Electromagnetic wave wireless control underground setting device

Abstract

An electromagnetic wave wireless control underground setting device is connected to the tail end of an oil pipe or a gas pipe and comprises a pipe body, an electric control unit, a mechanical unit and a pair of receiving antennas. The electric control unit is arranged in the pipe body. The mechanical unit is arranged at one end of the pipe body and comprises a pressurizing assembly which is located in the pipe body and electrically connected with the electric control unit, the pressurizing assembly is connected with a rubber sleeve located on the peripheral side of the pipe body, and the rubber sleeve is used for achieving casing pipe packing. The two receiving antennas are connected to the two ends of the pipe body respectively, electrically connected with the electric control unit and used for receiving electromagnetic wave signals sent by a ground host. The electromagnetic wave wireless control underground setting device is directly connected with an oil and gas pipeline, achieves remote control of sealing and unsealing through extremely low frequency electromagnetic wave transmission and ground instruction receiving, and is suitable for deep well or horizontal well operation.

Description

Technical Field

[0001] The utility model relates to the technical field of remote downhole sealing, in particular to an electromagnetic wave wirelessly controlled downhole sealing device. Background Art

[0002] Downhole sealing tools are devices used to seal pipelines during downhole operations to ensure the safety of the downhole environment and control the pressure in the well. They are usually made of metal and rubber and have high durability and sealing performance.

[0003] In oil and gas operations, underground oil and gas reservoirs are usually composed of multiple layers. In order to achieve the most efficient exploitation, it is necessary to isolate each stratum through a packer so that each part of the operation can be carried out independently to improve the operation efficiency. At the same time, during the operation, in order to control the downhole pressure and maintain the stability of the well structure, it is necessary to use a setting tool to seal the casing to prevent sudden pressure release or leakage, so as to ensure the safety and smooth progress of downhole operations.

[0004] The existing control methods of setting tools mainly include: pressure control, that is, ground pressure, controlling the setting tool to complete the sealing or releasing action; mechanical control, controlling the setting tool by inserting a sealing steel ball; cable control, using cables to achieve communication and control between the ground host and the setting tool, and remotely completing sealing and other operations. However, the existing methods are difficult to apply to deep well or horizontal well operations because they require ground pressure or cables and other wired methods. The sealing can only be released by lifting the pipe string, and flexible operations underground cannot be implemented. Utility Model Content

[0005] In view of the above-mentioned defects, the utility model provides an electromagnetic wave wireless controlled downhole sealing device, which is directly connected to the oil and gas pipeline, transmits and receives ground commands through extremely low frequency electromagnetic waves, realizes remote control sealing and unsealing, and is suitable for deep well or horizontal well operations.

[0006] In order to achieve the purpose of this utility model, the following technologies are proposed:

[0007] An electromagnetic wave wireless controlled downhole sealing device, connected to the end of an oil pipe or a gas pipe, comprises a pipe body and:

[0008] An electronic control unit is disposed in the tube body;

[0009] The mechanical unit is arranged at one end of the pipe body, and includes a pressurizing assembly located in the pipe body and electrically connected to the electronic control unit, the pressurizing assembly is connected to a rubber cylinder located on the outer peripheral side of the pipe body, and the rubber cylinder is used to achieve casing isolation;

[0010] A pair of receiving antennas are respectively connected to the two ends of the tube body, the receiving antennas are electrically connected to the electronic control unit, and the receiving antennas are used to receive electromagnetic wave signals emitted by the ground host, and the frequency of the electromagnetic wave signals is less than 1000 Hz.

[0011] Furthermore, the electronic control unit includes a single chip microcomputer, an isolation transformer, and a data acquisition circuit.

[0012] Furthermore, the isolation transformer includes a primary side and a secondary side, the secondary side is electrically connected to the acquisition circuit, the acquisition circuit includes a filter module, the acquisition circuit acquires the voltage across the secondary side of the isolation transformer, and filters the power frequency interference signal through the filter module.

[0013] Furthermore, the pressurizing component includes a hydraulic pump, a reversing valve, a hydraulic cylinder, and an oil tank to achieve control of the hydraulic pressure in the rubber cylinder.

[0014] Furthermore, the electromagnetic wave wireless controlled downhole sealing device also includes a pair of short sections respectively connected to the two ends of the pipe body.

[0015] Furthermore, two receiving antennas are respectively connected to one end of each short section.

[0016] Furthermore, the wire connected to the primary side of the isolation transformer passes through the short section and is electrically connected to the receiving antenna.

[0017] The beneficial effects of this technical solution are:

[0018] The electromagnetic wave wirelessly controlled downhole sealing device is directly connected to the oil and gas pipeline. It transmits and receives ground commands through extremely low frequency electromagnetic waves with a frequency of less than 1000Hz, realizes remote control of sealing and unsealing, and is suitable for deep well or horizontal well operations, solving the problem that remote and flexible operations cannot be carried out in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An overall cross-sectional view of an embodiment of the present application is shown.

