CN106972610B - Energy storage control system and control method for net electric power workover rig - Google Patents
Energy storage control system and control method for net electric power workover rig Download PDFInfo
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- CN106972610B CN106972610B CN201710235871.5A CN201710235871A CN106972610B CN 106972610 B CN106972610 B CN 106972610B CN 201710235871 A CN201710235871 A CN 201710235871A CN 106972610 B CN106972610 B CN 106972610B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000005520 electrodynamics Effects 0.000 claims abstract description 9
- 230000008439 repair process Effects 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 22
- 230000009471 action Effects 0.000 claims description 16
- 230000005611 electricity Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
Provided are an energy storage control system of a network electric power workover rig and a control method thereof. The well site power grid, the well site transformer, the power system and the operation working unit are sequentially connected; the power system comprises a power control unit, an energy storage unit and a power unit, wherein: the power control unit is connected with the well site transformer and is used for connecting well site electric energy; the power control unit is used for controlling the energy storage unit and the power unit, and the power unit drives the operation working unit to work, so that well repair operation is completed. In addition, the invention also comprises a control method of the energy storage control system of the network electrodynamic workover rig. The high-power electric power well repairing machine has the advantages that the existing power grid is used for supplying power to the high-power well repairing machine, the high efficiency of work of the electric power well repairing machine is guaranteed, and the operation cost is reduced.
Description
Technical Field
The invention relates to the technical field of petroleum workover rig, in particular to a workover rig energy storage control system applying network electrodynamic force and a control method thereof.
Background
The vehicle-mounted workover rig is mobile equipment widely applied to workover operation and is used for construction operation for recovering normal production of an oil-water well or improving production capacity, and mainly comprises pump detection, sand washing, well flushing, sealing-up and water plugging, etc., the operation mode of the workover rig is mainly lifting and lowering of an oil pipe and a sucker rod, and the working process comprises three working steps of lifting, shackle and lowering.
At present, the conventional workover rig takes a diesel engine as a working power source, and has high workover cost due to high price of finished oil, high energy consumption and the like, and the fuel power workover rig also has the environmental protection problems of low energy conversion rate, high pollution emission, high working noise and the like. Compared with diesel engine power workover rig, the electric workover rig has the advantages of environmental protection, low operation cost, low noise, high transmission efficiency, improvement of working conditions of operators and the like, and gradually replaces diesel engine power workover rig.
The oil field power grid is equipped with power according to the pumping unit, and is conveyed by the main power grid through the well site transformer for the pumping unit to use. At present, a single-well single-change power supply mode is mostly adopted, namely, one transformer supplies power for one pumping unit; the multi-well single-change power supply mode is adopted in a part of areas, namely, one large-capacity transformer is used for supplying power to a plurality of oil wells, so that the load rate of the transformer is improved, and the loss is reduced. The capacity of a single-well single-change well site transformer is mostly 30-50 kVA, the installed power of the vehicle-mounted workover rig is far greater than the equipped power, and if the vehicle-mounted workover rig is connected with a nearby well site transformer, the power supply balance of a power grid can be broken due to the power supply of an electric workover rig, so that the normal work of other pumping units or electric equipment is affected. If the input power of the electric workover rig is matched according to the capacity of the well site transformer, the operation efficiency of the electric workover rig is inevitably greatly reduced, and the operation timeliness is affected. If the power supply capacity of the power grid is increased according to the power requirement of the petroleum workover rig, the capacity of the transformer in the well site is increased, the investment is huge, and the power grid utilization rate is very low under the oil extraction working condition, so that a great amount of power grid resources are wasted.
Disclosure of Invention
The invention provides a network electrodynamic force workover rig energy storage control system and a control method thereof, which aim to overcome the defects of unmatched power requirements of the existing well site network electricity and an electric workover rig, low workover operation efficiency and high cost.
The technical scheme adopted for solving the technical problems is as follows: the energy storage control system of the network electrodynamic workover rig comprises a well site power grid and a well site transformer, wherein high-voltage power transmitted by the well site power grid is connected to the workover rig after passing through the well site transformer, and the well site power grid, the well site transformer, a power system and an operation working unit are connected in sequence;
the power system provides rotary power for the net electric power workover rig and is arranged on a self-propelled chassis of the workover rig; the operation working unit converts the rotary power output by the power system into linear lifting power for completing the lifting operation of the net electric power workover rig, and the net electric power workover rig is carried by a self-chassis of the workover rig and starts working after being installed on site.
