CN212837726U - Perforating device and system for horizontal well - Google Patents
Perforating device and system for horizontal well Download PDFInfo
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- CN212837726U CN212837726U CN202020905960.3U CN202020905960U CN212837726U CN 212837726 U CN212837726 U CN 212837726U CN 202020905960 U CN202020905960 U CN 202020905960U CN 212837726 U CN212837726 U CN 212837726U
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Abstract
The utility model provides a horizontal well is with perforation device and system. The perforating device for the horizontal well comprises a perforating gun and a perforating unit arranged in the perforating gun; the perforating unit comprises a charge frame and a plurality of perforating bullets arranged in the charge frame, the axis of the charge frame is superposed with the axis of the perforating gun, and the charge frame can be rotatably connected in the perforating gun around the axis direction of the charge frame; the inner surface of the bullet frame is also provided with a balancing weight; the multiple-shooting-hole bullets are respectively arranged along the bullet rack at intervals in the axial direction, and the axis of each shooting-hole bullet and the axis of the bullet rack form a preset included angle, so that the intersection points of the extension lines of the axes of the multiple-shooting-hole bullets and the wall of the sleeve are distributed on the same cross section of the sleeve. The utility model provides a perforating device and system for horizontal well, the device both can realize the fixed surface perforation, can realize directional perforation again, need not to change perforating device, easy operation, and efficient.
Description
Technical Field
The utility model relates to an oil gas exploitation technical field especially relates to a horizontal well is with perforation device and system.
Background
In staged fracturing of a casing completion horizontal well, the perfection degree of a seam network system determines whether the maximum oil drainage area can be obtained in a reservoir, and the development of reservoir cracks has great influence on the perfection degree of the seam network system. In the staged fracturing process of the horizontal well, perforation operation must be carried out on the casing before fracturing is carried out, perforation operation can form perforations on a reservoir stratum, stress concentration of a guide duct is facilitated, and a foundation is laid for forming a seam net for a subsequent reservoir stratum.
In the prior art, a perforating device generally comprises a fixed-face perforating device and a directional perforating device, the fixed-face perforating device can be used for fixed-face perforating, a plurality of hole edges can be formed on the same cross section of a casing through the fixed-face perforating device, and after fracturing is implemented, the trend of cracks is radially expanded along a shaft. The directional perforating device can be used for directional perforating, perforations are formed in the directional perforating in the preset direction, and after fracturing is implemented, the fracture trend can be expanded along the preset direction. The fixed-face perforating device is suitable for the condition that a well track is positioned in an oil layer, and the oil drainage area after fracturing can be increased. The directional perforating device is suitable for the condition that the well track deviates from an oil layer, and can enable the cracks to extend towards the direction of the oil layer, so that the contribution rate of the fracturing productivity is improved.
However, for some special oil wells, fixed-face perforation and directional perforation are required to be performed simultaneously, at this time, the fixed-face perforation device is required to be used for completing the fixed-face perforation, and then the directional perforation device is required to be replaced for performing the directional perforation, so that the process needs to be replaced, the operation is complex, and the efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model provides a perforating device and system for horizontal well to overcome the problem that constant surface perforating device and directional perforating device change the difficulty among the prior art.
The utility model provides a perforating device for horizontal well, include: the perforating gun comprises a perforating gun and a perforating unit arranged in the perforating gun.
The perforating unit comprises a charge carrier and a plurality of shot-hole charges arranged in the charge carrier, the axis of the charge carrier is superposed with the axis of the perforating gun, and the charge carrier can rotate around the axis direction of the charge carrier in the perforating gun; the inner surface of the bullet frame is also provided with a balancing weight.
The multiple-shot-hole bullets are respectively arranged along the axial direction of the bullet rack at intervals, and the axis of each shot of the perforating bullet and the axis of the bullet rack form a preset included angle, so that the intersection points of the extension lines of the axes of the multiple-shot-hole bullets and the wall of the casing are distributed on the same cross section of the casing.
