Directional perforating gun capable of automatically selecting angles

Abstract

The utility model relates to the technical field of petroleum and natural gas perforating equipment, and provides a directional perforating gun capable of automatically selecting angles to solve the problems that an existing directional perforating gun is complex in design, long in design period, unchangeable in targeted fixed direction and angle design, not universal with other designs and limited in use. Comprising a gun barrel and a directional bullet frame assembly, and a bullet frame pipe in the directional bullet frame assembly is rotationally installed in an inner cavity of the gun barrel through bearing assemblies at the two ends; balancing weights are installed at the two ends of the elastic frame pipe and between the bearing assemblies at the two ends. The balancing weight and the bullet frame pipe are separately designed and mounted, and mounting of the perforating bullet is not affected when the balancing weight is mounted. The balancing weight comprises a balancing weight seat which is provided with a plurality of positioning screw holes in different directions; the bullet rack pipe is provided with a plurality of bullet holes of the same type, the bullet rack pipe is connected with the counterweight seat through the positioning screws, the bullet holes can correspond to the positioning screw holes in different directions, the directional angle can be manually selected for installation during use, and use is convenient and flexible.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum and natural gas perforating equipment technical field, and concretely relates to a self -selected angle directional perforating gun. BACKGROUND

[0002] The perforating gun is perforating equipment in the perforating operation of petroleum and natural gas. Among them, the directional perforating gun is mainly applied to perforating in the inclined well and the horizontal well, and usually needs to be designed according to the specific performance of the oil well, so as to ensure that the perforating direction in the inclined well can be point blasting, better act on the main producing layer, and realize the maximization target of oil production capacity.

[0003] At present, most of the directional perforating guns used in the market utilize the self-weight directional principle, the eccentric weight and bearing in the perforating gun cartridge are increased, so that the center of gravity of the perforating gun is always on one side, the perforating bullet jet launch direction is arranged according to the perforating design requirement of the oil well, the detonating cord adopts the way of winding around the cartridge pipe to keep a reasonable gap with the gun barrel, and no matter how the perforating gun barrel rotates in the horizontal well, the perforating direction is always unchanged. Although this perforating gun directional method is simple to assemble and suitable for most directional perforating guns, various oil wells have appeared in the market at present, the well conditions develop towards diversification, the phase requirement of the directional perforating gun is more and more, and in order to more accurately perforate, various light-fiber directional perforating design requirements have appeared, which makes the design requirement of the conventional directional perforating gun higher and higher, the design precision requirement is also higher, the phase span between different perforating guns in a gun string is smaller and smaller, and even the phase span of 0°, 5°, 10°, etc. appears, which makes the design of the perforating gun more complex, and the design requirement period is too short. The conventional directional perforating gun is of fixed installation, and needs to be designed for the fixed direction and angle after the overall design of the oil well is determined every time. The targeted design cannot be changed, if the well condition requirement changes, the perforating gun needs to be designed and processed again according to the new requirement, which cannot meet the perforating design requirement of the special requirement and time urgency. Moreover, the design period is long, the design and processing are complex, and it cannot be used with other designs, which makes the use of the directional perforating gun limited.

[0004] Therefore, it is urgent to provide a directional perforating gun which can select the directional angle by itself and better meet the complex and various perforating design and use requirement. Utility model content

[0005] The utility model discloses a self -selected angle directional perforating gun can realize the directional angle of self -selection, thereby can better quickly satisfy the complex and varied perforating design and use demand's technical effect.

[0006] The utility model discloses a self -selected angle directional perforating gun can realize the directional angle of self -selection, thereby can better quickly satisfy the complex and varied perforating design and use demand's technical effect.

[0007] Preferably, the both ends bearing assembly includes bearing seat, and the both ends of the cartridge tube are provided with positioning installation holes, and the bearing seat is fixedly connected with the cartridge tube through the positioning installation holes.

[0008] Preferably, the counterweight block further includes a counterweight lead block, the counterweight ring is provided with a window, the counterweight lead block is contained in the window, and the counterweight lead block is detachably connected with the barrel.

[0009] Preferably, the counterweight lead block is contained in the inner bottom of the window.

[0010] Preferably, the both ends bearing assembly is respectively provided with an upper conductive plug and a lower conductive plug in the inner hole, the upper conductive plug is electrically connected with the switch, the switch is connected with the perforating bullet through a wire and connected with the lower conductive plug to form a loop.

[0011] Preferably, the barrel is provided with two spring sheets at the position close to the upper conductive plug.

[0012] Preferably, the both ends bearing assembly further includes a bearing sleeve, an angular contact ball bearing and an elastic retaining ring for shaft, the angular contact ball bearing is installed in the cavity formed by the bearing sleeve and the bearing seat, the elastic retaining ring for shaft is installed on the bearing seat to prevent retreat, and there is a gap between the bearing sleeve and the bearing seat, and the gap contains lubricating oil.

