Dual-source multi-mode direct-drive power supply control system and managed pressure drilling system

Abstract

The utility model provides a kind of double-source multi-mode direct drive power control system and pressure control drilling system, it is related to petroleum drilling technical field, direct drive power control system includes: battery management control system, ac servo driver, control signal power supply and DC power battery package;When direct drive power control system is in ac parallel control mode: battery management control system, ac servo driver are sequentially connected;Battery management control system, ac servo driver are also connected with control signal power supply and DC power battery package respectively;When direct drive power control system is in series charging control mode: battery management control system, control signal power supply, ac servo driver are sequentially connected;Battery management control system is also connected with DC power battery package;DC power battery package is also connected with ac servo driver.The utility model is strong in adaptability, can maintain working stability according to the different electric power supply situation of field.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling technology, specifically to a dual-source multi-mode direct-drive power control system and a pressure-controlled drilling system. Background Technology

[0002] Precision pressure controlled drilling technology is a key technology in modern oil and gas development. Its main function is to improve the safety and efficiency of drilling operations by precisely controlling the annular pressure during the drilling process to adapt to complex formation pressure systems. With the continuous deepening of oil and gas exploration and development, the requirements for drilling technology are becoming increasingly stringent, leading to widespread attention and development of precision pressure controlled drilling technology.

[0003] Electric pressure controlled drilling equipment plays a crucial role in the development trend of precision pressure controlled drilling technology by improving the accuracy, efficiency and safety of drilling operations. This is mainly reflected in: (1) Improving the accuracy of precision pressure control: Electric pressure controlled drilling equipment adopts an advanced electric drive system, which can achieve millisecond-level response speed and micro-megapascal-level pressure control accuracy. This high-precision pressure control is the key to the development of precision pressure controlled drilling technology, which can effectively cope with complex formation pressure systems and reduce drilling risks. (2) Improving continuous operation capability.

[0004] Oil and gas wells are generally located in the field, remote mountainous areas or offshore. Ensuring a reliable power supply for controlled pressure drilling equipment is one of the challenges of controlled pressure drilling technology.

[0005] Therefore, in view of the risks of insufficient power supply or power outage in existing pressure-controlled drilling equipment, this utility model proposes a dual-source multi-mode direct-drive power control system and a pressure-controlled drilling system. Utility Model Content

[0006] To address the problems of the prior art, the purpose of this utility model is to propose a dual-source multi-mode direct-drive power control system and a pressure-controlled drilling system, which enables switching between multiple power supply modes to ensure the stable operation of drilling and production equipment in the face of unstable power supply in the field.

[0007] This utility model provides a dual-source multi-mode direct-drive power control system, which includes: a battery management control system (2), an AC / DC servo driver (3), a control signal power supply (4), and a DC power battery pack (61).

[0008] When the direct drive power control system is in AC / DC parallel control mode: the battery management control system (2) and the AC / DC servo driver (3) are connected in sequence; the battery management control system (2) and the AC / DC servo driver (3) are also connected to the control signal power supply (4) and the DC power battery pack (61) respectively.

[0009] When the direct drive power control system is in series charging control mode: the battery management control system (2), the control signal power supply (4), and the AC / DC servo driver (3) are connected in sequence; the battery management control system (2) is also connected to the DC power battery pack (61); the DC power battery pack (61) is also connected to the AC / DC servo driver (3).

[0010] According to one embodiment of the present invention, when the on-site power and voltage meet the requirements of the drilling and production equipment, the direct drive power control system is in the AC / DC parallel control mode.

[0011] According to one embodiment of the present invention, when the on-site power or voltage does not meet the requirements of the drilling and production equipment, the direct drive power control system is in the series charging control mode.

[0012] According to one embodiment of the present invention, the direct-drive power control system further includes a pure battery control mode, wherein in the pure battery control mode:

[0013] The DC power battery pack (61) and the AC / DC servo driver (3) are connected in sequence;

[0014] The AC / DC servo driver (3) is also connected to the battery management control system (2);

[0015] The battery management and control system (2) is also connected to the DC power battery pack (61).

