While-drilling acoustic auto-tracking wellbore tool and method for using same

Abstract

A while-drilling acoustic auto-tracking wellbore tool and a method for using same. The tool comprises: a power generation and communication system (100), which comprises a power generation system and a communication system, wherein the communication system is used for bidirectional transfer of measurement data and a control instruction; a power and measurement and control system (200), which comprises a measurement while drilling system, wherein the measurement while drilling system is used for measuring inclination and azimuth data of a newly drilled borehole, and transmitting the data to the communication system; and an acoustic measurement and guidance system (300), which comprises an acoustic emission and measurement and control system, wherein the acoustic emission and measurement and control system is used for emitting an acoustic signal in the newly drilled borehole, receiving a return signal and transmitting the return signal to the communication system. The solution solves the difficult problems of communicating a newly drilled well and an old borehole, determining the distance between a drill bit and the old borehole in real time, etc. The acoustic emission and measurement and control system emits the acoustic signal in the newly drilled borehole, receives the return signal and transmits the return signal to the communication system, and the position of a wellbore is dynamically scanned and monitored in an acoustic while-drilling manner, thereby achieving the aim of performing measurement while drilling.

Description

Acoustic automatic tracking while drilling wellbore tool and method of use thereof

[0001] Related Applications

[0002] This application claims priority to Chinese Patent Application No. 202410585254.8, filed May 11, 2024, and incorporates by reference the disclosure of the aforementioned patent application as part of the present application. TECHNICAL FIELD

[0003] The present application relates to the technical field of oil and gas exploitation, and in particular to an acoustic automatic tracking while drilling wellbore tool and a method of use thereof. BACKGROUND

[0004] There are currently many old oil and gas fields, which also provide a basis for large-scale construction of gas storage bases, but some oilfield blocks have complex old well conditions, multiple branches, falling objects in the wellbore, or casing variations, and complex conditions such as old wellhead collapse. A batch of newly built gas storage bases have difficult-to-dispose scrap wells (with fish in the downhole), and have performed window sidetracking with a whipstock, which results in the inability to treat the old well through the original borehole. Such complex old wells have exposed the reservoir, which seriously affects the feasibility of the construction of gas storage bases with such wells.

[0005] As old oilfield development continues to deepen, the proportion of difficult casing lost wells increases year by year, and the repair difficulty gradually increases. According to statistics, difficult casing lost wells are mainly non-passageway broken wells, and in severe cases, casing internal and external gas leakage and interlayer gas channeling may occur. Such casing lost wells have no effective detection means during workover, and the lost casing cannot be found, which leads to the inability to repair or effective scrap, seriously affecting the injection-production relationship of the block, and at the same time, such casing lost wells may cause serious environmental problems due to the return of shallow layer water to the ground by downhole fluid flow.

[0006] The commonly used method in the drilling industry is to drill a new well along the trajectory of the old wellbore, which requires maintaining directional accuracy so that the trajectory of the new well is always at a suitable distance from the trajectory of the old wellbore. The commonly used guiding tool is a passive magnetic guiding tool, which can capture the magnetic signals of the casing of the old wellbore wellbore, and through signal analysis and processing, the real-time relative position of the new wellbore and the old wellbore is calculated to provide reliable parameters for the next directional drilling. The measurement is performed every 50-100 meters in the early drilling and every 5-20 meters in the later drilling, or even every 1 meter, which results in low efficiency and multiple tripping. Moreover, the existing tool cannot be drilled into the lower part of the old wellbore with casing.

[0007] The conventional treatment method for solving this problem is to perforate the old wellbore by a new wellbore, perforate the casing of the old wellbore, and then inject the cement slurry into the old wellbore to achieve the sealing of the old wellbore, but this perforation and cement injection method has great uncertainty and cannot ensure the sealing performance of the old wellbore; meanwhile, this operation method cannot realize the bridge connection of the lower casing and the reuse.

[0008] The best treatment method is to use acoustic wave to detect the distance and direction of the old wellbore in the new wellbore, and according to the measurement, use the measurement-while-drilling system and control system to adjust the wellbore trajectory to approach the old wellbore, if there is a casing in the lower part, use the measurement and control system to gradually approach along the casing until the casing is opened outside the window operation is performed, the old wellbore is re-entered, and then the cement slurry is injected for sealing, which can ensure the effective sealing of the old wellbore of the storage layer of the gas storage library and the environmental protection well treatment well and the casing, and if there is remaining oil in the lower part of the casing, the expansion pipe is used to bridge the wellbore reconstruction.

[0009] At present, the existing window opening technology and process cannot realize the pipe opening window and the old wellbore re-entry construction problem, and the position of the drill bit in the construction process leads to the difficulty in drilling into or out of the wellbore, so it is necessary to explore a new tool, new technology and new method to solve the new and old wellbore connection, real-time drill bit distance monitoring and other construction problems, realize the efficient sealing of the old wellbore and the wellbore reconstruction, and achieve the purpose of safe gas storage library construction, environmental protection well treatment, casing and remaining oil exploitation.