The power system comprises a power control unit, an energy storage unit and a power unit, wherein: the power control unit is connected with the well site transformer and is used for connecting well site electric energy; the power control unit is used for controlling the energy storage unit and the power unit, and the power unit drives the operation working unit to work, so that well repair operation is completed.
The energy storage unit is an energy storage element, and the specific energy form comprises electric energy or hydraulic pressure; when the power system is in an electric driving mode, the energy storage unit is a storage battery and a super capacitor; when the power system is in a hydraulic drive form, the energy storage unit is a hydraulic accumulator.
A control method of the energy storage control system of the network electrodynamic workover rig comprises the following steps:
step A, setting an action set value V of direct-current side voltage of an energy storage control system of a net electric power workover rig 0 ；
Step B, the direct-current side voltage value V monitored in real time by the power control unit is obtained 1 With action set point V 0 Comparing to determine whether the power unit is in a working state;
step C, when the measured DC side voltage value is greater than or equal to the operation settingAt the time of setting, namely: v (V) 1 ≥V 0 The power unit is in a non-working state, the power control unit automatically starts a charging mode of the energy storage unit, and energy of the network power supply is transferred into the energy storage unit; after the energy storage unit is fully charged, the power control unit automatically closes the charging function of the energy storage unit;
step D, when the voltage value of the direct current side is smaller than the action set value, namely: v (V) 1 ＜V 0 The power unit of the power system is in a working state, and under the control of the power control unit, the power unit is supplied with energy of the network power supply, and the voltage value of the direct current side is monitored; the power control unit automatically starts a discharging mode of the energy storage unit, and the network power supply and the energy storage unit simultaneously provide electric energy for the power unit;
step E, when the measured DC side voltage value is more than or equal to the action set value, namely: v (V) 1 ≥V 0 The power unit is in a non-working state, the power control unit automatically starts the charging mode of the energy storage unit again, and the energy of the network power supply is transferred into the energy storage unit; after the energy storage unit is fully charged, the power control unit automatically closes the charging function of the energy storage unit;
step F, after the charging is completed, the power control unit automatically closes the charging function of the energy storage unit and prepares for the next working cycle;
and B-F, performing cyclic reciprocation according to the requirements of well workover tripping operation, lifting and tripping operation until well workover operation is completed, and finishing the work.
Operation set value V of DC side voltage 0 And determining according to the direct-current side voltage, wherein the direct-current side voltage is the standard power voltage of the well site multiplied by the direct-current side voltage coefficient. When the standard power voltage of the well site is 380V, the voltage coefficient of the direct current side is。
The working state of the power unit means that the workover rig is in the lifting process; the power unit is in a non-working state, namely the workover rig is in a lowering or breaking-out process.
The step C is a lowering operation process of the workover rig; step D is a lifting operation process of the workover rig; and E, the step is a shackle and/or a lowering operation process of the workover rig.
The invention has the beneficial effects that the design is reasonable, the transformer can be directly connected into a well site for the pumping unit to work nearby, the existing power grid is utilized for supplying power to the high-power workover rig, the high efficiency of the work of the network electrodynamic workover rig is ensured, and the normal power supply of the existing power grid and the normal use of other electric equipment are not influenced, thereby reducing the workover energy consumption, reducing the operation cost, simultaneously protecting the environment and realizing the 'electricity replacing oil' of the workover operation.
Drawings
FIG. 1 is a schematic diagram of an energy storage control system of a net electric power workover rig of the present invention.
FIG. 2 is a flow chart of a control method of the network electric power workover rig energy storage control system of the present invention.
In the figure: 1. the system comprises a well site power grid, a well site transformer, a power system, a working unit, a power control unit, an energy storage unit and a power unit.
Detailed Description
The invention is further described below with reference to the drawings and examples. However, it should be understood by those skilled in the art that the present invention is not limited to the specific embodiments listed and should be included within the scope of the present invention as long as the spirit of the present invention is satisfied.
Referring to fig. 1, a schematic diagram of an energy storage control system of a net electric power workover rig of the present invention. The invention relates to an energy storage control system of a network electrodynamic workover rig, which mainly comprises a well site power grid 1, a well site transformer 2, a power system 3 and an operation working unit 4, wherein the well site power grid 1, the well site transformer 2, the power system 3 and the operation working unit 4 are connected in sequence; and high-voltage power transmitted by the well site power grid 1 is connected into the well repair power system 3 after passing through the well site transformer 2. The power system 3 provides rotary power for the net electric power workover rig and is arranged on a self-propelled chassis of the workover rig; the operation working unit 4 is used for completing the lifting operation of the workover rig, and can convert the rotary power output by the power system into linear lifting power, and the linear lifting power is carried by the self-chassis of the workover rig and starts working after being installed on site.
