WO2021143461A1 - 一种剪切式泥浆脉冲发生装置 - Google Patents

一种剪切式泥浆脉冲发生装置 Download PDF

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Publication number
WO2021143461A1
WO2021143461A1 PCT/CN2020/137929 CN2020137929W WO2021143461A1 WO 2021143461 A1 WO2021143461 A1 WO 2021143461A1 CN 2020137929 W CN2020137929 W CN 2020137929W WO 2021143461 A1 WO2021143461 A1 WO 2021143461A1
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WIPO (PCT)
Prior art keywords
rotor
plunger
balance
oil
housing
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PCT/CN2020/137929
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English (en)
French (fr)
Chinese (zh)
Inventor
刘庆波
底青云
王向阳
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中国科学院地质与地球物理研究所
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Application filed by 中国科学院地质与地球物理研究所 filed Critical 中国科学院地质与地球物理研究所
Priority to JP2021507517A priority Critical patent/JP7084547B2/ja
Publication of WO2021143461A1 publication Critical patent/WO2021143461A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
    • E21B47/18—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry

Definitions

  • the application belongs to the technical field of petroleum downhole instruments, and specifically relates to a shearing mud pulse generator.
  • the measurement-while-drilling system in the oil drilling process undertakes the function of borehole trajectory parameter measurement.
  • the downhole information upload device needs to be used to upload the bottom hole parameters.
  • the two commonly used information upload methods are electromagnetic wave and mud pulse information. Upload method.
  • the electromagnetic wave signal transmission is obviously limited by the depth of the well. It is not suitable for deep wells.
  • the way of uploading information in the form of mud pulse is more common.
  • the downhole control system converts the downhole parameter information into a pressure pulse signal and transmits it to the surface through an appropriate encoding method.
  • the downhole information decoding function is realized through the bottom hole pressure signal acquisition system.
  • the mud pulse generator needs the realization of mechanical action to realize the generation of the pressure signal.
  • the common driving forms include solenoid valve drive and motor drive.
  • One is a reciprocating pulse generator.
  • a shear valve pulse generator such as APS company's shear valve pulse generator.
  • the system's action assembly must first be filled with oil to complete the downhole pressure balance setting function of the system.
  • there is a problem of dynamic sealing due to the existence of mechanical action, there is a problem of dynamic sealing.
  • the working environment of downhole instruments is very harsh, and the performance of downhole rotary sealing directly affects the working life of the entire downhole instrument.
  • the dynamic seal of the mud pulse generator currently seen on the market is prone to mud intrusion during the actual working process. This will cause the instrument to malfunction.
  • CN104481518A discloses an oscillating shear mud pulse generator and a control method.
  • the fishing head is placed upstream of the mud, the electrical components are placed downstream of the mud, the fishing head is connected with the stator suspension cylinder, and the rotary valve stator and the rotary valve rotor are both installed Inside the stator suspension cylinder; the rotary valve stator is compressed in the stator suspension cylinder by the guide stator gland, and the rotary valve rotor is driven by the drive shaft; the pressure balance sealing module, the motor, the rotation angle detection module and the drive shaft are respectively installed inside the compression cylinder ,
  • the pressure balance sealing module is located in the middle of the pressure resistant cylinder and is installed between the drive shaft and the pressure resistant cylinder; the pressure balancing sealing module includes the inner piston guide sleeve, the main balancing piston, the motor sealing piston, and the outer piston guide sleeve.
  • the main balancing piston is close to the bearing Installed on the piston inner guide sleeve, the piston inner guide sleeve is fixed in the piston outer guide tube, the main balance piston divides the piston outer guide tube into two spaces, upstream and downstream, and the upstream piston outer guide tube of the main balance piston is filled with oil Hole, there is a mud flow hole on the outer guide cylinder of the downstream piston, which is used to balance the pressure inside and outside the outer guide cylinder of the piston.
  • the motor seal piston isolates the motor independently, and the piston guide sleeve restricts its axial movement to play a secondary seal. effect.
  • the existing mud pulse generators have the following problems: the rotor drive shaft has a large inertia, the control is difficult, the system energy consumption is high, and the piston part is arranged between the rotor part and the stator part, that is, the piston part is located on both sides of the piston part.
  • the large state difference leads to poor sealing effect and easy failure of sealing parts.
  • a shearing mud pulse generator which includes a pulse generator, a drive part, and a housing.
  • the pulse generator includes a stator and a rotor that are matched to each other.
