A pulse generating device and an adaptive rotary guiding system

Abstract

The utility model provides a pulse generating device and an adaptive rotary steering system, which are used to overcome the problems of decoding errors and delays that occur when downhole instructions are uploaded to the ground. The pulse generating device is hung on the rotary steering system to realize the adjustment of pulse frequency and amplitude in the real-time drilling process, and complete the adaptive pulse assisted rock breaking. The pulse generating device comprises a short section body and a pulse generating mechanism arranged in the middle of the short section body, and a through cavity is axially arranged in the short section body; the pulse generating mechanism comprises a pulse mechanism upper plate, a pulse mechanism middle plate and a pulse mechanism lower plate which are arranged in sequence, and the upper, middle and lower plates are provided with multiple types of fan-shaped flow channels for medium to pass through; the pulse mechanism middle plate is fixed in the middle of the through cavity; the pulse mechanism upper plate is connected to an upper driving mechanism and rotates clockwise; the pulse mechanism lower plate is connected to a lower driving mechanism and rotates counterclockwise, so that when the pulse mechanism upper plate and the pulse mechanism lower plate rotate relative to the pulse mechanism middle plate, the pulsating change of mud displacement is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling engineering, in particular to a pulse generating device and an adaptive rotary steering system. Background Art

[0002] Rotary steerable drilling technology is widely used in the current horizontal wells, cluster wells, high-angle wells and other fields. It is of great significance for improving drilling efficiency and obtaining geological data, and has become one of the key technologies for efficient drilling in recent years.

[0003] At present, rotary steerable drilling systems mainly use mechanical rock breaking and hydraulic rock breaking. The mechanical rock breaking method mainly relies on the rotating drill bit to apply pressure to break solid rock for drilling. On the one hand, it generates a lot of friction and impact, causing the drill bit to wear. On the other hand, it generates a bias mechanism of lateral force, which is easily invalidated by adverse factors such as vibration and impact. Its hydraulic rock breaking method is to simply apply drilling pressure and continuous water injection impact. On the one hand, it will cause compaction, which is not conducive to rock breaking. On the other hand, it will also wear the bias mechanism and cause system failure.

[0004] In the existing technology, hydraulic pulses are used to assist mechanical rock breaking to alleviate the problems of drill bit wear and failure of the drill mechanism, overcome the limitations of traditional rock breaking methods in some cases, and provide more options for drilling in specific geological environments.

[0005] In the actual use of pulse-assisted rock breaking, due to the many restrictions of pulse rock breaking in the well, it is not possible to only use pulse impacts of the same frequency and displacement, but it is necessary to adjust in real time according to the drilling situation. However, since there will be delays and errors when uploading the downhole instructions to the ground, which will affect the normal progress of the drilling work, it is particularly important to complete the adaptive process of the entire pulse system in the well. Utility Model Content

[0006] The utility model aims to provide a pulse generating device which can be connected to a rotary steering system to adjust the pulse frequency and amplitude in real time during drilling and complete adaptive pulse-assisted rock breaking.

[0007] Another object of the utility model is to provide an adaptive rotary steering system, which can use a pulse generating device to complete downhole self-closed-loop control of drilling parameters, thereby overcoming problems such as decoding errors and delays that occur when downhole instructions are uploaded to the ground.

[0008] The embodiment of the utility model is achieved as follows:

[0009] A pulse generating device comprises a short section body and a pulse generating mechanism arranged in the middle of the short section body, wherein a through cavity is axially arranged in the short section body; the pulse generating mechanism comprises a pulse mechanism upper plate, a pulse mechanism middle plate and a pulse mechanism lower plate which are arranged in sequence, and multiple types of fan-shaped flow channels for medium to pass through are arranged on the pulse mechanism upper plate, the pulse mechanism middle plate and the pulse mechanism lower plate; wherein the pulse mechanism middle plate is fixed in the middle of the through cavity; the pulse mechanism upper plate is connected to an upper driving mechanism and rotates clockwise under the action of the upper driving mechanism; the pulse mechanism lower plate is connected to a lower driving mechanism and rotates counterclockwise under the action of the lower driving mechanism, so that when the pulse mechanism upper plate and the pulse mechanism lower plate rotate relative to the pulse mechanism middle plate, a pulsating change of mud discharge volume is realized.

