Automatic shore power energy storage ocean workover rig

Abstract

The utility model relates to the technical field of offshore oil drilling and repairing equipment, and provides an automatic shore power energy storage ocean workover rig which comprises a shore power grid power supply end, a plurality of drilling and repairing equipment and an electric control energy storage system which are all connected to a busbar in parallel. The electric control energy storage system comprises a rectification module, a power conversion module, an energy storage module and an inversion module. The rectification module is arranged between a shore power grid power supply end and a busbar, the power conversion module is arranged between the energy storage module and the busbar, and the inversion module is arranged between a plurality of drilling and workover devices and the busbar; according to the utility model, shore power and energy storage dual-path power supply is adopted, and no-load energy of a high-power motor is recovered, so that the power supply stability of large-scale electric equipment can be ensured, energy waste is reduced, and the effects of reducing cost and increasing efficiency are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of offshore oil drilling and repairing equipment, and provides an automatic shore power energy storage offshore workover rig. BACKGROUND

[0002] An offshore workover rig is a special equipment used for maintenance and repair of offshore oil and gas fields. Its main functions include lifting and lowering oil pipes and drill pipes in oil wells, daily maintenance, troubleshooting, repair, yield improvement measures, and final disposal of offshore oil and gas wells. The basic components include the following parts:

[0003] 1. Hull: As the platform of the entire workover rig, it needs to have good stability and enough space to install various equipment.

[0004] 2. Workover device: including workover tower, workover crane, workover power head, etc., used for wellhead operation.

[0005] 3. Power system: provides power for workover operations, usually including diesel generators, hydraulic systems, etc.

[0006] 4. Control system: used to accurately control each link of the workover operation, ensuring operation safety and efficiency.

[0007] 5. Auxiliary equipment: including various tools, lifting devices, safety equipment, etc., used to support the smooth progress of the workover operation.

[0008] 6. Communication and navigation system: ensures the positioning, navigation and communication of the workover rig during offshore operation.

[0009] 7. Living facilities: provide necessary living space and facilities for crew members, including accommodation, catering, entertainment, etc.

[0010] The design and construction of the offshore workover rig need to meet specific safety and performance standards to adapt to harsh marine environments and complex operating conditions.

[0011] Most offshore workover rigs are diesel-powered workover rigs. Diesel engines as the power of offshore workover rigs have some disadvantages, including emission problems, large noise and vibration, high maintenance costs, and potential environmental impact, such as: 1. The emissions of diesel engines contain a large amount of nitrogen oxides and particulate matter, which can negatively affect air quality; 2. The noise and vibration generated during diesel engine operation can affect the comfort and health of workers; 3. Diesel engines need regular maintenance and repair, increasing operating costs; 4. As emission requirements continue to improve, a large number of diesel engines are forced to be scrapped or lack maintenance parts, making many workover rigs unable to operate; 5. The use of diesel engines can also pollute the marine environment, especially in the event of a leak or improper discharge; 6. The efficiency of diesel engines is about 50%, and the working efficiency of the coupled coupler is about 80%, the overall working efficiency is low.

[0012] With the vigorous advocacy of energy saving and environmental protection, various forms of energy storage automatic electric workover rigs have appeared in oilfields, and offshore workover rigs are rapidly developing in terms of electric drive and automation. At present, domestic electric workover rigs powered by shore power grid are emerging.

[0013] With the emergence and application of equipment such as two-layer platform manipulators, drilling platform manipulators, automatic hydraulic tongs, pipe rod conveyors, automatic elevator hooks, automatic slips, and data acquisition and monitoring systems applied to oil drilling and workover rigs, it is increasingly necessary to integrate and apply them to offshore workover rigs. However, existing offshore workover rigs still have limitations in terms of automation and energy storage, such as high energy consumption, power waste, low automation level of workover operations, and insufficient safety of equipment use, which cannot fully meet the needs of modern offshore oil drilling and workover operations. SUMMARY

[0014] The utility model aims at the shortage of prior art, proposes an automatic shore power energy storage offshore workover rig, solves the following technical problems: overcomes the low environmental protection and poor energy efficiency of diesel-powered offshore workover rigs; realizes the integration and linkage control of various intelligent and automatic equipment on offshore workover rigs.

