CN111412791A - Large-pore-volume perforating bullet and production device and production method thereof - Google Patents
Large-pore-volume perforating bullet and production device and production method thereof Download PDFInfo
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- CN111412791A CN111412791A CN202010227269.9A CN202010227269A CN111412791A CN 111412791 A CN111412791 A CN 111412791A CN 202010227269 A CN202010227269 A CN 202010227269A CN 111412791 A CN111412791 A CN 111412791A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 239000002360 explosive Substances 0.000 claims abstract description 132
- 239000011148 porous material Substances 0.000 claims abstract description 55
- 238000003825 pressing Methods 0.000 claims description 41
- 239000000843 powder Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 16
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 15
- 230000000903 blocking effect Effects 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052797 bismuth Inorganic materials 0.000 claims description 8
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 8
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 238000005056 compaction Methods 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000004880 explosion Methods 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- 230000000977 initiatory effect Effects 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract 1
- 238000012546 transfer Methods 0.000 description 7
- 229910052721 tungsten Inorganic materials 0.000 description 7
- 239000010937 tungsten Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000035515 penetration Effects 0.000 description 5
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- 239000000243 solution Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000005474 detonation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000002245 particle Substances 0.000 description 2
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- 230000009471 action Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
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- 239000007858 starting material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/119—Details, e.g. for locating perforating place or direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
- F42B33/001—Devices or processes for assembling ammunition, cartridges or cartridge elements from parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
- F42B33/02—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges
- F42B33/025—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges by compacting
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to the technical field of initiating explosive devices, and particularly discloses a large-pore-volume perforating bullet and a production device and a production method thereof. The double-layer liner type explosive provided by the embodiment of the invention has the advantage of high perforation pore canal volume, and the double-layer liner type explosive is formed by adopting the primary liner type explosive and the secondary liner type explosive, so that the double-layer liner type explosive is pushed after explosion to form superposed metal jet flow to realize perforation and reaming, and the perforation depth and the perforation pore diameter can be considered at the same time; the provided production method is simple, the prepared large-pore-volume perforating bullet can greatly improve the volume of a perforation pore channel and increase the volume of an oil flow channel, so that the oil recovery rate is improved, and the problems that the existing perforating bullet cannot give consideration to both the perforation depth and the perforation pore diameter and has low volume of the perforation pore channel are solved.
Description
Technical Field
The invention relates to the technical field of initiating explosive devices, in particular to a large-pore-volume perforating bullet and a production device and a production method thereof.
Background
Perforating charges are of great importance in the field of resource exploitation as a initiating explosive device for penetrating casings, cement casings and earth formations during perforating. The oil-gas well needs perforation operation after well drilling and well cementing, usually a series of perforating bullets are sequentially loaded into a perforating gun according to different phases, explosive detonation is utilized to push a shaped charge cover to form high-speed jet flow, a gun barrel, a casing pipe and a well cementing cement ring are penetrated, a certain pore channel is formed on an oil layer, and therefore the casing pipe is effectively communicated with the oil storage layer to form an oil flow channel.
The oil flow channel formed after the perforating bullet acts directly influences the production of oil and gas wells, so that the perforating bullet is required to have good perforation depth and perforation aperture. However, the perforation depth and the perforation aperture of the existing perforating bullet are opposite indexes which influence each other, the perforation aperture of the perforating bullet with high perforation depth is small, the perforation depth of the perforating bullet with large perforation aperture is low, the advantages of the perforation depth and the perforation aperture can not be effectively compatible, the problem of low volume of a perforation pore channel exists, the volume of an oil flow channel formed after the action of the perforating bullet is small, and the oil extraction rate is not favorably improved.
Disclosure of Invention
The embodiment of the invention aims to provide a large-pore-volume perforating bullet to solve the problems that the existing perforating bullet proposed in the background technology cannot give consideration to both the perforation depth and the perforation pore diameter and has low perforation pore channel volume.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a large-pore-volume perforating bullet comprises a bullet shell, wherein an explosive and an explosion transfer powder positioned at one end of the explosive are arranged in the bullet shell, the explosive and the explosion transfer powder jointly form a pre-pressed powder column, a primary powder cover covers the inner side of the pre-pressed powder column, a secondary powder cover is arranged at one end, away from the explosion transfer powder, of the primary powder cover, the outer side wall of the secondary powder cover is attached to the inner side of the pre-pressed powder column and extends to be in contact with the inner side wall of the bullet shell, a powder cover fixing ring is arranged at an opening at one end, away from the explosion transfer powder, of the bullet shell and used for fixing the secondary powder cover on the bullet shell without falling off, and a circular opening is arranged at one end, facing the explosion transfer powder, of the secondary powder cover; wherein the angle formed by the two side edges of the first-stage liner is 38-42 degrees, and the angle formed by the two side edges of the second-stage liner is 105-115 degrees.
