Full-rotation guiding stable platform system and application method thereof

Abstract

The invention provides a full-rotation guiding stable platform system and an application method thereof, and the system comprises a stable control module which is arranged on an underground short section, is in communication connection with a ground system, receives and recognizes an instruction from the ground, detects tool face data decision of an underground drilling tool in real time, and generates a control signal for controlling a distribution module; the bus transmission module is used for transmitting the control signal generated by the stability control module to the control distribution module; and the control distribution module is arranged on an underground short section connected with the stable control module, responds to the control signal and adjusts a disc valve in real time, and the relative position of the drill rod is stabilized. By adopting the system, the problems of inaccurate data and insufficient control accuracy in the prior art can be effectively solved, and the system is high in response speed, high in data transmission rate, suitable for various application scenes in the field of petroleum drilling and high in practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling stable platforms, and in particular to a fully rotary steerable stable platform system and an application method thereof. Background Art

[0002] The stable platform is the core of the near-bit rotary steering technology. Some of the stable platforms in use are composed of a turbine generator, an electronic cabin, and a measurement, control, and communication electronic system. The stable platform controls the drilling direction according to pre-set instructions or downlink instructions, mainly controlling the important parameter of the tool face angle. The existing stable platform uses a turbine generator as the generator of system power. The flow of drilling fluid drives the turbine to generate electricity to provide power for downhole tools. The rotation direction is clockwise; the AC power generated is rectified, stabilized, and filtered to provide power to the electrical and electronic equipment in the entire platform. In addition to power supply, the turbine generator also serves as a receiving device for downlink instructions. The downlink instructions are sent to the well by adjusting the flow of drilling fluid. After detecting the changes in the AC voltage and frequency of the generator, the relevant receiving circuit of the stable platform obtains the downlink control instruction.

[0003] The torque generator rotates counterclockwise and is used to generate a torque opposite to that of the turbine generator. The control circuit can keep the shaft stable at the specified tool face angle. The CPU controls the current of the MOS tube, i.e. the current of the torque generator, after D / A conversion, synthesis, PWM and other processing, to adjust the torque of the torque generator. The sealed electronic cabin is set at the upper end of the torque generator, which mainly consists of four functional circuits: power supply circuit, detection circuit, communication circuit and control circuit. A rate gyroscope is set in the electronic cabin to detect the angular velocity and rotation trend of the stable platform; in the experimental scenario, without hanging the drilling measurement instrument, a three-axis gravity accelerometer for detecting the well inclination angle and tool face angle is also set in the electronic cabin, as well as a downlink signal receiver circuit, short-range communication and control circuit, etc., for the convenience of experiment.

[0004] During operation, the tool face angle is set as the control target. First, the conditioned signals of the gyro and accelerometer are converted by A / D, and then the CPU calculates the rotational angular velocity, well inclination and tool face angle. If the tool face angle is less than the preset setting angle, the CPU uses the control method, and the D / A outputs the corresponding voltage signal, which is then converted into a series of voltage signals to drive the MOS tube to increase the current of the torque generator, thereby increasing the torque and rotating the tool itself in the counterclockwise direction, closer to the preset tool face angle, and realizing closed-loop adjustment, so that the measured tool face angle tracks the target tool face angle. Based on this, it can be seen that the process of stable platform control is the process of adjusting the current of the torque generator.

[0005] However, the existing guidance systems mostly use angular velocity sensors, which result in inaccurate data collection, and are prone to untimely feedback on the tool face and slow system response. The forward and reverse rotations of the disc valve often cannot be adjusted in time, resulting in errors on the tool face and deviation from the center of the target during drilling.

[0006] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0007] To solve the above problems, the present invention provides a fully rotary steerable stable platform system, which can effectively and accurately control the upper and lower disc valves, thereby adjusting the flow rate of drilling fluid in the flow channel for protection, and the direction and size of the pushing force can be freely adjusted according to ground instructions and algorithms, and the positive and reverse rotation position adjustments of the upper and lower disc valves are timely and fully controllable; in one embodiment, the system includes.

[0008] The ground information processing and display module is connected to the ground control system and is used to provide data encoding and decoding services and data display services to the ground control system and staff.

[0009] The stability control module is arranged on the downhole short section, is in communication connection with the ground information processing and display module, is configured to receive and identify instructions from the ground, detect the tool face data of the downhole drilling tool in real time, and make decisions to generate control signals for controlling the distribution module.

[0010] The bus transmission module is configured to transmit the control signal generated by the stability control module to the control distribution module and transmit electric energy at the same time.

[0011] The control distribution module is arranged on another downhole short section connected to the stabilization control module through the bus transmission module, and is configured to adjust the disc valve in real time in response to the control signal to stabilize the relative position of the drill pipe.