The perforating device for the horizontal well comprises a body and two connecting sections arranged at two ends of the body, wherein the perforating bullet and the balancing weight are arranged in the body, and the diameter size of the connecting sections is smaller than that of the body; a bearing is sleeved outside the connecting section, and the outer surface of the bearing is fixedly connected with the inner surface of the perforating gun; and an end cover used for abutting against the side surface of the bearing is arranged on the end surface of each connecting section.
The horizontal well perforating device as described above, wherein the weight block extends in a radial direction of the magazine, and a dimension of the weight block in the radial direction is smaller than a radial dimension of the magazine.
The perforating device for the horizontal well is characterized in that the number of the balancing weights is multiple, and the balancing weights are arranged at intervals along the axial direction of the bullet rack.
The perforating device for the horizontal well comprises a connecting piece, wherein the connecting piece comprises a connecting piece body, a suspension part and a connecting part, the suspension part and the connecting part are arranged on the connecting piece body, the connecting part is used for being fixedly connected with the charge rack, and the suspension part is used for fixing the perforating charges.
The perforating device for the horizontal well is characterized in that the bullet rack is provided with a mounting hole and a through hole, the connecting part comprises a buckle clamped with the hole wall of the mounting hole and a threaded hole coaxial with the through hole, and a screw passes through the through hole and is matched with the threaded hole.
The perforating device for the horizontal well is characterized in that the hanging part comprises a first hanging piece clamped on the connecting piece body, an annular groove is formed on the perforating bullet, and a first hole used for being clamped with the annular groove is formed on the first hanging piece; the axis of the first hole and the axis of the bullet rack form the preset included angle.
The horizontal well perforating device comprises a connecting piece body, a hanging part and a connecting part, wherein the hanging part further comprises a second hanging piece clamped on the connecting piece body, the first hanging piece and the second hanging piece are arranged in parallel, and a second hole for accommodating the perforating bullet is formed in the second hanging piece.
The horizontal well perforating device is characterized in that the perforating units are arranged in a plurality, and the plurality of perforating units are arranged at intervals along the axial direction of the perforating gun.
The utility model also provides a perforation system for horizontal well, including the sleeve pipe and as above horizontal well perforating device, the sleeve pipe cover is established outside horizontal well perforating device.
The utility model provides a perforating device and a system for horizontal wells, which comprises a perforating gun and a perforating unit arranged in the perforating gun; the perforating unit comprises a charge frame and a plurality of perforating bullets arranged in the charge frame, the axis of the charge frame is superposed with the axis of the perforating gun, and the charge frame can be rotatably connected in the perforating gun around the axis direction of the charge frame; the inner surface of the bullet frame is also provided with a balancing weight; the multiple-shooting-hole bullet is respectively arranged along the axial direction of the bullet frame at intervals, the axis of each shooting-hole bullet and the axis of the bullet frame form a preset included angle, so that the intersection points of the extension lines of the axes of the multiple-shooting-hole bullets and the casing wall are distributed on the same cross section of the casing, fixed-plane perforation is realized, in addition, the position of the balancing weight can be adjusted, directional perforation towards the preset direction is realized, namely, the device can realize fixed-plane perforation, directional perforation can be realized, the perforating device does not need to be replaced, the operation is simple, and the efficiency is high.
Drawings
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the embodiments described herein are merely illustrative and explanatory of the present invention, and the present invention is not limited to the embodiments described below.
Fig. 1 is a schematic structural view of the perforation system for a horizontal well according to the present invention;
FIG. 2 is a schematic structural diagram of the horizontal well perforating device of the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 1;
FIG. 4 is a schematic view of the connection of the connector of FIG. 3 to a perforating charge;
FIG. 5 is a schematic structural view of the connector of FIG. 3;
figure 6 is a schematic diagram of the configuration of the charge of figure 3.