As a further scheme of the invention: the booster explosive and the explosive are placed in the cartridge case and pressed to form a pre-pressed explosive column; the primary shaped charge liner and the secondary shaped charge liner are arranged on the surface of the pre-pressed shaped charge column to form a superposed shaped charge liner; the fixed ring of shaped charge cover is arranged in the shell case with the junction of second grade shaped charge cover, and fix on the shell case, be used for with second grade shaped charge cover is fixed just do not drop on the shell case.
As a still further scheme of the invention: the first-level shaped charge liner is a variable wall thickness tungsten-based metal powder shaped charge liner, and comprises the following raw materials in parts by weight: 40-80 parts of tungsten powder, 10-30 parts of copper powder, 5-20 parts of bismuth powder and 5-10 parts of lead powder.
As a still further scheme of the invention: the wall thickness of the first-level shaped charge liner is 2mm-3 mm; the second-stage shaped charge liner is a red copper plate shaped charge liner with equal wall thickness, the height is 12mm-20mm, and the diameter of a circular opening on the second-stage shaped charge liner is 6mm-15 mm.
As a still further scheme of the invention: the preparation method of the first-level liner can refer to the prior art, and has the innovation point that the first-level liner and the second-level liner are combined, the structure is superposed by adopting the two-level liner, the included angle between the first-level liner and the second-level liner is necessary, explosive detonation waves sequentially work on the first-level liner and the second-level liner, the first-level liner forms a slender metal jet to complete perforation, the second-level liner forms a thicker metal jet to complete reaming and further perforation, so that a perforation channel which takes both perforation depth and perforation aperture into consideration is formed, and the pore volume of the perforation channel is increased by more than 15-20% compared with that of a conventional perforating bullet.
As a still further scheme of the invention: the material and the preparation method of the secondary shaped charge liner are the prior art, but the included angle formed by two side edges of the secondary shaped charge liner is ensured to be 105-115 degrees, and the secondary shaped charge liner is characterized in that the secondary shaped charge liner is combined with the primary shaped charge liner to form a composite shaped charge liner, the explosive forms a superposition effect after explosion, and part of the power source of the secondary shaped charge liner is metal jet flow formed by the primary shaped charge liner.
Another object of an embodiment of the present invention is to provide a production apparatus for producing the above large pore volume perforating charge, specifically a mobile pressing mold, including: the explosive cartridge case comprises a die main body and a punch, wherein the die main body is used for placing the cartridge case, the punch is used for pressing the explosive and the booster explosive to jointly form a pre-pressed explosive column, an opening at one end of the die main body is detachably provided with a righting sleeve which is used for allowing the punch to be inserted into the cartridge case and limiting deviation, and a base is arranged at one end, far away from the righting sleeve, of the die main body.
As a still further scheme of the invention: the centering sleeve is sleeved on an outer circle of the opening of the die main body, a hole for the punch to be inserted into the cartridge case is formed in the middle of the centering sleeve, the diameter of the hole is the same as that of the punch, two small vent holes are symmetrically formed in the side face of the centering sleeve, and the centering sleeve is used for exhausting air in a die cavity when the explosive and the booster explosive jointly form a pre-pressed explosive column.
As a still further scheme of the invention: the base includes fixed mounting and is in the mould main part is kept away from right the base main part of the one end of cover, base main part axle center department has seted up the step hole, the downthehole dismantled and assembled shutoff piece that is provided with of step, shutoff piece one end extends to in the mould main part, the shutoff piece other end is provided with the bolster, the bolster outside is provided with and is used for fixing the bolster and the pretensioning piece of shutoff piece.
As a still further scheme of the invention: the step hole is that the upper end is the macroporous structure of aperture, lower extreme, and the lower extreme macropore is provided with the internal thread, base main part periphery is provided with round semicircle type groove, and the hand of being convenient for is held and is held.
As a still further scheme of the invention: the buffer member may be a rubber pad in the prior art, and certainly, a pad with a buffering effect made of other elastic materials may also be used, which is not limited herein, and the specific shape may be a circle, a circular ring, or the like.