[0010] The real-time measurement of the wellbore tool and method using acoustic wave while drilling is still blank, the existing window opening technology and process are low in efficiency, the pipe opening window and the old wellbore re-entry construction process are difficult to realize, and it is difficult to determine whether to enter or drill out when the lower part is a cement plug or a bare hole. Therefore, a new tool, technology and method need to be explored to solve the connection of the new wellbore to the old wellbore, real-time determination of the distance between the drill bit and the old wellbore, and other problems, to realize the efficient sealing of the old wellbore or the wellbore reconstruction, and achieve the purpose of safe gas storage library construction, environmental protection well treatment, casing and remaining oil exploitation.

[0011] Therefore, the present inventors propose a drilling acoustic wave automatic tracking wellbore tool and its use method based on years of experience and practice in the relevant industry to overcome the defects of the prior art. SUMMARY

[0012] The application aims to provide a sound wave automatic tracking wellbore tool while drilling and a use method thereof, effectively solve the problems of connecting a new wellbore to an old wellbore, judging the distance between a drill bit and the old wellbore in real time and the like, in the application, a sound emission and measurement and control system emits sound wave signals in a new wellbore, receives return signals and transmits the return signals to a communication system, through a sound wave while drilling mode, the wellbore position is dynamically scanned and monitored, and the purposes of while drilling and while measuring are achieved.

[0013] The application is achieved in this way, and provides a sound wave automatic tracking wellbore tool while drilling, which comprises sequentially arranged:

[0014] A power generation and communication system, comprising a power generation system and a communication system electrically connected with a ground control center, the power generation system is used for self-power generation to supply electric energy, and the communication system is used for bidirectional transmission of measurement data and control instructions;

[0015] A power and measurement and control system, comprising a while drilling measurement system, a power motor and a measurement and control system, the while drilling measurement system is used for measuring well inclination and azimuth data of a new wellbore and transmitting the data to the communication system, the power motor is used for converting mud hydraulic energy into mechanical energy, and the measurement and control system comprises a control and communication electronic cabin electrically connected with the communication system;

[0016] A sound wave measurement and guiding system, comprising a sound emission and measurement and control system, a guiding system and a transmission system, the sound emission and measurement and control system is used for emitting sound wave signals in a new wellbore, receiving return signals and transmitting the return signals to the communication system, the transmission system is used for transmitting mechanical energy of the power motor to a drill bit, and the guiding system is automatically guided to push against a well wall to adjust a wellbore trajectory under the control of the control and communication electronic cabin.

[0017] The application can also be achieved in this way, and provides a use method of a sound wave automatic tracking wellbore tool while drilling, comprising the following steps:

[0018] Step a, connecting a drill string, the sound wave automatic tracking wellbore tool while drilling and a drill bit, and lowering into a well;

[0019] Step b, emitting sound wave signals to the surrounding through a sound emission and receiver in a new wellbore;

[0020] Step c, receiving return signals by the sound emission and receiver;

[0021] Step d, measuring well inclination and azimuth of the new wellbore by a while drilling gyro system;

[0022] Step e, transmitting measurement related data to a ground control center through mud pulse, and interpreting and analyzing the relative distance and azimuth between an old wellbore and the new wellbore;

[0023] Step f, according to the measured data, the ground control center sends instructions to the two-way communication electronic cabin, and the two-way communication electronic cabin transmits the instructions to the control and communication electronic cabin;

[0024] Step g, the required orientation of the pushing motor drives the pushing block in the pushing structure to push against the well wall;

[0025] Step h, real-time adjustment of the wellbore trajectory according to the measurement results;

[0026] Step i, entering the lower wellbore of the old wellbore.

[0027] From the above, the automatic tracking well tool for drilling acoustic waves and the use method thereof provided by the application have the following beneficial effects:

[0028] In the application, the acoustic emission and measurement and control system emits acoustic wave signals in the new wellbore, receives return signals, and transmits the return signals to the communication system, achieving the purpose of drilling and measuring, and accurately finding the lower casing, fish, cement plug, etc. The application can enter the lower wellbore, control the pushing of the lower guide system, realize 360° automatic adjustment of the tool face angle to complete the guidance, adjust the drilling attitude in real time according to the acoustic wave detection wellbore distance and direction, achieve the purpose of re-entering the old wellbore, and finally seal or expand the pipe to bridge and reuse according to the needs of the site.

[0029] The application solves technical problems such as disposal of difficult wells in gas storage, environmental protection well treatment, casing breaking well reutilization, etc. In the old oilfield ballast stone engineering, well pattern reconstruction can be realized, the remaining oil potential can be greatly improved, and the purpose of stable production of crude oil can be achieved. In the gas storage construction field, the number of difficult old wells in the early stage is large, and the area cannot be effectively disposed. The construction of gas storage has become possible, ensuring energy security. In the environmental protection well treatment aspect, the old wellbore is re-entered, the lower casing breaking well is completely sealed, and the environmental protection well treatment problem that has plagued the oilfield for many years is solved. BRIEF DESCRIPTION OF DRAWINGS

[0030] The following drawings are only intended to illustrate and explain the application, and do not limit the scope of the application. Among them:

[0031] Fig. 1 is a structural schematic view of the automatic tracking well tool for drilling acoustic waves of the application.

[0032] Fig. 2 is a schematic view of the upper joint of the pulser of the application.

[0033] Fig. 3 is a schematic view of the first TC bearing of the application.