[0010] In a preferred embodiment of the present invention, the disk in the pulse mechanism further includes a first bearing, a posture measurement unit and a second bearing which are sequentially arranged on the axis.

[0011] In a preferred embodiment of the present utility model, the above-mentioned pulse mechanism upper disk includes a disc-shaped upper rotating disk body, and the upper rotating disk body is provided with a first axial hole, three first fan-shaped flow channels, three first fan-shaped flow channels and a first transmission shaft connecting hole, and the first axial hole is arranged at the axis center of the upper rotating disk body; the three first fan-shaped flow channels are distributed in a circular array based on the first axial hole, and the central angle of each first fan-shaped flow channel is 60°; the three first fan-shaped flow channels are distributed in a circular array based on the first axial hole, and the first fan-shaped flow channel is located at the outer circle of the first fan-shaped flow channel, and is spaced apart from the first fan-shaped flow channel, and the central angle of the first fan-shaped flow channel is 60°; the first transmission shaft connecting hole is arranged on the outer circle of the first fan-shaped flow channel.

[0012] In a preferred embodiment of the utility model, the above-mentioned upper driving mechanism includes: a first rotating connecting shaft, an upper bearing bracket, an upper turbine generator and a first transmission shaft, one end of the first rotating connecting shaft passes through the first shaft hole and is connected to the first bearing; the upper bearing bracket is arranged on the inner wall of the through cavity, and the other end of the first rotating connecting shaft is fixed in the center by the upper bearing bracket; the upper turbine generator is assembled on the first rotating connecting shaft; the two ends of the first transmission shaft are respectively connected to the first rotating connecting shaft and the first transmission shaft connecting hole.

[0013] In a preferred embodiment of the present utility model, the lower disk of the above-mentioned pulse mechanism includes a lower rotating disk body in the shape of a disk, and the lower rotating disk body is provided with a third axial hole, a third fan circulation channel and a second transmission shaft connecting hole, and the third axial hole is arranged at the axis center of the upper rotating disk body; the third fan circulation channel is distributed in a circular array based on the third axial hole, and the central angle of each third fan circulation channel is 60°, and the radius of the third fan circulation channel is greater than or equal to the radius of the first fan circulation channel; the second transmission shaft connecting hole is arranged on the outer circle of the third fan circulation channel.

[0014] In a preferred embodiment of the utility model, the above-mentioned lower driving mechanism includes: a second rotating connecting shaft, a lower bearing bracket, a lower turbine generator and a second transmission shaft, one end of the second rotating connecting shaft passes through the third shaft hole and is connected to the second bearing; the lower bearing bracket is fixedly arranged on the inner wall of the through cavity, and the other end of the second rotating connecting shaft is fixed in the center by the lower bearing bracket; the lower turbine generator is assembled under the second rotating connecting shaft; the two ends of the second transmission shaft are respectively connected to the second rotating connecting shaft and the second transmission shaft connecting hole.

[0015] In a preferred embodiment of the utility model, a ring groove for assembling a middle disk fixing frame is provided in the middle of the through cavity, and the middle disk fixing frame is fixedly connected to the middle disk of the pulse mechanism.

[0016] In a preferred embodiment of the present utility model, the middle disk of the pulse mechanism includes a middle rotating disk body in the shape of a disk, on which a second axial hole, three second fan-shaped flow channels and three second fan-shaped flow channels are arranged, and the second axial hole is arranged at the axis center of the middle rotating disk body; the three second fan-shaped flow channels are distributed in a circular array based on the second axial hole, and the center angle of each second fan-shaped flow channel is 60°; the three second fan-shaped flow channels are distributed in a circular array based on the second axial hole, and the second fan-shaped flow channel is located at the outer circle of the second fan-shaped flow channel, and is spaced apart from the second fan-shaped flow channel, and the center angle of the second fan-shaped flow channel is 60°.