[0012] Optionally, in one embodiment, the stability control module comprises: a pulser unit and a power supply unit;

[0013] The pulser unit is used to encode and decode the setting instruction information on the ground, process and generate downhole control signals, and realize interactive signal conversion between the ground and the downhole; the power supply unit includes a downhole generator unit and a rectifier circuit.

[0014] Further, in one embodiment, the stability control module further includes: a central control circuit unit, an acceleration acquisition unit and a fluxgate acquisition unit;

[0015] The central control circuit unit is connected to the pulser unit, the acceleration acquisition unit and the fluxgate acquisition unit respectively, and controls the acquisition of acceleration information and fluxgate information as tool face data according to the control signal from the pulser unit, and generates a tool face adjustment command according to the measurement information of the acceleration acquisition unit and the measurement information of the fluxgate acquisition unit.

[0016] Preferably, in one embodiment, the central control circuit is configured to generate a tool face adjustment command according to the following operations:

[0017] According to the measurement information of the acceleration acquisition unit and the fluxgate acquisition unit, the gravity tool face and the magnetic tool face are calculated respectively, the current torque motor position is determined, the adjustment parameters matching the current tool face are determined according to the set tool face, and the corresponding tool face adjustment command signal of the control distribution module is formed according to the adjustment parameters.

[0018] Furthermore, in one embodiment, the bus transmission module adopts a single bus module, which is configured to encode the signal output by the central control circuit and convert it into a single bus signal before sending it out, and to decode and convert the received single bus data and transmit it to the central control circuit; the bus transmission module performs denoising, filtering, waveform conversion, waveform phase locking and waveform reverse processing on the signal.

[0019] Optionally, in one embodiment, the control distribution module includes a guide main control circuit, a drive circuit and a torque motor.

[0020] The guide main control circuit receives the command signal delivered through the bus transmission module and transmits the command signal to the connected drive circuit;

[0021] The drive circuit is connected to the guide main control circuit, and drives the hydraulic pressure according to the command signal to complete the control of the torque motor, adjust the position of the torque motor, and realize the position adjustment of the upper disc valve and the lower disc valve.

[0022] Furthermore, in one embodiment, the control distribution module also includes a linear optocoupler, one end of which is connected to the disk valve, and the other end is connected to the guide main control circuit. The linear optocoupler is configured to detect the relative change information of the disk valve position in real time, and transmit the feedback to the stability control module through the guide main control circuit and the bus transmission module.

[0023] Preferably, in one embodiment, the stability control module is further configured as follows: the guidance main control circuit compares the feedback disc valve position relative change information with the set tool face information according to a set time period, determines the correction command information, and then controls the drive circuit and the torque motor to achieve further correction and adjustment until the error between the disc valve position relative change information and the set tool face information meets the set requirements.

[0024] In an optional embodiment, after the guidance main control circuit of the control distribution module receives the real-time disk valve position information detected by the linear optocoupler, the disk valve position is transmitted to the ground control center through the single bus module and the central control circuit. The ground control system or staff then decides whether the previously set command information is compatible. If not, the set command information is updated and sent down to achieve optimization and adjustment.

[0025] Based on the application aspects of the system described in any one or more of the above embodiments, the present invention further provides an application method of a fully rotational steerable stable platform system, which is applied to the system described in any one or more of the above embodiments, and the method includes:

[0026] The stability control module receives and identifies the setting instruction information from the ground, detects the tool face data of the downhole drilling tool in real time, and generates a control signal for controlling the distribution module by combining the setting instruction information and the tool face data of the drilling tool;

[0027] effectively transmitting information of the control signal generated by the stability control module to the control distribution module by using a bus transmission module;

[0028] adjusting the disc valve in response to the control signal by controlling the distribution module to stabilize the relative position of the drill pipe;

[0029] The control distribution module detects the position information of the downhole disc valve in real time, and independently decides and adjusts the instructions according to the real-time position information and the set instruction information to realize the closed-loop adjustment;

[0030] The control distribution module transmits the detected disc valve position information to the ground through the bus transmission module and the stability control module, providing support for the ground control system or staff to update the setting command information.

[0031] Based on other aspects of the method described in the above embodiments, the present invention further provides a storage medium on which program codes for implementing the method described in the above embodiments are stored.

[0032] Compared with the closest prior art, the present invention also has the following beneficial effects:

[0033] The present invention provides a fully rotary steerable stabilization platform system and an application method thereof. The system includes a stabilization control module arranged on a downhole short section, which is communicatively connected with an uphole system, receives and identifies instructions from the ground, and detects tool face data of downhole drilling tools in real time to make decisions and generate control signals for controlling a distribution module. The embodiment of the present invention implements the detection of acceleration information and magnetic flux information downhole as tool face data, which has higher accuracy and helps to generate reliable control signals.

[0034] The bus transmission module transmits the control signal generated by the stability control module to the control distribution module and transmits electric energy at the same time; the set bus transmission module is used to realize the transmission of data and electric energy, with high data transmission rate and good timeliness of control operations in each link.

