Intelligent hydraulic steering well drilling method and system

Abstract

The invention discloses an intelligent hydraulic steering drilling system and method. The system comprises a high-precision measuring system, an intelligent control system, a hydraulic vehicle and an omnibearing hydraulic steering mechanism, the high-precision measurement system is used for acquiring measurement while drilling data and transmitting the measurement while drilling data to the intelligent control system; the intelligent control system is used for receiving and analyzing the measurement while drilling data, and if the data exceed a working threshold value, a first control signal is sent to the hydraulic vehicle; the posture of the drill bit is monitored in real time, and if the posture of the drill bit deviates, a second control signal is sent to the omni-directional hydraulic steering mechanism; the hydraulic vehicle receives the first control signal and transmits high-pressure liquid to the underground; and the all-directional hydraulic steering mechanism receives the second control signal, opens a corresponding nozzle and sprays high-pressure liquid, adjusts the posture of the drill bit and controls the drill bit to complete steering. The whole drilling process can be intelligently controlled, control signals are processed and transmitted in time, the drilling track of a drill bit is intelligently controlled, and well resources are effectively utilized and activated.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling, and in particular to an intelligent hydraulic steering drilling method and system. Background Art

[0002] At present, coalbed methane development has begun to take shape, but the output of single wells is low and the benefits are not ideal. Among the existing coalbed methane wells, 35% of the put into production wells have a daily gas production lower than the average single well daily gas production. The annual production of ground coalbed methane is low, less than 3% of the natural gas production. The economic feasibility of coalbed methane development has become the main factor restricting the further expansion of coalbed methane. On the other hand, the number of low-yield coalbed methane wells and abandoned coal mine wells increases year by year, and the amount of residual coalbed methane resources is large. Coalbed methane development faces the difficult problem of stabilizing growth and reducing investment.

[0003] The number of shale oil and shale gas wells and production have increased rapidly, but they show the "unconventional" characteristics of rapid initial decline and L-shaped decline curve. The single well has high production in the first 3 or 4 years after commissioning, and then rapidly declines. The estimated ultimate recoverable reserves (EUR) are less than 50%. This has led to the emergence of a large number of low-yield wells. Similarly, shale oil and shale gas development also faces the problem of stabilizing growth and reducing investment.

[0004] In the above context, accurate and efficient implementation of the transformation of low-yield wells and abandoned wells in coal reservoirs and shale reservoirs can significantly reduce drilling costs. The transformation of existing low-yield wells and abandoned wells is generally achieved by using old well side drilling technology and radial well technology. Conventional side drilling of old wells uses special tools and processes to open windows in the casing and side drill a certain distance to re-exploit underground oil and gas. Conventional radial well technology is to drill holes in the casing at the location of the oil and gas reservoir, and use a hose with a jet drill bit to drill one or more horizontal wellbores from the opening to the radial direction of the existing well and in different directions of the oil and gas reservoir to achieve further exploitation of oil and gas. Summary of the invention

[0005] The inventors of the present application have found that conventional side drilling of old wells has a long ineffective footage and poor reservoir applicability; conventional radial well technology has a short footage and cannot control the trajectory. Therefore, these two methods are not effective in transforming low-yield wells and abandoned wells in coal reservoirs and shale reservoirs, and cannot accurately and efficiently implement the transformation of low-yield wells and abandoned wells in coal reservoirs and shale reservoirs, and cannot meet the needs of transforming low-yield wells and abandoned wells in coal reservoirs and shale reservoirs to stabilize production and increase production, and improve the production efficiency and economy of single wells.

[0006] In view of the above problems, the present invention is proposed to provide an intelligent hydraulic steering drilling method and system that overcomes the above problems or at least partially solves the above problems.

[0007] In a first aspect, an embodiment of the present invention provides an intelligent hydraulic steerable drilling system, comprising:

[0008] High-precision measurement system, intelligent control system, hydraulic vehicle and omnidirectional hydraulic steering mechanism;

[0009] High-precision measurement system, including different types of high-precision sensors, which are used to monitor the downhole environment in real time, obtain measurement while drilling data, and transmit the measurement while drilling data to the intelligent control system;

[0010] The intelligent control system is used to receive and analyze the measurement while drilling data, and transmit a first control signal to the hydraulic vehicle if a parameter in the measurement while drilling data exceeds a corresponding working threshold; and determine the real-time posture of the downhole drill bit according to the measurement while drilling data, and if it is determined according to the real-time posture that the drill bit position has shifted, determine the number and orientation of nozzles that need to be opened in the omnidirectional hydraulic steering mechanism according to the orientation of the shift, and transmit a second control signal to the omnidirectional hydraulic steering mechanism to control the omnidirectional hydraulic steering mechanism to work so as to adjust the posture of the drill bit;

[0011] A hydraulic vehicle for delivering high-pressure liquid downhole based on a first control signal;

[0012] The omnidirectional hydraulic steering mechanism is used to receive the second control signal transmitted by the intelligent control system, open the corresponding direction and number of nozzles, and control the drill bit to complete the steering.

[0013] In some optional embodiments, the high-precision sensor includes at least one of a drilling pressure sensor, an internal pressure sensor, a torsion drilling sensor, a vibration sensor, and a horizontality and verticality sensor;

[0014] Drilling pressure sensor, used to measure drill bit pressure;

[0015] Internal pressure sensor to measure wellbore pressure during drilling;

[0016] Torsion drill sensor, used to measure the torque of flexible drilling tools;

[0017] Vibration sensor, used to measure the vibration of the drill bit;

[0018] Level and verticality sensors are used to measure the levelness and verticality of the drill bit.

[0019] In some optional embodiments, the intelligent control system includes: a communication module and a repeater;

[0020] A communication module for realizing two-way data transmission, including receiving measurement while drilling data, and transmitting a first control signal to the hydraulic vehicle and a second control signal to the omnidirectional hydraulic steering mechanism;

[0021] The repeater is used to analyze the measurement while drilling data, and if at least one of the drill bit pressure, well wall pressure, drilling tool torque, drill bit vibration, and drill bit horizontality and verticality in the measurement while drilling data exceeds the corresponding working threshold, control the communication module to send the first control signal; and determine the real-time posture of the downhole drill bit according to the measurement while drilling data, if it is determined that the drill bit position has shifted according to the real-time posture, determine the number and orientation of nozzles that need to be opened in the omnidirectional hydraulic steering mechanism according to the orientation of the shift, and the injection strength of each nozzle, control the communication module to send the second control signal, and the omnidirectional hydraulic steering mechanism works to adjust the posture of the drill bit.

[0022] In some optional embodiments, the hydraulic vehicle includes: a water tank, a hydraulic pump;

[0023] The water tank is connected to the derrick through a hydraulic pipeline, and the hydraulic pipeline is connected to the channel between the drill rod and the flexible drilling tool, so as to inject high-pressure liquid into the channel between the drill rod and the flexible drilling tool;

[0024] The hydraulic pump is installed in the hydraulic pipeline and is used to pump the high-pressure liquid in the tank into the hydraulic pipeline.

[0025] In some optional embodiments, an omnidirectional hydraulic steering mechanism includes: an electromagnetically driven control valve and a plurality of nozzles;

[0026] The electromagnetic control valve is used to determine the number and position of the nozzles to be opened and the spraying force of each nozzle based on the second control signal of the intelligent control system, and open the nozzles in the corresponding position;

[0027] The nozzles are evenly distributed around the circumference, and are opened and closed based on the control instructions of the electromagnetic drive control valve. In the open state, the high-pressure liquid is sprayed according to the spray force controlled by the electromagnetic drive control valve.