[0017] In a preferred embodiment of the present utility model, the above-mentioned attitude measurement unit includes a single-axis rate gyroscope and a three-axis accelerometer.

[0018] In a preferred embodiment of the present utility model, the pulse generating device is hung on the rotary guide tool, located between the guide head and the flexible short section and connected through a conductive ring.

[0019] An adaptive rotary steering system comprises any of the above-mentioned pulse generating devices and a downhole analyzing device communicatively connected to the pulse generating device, and downhole pulse signal processing is completed through the pulse generating device and the downhole analyzing device.

[0020] The beneficial effects of the embodiments of the utility model are as follows: the utility model designs a pulse generating device and an adaptive rotary steering system capable of completing a self-closed loop underground, and by hanging the pulse generating device on the rotary steering system, collects underground vibration data in real time, and transmits the underground vibration data to a underground analysis device; the underground analysis device converts the underground vibration data into drilling pressure data, and then calculates a pulse parameter adjustment value, which is then fed back to the pulse generating device, thereby realizing real-time adjustment of the pulse amplitude and frequency during drilling, completing adaptive pulse-assisted rock breaking, and thus overcoming the problems of decoding errors and delays that occur when underground instructions are uploaded to the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the cross-sectional structure of a pulse generating device according to an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the pulse generating mechanism of an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the relative relationship between the upper disk of the pulse mechanism and the middle disk of the pulse mechanism during rotation according to an embodiment of the utility model;

[0025] Figure 4 It is a schematic diagram of the relative relationship between the upper disk of the pulse mechanism and the lower disk of the pulse mechanism during rotation according to an embodiment of the utility model;

[0026] Figure 5 A flow chart of a method for using the adaptive rotary steering system according to an embodiment of the utility model;

[0027] Figure 6 This is a schematic diagram of data interaction of an adaptive rotary steering system according to an embodiment of the utility model.

[0028] Icons: 110-short section body; 111-through cavity; 112-annular groove; 113-middle plate fixing frame; 120-pulse generating mechanism; 121-pulse mechanism upper plate; 1211-first axial hole; 1212-first fan-shaped flow channel; 1213-first fan annular flow channel; 1214-first transmission shaft connecting hole; 122-pulse mechanism middle plate; 1221-second axial hole; 1222-second fan-shaped flow channel; 1223-second fan annular flow channel; 123-pulse mechanism lower plate; 1231-third shaft hole; 1232-third fan circulation channel; 1233-second transmission shaft connecting hole; 130-upper drive mechanism; 131-first rotating connecting shaft; 132-upper bearing bracket; 133-upper turbine generator; 134-first transmission shaft; 140-lower drive mechanism; 141-second rotating connecting shaft; 142-lower bearing bracket; 143-lower turbine generator; 144-second transmission shaft. DETAILED DESCRIPTION

[0029] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0030] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0031] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0032] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0033] It should be noted that the “plurality” mentioned in this article refers to two or more.

[0034] The purpose of the embodiments of the utility model is to improve the hydraulic pulse rock breaking method to assist mechanical rock breaking, alleviate the problems of drill bit wear and failure of the paranoid mechanism, overcome the limitations of traditional rock breaking methods that cannot be adapted in certain circumstances, and provide more options for drilling in specific geological environments.

[0035] At the same time, the entire data transmission process is carried out underground, and self-closed-loop control is completed underground, avoiding decoding errors, delays and other problems that occur when underground instructions are uploaded to the ground.

[0036] First embodiment

[0037] See also Figure 1 This embodiment provides a pulse generating device, which includes a short section body 110 and a pulse generating mechanism 120 disposed in the short section body 110.