As a still further scheme of the invention: the plugging piece can be a plugging core in the prior art, and is specifically shaped as a semicircular cylinder at the bottom and a semicircular boss at the upper end; the plugging piece passes through and pastes in the bottom in the step hole that base main part axle center department seted up, the bolster is arranged in the plugging piece bottom, the pretensioning piece passes through the threaded connection mode (the lower extreme macropore in step hole is provided with the internal thread) and connects in the step hole, fixes bolster and plugging piece in the base main part, the plugging piece contracts after bearing the pressure and plays the cushioning effect.
As a still further scheme of the invention: the main body of the die is a cylinder, the internal structure of the main body is basically consistent with the external structure of the cartridge case, and the cartridge case filled with booster explosive and explosive is directly filled into the main body of the die during pressing.
As a still further scheme of the invention: the structure of the punch is specifically designed according to the structures of the primary liner and the secondary liner, and the punch penetrates through the centering sleeve to complete pressing and assembly of the primary liner.
Another object of the embodiment of the present invention is to provide a method for producing the large pore volume perforating bullet, where the method for producing the large pore volume perforating bullet adopts the above production apparatus, and specifically includes the following steps:
1) pouring the booster explosive into the inner cavity of the cartridge case, then pouring the explosive into the inner cavity of the cartridge case and covering the booster explosive, and placing the booster explosive and the explosive together in the die main body to finish charging;
2) sleeving a centering sleeve on a die main body, enabling the centering sleeve to be tightly attached to a cartridge case, putting a punch into the cartridge case, then, dropping the punch to be attached to an explosive, pressing the explosive and the booster explosive to form a pre-pressed explosive column, pulling out the punch, removing the centering sleeve, and finishing pressing;
3) and (3) pressing the primary liner in the prefabricated explosive column by adopting a punch, assembling the secondary liner in the cartridge case and contacting the prefabricated explosive column, and then placing the liner fixing ring at the opening of the cartridge case and fixing the liner fixing ring on the cartridge case to obtain the large-pore-volume perforating bullet.
As a still further scheme of the invention: the production method of the large-pore-volume perforating bullet specifically comprises the following steps:
1) charging: weighing 1g-5g of booster explosive and pouring the booster explosive into the inner cavity of the cartridge case 1, weighing 38g-42g of explosive and pouring the explosive into the inner cavity of the cartridge case 1 and covering the booster explosive, and placing the cartridge case filled with the booster explosive and the explosive into the die main body, wherein the explosive and the booster explosive are loose explosive;
2) die assembly and pressing: sleeving a centering sleeve on a die main body, enabling the centering sleeve to be tightly attached to a cartridge case to prevent the explosive from extruding out, placing a punch into the cartridge case and then dropping by the dead weight, and tightly attaching the punch and the explosive to complete die assembly; then putting the production device filled with the cartridge case, the booster explosive and the explosive into an explosion-proof hydraulic system, pressing for 1-3 times by using 300KN-500KN pressure, maintaining the pressure for 2-6 s (air existing between a die cavity and an explosive particle gap in the cartridge case is discharged from an air hole on a centering sleeve during pressing), taking out the production device after pressing, pulling out a punch, removing the centering sleeve, and forming a pre-pressed explosive column by the loosely loaded booster explosive and the explosive and attaching the pre-pressed explosive column to the inner cavity of the cartridge case;
3) a charge type cover: pressing the primary liner in the prefabricated explosive column by using a punch, manually assembling the secondary liner in the cartridge case and contacting the preformed explosive column, and tightly combining the secondary liner with the preformed explosive column and the inner cavity of the cartridge case; the method comprises the following steps of putting a first-stage liner into a prefabricated explosive column, loading 10-30 KN of pressure after a punch is put into the prefabricated explosive column for compressing, manually assembling a second-stage liner in a cartridge case and contacting the prefabricated explosive column, wherein the second-stage liner is tightly combined with the prefabricated explosive column and an inner cavity of the cartridge case, and the second-stage liner is tightly attached to the first-stage liner, namely the outer side wall of the second-stage liner is attached to the inner side of the prepressing explosive column and extends to be contacted with the inner side wall of the cartridge case;
4) powder-charging type cover fixing ring: placing the liner fixing ring at the opening of the cartridge case, and fixing the liner fixing ring on the cartridge case in a bonding or riveting manner so as to fix the secondary liner on the cartridge case without falling off, thereby obtaining the large-pore-volume perforating bullet; of course, other fixing manners, such as screwing, welding, etc., may be also possible, which are selected according to the requirements and are not limited herein.