[0034] Fig. 4 is an A-A sectional view of Fig. 3.

[0035] Fig. 5 is a schematic view of the turbine group of the application.

[0036] Figure 6 is a schematic diagram of the first housing and flexible joint connection of the present application.

[0037] Figure 7 is a schematic diagram of the acoustic wave automatic tracking while drilling wellbore tool of the present application detecting a lower cavity.

[0038] Figure 8 is a schematic diagram of the acoustic wave automatic tracking while drilling wellbore tool of the present application detecting a lower casing collar.

[0039] Figure 9 is a schematic diagram of the acoustic wave automatic tracking while drilling wellbore tool of the present application detecting a lower fish.

[0040] Figure 10 is a schematic diagram of the position relationship between an old borehole and a newly drilled borehole.

[0041] Figure 11 is a partial schematic diagram of the push structure of the present application.

[0042] Figure 12 is a flow chart of the acoustic wave automatic tracking while drilling wellbore method of the present application.

[0043] Figure: 100, power generation and communication system; 200, power and control system; 300, acoustic wave measurement and steering system; 400, ground control center; 1, upper joint of pulser; 101, joint notch; 102, first flow channel annulus; 2, pulser; 201, second flow channel hole; 3, first housing; 4, first TC bearing static sleeve; 401, first flow channel hole; 5, first TC bearing dynamic sleeve; 6, turbine group; 7, turbine sheath; 8, turbine spacer sleeve; 9, second TC bearing static sleeve; 10, second TC bearing dynamic sleeve; 11, generator; 12, power supply channel; 13, two-way communication electronic cabin; 14, first string bearing; 15, first string bearing spacer sleeve; 16, first string bearing sheath; 17, communication and power supply channel; 18, circuit connection ring; 19, flexible short circuit; 20, drilling gyro system; 21, anti-drop shell; 22, anti-drop nut; 23, anti-drop pull rod; 24, motor stator; 25, motor rotor; 26, universal shaft; 27, second housing; 28, control and communication electronic cabin; 29, water cap; 2901, third flow channel hole; 30, acoustic emission and support block control channel; 31, push motor; 32, third TC bearing static sleeve; 33, third TC bearing dynamic sleeve; 34, push structure; 35, second string bearing; 36, third housing; 37, acoustic emission and receiver; 38, lower short circuit; 39, lower dynamic sleeve; 40, transmission shaft; 41, drill bit; 4101, drill bit water eye; 42, old borehole; 43, upper casing; 44, lower cavity; 45, newly drilled borehole; 46, lower casing collar; 4601, casing collar fish head; 47, fish. DETAILED DESCRIPTION

[0044] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described with reference to the accompanying drawings.

[0045] The specific embodiments of the present application described herein are for the purpose of illustrating the present application and should not be construed as limiting the present application in any manner. Based on the teachings of the present application, those skilled in the art will be able to conceive of any possible modifications of the present application, which are deemed to fall within the scope of the present application. It should be noted that when an element is referred to as being "provided on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "mounting", "connection", and "connection" should be interpreted broadly, for example, they can be mechanical connection or electrical connection, or internal connection between two elements, or direct connection or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiments.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0047] As shown in FIGS. 1-6, the present application provides a sonic automatic tracking wellbore tool while drilling, comprising sequentially arranged:

[0048] The power generation and communication system 100 comprises a power generation system for generating power and a communication system electrically connected to the ground control center 400, the power generation system for generating power, and the communication system for bidirectional transmission of measurement data and control instructions;

[0049] The power and measurement and control system 200 comprises a while-drilling measurement system, a power motor, and a measurement and control system, the while-drilling measurement system for measuring the inclination and azimuth data of the new borehole and transmitting the data to the communication system; the power motor for converting the mud hydraulic energy into mechanical energy, and the measurement and control system comprising a control and communication electronic cabin 28 electrically connected to the communication system;

[0050] The acoustic wave measurement and guiding system 300 comprises an acoustic emission and measurement and control system, a guiding system and a transmission system, the acoustic emission and measurement and control system is used for emitting acoustic wave signals in a newly drilled borehole, receiving return signals and transmitting the return signals to a communication system, the transmission system is used for transmitting mechanical energy of a power motor to a drill bit, and the guiding system is used for automatically guiding against a well wall to adjust a borehole trajectory under the control of a control and communication electronic cabin.

[0051] The application provides electric energy for the communication system, the power and measurement and control system 200 and the acoustic wave measurement and guiding system 300 through a self-powered power generation system, and transmits signals to a ground control center through mud pulses by means of a pulser, and sends instructions to the downhole according to existing borehole trajectory adjustment by interpreting and analyzing acoustic wave and gyro and other related data, controls and adjusts the posture of a drill string, and drills into a target position.

[0052] In the acoustic wave automatic tracking wellbore tool while drilling of the application, the acoustic emission and measurement and control system is used for emitting acoustic wave signals in a newly drilled borehole, receiving return signals and transmitting the return signals to a communication system, so that the purpose of drilling and measuring simultaneously is achieved, and lower part casing breakage, fish falling and cement plugs and the like are accurately found; the application can enter a lower wellbore, push against and control a lower guiding system, realize 360° automatic adjustment of a tool face angle to complete guiding, adjust a drilling posture in real time according to acoustic wave detection of a wellbore distance and direction, achieve the purpose of re-entering an old borehole, and finally, plugging or inflatable pipe bridging is carried out according to the needs of the field to achieve reuse.