[0016] According to one embodiment of the present invention, when there is a power failure on site, the direct-drive power control system is in the pure battery control mode.

[0017] According to one embodiment of the present invention, the direct-drive power control system further includes a low-voltage overdrive control mode; in the low-voltage overdrive control mode, the direct-drive power control system further includes an overdrive battery pack (62).

[0018] According to one embodiment of the present invention, when the direct-drive power control system is in the low-voltage overdrive control mode:

[0019] The super-control battery pack (62) and the AC / DC servo driver (3) are connected in sequence;

[0020] The AC / DC servo driver (3) is also connected to the battery management control system (2);

[0021] The battery management and control system (2) is also connected to the control signal power supply (4) and the super control battery pack (62);

[0022] The control signal power supply (4) is also connected to the AC / DC servo driver (3).

[0023] According to one embodiment of the present invention, when there is a power failure on site and the power of the DC power battery pack (61) does not meet the requirements of the drilling and production equipment, the direct drive power control system is in the low-voltage overdrive control mode.

[0024] According to another aspect of the present invention, a pressure-controlled drilling system is also provided, the pressure-controlled drilling system comprising a direct-drive power control system as described in any of the preceding claims.

[0025] According to one embodiment of the present invention, the pressure-controlled drilling system further includes:

[0026] A high-voltage AC power source (1) is used to supply power to the battery management and control system (2);

[0027] The controlled mechanism is used to receive drive commands from the AC / DC servo driver (3).

[0028] This invention provides a dual-source multi-mode direct-drive power control system and a pressure-controlled drilling system, which have the following advantages compared with the prior art:

[0029] 1) The direct-drive power control system provided by this utility model has strong adaptability and can maintain working stability according to different power supply conditions on site.

[0030] 2) The direct drive power control system provided by this utility model can recover energy during the motor braking process.

[0031] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used in conjunction with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 A structural block diagram of a direct-drive power control system according to an embodiment of the present invention is shown;

[0034] Figure 2 This diagram shows a connection schematic of an AC / DC parallel control mode according to an embodiment of the present invention;

[0035] Figure 3This diagram shows a connection schematic of a series charging control mode according to an embodiment of the present invention;

[0036] Figure 4 A connection diagram of a pure battery control mode according to an embodiment of the present invention is shown;

[0037] Figure 5 A connection diagram of a low-pressure overdrive control mode according to an embodiment of the present invention is shown.

[0038] The meanings of the reference numerals in the attached figures are as follows: 100-Direct drive power control system; 1-High voltage AC power source; 2-Battery management control system; 3-AC / DC servo driver; 4-Control signal power supply; 51-Electric actuator; 52-Super control brake; 61-DC power battery pack; 62-Super control battery pack. Detailed Implementation

[0039] The following detailed description of the embodiments of this utility model, in conjunction with the accompanying drawings, will provide a thorough understanding of how this utility model uses technical means to solve technical problems and achieve technical effects, enabling its implementation. It should be noted that, provided there is no conflict, the various embodiments and features within them can be combined with each other, and all resulting technical solutions are within the protection scope of this utility model.

[0040] Furthermore, numerous specific details are set forth in the following description for purposes of explanation, in order to provide a thorough understanding of the embodiments of this utility model. However, it will be apparent to those skilled in the art that this utility model may be practiced without the specific details herein or the particular methods described.

[0041] This invention does not improve the control method. The devices of this invention use existing control methods, or each device itself can achieve this function.

[0042] The prior art (CN201910882111.2) provides a dual-source control system and its control method. Electric vehicles equipped with this dual-source control system convert the output voltage of the battery swapping pack to a voltage that satisfies the input voltage of the on-board battery pack, achieving voltage matching between the battery swapping pack and the on-board battery pack. Through this dual-source control system, the battery swapping pack distributes its stored electrical energy to the motor via the battery swapping high-voltage distribution cabinet and the on-board high-voltage distribution cabinet, while the on-board battery pack distributes its stored electrical energy to auxiliary electrical equipment via the on-board high-voltage distribution cabinet. This improves battery utilization and significantly extends the driving range of the electric vehicle.