Description of reference numerals:
1: a perforating gun; 2: a cartridge frame;
21: a body; 22: a connecting section;
23: a bearing; 24: an end cap;
25: mounting holes; 26: a through hole;
3: a perforating charge; 31: an annular groove;
4: a balancing weight; 5: a connecting member;
51: a connector body; 52: a connecting portion;
521: buckling; 522: a threaded hole;
53: a hanging part; 531: a first suspension member;
532: a second suspension member; 6: a sleeve.
Detailed Description
In staged fracturing of a casing completion horizontal well, the perfection degree of a seam network system determines whether the maximum oil drainage area can be obtained in a reservoir, and the development of reservoir cracks has great influence on the perfection degree of the seam network system. In the staged fracturing process of the horizontal well, perforation operation must be carried out on the casing before fracturing is carried out, perforation operation can form perforations on a reservoir stratum, stress concentration of a guide duct is facilitated, and a foundation is laid for forming a seam net for a subsequent reservoir stratum.
In the prior art, a perforating device generally comprises a fixed-face perforating device and a directional perforating device, the fixed-face perforating device can be used for fixed-face perforating, a plurality of hole edges can be formed on the same cross section of a casing through the fixed-face perforating device, and after fracturing is implemented, the trend of cracks is radially expanded along a shaft. The directional perforating device can be used for directional perforating, perforations are formed in the directional perforating in the preset direction, and after fracturing is implemented, the fracture trend can be expanded along the preset direction. The fixed-face perforating device is suitable for the condition that a well track is positioned in an oil layer, and the oil drainage area after fracturing can be increased. The directional perforating device is suitable for the condition that the well track deviates from an oil layer, and can enable the cracks to extend towards the direction of the oil layer, so that the contribution rate of the fracturing productivity is improved.
However, for some special oil wells, fixed-face perforation and directional perforation are required to be performed simultaneously, at this time, the fixed-face perforation device is required to be used for completing the fixed-face perforation, and then the directional perforation device is required to be replaced for performing the directional perforation, so that the process needs to be replaced, the operation is complex, and the efficiency is low.
In order to solve the problem, the utility model provides a horizontal well is with perforation device and system to make horizontal well is with perforation device can realize fixed face perforation and directional perforation simultaneously.
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the embodiments described herein are merely illustrative and explanatory of the present invention, and the present invention is not limited to the embodiments described below.
Fig. 1 is a schematic structural view of the perforation system for a horizontal well according to the present invention; FIG. 2 is a schematic structural diagram of the horizontal well perforating device of the present invention; FIG. 3 is an enlarged view of a portion A of FIG. 1; FIG. 4 is a schematic view of the connection of the connector of FIG. 3 to a perforating charge; FIG. 5 is a schematic structural view of the connector of FIG. 3; figure 6 is a schematic diagram of the configuration of the charge of figure 3.
Referring to fig. 1 to 6, the present embodiment provides a horizontal well perforation device, including: a perforating gun 1 and a perforating unit arranged in the perforating gun 1. The perforating unit comprises a charge carrier 2 and a plurality of perforating charges 3 arranged in the charge carrier 2, the axis of the charge carrier 2 is superposed with the axis of the perforating gun 1, and the charge carrier 2 can rotate around the axis of the charge carrier 2 in the perforating gun 1; the inner surface of the bullet frame 2 is also provided with a balancing weight 4. The multiple-shooting-hole bullets 3 are respectively arranged along the axial direction of the bullet frame 2 at intervals, and the axis of each shooting-hole bullet 3 and the axis of the bullet frame 2 form a preset included angle, so that the intersection points of the extension lines of the axes of the multiple-shooting-hole bullets 3 and the wall of the sleeve 6 are distributed on the same cross section of the sleeve 6.
In particular, the horizontal well perforating device can be used for reservoirs needing directional perforation and also can be used for reservoirs needing fixed-face perforation, and particularly can be used for reservoirs needing both directional perforation and fixed-face perforation.
