CN216240575U - Sand-proof perforating bullet for loose sandstone reservoir - Google Patents
Sand-proof perforating bullet for loose sandstone reservoir Download PDFInfo
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- CN216240575U CN216240575U CN202120974971.1U CN202120974971U CN216240575U CN 216240575 U CN216240575 U CN 216240575U CN 202120974971 U CN202120974971 U CN 202120974971U CN 216240575 U CN216240575 U CN 216240575U
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- perforating bullet
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Abstract
The utility model discloses a perforating bullet for sand prevention of a loose sandstone reservoir, belonging to the field of petroleum perforation; the perforating bullet for sand control of the unconsolidated sandstone reservoir can provide an oversized jet flow hole and a deeper jet flow penetration depth, improves the gravel filling amount, and effectively solves the technical problem of shaft sand blocking caused by formation sand production. The perforating bullet comprises a perforating bullet shell, high-energy explosive, a partition plate and a shaped charge cover, wherein the lower part of an inner cavity of the perforating shell is of a cylindrical structure, and the middle part and the upper part of the inner cavity of the perforating shell are of conical structures; the clapboard is in a round thin plate structure; the upper section of the shaped charge cover is of a spherical structure, the lower section of the shaped charge cover is of a conical structure, and the perforating charge shell, the partition plate and the shaped charge cover are coaxial when assembled. After the perforating bullet explodes, the clapboard transmits the kinetic energy of the perforating bullet to the shaped charge cover, the jet speed of the shaped charge cover is increased, the convergence angle of the shaped charge cover can be changed, and the jet reaming effective quality and the reaming energy are improved. The application of the oil-gas composite material in loose sandstone reservoirs can effectively prevent sand from blocking holes and improve the oil-gas recovery efficiency and yield.
Description
Technical Field
The utility model belongs to the field of petroleum perforation, and particularly relates to a perforating bullet for sand prevention of a unconsolidated sandstone reservoir.
Background
At present, loose sandstone reservoirs in China have a large distribution range, large reserves and high yield and play an important role in producing oil and oil, and the sand production of oil and gas wells is a main contradiction in the exploitation of the oil and gas reservoirs in the process of perforation exploitation operation.
The sand production of the oil and gas well can cause sand-buried oil and gas layers or shaft sand blocking to cause the production stop of the oil and gas well, so that the ground and underground equipment are seriously abraded and sand-blocked, and the well wall collapse can be caused to damage the casing pipe in serious conditions, so that the maintenance workload of subsequent sand washing pump detection, ground tank cleaning and the like is increased greatly, the oil extraction production cost is improved, and the oil and gas field exploitation difficulty is increased.
According to the existing operation process of filling gravels after the production perforation of the unconsolidated sandstone reservoir, an oversized perforation hole diameter and a deep penetration type perforating bullet with the diameter of more than 30mm are required to be generated on a casing. However, the existing perforating bullet has a structural limitation of smaller caliber in structure, and the effective jet mass generated after the liner explosion is less, the jet inlet hole is small, and the deep penetration capability is weaker.
In conclusion, the conventional perforating bullet cannot meet the use requirement of the conventional unconsolidated sandstone reservoir on the perforating bullet, and a novel sand-preventing perforating bullet for the unconsolidated sandstone reservoir is urgently needed.
Disclosure of Invention
The technical problem solved by the utility model is as follows: in order to solve the defects of small aperture and shallow penetration depth generated in the hole-in pore canal of the existing perforating bullet in the stratum of the unconsolidated reservoir, the utility model designs the perforating bullet for sand prevention of the unconsolidated sandstone reservoir.
The technical scheme of the utility model is as follows: the perforating bullet for sand prevention of the loose sandstone reservoir comprises a perforating bullet shell, high-energy explosives, a partition plate and a shaped charge cover, wherein the shaped charge cover, the high-energy explosives and the perforating bullet shell are coaxially arranged from inside to outside in sequence;
the liner (4) is integrally formed by stamping an upper section spherical surface and a lower section conical surface, a through hole is formed in the center, the radius close to the through hole is defined as R3, the radius far away from the center and close to the lower end is defined as R2, the lower end is provided with an opening, the radial distance between the two ports is delta 1, wherein R2 is more than R3, and the delta 1 is [0.8mm, 1.5mm ];
the partition plate is made of copper, steel or tungsten materials, is arranged between the high-energy explosive and the shaped charge liner and is arranged on a central hole of the shaped charge liner, and can completely cover the central hole; the hardness of the clapboard is greater than that of the liner;
the lower part of the inner cavity of the perforating bullet shell is cylindrical, the upper part and the middle part of the inner cavity of the perforating bullet shell are in a circular truncated cone shape, and the opening diameter of the perforating bullet shell
Is [65mm,70mm ]]。
The further technical scheme of the utility model is as follows: the partition board is a cylinder with the diameter
Is [11mm, 13mm ]]The thickness H1 is [0.8mm, 2.0mm ]]。
The further technical scheme of the utility model is as follows: the separator has a chamfer R1, and R1 is located at [0.2mm, 0.5mm ].