The power system 3 comprises a power control unit 5, an energy storage unit 6 and a power unit 7, wherein: the power control unit 5 is connected with the well site transformer 2 and is used for connecting well site electric energy; the power control unit 5 is used for controlling the energy storage unit 6 and the power unit 7, and the power unit 7 drives the working unit 4 to work, so that well repair operation is completed.
In particular, the energy storage unit 6 is an energy storage element, the specific energy form comprising electric energy or hydraulic or other energy; when the power system 3 is in an electric drive mode, the energy storage unit 6 is a storage battery and a super capacitor; when the power system 3 is in the form of a hydraulic drive, the energy storage unit 6 is a hydraulic accumulator. When other energy modes are adopted, the energy storage unit 6 is a corresponding component.
The workover treatment process of the workover rig is divided into two stages, namely lifting and lowering a tubular column, each stage comprises a plurality of lifting and lowering working processes, the workover rig is periodically required for power in the working process, the working process can be divided into three operation steps, namely lifting, breaking out and lowering, and the time consumption of the three steps is basically the same, and the three steps respectively occupy one third of the total time consumption of one cycle. In the three operation steps, the output power of the workover rig is maximum (namely, the energy consumption is maximum) in the lifting process, and no power or only less power is needed in the shackle and lowering processes. For this reason, during the lifting operation of the workover rig, the power unit 7 is in an operating state; during the tripping or tripping operation of the workover rig, the power unit 7 is in a non-operational state.
Referring to fig. 2, a flow chart of a control method of the energy storage control system of the network electric power workover rig of the invention. The invention relates to a control method of an energy storage control system of a network electrodynamic workover rig, which comprises the following specific steps:
step A, setting an action set value V of direct-current side voltage of an energy storage control system of a net electric power workover rig 0 ；
Step B, the direct-current side voltage value V monitored by the power control unit 5 in real time is obtained 1 With action set point V 0 Comparing to determine whether the power unit 7 is in an operating state;
step C, when the measured DC side voltage value is more than or equal to the action set value, namely: v (V) 1 ≥V 0 The power unit 7 is in a non-working state, the power control unit 5 automatically starts a charging mode of the energy storage unit 6, and energy of the network power supply is transferred into the energy storage unit 6; after the energy storage unit 6 is fully charged, the power control unit 5 automatically turns off the charging function of the energy storage unit 6;
step D, when the voltage value of the direct current side is smaller than the action set value, namely: v (V) 1 ＜V 0 The power unit 7 of the power system 3 is in an operating state, and under the control of the power control unit 5, the power unit 7 is supplied with energy of a network power supply, and the voltage value of the direct current side is monitored; the power control unit 5 automatically starts a discharging mode of the energy storage unit 6, and the power unit 7 is simultaneously supplied with electric energy by the grid power supply and the energy storage unit 6;
step E, when the measured DC side voltage value is more than or equal to the action set value, namely: v (V) 1 ≥V 0 The power unit 7 is in a non-working state, the power control unit 5 automatically starts the charging mode of the energy storage unit 6 again, and the energy of the network power supply is transferred into the energy storage unit 6; after the energy storage unit 6 is fully charged, the power control unit 5 automatically turns off the charging function of the energy storage unit 6;
and F, after the charging is completed, the power control unit 5 automatically turns off the charging function of the energy storage unit 6 and prepares for the next working cycle.
And B-F, performing cyclic reciprocation according to the requirements of well workover tripping operation, lifting and tripping operation until well workover operation is completed, and finishing the work.
In the control method, the operation set value V of the dc side voltage 0 The DC side voltage is usually determined according to the DC side voltage, which is the standard power voltage of the well site multiplied by the DC side voltage coefficient, and when the standard power voltage of the well site is 380V, the DC side voltage coefficient is。
Operation set value V of DC side voltage 0 Can also be determined according to a threshold value which needs to be set on site according to the load conditionAnd (5) setting.
In the control method, the step C is a lowering operation process of the workover rig; step D is a lifting operation process of the workover rig; and E, the step is a shackle and/or a lowering operation process of the workover rig.