The horizontal well perforating apparatus comprises a perforating gun 1 located in a casing 6 and a perforating unit arranged in the perforating gun 1, wherein the perforating unit can shoot a perforating bullet 3 so as to form perforations on the casing 6 and a reservoir layer and provide guidance for subsequent fracturing.
The perforating gun 1 can be a hollow tubular structure as a main structure, and the axial direction of the perforating gun can be coincident with the axial direction of the casing 6. The charges 3 may pass through the inner wall of the gun 1 and form perforations in the casing 6.
The perforating unit is used as a main device for forming perforations, can be arranged in the perforating gun 1, and can comprise a charge carrier 2 and a perforating charge 3, the charge carrier 2 can also be of a hollow tubular structure, and the axial direction of the charge carrier 2 is coincident with the axial direction of the perforating gun 1. The charge carrier 2 is arranged in the perforating gun 1 and can also rotate in the direction of the axis of the charge carrier in the perforating gun 1. For example, the inner wall of the perforating gun 1 may be formed with a seat and the carrier 2 may be hinged at both ends to the bracket. In addition, the bullet frame 2 can be provided with bullet holes, and the bullet holes can correspond to the positions of the perforating bullets 3, so that the perforating bullets 3 can conveniently penetrate out of the bullet frame 2.
The charge 3, upon ignition, is able to form a jet, thereby perforating the casing 6 and forming a perforation. The charge 3 may be a large-aperture charge commonly used in the art and is not particularly limited. The perforating unit can contain a plurality of perforating charges 3 which are arranged along the axial direction of the charge carrier 2 at intervals, and the axes of the perforating charges 3 can form preset included angles with the axes of the charge carrier 2, so that the intersection points of the extension lines of the perforating charges 3 and the wall of the sleeve 6 are positioned on the same cross section, and fixed-plane perforating can be realized. It can be understood that the preset included angle between the axis of each perforating charge 3 and the axis of the charge carrier 2 can be the same or different, and the angle can be set according to the actual situation. The number of charges 3 may be 2, 3, etc.
The bullet frame 2 can also be formed with the balancing weight 4, and it can fix the internal surface at bullet frame 2, and fixed connection mode can have the multiple, for example spiro union, joint etc.. The shape and material of the weight block 4 may be various, for example, the cross section may be square, circular, or elliptical, the material may also be metal, and the material has a higher density. The balancing weight 4 is arranged on the charge frame 2, and due to the fact that the weight of the balancing weight is large, the center of the perforating unit can be changed, the charge frame 2 can be driven to rotate in the perforating gun 1, the balancing weight 4 can be located at the bottom of the horizontal well all the time, and at the moment, the perforating charges 3 can face towards the preset direction. The perforating charge 3 can be aimed at different preset directions by adjusting the position of the balancing weight 4, so that the oriented perforation is realized.
Further, the counterweight 4 extends along the radial direction of the bullet frame 2, and the size of the counterweight 4 along the radial direction is smaller than the radial size of the bullet frame 2. Thereby making the effect of the clump weight 4 in changing the center of gravity of the perforation unit more obvious.
Preferably, the quantity of balancing weight 4 is a plurality of, and a plurality of balancing weights 4 set up along the axis direction interval of bullet frame 2 for 2 rotation process of bullet frame, both ends receive balancing weight 4's pressure effect.
When the perforating device for the horizontal well is used for fixed-plane perforation and directional perforation, the perforating device for the horizontal well can be firstly put into a preset position of the casing 6, one or more perforating bullets 3 can be oriented towards a preset direction under the action of the balancing weight 4 to carry out directional perforation, then all the perforating bullets 3 in the perforating unit can be ejected towards the same cross section of the casing 6 to carry out fixed-plane perforation, so that the directional perforation and the fixed-plane perforation can be realized.