[0013] Preferably, a threaded protective cap is mounted on both ends of the barrel.

[0014] The technical scheme of the utility model has the beneficial effects that:

[0015] (1) By separating the counterweight and the cartridge tube, the position of the counterweight is fixed, and the installation of the counterweight does not affect the installation of the perforating bullet.

[0016] (2) By designing multiple different direction positioning screw holes in the counterweight seat, multiple direction positioning screw holes are designed in the part of the counterweight seat connecting the cartridge tube, even the smallest angle span of 5° required in the market can be met, and the design of the cartridge tube being separately installed, the bullet hole on the cartridge tube only needs to be processed in one type, by artificial selection, the cartridge tube and the corresponding angle positioning screw hole on the counterweight seat are installed together according to different direction requirements, and different angle perforating guns can be realized.

[0017] (3) Abandoning the existing conventional design, the two-end counterweight fixed design is adopted, the cartridge tube can also be fixedly designed, the overall counterweight direction can be selected by artificial assembly to adjust the perforating direction and angle, and the artificial complicated customized design and processing can be greatly reduced, the counterweight seat, cartridge tube and other accessories can be pre-processed for inventory, the directional perforating angle requirement can be matched and installed at any time, and the perforating gun direction can be changed according to the temporary requirements on the well site through adjustment assembly, and the use is more flexible and rapid. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a sectional view of the self-selected angle directional perforating gun in the utility model embodiment 1;

[0019] Figure 2 is Figure 1 is a structure schematic view of the A part in the utility model embodiment 1;

[0020] Figure 3 is Figure 1 is a structure schematic view of the B part in the utility model embodiment 1;

[0021] Figure 4 is a structure schematic view of the directional cartridge assembly in the utility model embodiment 1;

[0022] Figure 5 is a structure schematic view of the counterweight in the utility model embodiment 1.

[0023] Reference numerals: 1-Barrel, 2-Directional magazine assembly, 21-Magazine magazine tube, 21a-Bullet hole, 22-Bearing assembly at both ends, 221-Bearing seat, 222-Bearing outer sleeve, 223-Angular contact ball bearing, 224-Elastic retaining ring for shaft, 23-Counterweight, 231-Counterweight seat, 231a-Positioning screw hole, 232-Counterweight ring, 232a-Window, 233-Counterweight lead block, 24-Positioning screw, 3-Upper conductive plug, 4-Lower conductive plug, 5-Spring plate, 6-Threaded protective cap, 7-Rivet. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown herein can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] Example 1

[0028] like Figures 1 to 5 As shown, this embodiment provides a self-selecting angle directional perforation gun, including a barrel 1 and a directional magazine assembly 2. The directional magazine assembly 2 includes a magazine tube 21 and two-end bearing assemblies 22. The magazine tube 21 is rotatably mounted in the inner cavity of the barrel 1 via the two-end bearing assemblies 22. Counterweights 23 are installed between both ends of the magazine tube 21 and between the two-end bearing assemblies 22. The counterweights 23 are designed and installed separately from the magazine tube 21. The position of the counterweights 23 is fixed, eliminating the need to consider whether the installation of the counterweights 23 will affect the installation of the perforation ammunition, and the counterweights 23 do not need to be redesigned for perforation guns with different directions.

[0029] The counterweight 23 comprises a counterweight seat 231 provided with a plurality of positioning screw holes 231a in different directions, so that the requirement of the minimum angle span of 5 degrees on the market can be met; the cartridge tube 21 is provided with a plurality of cartridge holes 21a of the same type, the cartridge tube 21 is connected with the counterweight seat 231 through positioning screws 24, the cartridge hole 21a can correspond to the positioning screw hole 231a in different directions, the counterweight seat 231 can be fixedly installed in the barrel 1 through the positioning screws 24, and the cartridge hole 21a is used for installing a perforating bullet. In use, the directional angle can be selected by people, the cartridge tube 21 and the corresponding angle positioning screw hole 231a on the counterweight seat 231 are installed together according to different direction requirements, so that a perforating gun with different angles can be realized, and the complex and various perforating design and use requirements can be better and quickly met.

[0030] In the embodiment, the two-end bearing assembly 22 comprises a bearing seat 221, the two ends of the cartridge tube 21 are provided with positioning installation holes, and the bearing seat 221 is fixedly connected with the cartridge tube 21 through the positioning installation holes; the counterweight 23 further comprises a counterweight ring 232, one end of the counterweight ring 232 is screwed with the end of the counterweight seat 231 away from the cartridge tube 21 and abuts against the end of the cartridge tube 21, and the other end of the counterweight ring 232 is screwed with the bearing seat 221.

[0031] In the embodiment, the counterweight 23 further comprises a counterweight lead block 233, the counterweight lead block 233 is contained in a window 232a provided in the counterweight ring 232, and the counterweight lead block 233 is fixedly connected with the barrel 1 through the rivet 7.