As a still further scheme of the invention: in the production method of the large-pore-volume perforating bullet, the included angle formed by the two side edges of the first-stage shaped charge cover is 38-42 degrees, the included angle formed by the two side edges of the second-stage shaped charge cover is 105-115 degrees, a movable explosive pressing die is formed by adopting a punch, a pre-pressed explosive column is obtained by compression molding in a bullet shell, and then the assembly of the shaped charge covers (the first-stage shaped charge cover and the second-stage shaped charge cover) is completed.
The embodiment of the invention also aims to provide the large-pore-volume perforating charge prepared by the production method of the large-pore-volume perforating charge.
As a still further scheme of the invention: the production method of the large-pore-volume perforating bullet is applied to the production of initiating explosive devices, wherein the initiating explosive devices comprise a fire cap, a primer, an ignition tube, a delay element, a detonator, a booster, a detonating cord, an explosion switch, an explosion bolt, a starter, a cutting cord and other products.
Compared with the prior art, the invention has the beneficial effects that:
the large-pore-volume perforating bullet has the advantage of high perforation pore passage volume, and comprises a bullet shell, booster explosive, a primary shaped charge liner, a secondary shaped charge liner and a shaped charge liner fixing ring; the provided production method is simple, the prepared large-pore-volume perforating bullet can greatly improve the volume of a perforation pore channel and increase the volume of an oil flow channel, so that the oil extraction rate is improved, the problems that the existing perforating bullet cannot give consideration to both the perforation depth and the perforation pore diameter and the volume of the perforation pore channel is not high are solved, and the large-pore-volume perforating bullet has a wide market prospect.
Drawings
Fig. 1 is a schematic structural diagram of a large pore volume perforating charge provided by an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a production device for producing large-pore-volume perforating charges according to another embodiment of the invention.
Fig. 3 is a schematic structural diagram of a base in a production device for producing large-pore-volume perforating charges according to another embodiment of the invention.
Fig. 4 schematically illustrates a loading step in a method of producing a large pore volume perforator charge according to another embodiment of the present invention.
Figure 5 schematically illustrates a pressing step in a method of producing a large pore volume perforator charge according to another embodiment of the present invention.
Fig. 6 schematically illustrates a schematic diagram of a pre-pressed charge column formed after pressing in the method for producing a large-pore volume perforating charge provided by another embodiment of the invention.
Figure 7 is a schematic diagram schematically illustrating the loading of a liner in a method of producing a large capacity perforating charge according to another embodiment of the present invention.
FIG. 8 is a schematic diagram illustrating the steps of loading a liner retainer ring in a method of producing a large capacity perforating charge in accordance with another embodiment of the present invention.
In the figure: 1-cartridge case; 2-booster; 3-an explosive; 4-first-level shaped charge liner; 5-a second-level shaped charge liner; 6-shaped charge cover fixing ring; 7-a punch; 8-a righting sleeve; 9-a mold body; 10-a base; 101-a base body; 102-a closure; 103-a buffer; 104-preload piece.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention. In order to make the technical solution of the present invention clearer, process steps and device structures well known in the art are omitted here.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
Example 1
The utility model provides a large pore volume perforating bullet, as shown in figure 1, includes cartridge case 1, be provided with explosive 3 in the cartridge case 1 and be located the biography of 3 one ends of explosive explodes medicine 2, wherein, explosive 3 with biography explodes medicine 2 and constitutes pre-compaction powder column jointly, the inboard cover of pre-compaction powder column is equipped with one-level type cover 4, one-level type cover 4 is kept away from the one end that passes explosive 2 is provided with second grade type cover 5, 5 lateral walls of second grade type cover laminate in pre-compaction powder column inboard and extend to with cartridge case 1 inside wall contact, cartridge case 1 is kept away from the one end opening part that passes explosive 2 is provided with the solid fixed ring 6 of type cover, be used for with second grade type cover 5 is fixed cartridge case 1 is last and not fallen, 5 orientation of second grade type cover the one end that passes explosive 2 is provided with a circular opening.
Example 2
A production apparatus for producing the large pore volume perforating charge of example 1, as shown in fig. 2 to 3, specifically a mobile pressing mold, comprising: the explosive cartridge case comprises a die body 9 for placing the cartridge case 1 and a punch 7 for pressing the explosive 3 and the booster explosive 2 to jointly form a pre-pressed explosive column, wherein an opening at one end of the die body 9 is detachably provided with a righting sleeve 8 which is used for allowing the punch 7 to be inserted into the cartridge case 1 and limiting deviation, and a base 10 is arranged at one end, far away from the righting sleeve 8, of the die body 9.
