Drilling system drill pipe phase grounding detection device, system and method

Abstract

The present invention provides a drilling system drill pipe phase grounding detection device, system, and method. The drilling system drill pipe phase grounding detection device includes: a detection module, a power supply module; the detection module includes: a detection probe, an optical coupler; the detection probe is connected to the drill pipe phase grounding to be detected, and an input end of the optical coupler is connected to the detection probe via a cable; the power supply module applies a DC signal to the drill pipe phase grounding point to be detected, the detection probe receives the DC signal and transmits the DC signal to the optical coupler via a cable, and controls the optical coupler to turn on or off according to the DC signal to generate a drill pipe phase grounding detection signal. The present invention can be used in a power environment with long-term single-phase grounding, solving the problem that conventional grounding protection devices cannot be applied to long-term single-phase grounding systems such as electric drilling systems.

Description

Technical Field

[0001] The present invention relates to a grounding protection technology for drilling equipment, in particular to a grounding safety protection technology for oil drilling or unconventional electricity use, and more particularly to a drilling system drill pipe phase grounding detection device, system and method. Background Art

[0002] Currently, ground detection and protection devices for oil drilling and conventional electricity use are all designed as leakage protection devices for systems with ungrounded central points. These devices typically detect insulation failure in a phase line and initiate protection by disconnecting the output of the protected equipment, thereby preventing electric shock and equipment damage.

[0003] The electric drill system is a novel drilling technology that utilizes a unique three-phase power supply consisting of a two-phase cable and a single-phase drill pipe. This power supply utilizes the standard drill pipe as the single-phase power transmission medium, posing a significant risk of electric shock to the drilling rig and personnel who come into contact with it. To ensure the safety of personnel and equipment during system operation, the electric drill system grounds the drill pipe phase at the inverter output, ensuring that the drilling rig and drill pipe are at the same potential as the earth, thus ensuring personnel safety. Therefore, ensuring the grounding of the drill pipe phase is crucial. However, existing grounding detection devices are not applicable in this environment. A detection device that can detect the long-term grounding of the drill pipe phase in real time is needed. Summary of the Invention

[0004] In order to solve the problem of electric drilling tool drilling system requiring real-time detection of long-term drill pipe phase grounding, the present invention provides a drilling system drill pipe phase grounding detection device, the drilling system drill pipe phase grounding detection device comprising: a detection module, a power module; the detection module comprising: a detection probe, an optical coupler;

[0005] The detection probe is connected to the drill phase rod to be detected, and one input end of the optocoupler is connected to the detection probe through a cable; the power supply module applies a DC signal to the drill phase grounding point to be detected, and the detection probe receives the DC signal and transmits the DC signal to the optocoupler through a cable, and controls the optocoupler to be turned on or off according to the DC signal to generate a drill phase grounding detection signal.

[0006] In an embodiment of the present invention, an output terminal of the optical coupler is connected to a power supply via a resistor, and the potential of the output terminal is controlled according to the on / off state of the optical coupler to generate a drill pipe phase grounding detection signal.

[0007] In an embodiment of the present invention, one output end of the optocoupler is connected to the other output end of the optocoupler via a capacitor, and the other output end of the optocoupler is grounded.

[0008] In an embodiment of the present invention, the detection module further includes: a first resistor;

[0009] An input end of the optical coupler is connected to a cable through the first resistor so as to be connected to a detection probe.

[0010] In an embodiment of the present invention, the detection module further includes: a fourth resistor, and the other input end of the optocoupler is grounded through the fourth resistor.

[0011] In an embodiment of the present invention, the output terminal and the input terminal of the power module are grounded via a capacitor respectively.

