Integrated perforating device for oil field downhole operation

Abstract

An integrated perforating device for oil field downhole operation comprises a gun body, a mounting hole is formed in the gun body, perforating bullets are arranged in the mounting hole, a fixing base is arranged at the front end of the gun body, the gun body is fixedly connected with the fixing base, a mounting base is arranged at the rear end of the gun body, and the gun body is rotationally connected with the mounting base. The utility model provides an integrated perforating device for oil field underground operation, which is compact in structure and high in integration degree, integrates driving and anchoring in a fixed seat, forms an integrated tool with a gun body, does not need a complicated underground linkage mechanism, is high in reliability, is convenient to convey through an oil pipe, and is convenient to use. Perforating operation can accurately target a sweet spot area or a high-permeability zone displayed by geological data, the problem of blindness of fixed-phase perforation is fundamentally solved, and a foundation is laid for high yield of oil and gas wells.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil and gas field development equipment, specifically relating to an integrated perforation device for oilfield downhole operations. Background Technology

[0002] In the exploration and development of oil and gas fields, perforation is a crucial step in well completion operations, and its effectiveness directly affects the production capacity of oil and gas wells. Perforation is performed by lowering a specialized perforation device (perforation gun) into the wellbore to a predetermined depth, using a shaped jet to penetrate the casing, cement sheath, and enter the formation, thereby establishing a flow channel between the oil and gas layer and the wellbore.

[0003] Currently, the perforation technologies widely used in oilfields are mainly divided into two categories: cable-driven perforation and tubing-driven perforation. Regardless of the method, the core component—the perforating gun—is usually a rigid structure. Once lowered into the well, the direction of the perforating projectile's trajectory (i.e., the perforation phase) is fixed. Common phases include 180°, 120°, and 90°, designed to cover different radial ranges. While this fixed-phase perforation technology is mature and reliable, its inherent technical shortcomings become increasingly apparent when facing complex geological conditions and heterogeneous oil and gas reservoirs.

[0004] First, the inability to precisely target the perforation makes it difficult to maximize production. Oil and gas reservoirs often exhibit anisotropy, with oil and gas enrichment areas potentially existing only in a specific direction of the formation or in fracture zones. Fixed-phase perforation projectiles can only be fired uniformly in all directions, failing to target these high-permeability zones or sweet spots. This results in some perforations potentially hitting infertile areas, producing primarily formation water rather than oil and gas, thus reducing oil and gas recovery and failing to achieve the ideal effect of "every perforation hitting the mark."

[0005] Secondly, it is impossible to effectively avoid complex downhole conditions, posing operational risks. In open-hole wells or wells with complex structures, there may be faults, easily collapsible weak formations, or adjacent water layers around the wellbore. Fixed-phase perforation operations are highly unpredictable, and the jet may directly impact these unfavorable areas, inducing sand production, wellbore collapse, or water-gas cross-flow, which not only affects production but also increases the risks and costs of well workover operations. Utility Model Content

[0006] This invention provides an integrated perforation device for oilfield downhole operations. It features a compact structure and high integration, integrating the drive and anchoring into a fixed base, forming a single tool with the gun body. This eliminates the need for complex downhole linkage mechanisms, ensuring high reliability and facilitating delivery via tubing. It enables perforation operations to precisely target "sweet spots" or high-permeability zones indicated by geological data, fundamentally solving the problem of blind perforation in fixed-phase perforation and laying the foundation for high oil and gas well production.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] An integrated perforation device for oilfield downhole operations includes a gun body with a mounting hole and a perforation projectile inside the mounting hole. A fixed seat is provided at the front end of the gun body, and the gun body is fixedly connected to the fixed seat. A mounting seat is provided at the rear end of the gun body, and the gun body is rotatably connected to the mounting seat.

[0009] The rear side of the fixed base is provided with a rearwardly positioned adjustment motor. The main shaft of the adjustment motor is coaxially fixedly connected to the front end of the gun body. An upper positioning motor and a lower positioning motor are provided in the middle position inside the fixed base. The main shaft of the upper positioning motor is set upward, and an upper positioning threaded tube is threadedly connected to the main shaft of the upper positioning motor. The main shaft of the lower positioning motor is set downward, and a lower positioning threaded tube is threadedly connected to the main shaft of the lower positioning motor. Both the upper positioning threaded tube and the lower positioning threaded tube are rectangular in shape.