Further, in the embodiment of the present invention, the centering sleeve 8 is sleeved on an outer circle of the opening of the die main body 9, an opening for inserting the punch 7 into the cartridge case 1 is formed in the middle of the centering sleeve 8, the diameter of the opening is the same as the diameter of the punch 7, two fine vent holes are symmetrically formed in the side surface of the centering sleeve 8, and the function of the centering sleeve is to exhaust air in a die cavity when the explosive 3 and the booster 2 are pressed to form a pre-pressed explosive column together.
Further, in the embodiment of the present invention, the base 10 includes a base main body 101 fixedly installed at one end of the mold main body 9 far from the centralizing sleeve 8, a stepped hole is formed at an axis of the base main body 101, a blocking piece 102 is detachably installed in the stepped hole, one end of the blocking piece 102 extends into the mold main body 9, a buffer piece 103 is installed at the other end of the blocking piece 102, and a pre-tightening piece 104 for fixing the buffer piece 103 and the blocking piece 102 is installed outside the buffer piece 103.
Further, in the embodiment of the present invention, the stepped hole has a structure in which the upper end is a small hole and the lower end is a large hole, the lower end large hole is provided with an internal thread, and the outer periphery of the base main body 101 is provided with a circle of semicircular groove for being conveniently held by a hand. The plugging piece 102 can be a plugging core in the prior art, and is specifically shaped as a semicircular cylinder at the bottom and a semicircular boss at the upper end; the blocking piece 102 passes through a stepped hole formed in the axis of the base body 101 and is attached to the bottom of the stepped hole, the buffering piece 103 is arranged at the bottom of the blocking piece 102, the pre-tightening piece 104 is connected in the stepped hole in a threaded connection mode (an internal thread is arranged in a large hole at the lower end of the stepped hole), the buffering piece 103 and the blocking piece 102 are fixed on the base body 101, and the blocking piece 102 contracts after bearing pressure to play a buffering role.
Further, in the embodiment of the invention, the die main body 9 is a cylinder, the internal structure of the die main body is basically consistent with the external structure of the cartridge case 1, and the cartridge case 1 filled with the booster 2 and the explosive 3 is directly loaded into the die main body 9 during pressing. The structure of the punch 7 is designed according to the structure of the primary liner 4 and the secondary liner 5, and the punch 7 penetrates through the centering sleeve 8 to complete pressing and assembly of the primary liner 4.
Example 3
A production method of a large-pore-volume perforating charge adopts the production device in embodiment 2, and specifically comprises the following steps:
1) charging: as shown in the attached figure 4, weighing booster charge 2 and pouring into the inner cavity of the cartridge case 1, weighing explosive 3 and pouring into the inner cavity of the cartridge case 1 and covering the booster charge 2, and placing the cartridge case 1 filled with the booster charge 2 and the explosive 3 into the mould main body 9, wherein the explosive 3 and the booster charge 2 are loose charges;
2) die assembly and pressing: as shown in the attached figures 5-6, the centering sleeve 8 is sleeved on the die main body 9, the centering sleeve 8 is tightly attached to the cartridge case 1 to prevent the explosive 3 from extruding, the punch 7 is placed in the cartridge case 1 and falls down by the self weight, and the punch 7 is tightly attached to the explosive 3 to complete die assembly;
then putting the production device with the cartridge case 1, the booster charge 2 and the explosive 3 into an explosion-proof hydraulic system for pressing, wherein air existing between a die cavity and an explosive particle gap in the cartridge case 1 is discharged from a vent hole on a righting sleeve 8 when pressing is carried out, taking out the production device after pressing, pulling out a punch 7, removing the righting sleeve 8, and at the moment, the loosely-loaded booster charge 2 and the explosive 3 jointly form a pre-pressed explosive column as shown in figure 6 and are tightly attached to the inner cavity of the cartridge case 1;
3) a charge type cover: as shown in the attached figure 7, a primary liner 4 is pressed in a prefabricated grain by a punch 7, a secondary liner 5 is manually assembled in a cartridge case 1 and is contacted with the prefabricated grain, and at the moment, the secondary liner 5 is tightly combined with the prefabricated grain and an inner cavity of the cartridge case 1;
4) powder-charging type cover fixing ring: as shown in fig. 8, a liner fixing ring 6 is arranged at an opening of a cartridge case 1 and is fixed on the cartridge case 1 in a bonding or riveting manner, so that the secondary liner 5 is fixed on the cartridge case 1 and does not fall off, and the large-pore-volume perforating bullet is obtained; of course, other fixing modes such as threaded connection, welding and the like can be adopted, the fixing modes are selected according to requirements, the fixing modes are not limited, a movable explosive pressing die is formed by the punch 7, the cartridge case 1 is pressed and molded to obtain pre-pressed explosive columns, and then the liner (the first-level liner 4 and the second-level liner 5) is assembled.