  • the rotor is provided with mud flow holes;
  • the driving part includes a motor and a rotor driving part, one end of the rotor driving part is connected to the motor shaft, and the other end of the rotor driving part is connected to the rotor;
  • the shell The body is arranged on the periphery of the driving part, and there is an oil-immersed space between the driving part and the inner wall of the housing; a hollow part is provided in the rotor driving part, and one end of the hollow part is in communication with the outside.
  • the other end of the hollow part is a blind hole, the side wall of the hollow part is provided with an oil through hole communicating with the oil immersion space, and a first balance plunger is provided in the hollow part.
  • This application uses a motor to directly drive the rotor, and generates mud pressure waves through changes in the relative rotation positions of the rotor and the stator.
  • the structure is simple and reliable, and can realize high-speed data transmission; the hollow rotor drive part is arranged in a hollow space, which reduces the drive shaft of the rotor on the one hand. Inertia, the control is easier to achieve, and the system power consumption is effectively reduced.
  • the hollow setting of the rotor drive part increases the oil immersion space
  • the redundant setting of the space is more conducive to the entire structure to cope with the changes of the internal and external environment;
  • the oil immersion depth in the oil immersion space is greater, which further reduces the risk of mud intrusion and greatly increases the life and reliability of the entire structure.
  • the application is further provided with a first balance plunger in the hollow portion, and the first balance plunger is used to adapt to changes in internal and external temperature and pressure and to effectively compensate for such changes to further prevent mud intrusion.
  • the first balance plunger Plugged in the rotor drive shaft the state of the periphery is the same. Such a structure will greatly increase its sealing effect.
  • stator is connected to one end of the housing, the end of the rotor drive part away from the motor passes through the stator and the rotor in an axial direction, and the side wall of the rotor drive part passes through a key structure.
  • the hollow portion extends from one end of the rotor drive member in the axial direction toward the motor direction.
  • the rotor is arranged on the outside of the stator. This arrangement makes the structure better meet the needs of the site and facilitates the replacement of the rotor.
  • the second balance plunger in this application is to prevent mud from entering the space between the rotor drive and the housing; on the other hand, the second balance piston communicates with the first balance piston through the oil through hole to increase the size.
  • the movable space of the hydraulic oil makes the two balance pistons work together to increase the adaptability to environmental changes.
  • a retaining ring for limiting the position of the second balance plunger is provided on the outer wall of the rotor drive member, and the retaining ring is provided between the oil through hole and the rotor in the axial direction, so The second balance plunger is arranged between the retaining ring and the rotor.
  • the retaining ring is used to limit the position of the second balance plunger to prevent the second balance plunger from blocking the oil through hole.
  • the second balance plunger includes a second plunger body, a first sealing member, and a second sealing member, and the first sealing member is disposed at an end of the second plunger body close to the rotor drive member
  • the second sealing element is arranged at an end of the second plunger body close to the inner wall of the housing.
  • the second balance plunger in the present application mainly has a rotary dynamic sealing function. When the pressure and temperature are high and the first plunger reaches the maximum limit compensation position, the second balance plunger can also reciprocate for pressure compensation. Another function of the second balance plunger is that when the first balance plunger is installed after being filled with oil, the second balance plunger can automatically adjust its position to adapt to changes in oil volume, making the first balance plunger more stable and reducing disadvantages. The shaking.
  • the third balance plunger is disposed between the motor shaft and the housing, the third balance plunger includes a third plunger body, and the third balance plunger
  • An oil passage and a one-way valve are provided in the plunger body. One end of the one-way valve is connected to the oil passage, the other end of the one-way valve is connected to the oil immersion space, and the third column
  • a third sealing element is provided at one end of the plug body close to the motor shaft, and a fourth sealing element is provided at one end of the third plunger body close to the inner wall of the housing.
  • the main purpose of the third balance plunger in the present application is to protect the motor. Even if the first balance plunger fails, it can still ensure that the motor is not affected by mud intrusion.
  • the first balance plunger includes a first plunger body, a flange is provided on the periphery of the middle of the first plunger body, and a plurality of flanges for placing fifth seals are provided along the circumference of the flange. Groove. Since the first balance plunger continuously reciprocates in the hollow part when it is working, the groove is provided for the installation of the seal on the one hand, and on the other hand to avoid stress concentration and minimize the gap between it and the inner wall of the hollow part. Wear and improve its service life.
  • the hollow portion extends from one end of the rotor drive member to the middle of the rotor drive member, the oil through hole is provided at an end of the hollow portion away from the rotor, and one end of the rotor drive member is provided for
  • the plug for limiting the position of the first balance plunger, one end of the rotor driving part is provided with a clamping groove for placing the plug.
  • the plug is used for the mechanical limit of the first balance plunger, and on the other hand, it is used as the oil outlet of the pulse generator when filling the oil.