[0035] The control distribution module adjusts the disc valve in real time in response to the control signal, stabilizes the relative position of the drill pipe based on the autonomous closed-loop control logic, and completes the flow channel and position control of the fully rotary steering stable platform. It is suitable for various application scenarios in the field of oil drilling and provides a basis for fast and accurate drilling decisions underground.

[0036] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0038] Figure 1 It is a structural schematic diagram of a fully rotational steerable stable platform system provided by an embodiment of the present invention;

[0039] Figure 2 This is an example diagram of a single bus transmission module of a fully rotary guided stable platform system provided in an embodiment of the present invention;

[0040] Figure 3 It is a flow chart of an application method of a fully rotational steerable stable platform provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following will describe the implementation methods of the present invention in detail in conjunction with the accompanying drawings and embodiments, so that the implementers of the present invention can fully understand how the present invention applies technical means to solve technical problems and achieve the implementation process of technical effects and implement the present invention specifically according to the above implementation process. It should be noted that as long as there is no conflict, the various embodiments and various features of the embodiments in the present invention can be combined with each other, and the technical solutions formed are all within the protection scope of the present invention.

[0042] Although the flowcharts describe the operations as sequential processes, many of the operations may be performed in parallel, concurrently, or simultaneously. The order of the operations may be rearranged. A process may be terminated when its operations are completed, but may also have additional steps not included in the accompanying drawings. A process may correspond to a method, function, procedure, subroutine, subprogram, etc.

[0043] Computer devices include user devices and network devices. Among them, user devices or clients include but are not limited to computers, smart phones, PDAs, etc.; network devices include but are not limited to a single network server, a server group consisting of multiple network servers, or a cloud composed of a large number of computers or network servers based on cloud computing. Computer devices can be operated alone to implement the present invention, or they can be connected to the network and implement the present invention through interactive operations with other computer devices in the network. The network where the computer device is located includes but is not limited to the Internet, wide area network, metropolitan area network, local area network, VPN network, etc.

[0044] The terms "first", "second", etc. may be used herein to describe various units, but these units should not be limited by these terms, and these terms are used only to distinguish one unit from another unit. The term "and / or" used herein includes any and all combinations of one or more of the listed associated items. When a unit is referred to as being "connected" or "coupled" to another unit, it can be directly connected or coupled to the other unit, or there can be intermediate units.

[0045] The terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms "one", "one" and "item" used herein are also intended to include plural numbers. It should also be understood that the terms "include" and / or "comprise" used herein specify the existence of stated features, integers, steps, operations, units and / or components, without excluding the existence or addition of one or more other features, integers, steps, operations, units, components and / or combinations thereof.

[0046] As a high-tech drilling system in the oil field, the near-bit rotary steering system is a technology with significant development demand in the current oil field. The stabilizing platform is the core of the near-bit rotary steering technology. When used, the role of the stabilizing platform is to create a relatively stable platform in the rotary steering system that is not affected by the rotation of the drill pipe, so that the tool face angles of the steering tool and the telescopic ribs can remain stable during the rotation.

[0047] In the prior art, some of the stabilizing platforms in use are composed of a turbine generator, an electronic cabin, and a measurement, control, and communication electronic system. The stabilizing platform controls the drilling direction according to pre-set instructions or downlink instructions, and mainly controls the important parameter of the tool face angle. For example, when creating a deflection, the drilling fluid drives the telescopic ribs to expand in a specified direction to touch the well wall to generate thrust, so that the drilling tool drills in the designed direction; when straightening, the telescopic ribs are evenly expanded in sequence to contact the well wall, and the resultant force is equal to zero.

[0048] The existing stabilization platform uses a turbine generator as the generator of system power. The turbine is driven by the flow of drilling fluid to generate electricity to provide power for downhole tools. The rotation direction is clockwise. The AC power generated by it is rectified, stabilized and filtered to provide power to the electrical and electronic equipment in the entire platform. In addition to power supply, the turbine generator also serves as a receiving device for downlink instructions. The downlink instructions are sent to the well by adjusting the flow of drilling fluid. After detecting the changes in the AC voltage and frequency of the generator, the relevant receiving circuit of the stabilization platform obtains the downlink control instructions.

[0049] The torque generator rotates counterclockwise and is used to generate torque opposite to the turbine generator. The control circuit can keep the shaft stable at the specified tool face angle. The current of the MOS tube, i.e. the current of the torque generator, is controlled by the CPU after D / A conversion, synthesis, PWM and other processing to adjust the torque of the torque generator.