[0028] In some optional embodiments, the above intelligent hydraulic steering drilling system further includes:

[0029] The engineering vehicle is used to receive and analyze the measurement while drilling data, determine the downhole working conditions based on the measurement while drilling data, and send a third control signal to the hydraulic vehicle based on the downhole working conditions; determine the real-time posture of the downhole drill bit according to the measurement while drilling data, if the drill bit position is determined to have shifted according to the real-time posture, and the intelligent control system does not control the omnidirectional hydraulic steering mechanism to adjust the drill bit posture or the adjustment is not in place, determine the number and orientation of nozzles that need to be opened in the omnidirectional hydraulic steering mechanism according to the direction of the shift, send a fourth control signal to the omnidirectional hydraulic steering mechanism, and control the omnidirectional hydraulic steering mechanism to work to adjust the drill bit posture.

[0030] In some optional embodiments, the engineering vehicle includes: a power supply platform, a human-machine interaction interface, and an industrial computer;

[0031] The power supply platform provides power for the industrial computer;

[0032] Human-computer interaction interface, for staff to perform human-computer interaction operations;

[0033] Industrial computers are used to control the entire system, including sending, receiving and analyzing data, as well as transmitting control signals.

[0034] In some optional embodiments, the above-mentioned intelligent hydraulic steering drilling system further includes: a whipstock and a positioning anchor;

[0035] The positioning anchor is expanded and anchored below the intended drilling location in the wellbore;

[0036] The bevel is fixedly connected to the positioning anchor. The bevel includes a detection device and a power device. The detection device is used to detect the orientation of the bevel in the well. The power device is used to control the bevel based on the orientation detected by the detection device so that its inclined surface turns to the direction of the intended drilling.

[0037] In a second aspect, an embodiment of the present invention provides an intelligent hydraulic steerable drilling method, which is implemented by the above-mentioned intelligent hydraulic steerable drilling system, including:

[0038] The high-precision sensors of the high-precision measurement system in the intelligent hydraulic steering drilling system monitor the downhole environment in real time, obtain the measurement while drilling data, and transmit the measurement while drilling data to the intelligent control system;

[0039] The intelligent control system in the intelligent hydraulic steerable drilling system receives and analyzes the measurement while drilling data. If the parameters in the measurement while drilling data exceed the corresponding working threshold, a first control signal is transmitted to the hydraulic vehicle; and the real-time posture of the downhole drill bit is determined according to the measurement while drilling data. If the drill bit position is determined to have shifted according to the real-time posture, the number and orientation of the nozzles to be opened in the omnidirectional hydraulic steering mechanism are determined according to the orientation of the shift, and a second control signal is transmitted to the omnidirectional hydraulic steering mechanism.

[0040] The hydraulic vehicle in the intelligent hydraulic steering drilling system receives the first control signal and transmits high-pressure liquid to the well through the hydraulic pipeline;

[0041] The omnidirectional hydraulic steering mechanism in the intelligent hydraulic steering drilling system receives the second control signal, opens the corresponding orientation and number of nozzles, and controls the drill bit to complete the steering.

[0042] In some optional embodiments, the high-precision sensor monitors the downhole environment in real time and obtains the measurement while drilling data, including: monitoring and obtaining at least one of the following measurement while drilling data in real time:

[0043] The drilling pressure sensor measures and obtains the drill bit pressure;

[0044] The internal pressure sensor measures and obtains the wellbore pressure during drilling;

[0045] The torsion drill sensor measures and obtains the torque of the flexible drill;

[0046] The vibration sensor measures and obtains the vibration of the drill bit;

[0047] The level and verticality sensor measures and acquires the levelness and verticality of the drill head.

[0048] In some optional embodiments, the intelligent control system receives and analyzes the measurement while drilling data, and if a parameter in the measurement while drilling data exceeds a corresponding working threshold, transmits a first control signal to the hydraulic vehicle, including:

[0049] The intelligent control system receives and analyzes the measurement while drilling data. If at least one of the drill bit pressure, well wall pressure, drilling tool torque, drill bit vibration, and horizontality and verticality of the drill bit in the measurement while drilling data exceeds a corresponding working threshold, a first control signal is transmitted to the hydraulic vehicle; accordingly,

[0050] The hydraulic vehicle receives the first control signal and transmits high-pressure liquid to the well through the hydraulic pipeline, including:

[0051] After receiving the first control signal, the hydraulic vehicle turns on the hydraulic pump, pumps high-pressure liquid into the hydraulic pipeline of the hydraulic vehicle, and transmits the high-pressure liquid to the well through the hydraulic pipeline in the drill pipe and the flexible drilling tool.

[0052] In some optional embodiments, the real-time posture of the downhole drill bit is determined according to the measurement while drilling data. If the drill bit position is determined to be offset according to the real-time posture, the number and orientation of nozzles to be opened in the omnidirectional hydraulic steering mechanism are determined according to the orientation of the offset, and a second control signal is transmitted to the omnidirectional hydraulic steering mechanism, including:

[0053] The intelligent hydraulic steering drilling system determines the horizontality and verticality of the downhole drill bit according to the horizontality and verticality sensors, determines the real-time posture of the drill bit, and if the drill bit position is determined to be offset according to the real-time posture, determines the adjustment direction of the drill bit according to the offset direction, determines at least one nozzle on the same side of the adjustment direction as the nozzle to be opened and the injection strength of each nozzle in the omnidirectional hydraulic steering mechanism according to the adjustment direction, and transmits a second control signal including the number of nozzles to be opened, the orientation and the injection strength to the omnidirectional hydraulic steering mechanism; accordingly,

[0054] The omnidirectional hydraulic steering mechanism receives the second control signal, opens the corresponding position and number of nozzles, and controls the drill bit to complete the steering, including:

[0055] After receiving the second control signal, the omnidirectional hydraulic steering mechanism opens the corresponding nozzle according to the number, orientation and injection force of the nozzles included in the second control signal, and controls the nozzle to spray high-pressure liquid with the injection force to adjust the posture of the drill bit and control the drill bit to complete the steering.

[0056] In some optional embodiments, the intelligent hydraulic steering drilling method further includes:

[0057] The whipstock and the positioning anchor are lowered to the drilling position of the current horizontal well through the drill pipe;

[0058] The power device in the whipstock controls the whipstock to rotate to the intended drilling direction according to the orientation of the whipstock in the well detected by the detection device;

[0059] The intelligent hydraulic steering drilling system is lowered into the well through the drill pipe to the whipstock, and the intelligent hydraulic steering drilling system is guided by the inclined surface of the whipstock, so that the intelligent hydraulic steering drilling system turns and drills in the intended drilling direction.

[0060] In some optional embodiments, the above method further includes:

[0061] After the drilling of the current horizontal well is completed, the intelligent hydraulic steering drilling system is retrieved through the drill pipe, the drill pipe is re-lowered to connect with the whipstock and the positioning anchor, and the whipstock and the positioning anchor are moved to the drilling position of the next horizontal well.

[0062] In some optional embodiments, the above method further includes:

[0063] The high-precision measurement system transmits the measurement while drilling data to the engineering vehicle;

[0064] The engineering vehicle receives and analyzes the measurement while drilling data, determines the downhole working conditions based on the measurement while drilling data, and sends a third control signal to the hydraulic vehicle based on the downhole working conditions; determines the real-time posture of the downhole drill bit based on the measurement while drilling data, if the drill bit position is determined to have shifted based on the real-time posture, and the intelligent control system does not control the omnidirectional hydraulic steering mechanism to adjust the drill bit posture or adjusts it inadequately, determines the number and orientation of nozzles that need to be opened in the omnidirectional hydraulic steering mechanism based on the orientation of the shift, and sends a fourth control signal to the omnidirectional hydraulic steering mechanism;

[0065] The hydraulic vehicle receives the third control signal and transmits high-pressure liquid to the well through the hydraulic pipeline;

[0066] The omnidirectional hydraulic steering mechanism receives the fourth control signal, opens the nozzles in corresponding directions and quantities, and controls the drill bit to complete the steering.