The further technical scheme of the utility model is as follows: the high-energy explosive is a hexogen explosive, and the explosive loading is [45g, 52g ].
The further technical scheme of the utility model is as follows: the cone angle theta 1 of the upper circular truncated cone of the perforating bullet shell ranges from [118 degrees ] to [ 125 degrees ], the cone angle theta 2 of the middle circular truncated cone ranges from [75 degrees ] to [ 85 degrees ], and the cone angle theta 1 and the cone angle theta 2 are coaxial.
The further technical scheme of the utility model is as follows: the shaped charge liner is made of copper alloy materials through stamping.
Effects of the utility model
The utility model has the technical effects that: the design of the explosive cover is improved, and the partition plate structure is added, so that the distribution of the explosive in the explosive charging cavity is more reasonable, the utilization rate of the explosion energy of the high-energy explosive is improved through the partition plate, and the optimal explosion energy output effect can be achieved. Because the hardness of the partition plate is greater than that of the shaped charge cover, and the partition plate is tightly attached to the end face of the center hole of the shaped charge cover, after the explosive explodes, detonation waves energize the detonation energy to the center hole of the shaped charge cover through the partition plate, the head jet flow speed is increased, the perforation depth is improved, meanwhile, the detonation waves are influenced by the partition plate, high-pressure detonation is formed to the two sides of the center hole by the detonation waves, more energy is provided for the conical surfaces of the middle lower part of the shaped charge cover, the material utilization rate of the shaped charge cover is increased, and the hole expanding capacity of the shaped charge cover is improved. In the prior art, a certain distance is reserved between the partition plate and the liner, the partition plate only plays a role in changing the detonation wave waveform in the structure, and the partition plate has a certain effect of improving the head jet velocity of the liner and has no effect on reaming of the liner.
Therefore, in the sand control operation process of the sand filter pipe of the casing perforation of the unconsolidated sandstone reservoir, the sand control type perforating bullet forms larger holes on the casing, and has the characteristics of large jet flow inlet hole aperture and deep penetration.
Proved by verification, the 178-type perforating bullet manufactured by the utility model is filled into a 178-type perforating gun (the hole density is 40 holes/m, the phase is 135 degrees/45 degrees), the gun is placed in a 9-5/8' sleeve in the middle during gun distribution, API standard concrete targets are penetrated, the average perforation depth reaches 365mm through detection, the average pore size on the sleeve is 32.0mm, and through a large amount of scheme adjustment, mould processing, test and effect comparison, the 178-type large-pore-diameter perforating bullet manufactured by the utility model is improved by more than 10 percent in the sleeve pore size and the penetration depth of the concrete targets is improved by more than 50 percent compared with 178-type large-pore-diameter perforating bullets produced by other perforating bullet factories at home and abroad.
Drawings
FIG. 1 is a schematic diagram of the overall assembly of the perforating charge of the present invention.
Figure 2 is a schematic structural diagram of the perforating charge case of the present invention.
Fig. 3 is a schematic structural view of the separator of the present invention.
FIG. 4 is a schematic view of the liner of the present invention.
Description of reference numerals: 1-perforating bullet case; 2-a partition board; 3-high explosive; 4-shaped charge liner; theta 1-cone angle of the upper part of the perforating bullet shell; theta 2-cone angle of the middle part of the perforating bullet shell;
-perforating charge case opening diameter; r1-baffle chamfer;
-the diameter of the partition; h1 — separator thickness;
-liner through hole diameter; r2-outside diameter of the liner spherical surface; r3-inside diameter of the liner sphere; theta 3-liner taper angle; delta 1-liner wall thickness.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of 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 considered as limiting the present invention.
Referring to fig. 1-4, the perforating bullet designed by the utility model can generate larger casing aperture and deeper perforation depth, is beneficial to the gravel packing sand prevention effect of a loose rock stratum, can firmly pack gravel, can greatly improve oil and gas recovery ratio, and becomes one of the main measures for increasing production of the loose oil and gas sand prevention.