  • the salvage piece also includes a salvage piece, one end of the salvage piece is connected with the rotor, and the salvage piece is arranged on the periphery of the rotor drive part.
  • the salvage piece is used to assist the installation and disassembly of the entire pulse generator in the drill collar.
  • the tail connecting part is connected with the housing by a thread
  • the tail connecting part includes a jack, a tail connector, and a pressure connector
  • one end of the jack is connected to One end of the motor away from the rotor drive part is connected
  • the other end of the tightening part is connected to the tail connector
  • the other end of the tail connector is connected to the pressure-bearing connector.
  • the tightening member is used to ensure that the motor components are installed in place during the assembly process, and the inside is a hollow structure, which can store the lead wires of the motor tail.
  • the oil filling hole is arranged on the housing, and the oil inlet hole is arranged at the end of the housing away from the rotor.
  • This arrangement enables the one-way valve in the third balance plunger to function, and the oil inlet hole
  • the hydraulic oil and the oil outlet are located at both ends of the third balance plunger respectively.
  • the hydraulic oil can only flow from the oil inlet to the oil outlet, and it can only flow in one direction, not in the reverse direction.
  • the mud is placed to the greatest extent to protect the motor.
  • the hollow setting of the rotor drive part reduces the inertia of the rotor drive shaft on the one hand, makes the control easier to implement, and effectively reduces the power consumption of the system.
  • the hollow setting of the rotor drive part increases oil immersion.
  • the redundant setting of space and space is more conducive to the entire structure to cope with changes in environmental pressure and temperature; on the other hand, the oil immersion depth of the oil immersion space is greater, further reducing the risk of mud intrusion, and greatly increasing the life and reliability of the entire structure sex;
  • a first balance plunger is further provided in the hollow portion, and the first balance plunger is used to adapt to changes in external temperature and pressure and effectively compensate for such changes to further prevent mud intrusion;
  • the rotor is arranged on the outside of the stator. This arrangement makes the structure better meet the needs of the site and facilitate the replacement of the rotor;
  • the second balance plunger in this application is to prevent mud from entering the space between the rotor drive and the housing; on the other hand, the second balance piston is connected to the first balance piston through the oil hole. Larger space for the hydraulic oil, so that the two balance pistons can work together to increase the adaptability to environmental changes;
  • the main purpose of the third balance plunger in this application is to protect the motor. Even if both the first balance plunger and the second balance plunger fail, the motor can still be protected from mud intrusion.
  • Figure 1 is a schematic structural diagram of a pulse generator in this application
  • FIG. 2 is a schematic structural diagram of another pulse generator in this application.
  • FIG. 3 is a schematic structural diagram of another pulse generator in this application.
  • Figure 4 is a schematic diagram of the structure of the first balance plunger in this application.
  • FIG. 5 is a schematic diagram of the structure of the third balance plunger in this application.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present application, “multiple” means two or more than two, unless otherwise specifically defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be a mechanical connection, it can be an electrical connection, it can also be communication; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two components or the interaction relationship between two components .
  • installed can be a fixed connection or a detachable connection , Or integrated; it can be a mechanical connection, it can be an electrical connection, it can also be communication; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two components or the interaction relationship between two components .
  • the first feature “on” or “under” the second feature may be in direct contact with the first and second features, or the first and second features may be indirectly through an intermediary. get in touch with.
  • descriptions with reference to the terms “one embodiment”, “some embodiments”, “examples”, “specific examples”, or “some examples” etc. mean specific features described in conjunction with the embodiment or example .
  • the structure, materials, or characteristics are included in at least one embodiment or example of the present application.
  • the schematic representations of the above terms do not necessarily refer to the same embodiment or example.
  • the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
  • a shearing type mud pulse generator as shown in Figures 1 to 3, includes a pulse generator 1, a drive unit 2 and a housing 3.
  • the pulse generator 1 includes a stator 11 and a rotor 12 that are matched to each other. Both the stator 11 and the rotor 12 are provided with mud flow holes 4;
  • the driving part 2 includes a motor 21 and a rotor driving part 22, one end of the rotor driving part 22 is connected to the shaft of the motor 21, and the other end of the rotor driving part 22 is connected to the rotor 12;
  • the housing 3 is arranged on the periphery of the driving part 2.
  • a hollow part 6 is provided in the rotor driving member 22, and one end of the hollow part 6 is in communication with the outside, and the hollow part 6 The other end is a blind hole.
  • the side wall of the hollow portion 6 is provided with an oil through hole 61 communicating with the oil immersion space 5, and the hollow portion 6 is provided with a first balance plunger 62.