[0050] The sealed electronic cabin is set at the upper end of the torque generator, which is mainly composed of four functional circuits: power circuit, detection circuit, communication circuit and control circuit. The rate gyroscope is set in the electronic cabin to detect the angular velocity and rotation trend of the stable platform; in the experimental scenario, without hanging the drilling measurement instrument, the electronic cabin is also equipped with a three-axis gravity accelerometer for detecting the well inclination angle and tool face angle, as well as a downlink signal receiver circuit, short-range communication and control circuit, etc., for the convenience of experiment.

[0051] During operation, the tool face angle is set as the control target. First, the conditioned signals of the gyro and accelerometer are converted by A / D, and then the CPU calculates the rotational angular velocity, well inclination and tool face angle. If the tool face angle is less than the preset setting angle, the CPU uses the control method, and the D / A outputs the corresponding voltage signal, which is then converted into a series of voltage signals to drive the MOS tube to increase the current of the torque generator, thereby increasing the torque and rotating the tool itself in the counterclockwise direction, closer to the preset tool face angle, and realizing closed-loop adjustment, so that the measured tool face angle tracks the target tool face angle. Based on this, it can be seen that the process of stable platform control is the process of adjusting the current of the torque generator.

[0052] However, the existing guidance systems mostly use angular velocity sensors, which result in inaccurate data collection, and are prone to untimely feedback on the tool face and slow system response. The forward and reverse rotations of the disc valve often cannot be adjusted in time, resulting in errors on the tool face and deviation from the center of the target during drilling.

[0053] Although there are many kinds of angle sensors on the market, the electronic cabin of the stabilizing platform rotates and rotates asynchronously with the outer tube of the drill collar, so the detection task cannot be completed with general angle sensors; and most general sensors are relatively large in size and cannot be installed in the narrow electronic cabin, so the inclination sensor is not suitable for measuring the well inclination angle. The researchers of the present invention took into account the small size of the three-axis gravity accelerometer. Based on the principle of gravity acceleration measurement, it can simultaneously complete the measurement of tool face angle and well inclination angle, so it is suitable for real-time detection of well inclination angle and tool face angle.

[0054] To solve the above problems, the present invention provides a fully rotary steerable stable platform system and an application method thereof. The system provided by the present invention integrates downhole instruments and modules such as an acceleration acquisition unit, a fluxgate data acquisition unit, a drive circuit, a load, and a measurement and feedback module. According to the instructions set on the ground, the central control module collects data and transmits ground tool face setting commands. Through the control module algorithm of the steerable main control circuit, the positions of the upper and lower valves are controlled to adjust the flow rate of the drilling fluid in the flow channel to correspond to different directions and different pushing forces.

[0055] This patent relates to the technical field of fully rotary steerable stable platform, which mainly includes several modules such as stable control module, bus transmission module, control distribution module, etc. Among them, the built-in pulser in the stable control module decodes and encodes the ground information, which is specifically used for the research and development of downhole instruments and equipment such as rotary steering, while drilling measurement, and while drilling measurement and control. In addition, the fully rotary steerable stable platform system designed by the present invention has an information decoding and encoding display module for the ground control center or staff.

[0056] Next, the structural components, connection modes and functional principles of the system of the embodiment of the present invention are described in detail based on the drawings. Although the logical order of each operation is shown in the process of describing the operating principle of the system structure, in some cases, the operations shown or described can be performed in a different order than here.

[0057] Embodiment 1

[0058] Figure 1 The structure diagram of the fully rotational steerable stable platform system provided by the first embodiment of the present invention is shown. Figure 1 It can be seen that the system includes.

[0059] The ground information processing and display module is connected to the ground control system and is used to provide data encoding and decoding services and data display services to the ground control system and staff.

[0060] The stability control module is arranged on the downhole short section, is in communication connection with the ground information processing and display module, is configured to receive and identify instructions from the ground, detect the tool face data of the downhole drilling tool in real time, and make decisions to generate control signals for controlling the distribution module.

[0061] The bus transmission module is configured to transmit the control signal generated by the stability control module to the control distribution module and transmit electric energy at the same time.

[0062] The control distribution module is arranged on another downhole short section connected to the stabilization control module through the bus transmission module, and is configured to adjust the disc valve in real time in response to the control signal to stabilize the relative position of the drill pipe.

[0063] The embodiment of the present invention provides a new fully rotary steering stable platform system, which can be used as a near-drill bit fully rotary steering device to achieve real-time measurement and efficient closed-loop precise control of downhole tool face angle and well inclination angle, with fast data transmission speed, fast response and good practicality, providing a basis for fast and accurate drilling decisions downhole.

[0064] The fully rotary steering system provided in an embodiment of the present invention includes three modules: a stability control module, a bus transmission module and a control distribution module. Among them, the stability control module serves as a downhole stability control platform, and the control distribution module serves as a drilling fluid control distribution module; the fully rotary steering system specifically mainly includes a pulser and power supply, a central control circuit, a single bus circuit, a drive circuit power amplifier circuit, a torque motor, a linear optocoupler, a load and other structures.