A perforating bullet for sand control of a loose sandstone reservoir comprises a perforating bullet shell 1, a partition plate 2, a high-energy explosive 3 and a shaped charge cover 4; the lower part of the inner cavity of the perforating bullet shell 1 is of a cylindrical structure, and the upper part and the middle part of the inner cavity of the perforating bullet shell are of conical structures; the clapboard 2 is a cylinder with a certain thickness; the upper section of the shaped charge liner 4 is of a spherical structure, the lower section of the shaped charge liner is of a conical structure, and the upper section and the lower section are coaxial; during assembly, the perforating bullet shell, the partition plate and the shaped charge liner are coaxial.
The cone angle theta 1 of the upper round platform of the perforating bullet shell 1 is [118 degrees ], 125 degrees]The cone angle theta 2 of the middle round platform is [75 degrees ], 85 degrees DEG]The cone angle theta 1 and the cone angle theta 2 are coaxial, and the opening diameter of the cartridge case
At [65mm,70mm ]]In the meantime.
The R1 of the structure of the clapboard 2 is in the range of 0.2mm and 0.5mm]In the above-mentioned manner,
at [11mm, 13mm ]]H1 is in the range of [0.8mm, 2.0mm]In the meantime. The material of the separator 2 can be copper, steel or tungsten.
The high-energy explosive 3 is a hexogen explosive with the explosive loading of [45g, 52g ].
The liner 4 is made of copper alloy materials by stamping, and the inner diameter R3 of the upper section of the spherical structure is between [20mm and 27mm ]; the lower tapered structure has a taper angle α 1 of between [55 °, 68 ° ].
The outer diameter R2 of the spherical structure of the upper section of the perforating charge type cover 4 for sand control of the loose sandstone reservoir is more than R3, and delta 1 is between [0.8mm and 1.5mm ].
The upper section of the shaped charge liner 4 is punched on the axis of the spherical structure with the diameter of
The coaxial through-hole of (a) is,
at [8mm, 11mm ]]In the meantime.
Referring to fig. 1, a clapboard 2 is attached to a shaped charge cover 4 coaxially, and a high-energy explosive 3 is laid between a perforating charge shell 1 and the shaped charge cover 4. a. The liner 4 is a copper alloy liner and is integrally formed by stamping an upper section spherical surface and a lower section conical surface, and the liner structure can better ensure the coaxiality of all axial cross sections of the liner in the processing process. Adopts a spherical shape at the upper part,The conical shaped charge liner structure at the lower half part can realize the purposes of small aperture of the perforating gun body, large sleeve aperture and no reduction of penetration depth, and has great improvement compared with the traditional large-aperture perforating charge liner structure. b. The perforating bullet case 1 is a metal case, the lower part of the inner cavity is cylindrical, the upper part and the middle part are cone-shaped in a circular truncated cone shape, and in order to realize the aperture of an oversized jet flow inlet hole with the diameter of more than 30mm, the opening diameter of the perforating bullet case 1
Is [65mm,70mm ]]In the meantime.
The partition board 2 is made of copper, steel and tungsten materials and has a diameter
At [11mm, 13mm ]]H1 is in the range of [0.8mm, 2.0mm]The surface is smooth, and the chamfer angle R1 of the clapboard 2 is [0.2mm, 0.5mm ]]In the meantime. The separator 2 is required to have a hardness exceeding that of the liner 4.
The partition plate 2 and the liner 4 are coaxially assembled, the partition plate 2 is placed on a through hole of the liner 4, the kinetic energy of the partition plate 2 can be transferred to the liner 4, and the jet speed of the liner 4 is increased; the baffle 2 can also increase the convergence angle of the shaped charge liner 4 after overturning, increase the effective mass of jet flow, and generate an ultra-large aperture on the sleeve.
When the method is used for manufacturing, a die is firstly installed on a punching machine, a copper alloy plate is punched into a shaped charge cover 4, the punched shaped charge cover 4 is inspected to be qualified and then is sent to a perforating bullet press-mounting process, then the weighed high-energy explosive 2 is injected into a bullet case 1 with a hole accurately, the shapes of a partition plate 2 and the shaped charge cover 4 are pre-pressed firstly by using a pre-pressing process, then the partition plate 2 is loaded into a pre-pressed high-energy explosive model, then the shaped charge cover 4 is loaded into the pre-pressed high-energy explosive model, and the shaped charge cover 4 is pressed into the perforating bullet case 1 by using a bullet pressing device, so that the close fit of the partition plate 2 and the shaped charge cover 4 is ensured, the close fit of the shaped charge cover 4 and the high-energy explosive 2 is ensured, and the manufacturing of the perforating bullet is completed.
The specific embodiment is as follows: the perforating bullet shell is made of steel bullet shell, the upper taper angle theta 1 of the perforating bullet shell is 122 degrees, the middle taper angle theta 2 of the perforating bullet shell is 58 degrees, and the opening diameter of the perforating bullet shell
Is 69 mm.