[0038] A through cavity 111 is axially arranged in the sub body 110, which is used to axially assemble the pulse generating mechanism 120, and the upper driving mechanism 130 and the lower driving mechanism 140 respectively connected to the pulse generating mechanism 120. The pulse generating device is mounted on the rotary guide tool, located between the guide head and the flexible sub and connected through a conductive ring, so as to obtain the accurate vibration intensity of the drill string to the maximum extent.

[0039] The pulse generating device in this embodiment is provided with an electromagnetic control device for receiving pulse parameter instructions from a ground control or downhole analysis device, and transmitting collected vibration, rotation speed and other signals.

[0040] In this embodiment, the pulse generating mechanism 120 includes a pulse mechanism upper plate 121, a pulse mechanism middle plate 122 and a pulse mechanism lower plate 123 which are coaxially arranged in sequence. A plurality of types of fan-shaped flow channels for the medium to pass through are arranged on the pulse mechanism upper plate 121, the pulse mechanism middle plate 122 and the pulse mechanism lower plate 123. The mud discharge volume control function is achieved by changing the size of the flow channel area of ​​the fan-shaped flow channel.

[0041] Among them, an annular groove 112 for assembling a middle disk fixing frame 113 is provided in the middle of the through cavity 111 , and the middle disk fixing frame 113 is fixedly connected to the pulse mechanism middle disk 122 , so that the pulse mechanism middle disk 122 is fixed in the middle of the through cavity 111 .

[0042] See also Figure 2 The middle disk 122 of the pulse mechanism includes a disc-shaped middle rotating disk body, on which a second axial hole 1221, three second fan-shaped flow channels 1222 and three second fan-shaped flow channels 1223 are provided. The second axial hole 1221 is set at the axis center of the middle rotating disk body, which is used to respectively assemble the upper disk 121 and the lower disk of the pulse mechanism and ensure that the three pulse disks are coaxial.

[0043] Specifically, the three second fan-shaped flow channels 1222 are distributed in a circular array based on the second axial hole 1221, and the central angle of each second fan-shaped flow channel 1222 is 60°; the three second fan annular flow channels 1223 are distributed in a circular array based on the second axial hole 1221, and the second fan annular flow channels 1223 are located on the outer circle of the second fan-shaped flow channels 1222 and are spaced apart from the second fan-shaped flow channels 1222, and the central angle of the second fan annular flow channels 1223 is 60°.

[0044] The pulse mechanism middle plate 122 also includes a first bearing, a posture measurement unit, and a second bearing, which are sequentially arranged at the position of the second shaft hole 1221. The posture measurement unit includes a single-axis rate gyro and a three-axis accelerometer, which are used for real-time monitoring and data collection of downhole radial vibration and axial vibration data, drill collar speed changes, etc., to provide accurate and reliable posture measurement. Among them, the downhole radial vibration and axial vibration data are measured for a period of time near the drill bit at the beginning of drilling, which can characterize the vibration intensity of the drill string. The drill collar speed changes are monitored to coordinate the adjustment of the speed and pulse flow of the pulse generating mechanism 120.

[0045] By installing the first bearing and the second bearing at the axial center position, the upper plate 121 and the lower plate of the pulse mechanism can output different rotation speeds, thereby completing relative rotation, thereby achieving pulsating changes in mud displacement.

[0046] The pulse mechanism center plate 122 is fixed on the drill collar, and its rotation speed is consistent with the drill collar. A single-axis rate gyroscope is embedded in the center of the center plate to monitor the change of the drill collar rotation speed. Figure 3 , through the relative rotation of the middle plate and the upper plate, the amplitude of the pulse flow is controlled. When the second fan-shaped flow channel 1222 and the second fan-shaped flow channel 1223 are completely aligned with the first fan-shaped flow channel and the first fan-shaped flow channel respectively, the flow rate is maximum; when the pulse mechanism middle plate and the pulse mechanism upper plate are staggered by 60°, the second fan-shaped flow channel 1222 and the second fan-shaped flow channel 1223 are exactly closed with the first fan-shaped flow channel 1212 and the first fan-shaped flow channel 1213 respectively, and the flow rate is zero; when at other angles, the pulse mechanism middle plate and the pulse mechanism upper plate expose part of the flow channel.