[0067] The beneficial effects of the above technical solution provided by the embodiment of the present invention include at least:

[0068] The present invention discloses an intelligent hydraulic steering drilling system and method. The system monitors the downhole environment in real time through a high-precision sensor in a high-precision measurement system, obtains measurement data while drilling, and transmits the measurement data while drilling to an intelligent control system. The intelligent control system determines whether a parameter in the measurement data exceeds a corresponding working threshold value according to the measurement data while drilling, and notifies a hydraulic vehicle to adjust the parameter in time through a first control signal when the working threshold value is exceeded. The system also determines the real-time posture of a downhole drill bit according to the measurement data while drilling, and if it is determined that the drill bit position has shifted according to the real-time posture, controls an omnidirectional hydraulic steering mechanism to open nozzles in corresponding positions and quantities according to the shifted position, and controls the drill bit to change its trajectory or steering, so as to ensure that the drilling direction does not shift and drills along a predetermined drilling direction. The system uses hydraulic guidance instead of screw and push block guidance and is no longer limited by the size of the screw and the structure of the push block. It solves the problems of long ineffective footage of sidetracking in conventional old wells, poor reservoir adaptability, short technical footage of drill pipe radial wells and poor control of drilling trajectory. It can intelligently control the entire drilling process, monitor the downhole environment in real time, obtain measurement while drilling data, and control signals for timely processing and transmission to achieve intelligent control of the drilling trajectory of the drill bit. It has the dual advantages of small curvature radial wells and rotary drilling, effectively utilizes unused reserves, activates well resources, accurately and efficiently implements the transformation of low-yield wells and abandoned wells in coal reservoirs and shale reservoirs, and improves the production efficiency and economy of single wells.

[0069] 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 written description, claims, and drawings.

[0070] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] 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:

[0072] Figure 1 This is a schematic diagram of the structure of an intelligent hydraulic steerable drilling system in Embodiment 1 of the present invention;

[0073] Figure 2 This is a specific structural example diagram of the intelligent hydraulic steerable drilling system in the first embodiment of the present invention;

[0074] Figure 3 This is a flow chart of the intelligent hydraulic steering drilling method in the second embodiment of the present invention;

[0075] Figure 4This is a flow chart of the intelligent hydraulic steerable drilling method in Embodiment 3 of the present invention;

[0076] Figure 5 This is a schematic diagram of the hydraulic guidance control principle in the third embodiment of the present invention;

[0077] Figure 6 Schematic diagram of the nozzle structure in the omnidirectional hydraulic steering mechanism in the fourth embodiment of the present invention.

[0078] Marking Description:

[0079] 1-derrick, 2-engineering vehicle, 201-power supply platform, 202-human-machine interface, 203-industrial computer, 3-drill pipe, 4-whipstock, 5-positioning anchor, 6-flexible drilling tool, 7-drill bit, 8-omnidirectional hydraulic steering mechanism, 801-electromagnetic drive control valve, 802-nozzle, 802-1-nozzle I, 802-2-nozzle II, 802-3-nozzle III, 802-4-nozzle IV, 802-5-nozzle V, 802-6-nozzle VI, 8 02-7-Nozzle VII, 802-8-Nozzle VIII, 9-Intelligent control system, 901-Downhole low-power wireless signal repeater, 902-Long-distance high-fidelity two-way communication module, 10-High-precision measurement system, 1001-Drilling pressure sensor, 1002-Internal pressure sensor, 1003-Torsion drill sensor, 1004-Vibration sensor, 1005-Horizontal and vertical sensor, 11-Hydraulic vehicle, 1101-High-power hydraulic pump, 1102-Water tank. DETAILED DESCRIPTION

[0080] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0081] In order to solve the problems of long invalid footage and poor reservoir applicability of conventional old well side drilling in the prior art, short footage and uncontrollable trajectory of radial well technology, the embodiment of the present invention provides an intelligent hydraulic steering drilling system and method, which uses hydraulic steering to replace screw / push block steering, and intelligent control to replace manual adjustment, monitors the downhole environment in real time, obtains measurement while drilling data, and analyzes the measurement while drilling data in real time. If the parameters of the measurement while drilling data exceed the corresponding working threshold, the intelligent control system sends a control signal to the corresponding actuator to realize intelligent control of the drilling trajectory of the drill bit. It has the dual advantages of small curvature radial wells and rotary drilling, realizes the effective use of unused reserves, activates well resources, accurately and efficiently implements the transformation of low-yield wells and abandoned wells in coal reservoirs and shale reservoirs, and improves the production efficiency and economy of single wells.

[0082] Embodiment 1

[0083] Embodiment 1 of the present invention provides an intelligent hydraulic steering drilling system, the system structure of which is as follows: Figure 1 As shown, a specific structural example of the intelligent hydraulic steering drilling system is shown in Figure 2 As shown, the system includes:

[0084] The high-precision measurement system 10 includes different types of high-precision sensors, which are used to monitor the downhole environment in real time, obtain measurement while drilling data, and transmit the measurement while drilling data to the intelligent control system.

[0085] The intelligent control system 9 is used to receive and analyze the measurement while drilling data. If the parameters in the measurement while drilling data exceed the corresponding working threshold, a first control signal is transmitted to the hydraulic vehicle; and the real-time posture of the downhole drill bit 7 is determined according to the measurement while drilling data. If it is determined according to the real-time posture that the drill bit position has shifted, the number and orientation of the nozzles that need to be opened in the omnidirectional hydraulic steering mechanism are determined according to the orientation of the shift, and a second control signal is transmitted to the omnidirectional hydraulic steering mechanism to control the operation of the omnidirectional hydraulic steering mechanism to adjust the posture of the drill bit.

[0086] The hydraulic vehicle 11 is used to transmit high-pressure liquid to the well based on the first control signal.

[0087] The omnidirectional hydraulic steering mechanism 8 is used to receive the second control signal transmitted by the intelligent control system, open the corresponding direction and number of nozzles, and control the drill bit to complete the steering.

[0088] Optionally, the omnidirectional hydraulic steering mechanism 8, the intelligent control system 9, and the high-precision measuring system 10 are connected via wireless short-distance transmission; the drill bit 7, the omnidirectional hydraulic steering mechanism 8, the intelligent control system 9, and the high-precision measuring system 10 are electrically connected to the flexible drilling tool 6. The flexible drilling tool 6 is composed of a plurality of hinged pipe sections, and the plurality of pipe sections are connected together via column keys to realize the transmission of torque between each other, so that the flexible drilling tool can be deflected by a certain angle in the direction of the column keys.

[0089] Optionally, the system also includes an engineering vehicle 2, which is used to receive and analyze measurement while drilling data, determine the downhole working conditions based on the measurement while drilling data, and send a third control signal to the hydraulic vehicle based on the downhole working conditions; determine the real-time posture of the downhole drill bit according to the measurement while drilling data, if the drill bit position is determined to have shifted according to the real-time posture, and the intelligent control system does not control the omnidirectional hydraulic steering mechanism to adjust the drill bit posture or fails to adjust it in place, determine the number and orientation of nozzles that need to be opened in the omnidirectional hydraulic steering mechanism according to the orientation of the offset, and send a fourth control signal to the omnidirectional hydraulic steering mechanism to control the omnidirectional hydraulic steering mechanism to work to adjust the drill bit posture.

[0090] Optionally, the above system further comprises a whipstock 4 and a positioning anchor 5, wherein:

[0091] The positioning anchor is expanded and anchored below the intended drilling location in the wellbore;

[0092] The whipstock is fixedly connected to the positioning anchor, and the whipstock includes a detection device and a power device. The detection device is used to detect the orientation of the whipstock in the well, and the power device is used to control the whipstock based on the orientation detected by the detection device so that its inclined surface turns to the intended drilling direction. The detection device can be a gyroscope or other detection equipment, and the power device can be a motor.