[0065] In one embodiment, the stability control module includes: a pulser unit and a power supply unit; the pulser unit is used to encode and decode the setting instruction information on the ground, process and generate downhole control signals, and realize the interactive signal conversion between the ground and the downhole; wherein the power supply unit includes a downhole generator unit and a rectifier circuit.

[0066] In actual application, the downhole pulser and power supply mainly include the pulser drive circuit and the power supply motor. The pulser mainly completes the encoding and decoding functions and completes information transmission and interaction with the ground. The current power supply mainly includes the downhole generator and the rectifier circuit.

[0067] Further, in an optional embodiment, the stability control module further includes: a central control circuit unit, an acceleration acquisition unit and a fluxgate acquisition unit;

[0068] The central control circuit unit is connected to the pulser unit, the acceleration acquisition unit and the fluxgate acquisition unit respectively, and controls the acquisition of acceleration information and fluxgate information as real-time tool face data according to the control signal from the pulser unit. The acceleration acquisition unit can adopt an accelerometer to generate a tool face adjustment command according to the measurement information of the accelerometer and the measurement information of the fluxgate acquisition unit.

[0069] Among them, when in use, one end of the central control circuit is connected to the pulser, and is also connected to the acceleration acquisition circuit and the fluxgate acquisition circuit; the central control circuit calculates the gravity tool surface and the magnetic tool surface, determines the current torque motor position, adjusts the current tool surface according to the set tool surface, and gives the corresponding signal to the drive circuit. The central control circuit is connected to the single bus module and sends command data to the single bus module.

[0070] Specifically, in a preferred embodiment, the central control circuit is configured to generate a tool face adjustment command according to the following operations:

[0071] According to the measurement information of the acceleration acquisition unit and the fluxgate acquisition unit, the gravity tool face and the magnetic tool face are calculated respectively, the current torque motor position is determined, the adjustment parameters matching the current tool face are determined according to the set tool face, and the corresponding tool face adjustment command signal of the control distribution module is formed according to the adjustment parameters.

[0072] Furthermore, the bus transmission module includes a single bus module, which is configured to encode and convert the signal output by the central control circuit into a single bus signal and then send it out, and decode and convert the received single bus data and then transmit it to the central control circuit.

[0073] The bus transmission module is mainly used to transmit power and data signals, supply power to the drive circuit and transmit command signals. A guide realizes power and signal transmission, similar to carrier communication. The central control circuit outputs 485 transmission. The single bus module realizes 485 bus communication conversion single bus encoding transmission, and then receives the single bus encoding and decodes it, and further converts it into 485 bus communication. Figure 2 shown.

[0074] The single bus module uses a five-level filtering technology to implement decoding processing, and is configured to perform denoising, filtering, waveform conversion, waveform phase locking, and waveform inversion processing on the signal underground, thereby greatly improving the signal-to-noise ratio under high temperature and high vibration conditions underground.

[0075] In actual application, the central control circuit of the stability control module collects acceleration sensor data and flux gate data, and transmits the collected data to the single bus module for transmission. After the guidance main control circuit receives the sensor data, flux gate data and the control data set by the ground control center (such as setting the tool face angle information), it generates an initial control command signal to the motor drive circuit. The drive module further controls the torque motor, and the torque motor adjusts the relative position between the upper disc valve and the lower disc valve.

[0076] The downhole generator power module transmits electrical energy through the single bus module; the single bus transmits data to the guide main control circuit, the single bus transmits electrical energy to the power module of the drilling fluid control distribution module, and the power module of the drilling fluid control distribution module supplies power to each functional structure module in the control distribution module.

[0077] Furthermore, the control distribution module adjusts the disc valve in real time in response to the control signal to stabilize the relative position of the drill pipe. In a preferred embodiment, the control distribution module includes a guide main control circuit, a drive circuit and a torque motor.

[0078] The guide main control circuit receives the command signal delivered through the bus transmission module and transmits the command signal to the connected drive circuit;

[0079] The drive circuit is connected to the guide main control circuit, and drives the hydraulic pressure according to the command signal to complete the control of the torque motor, adjust the position of the torque motor, and realize the position adjustment of the upper disc valve and the lower disc valve.

[0080] Among them, in actual application, in an optional embodiment, the driving circuit module includes modules such as power supply circuit, signal conversion and power amplification. After receiving the command signal, the driving hydraulics completes the control of the torque motor, and quickly adjusts the position of the torque motor, completes the position adjustment of the upper disc valve and the lower disc valve, further stabilizes the relative position of the drill pipe, completes the flow channel and position control of the full-rotation steering stable platform, and realizes obtaining different sizes of pushing forces based on the flow rate of the drilling fluid in the flow channel.

[0081] Considering that the acceleration acquisition unit, fluxgate acquisition unit, pulser, power supply, central control circuit, etc. are installed on one short section; the drive circuit and motor are concentrated on another short section, so a single bus phase module is needed to connect the two short sections to complete the function of transmitting power and command signals.