[0012] At the same time, the present invention also provides a drilling system drill pipe phase grounding protection system, comprising: a drilling system drill pipe phase grounding detection device and a relay; the drilling system drill pipe phase grounding detection device is connected to the power distribution cabinet and frequency converter of the drilling system through the relay; wherein,

[0013] The drilling system drill pipe phase grounding detection device includes: a detection module, a power supply module; the detection module includes: a detection probe, an optical coupler;

[0014] The detection probe is connected to the drill pipe phase to be detected, and an input end of the optical coupler is connected to the detection probe via a cable; the power supply module applies a DC signal to the drill pipe phase grounding point to be detected, and the detection probe receives the DC signal and transmits the DC signal to the optical coupler via a cable, and controls the optical coupler to be turned on or off according to the DC signal to generate a drill pipe phase grounding detection signal;

[0015] The relay controls the power distribution cabinet and the emergency stop switch of the frequency converter of the electric drilling system according to the detection signal.

[0016] At the same time, the present invention also provides a drilling system drill pipe phase grounding detection method, which uses the above-mentioned drilling system drill pipe phase grounding detection device to perform grounding detection on the drilling system drill pipe.

[0017] At the same time, the present invention also provides a drilling system drill pipe phase grounding protection method, which uses the aforementioned drilling system drill pipe phase grounding protection system to control the drilling system's power distribution cabinet and inverter switches to achieve grounding protection for the drilling system's drill phase rods.

[0018] The drill pipe phase grounding detection device of the present invention can be used in environments with long-term single-phase grounding, resolving the problem that conventional grounding protection devices cannot be applied to long-term single-phase grounding systems such as electric drilling systems. This grounding detection device effectively addresses the electrical safety issues of electric drilling systems, laying a solid foundation for the widespread application of this technology.

[0019] In order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a block diagram of the drill pipe grounding detection device for a drilling system according to the present invention;

[0022] Figure 2 Schematic diagram of a drill pipe grounding protection system for a drilling system according to an embodiment of the present invention;

[0023] Figure 3 is a block diagram of the ground detection safety protection device disclosed in this embodiment;

[0024] Figure 4 Schematic diagram of a ground detection device according to the present embodiment;

[0025] Figure 5 2 is a schematic diagram of a grounding detection device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The present invention provides a drilling system drill pipe phase grounding detection device, such as Figure 1 As shown, the drilling system drill pipe phase grounding detection device disclosed in the present invention includes: a detection module 10, a power supply module 20; the detection module 10 includes: a detection probe 101, an optical coupler 102;

[0028] The detection probe 101 is connected to the drill phase rod to be detected, and one input end of the optocoupler 102 is connected to the detection probe through a cable; the power module applies a DC signal to the drill phase grounding point to be detected, and the detection probe receives the DC signal and transmits the DC signal to the optocoupler through a cable, and controls the optocoupler to be turned on or off according to the DC signal to generate a drill phase grounding detection signal.

[0029] The drilling system drill pipe phase grounding detection device of the present invention applies a DC power signal through a power supply module, that is, a DC power supply is applied to the drill pipe phase grounding point to be detected (the grounding point of one phase of electricity connected to the drill pipe) to obtain a DC signal, and the obtained DC signal is transmitted to the optocoupler of the detection module. The DC signal controls the conduction or shutdown of the optocoupler element, thereby controlling the potential of the optocoupler output end, and the potential signal of the optocoupler output end is used as the drill pipe phase grounding detection signal.

[0030] At the same time, the present invention also provides a drilling system drill pipe phase grounding protection system, such as Figure 2 As shown, the drilling system drill pipe phase grounding protection system of the present invention includes: a drilling system drill pipe phase grounding detection device 201 and a relay 202; the drilling system drill pipe phase grounding detection device 201 is connected to the power distribution cabinet and the frequency converter of the drilling system through the relay 202;

[0031] The drilling system drill pipe phase grounding detection device includes: a detection module, a power supply module; the detection module includes: a detection probe, an optical coupler;

[0032] The detection probe is connected to the drill pipe phase to be detected, and an input end of the optical coupler is connected to the detection probe via a cable; the power supply module applies a DC signal to the drill pipe phase grounding point to be detected, and the detection probe receives the DC signal and transmits the DC signal to the optical coupler via a cable, and controls the optical coupler to be turned on or off according to the DC signal to generate a drill pipe phase grounding detection signal;

[0033] The relay controls the power distribution cabinet and the emergency stop switch of the frequency converter of the electric drilling system according to the detection signal.