The perforating device for the horizontal well provided by the embodiment comprises a perforating gun and a perforating unit arranged in the perforating gun; the perforating unit comprises a charge frame and a plurality of perforating bullets arranged in the charge frame, the axis of the charge frame is superposed with the axis of the perforating gun, and the charge frame can be rotatably connected in the perforating gun around the axis direction of the charge frame; the inner surface of the bullet frame is also provided with a balancing weight; the multiple-shooting-hole bullet is respectively arranged along the axial direction of the bullet frame at intervals, the axis of each shooting-hole bullet and the axis of the bullet frame form a preset included angle, so that the intersection points of the extension lines of the axes of the multiple-shooting-hole bullets and the casing wall are distributed on the same cross section of the casing, fixed-plane perforation is realized, in addition, the position of the balancing weight can be adjusted, directional perforation towards the preset direction is realized, namely, the device can realize fixed-plane perforation, directional perforation can be realized, the perforating device does not need to be replaced, the operation is simple, and the efficiency is high.
Furthermore, as a preferable connection mode of the charge carrier 2 and the perforating gun 1, the charge carrier 2 comprises a body 21 and two connecting sections 22 arranged at two ends of the body 21, the perforating charges 3 and the clump weight 4 are arranged in the body 21, and the diameter size of the connecting sections 22 is smaller than that of the body 21; the connecting section 22 is externally sleeved with a bearing 23, and the outer surface of the bearing 23 is fixedly connected with the inner surface of the perforating gun 1; an end face of each connecting section 22 is provided with an end cap 24 for abutting against a side face of the bearing 23.
Specifically, the bullet rack 2 may include a body 21 and a connecting section 22 at two ends, a shoulder may be formed at the joint of the connecting end 22 and the body 21, an inner ring of the bearing 23 may be fixed on the connecting section 22, and an outer ring of the bearing 23 may be fixedly connected with an inner surface of the perforating gun 1. The bearing 23 connection reduces friction when the carrier 2 rotates, so that the perforating charges 3 can be accurately oriented in the preset direction.
The connecting section 22 is also formed with end caps 24 at both ends, and the end caps 24 can abut the bearing 23 against the shaft shoulder. The end cap 24 may be connected to the connecting section 22 in various ways, for example, the end cap 24 may be screwed on the connecting section 22, or a groove may be formed on the connecting section 22, and the end cap 24 may be formed with a protrusion that is in interference fit with the groove.
On the basis of the above embodiment, the perforating unit further comprises a connecting piece 5, wherein the connecting piece 5 comprises a connecting piece body 51, and a suspension part 53 and a connecting part 52 which are arranged on the connecting piece body 51, the connecting part 52 is used for being fixedly connected with the charge carrier 2, and the suspension part 53 is used for fixing the perforating charges 3.
Specifically, the perforating charges 3 may be suspended from the charge carrier 2 by a connecting member 5. The connector 5 may include a hanging portion 53 for hanging the perforating charge 3, and the hanging portion 53 may be a tubular structure with one end closed, and the perforating charge 3 may be prevented from being placed in the tubular structure. The connecting piece 5 may also have a connecting portion 52, and the connecting portion 52 may be fixed to the magazine 2. The connecting portion 52 may have various structures, such as a threaded through hole screwed to the cartridge holder 2, and a hook engaged with the cartridge holder 2. The perforating charge 3 is suspended by the connecting piece 5, so that the impact on the charge carrier 2 during perforating can be reduced.
Preferably, the cartridge holder 2 is formed with a mounting hole 25 and a through hole 26, the connecting portion 52 includes a catch 521 engaged with a hole wall of the mounting hole 25 and a threaded hole 522 coaxial with the through hole 26, and a screw is inserted through the through hole 26 and engaged with the threaded hole 522.
Specifically, the clip 521 may be formed with a slot matching with a hole wall of the mounting hole 25, and the mounting hole 25 is used for passing through the clip 521. During installation, the connecting piece 5 can be placed into the bullet frame 2, the buckle 521 penetrates through the mounting hole 25 and pushes the connecting piece 5 along the axis direction, the clamping groove is in contact with the hole wall, the through hole 26 is coaxial with the threaded hole 522 at the moment, and the bullet frame 2 can be screwed with the connecting piece 5 through a screw. The clamping and the screw joint are used for fixing the bullet frame 2, so that the fixing firmness can be improved.