[0082] Furthermore, in an optional embodiment, the control distribution module also includes a linear optocoupler, one end of which is connected to the disk valve structure downhole, and the other end is connected to the guide main control circuit. It is configured to detect the relative change information of the disk valve position in real time, and transmit the feedback to the stability control module through the guide main control circuit and the bus transmission module. In actual application, the linear optocoupler is usually connected to the upper disk valve.

[0083] The position of the disk valve is disturbed and will change. The linear optocoupler mainly completes the detection and feedback of the disk valve. During the adjustment process under interference, the linear optocoupler detects the relative change of the position and feeds back the collected change data to the central control circuit. The central control circuit compares and corrects the feedback data with the set parameters, then outputs the corrected data and repeats the command data transmission. The control distribution module further controls the torque motor according to the command data to adjust the position of the disk valve.

[0084] Therefore, in one embodiment, the control allocation module is further configured as follows: the guide main control circuit compares the feedback disk valve position relative change information with the set tool face information according to a set time period, determines the correction command information, and then controls the drive circuit and the torque motor to achieve further correction and adjustment to keep the error between the disk valve position relative change information and the set tool face information meeting the set requirements.

[0085] After the linear optocoupler detects and collects the relative positions of the upper disc valve and the lower disc valve, it feeds back to the guide main control circuit. The guide main control circuit combines the real-time position information of the disc valve and the set tool face angle information to generate the current appropriate adjustment control command signal to the motor drive circuit, forming an autonomous closed-loop control. The guide main control circuit issues a command again to further adjust the relative positions of the torque motor and the upper and lower disc valves; the control is continuously circulated and adjusted, and finally the drilling fluid flow in the flow channel is flexibly controlled, thereby obtaining different pushing forces and stably controlling the position of the downhole disc valve.

[0086] On the other hand, after the guidance main control circuit of the control distribution module receives the real-time disc valve position information detected by the linear optocoupler, it also transmits the disc valve position to the ground control center through the single bus module and the central control circuit, so that the ground staff can view the actual disc valve position information in real time, and then decide whether the set command information is suitable. If not, the required command information is reset and sent down to achieve optimization and adjustment.

[0087] When there is no need to adjust the tool face command information, the main control circuit can independently detect and adjust the downhole disc valve position in a closed loop to maintain stable and precise control of the downhole disc valve assembly.

[0088] The fully rotary steerable stabilizing platform system of the embodiment of the present invention can effectively and precisely control the upper and lower disc valves, thereby adjusting the flow rate of drilling fluid in the flow channel for protection, and the direction and size of the pushing force can be freely adjusted according to ground instructions and algorithms, and the positive and reverse rotation positions of the upper and lower disc valves can be adjusted in time and fully controllable. The mechanical structure of this system is simple, low cost, fast response speed, advanced technology, and suitable for large-scale promotion and application of rotary steerable technology, which greatly reduces the cost of oil and gas extraction, which has a good role in promoting energy conservation and efficiency improvement.

[0089] Compared with the traditional push-type rotary steering technology, the fully rotary steering stable platform system provided by the embodiment of the present invention has a simplified structure, low cost, fast response speed, real-time control, fast data transmission rate, large unit data transmission volume, is suitable for various application scenarios in the field of oil drilling, is easy to popularize, and has high practicality.

[0090] In the fully rotational steerable stable platform system provided by the embodiment of the present invention, each module or unit structure can operate independently or in combination according to the actual structural setting requirements and signal processing requirements to achieve corresponding technical effects.

[0091] Embodiment 2

[0092] The system is described in detail in the embodiments disclosed in the above invention. Based on other aspects of the system described in any one or more embodiments, the present invention also provides an application method of a fully-rotating guided stable platform system, which is applied to the fully-rotating guided stable platform system described in any one or more embodiments. A specific embodiment is given below for detailed description.

[0093] Specifically, Figure 3 FIG. 4 is a flow chart showing an application method of a fully rotationally guided stable platform provided in an embodiment of the present invention. Figure 3 As shown, the method includes:

[0094] The stability control module receives and identifies the setting instruction information from the ground, detects the tool face data of the downhole drilling tool in real time, and generates a control signal for controlling the distribution module by combining the setting instruction information and the tool face data of the drilling tool;

[0095] effectively transmitting information of the control signal generated by the stability control module to the control distribution module by using a bus transmission module;

[0096] By controlling the distribution module, the disc valve is adjusted in real time in response to the control signal to stabilize the relative position of the drill pipe;

[0097] The control distribution module detects the position information of the downhole disc valve in real time, and independently decides and adjusts the instructions according to the real-time position information and the set instruction information to realize the closed-loop adjustment;

[0098] The control distribution module transmits the detected disc valve position information to the ground through the bus transmission module and the stability control module, providing support for the ground control system or staff to update the setting command information.