[0015] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: an automatic shore power energy storage offshore workover rig is provided with a shore power grid power supply end, a plurality of drilling and workover equipment and an electric control energy storage system, the shore power grid power supply end, the plurality of drilling and workover equipment and the electric control energy storage system are all connected in parallel to a busbar;The electric control energy storage system includes a rectifier module, a power conversion module, an energy storage module and an inverter module;The rectifier module is arranged between the shore power grid power supply end and the busbar, the power conversion module is arranged between the energy storage module and the busbar, and the inverter module is arranged between the plurality of drilling and workover equipment and the busbar.

[0016] Further, the power conversion module is a storage bidirectional DC / DC power converter.

[0017] Further, the several drilling and workover equipment are all AC motor driven.

[0018] Further, the storage module is a battery pack; and the busbar is a DC busbar.

[0019] Further, the inverter module comprises an inverter unit connected with the several drilling and workover equipment one by one; the inverter unit is a bidirectional inverter provided with an input positive pole, an input negative pole and an AC input / output end.

[0020] Further, the positive pole and the negative pole of the battery pack are connected with the input positive pole and the input negative pole of the storage bidirectional DC / DC power converter respectively; the output positive pole of the storage bidirectional DC / DC power converter is connected with the DC busbar; and the output negative pole of the storage bidirectional DC / DC power converter is connected with the input negative pole of the bidirectional inverter.

[0021] Further, the rectifier module comprises two sets of parallel rectifier units; and an interlocking circuit is arranged between the two sets of parallel rectifier units.

[0022] Further, the battery pack is one or a combination of a lead-acid battery and a lithium ion battery pack.

[0023] Further, a brake unit and a brake resistor are further included; and the brake resistor is connected to the busbar through the brake unit.

[0024] Further, the several drilling and workover equipment comprise a drawworks, a rotary table and several mud pumps.

[0025] The automatic shore power storage offshore workover machine has the following beneficial effects: the storage unit comprising the bidirectional DC / DC converter and the battery storage module is arranged in the automatic shore power storage offshore workover machine, so that in the storage scheme, the power source is optimized into a double-power mode of the shore power and the battery storage module, the battery system discharges to the DC busbar in the case of sudden load increase of the drive equipment end such as the drawworks, the on-site operation condition is met, the grid voltage fluctuation is avoided, the system can utilize the potential energy of the lowered pipe column to drive the drive motor of the drive equipment end to generate electricity and charge the battery storage module in the lowering process of the drive equipment end such as the drawworks, thereby realizing a working mode of "charging and discharging at the same time", the gravity potential energy in the lowering of the pipe column can be recovered and stored in the battery storage module, the electric energy is saved, the operation cost is reduced, the shore power grid is supplemented as the power supply of the motor when the drive motor of the drive equipment end is under heavy load, the fluctuation of the grid in the heavy load operation is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1The framework structural diagram of the electric control energy storage system of the utility model;

[0027] Figure 2 The framework structural diagram of the data acquisition remote transmission system of the utility model. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0029] Embodiment one

[0030] As Figure 1 shown, the automatic shore power energy storage ocean workover rig of the utility model is provided with an electric control energy storage system, and the electric control energy storage system mainly consists of an air circuit breaker, a rectifier unit, a braking unit, an inverter unit and an energy storage unit.

[0031] The shore power grid power supply end is connected to the rectifier unit through the air circuit breaker, the rectifier unit is connected to the DC bus, and the braking resistor is connected to the DC bus through the braking unit.

