CN214836284U

CN214836284U - Oversleeve type composite fixed-position fixed-firing-angle perforating device

Info

Publication number: CN214836284U
Application number: CN202023311972.2U
Authority: CN
Inventors: 禹栽星; 张国杰; 宋波; 张楠楠; 陈德祥; 徐文超
Original assignee: Daqing Jinxiangyu Technology Co ltd
Current assignee: Daqing Jinxiangyu Technology Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-11-23
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to a sleevelet type composite orientation and fixed firing angle perforating device, which comprises a perforating gun body, a fixed firing angle bullet frame, a first middle joint and a second middle joint, wherein the two ends of the perforating gun body are respectively connected with the first middle joint and the second middle joint; the outside cover of perforation rifle body be equipped with the oversleeve cartridge case, oversleeve cartridge case both ends are fixed through intermediate head one and intermediate head two. The utility model discloses there is the oversleeve cartridge case at the outside cover of perforating gun body, and the medicine cake formula gunpowder that can more conventional compound perforation improves nearly 10 times the charge, has broken away from the restriction in perforating gun body space, can implement fixed position fixed firing angle perforation and fracturing technology simultaneously.

Description

Oversleeve type composite fixed-position fixed-firing-angle perforating device

Technical Field

The utility model belongs to the field of oilfield machinery, a compound fixed position fixed angle perforation device of oversleeve formula is related to.

Background

In recent years, with the deep development of oil field development, the exploitation difficulty is increasing, and the requirement on the perforation process is higher and higher. In order to pursue better development effect and greater economic benefit, the composite perforation technology is widely applied at home and abroad. The composite perforation technology is an efficient perforation technology integrating perforation and high-energy gas fracturing, can complete two procedures of perforation and high-energy gas fracturing at one time, performs high-energy gas fracturing on a near-well stratum while perforating, improves the diversion capability of the near-well stratum and improves the perforation completion effect.

At present, in most of the commonly used composite perforation in China, a solid propellant and a perforating bullet are arranged in a bullet frame and then arranged in a perforating gun body, the perforating bullet is detonated by a detonating cord, the perforating bullet detonates to form jet flow, and simultaneously, a fracturing medicament in the perforating gun is ignited to generate a large amount of gas which acts on a near wellbore zone through perforation holes, so that a plurality of cracks are generated in the near wellbore zone, and the flow conductivity of the near wellbore zone is improved. Most of the oil and gas fields in China are land phase sedimentary, the reservoir is thin, lithologic, contains more cementing substances and has more interlayers, and many oil and gas layers belong to low porosity, low permeability and low oil and gas production layers. The perforating device can make up the defects of conventional perforating by orienting and setting the perforating angle aiming at the oil-gas layer, so that the perforating bullet perforates along the main stress direction of the stratum, and the jet flow is parallel to the reservoir layer or perforates towards a designated plane through the setting angle, thereby having obvious effect on increasing the production of oil-gas wells. Although the oriented perforation with the fixed angle has obvious yield increase compared with the conventional perforation, for the oil and gas layers with low porosity and low permeability, the goal of long-term stable yield increase is difficult to realize by the single oriented perforation technology, however, if the composite gas fracturing perforation technology and the fixed-azimuth perforation technology can be combined, a perforation device is developed, can meet the requirements of positioning and perforating, can also perform high-energy gas fracturing on the near-well stratum, improve the flow conductivity of the near-well stratum, thereby better improving the perforation completion effect, but the orientation perforating device is limited by the space of the charge frame and the perforating gun body, the composite perforation is difficult to realize, therefore, the development of the perforating device which can position the azimuth and the perforation angle and can realize high-energy gas fracturing is of great significance for the development of the low-porosity, low-permeability and low-oil-gas-production layers.

Disclosure of Invention

The utility model aims at providing a compound fixed position fixed angle perforating device of oversleeve formula overcomes present fixed position fixed angle perforating device and receives the restriction in bullet frame and perforation rifle body space, is difficult to realize the problem of compound perforation.

The utility model discloses a following technical scheme realizes: a sleevelet type composite fixed-orientation fixed-firing-angle perforating device comprises a perforating gun body, a fixed-firing-angle bullet rack, a first middle joint and a second middle joint, wherein two ends of the perforating gun body are respectively connected with the first middle joint and the second middle joint; the outside cover of perforation rifle body be equipped with the oversleeve cartridge case, oversleeve cartridge case both ends are fixed through intermediate head one and intermediate head two.