[0010] The mounting base has a power supply inside and a protective shell at the front end.

[0011] The gun body is equipped with a gyroscope.

[0012] The regulating motor, the upper positioning motor, and the lower positioning motor are all forward and reverse reversible stepper motors.

[0013] The mounting base is equipped with a pressure sensor and a position sensor.

[0014] The protective shell is a solid protective shell with a metal structure.

[0015] The beneficial effects of this utility model using the above technical solution are as follows: The delivery pipe connecting the mounting base delivers the gun body to the designated position of the oil and gas well. The upper and lower positioning motors are controlled to rotate. The main shaft of the upper positioning motor rotates, pushing the upper positioning threaded tube out of the fixed seat, and the main shaft of the lower positioning motor rotates, pushing the lower positioning threaded tube out of the fixed seat. The upper and lower positioning threaded tubes are then pressed against the well wall, fixing the fixed seat. By adjusting the motor's operation, the rotation angle of the gun body can be adjusted, ensuring the perforation projectile is accurately oriented towards oil and gas enrichment areas, guaranteeing that the perforations made by the gun body are aimed at these high-permeability zones or sweet spots. After drilling is completed, the upper and lower positioning motors are controlled to retract the upper and lower positioning threaded tubes, and the delivery pipe pulls the gun body back, completing the perforation operation with adjustable design direction and angle. Compared with existing fixed-phase perforation technology, this achieves "every hole hits the mark," improving oil and gas recovery rates. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2This is a schematic diagram of the protruding upper positioning threaded tube and lower positioning threaded tube in this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the fixing base in this utility model;

[0019] Figure 4 for Figure 3 A cross-sectional structural diagram.

[0020] Gun body 1, mounting hole 2, fixing base 3, mounting base 4, adjusting motor 5, upper positioning motor 6, lower positioning motor 7, upper positioning threaded tube 8, lower positioning threaded tube 9, power supply 10, protective shell 11. Detailed Implementation

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] like Figure 1 - As shown in the figure, an integrated perforation device for oilfield downhole operations includes a gun body 1, a mounting hole 2 on the gun body 1, a perforation projectile inside the mounting hole 2, a fixed seat 3 at the front end of the gun body 1, the gun body 1 and the fixed seat 3 being fixedly connected, and a mounting seat 4 at the rear end of the gun body 1, the gun body 1 and the mounting seat 4 being rotatably connected.

[0024] The rear side of the fixed base 3 is provided with a rearwardly positioned adjustment motor 5. The main shaft of the adjustment motor 5 is coaxially fixedly connected to the front end of the gun body 1. The middle position inside the fixed base 3 is provided with an upper positioning motor 6 and a lower positioning motor 7. The main shaft of the upper positioning motor 6 is set upward, and an upper positioning threaded tube 8 is threadedly connected to the main shaft of the upper positioning motor 6. The main shaft of the lower positioning motor 7 is set downward, and a lower positioning threaded tube 9 is threadedly connected to the main shaft of the lower positioning motor 7. Both the upper positioning threaded tube 8 and the lower positioning threaded tube 9 are rectangular in shape.

[0025] The mounting base 3 has a power supply 10 inside and a protective shell 11 at its front end. The power supply 10 is a backup power supply, providing backup power to all electrical components inside the mounting base 3.

[0026] The gun body 1 is equipped with a gyroscope.

[0027] The adjusting motor 5, the upper positioning motor 6, and the lower positioning motor 7 are all forward and reverse reversing stepper motors.

[0028] The mounting base 3 is equipped with a pressure sensor and a position sensor.