[0047] The pulse mechanism upper disk 121 is connected to the upper driving mechanism 130 and rotates clockwise under the action of the upper driving mechanism 130 . Specifically, the pulse mechanism upper disk 121 includes a disc-shaped upper rotating disk body, on which a first axial hole 1211, three first fan-shaped flow channels 1212, three first fan-shaped flow channels 1213 and a first transmission shaft connecting hole 1214 are provided. The first axial hole 1211 is arranged at the axis center of the upper rotating disk body; the three first fan-shaped flow channels 1212 are distributed in a circular array based on the first axial hole 1211, and the central angle of each first fan-shaped flow channel 1212 is 60°; the three first fan-shaped flow channels 1213 are distributed in a circular array based on the first axial hole 1211, and the first fan-shaped flow channel 1213 is located at the outer ring of the first fan-shaped flow channel 1212, and is spaced apart from the first fan-shaped flow channel 1212, and the central angle of the first fan-shaped flow channel 1213 is 60°; the first transmission shaft connecting hole 1214 is arranged at the outer ring of the first fan-shaped flow channel 1213.

[0048] The structures of the pulse mechanism upper disk 121 and the pulse mechanism middle disk 122 are similar, except that the pulse mechanism middle disk 122 is fixed, while the pulse mechanism upper disk 121 can rotate clockwise under the action of the upper driving mechanism 130. When the pulse mechanism upper disk 121 rotates relative to the pulse mechanism middle disk 122, the displacement size can be changed.

[0049] The upper driving mechanism 130 specifically includes a first rotating connecting shaft 131, an upper bearing bracket 132, an upper turbine generator 133 and a first transmission shaft 134. One end of the first rotating connecting shaft 131 passes through the first shaft hole 1211 and is connected to the first bearing; the upper bearing bracket 132 is arranged on the inner wall of the through cavity 111, and the other end of the first rotating connecting shaft 131 is fixed in the center by the upper bearing bracket 132; the upper turbine generator 133 is assembled on the first rotating connecting shaft 131; and the two ends of the first transmission shaft 134 are respectively connected to the first rotating connecting shaft 131 and the first transmission shaft 134 connecting hole 1214.

[0050] In this embodiment, the first rotating connecting shaft 131 and the first transmission shaft 134 form a magnetic pole pair, and driven by the upper turbine generator 133, the pulse mechanism upper plate 121 rotates clockwise. At the same time, the drill collar applies a clockwise power torque to the first rotating connecting shaft 131 through the upper bearing hanger 132, and the clockwise electromagnetic torque applied by the upper turbine generator 133, the resistance torque and the rotational inertia are combined to control the first rotating connecting shaft 131 to accelerate rotation.

[0051] The pulse mechanism lower plate 123 is connected to the lower driving mechanism 140 and rotates counterclockwise under the action of the lower driving mechanism 140, so that when the pulse mechanism upper plate 121 and the pulse mechanism lower plate 123 rotate relative to the pulse mechanism middle plate 122, the pulsating change of the mud discharge volume is realized.

[0052] The operating principle of the pulse mechanism lower disk 123 and the lower driving mechanism 140 is the same as the operating principle of the pulse mechanism upper disk 121 and the upper driving mechanism 130, but the rotation direction is opposite.

[0053] The pulse mechanism lower disk 123 includes a lower rotating disk body in the shape of a disk, on which a third axial hole 1231, a third fan circulation channel 1232 and a second transmission shaft connecting hole 1233 are provided. The third axial hole 1231 is arranged at the axis center of the upper rotating disk body; the third fan circulation channels 1232 are distributed in a circular array based on the third axial hole 1231, and the central angle of each third fan circulation channel 1232 is 60°, and the radius of the third fan circulation channel 1232 is greater than or equal to the radius of the first fan circulation channel 1213; the second transmission shaft connecting hole 1233 is arranged on the outer circle of the third fan circulation channel 1232.

