Directional perforating adjustable gun tail mechanism and perforating gun

Abstract

The utility model provides a kind of directional perforating adjustable gun tail mechanism and perforating gun, belong to oil, water well perforating technical field.The existing technology is positioned in the old oil, water well casing in directional same hole secondary perforating, secondary perforating hole and original hole position are not accurate, prone to mispositioning misfire damage casing problem.It includes upper joint, pull-out baffle ring, guide cone, guide cone, angle scale and 0 scale, the taper hole cooperation connection of guide cone upper end and upper joint lower end, the guide cone is installed in guide cone, the upper end of guide cone and upper joint lower end center position screw connection, the pull-out baffle ring is connected with the upper end of guide cone, the pull-out baffle ring is located in the gap between upper joint and guide cone, the angle scale is engraved on the outer circumference of upper joint lower end, the 0 scale is engraved on the outer circumference of guide cone upper end.It is mainly used for oil, water well secondary perforating.

Description

Technical Field

[0001] This utility model belongs to the field of oil and water well perforation technology, and in particular relates to an adjustable gun tail mechanism for directional perforation and a perforation gun. Background Technology

[0002] For many years, the casing channels of old oil and water wells have become short, with small orifices and contamination due to the performance of perforating cartridges and perforation technology, making oil and water production difficult. Current methods such as hot washing, acid washing, and pneumatic perforation are used to solve the problem of contamination and blockage, but the effect is not significant and the wells are also contaminated. For old oil and water wells, the technology of secondary perforation in the same hole is used. High-performance perforating cartridges are used to perform precise secondary perforation on the original hole, which enlarges the orifice and lengthens the hole, reducing the extraction resistance. However, when performing azimuth-based secondary perforation on the casing of old oil and water wells, the positioning of the secondary perforation channel is not accurate with the original hole position, which can easily lead to misalignment and damage to the casing. Utility Model Content

[0003] In view of this, the present invention aims to propose an adjustable directional perforation gun tail mechanism and a perforation gun to solve the problem that in the existing technology, when performing secondary perforation with fixed orientation and the same hole in old oil and water well casings, the positioning of the secondary perforation channel and the original hole position is not accurate, which can easily lead to misalignment and accidental perforation and damage to the casing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable firing port mechanism includes an upper connector, a pull-out retaining ring, a guide cone, a guide cone, angle markings, and a 0-position marking. The upper end of the guide cone is connected to a tapered hole at the lower end of the upper connector. The guide cone is installed inside the guide cone body, and the upper end of the guide cone is threaded to the center position of the lower end of the upper connector. The pull-out retaining ring is threaded to the upper end of the guide cone and is located in the gap between the upper connector and the guide cone. The angle markings are engraved on the outer circumference of the lower end of the upper connector, and the 0-position marking is engraved on the outer circumference of the upper end of the guide cone.

[0005] Furthermore, a directional pin is provided in the upper side hole of the upper connector.

[0006] Furthermore, an opening and closing sliding sleeve is installed in the outer groove of the middle part of the upper connector.

[0007] A perforating gun, including a directional perforating adjustable breech mechanism.

[0008] Furthermore, the adjustable gun tail mechanism is connected to the lower end of the perforating gun.

[0009] Furthermore, the lower end of the perforating gun is threadedly connected to the upper end of the upper connector.

[0010] Furthermore, the guide cone has a directional groove on its side, which is connected to the support anchoring azimuth key. The support anchoring azimuth key is set on the support anchor, which is lowered into the casing and anchored at the designed well depth.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model ensures that the perforation position of the perforating gun can be precisely adjusted and locked, thereby achieving accurate alignment with the original hole position.

[0012] 2. This utility model increases the friction of the contact surface by matching the guide cone with the inclined surface of the tapered hole at the lower end of the upper connector, so that the guide cone can effectively prevent rotation after being fixed, thus ensuring the stability of the direction. Attached Figure Description

[0013] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the structure of the adjustable directional firing port mechanism of this utility model. Figure 1 ; Figure 2 This is a cross-sectional view of an adjustable directional firing port gun tail mechanism according to the present invention. Figure 3 This is a schematic diagram of the lower end of the perforating gun described in this utility model; Figure 4 This is a schematic diagram of the structure of the adjustable directional firing port mechanism of this utility model. Figure 2 ; Figure 5 This is a schematic diagram of the support anchor described in this utility model.

[0014] In the picture: 1-Upper connector, 2-Directional pin, 3-Opening and closing sliding sleeve, 4-Pull-out retaining ring, 5-Guide cone, 6-Guide cone, 7-Angle marking, 8-0 position marking, 9-Lower end of perforating gun, 10-Adjustable gun tail mechanism, 11-Support anchor, 12-Support anchor positioning key. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0016] Detailed Implementation Method 1: See Figure 1-5 This embodiment describes an adjustable directional firing port mechanism, comprising an upper connector 1, a pull-out retaining ring 4, a guide cone 5, a guide cone 6, an angle marking 7, and a 0-position marking 8. The upper end of the guide cone 5 is connected to a tapered hole at the lower end of the upper connector 1. The guide cone 6 is installed inside the guide cone 5, and its upper end is threadedly connected to the center position of the lower end of the upper connector 1. The pull-out retaining ring 4 is threadedly connected to the upper end of the guide cone 6 and is located in the gap between the upper connector 1 and the guide cone 5. The angle marking 7 is engraved on the outer circumference of the lower end of the upper connector 1, and the 0-position marking 8 is engraved on the outer circumference of the upper end of the guide cone 5.