  • the shearing mud pulse generator in this embodiment When in use, the shearing mud pulse generator in this embodiment is installed in the drill collar, and the rotor 12 generates shearing motion under the drive of the driving part 2, and the flow area of the mud flow hole 4 will continue to change. Pressure waves will be generated during the change process. Through appropriate motion control strategies, the movement of the rotor 12 can generate pressure waves with certain coding rules.
  • the ground system collects the pressure wave changes through the pressure signal acquisition device and decodes them, and then Obtain useful measurement data downhole; while the hollow part 6 and the oil immersion space 5 are immersed in oil to prevent mud from entering and affect the normal use of the structure.
  • the first balance plunger 62 is set in the hollow part 6 to isolate the mud and Hydraulic oil, and automatically compensate the influence of internal and external environmental temperature and pressure changes on the system.
  • the oil immersion space 5 and the hollow part 6 need to be filled with oil.
  • the first balance plunger 62 is removed, the hydraulic oil is immersed into the oil immersion space 5 from the oil filling port 102, and further passes through The oil hole 61 enters the hollow portion 6, and after oil filling, the first balance plunger 62 is inserted into the hollow portion 6, and the oil filling operation is completed.
  • the first balance plunger 62 can reciprocate in the hollow portion 6 to adapt to this change, thereby effectively preventing mud Enter.
  • stator 11 is connected to one end of the housing 3, and the end of the rotor driving member 22 away from the motor 21 passes through the stator 11 and the rotor 12 in the axial direction.
  • the side wall of the rotor driving member 22 is connected to the rotor 12 through a key 221 structure.
  • the hollow portion 6 extends from one end of the rotor drive member 22 in the axial direction toward the motor 21 direction.
  • the hollow portion 6 extends from one end of the rotor drive member 22 to the middle of the rotor drive member 22, the oil through hole is provided at the end of the hollow portion away from the rotor, and one end of the rotor drive member 22 is provided with a first balance plunger 62 for limiting.
  • the plug 63 is positioned, one end of the rotor drive member 22 is provided with a clamping groove for placing the plug 63.
  • the function of the plug 63 is to act as an oil outlet during the oil filling stage. When filling the oil, the plug 63 and the first balance plunger 62 are removed, and the first balance plunger 62 is inserted into the hollow after the oil is filled. Part 6, and then insert the plug 63 into the clamping groove; on the other hand, the plug 63 can limit the first balance plunger 62 and prevent the first balance plunger 62 from falling from the hollow portion 6. .
  • the length of the adjustment key 221 can adjust the gap, and by changing a different combination of the rotor 12 and the stator 11, the amplitude of the mud pressure wave signal can be adjusted.
  • the driving part 2 in this embodiment is immersed in oil, which is also conducive to heat dissipation of the system.
  • the rotor 12 in this embodiment can either continuously rotate or reciprocate oscillating shear, depending on the control strategy of the motor 21.
  • the first balance plunger 62 includes a first plunger body 621.
  • a flange 622 is provided on the periphery of the middle of the first plunger body 621.
  • the flange 622 is provided with a plurality of The groove 623 of the fifth seal 624 is placed.
  • the fifth sealing member 624 may be an O-ring or other types of sealing rings.
  • bearings 31 are provided between the driving part 2 and the housing 3 to realize the movement isolation between the rotor driving part 22 and the housing 3, which can be radial bearings, angular contact bearings or other types of bearings. Types of.
  • connection between the output shaft of the motor 21 and the rotor drive part can be driven by the key 221, or the output shaft of the motor 21 can be inserted into the tail of the rotor drive part 22 in a deformed cross-sectional shape, so that the output torque of the motor 21 is finally applied to the rotor.
  • the desired mud pressure waveform change is generated by controlling the rotation speed of the motor 21.
  • the motor 21 can be a brushless DC motor, a brushed motor, a stepper motor, a permanent magnet synchronous motor or other types of motors.
  • it can be equipped with a reducer and encoder. Or resolver together.
  • a sealing structure in order to prevent mud from entering the space between the rotor drive and the housing, a sealing structure can be installed in this space.
  • the sealing structure can be a static seal such as a sealed bearing, or a dynamic seal. It is sufficient that the sealing structure does not hinder the communication between the oil through hole and the oil immersion space.
  • This embodiment further includes a second balance plunger 7 on the basis of Embodiment 1. As shown in Figs. 1 to 3, the second balance plunger 7 is provided between the rotor drive part 22 and the housing 3, and the second balance The plunger 7 is provided between the oil through hole 61 and the rotor 12 in the axial direction.
  • the second balance plunger 7 is mainly used to prevent mud from entering the space between the rotor drive 22 and the housing 3 under normal conditions, and the second balance plunger 7 mainly rotates
  • the dynamic sealing function is the main function.