[0054] The lower driving mechanism 140 includes: a second rotating connecting shaft 141, a lower bearing bracket 142, a lower turbine generator 143 and a second transmission shaft 144, one end of the second rotating connecting shaft 141 passes through the third shaft hole 1231 and is connected to the second bearing; the lower bearing bracket 142 is fixedly arranged on the inner wall of the through cavity 111, and the other end of the second rotating connecting shaft is fixed in the center by the lower bearing bracket 142; the lower turbine generator 143 is assembled under the second rotating connecting shaft 141; the two ends of the second transmission shaft 144 are respectively connected to the second rotating connecting shaft 141 and the second transmission shaft 144 connecting hole 1233.

[0055] See also Figure 4 When the third fan-shaped flow channel 1232 of the lower plate of the pulse mechanism overlaps with the first fan-shaped flow channel 1213 of the upper plate of the pulse mechanism, the first fan-shaped flow channel 1212 of the upper plate of the pulse mechanism is completely closed; when the first fan-shaped flow channel 1213 of the upper plate of the pulse mechanism is completely closed by the lower plate of the pulse mechanism, the first fan-shaped flow channel 1212 of the upper plate of the pulse mechanism is open; when the first fan-shaped flow channel 1213 of the upper plate of the pulse mechanism is partially closed by the lower plate of the pulse mechanism, the first fan-shaped flow channel 1212 of the upper plate of the pulse mechanism is partially open.

[0056] In actual operation, this embodiment uses the upper turbine generator 133 and the transmission rod to control the position of the middle plate and the upper plate to adjust the flow rate. The lower turbine generator 143 and the transmission rod are used to control the rotation position of the lower plate, and the frequency of pulse displacement is controlled by adjusting the rotation speed of the lower plate. The mud with displacement fluctuation assists drilling, especially the drilling of the stable inclination section in the directional well plan.

[0057] Second embodiment

[0058] The adaptive rotary steering system provided in the second embodiment monitors the compaction of the drill bit at the bottom of the well in real time, records the longitudinal vibration intensity in real time, converts it into drilling pressure, adjusts the required pulse intensity according to the drilling pressure, generates an adjustment signal, feeds this signal back to the pulse generating device, changes the pulse intensity after receiving the signal, and forms a self-closed loop underground.

[0059] See also Figure 5 and 6 This embodiment also provides an adaptive rotary steering system, comprising the pulse generator of the first embodiment and a downhole analysis device in communication with the pulse generator. The method of using the adaptive rotary steering system includes:

[0060] S1: Before the underground self-closed loop pulse control, it is necessary to send a constant pulse parameter instruction to the pulse generating device from the ground. The constant pulse parameter instruction includes pulse amplitude and frequency. The pulse generating mechanism 120 adjusts the rotation position and rotation speed according to the amplitude and frequency.

[0061] During the implementation of this solution, the ground first transmits a constant pulse parameter instruction to the underground, and the constant pulse parameter instruction includes pulse amplitude and frequency. The pulse amplitude and frequency are controlled by controlling the rotation position and rotation speed of the pulse generating mechanism 120, and the pulse jet is applied at the beginning of the drilling process.

[0062] S2: The pulse generator receives a constant pulse parameter instruction, and applies a pulse jet during the drilling process.

[0063] In this embodiment, a triaxial accelerometer is installed at the axis of the pulse mechanism disk 122 for monitoring radial vibration and axial vibration. When drilling begins, real-time vibration data near the drill bit that can characterize the vibration intensity of the drill string is collected.

[0064] S3: The pulse generating device transmits the real-time collected data to the downhole analyzing device, wherein the real-time collected data includes downhole vibration data. The downhole analyzing device converts the downhole vibration data into drilling pressure data and then analyzes it, and then calculates the pulse parameter adjustment range.