[0053] The application solves technical problems such as disposal of difficult wells of gas storage, treatment of environmental protection wells, production reuse of casing breakage wells and the like, can realize well pattern reconstruction in old oilfield ballast stone engineering, greatly improves remaining oil tapping effect, and achieves the purpose of stable production of crude oil; in the aspect of gas storage construction, makes it possible to build a gas storage in an area where a large number of old wells exist and cannot be effectively disposed, ensures energy security; in the aspect of treatment of environmental protection wells, the application realizes re-entry into an old wellbore, completely plugs a lower part casing breakage well, and solves the problem of treatment of environmental protection wells which has plagued oilfields for many years.

[0054] Further, as shown in FIG. 1, the power generation system comprises a pulser 2, a turbine set 6 and a generator 11, the turbine set 6 and the generator 11 are arranged on the pulser 2, the turbine set 6 can drive the pulser 2 to rotate under the action of mud, the pulser 2 rotates to make the generator 11 generate electricity, and the generator 11 is electrically connected with the power and measurement and control system 200 and the acoustic wave measurement and guiding system 300; the communication system comprises a two-way communication electronic cabin 13, the generator 11 is electrically connected with the two-way communication electronic cabin 13 (a battery pack is arranged in the cabin and is used for storing electric energy); and the two-way communication electronic cabin 13 is used for two-way communication between the power and measurement and control system 200, the acoustic wave measurement and guiding system 300 and the ground control center 400.

[0055] Further, as shown in Fig. 1, the acoustic emission and measurement and control system comprises an acoustic emission and receiver 37 electrically connected with the two-way communication electronic cabin 13, the acoustic emission and receiver 37 is used for emitting acoustic wave signals in the new drill hole, receiving return signals and transmitting the return signals to the two-way communication electronic cabin 13.

[0056] Further, as shown in Fig. 1, the guiding system comprises a pushing structure 34 and a pushing motor 31, the pushing motor 31 is electrically connected with the two-way communication electronic cabin 13, and the pushing structure 34 comprises a pushing block, the pushing motor 31 can drive the pushing block to extend radially to push the well wall.

[0057] Further, as shown in Fig. 1, the power motor comprises a motor outer shell, a motor stator 24 and a motor rotor 25, the transmission system comprises a universal shaft 26, a water cap 29 and a transmission shaft 40, the universal shaft 26 is fixedly connected with the motor rotor 25, the universal shaft 26 is connected with the transmission shaft 40 through the water cap 29, and the transmission shaft 40 is connected with a drill bit 41; the motor rotor 25 drives the universal shaft 26, the water cap 29, the transmission shaft 40 and the drill bit 41 to rotate under the action of the mud hydraulic energy.

[0058] The power motor can convert the mud hydraulic energy into mechanical energy, which is transmitted to the drill bit 41 through the universal shaft 26 and the transmission shaft 40. Since the motor rotor 25 rotates eccentrically around the motor stator 24, the universal shaft 26 converts the eccentric motion into directional rotation of the transmission shaft 40. The material of the universal shaft 26 has a certain flexibility, which includes but is not limited to titanium alloy, beryllium copper alloy, etc.

[0059] Further, the power generation and communication system is arranged in the first shell 3; if the distance from the casing is less than 5 meters, the interference can be reduced by using the while-drilling gyroscope 20, and if the distance from the casing is greater than 5 meters, the MWD (measurement while drilling) can be selected. The measurement while drilling system is the while-drilling gyroscope system 20, the first shell 3 is connected with the gyroscope outer shell through the flexible short connection 19; the gyroscope outer shell is connected with the power motor through the anti-falling short connection structure; the end of the motor outer shell away from the while-drilling gyroscope system 20 is connected with the second shell 27 and the third shell 36, the control and communication electronic cabin 28 is arranged on the second shell 27, the acoustic emission and measurement and control system and the guiding system are arranged on the third shell 36, and the transmission system is connected with the drill bit 41 after passing through the second shell 27 and the third shell 36.

[0060] The flexible short connection 19 is bent and deformed when the pushing block of the lower pushing structure 34 pushes the well wall, thereby realizing 360° automatic adjustment of the tool face angle and automatic guiding. The material of the flexible short connection 19 is titanium alloy, copper alloy, etc., which has high strength and flexibility.

[0061] The second shell 27 is a protective shell for the related components such as the universal shaft 26, the control and communication electronic cabin 28 and the like; the water cap 29 is used for connecting the universal shaft 26 and the transmission shaft 40, and has a third flow hole 2901 (water cap flow hole) on the surface; and the third shell 36 is a protective shell for the related components such as the pushing structure 34, the sound emitter and receiver 37, the transmission shaft 40 and the like.