[0032] The energy storage unit mainly consists of a bidirectional DC / DC converter and a battery energy storage module, the input end of the air circuit breaker is connected to the shore power grid, the output end is connected to the rectifier unit through a cable, the rectifier unit is connected to the DC bus through a cable, the DC bus is connected to the bidirectional DC / DC converter, the inverter unit and the braking unit respectively, the battery energy storage module is connected to the DC bus through the bidirectional DC / DC converter, the inverter unit is connected to all the drive motors one by one through a cable, and the braking unit is connected to the braking resistor through a cable.

[0033] The marine workover rig is provided with a drive equipment end, and the drive equipment end is provided with a drive motor.

[0034] The marine workover rig mainly consists of an upper movable seat, a lower movable seat, a derrick assembly, a winch assembly, a rotary table transmission system, a high-pressure manifold, a workover pump, automatic equipment, a mud purification system, a sliding system and the like, and the electric control energy storage system and the data information acquisition and processing system.

[0035] The battery energy storage module uses lithium iron phosphate batteries. By setting up an energy storage unit including a bidirectional DC / DC converter and the battery energy storage module, the power source in the energy storage scheme is optimized into a dual-power mode of shore power and battery energy storage module. When the load on the drive equipment end, such as the winch, suddenly increases, the battery system discharges to the DC bus to meet the on-site working conditions and avoid grid voltage fluctuations. During the lowering process of the drive equipment end, such as the winch, the system can also use the potential energy of the lowering column to drive the drive motor on the drive equipment end to generate electricity and charge the battery energy storage module. This realizes a "charge and discharge" working mode for the entire system. It can recover the gravitational potential energy during the lowering of the column and store it in the battery energy storage module. At the same time, when the drive motor on the drive equipment end is under heavy load, it can supplement the shore power grid to provide power to the motor, reduce grid fluctuations during heavy load operations, realize energy recovery and utilization, save energy and reduce emissions, and reduce operating costs.

[0036] In this embodiment, the inverter unit is a bidirectional inverter. The main function of the bidirectional inverter is to realize bidirectional conversion between direct current (DC) and alternating current (AC). It can convert DC to AC and vice versa. In this system, the bidirectional inverter can flexibly perform charging and discharging operations according to the actual situation of the power grid and the power demand, thereby improving the flexibility and efficiency of the energy storage system.

[0037] In this embodiment, the bidirectional DC / DC converter is an energy storage bidirectional DC / DC power converter. By controlling the switching devices, it realizes the rise and fall of DC voltage and the regulation of current. Compared with the traditional unidirectional DC / DC converter, the energy storage bidirectional DC / DC power converter adds the function of reverse energy transfer, thereby enabling the charging and discharging management of energy storage devices.

[0038] The role of the bidirectional DC / DC power converter in this system is to enable bidirectional energy flow, that is, to facilitate effective energy exchange between energy storage devices and the grid, between energy storage devices themselves, or between energy storage devices and the load. It can also maintain stable performance output under various complex operating conditions, such as voltage fluctuations and current surges.

[0039] Example 2

[0040] like Figure 1 As shown, the rectifier unit includes rectifier unit A and rectifier unit B. Rectifier unit A and rectifier unit B are interlocked, and one of them is set as a standby rectifier unit, so that the relay protection of the switching circuit breaker does not require special configuration, and the power supply is safe, reliable and easy to operate.

[0041] Example 3

[0042] like Figure 1As shown, the drive equipment end includes winch, rotary table, mud pump, the drive motor includes winch drive motor, rotary table drive motor, mud pump drive motor, through the corresponding inverter unit drive winch drive motor, rotary table drive motor, mud pump drive motor, to realize the torque control of winch, rotary table, mud pump speed regulation.

[0043] The inverter unit adopts one-to-one control mode to drive winch drive motor, rotary table drive motor, mud pump drive motor A and mud pump drive motor B, respectively, to realize the torque control of winch, rotary table, mud pump main motor speed regulation. A special harmonic control cabinet is configured to eliminate the harmonic of the frequency conversion system. The entire automatic shore power energy storage offshore workover rig can use PLC control system to centrally control the electric control energy storage system. The PLC control system adopts a double CPU redundant system to realize logic protection, system early warning, fault detection and alarm display of the entire electric control energy storage system through field bus.

