Intelligent directional coring system

Abstract

The application provides an intelligent directional coring system, and relates to the technical field of downhole coring systems.The intelligent directional coring system comprises an intelligent decision system, an actuating mechanism, a dynamic measurement system and a monitoring system.The dynamic measurement system is used for measuring drilling parameters, trajectory parameters, bottom-hole engineering parameters and directional coring parameters and feeding the measured parameters to the monitoring system.The monitoring system processes the dynamic measurement parameters and inputs the parameters into the intelligent decision system.The intelligent decision system comprehensively judges the measurement parameters and intelligently controls the actuating mechanism to perform corresponding work according to the judgment result.The scheme provided by the application can solve the problems of few core parameters and untimely damage treatment of bottom-hole drilling tools.

Description

Technical Field

[0001] This invention relates to the field of downhole coring systems, and in particular to an intelligent directional coring system. Background Technology

[0002] Existing intelligent drilling systems and methods primarily focus on controlling and adjusting the drilling trajectory. For example, a patent application titled "An Intelligent Directional Closed-Loop Control Method and System for a Curved Shell Screw Drill String Assembly" adjusts the drilling trajectory through intelligent decision-making based on the acquisition of downhole and surface parameters, achieving closed-loop feedback for intelligent drilling control. However, it still suffers from drawbacks such as limited core parameter acquisition and untimely handling of downhole drill string damage. Therefore, a novel solution is urgently needed to address these issues. Summary of the Invention

[0003] The purpose of this invention is to provide an intelligent directional coring system to solve the problems of insufficient core parameter acquisition and untimely handling of damage to bottom hole drilling tools.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides an intelligent directional coring system, comprising: an intelligent decision-making system, an actuator, a dynamic measurement system, and a monitoring system; the dynamic measurement system is used to measure drilling parameters, trajectory parameters, bottom hole engineering parameters, and directional coring parameters, and feeds the measured parameters back to the monitoring system; the monitoring system processes the dynamic measurement parameters and inputs them into the intelligent decision-making system; the intelligent decision-making system comprehensively judges each measurement parameter and intelligently controls the actuator to perform corresponding work based on the judgment result.

[0006] Preferably, the intelligent decision-making system is used to determine whether the measured parameters are within the safe range. If they exceed the safety limit, an alarm signal is promptly transmitted to the wellhead operator to remind the drilling personnel to bring the bottom hole drill string to the surface for maintenance. If the bottom hole drill string is in good working condition, the actual drilling trajectory parameters are first compared with the designed trajectory parameters. If the error between the two is within the allowable range, no drilling trajectory adjustment is required. At this time, the actuator is controlled to carry out directional coring operations. If the actual drilling trajectory parameters deviate significantly from the designed trajectory parameters, exceeding the design allowable error range, the drilling trajectory needs to be adjusted through the actuator.

[0007] Preferably, the directional coring parameters include core entry length, core orientation marker, formation resistivity, and core tube stress.

[0008] Preferably, when the directional coring parameters are abnormal, the intelligent decision-making system autonomously plans the drilling trajectory to obtain more core samples from the abnormal formation.

[0009] Preferably, the intelligent decision-making system includes a ChatGPT module. Before going downhole, manual instructions are input to the ChatGPT module via an interface. The input content includes at least the drilling design trajectory and the safe range of each measurement parameter.

[0010] Preferably, the dynamic measurement system includes a rangefinder and a strain gauge. The rangefinder is installed at the upper end of the core barrel inside the drill string to measure the length of the core entering the core barrel. The strain gauge is installed on the inner wall near the upper end of the core barrel to monitor the stress change of the core barrel during the directional drilling process. The data collected by the rangefinder and the strain gauge are transmitted to the monitoring system, which then sends the data to the intelligent decision-making system. A core orientation cutter is installed at the lower end of the core barrel to mark the core, facilitating core orientation after core acquisition.