Example 4
A large pore volume perforator charge prepared by the method of example 3. Wherein the explosive charge of the booster explosive 2 is 1g, and the explosive charge of the explosive 3 is 42 g; one-level shaped charge cover 4 is for becoming wall thickness tungsten base shaped charge cover, the contained angle size that the both sides limit of one-level shaped charge cover 4 constitutes is 38, wall thickness 2mm, one-level shaped charge cover 4 includes following raw materials: 50kg of tungsten powder, 20kg of copper powder, 20kg of bismuth powder and 10kg of lead powder; the included angle size that two grade shape of medicine cover 5 both sides limit constitutes is 105, and the diameter 15mm of middle circular opening, height 12mm when pressing, and pressing pressure 300KN presses 2 times, pressurize 3 s.
Example 5
A large pore volume perforator charge prepared by the method of example 3. Wherein the explosive 2 has a charge of 5g, and the explosive 3 has a charge of 38 g; one-level shaped charge cover 4 is for becoming wall thickness tungsten base shaped charge cover, the contained angle size that the both sides limit of one-level shaped charge cover 4 constitutes is 42, wall thickness 3mm, one-level shaped charge cover 4 includes following raw materials: 50kg of tungsten powder, 30kg of copper powder, 20kg of bismuth powder and 10kg of lead powder; the included angle size that two sides limit of second grade shaped charge cover 5 constitutes is 115, and the diameter 12mm of middle circular opening, height 12mm when pressing, and pressing pressure 400KN presses 1 time, pressurize 6 s.
Example 6
A large pore volume perforator charge prepared by the method of example 3. Wherein the explosive 2 has the charge of 2g, and the explosive 3 has the charge of 41 g; one-level shaped charge cover 4 is for becoming wall thickness tungsten base shaped charge cover, the contained angle size that the both sides limit of one-level shaped charge cover 4 constitutes is 40, wall thickness 2.5mm, one-level shaped charge cover 4 includes following raw materials: 80kg of tungsten powder, 10kg of copper powder, 5kg of bismuth powder and 5kg of lead powder; the included angle size that the both sides limit of second grade shaped charge cover 5 constitutes is 110, and the circular open-ended diameter in middle 15mm, height 12mm when pressing, and pressing pressure 500KN presses 3 times, pressurize 2 s.
Example 7
A large pore volume perforator charge prepared by the method of example 3. Wherein the explosive 2 has a charge of 3g, and the explosive 3 has a charge of 40 g; one-level shaped charge cover 4 is for becoming wall thickness tungsten base shaped charge cover, the contained angle size that the both sides limit of one-level shaped charge cover 4 constitutes is 39, wall thickness 2.5mm, one-level shaped charge cover 4 includes following raw materials: 50kg of tungsten powder, 30kg of copper powder, 10kg of bismuth powder and 10kg of lead powder; the included angle size that the both sides limit of second grade shaped charge cover 5 constitutes is 110, and the circular open-ended diameter in middle 12mm, height 10mm when pressing, and pressing pressure 500KN presses 3 times, pressurize 2 s.
Example 8
A large pore volume perforator charge prepared by the method of example 3. Wherein the explosive 2 has a charge of 3g, and the explosive 3 has a charge of 40 g; one-level shaped charge cover 4 is for becoming wall thickness tungsten base shaped charge cover, the contained angle size that the both sides limit of one-level shaped charge cover 4 constitutes is 39, wall thickness 3mm, one-level shaped charge cover 4 includes following raw materials: 55kg of tungsten powder, 25kg of copper powder, 10kg of bismuth powder and 10kg of lead powder; the included angle size that the both sides limit of second grade shaped charge cover 5 constitutes is 115, and the diameter 12mm of middle circular opening, height 15mm when pressing, and pressing pressure 500KN presses 3 times, pressurize 2 s.