[0032] In the embodiment, the counterweight lead block 233 is contained in the inner bottom of the window 232a. The window 232a located at the space above the counterweight lead block 233 can also be provided with a switch, a detonator and a detonating cord of a directional perforating gun detonating device, so that the switch, the detonator and the detonating cord do not need to be installed in the cartridge tube 21, the design is more unified, and the installation is more convenient.

[0033] In the embodiment, the inner holes of the two-end bearing assembly 22 are respectively provided with the upper electrically-conductive plug 3 and the lower electrically-conductive plug 4, the upper electrically-conductive plug 3 is electrically connected with the switch, the switch is connected with the perforating bullet through a wire and connected with the lower electrically-conductive plug 4 to form a loop.

[0034] In the embodiment, the two spring sheets 5 provided at the position of the barrel 1 close to the upper electrically-conductive plug 3 are used for grounding signals.

[0035] In the embodiment, the two-end bearing assembly 22 further comprises a bearing outer sleeve 222, an angular contact ball bearing 223 and an elastic shaft collar 224, the angular contact ball bearing 223 is installed in a cavity formed by the bearing outer sleeve 222 and the bearing seat 221, the elastic shaft collar 224 is installed on the bearing seat 221 to prevent retreat, and there is a gap between the bearing seat 221 and the bearing outer sleeve 222, and lubricating oil is contained in the gap.

[0036] In the embodiment, the threaded protective caps 6 are mounted on both ends of the directional gun barrel 1.

[0037] The self-angle selection directional perforating gun provided by the utility model can meet the requirement of the minimum angle span 5° on the market at present, and the bullet hole 21a on the bullet carrier pipe 21 only needs to be processed in one type, and the bullet carrier pipe 21 and the corresponding angle positioning screw hole 231a on the counterweight seat 231 are installed together according to different direction requirements, so that the perforating gun with different angles can be realized.

[0038] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A self-selectable angle directional perforating gun, characterized in that, It includes a gun barrel (1) and a directional magazine assembly (2). The directional magazine assembly (2) includes a magazine tube (21) and two-end bearing assemblies (22). The magazine tube (21) is rotatably mounted in the inner cavity of the gun barrel (1) through the two-end bearing assemblies (22). A counterweight (23) is installed between both ends of the cartridge tube (21) and the bearing assemblies (22) at both ends. The counterweight (23) includes a counterweight base (231). The counterweight base (231) has multiple positioning screw holes (231a) in different directions. The cartridge tube (21) has multiple bullet holes (21a) of the same type. The cartridge tube (21) and the counterweight base (231) are connected by positioning screws (24). The bullet holes (21a) can correspond to the positioning screw holes (231a) in different directions. The bullet holes (21a) are used to install perforating bullets.

2. The angle-selectable directional perforating gun according to claim 1, characterized in that, The bearing assembly (22) includes a bearing seat (221), and both ends of the spring frame tube (21) are provided with positioning and mounting holes. The bearing seat (221) is fixedly connected to the spring frame tube (21) through the positioning and mounting holes. The counterweight block (23) also includes a counterweight ring (232), one end of which is detachably connected to the end of the counterweight seat (231) away from the spring rack tube (21) and abuts against the end of the spring rack tube (21), and the other end of which is detachably connected to the bearing seat (221).

3. The angle-selectable directional perforating gun according to claim 2, characterized in that, The counterweight (23) also includes a lead counterweight (233), the counterweight ring (232) has a window (232a), the lead counterweight (233) is housed in the window (232a), and the lead counterweight (233) is detachably connected to the barrel (1).

4. The angle-selectable directional perforating gun according to claim 3, characterized in that, The counterweight lead block (233) is housed in the inner bottom of the window (232a), and a switch is installed inside the window (232a).

5. The angle-selectable directional perforating gun according to claim 4, characterized in that, The upper conductive plug (3) and the lower conductive plug (4) are respectively installed in the inner hole of the bearing assembly (22) at both ends. The upper conductive plug (3) is electrically connected to the switch. The switch is connected to the perforating spring through a wire and is connected to the lower conductive plug (4) to form a circuit.

6. The angle-selectable directional perforating gun according to claim 5, characterized in that, Two spring plates (5) are provided on the barrel (1) near the upper conductive plug (3).

7. The angle-selectable directional perforating gun according to claim 2, characterized in that, The bearing assembly (22) at both ends further includes a bearing outer sleeve (222), an angular contact ball bearing (223), and a shaft elastic retaining ring (224). The angular contact ball bearing (223) is installed in the cavity formed by the bearing outer sleeve (222) and the bearing housing (221). The shaft elastic retaining ring (224) is installed on the bearing housing (221) to prevent backlash. There is a gap between the bearing housing (221) and the bearing outer sleeve (222), and there is lubricating oil in the gap.

8. The angle-selectable directional perforating gun according to claim 1, characterized in that, Both ends of the barrel (1) are fitted with threaded protective caps (6).

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