[0043] The shortcomings of the aforementioned prior art are:

[0044] (1) The dual-source control system includes a vehicle controller, a battery swapping high-voltage distribution cabinet, an on-board high-voltage distribution cabinet and a DC-DC transformer system. The DC-DC transformer system is located between the battery swapping battery pack and the on-board battery pack. It belongs to the field of power battery technology for electric vehicles and has not been applied to the power management of oil and gas drilling, especially controlled pressure drilling.

[0045] (2) The dual-source control system is mainly used for the management and control between power battery packs, and cannot be used for power switching and management control between conventional industrial and civil AC power and battery packs.

[0046] In view of the shortcomings of the existing technology, the advantages of this utility model are: the direct drive power control system has strong adaptability and can switch between four working modes, namely ADPC (AC-DC parallel control), SCBC (series charging control), SPBC (pure battery control) and LVOC (low voltage overdrive control), according to different power supply conditions on site, so as to maintain working stability.

[0047] Figure 1 A structural block diagram of a direct-drive power control system according to an embodiment of the present invention is shown.

[0048] like Figure 1 As shown, the direct-drive power control system 100 includes: a battery management control system 2, an AC / DC servo driver 3, a control signal power supply 4, and a DC power battery pack 61.

[0049] In one embodiment, the battery management control system 2 adopts a dual-source multi-mode BMS (Battery Management System) control system, the control signal power supply 4 adopts a low-voltage control signal power supply, and the DC power battery pack 61 adopts a medium-voltage DC power battery pack.

[0050] It should be noted that other battery management control systems 2, control signal power supplies 4, and DC power battery packs 61 applicable to this utility model can also be applied to this utility model. This utility model does not limit the specific models and types of battery management control systems 2, control signal power supplies 4, and DC power battery packs 61.

[0051] Furthermore, high pressure, low pressure, and medium pressure are only used to indicate the relative relationship of pressure values. They can be voltage ranges known in the art, or they can be defined and adjusted according to actual conditions. This utility model does not limit the pressure values ​​of high pressure, low pressure, and medium pressure.

[0052] In one embodiment, when the direct-drive power control system 100 is in AC / DC parallel switching control mode (ADPC): the battery management control system 2 and the AC / DC servo driver 3 are connected in sequence. The battery management control system 2 and the AC / DC servo driver 3 are also connected to the control signal power supply 4 and the DC power battery pack 61, respectively.

[0053] In one embodiment, when the direct-drive power control system 100 is in Series Charging Battery Control (SCBC) mode: the battery management control system 2, the control signal power supply 4, and the AC / DC servo driver 3 are connected in sequence. The battery management control system 2 is also connected to the DC power battery pack 61. The DC power battery pack 61 is also connected to the AC / DC servo driver 3.

[0054] According to another aspect of the present invention, a pressure-controlled drilling system is also provided, which includes a direct-drive power control system 100.

[0055] In one embodiment, the controlled-pressure drilling system further includes: a high-voltage AC power source 1 and a controlled mechanism. The high-voltage AC power source 1 supplies power to the battery management control system 2; the controlled mechanism receives drive commands and / or other control commands from the AC / DC servo driver 3. Further, the controlled mechanism includes: an electric actuator 51 and / or a super-control brake 52.

[0056] Figure 2 A connection diagram of an AC / DC parallel control mode according to an embodiment of the present invention is shown.

[0057] When the on-site power and voltage meet the requirements of the drilling and production equipment, the direct drive power control system 100 is in AC / DC parallel control mode.

[0058] In one embodiment, on-site power refers to high-voltage AC power source 1, and drilling equipment refers to electrical equipment required for drilling.

[0059] It should be noted that this utility model does not limit the type or model of on-site power supply or drilling equipment.