[0062] Further, as shown in FIG. 1, the anti-drop short circuit structure comprises an anti-drop shell 21, a fourth center hole is arranged axially in the anti-drop shell 21, a stop step is arranged in the fourth center hole; an anti-drop pull rod 23 is arranged in the fourth center hole, and the anti-drop pull rod 23 and the fourth center hole are radially spaced to form a third flow annulus, the annulus between the motor stator 24 and the motor rotor 25 is communicated with the third flow annulus; the end of the anti-drop pull rod 23 away from the drilling gyro system 20 is connected with the motor rotor 25, and the other end of the anti-drop pull rod 23 is connected with the anti-drop nut 22, which can be axially stopped by the stop step. When the lower shaft is broken, the anti-drop nut 22 is clamped at the stop step in the anti-drop short circuit to play the anti-drop role.

[0063] Further, as shown in FIG. 1, a fifth center hole is arranged axially through the second shell 27; a sixth center hole is arranged axially through the third shell 36; the universal shaft and the second shell are radially spaced to form a fourth flow annulus, the annulus between the motor stator 24 and the motor rotor 25 is communicated with the fourth flow annulus; the third flow hole 2901 of the water cap 29 is arranged to communicate the fourth flow annulus and the sixth center hole, the sixth center hole is communicated with the drill bit water eye 4101 of the drill bit 41; the annulus between the motor stator and the motor rotor, the fourth flow annulus, the third flow hole and the sixth center hole are communicated to form a mud downflow channel.

[0064] Further, as shown in FIG. 1, the end of the third shell 36 close to the drill bit 41 is connected with a lower short circuit 38 for end plugging and limiting; the third TC bearing and the second string bearing 35 are arranged between the transmission shaft 40 and the third shell 36, the second string bearing spacer and the second string bearing sleeve are arranged between the second string bearing 35 and the lower short circuit 38; the lower dynamic sleeve 39 is arranged between the lower short circuit and the transmission shaft.

[0065] The third TC bearing comprises a third TC bearing static sleeve 32 and a third TC bearing dynamic sleeve 33, the third TC bearing static sleeve 32, the third TC bearing dynamic sleeve 33, the lower short circuit 38 and the lower dynamic sleeve 39 function to radially centralize the transmission shaft 40 and can bear the lateral force; the second string bearing 35 bears the drilling pressure to promote the rotation of the transmission shaft 40.

[0066] Further, as shown in FIG. 1, a plurality of first installation grooves are arranged on the side wall of the third shell 36, and each first installation groove is inlaid with a pushing structure 34 and a pushing motor 31 respectively; a plurality of second installation grooves are also arranged on the side wall of the third shell 36, and each second installation groove is inlaid with a sound emitter and receiver 37.

[0067] In a specific embodiment of the present application, the pushing structure 34 and the sound emitting and receiving device 37 are inlaid on the third shell 36, the pushing structure 34 and the pushing motor 31 are three sets, each set has an angle of 60°, and the sound emitting and receiving device 37 can be 3-12 sets.

[0068] Further, as shown in FIG. 1 and FIG. 2, a first central hole is provided in the first shell 3 along the axial direction; the outer wall of the pulser 2 is radially spaced apart from the inner wall of the first central hole; the turbine group 6 and the generator 11 are arranged between the pulser 2 and the first shell 3; the first shell 3 is connected to the pulser upper joint 1 at the end away from the flexible short circuit 19, the pulser upper joint 1 is connected to the upper drill string, and the pulser upper joint 1 is provided with a joint notch 101;

[0069] A first TC bearing (as shown in FIG. 3 and FIG. 4, including a first TC bearing static sleeve 4 and a first TC bearing dynamic sleeve 5) is arranged between the end surface of the pulser upper joint 1 and the axial first end of the turbine group 6, as shown in FIG. 1 and FIG. 5, a turbine sheath 7, a turbine spacer 8, and a second TC bearing (including a second TC bearing static sleeve 9 and a second TC bearing dynamic sleeve 10) are arranged between the axial second end of the turbine group 6 and the axial first end of the generator 11, as shown in FIG. 6, a first string bearing 14, a first string bearing spacer 15, and a first string bearing sheath 16 are arranged between the axial second end of the generator 11 and the end surface of the flexible short circuit 19;

[0070] The first TC bearing is a radial bearing, which plays a radial righting role when the turbine group 6 rotates at high speed, and the contact surface of the first TC bearing static sleeve 4 and the first TC bearing dynamic sleeve 5 is inlaid with wear-resistant material (including but not limited to hard alloy and PDC composite sheet), which can play a lubricating role for a small amount of mud. The turbine sheath 7 and the turbine spacer 8 axially position the turbine group 6. The second TC bearing static sleeve 9 and the second TC bearing dynamic sleeve 10 play a radial righting role when the generator 11 rotates at high speed, the first string bearing 14 can promote the rotation of the generator 11, and the first string bearing spacer 15 and the first string bearing sheath 16 radially limit the first string bearing 14 and the pulser 2.

[0071] As shown in FIG. 1, a first flow channel annulus 102 is arranged between the pulser upper joint 1 and the pulser 2, a first flow channel hole 401 is axially provided on the first TC bearing, a second flow channel annulus is formed between the turbine sheath 7 and the turbine spacer 8 in a radial spacing manner, a pulser blind hole is arranged inward from the end close to the flexible short circuit in the pulser 2, and a second flow channel hole 201 is arranged on the side wall of the pulser 2 to communicate the second flow channel annulus and the pulser blind hole; a second central hole is axially provided in the flexible short circuit 19; and a third central hole is axially provided in the gyro outer shell;

[0072] The first flow channel annulus 102, the first flow channel hole 401, the turbine group 6, the second flow channel annulus, the second flow channel hole 201, the pulse blind hole, the second center hole, the third center hole and the fourth center hole are communicated to form a mud upflow channel.