[0099] The fully rotational steerable stabilization platform system used includes: ground information processing and display module, stabilization control module, bus transmission module and control distribution module.

[0100] The ground information processing and display module is connected to the ground control system and is used to provide data encoding and decoding services and data display services to the ground control system and staff;

[0101] The stability control module is arranged on the downhole short section, is in communication connection with the ground information processing and display module, and is configured to receive and identify instructions from the ground, detect tool face data of the downhole drilling tool in real time, and make decisions to generate control signals for controlling the distribution module;

[0102] The bus transmission module is configured to transmit the control signal generated by the stability control module to the control distribution module while transmitting electrical energy;

[0103] The control distribution module is arranged on another downhole short section connected to the stabilization control module through the bus transmission module, and is configured to adjust the disc valve in real time in response to the control signal to stabilize the relative position of the drill pipe.

[0104] Optionally, in one embodiment, the stability control module comprises: a pulser unit and a power supply unit;

[0105] The pulser unit is used to encode and decode the setting instruction information on the ground, process and generate downhole control signals, and realize the interactive signal conversion between the ground and the downhole;

[0106] The power supply unit includes a downhole generator unit and a rectifier circuit.

[0107] Further, in one embodiment, the stability control module further includes: a central control circuit unit, an acceleration acquisition unit and a fluxgate acquisition unit;

[0108] The central control circuit unit is connected to the pulser unit, the acceleration acquisition unit and the fluxgate acquisition unit respectively, and controls the acquisition of acceleration information and fluxgate information as tool face data according to the control signal from the pulser unit, and generates a tool face adjustment command according to the measurement information of the acceleration acquisition unit and the measurement information of the fluxgate acquisition unit.

[0109] Preferably, in one embodiment, the central control circuit is configured to generate a tool face adjustment command according to the following operations:

[0110] According to the measurement information of the acceleration acquisition unit and the fluxgate acquisition unit, the gravity tool face and the magnetic tool face are calculated respectively, the current torque motor position is determined, the adjustment parameters matching the current tool face are determined according to the set tool face, and the corresponding tool face adjustment command signal of the control distribution module is formed according to the adjustment parameters.

[0111] Furthermore, in one embodiment, the bus transmission module adopts a single bus module, which is configured to encode the signal output by the central control circuit and convert it into a single bus signal before sending it out, and to decode and convert the received single bus data and transmit it to the central control circuit; the bus transmission module performs denoising, filtering, waveform conversion, waveform phase locking and waveform reverse processing on the signal.

[0112] Optionally, in one embodiment, the control distribution module includes a guide main control circuit, a drive circuit and a torque motor.

[0113] The guide main control circuit receives the command signal delivered through the bus transmission module and transmits the command signal to the connected drive circuit;

[0114] The drive circuit is connected to the guide main control circuit, and drives the hydraulic pressure according to the command signal to complete the control of the torque motor, adjust the position of the torque motor, and realize the position adjustment of the upper disc valve and the lower disc valve.

[0115] Furthermore, in one embodiment, the control distribution module also includes a linear optocoupler, one end of which is connected to the disk valve, and the other end is connected to the guide main control circuit. The linear optocoupler is configured to detect the relative change information of the disk valve position in real time, and transmit the feedback to the stability control module through the guide main control circuit and the bus transmission module.

[0116] Preferably, in one embodiment, the stability control module is further configured as follows: the guidance main control circuit compares the feedback disc valve position relative change information with the set tool face information according to a set time period, determines the correction command information, and then controls the drive circuit and the torque motor to achieve further correction and adjustment until the error between the disc valve position relative change information and the set tool face information meets the set requirements.

[0117] In an optional embodiment, after the guidance main control circuit of the control distribution module receives the real-time disk valve position information detected by the linear optocoupler, the disk valve position is transmitted to the ground control center through the single bus module and the central control circuit. The ground control system or staff then decides whether the previously set command information is compatible. If not, the set command information is updated and sent down to achieve optimization and adjustment.

[0118] For the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the order of the actions described, because according to the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0119] It should be pointed out that in other embodiments of the present invention, the method can also obtain a new application method of a fully-rotary steerable stable platform by combining one or several of the above-mentioned embodiments to achieve precise optimization of the fully-rotary steerable stable platform for drilling operations.

[0120] It should be noted that, based on the method in any one or more of the above-mentioned embodiments of the present invention, the present invention also provides a storage medium, on which is stored a program code that can implement the method as described in any one or more of the above-mentioned embodiments, and when the code is executed by the operating system, it can implement the application method of the fully rotational guided stable platform system as described above.