Further, the hanging part 53 includes a first hanging piece 531 clamped on the connector body 51, the perforating bullet 3 is provided with an annular groove 31, and the first hanging piece 531 is provided with a first hole for clamping with the annular groove 31; the axis of the first hole and the axis of the bullet frame 2 form a preset included angle.
Specifically, the connector body 5 may include a slant surface having a predetermined angle with the axial direction of the magazine 2, and the first suspension 531 may have a plate-like structure, which may be vertically disposed on the slant surface. The first suspension 532 may have a first hole formed therein, the perforating charge 3 may have an annular groove 31 formed therein, and the first hole may be engaged with the annular groove 31, thereby achieving the purpose of fixing the perforating charge 3.
In addition, the connector body 51 may further have a first engaging groove formed thereon, the first engaging groove may extend in a direction perpendicular to the inclined plane, and the first suspension member 531 may be engaged in the first engaging groove.
Further, the hanging part 53 further includes a second hanging piece 532 caught on the connector body 51, the first hanging piece 531 and the second hanging piece 532 are arranged in parallel, and a second hole for accommodating the perforating charge 3 is formed on the second hanging piece 532.
Specifically, the second suspension member 532 may also be a plate-shaped structure, and a second catching groove may also be formed on the connector body 51, the second catching groove may extend in a direction perpendicular to the inclined plane, and the second suspension member 532 may also be clamped in the second catching groove. The second suspension 532 may be formed with a second hole, and the second hole may accommodate the perforating charge 3, thereby improving the fixing degree of the perforating charge 3 and ensuring that the ejection direction of the perforating charge 3 meets the requirement.
On the basis of the above embodiment, there are a plurality of perforating units, the plurality of perforating units are arranged at intervals along the axial direction of the perforating gun 1, and once ignition can simultaneously perforate in a plurality of sections or a plurality of preset directions, so that the efficiency is improved.
The embodiment also provides a horizontal well perforating system, which comprises a casing 6 and a horizontal well perforating device, wherein the casing 6 is sleeved outside the horizontal well perforating device.
Specifically, the casing 6 may be a casing structure commonly found in the prior art, and a horizontal well perforation device may be disposed inside the casing, and the structure and function of the horizontal well perforation device are the same as those of the above embodiments, and are not described again.
When the perforating device for the horizontal well is used for fixed-plane perforation and directional perforation, the perforating device for the horizontal well can be firstly put into a preset position of the casing 6, one or more perforating bullets 3 can be oriented towards a preset direction under the action of the balancing weight 4 to carry out directional perforation, then all the perforating bullets 3 in the perforating unit can be ejected towards the same cross section of the casing 6 to carry out fixed-plane perforation, so that the directional perforation and the fixed-plane perforation can be realized.
The perforating system for the horizontal well provided by the embodiment comprises a perforating gun and a perforating unit arranged in the perforating gun; the perforating unit comprises a charge frame and a plurality of perforating bullets arranged in the charge frame, the axis of the charge frame is superposed with the axis of the perforating gun, and the charge frame can be rotatably connected in the perforating gun around the axis direction of the charge frame; the inner surface of the bullet frame is also provided with a balancing weight; the multiple-shooting-hole bullet is respectively arranged along the axial direction of the bullet frame at intervals, the axis of each shooting-hole bullet and the axis of the bullet frame form a preset included angle, so that the intersection points of the extension lines of the axes of the multiple-shooting-hole bullets and the casing wall are distributed on the same cross section of the casing, fixed-plane perforation is realized, in addition, the position of the balancing weight can be adjusted, directional perforation towards the preset direction is realized, namely, the device can realize fixed-plane perforation, directional perforation can be realized, the perforating device does not need to be replaced, the operation is simple, and the efficiency is high.