[0073] The flow channel of the mud (the mud upflow channel and the mud downflow channel are communicated) is as follows: the drill string center hole (prior art) → the first flow channel annulus 102 → the first flow channel hole 401 → the turbine group 6 → the second flow channel annulus → the second flow channel hole 201 → the pulse blind hole → the second center hole → the third center hole → the fourth center hole → the annulus between the motor stator and the motor rotor → the fourth flow channel annulus → the third flow channel hole → the sixth center hole → the drill bit water hole 4101, which is returned to the ground through the annulus of the borehole and the drill string, filtered and recycled.

[0074] Further, as shown in FIG. 1, the bidirectional communication electronic cabin 13 is arranged in the side wall of the first shell 3, and the power supply channel 12 is used to electrically connect the bidirectional communication electronic cabin 13 to supply power for the bidirectional communication electronic cabin 13; the control and communication electronic cabin 28 is arranged in the side wall of the second shell 27, and the communication and power supply channel 17 is arranged through the side walls of the first shell 3, the flexible short circuit 19, the gyro outer shell, the anti-falling shell 21, the motor outer shell and the second shell 27, the bidirectional communication electronic cabin 13 is electrically connected to the control and communication electronic cabin 28 through the communication and power supply channel 17, the sound emission and support block control channel 30 is arranged in the side wall of the third shell 36, and the control and communication electronic cabin 28 is electrically connected to the push motor 31 and the sound emission and receiver 37 through the sound emission and support block control channel 30. Each shell is connected by threads; at the threaded connection, each section of the communication and power supply channel 17 is electrically connected through the circuit connection ring 18.

[0075] The power supply and communication path of the present application is as follows: the turbine group 6 → the power generator 11 → the power supply channel 12 → the bidirectional communication electronic cabin 13 ←→←→ the communication and power supply channel 17 ←→ the control and communication electronic cabin 28 ←→ the sound emission and support block control channel 30 ←→ the push motor 31 ←→ the sound emission and receiver 37.

[0076] The application uses: the upper part of the upper joint 1 of the pulser is connected with the drill string through threads, the mud enters the first flow channel annulus 102 through the central hole of the drill string, enters the turbine group 6 through the first flow channel hole 401, the rotation of the turbine group drives the rotation of the main shaft of the pulser, the rotation of the rotor of the generator generates current, the current supplies power to the two-way communication electronic cabin 13 through the power supply channel 12, the two-way communication electronic cabin 13 supplies power and signal transmission to the control and communication electronic cabin 28, the pushing motor 31 and the acoustic emission and receiver 37 through the communication and power supply channel 17, the circuit connection ring 18 and the acoustic emission and support block control channel 30, the two-way communication electronic cabin 13 can transmit relevant data such as the while-drilling gyro system 20 and the acoustic emission and receiver 37 to the ground control center 400, and can also transmit relevant instructions of the ground control center 400 to the control and communication electronic cabin 28 to control the opening of the pushing block in the pushing structure 34. The pushing structure 34 pushes against the well wall to make the flexible short circuit 19 produce bending deformation, so that automatic guiding is realized.

[0077] The application provides a use method of a while-drilling acoustic automatic tracking wellbore tool, which comprises the following steps (a flow chart is shown in FIG. 12):

[0078] Step a, connecting a drill string, a while-drilling acoustic automatic tracking wellbore tool and a drill bit, and lowering into a well;

[0079] Step b, emitting acoustic wave signals to the surrounding in a newly drilled borehole through an acoustic emission and receiver 37;

[0080] A schematic diagram of detecting a lower cavity 44 (or a cement plug) is shown in FIG. 7; a schematic diagram of detecting a lower casing breaking-off casing 46 is shown in FIG. 8, which comprises an upper casing 43, the lower casing breaking-off casing 46 and a casing breaking-off casing fish head 4601; a schematic diagram of detecting a lower fish 47 is shown in FIG. 9.

[0081] Step c, receiving return signals by the acoustic emission and receiver 37;

[0082] Step d, measuring the inclination and azimuth of the newly drilled borehole by a while-drilling gyro system 20;

[0083] Step e, transmitting the measured relevant data to a ground control center 400 through mud pulses, and interpreting and analyzing the relative distance and azimuth of the old borehole 42 and the newly drilled borehole 45, a cross section is shown in FIG. 10;

[0084] The used analysis and calculation formula is

[0085] Wherein, D is the relative distance of the old borehole 42 and the newly drilled borehole 45, d is the diameter of the old borehole 42, α is the minimum included angle of the old borehole relative to the newly drilled borehole and the north (N) direction, and β is the maximum included angle of the old borehole relative to the newly drilled borehole and the north (N) direction;

[0086] Step f, according to the measured data, the ground control center 400 sends instructions to the two-way communication electronic cabin 13, and the two-way communication electronic cabin 13 transmits the instructions to the control and communication electronic cabin 28;

[0087] Step g, the required orientation of the pushing motor 31 drives the pushing block in the pushing structure 34 to push against the well wall, as shown in FIG. 11;

[0088] Step h, real-time adjustment of the wellbore trajectory according to the measurement results;

[0089] Step i, entering the lower wellbore of the old wellbore.