[0093] See also Figure 2 As shown, taking a horizontal well in a multi-branch horizontal well as an example, a preferred structure of the above system includes a derrick, an engineering vehicle, a drill pipe, a whipstock, a positioning anchor, a flexible drilling tool, a drill bit, an omnidirectional hydraulic steering mechanism, an intelligent control system, a high-precision measurement system and a hydraulic vehicle. The derrick 1 is fixedly connected to the ground, the engineering vehicle 2 is connected to the derrick 1 by radio electromagnetic waves through an industrial computer, the hydraulic vehicle 11 is connected to the derrick 1 through a hydraulic pipeline, the drill pipe 3 and the flexible drilling tool 6 are provided with a channel for installing cables and hydraulic pipelines, the derrick 1 and the flexible drilling tool 6 are connected through the drill pipe 3, the whipstock 4 is fixedly connected to the positioning anchor 5, the inclined surface of the whipstock 4 faces the direction of the intended drilling, and when working, the positioning anchor 5 is expanded and anchored on the wall surface of the well, located below the intended drilling position in the wellbore, the flexible drilling tool 6 is electrically connected to the drill bit 7, the omnidirectional hydraulic steering mechanism 8, the intelligent control system 9, and the high-precision measurement system 10, and the omnidirectional hydraulic steering mechanism 8, the intelligent control system 9, and the high-precision measurement system 10 are connected through wireless short transmission.

[0094] Optionally, the high-precision sensor in the high-precision measurement system 10 includes at least one of a drilling pressure sensor 1001, an internal pressure sensor 1002, a torsion drilling sensor 1003, a vibration sensor 1004, and a horizontality and verticality sensor 1005. Among them:

[0095] Drilling pressure sensor, used to measure drill bit pressure;

[0096] Internal pressure sensor to measure wellbore pressure during drilling;

[0097] Torsion drill sensor, used to measure the torque of flexible drilling tools;

[0098] Vibration sensor, used to measure the vibration of the drill bit;

[0099] Level and verticality sensors are used to measure the levelness and verticality of the drill bit.

[0100] The high-precision measurement system uses various high-precision sensors to complete high-precision measurement of wellbore trajectory and transmits real-time data to the intelligent control system, realizing the interconnection and intelligent control of downhole tools.

[0101] Optionally, the intelligent control system 9 includes a communication module and a repeater, wherein:

[0102] A communication module for realizing two-way data transmission, including receiving measurement while drilling data, and transmitting a first control signal to the hydraulic vehicle and a second control signal to the omnidirectional hydraulic steering mechanism;

[0103] The repeater is used to analyze the measurement while drilling data, and if at least one of the drill bit pressure, well wall pressure, drilling tool torque, drill bit vibration, and drill bit horizontality and verticality in the measurement while drilling data exceeds the corresponding working threshold, control the communication module to send the first control signal; and determine the real-time posture of the downhole drill bit according to the measurement while drilling data, if it is determined that the drill bit position has shifted according to the real-time posture, determine the number and orientation of nozzles that need to be opened in the omnidirectional hydraulic steering mechanism according to the orientation of the shift, and the injection strength of each nozzle, control the communication module to send the second control signal, and the omnidirectional hydraulic steering mechanism works to adjust the posture of the drill bit.

[0104] Different parameters in the measurement while drilling data can be set with different working thresholds. When different parameters exceed the thresholds, the corresponding first control signal sent can carry information about the parameters exceeding the working thresholds, such as parameter identification, parameter value, excess amount, etc. The hydraulic vehicle can determine the injection parameters of the high-pressure liquid based on the information about the parameters exceeding the working thresholds, such as injection volume, injection speed, injection pressure, etc.

[0105] The above repeater can be used Figure 1 The underground low power wireless signal repeater 901, the above communication module can be used Figure 1 Medium and long distance high fidelity two-way communication module 902. Through the underground low power wireless signal repeater and the long distance high fidelity two-way communication module, two-way communication can be completed in deep wells, underground data analysis can be performed, and control signals can be transmitted to the hydraulic vehicle and the omnidirectional hydraulic steering mechanism.

[0106] Optionally, the hydraulic vehicle 11 is connected to the derrick 1 through a hydraulic pipeline, and includes a water tank 1102 and a hydraulic pump, wherein:

[0107] The water tank is connected to the derrick 1 through a hydraulic pipeline, and the hydraulic pipeline is connected to the channel between the drill rod and the flexible drilling tool, so as to inject high-pressure liquid into the channel between the drill rod 3 and the flexible drilling tool 6;

[0108] A hydraulic pump, installed in the hydraulic pipeline, is used to pump the high-pressure liquid in the water tank into the hydraulic pipeline;

[0109] The high-pressure liquid in the present invention refers to a pressurized liquid to which a rated pressure is applied by a hydraulic pump, and the rated pressure can be selected according to actual needs.

[0110] The above hydraulic pump can be used Figure 1 Medium to high power hydraulic pump 1101, high power means that the power is greater than a set power threshold, and the power threshold can be determined according to the drilling requirements.

[0111] Optionally, the omnidirectional hydraulic steering mechanism 8 includes an electromagnetically driven control valve and a plurality of nozzles, wherein:

[0112] The electromagnetic control valve is used to determine the number and position of the nozzles to be opened and the spraying force of each nozzle based on the second control signal of the intelligent control system, and open the nozzles in the corresponding position;

[0113] The nozzles are evenly distributed around the circumference, and are opened and closed based on the control instructions of the electromagnetic drive control valve. In the open state, the high-pressure liquid is sprayed according to the spray force controlled by the electromagnetic drive control valve.

[0114] The high-pressure liquid in this embodiment refers to a pressurized liquid to which a rated pressure is applied by a hydraulic pump, and the rated pressure can be selected according to actual needs.

[0115] The electromagnetically driven control valve in the omnidirectional hydraulic steering mechanism adjusts the opening and closing of the nozzle and the flow rate, etc., to generate a certain magnitude and direction of reverse thrust, and complete the trajectory adjustment of the drill bit in the horizontal well section. In the omnidirectional hydraulic steering mechanism, each nozzle can be set with an outlet switch, such as a valve. By controlling the number of valve openings and the opening degree, the number of nozzles opened and the injection force of each nozzle can be controlled. The number of nozzles opened is different, and the injection force of the nozzle is different, resulting in different directions of the control guide force, so that the drilling trajectory of the drill bit can be adjusted in real time and accurately.

[0116] Optionally, the engineering vehicle 2 is connected to the derrick 1 by wireless electromagnetic waves through an industrial computer, and includes: a power supply platform 201, a human-computer interaction interface 202, and an industrial computer 203;

[0117] The power supply platform provides power for the industrial computer;

[0118] Human-computer interaction interface, for staff to perform human-computer interaction operations;

[0119] The industrial computer is used to realize the control of the entire system, including the sending, receiving and analyzing of data, and the transmission of control signals. The industrial computer can work under the power supply of the power supply platform to receive downhole data information, analyze data information, monitor downhole working conditions, and send work instructions to the downhole through radio electromagnetic wave communication; it can receive and analyze the measurement while drilling data, determine the downhole working conditions based on the measurement while drilling data, and send a third control signal to the hydraulic vehicle based on the downhole working conditions; determine the real-time posture of the downhole drill bit according to the measurement while drilling data, if the drill bit position is determined to have shifted according to the real-time posture, and the intelligent control system does not control the omnidirectional hydraulic steering mechanism to adjust the drill bit posture or adjust it in place, determine the number and orientation of the nozzles that need to be opened in the omnidirectional hydraulic steering mechanism according to the offset orientation, send a fourth control signal to the omnidirectional hydraulic steering mechanism, and control the omnidirectional hydraulic steering mechanism to work to adjust the drill bit posture.

[0120] When working in complex formations or encountering extreme conditions underground, manual operations can be performed through the human-machine interface of the engineering vehicle to control the trajectory adjustment in order to compensate for the failure of automatic control adjustment or other malfunctions that may cause inadequate adjustment, making trajectory control more precise.

[0121] The above-mentioned radial horizontal well intelligent hydraulic steering drilling system provided by the present invention is suitable for the precise transformation of old wells. It uses hydraulic steering to replace the screw / push block steering, solves the problems of long invalid footage of conventional side drilling of old wells, poor reservoir applicability, and short technical footage of drill pipe radial wells, and accurately and efficiently implements the transformation of low-yield wells and abandoned wells in coal reservoirs and shale reservoirs. The intelligent control system and high-precision measurement system can adapt to the harsh underground environment of high temperature and high pressure, can monitor the underground environment in real time, can control the signal for timely processing and transmission, and realize the control trajectory.