[0011] Preferably, the dynamic measurement system includes a temperature sensor, a pressure sensor, a vibration accelerometer, a torque sensor, a rotation speed sensor, and a resistivity measurement probe installed on the core bit at the bottom of the drill string. The temperature sensor, pressure sensor, vibration accelerometer, torque sensor, and rotation speed sensor are used to monitor the working condition of the core bit at the bottom of the well. The resistivity measurement probe is used to measure the resistivity of the formation in real time, which facilitates a preliminary judgment of the formation lithology. The data collected by the temperature sensor, pressure sensor, vibration accelerometer, torque sensor, rotation speed sensor, and resistivity measurement probe are collected in the monitoring system, and the monitoring system sends the data to the intelligent decision-making system.

[0012] Preferably, the ChatGPT module is integrated into the measurement while drilling system, and the ChatGPT module transmits data to the measurement while drilling system and then transmits the data to the surface via the measurement while drilling system.

[0013] Preferably, the actuator includes a winch, a bottom hole power drill, and a top drive.

[0014] The present invention achieves the following technical effects compared to the prior art:

[0015] (1) The intelligent directional coring system provided by the present invention can not only collect drilling parameters and borehole trajectory parameters, but also collect engineering parameters near the drill bit at the bottom of the well and directional core parameters, providing effective data support for obtaining core lithology and judging the working condition of the bottom hole drilling tool.

[0016] (2) The bottom hole drilling tool adopts a modular design, with simple mechanical structure, easy disassembly and assembly, high degree of data integration, and convenient maintenance and repair of the drilling tool.

[0017] (3) The intelligent decision-making system can autonomously plan the drilling trajectory based on the collected information, which can improve the acquisition of high-grade mineral (oil and gas) cores in the target area. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the intelligent directional coring system provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of a portion of the drilling tool provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of another part of the structure of the drilling tool provided in an embodiment of the present invention;

[0022] Figure 4 for Figure 3 Sectional view along line AA;

[0023] In the diagram: 1-Wireline retrieval assembly; 2-Measurement while drilling system; 3-Intelligent decision-making system; 4-Directional connector; 5-Screw drill bit; 6-First data module; 7-Radarmeter; 8-Strain gauge; 9-Coring barrel; 10-Temperature sensor; 11-Pressure sensor; 12-Vibration accelerometer; 13-Coring bit; 14-Torque sensor; 15-Slewing speed sensor; 16-Resistivity measurement probe; 17-Core directional cutting tool; 18-Second data module 。 Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] This invention provides an intelligent directional coring system, such as Figure 1As shown, it includes: intelligent decision-making system 3, actuator, dynamic measurement system and monitoring system; the dynamic measurement system is used to measure drilling parameters, trajectory parameters, bottom hole engineering parameters and directional coring parameters and feed the measured parameters back to the monitoring system. The monitoring system processes the dynamic measurement parameters and inputs them into intelligent decision-making system 3. Intelligent decision-making system 3 comprehensively judges each measurement parameter and intelligently controls the actuator to perform corresponding work based on the judgment results.

[0027] Before going down into the well, manual instructions are input into the intelligent decision-making system 3 via an interface. The input content includes at least the drilling design trajectory and the safe range of each measurement parameter.

[0028] The intelligent decision-making system 3 is used to determine whether the measured parameters are within the safe range. If they exceed the safety limit, it promptly sends an alarm signal to the wellhead operator, reminding them to bring the bottom hole drill string to the surface for maintenance. If the bottom hole drill string is in good working condition, the actual drilling trajectory parameters are first compared with the designed trajectory parameters. If the error is within the allowable range, no drilling trajectory adjustment is needed. At this time, the actuator is controlled to carry out directional coring operations. If the actual drilling trajectory parameters deviate significantly from the designed trajectory parameters, exceeding the design allowable error range, the drilling trajectory needs to be adjusted through the actuator. Specifically, this is done through compound drilling or sliding drilling. This process is mainly powered by the top drive (rotary table) or bottom hole power drill string in the actuator.