The partition plate is made of tungsten material and has a diameter
At 11mm, the thickness H1 of the partition board is 1.2mm, the surface is smooth, and the chamfer R1 of the partition board is 0.3 mm.
The liner is a copper-zinc alloy stamping liner, the outer diameter R2 of the upper section of spherical structure is 23mm, the inner diameter R3 of the upper section of spherical structure is 22mm, the taper angle alpha 1 of the lower section of conical structure is 60 degrees, the wall thickness delta 1 of the liner is 1.2mm, and the diameter of the through hole of the liner is 1.2mm
Is 10 mm.
The high-energy explosive is filled with hexogen in a type of 50 g.
The 178-type loose sandstone oil reservoir sand-prevention perforating bullet manufactured by the utility model is filled into a 178-type perforating gun (the hole density is 40 holes/m, the phase is 135 degrees/45 degrees), the perforating gun is placed into a 9-5/8' sleeve in the middle during gun distribution, an API standard concrete target is penetrated, the average perforation depth reaches 365mm through detection, and the size of the jet flow inlet hole on the sleeve is 32.0 mm.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The perforating bullet for sand control of the loose sandstone reservoir comprises a perforating bullet shell (1) and high-energy explosives (3), and is characterized by further comprising a partition plate (2) and a shaped charge cover (4), wherein the shaped charge cover (4), the high-energy explosives (3) and the perforating bullet shell (1) are coaxially arranged from inside to outside in sequence;
the liner (4) is integrally formed by stamping an upper section spherical surface and a lower section conical surface, a through hole is formed in the center, the radius close to the through hole is defined as R3, the radius far away from the center and close to the lower end is defined as R2, the lower end is provided with an opening, the radial distance between the two ports is delta 1, wherein R2 is more than R3, and the delta 1 is [0.8mm, 1.5mm ];
the partition plate (2) is made of copper, steel or tungsten materials, is arranged between the high-energy explosive (3) and the shaped charge liner (4) and is arranged on a central hole of the shaped charge liner (4), and the partition plate (2) can completely cover the central hole; the hardness of the clapboard (2) is greater than that of the liner (4);
the lower part of the inner cavity of the perforating bullet case (1) is cylindrical, the upper part and the middle part are in a circular truncated cone shape, and the opening diameter of the perforating bullet case (1)
Is [65mm,70mm ]]。
2. The perforating bullet for sand control in unconsolidated sandstone reservoir as claimed in claim 1, wherein the separator (2) is a cylinder with a diameter
Is [11mm, 13mm ]]The thickness H1 is [0.8mm, 2.0mm ]]。
3. The perforating bullet for sand control in unconsolidated sandstone reservoir of claim 2, wherein the separator (2) has a chamfer R1, and R1 is located at [0.2mm, 0.5mm ].
4. The perforating bullet for sand control in unconsolidated sandstone reservoirs of claim 1, wherein the high explosive (3) is hexogen and has a loading of [45g, 52g ].
5. The perforating bullet for sand control of the unconsolidated sandstone reservoir as claimed in claim 1, wherein the cone angle theta 1 of the upper part of the perforating bullet shell (1) is within the range of [118 degrees and 125 degrees ], the cone angle theta 2 of the middle part is within the range of [75 degrees and 85 degrees ], and the cone angle theta 1 and the cone angle theta 2 are coaxial.
6. The perforating bullet for sand control in unconsolidated sandstone reservoir as claimed in claim 1, wherein the liner (4) is made of copper alloy material by punching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120974971.1U CN216240575U (en) | 2021-05-09 | 2021-05-09 | Sand-proof perforating bullet for loose sandstone reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120974971.1U CN216240575U (en) | 2021-05-09 | 2021-05-09 | Sand-proof perforating bullet for loose sandstone reservoir |
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| Publication Number | Publication Date |
|---|---|
| CN216240575U true CN216240575U (en) | 2022-04-08 |
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ID=80938846
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120974971.1U Active CN216240575U (en) | 2021-05-09 | 2021-05-09 | Sand-proof perforating bullet for loose sandstone reservoir |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116625175A (en) * | 2023-07-25 | 2023-08-22 | 吉林市双林射孔器材有限责任公司 | Large-aperture pressurizing perforating bullet |
-
2021
- 2021-05-09 CN CN202120974971.1U patent/CN216240575U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116625175A (en) * | 2023-07-25 | 2023-08-22 | 吉林市双林射孔器材有限责任公司 | Large-aperture pressurizing perforating bullet |
| CN116625175B (en) * | 2023-07-25 | 2023-09-19 | 吉林市双林射孔器材有限责任公司 | Large-aperture pressurizing perforating bullet |
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