[0122] Embodiment 2

[0123] Embodiment 2 of the present invention provides an intelligent hydraulic steering drilling method, which is implemented by an intelligent hydraulic steering drilling system. The process is as follows: Figure 3 As shown, the following steps are included:

[0124] Step S101: The high-precision sensors of the high-precision measurement system monitor the downhole environment in real time, obtain measurement while drilling data, and transmit the measurement while drilling data to the intelligent control system.

[0125] The high-precision sensor monitors and obtains at least one of the following measurement while drilling data in real time: the drilling pressure sensor measures and obtains the drill bit pressure; the internal pressure sensor measures and obtains the wellbore pressure during the drilling process; the torsion drill sensor measures and obtains the torque of the flexible drilling tool; the vibration sensor measures and obtains the vibration of the drill bit; the horizontality and verticality sensor measures and obtains the horizontality and verticality of the drill bit.

[0126] The high-precision measurement system uses various high-precision sensors to complete high-precision measurement of wellbore trajectory and transmits real-time data to the intelligent control system, realizing the interconnection and intelligent control of downhole tools.

[0127] Step S102: the intelligent control system receives and analyzes the measurement while drilling data to determine whether a parameter in the measurement while drilling data exceeds a corresponding working threshold value. If so, execute S103; otherwise, execute S102.

[0128] The intelligent control system receives and analyzes the measurement while drilling data transmitted by the high-precision measurement system, and determines whether at least one of the drill bit pressure, well wall pressure, drilling tool torque, drill bit vibration, and drill bit horizontality and verticality in the measurement while drilling data exceeds the corresponding working threshold. If it exceeds the corresponding working threshold, S103 is executed; if it does not exceed the corresponding working threshold, it continues to determine whether the parameters in the measurement while drilling data exceed the corresponding working threshold.

[0129] Step S103: Transmitting a first control signal to the hydraulic vehicle.

[0130] If the intelligent control system determines that at least one of the drill bit pressure, well wall pressure, drilling tool torque, drill bit vibration, and drill bit horizontality and verticality in the while drilling measurement data exceeds the corresponding working threshold, a first control signal is transmitted to the hydraulic vehicle.

[0131] Step S104: the intelligent control system determines the real-time posture of the downhole drill bit according to the measurement while drilling data, and determines whether the drill bit position has shifted according to the real-time posture. If so, execute S105, otherwise execute S104.

[0132] The intelligent hydraulic steerable drilling system determines the horizontality and verticality of the downhole drill bit according to the horizontality and verticality sensors, determines the real-time posture of the drill bit according to the horizontality and verticality of the drill bit, and determines whether the drill bit position has shifted according to the real-time posture. If the drill bit position has shifted, S105 is executed; if the drill bit position has not shifted, the real-time posture of the downhole drill bit continues to be monitored to determine whether the real-time posture of the drill bit has shifted.

[0133] Step S105: The intelligent control system determines the number and orientation of nozzles that need to be opened in the omnidirectional hydraulic steering mechanism according to the offset orientation, and transmits a second control signal to the omnidirectional hydraulic steering mechanism.

[0134] The intelligent control system determines that the drill bit position has shifted based on the real-time posture, and determines the adjustment direction of the drill bit based on the direction of the shift, determines at least one nozzle on the same side of the adjustment direction in the omnidirectional hydraulic steering mechanism as the nozzle that needs to be opened and the injection intensity of each nozzle based on the adjustment direction, and transmits a second control signal including the number of nozzles that need to be opened, the direction and the injection intensity to the omnidirectional hydraulic steering mechanism.

[0135] Step S106: The hydraulic vehicle receives the first control signal and transmits high-pressure liquid to the well through the hydraulic pipeline.

[0136] After receiving the first control signal, the hydraulic vehicle turns on the hydraulic pump, pumps high-pressure liquid into the hydraulic pipeline of the hydraulic vehicle, and transmits the high-pressure liquid to the well through the hydraulic pipeline in the drill pipe and the flexible drilling tool.

[0137] The high-pressure liquid in this embodiment refers to a pressurized liquid to which a rated pressure is applied by a hydraulic pump, and the rated pressure can be selected according to actual needs.

[0138] The hydraulic pump may be a high-power hydraulic pump. High power means that the power is greater than a set power threshold. The power threshold may be determined according to drilling requirements.

[0139] Step S107: The omnidirectional hydraulic steering mechanism receives the second control signal, opens the corresponding orientation and number of nozzles, and controls the drill bit to complete the steering.

[0140] After the omnidirectional hydraulic steering mechanism receives the second control signal, the electromagnetically driven control valve determines the number and position of the nozzles to be opened and the injection force of each nozzle based on the second control signal of the intelligent control system, and opens the nozzles in the corresponding positions. The nozzles are opened and closed based on the control instructions of the electromagnetically driven control valve. In the open state, the high-pressure liquid is sprayed according to the injection force controlled by the electromagnetically driven control valve, the direction of the guide force is regulated, the posture of the drill bit is adjusted, and the drill bit is controlled to complete the steering.

[0141] The number and arrangement of nozzles in the omnidirectional hydraulic steering mechanism can be determined according to actual working conditions, and omnidirectional hydraulic guidance can be performed to achieve adjustment of the drilling trajectory of the drill bit.

[0142] The flexible drill tool is connected to the drill bit. The flexible drill tool is composed of multiple hinged pipe sections. The multiple pipe sections are connected together by column keys, which can realize the transmission of torque between each other. When the nozzle sprays out high-pressure liquid, it will be affected by the guide force. The guide force causes the drill bit to twist, and at the same time drives the flexible drill tool to twist, causing it to deflect a certain angle in the direction of the column key. The flexible drill tool cooperates with the drill bit to adjust the drill bit's posture, control the drill bit to complete the turn, and continue to drill forward.

[0143] In the above method of this embodiment, the high-precision measurement system transmits the measurement data while drilling to the intelligent control system in real time. The intelligent control system receives the measurement data while drilling, analyzes and finds that at least one parameter in the measurement data while drilling exceeds the corresponding working threshold, and can timely transmit control signals to the hydraulic vehicle and the omnidirectional hydraulic steering mechanism. At the same time, the intelligent control system can control the outlet switch of the nozzle in the omnidirectional hydraulic steering mechanism underground, adjust the direction of the guiding force, and realize the drilling trajectory control. Compared with the traditional control method, the intelligent hydraulic steering drilling method uses an intelligent control system, which can automatically perform data analysis underground and control the omnidirectional hydraulic steering mechanism without the need for operation of the control platform on the well, simplifying the control path and shortening the control time.

[0144] Embodiment 3

[0145] Embodiment 3 of the present invention provides a specific implementation process of an intelligent hydraulic steering drilling method, the process of which is as follows: Figure 4 As shown, the following steps are included:

[0146] Step S201: lowering the whipstock and the positioning anchor to the drilling position of the current horizontal well through the drill pipe.

[0147] The whipstock is fixedly connected to the positioning anchor, and the whipstock and the positioning anchor are lowered to the drilling position of the current horizontal well to be drilled through the drill pipe. The positioning anchor is expanded and anchored below the drilling position in the wellbore to play a fixing role. The well to be drilled can be an old well to be renovated.

[0148] Step S202: The power device in the whipstock controls the whipstock to rotate to the intended drilling direction according to the orientation of the whipstock in the well detected by the detection device.

[0149] After anchoring below the intended drilling location, the detection device in the whipstock detects the orientation of the whipstock in the well, and the power device in the whipstock controls the whipstock to rotate according to the orientation data detected by the detection device, so that its inclined surface faces the orientation of the intended drilling location, and the positioning anchor expands to complete the anchoring. The detection device in the whipstock can be a gyroscope, and the power device can be a motor.

[0150] Step S203: lowering the intelligent hydraulic steering drilling system into the well to the whipstock through the drill pipe, guiding the intelligent hydraulic steering drilling system through the inclined surface of the whipstock, so that the intelligent hydraulic steering drilling system turns and drills in the intended drilling direction.