[0065] The downhole analysis device receives the downhole vibration data, converts the vibration data into drilling pressure data through classification machine learning, and forms a mapping relationship between the drilling pressure data and the downhole vibration data. Among them, the downhole vibration data at least includes downhole longitudinal vibration data. Specifically, the downhole analysis device compares and analyzes the acquired drilling parameters to form a stable corresponding relationship between drilling pressure and vibration conditions, so that in the subsequent drilling process, the drilling pressure data can be mapped to the downhole vibration data at any time, thereby performing real-time monitoring.

[0066] S4: The downhole analysis device feeds back the pulse parameter adjustment range to the pulse generating device, and adjusts the displacement and frequency of the pulse generating device by adjusting the rotational position and rotation speed of the pulse mechanism upper disk 121, the pulse mechanism middle disk 122 and the pulse mechanism lower disk 123.

[0067] During drilling, the downhole analysis device in the pulse generator sub compares the drilling pressure data with the set range. When the drilling pressure data is greater than the set range value, a low command signal is output to make the pulse generator reduce the displacement and frequency; when the drilling pressure data is less than the set range value, a high command signal is output to make the pulse generator increase the displacement and amplitude. The output command signal and decoded data are transmitted through the pulse generator (transmitted to the pulse generator and the ground control system).

[0068] S5: The downhole analysis device continuously obtains and calculates the current pulse parameters, and continuously dynamically adjusts the pulse parameter range value. The pulse generating device continuously dynamically adjusts the displacement and frequency according to the parameter range changes to form downhole self-closed loop pulse control.

[0069] After the displacement of the pulse generator is adjusted for a period of time, when the drilling pressure returns to the normal range, the downhole analysis device continues to receive the real-time pulse parameter signal of the pulse generator, and the downhole analysis device continues to calculate the drilling pressure and adjust the pulse parameter adjustment range value in real time. The downhole analysis device feeds back the adjusted pulse parameter adjustment range value to the pulse generator, and the pulse generator performs frequent pulse adjustments based on the pulse parameter range value to adapt to the target pulse parameter, forming an underground self-closed loop. At this time, the ground control system does not need to participate, thereby avoiding various problems such as delays and errors when the command is uploaded to the ground.

[0070] In summary, the utility model designs a pulse generating device and an adaptive rotary steering system that can complete a self-closed loop underground. By hanging the pulse generating device on the rotary steering system, underground vibration data is collected in real time and transmitted to a underground analysis device. The underground analysis device converts the underground vibration data into drilling pressure data, calculates the pulse parameter adjustment value, and feeds the pulse parameter adjustment value back to the pulse generating device, so as to realize real-time adjustment of the pulse amplitude and frequency during drilling, complete adaptive pulse-assisted rock breaking, and overcome the problems of decoding errors and delays that occur when underground instructions are uploaded to the ground.

[0071] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present utility model.

[0072] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.

[0073] The units described as separate components may or may not be physically separated. As a unit, it can be appreciated by those skilled in the art that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present utility model.

[0074] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0075] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the utility model is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a grid device, etc.) to perform all or part of the steps of the method described in each embodiment of the utility model.

[0076] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A pulse generating device, characterized in that: The pulse generating device comprises: A short section body, wherein a through cavity is axially arranged in the short section body; A pulse generating mechanism is arranged in the middle of the short section body; the pulse generating mechanism comprises an upper plate of a pulse mechanism, a middle plate of a pulse mechanism and a lower plate of a pulse mechanism which are arranged in sequence, and the upper plate of the pulse mechanism, the middle plate of the pulse mechanism and the lower plate of the pulse mechanism are provided with various types of fan-shaped flow channels for the medium to pass through; wherein the middle plate of the pulse mechanism is fixed in the middle of the through cavity; the upper plate of the pulse mechanism is connected to an upper driving mechanism and rotates clockwise under the action of the upper driving mechanism; the lower plate of the pulse mechanism is connected to a lower driving mechanism and rotates counterclockwise under the action of the lower driving mechanism, so that when the upper plate of the pulse mechanism and the lower plate of the pulse mechanism rotate relative to the middle plate of the pulse mechanism, a pulsating change of the mud discharge volume is realized.

