 by pulling the pull rod 14, so as to readjust the relative position of each frame 2, in other embodiments, the slider 13 does not have the pull rod 14, and at this time, the slider 13 is inserted into the third positioning slot 806 and cannot be separated from the third positioning slot, so that the relative position of each frame 2 cannot be readjusted.

In this embodiment, the first positioning groove 804 and the second positioning groove 805 form an angle of 90 degrees, the axes of the projectile holes 201 in two adjacent frames 2 form an angle of 90 degrees, and in other embodiments, the first positioning groove 804 and the second positioning groove 805 form an angle of 60 degrees, and the axes of the projectile holes 201 in two adjacent frames 2 form an angle of 60 degrees.

Claims (9)

1. The perforator for the fracturing well completion comprises an outer sleeve, detonating cords and a cartridge frame, wherein the cartridge frame comprises a plurality of frame bodies which are coaxially and sequentially connected from top to bottom, bullet shooting holes are formed in the frame bodies, a set included angle is formed between hole shafts of the bullet shooting holes on any two adjacent frame bodies, the bullet shooting holes are internally provided with perforating bullets, the detonating cords are used for being matched with the perforating bullets arranged in the cartridge frame, and the outer sleeve is sleeved on the outer side of the cartridge frame;

The device is characterized in that one end of any two adjacent frame bodies, which are close to each other, is respectively provided with a connecting body and an inserting block, the connecting body is provided with an inserting hole, the inserting block and the inserting hole can be matched and inserted, the connecting body is provided with a sliding block capable of sliding along the radial direction, one end of the sliding block is connected with the connecting body, and the other end of the sliding block extends into the inserting hole;

The explosion-proof cable pressing mechanism comprises a support which is assembled on the support in a sliding manner along the circumferential direction of the support, the support can be fixed on the support when moving to the inlet side opposite to the bullet hole, a supporting sleeve for the explosion-proof cable to pass through is connected to the support in a spiral transmission manner, a through hole for exposing the explosion-proof cable is formed in one side, facing the support, of the supporting sleeve, and the explosion-proof cable can be driven to be pressed on the perforating bullet when the supporting sleeve rotates.

2. The perforator for fracture completion according to claim 1, wherein the connector comprises a connecting sleeve and a connecting ring sleeved outside the connecting sleeve, the inner cavity of the connecting sleeve forms the jack, connecting grooves penetrating up and down are formed in the inner wall of the connecting ring, radially extending mounting through holes are formed in the connecting sleeve, the connecting grooves are correspondingly located on the outer sides of the mounting through holes, the sliding blocks are slidably inserted into the mounting through holes, and the elastic piece is connected between the sliding blocks and the bottom surfaces of the connecting grooves.

3. The perforator for fracture completion according to claim 2, wherein the groove wall surface of the second positioning groove facing the first positioning groove is inclined from inside to outside towards the first positioning groove, a third positioning groove is formed in the insertion block and is located on one side, facing away from the conical end portion of the insertion block, of the second positioning groove, the third positioning groove and the second positioning groove are distributed at intervals along the axial direction of the frame body, the groove wall surface of the second positioning groove facing the third positioning groove is inclined from inside to outside towards the third positioning groove, a guide groove for communicating the second positioning groove and the third positioning groove is further arranged between the second positioning groove and the third positioning groove, one side, facing away from the connecting ring, of the sliding block is connected with a pull rod, and one end, facing away from the sliding block, of the pull rod penetrates through the connecting ring to extend to the outer side of the connecting ring.

4. A perforator for a fracturing completion according to any one of claims 1-3, wherein a spiral sleeve is arranged on the support, a movable rod is vertically connected to one side of the support sleeve, which is opposite to the frame body, the movable rod extends along the radial direction of the frame body, the movable rod is in spiral transmission fit with the spiral sleeve, a torsion spring is connected between the movable rod and the spiral sleeve, and the torsion spring enables the axis of the support sleeve to be kept parallel to the axis of the frame body.

5. A perforator for fracture completion according to any one of claims 1-3, wherein each of the upper and lower ends of the frame is provided with a supporting plate, the supporting plates are perpendicular to the axis of the frame, one side of each of the two supporting plates, which is close to each other, is provided with an arc chute which corresponds to each other and is coaxial with the frame, the bottom surface of one end of each arc chute is provided with a positioning hole, the positioning holes are opposite to the hole axis of the projectile hole up and down, the other end of each arc chute extends to the side of the projectile hole, each of the two ends of the support is connected with a sliding rod, the two sliding rods are respectively inserted into the positioning holes of the two supporting plates, and the support has elasticity, so that the two sliding rods can be close to each other when being extruded, and can be separated from the positioning holes and inserted into the arc chute.

6. The perforating tool for fracturing well completion according to claim 5, wherein a positioning chute is arranged on the outer side wall of the perforating bullet, the positioning chute extends along the axis direction of the perforating bullet, a positioning plate is arranged in the perforating bullet hole, when the perforating bullet is inserted into the perforating bullet hole, the positioning plate is correspondingly inserted into the positioning chute, an arc-shaped groove for the detonating cord to be attached is arranged at the detonation end of the perforating bullet, and a set included angle is formed between the extending direction of the arc-shaped groove and the axis direction of the frame body when the perforating bullet is inserted into the perforating bullet hole.

7. The perforating gun for fracturing completion of claim 5, wherein an outer edge of the support plate protrudes from the carrier.

8. The perforating gun for fracturing well completion of claim 5, wherein the supporting plate is provided with an arc-shaped through hole for the detonating cord to pass through, and the arc-shaped through hole is coaxial with the frame body.

9. The perforating gun for fracturing completion of claim 5, wherein straight edges are provided at edges of the support plates.