[0151] The intelligent hydraulic steering drilling system is connected to the flexible drilling tool and the drill bit. The flexible drilling tool carries the intelligent hydraulic steering system and the drill bit. The intelligent hydraulic steering drilling system is lowered into the whipstock in the well through the drill pipe. By utilizing the inclined surface guidance of the whipstock and the cooperation of the flexible drilling tool, the intelligent hydraulic steering drilling system and the drill bit can complete the turning of the wellbore trajectory from vertical to horizontal within an ultra-short turning radius. After the turning is completed, the state of the intelligent hydraulic steering drilling system is changed to horizontal drilling and drilling is carried out in the intended drilling direction.

[0152] Compared with traditional sidetracking of old wells, the above method has the advantage of short turning radius and steering drilling, which improves the efficiency of drilling.

[0153] Step S204: The high-precision sensors of the high-precision measurement system monitor the downhole environment in real time, obtain the measurement while drilling data, and transmit the measurement while drilling data to the intelligent control system.

[0154] High-precision sensors measure and obtain at least one of the following data and transmit the data to the intelligent control system:

[0155] The drilling pressure sensor measures and obtains the drill bit pressure;

[0156] The internal pressure sensor measures and obtains the wellbore pressure during drilling;

[0157] The torsion drill sensor measures and obtains the torque of the flexible drill;

[0158] The vibration sensor measures and obtains the vibration of the drill bit;

[0159] The level and verticality sensor measures and acquires the levelness and verticality of the drill head.

[0160] Step S205: the intelligent control system receives and analyzes the measurement while drilling data to determine whether a parameter in the measurement while drilling data exceeds a corresponding working threshold value. If so, execute S206; otherwise, execute S205.

[0161] The intelligent control system determines whether at least one of the drill bit pressure, well wall pressure, drilling tool torque, drill bit vibration, and horizontality and verticality of the drill bit in the while drilling measurement data exceeds the corresponding working threshold. If so, S206 is executed; if not, whether the parameters in the while drilling measurement data exceed the corresponding working threshold is continued to be determined.

[0162] Step S206: Transmitting a first control signal to the hydraulic vehicle.

[0163] If the intelligent control system determines that at least one of the drill bit pressure, well wall pressure, drilling tool torque, drill bit vibration, and drill bit horizontality and verticality in the while drilling measurement data exceeds the corresponding working threshold, a first control signal is transmitted to the hydraulic vehicle.

[0164] Step S207: the intelligent control system determines the real-time posture of the downhole drill bit according to the measurement while drilling data, and determines whether the drill bit position has shifted according to the real-time posture. If so, execute S208, otherwise execute S207.

[0165] The intelligent hydraulic steerable drilling system determines the horizontality and verticality of the downhole drill bit according to the horizontality and verticality sensors, determines the real-time posture of the drill bit according to the horizontality and verticality, and determines whether the drill bit position has shifted according to the real-time posture. If the drill bit position has shifted, execute S208; if the drill bit position has not shifted, continue to monitor the real-time posture of the downhole drill bit to determine whether the real-time posture of the drill bit has shifted.

[0166] Step S208: The intelligent control system determines the number and orientation of nozzles that need to be opened in the omnidirectional hydraulic steering mechanism according to the offset orientation, and transmits a second control signal to the omnidirectional hydraulic steering mechanism.

[0167] The intelligent control system determines that the drill bit position has shifted based on the real-time posture, and determines the adjustment direction of the drill bit based on the direction of the shift, determines at least one nozzle on the same side of the adjustment direction in the omnidirectional hydraulic steering mechanism as the nozzle that needs to be opened and the injection intensity of each nozzle based on the adjustment direction, and transmits a second control signal including the number of nozzles that need to be opened, the direction and the injection intensity to the omnidirectional hydraulic steering mechanism.

[0168] Step S209: The hydraulic vehicle receives the first control signal and transmits high-pressure liquid to the well through the hydraulic pipeline.

[0169] After receiving the first control signal, the hydraulic vehicle turns on the hydraulic pump, pumps high-pressure liquid into the hydraulic pipeline of the hydraulic vehicle, and transmits the high-pressure liquid to the well through the hydraulic pipeline in the drill pipe and the flexible drilling tool.

[0170] The high-pressure liquid in this embodiment refers to a pressurized liquid to which a rated pressure is applied by a hydraulic pump, and the rated pressure can be selected according to actual needs.

[0171] Step S210: The omnidirectional hydraulic steering mechanism receives the second control signal, opens the corresponding orientation and number of nozzles, and controls the drill bit to complete the steering.

[0172] After the omnidirectional hydraulic steering mechanism receives the second control signal, the electromagnetically driven control valve determines the number and position of the nozzles to be opened and the injection force of each nozzle based on the second control signal of the intelligent control system, and opens the nozzles in the corresponding positions. The nozzles are opened and closed based on the control instructions of the electromagnetically driven control valve. In the open state, the high-pressure liquid is sprayed according to the injection force controlled by the electromagnetically driven control valve, the direction of the guide force is regulated, the posture of the drill bit is adjusted, and the drill bit is controlled to complete the steering.

[0173] The number and arrangement of nozzles in the omnidirectional hydraulic steering mechanism can be determined according to actual working conditions, and omnidirectional hydraulic guidance can be performed to achieve adjustment of the drilling trajectory of the drill bit.

[0174] See the schematic diagram of using hydraulic steering to control the drill bit to complete the steering. Figure 5 As shown, the intelligent control system 9 receives and analyzes the data measured by the horizontality and verticality sensor 1005 in the high-precision measurement system. If the data exceeds the working threshold, it is determined that the drill bit position has shifted. At this time, the intelligent control system 9 transmits a second control signal to the omnidirectional hydraulic steering mechanism to control the opening of the electromagnetically driven control valve 801. The electromagnetically driven control valve opens the nozzle controlled by the control valve according to the instruction of the second control signal, sprays high-pressure liquid according to the spray force in the second control signal, adjusts the posture of the drill bit 7, and controls the drill bit 7 to complete the guidance. Figure 5 Reference numeral 802 is one of the multiple nozzles in the omnidirectional hydraulic steering mechanism. Accordingly, the nozzle is also controlled by a corresponding electromagnetically driven valve.

[0175] Based on the same inventive concept, this embodiment also provides an intelligent hydraulic steering drilling method, which includes:

[0176] After the drilling of the current horizontal well is completed, the intelligent hydraulic steering drilling system is retrieved through the drill pipe, and the drill pipe is re-inserted to connect with the whipstock and the positioning anchor, and the whipstock and the positioning anchor are moved to the drilling position of the next horizontal well; and then steps S202 to S210 are executed. After the drilling of a horizontal well is completed, the intelligent hydraulic steering drilling system can be conveniently retrieved and lowered to the next horizontal well to drill the next well, thereby realizing continuous operation of horizontal well drilling.

[0177] In the above method of this embodiment, a bevel and a positioning anchor are lowered into the current horizontal well through a drill pipe, and a power device is used to turn the inclined surface of the bevel to the direction of the intended drilling. Then, the intelligent hydraulic steering drilling system is lowered to the bevel through the drill pipe. The bevel and the flexible drilling tool cooperate to enable the intelligent hydraulic steering system to complete the steering and horizontal drilling. When the intelligent hydraulic steering system is in working condition, the high-precision measurement system transmits the drilling data to the intelligent control system, which receives and analyzes the data. When the data exceeds the working threshold, a first control signal is sent to the hydraulic vehicle. When the drill bit posture deviates, a second control signal is sent to the omnidirectional hydraulic steering mechanism. The hydraulic vehicle receives the first control signal and transmits high-pressure liquid to the wellbore. The omnidirectional hydraulic steering mechanism receives the second control signal, opens the nozzle to spray high-pressure liquid, adjusts the drill bit posture, completes the drill bit steering, and keeps the drill bit posture horizontal and drills forward in the intended drilling direction. This method uses hydraulic guidance instead of screw / push block guidance, solving the problems of long ineffective footage of conventional side drilling in old wells, poor reservoir applicability, and short technical footage of drill pipe radial wells, and accurately and efficiently implements the transformation of low-yield wells and abandoned wells in coal reservoirs and shale reservoirs.