Example 9
A large pore volume perforator charge prepared by the method of example 3. Wherein the explosive 2 has a charge of 5g, and the explosive 3 has a charge of 38 g; one-level shaped charge cover 4 is for becoming wall thickness tungsten base shaped charge cover, the contained angle size that the both sides limit of one-level shaped charge cover 4 constitutes is 42, wall thickness 3mm, one-level shaped charge cover 4 includes following raw materials: 55kg of tungsten powder, 25kg of copper powder, 10kg of bismuth powder and 10kg of lead powder; the included angle size that the both sides limit of second grade shaped charge cover 5 constitutes is 115, and the diameter 12mm of middle circular opening, height 15mm when pressing, and pressing pressure 500KN presses 3 times, pressurize 2 s.
Performance detection
The large-pore-volume perforating bullets in the embodiments 4 to 9 are subjected to performance detection, specifically, 6 large-pore-volume perforating bullets are manufactured in each embodiment to perform a perforation performance detection test, the average pore diameter of a simulated casing and the perforation depth of a steel target/concrete target are tested by using a detection method disclosed by the utility model patent with the authorization publication number of CN203716943U, the volume of a perforation pore passage is measured by adopting a water injection method, the volume improvement rate of the perforation pore passage is calculated by comparing the volume of the perforation pore passage with the volume of the perforation pore passage of the perforating bullet with the same pore diameter in the existing product, and specific results are shown in Table 1.
TABLE 1 test results Table
| Group of | Average pore diameter | Depth of perforation | Rate of increase in pore volume |
| Example 4 | 20.7mm | 183mm (Steel target) | 15.3％ |
| Example 5 | 22.2mm | 176mm (Steel target) | 15.9％ |
| Example 6 | 20mm | 172mm (Steel target) | 15.4％ |
| Example 7 | 22.1mm | 660mm (concrete target) | 22％ |
| Example 8 | 22.1mm | 683mm (concrete target) | 25％ |
| Example 9 | 22.3mm | 657mm (concrete target) | 21.8％ |
As can be seen from the comparison of the data in the table 1, in the perforating bullet steel target penetration test, the average aperture of the simulated casing is more than 20mm, the perforation depth of the steel target is more than 160mm, and the volume of the perforation pore passage measured by a water injection method is increased by more than 15% compared with the volume of the perforation pore passage of the perforating bullet with the same aperture; in a perforating bullet concrete penetration test, the average aperture of a simulated casing is more than 20mm, the penetration depth of a concrete target is more than 640mm, and the volume of a perforation channel measured by a water injection method is improved by more than 20% compared with the volume of the perforation channel of the perforating bullet with the same aperture. It should be noted that, in recent years, perforating bullet manufacturers at home and abroad successively developed novel perforating bullets such as ultra-deep penetration perforating bullets, large-aperture perforating bullets and equal-aperture perforating bullets, wherein the perforating depth of a concrete target of the ultra-deep penetration perforating bullet reaches 1809mm, and the diameter of a pore passage of the large-aperture perforating bullet reaches 22.3 mm.
The invention has the advantages that the large-pore-volume perforating bullet has the advantage of high perforation pore passage volume, the large-pore-volume perforating bullet comprises a bullet shell 1, an explosion transfer powder 2, an explosive 3, a primary shaped charge cover 4, a secondary shaped charge cover 5 and a shaped charge cover fixing ring 6, the explosion transfer powder 2 and the explosive 3 are filled in the inner cavity of the bullet shell 1, a pre-pressed powder charge with a preset structure is formed through a hydraulic system, the primary shaped charge cover 4 and the secondary shaped charge cover 5 form a double-layer shaped charge cover, the double-layer shaped charge cover is pushed to form superposed metal jet flow after the explosive explodes to realize perforation and reaming, and the large-pore-volume perforating bullet is capable of simultaneously considering the perforation depth and the perforation pore diameter, solving the prominent problems that the perforation pore diameter of the existing perforating bullet with high perforation depth is small, the perforation depth of the perforating bullet with large perforation pore diameter is low, and the two key indexes of the perforation depth and the perforation, the prepared large-pore-volume perforating bullet can greatly improve the volume of a perforation pore channel and increase the volume of an oil flow channel, thereby improving the oil extraction rate, solving the problems that the existing perforating bullet cannot simultaneously consider the perforation depth and the perforation pore diameter and has low volume of the perforation pore channel and having wide market prospect.