2. The pulse generating device according to claim 1, characterized in that: The pulse mechanism center disk also includes a first bearing, a posture measurement unit and a second bearing which are sequentially arranged on the axis.

3. The pulse generating device according to claim 2, characterized in that: The pulse mechanism upper disk comprises a disc-shaped upper rotating disk body, on which are provided: A first axial hole, arranged at the axis of the upper rotating disk body; 3 first fan-shaped flow channels, which are distributed in a circular array based on the first axial holes, and the central angle of each first fan-shaped flow channel is 60°; 3 first fan annular flow channels, based on the first axial hole being distributed in a circular array, and the first fan annular flow channels are located on the outer circle of the first fan-shaped flow channels and are spaced apart from the first fan-shaped flow channels, and the central angle of the first fan annular flow channels is 60°; The first transmission shaft connecting hole is arranged on the outer ring of the first fan circulating flow channel.

4. The pulse generating device according to claim 3, characterized in that: The upper driving mechanism comprises: a first rotating connecting shaft, one end of which passes through the first shaft hole and is connected to the first bearing; An upper bearing bracket is arranged on the inner wall of the through cavity, and the other end of the first rotary connecting shaft is fixed in the center by the upper bearing bracket; an upper turbine generator, mounted on the first rotating connecting shaft; A first transmission shaft, wherein two ends of the first transmission shaft are respectively connected to the first rotating connection shaft and the first transmission shaft connecting hole.

5. The pulse generating device according to claim 3, characterized in that: The pulse mechanism lower disk comprises a disc-shaped lower rotating disk body, on which is disposed; A third shaft hole is arranged at the shaft center of the upper rotating disk body; A third fan annular flow channel, based on the third axial holes being distributed in a circular array, a central angle of each of the third fan annular flow channels is 60°, and a radius of the third fan annular flow channel is greater than or equal to a radius of the first fan annular flow channel; The second transmission shaft connecting hole is arranged on the outer ring of the third fan circulating flow channel.

6. The pulse generating device according to claim 5, characterized in that: The lower driving mechanism comprises: a second rotating connecting shaft, one end of which passes through the third shaft hole and is connected to the second bearing; A lower bearing bracket is fixedly arranged on the inner wall of the through cavity, and the other end of the second rotary connecting shaft is fixed in the center through the lower bearing bracket; a lower turbine generator, mounted below the second rotary connecting shaft; A second transmission shaft, two ends of which are respectively connected to the second rotating connection shaft and the second transmission shaft connecting hole.

7. The pulse generating device according to claim 1, characterized in that: A ring groove for assembling a middle disk fixing frame is arranged in the middle of the through cavity, and the middle disk fixing frame is fixedly connected to the middle disk of the pulse mechanism.

8. The pulse generating device according to claim 1, characterized in that: The middle disk of the pulse mechanism includes a disc-shaped middle rotating disk body, on which are provided: A second axial hole is arranged at the axis of the middle rotating disk body; 3 second fan-shaped flow channels, distributed in a circular array based on the second axial holes, and the central angle of each second fan-shaped flow channel is 60°; The three second fan annular flow channels are distributed in a circular array based on the second axial holes, and the second fan annular flow channels are located on the outer circle of the second fan-shaped flow channel and are spaced apart from the second fan-shaped flow channel, and the central angle of the second fan annular flow channel is 60°.

9. The pulse generating device according to claim 2, characterized in that: The attitude measurement unit includes a single-axis rate gyroscope and a three-axis accelerometer; the pulse generating device is hung on the rotary guide tool, located between the guide head and the flexible short section and connected through a conductive ring.

10. An adaptive rotary steering system, characterized in that: It comprises a pulse generating device as described in any one of claims 1 to 9 and a downhole analyzing device communicatively connected to the pulse generating device, and downhole pulse signal processing is completed through the pulse generating device and the downhole analyzing device.

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