[0178] Embodiment 4

[0179] Embodiment 4 of the present invention provides a nozzle in an omnidirectional hydraulic steering mechanism, the structure of which is as follows: Figure 6 As shown, it includes the following structure:

[0180] The nozzles include: nozzle I 802-1, nozzle II 802-2, nozzle III 802-3, nozzle IV 802-4, nozzle V 802-5, nozzle VI 802-6, nozzle VII 802-7 and nozzle VIII 802-8.

[0181] Optionally, when the drill bit 7 deviates downward, the intelligent control system 9 uses the electromagnetic drive control valve corresponding to the nozzle V802-5 to open the nozzle V802-5, and the nozzle V802-5 sprays high-pressure fluid downward to adjust the drilling trajectory;

[0182] When the drill bit 7 deviates upward, the intelligent control system 9 uses the electromagnetic drive control valve corresponding to the nozzle Ⅰ802-1 to open the nozzle Ⅰ802-1, and the nozzle Ⅰ802-1 sprays high-pressure fluid upward to adjust the drilling trajectory;

[0183] Optionally, when the drill bit 7 deviates to the left, the intelligent control system 9 uses the electromagnetic drive control valve 801 corresponding to the nozzle VII 802 - 7 to open the nozzle VII 802 - 7, and the nozzle VII 802 - 7 sprays high-pressure fluid downward to adjust the drilling trajectory;

[0184] Optionally, when the drill bit 7 deviates to the right, the intelligent control system 9 uses the electromagnetic drive control valve 801 corresponding to the nozzle III 802 - 3 to open the nozzle III 802 - 3, and the nozzle III 802 - 3 sprays high-pressure fluid downward to adjust the drilling trajectory.

[0185] Optionally, when the drill bit 7 deviates in multiple directions, the intelligent control system 9 uses the electromagnetic drive control valve to open multiple nozzles at the same time to adjust the drilling trajectory. For example, when the drill bit 7 deviates to the lower right, the intelligent control system 9 uses the electromagnetic drive control valves corresponding to the multiple nozzles to open nozzle III 802-3, nozzle IV 802-4 and nozzle V 802-5, and nozzle III 802-3, nozzle IV 802-4 and nozzle V 802-5 spray high-pressure fluid to adjust the drilling trajectory.

[0186] The number and arrangement of the nozzles in this embodiment can be determined according to the actual working conditions, and all-round hydraulic guidance can be performed to achieve the adjustment of the drilling trajectory of the drill bit. The specific operation of each nozzle has been described in detail in the embodiment of the method, and will not be elaborated here.

[0187] The above method and system provided by the embodiment of the present invention can complete the wellbore trajectory from vertical to horizontal in an ultra-short turning radius of 10m by using the cooperation of flexible drilling tools and whipstock, realize accurate trajectory control of the horizontal section by hydraulic power through the omnidirectional hydraulic steering mechanism, and realize speed increase by more than 10 times by using intelligent control instead of manual adjustment. It has the dual advantages of short turning radius and fast adjustment, and is a major technical tool for carrying out the transformation of old wells in the future, realizing the effective use of unused reserves, and revitalizing well resources.

[0188] Unless otherwise specifically stated, terms such as processing, computing, calculating, determining, displaying, etc. may refer to the actions and / or processes of one or more processing or computing systems, or similar devices, which operate and convert data represented as physical (e.g., electronic) quantities within registers or memories of a processing system into other data similarly represented as physical quantities within memories, registers, or other such information storage, transmission, or display devices of the processing system. Information and signals may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0189] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0190] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0191] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein can all be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above around their functions. Whether such functions are implemented as hardware or software depends on specific applications and the design constraints imposed on the entire system. A skilled person can implement the described functions in an alternative manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of the present disclosure.

[0192] The steps of the method or algorithm described in conjunction with the embodiments herein may be directly embodied as hardware, a software module executed by a processor, or a combination thereof. The software module may be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a mobile disk, a CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The ASIC may be located in a user terminal. Of course, the processor and the storage medium may also be present in a user terminal as discrete components.

[0193] For software implementation, the techniques described in this application can be implemented with modules (e.g., procedures, functions, etc.) that perform the functions described in this application. These software codes can be stored in a memory unit and executed by a processor. The memory unit can be implemented within the processor or outside the processor. In the latter case, it is coupled to the processor in a communication manner via various means, which are well known in the art.

[0194] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

Claims

1. An intelligent hydraulic steerable drilling system, characterized in that: include: High-precision measurement system, intelligent control system, hydraulic vehicle and omnidirectional hydraulic steering mechanism; The high-precision measurement system includes different types of high-precision sensors, which are used to monitor the downhole environment in real time, obtain measurement while drilling data, and transmit the measurement while drilling data to the intelligent control system; The intelligent control system is used to receive and analyze the measurement while drilling data, and transmit a first control signal to the hydraulic vehicle if a parameter in the measurement while drilling data exceeds a corresponding working threshold; and determining the real-time posture of the downhole drill bit according to the measurement while drilling data; if the drill bit position is determined to be offset according to the real-time posture, determining the number and orientation of nozzles to be opened in the omnidirectional hydraulic steering mechanism according to the orientation of the offset, transmitting a second control signal to the omnidirectional hydraulic steering mechanism, and controlling the omnidirectional hydraulic steering mechanism to work so as to adjust the posture of the drill bit; The hydraulic vehicle is used to deliver high-pressure liquid to the well based on the first control signal; The omnidirectional hydraulic steering mechanism is used to receive the second control signal transmitted by the intelligent control system, open the corresponding orientation and number of nozzles, and control the drill bit to complete the steering.

2. The system according to claim 1, characterized in that The high-precision sensor includes: at least one of a drilling pressure sensor, an internal pressure sensor, a torsion drilling sensor, a vibration sensor, and a horizontality and verticality sensor; The drilling pressure sensor is used to measure the drill bit pressure; The internal pressure sensor is used to measure the wellbore pressure during drilling; The torsion drill sensor is used to measure the torque of the flexible drilling tool; The vibration sensor is used to measure the vibration of the drill bit; The horizontality and verticality sensor is used to measure the horizontality and verticality of the drill bit.

3. The system according to claim 1, characterized in that The intelligent control system comprises: a communication module and a repeater; The communication module is used to realize two-way data transmission, including receiving measurement while drilling data, and transmitting a first control signal to the hydraulic vehicle and a second control signal to the omnidirectional hydraulic steering mechanism; The repeater is used to analyze the measurement while drilling data, and if at least one of the drill bit pressure, well wall pressure, drilling tool torque, drill bit vibration, and drill bit horizontality and verticality in the measurement while drilling data exceeds the corresponding working threshold, control the communication module to send the first control signal; and determine the real-time posture of the downhole drill bit according to the measurement while drilling data, if it is determined that the drill bit position has shifted according to the real-time posture, determine the number and orientation of nozzles that need to be opened in the omnidirectional hydraulic steering mechanism according to the orientation of the shift, and the injection strength of each nozzle, control the communication module to send the second control signal, and the omnidirectional hydraulic steering mechanism works to adjust the posture of the drill bit.

4. The system according to claim 1, characterized in that The hydraulic vehicle comprises: a water tank and a hydraulic pump; The water tank is connected to the derrick through a hydraulic pipeline, and the hydraulic pipeline is connected to the channel between the drill rod and the flexible drilling tool, so as to inject high-pressure liquid into the channel between the drill rod and the flexible drilling tool; The hydraulic pump is installed in the hydraulic pipeline and is used to pump the high-pressure liquid in the water tank into the hydraulic pipeline.