[0017] When the perforation azimuth angle needs to be adjusted, the guide cone 6 is rotated in the reverse direction. Since there is a certain space between the tapered hole of the upper connector 1 and the upper end of the guide cone 5, the upper cone of the guide cone 5 is pulled upward by pulling out the retaining ring 4. After rotating the guide cone 5 to the required angle, the guide cone 6 is rotated in the forward direction to press the upper cone of the guide cone 5 into the tapered hole of the upper connector 1 by pulling out the retaining ring 4. Rotating the guide cone 5 realizes that the zero position mark 8 rotates to the angle corresponding to the angle mark 7, so that the perforation azimuth can be precisely adjusted and locked, thereby achieving precise alignment with the original hole position.

[0018] In this embodiment, a directional pin 2 is provided in the upper side hole of the upper connector 1, and the installation position of the directional pin 2 is the "0 degree" reference point of the entire angle measurement system. In this embodiment, an opening and closing sliding sleeve 3 is installed in the outer groove of the middle part of the upper connector 1. Detailed Implementation Method 2: See Figure 1-5 This embodiment describes a perforating gun, including a directional perforating adjustable gun tail mechanism 10. The adjustable gun tail mechanism 10 is connected to the lower end 9 of the perforating gun. The lower end 9 of the perforating gun is threadedly connected to the upper end of the upper connector 1. The guide cone 6 has a directional groove on its side. The directional groove is connected to a support anchoring azimuth key 12. The support anchoring azimuth key 12 is disposed on a support anchor 11. The support anchor 11 is lowered into the casing and anchored at the designed well depth.

[0019] The support anchor 11 is lowered into the casing and anchored at the designed well depth. The logging instrument is lowered into the well and placed on the upper end of the support anchor 11. The azimuth angle of the support anchor azimuth key 12, the anchoring depth of the support anchor 11, and the first reference hole position of the casing are measured, determined, and recorded. Based on the relevant data recorded by the logging instrument, the adjustable gun tail mechanism 10 is corrected in azimuth angle and adjusted in depth to ensure that the first reference hole of the perforating gun is aligned with the reference hole determined by the casing. The adjustable gun tail mechanism 10 is connected to the lower end 9 of the perforating gun. The adjustable gun tail mechanism 10 is lowered into the well and automatically placed in the upper end hole of the support anchor 11 by the guide slope. The support anchor azimuth key 4 is inserted into the directional groove on the side of the adjustable gun tail 1 for orientation. Then, the secondary perforation operation is performed.

[0020] The specific embodiments of this utility model disclosed above are merely illustrative of the present utility model. These specific embodiments do not exhaustively describe all details, nor do they limit the utility model to only the described embodiments. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.

Claims

1. A directional firing port adjustable breech mechanism, characterized in that: It includes an upper connector (1), a pull-out retaining ring (4), a guide cone (5), a guide cone (6), an angle marking (7), and a 0-position marking (8). The upper end of the guide cone (5) is connected to the tapered hole at the lower end of the upper connector (1). The guide cone (6) is installed inside the guide cone (5). The upper end of the guide cone (6) is threaded to the center position at the lower end of the upper connector (1). The pull-out retaining ring (4) is threaded to the upper end of the guide cone (6). The pull-out retaining ring (4) is located in the gap between the upper connector (1) and the guide cone (5). The angle marking (7) is engraved on the outer circumference at the lower end of the upper connector (1). The 0-position marking (8) is engraved on the outer circumference at the upper end of the guide cone (5).

2. The adjustable breech mechanism for directional firing ports according to claim 1, characterized in that: The upper end side hole of the upper connector (1) is provided with a directional pin (2).

3. The adjustable breech mechanism for directional firing ports according to claim 1, characterized in that: The upper connector (1) has an opening and closing sliding sleeve (3) installed in the outer groove in the middle.

4. A perforating gun, characterized in that: Includes the directional firing port adjustable gun tail mechanism (10) as described in any one of claims 1-3.

5. A perforating gun according to claim 4, characterized in that: The adjustable gun tail mechanism (10) is connected to the lower end (9) of the perforating gun.

6. A perforating gun according to claim 5, characterized in that: The lower end (9) of the perforating gun is threadedly connected to the upper end of the upper connector (1).

7. A perforating gun according to claim 4, characterized in that: The guide cone (6) has a directional groove on its side. The directional groove is connected to the support anchoring azimuth key (12). The support anchoring azimuth key (12) is set on the support anchor (11). The support anchor (11) is lowered into the casing and anchored at the designed well depth.

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