[0034] The technical solution of the present invention is further described in detail below with reference to specific embodiments.

[0035] In order to solve the problem that the electric drilling system needs to detect the long-term grounding of the drill pipe in real time, the embodiment of the present invention provides a grounding detection safety protection device, such as Figure 3 , which is a block diagram of the grounding detection safety protection device disclosed in this embodiment, includes: a grounding detection component 301 , a safety control component 302 , a protection execution component 303 and a DC power supply 304 .

[0036] In this embodiment, the ground detection component 30 includes a high-voltage detection probe and cable, primarily used to transmit a feedback DC signal in real time to the safety control component control circuit board. The ground detection component 301 is connected to the drill pipe output of the inverter of the drilling system being tested via the high-voltage detection probe and cable.

[0037] The safety control component 302 includes: a control circuit board and an output relay group; the control circuit board performs logic processing on the DC signal transmitted from the ground detection component and outputs a control signal to control the relay group.

[0038] The protection execution component 303 includes an execution component and an alarm component, and is mainly used to directly control the controlled equipment with the control signal output by the security protection system, thereby achieving safety protection for the equipment and personnel.

[0039] The ground detection component 301 is connected to the safety control component 302 , the safety control component 302 is connected to the protection execution component 303 ; and the protection execution component 303 is connected to the controlled device.

[0040] The safety control component injects a signal into the ground via DC power supply 304, which is then fed back to the control circuit board in real time via the ground detection component. When grounding is normal, the control board indicator remains on, and the safety control component remains inactive. If the grounded phase cable fails and the control circuit board of the safety control component loses the DC signal, the safety control component performs a logical operation to output a signal to the output relay group, which then activates the protection actuator component, thereby achieving system protection.

[0041] In one embodiment of the present invention, grounding conditions can also be monitored using an external DC power supply. Specifically, the grounding status of the drill phase rod being tested can be checked using an external DC power supply, and real-time feedback is provided to the control circuit board via the grounding detection component. When grounding is normal, the control board indicator light remains on, and the safety control component does not operate. If the grounded phase cable fails to ground and the control circuit board of the safety control component loses the DC signal, the safety control component outputs a signal to the output relay group through logical operation, which then drives the protection execution component to operate, thereby achieving system protection.

[0042] Optionally, in one embodiment of the present invention, the safety control component uses an optical coupling element to isolate the detection and output control circuits.

[0043] like Figure 4 The figure shows a schematic diagram of a ground detection device according to an embodiment of the present invention performing a test on a drill pipe in a drilling system. The figure shows a ground detection device 401 connected to the drill pipe phase cable in the three-phase power output of a frequency converter via a high-voltage detection probe and cable. The ground detection device comprises a ground detection component, a safety control system, and a protection execution component.

[0044] The grounding detection component includes a high-voltage detection probe and a cable; the safety control system includes a control circuit board and an output relay group; and the protection execution component includes an execution component and an alarm component.

[0045] The grounding detection component is connected to the inverter output drill pipe through a high-voltage detection probe and a cable. The grounding detection component is connected to the safety control system, which is connected to the protection execution component; and the protection execution component is connected to the controlled device.

[0046] The grounding detection component transmits the DC signal to the safety control system in real time through the high-voltage detection probe and cable;

[0047] The safety control system monitors the DC signal fed back in real time and outputs the safety control system signal to the protection execution component;

[0048] The protection execution component outputs the control signal and the alarm signal to the controlled device. Figure 4 In the illustrated embodiment, the controlled devices include: a power distribution cabinet and a frequency converter cabinet.