5. The system according to claim 1, characterized in that The omnidirectional hydraulic steering mechanism comprises: an electromagnetically driven control valve and a plurality of nozzles; The electromagnetic control valve is used to determine the number and position of the nozzles to be opened and the spraying force of each nozzle based on the second control signal of the intelligent control system, and open the nozzles in the corresponding position; The nozzles are evenly distributed in the circumferential direction, and are opened and closed based on the control instruction of the electromagnetic drive control valve. In the open state, the nozzles spray high-pressure liquid according to the spraying force controlled by the electromagnetic drive control valve.

6. The system according to claim 1, characterized in that Also includes: The engineering vehicle is used to receive and analyze the measurement while drilling data, determine the downhole working conditions based on the measurement while drilling data, and send a third control signal to the hydraulic vehicle based on the downhole working conditions; The real-time posture of the downhole drill bit is determined according to the measurement while drilling data. If the drill bit position is determined to have shifted according to the real-time posture, and the intelligent control system does not control the omnidirectional hydraulic steering mechanism to adjust the drill bit posture or the adjustment is not in place, the number and orientation of nozzles that need to be opened in the omnidirectional hydraulic steering mechanism are determined according to the orientation of the shift, and a fourth control signal is sent to the omnidirectional hydraulic steering mechanism to control the omnidirectional hydraulic steering mechanism to work so as to adjust the drill bit posture.

7. The system according to claim 6, characterized in that The engineering vehicle includes: power supply platform, human-machine interaction interface, industrial computer; The power supply platform provides power for the industrial computer; The human-computer interaction interface is used by staff to perform human-computer interaction operations; The industrial computer is used to realize the control of the whole system, including the sending, receiving and analyzing of data, and the transmission of control signals.

8. The system according to any one of claims 1 to 7, further comprising: whipstock and anchors; The positioning anchor is expanded and anchored below the intended drilling location in the wellbore; The bevel is fixedly connected to the positioning anchor, and the bevel includes a detection device and a power device. The detection device is used to detect the orientation of the bevel in the well, and the power device is used to control the bevel based on the orientation detected by the detection device so that its inclined surface turns to the direction of the intended drilling.

9. An intelligent hydraulic steering drilling method, characterized in that: This is achieved through an intelligent hydraulic steerable drilling system, including: The high-precision sensors of the high-precision measurement system in the intelligent hydraulic steering drilling system monitor the downhole environment in real time, obtain the measurement while drilling data, and transmit the measurement while drilling data to the intelligent control system; The intelligent control system in the intelligent hydraulic steerable drilling system receives and analyzes the measurement while drilling data, and transmits a first control signal to the hydraulic vehicle if a parameter in the measurement while drilling data exceeds a corresponding working threshold; and determines the real-time posture of the downhole drill bit according to the measurement while drilling data, and if it is determined according to the real-time posture that the drill bit position has shifted, determines the number and orientation of nozzles that need to be opened in the omnidirectional hydraulic steering mechanism according to the orientation of the shift, and transmits a second control signal to the omnidirectional hydraulic steering mechanism; The hydraulic vehicle in the intelligent hydraulic steering drilling system receives the first control signal and transmits high-pressure liquid to the well through the hydraulic pipeline; The omnidirectional hydraulic steering mechanism in the intelligent hydraulic steering drilling system receives the second control signal, opens the corresponding orientation and number of nozzles, and controls the drill bit to complete the steering.

10. The method according to claim 9, characterized in that High-precision sensors monitor the downhole environment in real time and obtain measurement while drilling data, including: real-time monitoring and obtaining at least one of the following measurement while drilling data: The drilling pressure sensor measures and obtains the drill bit pressure; The internal pressure sensor measures and obtains the wellbore pressure during the drilling process; The torsion drill sensor measures and obtains the torque of the flexible drill tool; The vibration sensor measures and obtains the vibration condition of the drill bit; The horizontality and verticality sensor measures and acquires the horizontality and verticality of the drill bit.

11. The method according to claim 9, characterized in that The intelligent control system receives and analyzes the measurement while drilling data, and transmits a first control signal to the hydraulic vehicle if a parameter in the measurement while drilling data exceeds a corresponding working threshold, including: The intelligent control system receives and analyzes the measurement while drilling data. If at least one of the drill bit pressure, well wall pressure, drilling tool torque, drill bit vibration, and horizontality and verticality of the drill bit in the measurement while drilling data exceeds a corresponding working threshold, a first control signal is transmitted to the hydraulic vehicle; accordingly, The hydraulic vehicle receives the first control signal and transmits high-pressure liquid to the well through the hydraulic pipeline, including: After receiving the first control signal, the hydraulic vehicle turns on the hydraulic pump, pumps high-pressure liquid into the hydraulic pipeline of the hydraulic vehicle, and transmits the high-pressure liquid to the well through the hydraulic pipeline in the drill pipe and the flexible drilling tool.

12. The method according to claim 9, characterized in that Determine the real-time posture of the downhole drill bit according to the measurement while drilling data, if the drill bit position is determined to be offset according to the real-time posture, determine the number and orientation of nozzles to be opened in the omnidirectional hydraulic steering mechanism according to the orientation of the offset, and transmit a second control signal to the omnidirectional hydraulic steering mechanism, including: The intelligent hydraulic steering drilling system determines the horizontality and verticality of the downhole drill bit according to the horizontality and verticality sensors, determines the real-time posture of the drill bit, and if the drill bit position is determined to be offset according to the real-time posture, determines the adjustment direction of the drill bit according to the offset direction, determines at least one nozzle on the same side of the adjustment direction as the nozzle to be opened and the injection strength of each nozzle in the omnidirectional hydraulic steering mechanism according to the adjustment direction, and transmits a second control signal including the number of nozzles to be opened, the orientation and the injection strength to the omnidirectional hydraulic steering mechanism; accordingly, The omnidirectional hydraulic steering mechanism receives the second control signal, opens the corresponding position and number of nozzles, and controls the drill bit to complete the steering, including: After receiving the second control signal, the omnidirectional hydraulic steering mechanism opens the corresponding nozzle according to the number, orientation and injection force of the nozzles included in the second control signal, and controls the nozzle to spray high-pressure liquid with the injection force to adjust the posture of the drill bit and control the drill bit to complete the steering.

13. The method according to claim 9, characterized in that Also includes: The whipstock and the positioning anchor are lowered to the drilling position of the current horizontal well through the drill pipe; The power device in the whipstock controls the whipstock to rotate to the intended drilling direction according to the orientation of the whipstock in the well detected by the detection device; The intelligent hydraulic steering drilling system is lowered into the well to the whipstock through the drill pipe, and the intelligent hydraulic steering drilling system is guided by the inclined surface of the whipstock, so that the intelligent hydraulic steering drilling system turns and drills in the intended drilling direction.

14. The method according to claim 13, characterized in that Also includes: After the drilling of the current horizontal well is completed, the intelligent hydraulic steering drilling system is retrieved through the drill pipe, the drill pipe is re-lowered to connect with the whipstock and the positioning anchor, and the whipstock and the positioning anchor are moved to the drilling position of the next horizontal well.

15. The method according to any one of claims 9 to 14, characterized in that: Also includes: The high-precision measurement system transmits the measurement while drilling data to the engineering vehicle; The engineering vehicle receives and analyzes the measurement while drilling data, determines the downhole working conditions based on the measurement while drilling data, and sends a third control signal to the hydraulic vehicle based on the downhole working conditions; determines the real-time posture of the downhole drill bit based on the measurement while drilling data, if the drill bit position is determined to have shifted based on the real-time posture, and the intelligent control system does not control the omnidirectional hydraulic steering mechanism to adjust the drill bit posture or adjusts it inadequately, determines the number and orientation of nozzles that need to be opened in the omnidirectional hydraulic steering mechanism based on the offset orientation, and sends a fourth control signal to the omnidirectional hydraulic steering mechanism; The hydraulic vehicle receives the third control signal and transmits high-pressure liquid to the well through the hydraulic pipeline; The omnidirectional hydraulic steering mechanism receives the fourth control signal, opens the nozzles in corresponding directions and quantities, and controls the drill bit to complete the steering.

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