[0020] Figure 2 A schematic diagram showing the working mode of an embodiment of the present application is shown. DETAILED DESCRIPTION

[0021] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0022] like Figure 1~Figure 2 The electromagnetic wave wireless controlled downhole sealing device shown is connected to the end of the oil pipe or gas pipe, and includes a pipe body 1, an electric control unit 2, a mechanical unit, a short section 6, and a receiving antenna 5.

[0023] The electronic control unit 2 is arranged in the tube body 1. The electronic control unit 2 includes a single-chip microcomputer, an isolation transformer, and a collection circuit. The isolation transformer includes a primary side and a secondary side. The secondary side is electrically connected to the collection circuit. The collection circuit includes a filter module. The collection circuit collects the voltage across the secondary side of the isolation transformer and filters the power frequency interference signal through the filter module.

[0024] The mechanical unit is arranged at one end of the tube body 1, and includes a pressurizing component 4 located in the tube body 1 and electrically connected to the electronic control unit 2. The pressurizing component 4 is connected to a rubber cartridge 3 located on the outer peripheral side of the tube body 1. The rubber cartridge 3 is used to achieve sealing of the casing 7. The pressurizing component 4 includes a hydraulic pump, a reversing valve, a hydraulic cylinder, and an oil tank to achieve control of the hydraulic pressure in the rubber cartridge 3.

[0025] The short sections 6 are a pair and are connected to two ends of the pipe body 1 respectively.

[0026] There is a pair of receiving antennas 5, which are respectively connected to one end of each short section 6. The receiving antenna 5 is electrically connected to the electronic control unit 2. Specifically, the wire connected to the primary side of the isolation transformer passes through the short section 6 and is electrically connected to the receiving antenna 5. The receiving antenna 5 is used to receive the electromagnetic wave signal emitted by the ground host, and the frequency of the electromagnetic wave signal is less than 1000 Hz.

[0027] Working method:

[0028] First, the electromagnetic wave wireless controlled downhole sealing device is connected to the oil and gas pipeline. In this embodiment, the device is connected to the 27 / 8-inch oil pipe and is used to seal in the 5 1 / 2-inch casing. After the connection is completed, the device is lowered into the specified position along the oil pipe, and the ground host emits electromagnetic waves.

[0029] After receiving the electromagnetic waves emitted by the ground host, the receiving antenna 5 converts them into electrical signals and connects to the isolation transformer. After the acquisition circuit acquires the isolation transformer voltage and outputs the analog signal, it amplifies, filters, and demodulates the analog signal into a digital signal and sends it to the single-chip microcomputer. After the single-chip microcomputer receives the digital signal and determines that the content of the digital signal is a closing or unsealing action, it sends a command to the pressurizing component 4. The pressurizing component 4 controls the increase or decrease of the hydraulic pressure in the rubber cylinder 3 to achieve the closing and unsealing of the casing 7.

[0030] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electromagnetic wave wireless controlled downhole sealing device, characterized in that: Connected to the end of the oil pipe or gas pipe, it includes a pipe body (1), and: An electronic control unit (2) is arranged in the tube body (1); The mechanical unit is arranged at one end of the tube body (1), and comprises a pressurizing component (4) located in the tube body (1) and electrically connected to the electronic control unit (2), the pressurizing component (4) being connected to a rubber cylinder (3) located on the outer peripheral side of the tube body (1), the rubber cylinder (3) being used to achieve the sealing of the casing (7); A pair of receiving antennas (5) are respectively connected to two ends of the tube body (1); the receiving antennas (5) are electrically connected to the electric control unit (2); the receiving antennas (5) are used to receive electromagnetic wave signals emitted by a ground host; the frequency of the electromagnetic wave signals is less than 1000 Hz.

2. The electromagnetic wave wireless controlled downhole sealing device according to claim 1 is characterized in that: The electronic control unit (2) comprises a single chip microcomputer, an isolation transformer and a data acquisition circuit.

3. The electromagnetic wave wireless controlled downhole sealing device according to claim 2 is characterized in that: The isolation transformer includes a primary side and a secondary side. The secondary side is electrically connected to a collection circuit. The collection circuit includes a filter module. The collection circuit collects the voltage across the secondary side of the isolation transformer and filters the power frequency interference signal through the filter module.

4. The electromagnetic wave wireless controlled downhole sealing device according to claim 1, characterized in that: The pressurizing component (4) comprises a hydraulic pump, a reversing valve, a hydraulic cylinder, and an oil tank, so as to realize the control of the hydraulic pressure in the rubber cartridge (3).

5. The electromagnetic wave wireless controlled downhole sealing device according to claim 3 is characterized in that: It also includes a pair of short sections (6) respectively connected to the two ends of the tube body (1).

6. The electromagnetic wave wireless controlled downhole sealing device according to claim 5 is characterized in that: The two receiving antennas (5) are respectively connected to one end of each short section (6).

7. The electromagnetic wave wireless controlled downhole sealing device according to claim 5 is characterized in that: The wire connected to the primary side of the isolation transformer passes through the short section (6) and is electrically connected to the receiving antenna (5).

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