The electric appliances presented in the article can be connected with an external main controller and 220V mains supply, and the main controller can be a conventional known device controlled by a computer and the like.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The standard parts used by the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part can adopt the conventional means of mature bolts, rivets, welding and the like in the prior art, and the detailed description is not repeated.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. The utility model provides a large pore volume perforating bullet, includes the shell case, be provided with the explosive in the shell case and be located the booster charge of explosive one end, the explosive with booster charge constitutes pre-compaction explosive column jointly, its characterized in that, large pore volume perforating bullet still includes:
one-level shaped charge cover, the cover is established pre-compaction grain is inboard, one-level shaped charge cover is kept away from the one end that the booster burst medicine is provided with second grade shaped charge cover, second grade shaped charge cover lateral wall laminate in pre-compaction grain is inboard and extend to with shell case inside wall contact to and
the second-level liner fixing ring is arranged at an opening at one end of the cartridge case, which is far away from the booster explosive, and is used for fixing the second-level liner on the cartridge case without falling off, and a round opening is formed at one end of the second-level liner, which faces the booster explosive;
wherein the angle formed by the two side edges of the first-stage liner is 38-42 degrees, and the angle formed by the two side edges of the second-stage liner is 105-115 degrees.
2. The large pore volume perforating charge of claim 1, wherein the primary liner comprises the following raw materials in parts by weight: 40-80 parts of tungsten powder, 10-30 parts of copper powder, 5-20 parts of bismuth powder and 5-10 parts of lead powder.
3. The large pore volume perforating bullet of claim 1, wherein the wall thickness of said primary liner is 2mm to 3mm, and said secondary liner is a copper plate liner of equal wall thickness and 12mm to 20mm in height.
4. The large pore volume perforator charge of claim 1 wherein the circular opening in the secondary liner has a diameter of 6mm to 15 mm.
5. A production apparatus for producing the large pore volume perforator charge of any of claims 1-4, wherein the production apparatus comprises: the explosive cartridge case comprises a die main body and a punch, wherein the die main body is used for placing the cartridge case, the punch is used for pressing the explosive and the booster explosive to jointly form a pre-pressed explosive column, an opening at one end of the die main body is detachably provided with a righting sleeve which is used for allowing the punch to be inserted into the cartridge case and limiting deviation, and a base is arranged at one end, far away from the righting sleeve, of the die main body.
6. The production device of claim 5, wherein the centering sleeve is sleeved on an outer circle of the opening of the die body, an opening for the punch to be inserted into the cartridge case is formed in the middle of the centering sleeve, the diameter of the opening is the same as that of the punch, and two fine vent holes are symmetrically formed in the side surface of the centering sleeve.
7. The production device according to claim 5, wherein the base comprises a base body fixedly mounted at one end of the mold body away from the centralizing sleeve, a stepped hole is formed in the axis of the base body, a blocking piece is detachably mounted in the stepped hole, one end of the blocking piece extends into the mold body, a buffer piece is arranged at the other end of the blocking piece, and a pre-tightening piece for fixing the buffer piece and the blocking piece is arranged outside the buffer piece.
8. The method for producing the large-pore-volume perforating charge as claimed in any one of claims 1 to 4, characterized in that the method for producing the large-pore-volume perforating charge adopts the production device as claimed in any one of claims 5 to 7, and comprises the following steps:
1) pouring booster explosive into the inner cavity of the cartridge case, then pouring explosive into the inner cavity of the cartridge case and covering the booster explosive, and placing the booster explosive and the explosive together in the die main body of the production device to finish charging;
2) sleeving a centering sleeve on a die main body, enabling the centering sleeve to be tightly attached to a cartridge case, putting a punch into the cartridge case, then, dropping the punch to be attached to an explosive, pressing the explosive and the booster explosive to form a pre-pressed explosive column, pulling out the punch, removing the centering sleeve, and finishing pressing;
3) and (3) pressing the primary liner in the prefabricated explosive column by adopting a punch, assembling the secondary liner in the cartridge case and contacting the prefabricated explosive column, and then placing the liner fixing ring at the opening of the cartridge case and fixing the liner fixing ring on the cartridge case to obtain the large-pore-volume perforating bullet.
9. The method for producing a large pore volume perforating charge as claimed in claim 8, characterized in that the pressing pressure is 300KN-500KN, 1-3 times, 2s-6s dwell time each time.
10. A large pore volume perforator charge produced by the method of any one of claims 8 to 9.
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| CN113532203A (en) * | 2021-07-22 | 2021-10-22 | 北京理工大学 | Shaped charge structure capable of forming omnidirectional distributed composite active projectile |
| CN113607004A (en) * | 2021-07-22 | 2021-11-05 | 北京理工大学 | Energy-gathering charge structure capable of forming scarf joint type metal and active double penetration bodies |
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