Electric transmission system and electric workover rig

Abstract

The utility model relates to the technical field of electric workover rigs, in particular to a telex system and an electric workover rig, which comprise a base, a power supply module, a first power transmission module and a control module, the first power transmission module is electrically connected with the power supply module, and the first power transmission module comprises a walking module and a winch module which are connected in parallel; the power supply module can supply power to the walking module and / or the winch module, and the control module can control on-off of a circuit between the power supply module and the walking module and / or the winch module; according to the workover rig, the walking module and the winch module in the workover rig are combined together, so that the overall structure is simpler, the cost is lower, and the workover rig is easier to carry.

Description

Technical Field

[0001] This utility model relates to the field of electric well workover rig technology, specifically to an electric transmission system and an electric well workover rig. Background Technology

[0002] Existing electric workover rigs simply replace the winch of a conventional workover rig with an electric winch. The electrical transmission system uses a centralized control mode and is equipped with an independent VFD control room. The AC power generated by the generator set is rectified after being connected to the grid or connected to the grid, and then sent to the DC bus via VFD to the hoisting system, rotating system, circulation system and other modules. The electrical transmission system is a large and heavy independent module. Electric workover rigs cannot be used normally without the power module and the electrical control module. Existing electric workover rigs must be equipped with three modules at the same time to work properly. Each time they work, the cables and cable racks between the modules need to be disassembled and reassembled. There are many modules to transport, and the disassembly and assembly workload is large. Since workover operations are a job that frequently changes the work site, the workover rig needs to be moved frequently. This is one of the main reasons why electric workover rigs cannot be widely promoted and applied.

[0003] Existing electric workover rigs use power batteries or range-extended chassis vehicles. The winch is powered by an independent generator set or the power grid. The chassis travel and winch operation are two separate transmission and control systems. The winch control system adopts the design mode of electric drilling rigs, which requires an electrical control cabinet to be installed on the chassis. Conventional electric drilling rig winch control modes are usually characterized by air-cooled VFD, large size and heavy weight. At the same time, the existing electric workover rigs are much more expensive than mechanical workover rigs due to the addition of an independent electrical transmission system.

[0004] Application No. 201910367972.7 discloses a direct-drive electric workover rig, which includes a transmission mode that uses an AC variable frequency disc motor to directly drive the drum body. The transmission is simple and the structure is compact. The winch braking system adopts an energy-consuming braking method that combines a braking unit and a braking resistor to achieve four-quadrant operation of the motor and zero-speed load-bearing hovering function. The motor can operate stably at low speeds. The energy-consuming braking of the winch drive motor variable frequency system serves as the main brake of the winch. The auxiliary brake of the winch adopts a pneumatically controlled disc brake to extend the service life of the brake pads and reduce maintenance workload. It discloses a method of simplifying the structure of the workover rig by using a direct-drive module, but does not simplify the workover rig control module. Utility Model Content

[0005] The technical problem this invention aims to solve is that the separate operation of the travel control module and the operation control module of the workover rig results in a complex overall structure and high equipment cost.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] First, an electric transmission system is provided, including a power supply module, a first power transmission module, and a control module. The first power transmission module is electrically connected to the power supply module. The first power transmission module includes a traveling module and a winch module connected in parallel. The power supply module is capable of supplying power to the traveling module and / or the winch module. The control module is capable of controlling the on / off state of the circuit between the power supply module and the traveling module and / or the winch module.

[0008] Furthermore, the power supply module includes a storage battery, and the control module includes a controller and a first switch. The first switch is disposed between the storage battery and the parallel circuit of the walking module and the winch module, and the controller is capable of controlling the opening and closing of the first switch.

[0009] Furthermore, the power supply module also includes a generator, which is electrically connected to the battery;

[0010] The control module also includes a second switch, which is disposed between the generator and the battery, and the control module can control the opening and closing of the second switch.

[0011] Furthermore, the first power transmission module includes an inverter, and the control module includes a third switch and a fourth switch;

[0012] The third switch is located between the inverter and the walking module, and the fourth switch is located between the inverter and the winch module. The control module can control the opening and closing of the third and fourth switches.

[0013] Furthermore, the control module includes a sixth switch, which is disposed between the inverter and the power supply module, and the control module is capable of controlling the opening and closing of the sixth switch.

[0014] Furthermore, it also includes a second power transmission module, wherein the first power transmission module and the second power transmission module are connected in parallel, and the second power transmission module includes a fifth switch, and the control module is capable of controlling the opening and closing of the fifth switch.

[0015] Furthermore, a rectifier is connected to the external end of the power supply module, and the control module includes a seventh switch, which is located in the parallel circuit between the rectifier and the first power transmission module and the second power transmission module.

[0016] Furthermore, the walking module includes a walking motor, and the winch module includes a winch motor.