  • the second balance plunger 7 and the first balance plunger 62 in Embodiment 1 can also cooperate with each other for reciprocating motion; when the external mud pressure is large, the first balance piston faces the motor The 21-direction movement is used for pressure compensation, but when the external pressure and temperature are high and the first plunger reaches the maximum limit compensation position, the second balance plunger 7 can also reciprocate for pressure compensation; and when the temperature and pressure are high,
  • the hydraulic oil has a larger internal movement space, which can disperse the adverse effects caused by the volume expansion of the hydraulic oil.
  • another function of the second balance plunger 7 is that when the first balance plunger 62 is installed after being filled
  • a retaining ring 71 for limiting the position of the second balance plunger 7 is provided on the outer wall of the rotor drive member 22, and the retaining ring 71 is provided between the oil through hole 61 and the rotor 12 in the axial direction, and the second balance column
  • the plug 7 is provided between the retaining ring 71 and the rotor 12.
  • the retaining ring 71 is provided to limit the movement range of the second balance plunger 7 and prevent the second balance plunger 7 from blocking the oil through hole 61 during use.
  • the second balance plunger 7 includes a second plunger body 72, a first sealing member 73, and a second sealing member 74.
  • the first sealing member 73 is disposed at an end of the second plunger body 72 close to the rotor driving member 22.
  • the second sealing element 74 is disposed at one end of the second plunger body 72 close to the inner wall of the housing 3.
  • first seal 73 and the second seal 74 are rotary seals, which may be O-rings or other types of rotary dynamic seals, such as star rings, V-rings, and so on.
  • the third balance plunger 8 is provided between the shaft of the motor 21 and the housing 3, as shown in Figure 5,
  • the three-balance plunger 8 includes a third plunger body 81.
  • the third plunger body 81 is provided with an oil passage 811 and a one-way valve 812. One end of the one-way valve 812 is in communication with the oil passage 811, and the other one-way valve 812 One end communicates with the oil immersion space 5, a third seal 813 is provided at one end of the third plunger body 81 close to the shaft of the motor 21, and a fourth seal 814 is provided at one end of the third plunger body 81 close to the inner wall of the housing 3.
  • the third balance plunger 8 When working, the third balance plunger 8 is used to protect the motor 21 and place mud into the motor 21.
  • the third balance plunger 8 is provided with a check valve 812, so that the liquid can only flow in one direction, that is, it can only flow from the motor 21.
  • One end flows toward one end of the rotor drive member 22, but cannot flow in the reverse direction; this ensures that even if the first and second balance plungers 7 have a seal leak, the third balance plunger 8 can still function, protecting the motor
  • the security of 21 can improve the reliability of the system.
  • the third seal 813 and the fourth seal 814 are dynamic seals, which may be O-rings, V-rings, star-shaped rings, or other types of sealing rings.
  • it further includes a salvaging piece 101, one end of the salvaging piece 101 is connected to the rotor 12, and the salvaging piece 101 is disposed on the periphery of the rotor driving member 22.
  • the salvage piece 101 is used to assist the installation and removal functions of the entire pulse generator in the drill collar.
  • the tail connecting portion 9 includes a jack 91, a tail connector 92 and a pressure-bearing connector 93.
  • One end of the tightening member 91 is connected to the end of the motor 21 away from the rotor drive member 22, the other end of the tightening member 91 is connected to the tail connector 92, and the other end of the tail connector 92 is connected to the pressure-bearing connector 93.
  • the tightening member 91 is used to ensure that the motor 21 is installed in place during the assembly process, and has a hollow structure inside, which can store the tail lead wire of the motor 21.
  • One end of the tail connector 92 is connected to the lead wire of the motor 21 of the motor 21, and the other end is connected to the external drive controller through the pressure-bearing connector 93.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
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  • Acoustics & Sound (AREA)
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  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
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PCT/CN2020/137929 2020-01-17 2020-12-21 一种剪切式泥浆脉冲发生装置 WO2021143461A1 (zh)

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JP2021507517A JP7084547B2 (ja) 2020-01-17 2020-12-21 せん断式スラリーパルス発生装置

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CN202010053924.3A CN111236930B (zh) 2020-01-17 2020-01-17 一种剪切式泥浆脉冲发生装置

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CN111236930B (zh) * 2020-01-17 2020-11-10 中国科学院地质与地球物理研究所 一种剪切式泥浆脉冲发生装置
CN115999392A (zh) * 2022-12-07 2023-04-25 深圳市尚水智能股份有限公司 一种离心式分散装置

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