[0029] The dynamic measurement system in the intelligent directional coring system provided by this invention can measure bottom hole engineering parameters and directional coring parameters. The intelligent decision system 3 comprehensively judges each measurement parameter and intelligently controls the actuator to perform corresponding work based on the judgment result, which solves the problems of insufficient core parameter acquisition and untimely handling of bottom hole drill bit damage in existing directional coring drill tools.

[0030] In some embodiments, directional coring parameters include core entry length, core orientation marking, formation resistivity, and core tube stress. Core entry length is a crucial indicator for determining whether the core is blocked within the core tube. Core orientation marking involves marking the core material entering the core tube to determine its position in three-dimensional underground space. Formation resistivity is an important parameter for assessing the lithological characteristics of the core; if anomalies are detected, the intelligent decision-making system 3 can autonomously plan the drilling trajectory to facilitate the acquisition of more core samples from anomalous formations, thereby improving the mineral exploration hit rate in the target area. Core tube stress is primarily used to detect the working stress of the core tube during the directional drilling section, serving as an important basis for determining whether the core tube is damaged.

[0031] Drilling parameters include well depth, drilling pressure, rotation speed, mud pump displacement, and pump pressure.

[0032] The trajectory parameters include well inclination angle, azimuth angle, and tool face angle.

[0033] Bottom hole engineering parameters include drill bit rotation torque, drill bit rotation speed, near-bit vibration acceleration, bottom hole temperature, and bottom hole pressure.

[0034] In some embodiments, such as Figures 2-4 As shown, the dynamic measurement system includes a rangefinder 7 and a strain gauge 8. The rangefinder 7 is installed at the upper end of the core barrel 9 inside the drill bit and is used to measure the length of the rock core entering the core barrel 9. The strain gauge 8 is installed on the inner wall near the upper end of the core barrel 9. The strain gauge 8 is used to monitor the stress change of the core barrel 9 during the core taking process in the directional drilling section. The data collected by the rangefinder 7 and the strain gauge 8 are transmitted to the monitoring system. The monitoring system sends the data to the intelligent decision system 3. The lower end of the core barrel 9 is equipped with a core orientation cutting tool 17. The core orientation cutting tool 17 marks the rock core with grooves to facilitate core orientation after obtaining the rock core.

[0035] In some embodiments, such as Figures 2-4 As shown, the dynamic measurement system includes a temperature sensor 10, a pressure sensor 11, a vibration accelerometer 12, a torque sensor 14, a rotation speed sensor 15, and a resistivity measuring probe 16, all mounted on the core bit 13 at the bottom of the drill string. The temperature sensor 10, pressure sensor 11, vibration accelerometer 12, torque sensor 14, and rotation speed sensor 15 are used to monitor the working condition of the core bit 13 at the bottom of the well. The resistivity measuring probe 16 is used to measure the resistivity of the formation in real time, facilitating a preliminary judgment of the formation lithology. The data collected by the temperature sensor 10, pressure sensor 11, vibration accelerometer 12, torque sensor 14, rotation speed sensor 15, and resistivity measuring probe 16 are collected by the monitoring system, which then sends the data to the intelligent decision-making system 3.

[0036] In some embodiments, the intelligent decision-making system 3 is a ChatGPT module.

[0037] In some embodiments, the monitoring system filters, compares, and processes dynamic measurement parameters before transmitting them to the intelligent decision-making system 3. The monitoring system includes a first data module 6 and a second data module 18. The first data module 6 is located near the rangefinder 7 and strain gauge 8 and is used to receive data information transmitted from the rangefinder 7 and strain gauge 8. The second data module 18 is located near the core drill bit 13 and is used to receive data information from each sensor.

[0038] In some embodiments, the actuators include a winch, a bottom hole power drill string, and a top drive. The intelligent decision system 3 communicates with and controls the working status of the winch, the bottom hole power drill string, and the top drive; the top drive may also be replaced by a wellhead rotary table.

[0039] In some embodiments, the drill string is also equipped with a wireline retrieval assembly 1, a directional connector 4, and a measurement while drilling (MWD) system 2.