[0029] The protective shell 11 is a solid protective shell with a metal structure. Example

[0030] The device is lowered to the predetermined perforation level via a delivery pipe; the upper positioning motor 6 and lower positioning motor 7 are activated, driving the upper positioning threaded tube 8 and lower positioning threaded tube 9 to extend from the upper and lower sides of the fixed seat 3 until they are firmly pressed against the well wall, anchoring the fixed seat 3 securely in the well; the surface control system issues commands based on geological guidance data such as gamma logging, adjusting motor 5 to start and precisely driving the gun body 1 to rotate to the optimal angle, with the built-in gyroscope feeding back real-time angle data to the control system to ensure angle accuracy; after angle adjustment, the perforation projectile is detonated, and the shaped jet is precisely aimed at the oil and gas enrichment area; after perforation is completed, the upper positioning motor 6 and lower positioning motor 7 reverse, retracting the upper positioning threaded tube 8 and lower positioning threaded tube 9, and the fixed seat 3 is released from anchoring; then the device is lifted to the next perforation section or returned to the surface via the delivery pipe for subsequent operations.

[0031] It achieves precise and intelligent control of perforation direction: by adjusting the coordination of motor 5 and gyroscope, the injection angle of the perforation projectile can be precisely adjusted to any required direction under ground command; this enables perforation operations to accurately target the "sweet spot" or high-permeability zone shown in geological data, fundamentally solving the problem of blindness in fixed-phase perforation and laying the foundation for high production of oil and gas wells.

[0032] Significantly improves oil and gas recovery rate and economic benefits: Since the perforation holes can be directly aimed at oil and gas enrichment areas, ineffective perforation and water resource production are avoided, realizing "every hole is drilled on the cutting edge", which can significantly improve single well production and final recovery rate, bringing huge economic benefits.

[0033] Enhanced operational safety and risk avoidance capabilities: In open-hole wells or complex formations, the device can actively adjust the perforation direction to effectively avoid adjacent water layers or easily collapsible weak formations, greatly reducing the risk of water channeling, formation sand production, and wellbore collapse, and improving the safety and success rate of well completion operations.

[0034] Compact structure and high degree of integration: The drive, anchoring, sensing and control system are highly integrated into the fixed base 3, forming an integral tool with the gun body 1. It does not require a complicated downhole linkage mechanism, has high reliability, is easy to transport through tubing, and is suitable for various well conditions.

[0035] The operation process is highly efficient: the entire process of anchoring, adjusting, perforating, and unlocking can be completed remotely from the ground without the need to pull out the drill string and change tools, which greatly improves the efficiency of perforation operations and saves valuable drilling platform operation time.

[0036] The components used in this invention, such as the motor, gyroscope, pressure sensor, and position sensor, are all existing conventional technologies, and their structural features will not be described in detail.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated perforating device for oilfield downhole operations, comprising a gun body, a mounting hole on the gun body, and a perforating projectile disposed within the mounting hole, characterized in that: The front end of the gun body is provided with a fixed seat, and the gun body is fixedly connected to the fixed seat. The rear end of the gun body is provided with a mounting seat, and the gun body is rotatably connected to the mounting seat. The rear side of the fixed base is provided with a rearwardly positioned adjustment motor. The main shaft of the adjustment motor is coaxially fixedly connected to the front end of the gun body. An upper positioning motor and a lower positioning motor are provided in the middle position inside the fixed base. The main shaft of the upper positioning motor is set upward, and an upper positioning threaded tube is threadedly connected to the main shaft of the upper positioning motor. The main shaft of the lower positioning motor is set downward, and a lower positioning threaded tube is threadedly connected to the main shaft of the lower positioning motor. Both the upper positioning threaded tube and the lower positioning threaded tube are rectangular in shape.

2. The integrated perforation device for oilfield downhole operations according to claim 1, characterized in that: The mounting base has a power supply inside and a protective shell at the front end.

3. The integrated perforation device for oilfield downhole operations according to claim 2, characterized in that: The gun body is equipped with a gyroscope.

4. The integrated perforation device for oilfield downhole operations according to claim 3, characterized in that: The regulating motor, the upper positioning motor, and the lower positioning motor are all forward and reverse reversible stepper motors.

5. The integrated perforation device for oilfield downhole operations according to claim 4, characterized in that: The mounting base is equipped with a pressure sensor and a position sensor.

6. The integrated perforation device for oilfield downhole operations according to claim 5, characterized in that: The protective shell is a solid protective shell with a metal structure.

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