[0090] From the above, the automatic wellbore tool for acoustic wave automatic tracking while drilling and the use method thereof provided by the present application have the following beneficial effects:

[0091] In the present application, the acoustic emission and measurement and control system emits acoustic wave signals in the new wellbore, receives return signals, and transmits the return signals to the communication system, achieving the purpose of drilling and measuring simultaneously, and accurately finding the lower casing, fish, cement plug, etc. The present application can enter the lower wellbore, control the pushing of the lower guiding system, realize 360° automatic adjustment of the tool face angle to complete the guiding, adjust the drilling attitude in real time according to the acoustic wave detection wellbore distance and direction, achieve the purpose of re-entering the old wellbore, and finally seal or expand the pipe to bridge and reuse according to the needs of the site.

[0092] The present application solves technical problems such as disposal of difficult wells in gas storage, environmental protection well treatment, casing breaking well re-production and reuse, etc. In the old oilfield ballast stone engineering, well pattern reconstruction can be achieved, the remaining oil potential can be greatly improved, and the purpose of stable production of crude oil can be achieved. In the gas storage construction field, the number of difficult old wells in the early stage is large, and the area cannot be effectively disposed. The construction of gas storage has become possible, which ensures energy security. In the environmental protection well treatment field, the old wellbore is re-entered, the lower casing breaking well is completely sealed, and the difficult environmental protection well treatment problem that has plagued the oilfield for many years is solved.

[0093] The above is only a specific embodiment of the present application, and is not intended to limit the scope of the present application. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present application shall fall within the scope of protection of the present application.

Claims

1. A while-drilling acoustic automatic wellbore tracking tool, wherein, Comprise sequentially arranged: A power generation and communication system, comprising a power generation system for generating electricity from power generation, and a communication system electrically connected with a ground control center for bidirectional transmission of measurement data and control instructions; A power and measurement and control system, comprising a measurement while drilling system for measuring inclination and azimuth data of a new borehole and transmitting data to the communication system, a power motor for converting mud hydraulic energy into mechanical energy, and a measurement and control system comprising a control and communication electronic cabin electrically connected with the communication system; An acoustic wave measurement and steering system, comprising an acoustic emission and measurement and control system for emitting acoustic wave signals in a new borehole, receiving return signals, and transmitting return signals to the communication system, a steering system, and a transmission system for transmitting mechanical energy of the power motor to a drill bit; the steering system is automatically guided against the well wall under the control of the control and communication electronic cabin to adjust the borehole trajectory.

2. The acoustic while-drilling auto-tracking wellbore tool of claim 1, wherein, The power generation system comprises a pulser, a turbine set, and a generator, the turbine set and the generator are sleeved on the pulser, the turbine set can drive the pulser to rotate under the action of mud, the pulser rotates to make the generator generate electricity, the generator is electrically connected with the power and measurement and control system and the acoustic wave measurement and steering system; the communication system comprises a bidirectional communication electronic cabin, the generator is electrically connected with the bidirectional communication electronic cabin; the bidirectional communication electronic cabin is used for bidirectional communication of the power and measurement and control system, the acoustic wave measurement and steering system, and the ground control center.

3. The acoustic while-drilling auto-tracking wellbore tool of claim 2, wherein, The acoustic emission and measurement and control system comprises an acoustic emission and receiver electrically connected with the bidirectional communication electronic cabin, the acoustic emission and receiver is used for emitting acoustic wave signals in a new borehole, receiving return signals, and transmitting return signals to the bidirectional communication electronic cabin.

4. The acoustic while-drilling auto-track hole tool of claim 3, wherein, The steering system comprises a push structure and a push motor, the push motor is electrically connected with the bidirectional communication electronic cabin, the push structure comprises a push block, the push motor can drive the push block to extend radially to push against the well wall.

5. The acoustic while-drilling auto-track hole tool of claim 4, wherein, The power motor comprises a motor outer shell, a motor stator, and a motor rotor, the transmission system comprises a universal shaft, a water cap, and a transmission shaft, the universal shaft is fixedly connected with the motor rotor, the universal shaft is connected with the transmission shaft through the water cap, and the transmission shaft is connected with a drill bit; the motor rotor drives the universal shaft, the water cap, the transmission shaft, and the drill bit to rotate under the action of mud hydraulic energy.

6. The acoustic while-drilling auto-track hole tool of claim 5, wherein, The power generation and communication system is arranged in the first shell, the measurement while drilling system is the drilling gyro system, the first shell is connected to the gyro outer shell through a flexible short circuit, the gyro outer shell is connected to the power motor through an anti-falling short circuit structure, the motor outer shell is connected to the second shell and the third shell at the end away from the drilling gyro system, the control and communication electronic cabin is arranged on the second shell, the acoustic emission and measurement and control system and the steering system are arranged on the third shell, and the transmission system is connected to the drill bit after passing through the second shell and the third shell.