[0044] Embodiment four

[0045] As shown in Figures 1-2 It also includes a data acquisition and remote transmission system, which includes a land terminal, a data acquisition module and a data processing module. The data acquisition module includes data sensors respectively arranged on the drilling parameter instrument, winch, rotary table, mud pump and the electric control energy storage system, for acquiring corresponding data and sending them to the data processing module. The data processing module is used to send the received data information to the land terminal for display.

[0046] The data acquisition and remote transmission system can collect real-time running information of the automatic shore power energy storage drive system, drilling parameter instrument and other equipment, process the information and set a remote transmission function, so as to transmit the collected information to the set central control room of offshore platform or receiving terminal on land through wired or wireless transmission, thereby improving the informatization degree of the workover rig and the safety of operation.

[0047] Embodiment five

[0048] As shown in Figure 2 The data acquisition and remote transmission system further includes an alarm module, which is in communication connection with the data processing module and the land terminal. The data processing module is further used to compare whether the received data exceeds the preset alarm parameter. If it exceeds, the alarm module sends a warning signal to the alarm module, and the alarm module receives the warning signal and sends an alarm to the land terminal.

[0049] The alarm parameter is preset in the data processing module to realize the detection of data abnormality alarm. The running condition of the offshore workover rig during operation can be monitored in real time and automatically alarmed, and the informatization degree and operation safety are improved.

[0050] Embodiment six

[0051] The pipe column automatic processing system is also configured, and the pipe column automatic processing system comprises a second-floor mechanical arm, a drilling floor mechanical arm, an automatic hydraulic tong, a lifting ring deviation device, and a hydraulic lifting clamp. The hydraulic lifting clamp is used for lifting the pipe column. The drilling floor mechanical arm is used for supporting the pipe column lifted by the hydraulic lifting clamp on the drilling floor. The second-floor mechanical arm is used for grabbing the pipe column lifted by the hydraulic lifting clamp and placing the pipe column in the second floor. The lifting ring deviation device is used for clamping the pipe column pushed by the second-floor mechanical arm. The automatic hydraulic tong is used for extending to the well mouth to perform the make-up and break-out operation of the pipe column. The hydraulic drive mechanisms of the second-floor mechanical arm, the drilling floor mechanical arm, the automatic hydraulic tong, the lifting ring deviation device, and the hydraulic lifting clamp are respectively connected with the inverter unit through cables.

[0052] The hydraulic lifting clamp has a plurality of working positions. The second-floor mechanical arm is arranged at the bottom of the derrick second floor of the offshore workover rig. The second-floor mechanical arm can grab the pipe column lifted by the hydraulic lifting clamp and place the pipe column in the second floor. Meanwhile, the second-floor mechanical arm can also grab the pipe column placed in the second floor and move the pipe column to the well mouth. In cooperation with the hydraulic lifting clamp, the pipe column is clamped by the hydraulic lifting clamp, and the pipe column is lowered.

[0053] The lifting ring deviation device and the hydraulic lifting clamp are designed below the traveling block hook of the offshore workover rig. The lifting ring deviation device and the hydraulic lifting clamp can clamp the pipe column pushed by the second-floor mechanical arm or clamp the pipe column sent to the vicinity of the well mouth by the pipe rod conveyor. Finally, the pipe column is lifted or lowered under the drive of the traveling block hook.

[0054] The drilling floor mechanical arm is arranged on the drilling floor of the offshore workover rig. The drilling floor mechanical arm can support the pipe column lifted by the hydraulic lifting clamp on the drilling floor and place the pipe column in the drilling floor stand box. Alternatively, the drilling floor mechanical arm can push the pipe column placed in the stand box to the well mouth. In addition, the drilling floor mechanical arm can also push the pipe column lifted by the lifting clamp to deviate the pipe column to the direction of the pipe rod conveyor.