[0017] An electric workover rig includes a chassis and the aforementioned electrical transmission system. The walking module, the winch module, and the control module are all mounted on the chassis, and the walking module and the winch module share the control module.

[0018] Furthermore, it also includes an energy management system.

[0019] The present invention has the following beneficial effects: by combining the walking module and the winch module, the present invention makes the overall structure simpler, the cost lower, and the transportation process easier. At the same time, the conversion between the various modules during use is also easier, making the operation simpler, reducing the difficulty of operation, and improving work efficiency.

[0020] This utility model of an electric workover rig also possesses the aforementioned advantages. Furthermore, compared to existing electric workover rigs, it eliminates the winch control module, freeing up the space and weight of the winch control cabinet for the workover rig's lifting system. This reduces the overall transport weight of the workover rig, increases the space available for equipment layout on the workover rig platform, and lowers equipment costs. The electric workover rig's travel and winch lifting controls share a common control system, eliminating one control system compared to conventional electric workover rigs and further reducing equipment costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a connection diagram for this embodiment.

[0023] Figure 2 This is a schematic diagram of an electric well-workover system.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1: Generator, 2: Rectifier, 3: Battery, 4: Inverter, 5: Travel motor, 6: Winch motor, 71: First switch, 72: Second switch, 73: Third switch, 74: Fourth switch, 75: Fifth switch, 76: Sixth switch, 77: Seventh switch, 8: Chassis, 81: Travel module, 82: Winch module, 83: Control module. Detailed Implementation

[0026] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] It should be noted that all directional indicators in this embodiment are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] This disclosure provides an electrical transmission system for an electric workover rig. For example... Figure 1 As shown, it includes a power supply module, a first power transmission module, a second power transmission module, and a control module 83. The first power transmission module is electrically connected to the power supply module, and the first power transmission module and the second power transmission module are connected in parallel. The first power transmission module includes a walking module 81 and a winch module 82 connected in parallel. The power supply module can supply power to the walking module 81 and / or the winch module 82, and the control module 83 can control the on / off of the circuit between the power supply module and the walking module 81 and / or the winch module 82.

[0031] In other words, the control module 83 can control the circuit connection between the power supply module and the traveling module 81, and the circuit disconnection between the power supply module and the winch module 82, so that the power supply module can supply power to the traveling module 81 but not to the winch module 82; or, the control module 83 can control the circuit disconnection between the power supply module and the traveling module 81, and the circuit connection between the power supply module and the winch module 82, so that the power supply module can supply power to the winch module 82 but not to the traveling module 81; or, the control module 83 can control the connection of the circuits between the power supply module and the traveling module 81 and the winch module 82 respectively, so that the power supply module can supply power to both the winch module 82 and the traveling module 81 simultaneously; or, the control module 83 can control the disconnection of the circuits between the power supply module and the traveling module 81 and the winch module 82 respectively, so that the power supply module does not supply power to either the winch module 81 or the traveling module 82.

[0032] In addition, the walking module 81 and the winch module 82 are conventional equipment of electric workover rigs in related technologies, and the second power transmission module includes other equipment on the electric workover rig that requires power transmission, which will not be described in detail here.

[0033] In some embodiments, the power supply module includes a battery 3, the travel module 81 includes a travel motor 5, and the winch module 82 includes a winch motor 6. The battery 3 can supply power to the travel motor 5 and / or the winch motor 6. The travel motor 5 is used to provide power to move the equipment to a designated position, and the winch motor 6 is used to control the operation of the winch and provide power to the winch.

[0034] In this embodiment, during use, the equipment first needs to be moved to the work position. At this time, the control module connects the battery 3 and the walking motor 5. The walking motor 5 provides power to move the equipment. When the equipment is in place, the control module 83 disconnects the battery 3 from the walking motor 5 and connects the winch motor 6 to the battery 3. At this time, the winch works. When the winch finishes its work, the winch motor 6 and the battery 3 are disconnected, and the walking motor 5 and the battery 3 are connected to move the equipment away.

[0035] Because the equipment's movement and winch share a single operating module, the overall structure of the equipment is simpler, reducing equipment costs and making it easier to move and use.

[0036] In addition, a range-extending mode can be added to this embodiment. The power supply module also includes a generator 1, which can be electrically connected to the battery 3. The control module can connect the generator 1 and the battery 2. Furthermore, there can be multiple power supply modes for the first and second power transmission modules, which are not limited in this disclosure. For example, the generator 1 can supply power only to the battery 3, so that the battery 3 supplies power to the first and second power transmission modules; or, the generator 1 can supply power to the battery 3 while also directly supplying power to the first and second power transmission modules.

[0037] In this embodiment, the generator 1 is a diesel generator, and a rectifier 2 is connected between the diesel generator 1 and the battery 3 to ensure that the electricity generated by the diesel generator can supply the battery 3.

[0038] An inverter 4 is installed between the first power transmission module and the storage battery 3.

[0039] The control module includes the PLC system and the control switches between the various modules.