[0060] like Figure 2 As shown, a high-voltage AC power source 1, a battery management and control system 2, an AC / DC servo driver 3, and an electric actuator 51 are connected in sequence. Specifically, the high-voltage AC power source 1 supplies power to the battery management and control system 2, the battery management and control system 2 provides AC power to the AC / DC servo driver 3, and the AC / DC servo driver 3 sends drive commands and / or other control commands to the electric actuator 51.

[0061] like Figure 2As shown, the battery management control system 2, the control signal power supply 4, the AC / DC servo driver 3, and the overclock brake 52 are connected in sequence. Specifically, the battery management control system 2 provides high-voltage AC power to the control signal power supply 4 through a high-voltage power supply circuit. The control signal power supply 4 then supplies low-voltage control power to the AC / DC servo driver 3, which controls the switching of the overclock brake 52.

[0062] like Figure 2 As shown, the battery management control system 2 is also connected to the DC power battery pack 61, which in turn is connected to the AC / DC servo drive 3. Specifically, the AC / DC servo drive 3 recovers the braking energy generated during the braking process of the electric actuator 51 to the DC power battery pack 61. The battery management control system 2 detects the voltage of the DC power battery pack 61. When the voltage of the DC power battery pack 61 is insufficient (lower than a preset value), the battery management control system 2 charges the DC power battery pack 61 until it is fully charged.

[0063] In one embodiment, after the automatic pressure controlled drilling equipment (drilling and production equipment) is installed on site, it is connected to a high-voltage AC power source 1. When the high-voltage AC power source 1 has sufficient power and the voltage is stable, the direct-drive power control system 100 operates in AC / DC parallel control mode (ADPC): the high-voltage AC power source 1 supplies power to the battery management control system 2, which in turn supplies AC power to the AC / DC servo drive 3. The AC / DC servo drive 3 drives the electric actuator 51. At the same time, the battery management control system 2 supplies high-voltage AC power to the control signal power supply 4, which in turn supplies low-voltage control power to the AC / DC servo drive 3. The AC / DC servo drive 3 controls the super control... When the AC / DC servo driver 3 drives the electric actuator 51, the overclock brake 52 is turned on. When the AC / DC servo driver 3 sends a stop signal, the overclock brake 52 is turned off, and the motor of the electric actuator 51 stops quickly in braking mode. At the same time, the AC / DC servo driver 3 recovers the braking energy generated by the electric actuator 51 during braking to the DC power battery pack 61. The battery management control system 2 detects the voltage of the DC power battery pack 61. When the voltage of the DC power battery pack 61 is insufficient (the voltage is lower than the preset value), the battery management control system 2 charges the DC power battery pack 61 until the DC power battery pack 61 is fully charged.

[0064] Figure 3 A connection diagram of a series charging control mode according to an embodiment of the present invention is shown.

[0065] When the on-site power or voltage does not meet the requirements of the drilling and production equipment, the direct drive power control system 100 is in series charging control mode (SCBC).

[0066] like Figure 3 As shown, the high-voltage AC power source 1, the battery management and control system 2, the DC power battery pack 61, the AC / DC servo driver 3, and the electric actuator 51 are connected in sequence. Specifically, the high-voltage AC power source 1 supplies power to the battery management and control system 2. When the battery management and control system 2 detects insufficient power supply voltage (voltage lower than a preset value), it charges the DC power battery pack 61. The DC power battery pack 61 supplies power to the AC / DC servo driver 3, which drives the electric actuator 51 to operate.

[0067] like Figure 3 As shown, the battery management control system 2 is also connected in sequence to the control signal power supply 4, the AC / DC servo driver 3, and the overclock brake 52. Specifically, the battery management control system 2 supplies medium-voltage AC power to the control signal power supply 4, and the control signal power supply 4 supplies low-voltage control power to the AC / DC servo driver 3, which controls the switching of the overclock brake 52.