[0121] It should be understood that the embodiments disclosed in the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should be extended to equivalent substitutions of these features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0122] The "one embodiment" mentioned in the specification means that a particular feature, structure or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrase "one embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0123] Although the embodiments disclosed in the present invention are as above, the above contents are only embodiments adopted for facilitating the understanding of the present invention and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A fully rotational steerable stable platform system, characterized in that: The system comprises: A ground information processing and display module, which is connected to the ground control system and is used to provide data encoding and decoding services and data display services to the ground control system and staff; A stability control module, which is arranged on the downhole short section, is in communication connection with the ground information processing and display module, and is configured to receive and identify instructions from the ground, detect tool face data of the downhole drilling tool in real time, and make decisions to generate control signals for controlling the distribution module; a bus transmission module configured to transmit the control signal generated by the stability control module to the control distribution module while transmitting electrical energy; The control distribution module is arranged on another downhole short section connected to the stabilization control module through the bus transmission module, and is configured to adjust the disc valve in real time in response to the control signal to stabilize the relative position of the drill pipe.

2. The system according to claim 1, characterized in that The stability control module includes: a pulser unit and a power supply unit; The pulser unit is used to encode and decode the setting instruction information on the ground, process and generate downhole control signals, and realize the interactive signal conversion between the ground and the downhole; The power supply unit includes a downhole generator unit and a rectifier circuit.

3. The system according to claim 1, characterized in that The stability control module also includes: a central control circuit unit, an acceleration acquisition unit and a fluxgate acquisition unit; The central control circuit unit is connected to the pulser unit, the acceleration acquisition unit and the fluxgate acquisition unit respectively, and controls the acquisition of acceleration information and fluxgate information as tool face data according to the control signal from the pulser unit, and generates a tool face adjustment command according to the measurement information of the acceleration acquisition unit and the measurement information of the fluxgate acquisition unit.

4. The system according to claim 1, characterized in that The central control circuit is configured to generate a tool face adjustment command according to the following operations: According to the measurement information of the acceleration acquisition unit and the fluxgate acquisition unit, the gravity tool face and the magnetic tool face are calculated respectively, the current torque motor position is determined, the adjustment parameters matching the current tool face are determined according to the set tool face, and the corresponding tool face adjustment command signal of the control distribution module is formed according to the adjustment parameters.

5. The system according to claim 1, characterized in that The bus transmission module adopts a single bus module, which is configured to encode the signal output by the central control circuit and convert it into a single bus signal before sending it out, and to decode and convert the received single bus data and transmit it to the central control circuit; the bus transmission module performs denoising, filtering, waveform conversion, waveform phase locking and waveform reverse processing on the signal.

6. The system according to claim 1, characterized in that The control distribution module includes the guide main control circuit, drive circuit and torque motor. The guide main control circuit receives the command signal delivered through the bus transmission module and transmits the command signal to the connected drive circuit; The drive circuit is connected to the guide main control circuit, and drives the hydraulic pressure according to the command signal to complete the control of the torque motor, adjust the position of the torque motor, and realize the position adjustment of the upper disc valve and the lower disc valve.

7. The system according to claim 1, characterized in that The control distribution module also includes a linear optocoupler, one end of which is connected to the disc valve, and the other end is connected to the guide main control circuit. The linear optocoupler is configured to detect the relative change information of the disc valve position in real time, and transmit the feedback to the stability control module through the guide main control circuit and the bus transmission module.

8. The system according to claim 1, characterized in that The stability control module is also configured as follows: the guidance main control circuit compares the feedback disc valve position relative change information with the set tool face information according to the set time period, determines the correction command information, and then controls the drive circuit and the torque motor to achieve further correction and adjustment until the error between the disc valve position relative change information and the set tool face information meets the set requirements.

9. The system according to claim 1, characterized in that After the guidance main control circuit of the control distribution module receives the real-time disc valve position information detected by the linear optocoupler, it transmits the disc valve position to the ground control center through the single bus module and the central control circuit. The ground control system or staff then decides whether the previously set command information is compatible. If not, the set command information is updated and sent down to achieve optimization and adjustment.

10. An application method of a fully rotary guided stable platform system, characterized in that: The method is applied to the system according to any one of claims 1 to 9, and the method comprises: The stability control module receives and identifies the setting instruction information from the ground, detects the tool face data of the downhole drilling tool in real time, and generates a control signal for controlling the distribution module by combining the setting instruction information and the tool face data of the drilling tool; effectively transmitting information of the control signal generated by the stability control module to the control distribution module by using a bus transmission module; adjusting the disc valve in response to the control signal by controlling the distribution module to stabilize the relative position of the drill pipe; The control distribution module detects the position information of the downhole disc valve in real time, and independently decides and adjusts the instructions according to the real-time position information and the set instruction information to realize the closed-loop adjustment; The control distribution module transmits the detected disc valve position information to the ground through the bus transmission module and the stability control module, providing support for the ground control system or staff to update the setting command information.

11. A storage medium, characterized in that: The storage medium stores program codes for implementing the method as claimed in claim 10.

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