[0040] Specifically, the control module, including the PLC system, enables the control switches to be turned on or off, thereby achieving the connection and disconnection between various components.

[0041] Specifically, in this embodiment:

[0042] A first switch 71 is provided between the battery 3 and the parallel circuit of the walking module 81 and the winch module 82;

[0043] A second switch 72 is installed between the generator 1 and the battery 3;

[0044] A third switch 73 is provided between the inverter 4 and the walking module 81;

[0045] A fourth switch 74 is provided between the inverter 4 and the winch module 82;

[0046] The second power transmission module is equipped with a fifth switch 75;

[0047] A sixth switch 76 is installed between inverter 4 and the power supply module.

[0048] A seventh switch 77 is provided at the parallel circuit of rectifier 2 with the first power transmission module and the second power transmission module.

[0049] This disclosure also provides an electric well workover machine, such as Figure 2As shown, the system includes a chassis 8 and the aforementioned electrical transmission system. The walking module 81, winch module 82, and control module 83 are all mounted on the chassis 8, and the walking module 81 and winch module 82 share the control module 83. In some embodiments, the control module can be a control cabinet mounted on the chassis 8. With this configuration, only one set of control module 83 is required to simultaneously meet the control requirements of the walking module 81 and the winch module 82. Compared to the related technologies where the walking module 81 and the winch module 82 are each equipped with an independent control cabinet, this eliminates the need for a winch control cabinet, reducing the cost of the equipment and the overall transport weight of the electric well workover rig. In addition, it can increase the equipment layout space on the chassis 8. For example, a rope rewinding machine can be added to the chassis 8.

[0050] In addition, the electric workover rig is equipped with an energy management system, which allows generator 1 to operate in the high-efficiency range, reducing energy consumption. It can also use a portion of the electricity pre-charged by the grid, greatly reducing operating costs.

[0051] When moving, switch to the travel mode in the cab. At this time, the PLC system connects the battery 3, inverter 4 and travel motor 5. DC power is output to the travel motor 5 after passing through inverter 4, so as to realize the movement of the well repair machine.

[0052] When working on the well, the switch in the cab is switched to the winch position. The PLC system connects the battery 3, inverter 4 and winch motor 6. DC power is output to the winch motor 6 after passing through inverter 4, so that the winch can work.

[0053] It should be understood that the above description of the specific embodiments of this utility model is only for illustrating the technical route and features of this utility model, and its purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. However, this utility model is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of this utility model should be covered by the protection scope of this utility model.

Claims

1. A telemetry system, characterized in that, It includes a power supply module, a first power transmission module and a control module (83). The first power transmission module is electrically connected to the power supply module. The first power transmission module includes a walking module (81) and a winch module (82) connected in parallel. The power supply module can supply power to the walking module (81) and / or the winch module (82). The control module (83) can control the on / off of the circuit between the power supply module and the walking module (81) and / or the winch module (82). The first power transmission module includes an inverter (4); The control module includes a sixth switch (76), which is located between the inverter (4) and the power supply module. The control module can control the opening and closing of the sixth switch (76).

2. The telemetry system according to claim 1, characterized in that, The power supply module includes a storage battery (3), and the control module includes a controller and a first switch (71). The first switch (71) is located between the storage battery and the parallel circuit of the walking module and the winch module. The controller can control the opening and closing of the first switch (71).

3. The telemetry system according to claim 2, characterized in that, The power supply module also includes a generator (1), which is electrically connected to the battery (3); The control module also includes a second switch (72), which is located between the generator (1) and the battery (3). The control module can control the opening and closing of the second switch (72).

4. The telemetry system according to claim 1, characterized in that, The control module includes a third switch (73) and a fourth switch (74). The third switch (73) is located between the inverter (4) and the walking module, and the fourth switch (74) is located between the inverter (4) and the winch module. The control module can control the opening and closing of the third switch (73) and the fourth switch (74).

5. A telemetry system according to claim 1, characterized in that, It also includes a second power transmission module, the first power transmission module and the second power transmission module are connected in parallel, the second power transmission module includes a fifth switch (75), and the control module can control the opening and closing of the fifth switch (75).

6. A telemetry system according to claim 5, characterized in that, The power supply module is connected to a rectifier (2) at its external end. The control module includes a seventh switch (77), which is located in the parallel circuit of the rectifier (2) and the first and second power transmission modules.

7. A telemetry system according to claim 1, characterized in that, The walking module includes a walking motor (5), and the winch module includes a winch motor (6).

8. An electric well-servicing machine, characterized in that, The system includes a chassis (8) and an electric transmission system as described in any one of claims 1-7, wherein the walking module (81), the winch module (82) and the control module (83) are all mounted on the chassis (8), and the walking module (81) and the winch module (82) share the control module.

9. An electric well-servicing machine according to claim 8, characterized in that, It also includes an energy management system.

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