[0055] The automatic hydraulic tong is further arranged on the drilling floor of the offshore workover rig. The automatic hydraulic tong can extend to the well mouth to perform the make-up and break-out operation of the pipe column. When the lifting ring and the lifting clamp of the traveling block hook of the workover rig lower the pipe column to the vicinity of the well mouth, the automatic hydraulic tong can rotate by a certain angle to realize avoidance.

[0056] In the overall scheme of the offshore workover rig, the pipe rod conveyor is arranged on the module clamping plate of the offshore platform. The pipe rod conveyor can convey the pipe column placed on the pipe rack to the appropriate position of the well mouth and clamp the pipe column by the hydraulic lifting clamp. The pipe rod conveyor can support the pipe column pushed by the drilling floor mechanical arm and convey the entire pipe column from the drilling floor to the module deck.

[0057] The offshore workover rig is configured with various workover automation devices, such as a two-layer platform manipulator, a drilling platform surface manipulator, an automatic hydraulic tong, a hanger ring deflection device and a hydraulic elevator, the functions of each device are applied more in the prior art, and will not be described here again, the hydraulic drive mechanism can automatically operate according to the setting, and most offshore workover operations can be automatically performed under the cooperation of the devices, thereby reducing the labor intensity of the operation workers and the safety hazards of the personnel in the operation process.

[0058] The above merely describes a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An automated shore power energy storage offshore workover rig, provided with a shore power grid power supply end, a plurality of drilling and workover equipment and an electrically controlled energy storage system, characterized in that, The shore power supply end, the several drilling and workover equipment and the electric control energy storage system are all connected in parallel to the busbar; the electric control energy storage system comprises a rectifier module, a power conversion module, an energy storage module and an inverter module; the rectifier module is arranged between the shore power supply end and the busbar, the power conversion module is arranged between the energy storage module and the busbar, and the inverter module is arranged between the several drilling and workover equipment and the busbar.

2. An automated shore power energy storage offshore workover rig as defined in claim 1, wherein, The power conversion module is a bidirectional DC / DC power converter.

3. An automated shore power energy storage offshore workover rig as defined in claim 2, wherein, The several drilling and workover equipment are all AC motor driven.

4. An automated shore power energy storage offshore workover rig as defined in claim 3, wherein, The energy storage module is a storage battery pack; and the busbar is a DC busbar.

5. An automated shore power energy storage offshore workover rig as defined in claim 4, wherein, The inverter module comprises inverter units connected one-to-one with the several drilling and workover equipment; the inverter units are bidirectional inverters, and the bidirectional inverters are provided with input positive poles, input negative poles and AC input / output ends.

6. An automated shore power energy storage offshore workover rig as defined in claim 5, wherein, The positive pole and the negative pole of the storage battery pack are connected to the input positive pole and the input negative pole of the bidirectional DC / DC power converter respectively; the output positive pole of the bidirectional DC / DC power converter is connected to the DC busbar, and the output negative pole of the bidirectional DC / DC power converter is connected to the input negative pole of the bidirectional inverter.

7. An automated shore power energy storage offshore workover rig as defined in claim 6, wherein, The rectifier module comprises two sets of parallel rectifier units; and an interlocking circuit is arranged between the two sets of parallel rectifier units.

8. An automated shore power energy storage offshore workover rig according to claim 7, wherein, The storage battery pack is one or a combination of lead-acid batteries and lithium ion battery packs.

9. An automated shore power energy storage offshore workover rig according to any one of claims 1-6, wherein, A braking unit and a braking resistor are further included, and the braking resistor is connected to the busbar through the braking unit.

10. An automated shore power energy storage offshore workover rig according to any one of claims 1-6, wherein, The several drilling and workover equipment comprise winches, rotary tables and several mud pumps.

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