Furthermore, the fixed firing angle bullet frame and the perforating gun body can rotate relatively, a centering bearing and a deflection block are welded in the middle of the fixed firing angle bullet frame, one end of the fixed firing angle bullet frame is connected with an upper centering body through a bearing I, the other end of the fixed firing angle bullet frame is connected with a lower centering body through a bearing II, and the upper centering body and the lower centering body respectively enter a cavity between the middle joint I and the middle joint II.

Furthermore, the detonating cord is spirally wound on the fixed firing angle bullet rack and respectively extends out of the upper centralizing body and the lower centralizing body.

Adopt above-mentioned technical scheme's positive effect: the utility model discloses there is the oversleeve cartridge case at the outside cover of perforating gun body, and the medicine cake formula gunpowder that can more conventional compound perforation improves nearly 10 times's charge, has broken away from the restriction in perforating gun body space, improves high energy gas to stratum fracturing, deepens the perforation and wears the construction effect of depth and improvement perforation compaction area. When the perforating bullet is detonated, metal jet flow generated by the perforating bullet penetrates through a gun barrel, an oversleeve cartridge and a sleeve into a ground layer at microsecond speed to form a pore channel, multiple clusters of high-temperature metal hot particles ignite the oversleeve cartridge while penetrating through the oversleeve cartridge, and are combusted at millisecond speed to generate a large amount of high-temperature high-pressure gas to impact a perforation hole compaction zone, so that a strong scouring effect is generated on the pore channel, the perforation depth is increased, and multiple radial cracks are generated in a near-well area, so that the permeability of the ground layer in the near-well area is improved, the fracture pressure of stratum rocks is reduced, the oil seepage area is increased, and the production and injection capacity of an oil well is improved; meanwhile, as the fixed firing angle bullet rack and the perforating gun body can rotate relatively, each gun and the fixed firing angle bullet rack form a unit, at the moment, the perforating bullet can force the perforating bullet to perforate towards a preset direction under the action of the deflection weight, and thus the fixed-direction fixed firing angle perforation is realized.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure, a first joint, a second upper centralizing body, a third perforating gun body, a fourth bearing, a fifth bearing, a sixth perforating bullet, a fourth sleeve cartridge, a fifth detonating cord, a sixth perforating bullet rack, a fifth perforating bullet rack, a sixth perforating bullet rack, a fifth perforating bullet rack, a sixth perforating bullet rack, a fifth perforating bullet rack, a fourth perforating bullet rack, a fifth perforating bullet rack, a fourth perforating bullet rack, a third perforating gun, a fourth perforating bullet rack, a fourth perforating bullet, a fourth perforating gun, a fourth perforating bullet, a fourth perforating gun, a fourth.

Detailed Description

The technical solution of the present invention is further described below with reference to the accompanying drawings, but should not be construed as limiting the present invention.

Fig. 1 is the utility model discloses a structural schematic diagram, as shown in the figure, a compound fixed position fixed firing angle perforating device of oversleeve formula, including the perforating gun body 3, fixed firing angle bullet frame 8, intermediate head 1, intermediate head two 13, the perforating gun body 3 both ends connect intermediate head 1 and intermediate head two 13 respectively, be equipped with fixed firing angle bullet frame 8 in the perforating gun body 3, be equipped with perforating bullet 5 on the fixed firing angle bullet frame 8, every perforating bullet 5 is through detonating cord 7 UNICOM. The outside of the perforating gun body 3 is sleeved with a sleeve cartridge 6, and two ends of the sleeve cartridge 6 are fixed through a middle joint I1 and a middle joint II 13. The sleeve cartridge is arranged on the periphery of the perforating gun body, so that the limitation of the internal space of the perforating gun body is eliminated.