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", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A perforating device for horizontal wells, comprising: the perforating gun comprises a perforating gun and a perforating unit arranged in the perforating gun;
the perforating unit comprises a charge carrier and a plurality of shot-hole charges arranged in the charge carrier, the axis of the charge carrier is superposed with the axis of the perforating gun, and the charge carrier can rotate around the axis direction of the charge carrier in the perforating gun; the inner surface of the bullet frame is also provided with a balancing weight;
the multiple-shot-hole bullets are respectively arranged along the axial direction of the bullet rack at intervals, and the axis of each shot of the perforating bullet and the axis of the bullet rack form a preset included angle, so that the intersection points of the extension lines of the axes of the multiple-shot-hole bullets and the wall of the casing are distributed on the same cross section of the casing.
2. The perforating device for the horizontal well as claimed in claim 1, wherein the charge carrier comprises a body and two connecting sections arranged at both ends of the body, the perforating charges and the clump weight are arranged in the body, and the diameter size of the connecting sections is smaller than that of the body; a bearing is sleeved outside the connecting section, and the outer surface of the bearing is fixedly connected with the inner surface of the perforating gun; and an end cover used for abutting against the side surface of the bearing is arranged on the end surface of each connecting section.
3. The horizontal well perforating device as claimed in claim 1, wherein the weight extends in a radial direction of the magazine, and a dimension of the weight in the radial direction is smaller than a radial dimension of the magazine.
4. The perforating device as claimed in claim 3, wherein the number of the weight members is plural, and the plural weight members are arranged at intervals along the axial direction of the magazine.
5. The perforating device for the horizontal well as recited in any of claims 1 to 4, wherein the perforating unit further comprises a connecting member, the connecting member comprises a connecting member body, and a suspending portion and a connecting portion which are arranged on the connecting member body, the connecting portion is used for being fixedly connected with the bullet carrier, and the suspending portion is used for fixing the perforating bullets.
6. Perforating device for horizontal wells as claimed in claim 5,
the bullet frame is last to be formed with mounting hole and through-hole, connecting portion include with the buckle of the pore wall looks block of mounting hole and with the coaxial screw hole of through-hole, the screw pass the through-hole with the screw hole cooperation.
7. The horizontal well perforating device as claimed in claim 5, wherein the suspending portion includes a first suspending member engaged with the connector body, and an annular groove is formed on the perforating bullet, and a first hole for engaging with the annular groove is formed on the first suspending member; the axis of the first hole and the axis of the bullet rack form the preset included angle.
8. The horizontal well perforating device as claimed in claim 7, wherein the suspending portion further comprises a second suspending member engaged with the connector body, the first suspending member and the second suspending member are arranged in parallel, and a second hole for accommodating the perforating charges is formed in the second suspending member.
9. The horizontal well perforating device as claimed in any of claims 1 to 4, wherein there are a plurality of said perforating units, and a plurality of said perforating units are arranged at intervals along an axial direction of said perforating gun.
10. A perforation system for a horizontal well, comprising: a casing and the horizontal well perforating device as claimed in any of claims 1 to 9, wherein the casing is sleeved outside the horizontal well perforating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020905960.3U CN212837726U (en) | 2020-05-26 | 2020-05-26 | Perforating device and system for horizontal well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020905960.3U CN212837726U (en) | 2020-05-26 | 2020-05-26 | Perforating device and system for horizontal well |
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| CN212837726U true CN212837726U (en) | 2021-03-30 |
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| CN202020905960.3U Active CN212837726U (en) | 2020-05-26 | 2020-05-26 | Perforating device and system for horizontal well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11732556B2 (en) | 2021-03-03 | 2023-08-22 | DynaEnergetics Europe GmbH | Orienting perforation gun assembly |
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2020
- 2020-05-26 CN CN202020905960.3U patent/CN212837726U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11732556B2 (en) | 2021-03-03 | 2023-08-22 | DynaEnergetics Europe GmbH | Orienting perforation gun assembly |
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