[0068] In one embodiment, when power is insufficient or voltage is low, the direct-drive power control system 100 operates in SCBC mode: the high-voltage AC power source 1 supplies power to the battery management control system 2; after detecting insufficient voltage, the battery management control system 2 charges the DC power battery pack 61; the DC power battery pack 61 supplies power to the AC / DC servo driver 3; the AC / DC servo driver 3 drives the electric actuator 51 to run; at the same time, the battery management control system 2 supplies medium-voltage AC power to the control signal power supply 4; the control signal power supply 4 transmits low-voltage control power to the AC / DC servo driver 3; the AC / DC servo driver 3 controls the switching of the overdrive brake 52; when the AC / DC servo driver 3 drives the electric actuator 51 to run, the overdrive brake 52 is turned on; when the AC / DC servo driver 3 issues a stop signal, the overdrive brake 52 is turned off; the motor of the electric actuator 51 stops rapidly in braking state; at the same time, the AC / DC servo driver 3 recovers the braking energy generated by the electric actuator 51 during braking to the DC power battery pack 61.

[0069] Figure 4 A connection diagram of a pure battery control mode according to an embodiment of the present invention is shown.

[0070] The direct-drive power control system 100 also features a pure battery control mode (SPBC, Single Power Battery Control), in which the direct-drive power control system 100 enters pure battery control mode when there is a power failure on site.

[0071] like Figure 4As shown, the DC power battery pack 61 and the AC / DC servo driver 3 are connected in sequence. The AC / DC servo driver 3 is also connected to the battery management control system 2. The battery management control system 2 is also connected to the DC power battery pack 61. Specifically, the battery management control system 2, the DC power battery pack 61, the AC / DC servo driver 3, and the electric actuator 51 are connected in sequence. The AC / DC servo driver 3 is also connected to the overdrive brake 52.

[0072] In one embodiment, when there is a power failure on site, the control system operates in SPBC mode: the battery management control system 2 controls the DC power battery pack 61 to supply DC power to the AC / DC servo drive 3, and the AC / DC servo drive 3 supplies DC power to the battery management control system 2. When the AC / DC servo drive 3 drives the electric actuator 51, the overclock brake 52 is opened. When the AC / DC servo drive 3 issues a stop signal, the overclock brake 52 is closed, and the motor of the electric actuator 51 stops quickly in braking state. At the same time, the AC / DC servo drive 3 recovers the braking energy generated by the electric actuator 51 during braking to the DC power battery pack 61.

[0073] Figure 5 A connection diagram of a low-pressure overdrive control mode according to an embodiment of the present invention is shown.

[0074] The direct drive power control system 100 also features a low voltage DCoverride control mode (LVOC). In the low voltage DCoverride control mode, the direct drive power control system 100 also includes an override battery pack 62.

[0075] It should be noted that the override brake 52 and override battery pack 62 refer to brakes and battery packs controlled by an "override" method, which differs from conventional control methods. In application, those skilled in the art can select appropriate methods based on actual conditions. This invention does not limit the specific override measures, or the specific models and types of the override brake 52 and override battery pack 62.

[0076] like Figure 5 As shown, the supercontrol battery pack 62 and the AC / DC servo driver 3 are connected in sequence. The AC / DC servo driver 3 is also connected to the battery management control system 2; the AC / DC servo driver 3 is also connected to the supercontrol brake 52; the battery management control system 2 is also connected to the control signal power supply 4 and the supercontrol battery pack 62. The control signal power supply 4 is also connected to the AC / DC servo driver 3.

[0077] In one embodiment, when there is a power failure on site and the DC power battery pack 61 is low in power, the direct drive power control system 100 operates in LVOC mode: the super control battery pack 62 supplies low-voltage DC power to the AC / DC servo driver 3, the AC / DC servo driver 3 supplies DC power to the battery management control system 2, the battery management control system 2 supplies medium-voltage power to the control signal power supply 4, the control signal power supply 4 supplies low-voltage control power to the AC / DC servo driver 3, the AC / DC servo driver 3 controls the super control brake 52 to open, and emergency operation is performed manually.