7. The acoustic while-drilling auto-track hole tool of claim 6, wherein, The anti-falling short circuit structure comprises an anti-falling shell, a fourth central hole is arranged in the anti-falling shell in the axial direction, a stop step part is arranged in the fourth central hole, an anti-falling pull rod is arranged in the fourth central hole, a third flow channel annulus is formed between the anti-falling pull rod and the fourth central hole in the radial direction, the annulus between the motor stator and the motor rotor is communicated with the third flow channel annulus, the anti-falling pull rod is connected to the motor rotor at the end away from the drilling gyro system, and the other end of the anti-falling pull rod is connected to an anti-falling nut which can be axially stopped by the stop step part.

8. The acoustic while-drilling auto-track hole tool of claim 7, wherein, A fifth central hole is arranged in the second shell in the axial direction, a sixth central hole is arranged in the third shell in the axial direction, a fourth flow channel annulus is formed between the universal shaft and the second shell in the radial direction, the annulus between the motor stator and the motor rotor is communicated with the fourth flow channel annulus, a third flow channel hole communicating the fourth flow channel annulus and the sixth central hole is arranged on the water cap, the sixth central hole is communicated with the drill bit water eye of the drill bit, and the annulus between the motor stator and the motor rotor, the fourth flow channel annulus, the third flow channel hole and the sixth central hole are communicated to form a mud downflow channel.

9. The acoustic while-drilling auto-track hole tool of claim 7, wherein, The third shell is connected to a lower short circuit for end plugging and limiting at the end close to the drill bit, a third TC bearing and a second string bearing are arranged between the transmission shaft and the third shell, a second string bearing spacer sleeve and a second string bearing sleeve are arranged between the second string bearing and the lower short circuit, and a lower dynamic sleeve is arranged between the lower short circuit and the transmission shaft.

10. The acoustic while-drilling auto-tracking wellbore tool of claim 7, wherein, A plurality of first installation grooves are arranged on the side wall of the third shell, one push structure and one push motor are respectively embedded in each first installation groove, a plurality of second installation grooves are further arranged on the side wall of the third shell, and one acoustic emission and receiver is respectively embedded in each second installation groove.

11. The acoustic while-drilling auto-tracking wellbore tool of claim 7, wherein, The first shell has a first central hole axially through it; the outer wall of the pulser is radially spaced from the inner wall of the first central hole; the turbine group and the generator are disposed between the pulser and the first shell; the first shell, away from the end of the flexible short, is connected to the upper joint of the pulser, the end surface of the upper joint of the pulser and the axial first end of the turbine group are provided with a first TC bearing, the axial second end of the turbine group and the axial first end of the generator are provided with a turbine sheath, a turbine spacer, and a second TC bearing, and the axial second end of the generator and the end surface of the flexible short are provided with a first string bearing, a first string bearing spacer, and a first string bearing sheath; The upper joint of the pulser and the pulser are provided with a first flow channel annulus, the first TC bearing has a first flow channel hole axially through it, the turbine sheath and the turbine spacer are radially spaced to form a second flow channel annulus, the pulser has a pulser blind hole disposed inward from the end close to the flexible short, and the side wall of the pulser is provided with a second flow channel hole that connects the second flow channel annulus and the pulser blind hole; the flexible short has a second central hole axially through it; and the gyro outer shell has a third central hole axially through it. The first flow channel annulus, the first flow channel hole, the turbine group, the second flow channel annulus, the second flow channel hole, the pulser blind hole, the second central hole, the third central hole, and the fourth central hole are connected to form a mud upflow channel.

12. The acoustic while-drilling auto-tracking wellbore tool of claim 7, wherein, The bidirectional communication electronic cabin is disposed in the side wall of the first shell, and the generator is electrically connected to the bidirectional communication electronic cabin through a power supply channel to supply power to it; The control and communication electronic cabin is disposed in the side wall of the second shell, the side walls of the first shell, the flexible short, the gyro outer shell, the anti-drop shell, the motor outer shell, and the second shell are provided with a communication and power supply channel, the bidirectional communication electronic cabin is electrically connected to the control and communication electronic cabin through the communication and power supply channel, the side wall of the third shell is provided with a sound emission and support block control channel, and the control and communication electronic cabin is electrically connected to the push block motor and the sound emission and receiver through the sound emission and support block control channel.

13. A method of using a sonic while-drilling auto-tracking wellbore tool as claimed in any one of claims 1 to 12, wherein, The method comprises the following steps: Step a, connecting the drill string, the while-drilling acoustic automatic tracking wellbore tool, and the drill bit, and lowering them into the well; Step b, emitting acoustic wave signals to the surroundings through the sound emission and receiver in the newly drilled borehole; Step c, receiving the return signals by the sound emission and receiver; Step d, measuring the inclination and azimuth of the newly drilled borehole by the while-drilling gyro system; Step e, transmitting the measured data to the ground control center through mud pulses, and interpreting and analyzing the relative distance and azimuth of the old borehole and the newly drilled borehole; Step f, according to the measured data, the ground control center sends instructions to the bidirectional communication electronic cabin, and the bidirectional communication electronic cabin transmits the instructions to the control and communication electronic cabin; Step g, the push block motor of the required azimuth works to drive the push block in the push structure to push against the well wall; Step h, adjusting the borehole trajectory in real time according to the measurement results; Step i, entering the lower wellbore of the old borehole.

Images