[0049] In this embodiment, the electric drill system uses a unique power supply method, a two-phase cable plus a single-phase drill pipe, to power the downhole motor. Although the system design provides grounding protection for the drill pipe phase cables from the inverter output, all equipment connected to the drill pipe, including the drilling rig and personnel and equipment on the platform, poses a risk of electric shock, seriously impacting the safe operation and widespread adoption of the electric drill system. The grounding detection device of this invention is specifically designed for systems such as electric drill systems that require reliable, long-term single-phase grounding. Conventional grounding detection devices in the prior art are ineffective.

[0050] like Figure 5 Figure 2 shows a schematic diagram of the ground detection device according to one embodiment of the present invention. In this embodiment, the safety control system outputs a DC signal that is transmitted to the ground detection component via the earth and the system grounding line. This DC signal is fed back to the safety control system control circuit board in real time via a high-voltage detection probe and cable. In this embodiment, a power module B0505S-2W provides DC power, with the module's output terminal (+E0) connected to the ground terminal of the drill pipe phase being tested.

[0051] In one embodiment of the present invention, the power module is the power supply for the detection circuit. The power is transmitted to the ground through the ground wire and then returns to the control board through the drill pipe phase ground wire. When the ground line is normal, the optocoupler element is turned on, otherwise the optocoupler element is not turned on.

[0052] exist Figure 5In the schematic diagram of the grounding detection device shown, resistors R404 and R401 are current-limiting resistors, which limit the current in the safety detection circuit and work when the system is normally grounded; R407 is connected in parallel at both ends of the optocoupler, providing an instantaneous reverse discharge path for the optocoupler to prevent reverse breakdown of the optocoupler; diode D401 provides a current discharge path in the event of a fault and blocks the current path of resistor R402 under normal operating conditions; capacitors C402 and C403 are decoupling capacitors of the power supply to prevent levels E1 and E0 from being interfered with by high frequency; the power chip B05055 is an isolation chip, which isolates the grounding points DND1 and GND0 to prevent high voltage crosstalk to the E1 level and burn the control circuit. GND is the earth grounding point and provides a loop for the safety protection circuit; the resistor R403 at the output end of the optocoupler is a pull-up resistor, and the capacitor C401 is a decoupling capacitor, which enhances the anti-interference ability of the optocoupler output signal.

[0053] As shown in Figure 5, when the drill pipe phase is grounded normally, the DC signal flows through the SAFE1 point through the grounding detection component and is transmitted to the optical coupling element U401 through the resistor R401. The optical coupling element U401 is turned on, thereby lowering the potential of the output point OUT1 and triggering the output relay group (the relay group is not marked in the figure) to have no action.

[0054] When the drill pipe phase is abnormally grounded, the DC signal cannot be fed back to the safety control system control circuit board, the optical coupling element U401 is turned off, the output point OUT1 is high potential, and the output relay group operates to control the safety protection execution component to interrupt the power output, and on the other hand, output an alarm signal to stop the output of the inverter, etc.

[0055] The present invention designs a grounding detection device for real-time detection of the long-term grounding condition of the drill pipe phase. Once the drill pipe phase grounding fails or is poor, the inverter output is immediately disconnected to protect the safety of drilling rig personnel and equipment.

[0056] At the same time, the present invention also provides a drilling system drill pipe phase grounding detection method, which uses the above-mentioned drilling system drill pipe phase grounding detection device to perform grounding detection on the drilling system drill pipe.

[0057] At the same time, the present invention also provides a drilling system drill pipe phase grounding protection method, which uses the aforementioned drilling system drill pipe phase grounding protection system to control the drilling system's power distribution cabinet and inverter switches to achieve grounding protection for the drilling system's drill phase rods.