[0040] The wireline retrieval assembly 1, the measurement while drilling system 2, the directional joint 4, the screw drill string 5, and the core barrel 9 are connected sequentially by threads. The ChatGPT module is integrated into the measurement while drilling system 2. The ChatGPT module transmits data to the measurement while drilling system 2 and then transmits the data to the surface via the measurement while drilling system 2.

[0041] Note: Screw drill string 5 is a type of bottom hole power drill string, whose main function is to provide power for the rotation of the drill bit. Bottom hole power drill strings are a part of the drilling tools (bottom hole drilling tools).

[0042] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An intelligent directional coring system, characterized in that: include: The system comprises an intelligent decision-making system, an execution mechanism, a dynamic measurement system, and a monitoring system. The dynamic measurement system measures drilling parameters, trajectory parameters, bottom hole engineering parameters, and directional coring parameters, and feeds the measured parameters back to the monitoring system. The monitoring system processes the dynamic measurement parameters and inputs them into the intelligent decision-making system. The intelligent decision-making system comprehensively judges each measurement parameter and intelligently controls the execution mechanism to perform corresponding operations based on the judgment results. The dynamic measurement system includes a rangefinder and strain gauges. The rangefinder is installed at the upper end of the coring tube inside the drill string to measure the length of the core entering the coring tube. The strain gauges are installed on the inner wall near the upper end of the coring tube to monitor stress changes during coring in the directional drilling section. The data collected by the rangefinder and strain gauges are transmitted to the monitoring system, which then sends the data to the intelligent decision-making system. A core orientation cutter is installed at the lower end of the coring tube to mark the core, facilitating core orientation after core acquisition.

2. The intelligent directional coring system according to claim 1, characterized in that: The intelligent decision-making system is used to determine whether the measured parameters are within the safe range. If they exceed the safety limit, it promptly sends an alarm signal to the wellhead operator, reminding the drilling personnel to bring the bottom hole drill string to the surface for maintenance. If the bottom hole drill string is in good working condition, the actual drilling trajectory parameters are first compared with the designed trajectory parameters. If the error between the two is within the allowable range, no drilling trajectory adjustment is required. At this time, the actuator is controlled to carry out directional coring operations. If the actual drilling trajectory parameters deviate significantly from the designed trajectory parameters, exceeding the design allowable error range, the drilling trajectory needs to be adjusted through the actuator.

3. The intelligent directional coring system according to claim 1, characterized in that: The directional coring parameters include core entry length, core orientation markers, formation resistivity, and core tube stress.

4. The intelligent directional coring system according to claim 1, characterized in that: When the directional coring parameters are abnormal, the intelligent decision-making system autonomously plans the drilling trajectory to obtain more core samples from the abnormal formation.

5. The intelligent directional coring system according to claim 1, characterized in that: The intelligent decision-making system includes a ChatGPT module. Before going downhole, manual instructions are input to the ChatGPT module via an interface. The input content includes at least the drilling design trajectory and the safe range of each measurement parameter.

6. The intelligent directional coring system according to claim 1, characterized in that: The dynamic measurement system includes a temperature sensor, a pressure sensor, a vibration accelerometer, a torque sensor, a rotation speed sensor, and a resistivity measurement probe installed on the core bit at the bottom of the drill string. The temperature sensor, pressure sensor, vibration accelerometer, torque sensor, and rotation speed sensor are used to monitor the working condition of the core bit at the bottom of the well. The resistivity measurement probe is used to measure the resistivity of the formation in real time, which facilitates a preliminary judgment of the formation lithology. The data collected by the temperature sensor, pressure sensor, vibration accelerometer, torque sensor, rotation speed sensor, and resistivity measurement probe are collected in the monitoring system, and the monitoring system sends the data to the intelligent decision-making system.

7. The intelligent directional coring system according to claim 1, characterized in that: The actuators include a winch, a bottom hole power drill, and a top drive.

8. The intelligent directional coring system according to claim 5, characterized in that: The ChatGPT module is integrated into the measurement while drilling system. The ChatGPT module transmits data to the measurement while drilling system and then transmits the data to the surface via the measurement while drilling system.

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