The perforating gun is characterized in that the fixed firing angle bullet rack 8 and the perforating gun body 3 can rotate relatively, a centering bearing 10 and a deflection weight 9 are welded in the middle of the fixed firing angle bullet rack 8, one end of the fixed firing angle bullet rack 8 is connected with the upper centering body 2 through a bearing I4, the other end of the fixed firing angle bullet rack is connected with the lower centering body 12 through a bearing II 11, and the upper centering body 2 and the lower centering body 12 respectively enter a cavity between a middle joint I1 and a middle joint II 13. Because the fixed firing angle bullet rack and the perforating gun body can rotate relatively, each gun and the fixed firing angle bullet rack form a unit, at the moment, the perforating bullet can force the perforating bullet to perforate towards a preset direction under the action of the deflection weight, and therefore the fixed-direction fixed firing angle perforation is realized.

Further, the detonating cord 7 is spirally wound on the constant-firing-angle carrier 8 and extends from the upper and lower centralizers 2 and 12, respectively.

Due to the adoption of the structure, when the device is lowered to a specified position in a well, the perforating bullet can restrict the rotation of the fixed firing angle bullet rack under the gravity action of the weight, so that the perforating bullet perforates towards a preset direction, and the fixed firing angle perforation is realized. In addition, when the perforating bullet is detonated, metal jet flow generated by the perforating bullet penetrates through the perforating gun body, the oversleeve cartridge and the sleeve at microsecond speed to enter a stratum to form a pore channel, and a plurality of clusters of high-temperature metal hot particles ignite the oversleeve cartridge while penetrating through the oversleeve cartridge to generate a large amount of high-temperature high-pressure gas and generate a fracturing effect.

The utility model discloses it has the oversleeve cartridge case to overlap at the perforating gun external portion, the space that gunpowder took has been reduced, the restriction in perforating gun body space has been got rid of, when the perforating bullet detonates, the metal jet that the perforating bullet produced pierces through the barrel with microsecond level speed, the oversleeve cartridge case, the sleeve pipe gets into the ground and forms the pore, when passing the oversleeve cartridge case, the oversleeve cartridge case is ignited to many cluster high temperature metal hot particles, burn with millisecond level speed, produce a large amount of high temperature high-pressure gas, strike perforation punchhole compaction area, produce stronger scouring action to the hole, increase the perforation depth, simultaneously under the effect that high energy gas fracfts, produce radial many radial cracks in the near-well region, thereby improve near-well area stratum permeability, reduce the fracture pressure of stratum rock, increase the oil permeability area, improve the production and injection ability of oil well; meanwhile, as the fixed firing angle bullet rack and the perforating gun body can rotate relatively, each gun and the fixed firing angle bullet rack form a unit, at the moment, the perforating bullet can force the perforating bullet to perforate towards a preset direction under the action of the deflection weight, and thus the fixed-direction fixed firing angle perforation is realized.

Claims

1. The utility model provides a compound fixed position fixed firing angle perforating device of oversleeve, includes the perforating gun body (3), fixes firing angle bullet frame (8), well first (1) of intermediate junction, intermediate junction two (13), perforating gun body (3) both ends connect respectively well first (1) of intermediate junction and well second (13) of intermediate junction, be equipped with in the perforating gun body (3) and decide firing angle bullet frame (8), be equipped with perforating bullet (5) on deciding firing angle bullet frame (8), every firing hole bullet (5) are through detonating cord (7) UNICOM, its characterized in that: the perforating gun is characterized in that a sleeve cartridge (6) is sleeved outside the perforating gun body (3), and two ends of the sleeve cartridge (6) are fixed through a middle joint I (1) and a middle joint II (13).

2. The cuffed composite oriented perforating device of claim 1, wherein: the perforating gun is characterized in that the fixed firing angle bullet rack (8) and the perforating gun body (3) can rotate relatively, a centering bearing (10) and a weight bias (9) are welded in the middle of the fixed firing angle bullet rack (8), one end of the fixed firing angle bullet rack (8) is connected with the upper centering body (2) through a bearing I (4), the other end of the fixed firing angle bullet rack is connected with the lower centering body (12) through a bearing II (11), and the upper centering body (2) and the lower centering body (12) respectively enter a cavity in the middle of a middle joint I (1) and a middle joint II (13).

3. The cuffed composite oriented perforating device of claim 2, wherein: the detonating cord (7) is spirally wound on the bullet rack (8) with a fixed firing angle and respectively extends out of the upper centralizing body (2) and the lower centralizing body (12).