[0058] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0059] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0060] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0061] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0062] Specific embodiments are used in the present invention to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A drilling system drill pipe phase grounding detection device, characterized in that: The drilling system drill pipe phase grounding detection device includes: a detection module, a power supply module; the detection module includes: a detection probe, an optical coupler; The detection probe is connected to the drill pipe to be detected, and an input end of the optical coupler is connected to the detection probe via a cable; the power supply module applies a DC signal to the drill pipe phase grounding point to be detected, and the detection probe receives the DC signal and transmits the DC signal to the optical coupler via a cable, and controls the optical coupler to be turned on or off according to the DC signal to generate a drill pipe phase grounding detection signal; The output terminal and the input terminal of the power module are grounded via a capacitor respectively; The power module is an isolation chip used to isolate the earth grounding point and the drill pipe phase grounding point.

2. The drilling system drill pipe phase grounding detection device according to claim 1, characterized in that: An output end of the optical coupler is connected to a power supply via a resistor, and the potential of the output end is controlled according to the on or off state of the optical coupler to generate a drill pipe phase grounding detection signal.

3. The drilling system drill pipe phase grounding detection device according to any one of claims 1 or 2, characterized in that: One output end of the optocoupler is connected to the other output end of the optocoupler via a capacitor, and the other output end of the optocoupler is grounded.

4. The drilling system drill pipe phase grounding detection device according to claim 1, characterized in that: The detection module further includes: a first resistor; An input end of the optical coupler is connected to a cable through the first resistor so as to be connected to a detection probe.

5. The drilling system drill pipe phase grounding detection device according to claim 4, characterized in that: The detection module further includes: a fourth resistor, and the other input end of the optocoupler is grounded through the fourth resistor.

6. A drilling system drill pipe phase grounding protection system, characterized in that: The system includes: a drilling system drill pipe phase grounding detection device and a relay; the drilling system drill pipe phase grounding detection device is connected to the drilling system's power distribution cabinet and frequency converter via the relay; wherein, The drilling system drill pipe phase grounding detection device includes: a detection module, a power supply module; the detection module includes: a detection probe, an optical coupler; The detection probe is connected to the drill pipe to be detected, and an input end of the optical coupler is connected to the detection probe via a cable; the power supply module applies a DC signal to the drill pipe phase grounding point to be detected, and the detection probe receives the DC signal and transmits the DC signal to the optical coupler via a cable, and controls the optical coupler to be turned on or off according to the DC signal to generate a drill pipe phase grounding detection signal; The output terminal and the input terminal of the power module are grounded via a capacitor respectively; The power module is an isolation chip used to isolate the earth grounding point and the drill pipe phase grounding point; The relay controls the power distribution cabinet and the emergency stop switch of the frequency converter of the electric drilling system according to the detection signal.

7. The drilling system drill pipe grounding protection system according to claim 6, characterized in that: An output end of the optical coupler is connected to a power supply via a resistor, and the potential of the output end is controlled according to the on or off state of the optical coupler to generate a drill pipe phase grounding detection signal.

8. The drilling system drill pipe grounding protection system according to any one of claims 6 or 7, characterized in that: One output end of the optocoupler is connected to the other output end of the optocoupler via a capacitor, and the other output end of the optocoupler is grounded.

9. The drilling system drill pipe grounding protection system according to claim 6, characterized in that: The detection module further includes: a first resistor; An input end of the optical coupler is connected to a cable through the first resistor so as to be connected to a detection probe.

10. The drilling system drill pipe phase grounding protection system according to claim 9, characterized in that: The detection module further includes: a fourth resistor, and the other input end of the optocoupler is grounded through the fourth resistor.

11. A method for detecting ground contact of drill pipes in a drilling system, characterized in that: The method uses the drilling system drill pipe grounding detection device according to any one of claims 1 to 5 to perform grounding detection on the drilling system drill pipe.

12. A drilling system drill pipe phase grounding protection method, characterized in that: The method uses the drilling system drill pipe phase grounding protection system described in any one of claims 6-10 to control the switch of the drilling system's power distribution cabinet and inverter to achieve grounding protection for the drilling system's drill pipe.

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