[0078] In one embodiment, the direct-drive power control system 100 has four operating modes: ADPC (AC-DC parallel control) mode, SCBC (Series charging control) mode, SPBC (Pure battery control) mode, and LVOC (Low-voltage overdrive control) mode. The corresponding operating mode is switched according to the on-site power supply conditions.

[0079] In summary, this utility model provides a dual-source multi-mode direct-drive power control system and a pressure-controlled drilling system, which have the following advantages compared with the prior art:

[0080] 1) The direct-drive power control system provided by this utility model has strong adaptability and can maintain working stability according to different power supply conditions on site.

[0081] 2) The direct drive power control system provided by this utility model can recover energy during the motor braking process.

[0082] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0083] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0084] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0085] Certain terms are used throughout this application to refer to specific system components. As those skilled in the art will recognize, the same components may often be referred to by different names, and therefore this application is not intended to distinguish those components that differ only in name and not in function. In this application, the terms “comprise,” “include,” and “have” are used in an open-ended manner and should therefore be interpreted as meaning “including, but not limited to…”. Furthermore, the terms “substantially,” “materially,” or “approximately” as used herein refer to industry-accepted tolerances for the corresponding terms. The term “coupling,” as may be used herein, includes direct coupling and indirect coupling via additional components, elements, circuits, or modules, wherein, for indirect coupling, the intermediate component, element, circuit, or module does not alter the information of the signal but may adjust its current level, voltage level, and / or power level. Inferred coupling (e.g., one element is inferredly coupled to another element) includes direct and indirect coupling between two elements in the same manner as “coupling.”

[0086] The phrase "an embodiment" or "an embodiment" used in this specification means that a specific feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0087] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

[0088] Although the embodiments disclosed in this utility model are as described above, the content described is merely for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this utility model, but the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. A dual-source multi-mode direct-drive power supply control system, characterized in that, The direct drive power control system includes: a battery management control system (2), an AC / DC servo driver (3), a control signal power supply (4), and a DC power battery pack (61). When the direct drive power control system is in AC / DC parallel control mode: the battery management control system (2) and the AC / DC servo driver (3) are connected in sequence; the battery management control system (2) and the AC / DC servo driver (3) are also connected to the control signal power supply (4) and the DC power battery pack (61) respectively. When the direct drive power control system is in series charging control mode: the battery management control system (2), the control signal power supply (4), and the AC / DC servo driver (3) are connected in sequence; the battery management control system (2) is also connected to the DC power battery pack (61); the DC power battery pack (61) is also connected to the AC / DC servo driver (3).

2. The dual-source multi-mode direct-drive power supply control system as described in claim 1, characterized in that, The direct-drive power control system also features a pure battery control mode, in which: The DC power battery pack (61) and the AC / DC servo driver (3) are connected in sequence; The AC / DC servo driver (3) is also connected to the battery management control system (2); The battery management and control system (2) is also connected to the DC power battery pack (61).

3. The dual-source multi-mode direct-drive power supply control system as described in claim 1, characterized in that, The direct-drive power control system also has a low-voltage overdrive control mode; in the low-voltage overdrive control mode, the direct-drive power control system also includes an overdrive battery pack (62).

4. The dual-source multi-mode direct-drive power supply control system as described in claim 3, characterized in that, When the direct-drive power control system is in the low-voltage overdrive control mode: The super-control battery pack (62) and the AC / DC servo driver (3) are connected in sequence; The AC / DC servo driver (3) is also connected to the battery management control system (2); The battery management and control system (2) is also connected to the control signal power supply (4) and the super control battery pack (62); The control signal power supply (4) is also connected to the AC / DC servo driver (3).

5. A pressure-controlled drilling system, characterized in that, The controlled pressure drilling system includes a direct-drive power control system as described in any one of claims 1-4.

6. A pressure-controlled drilling system as described in claim 5, characterized in that, The pressure-controlled drilling system also includes: A high-voltage AC power source (1) is used to supply power to the battery management and control system (2); The controlled mechanism is used to receive drive commands from the AC / DC servo driver (3).

Images