When the workover rig starts to work, the power unit drives the operation working unit to start and descend, the power control unit monitors the voltage value of the direct current side in real time, when the detected voltage value is more than or equal to the action set value, the well site transformer charges the energy storage unit, when the power unit starts to work, the power control unit stops charging the energy storage unit, and the power unit is directly driven through the well site transformer; when the voltage of the direct current side is smaller than the action set value, the power control unit automatically discharges the energy storage unit so as to supplement the input power of the operation working unit, ensure the stable output of the power unit and further complete a complete lifting and lowering process.
The invention utilizes the cycle working characteristic of the workover rig, and ensures enough time to supplement enough electric energy for the energy storage unit in the non-operation time (about two thirds of the working cycle period) of the shackle and the drop; in the lifting operation time (about one third of a working cycle period), the energy storage unit provides electric energy for the power unit; and the reciprocating operation is performed circularly, so that the electricity requirement of the workover rig in the whole workover process is met.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a net electrodynamic force workover rig energy storage control system, includes well site electric wire netting, well site transformer, and behind the well site transformer, the high-voltage electricity that well site electric wire netting carried, inserts the workover rig, characterized by:
the well site power grid (1), the well site transformer (2), the power system (3) and the operation working unit (4) are sequentially connected;
the power system (3) provides rotary power for the net electric power workover rig and is arranged on a self-propelled chassis of the workover rig;
the operation working unit (4) converts the rotary power output by the power system into linear lifting power for completing the lifting operation of the net electric power workover rig, is carried by a self-chassis of the workover rig, and starts working after being installed on site;
the power system (3) comprises a power control unit (5), an energy storage unit (6) and a power unit (7), wherein:
the power control unit (5) is connected with the well site transformer (2) and is used for connecting well site electric energy;
the power control unit (5) is used for controlling the energy storage unit (6) and the power unit (7), and the power unit (7) drives the work unit (4) to work, so that well repair work is completed.
2. The network electric power workover rig energy storage control system of claim 1, wherein: the energy storage unit (6) is an energy storage element, and the specific energy form comprises electric energy or hydraulic pressure; when the power system (3) is in an electric driving mode, the energy storage unit (6) is a storage battery and a super capacitor; when the power system (3) is in a hydraulic drive form, the energy storage unit (6) is a hydraulic accumulator.
3. A control method of the energy storage control system of the network electric power workover rig, which comprises the following steps:
step A, setting an action set value V of direct-current side voltage of an energy storage control system of a net electric power workover rig 0 ；
Step B, the direct-current side voltage value V monitored in real time by the power control unit (5) 1 With action set point V 0 Comparing to determine whether the power unit (7) is in an operating state;
step C, when the measured DC side voltage value is more than or equal to the action set value, namely: v (V) 1 ≥V 0 The power unit (7) is in a non-working state, and the power control unit (5) automatically starts the charging mode of the energy storage unit (6)Transferring the energy of the network power supply into an energy storage unit (6); after the energy storage unit (6) is fully charged, the power control unit (5) automatically closes the charging function of the energy storage unit (6);
step D, when the voltage value at the direct current side is smaller than the action set value, namely: v (V) 1 ＜V 0 The power unit (7) of the power system (3) is in a working state, and under the control of the power control unit (5), the power unit (7) is supplied by the energy of the network power supply, and the voltage value of the direct current side is monitored; the power control unit (5) automatically starts a discharging mode of the energy storage unit (6), and the power supply and the energy storage unit (6) simultaneously supply electric energy for the power unit (7);
step E, when the measured DC side voltage value is more than or equal to the action set value, namely: v (V) 1 ≥V 0 The power unit (7) is in a non-working state, the power control unit (5) automatically starts the charging mode of the energy storage unit (6) again, and the energy of the network power supply is transferred into the energy storage unit (6); after the energy storage unit (6) is fully charged, the power control unit (5) automatically closes the charging function of the energy storage unit (6);
step F, after the charging is completed, the power control unit (5) automatically closes the charging function of the energy storage unit (6) and prepares for the next working cycle;
and B-F, performing cyclic reciprocation according to the requirements of well workover tripping operation, lifting and tripping operation until well workover operation is completed, and finishing the work.
4. A method of controlling an energy storage control system for a net-powered workover rig according to claim 3, wherein: an operation setting value V of the DC side voltage 0 And determining according to the direct-current side voltage, wherein the direct-current side voltage is the standard power voltage of the well site multiplied by the direct-current side voltage coefficient.
5. The control method of the energy storage control system of the network electric power workover rig according to claim 4, wherein the control method is characterized by comprising the following steps: when the standard power voltage of the well site is 380V, the voltage coefficient of the direct current side is。
6. The control method of the energy storage control system of the network electric power workover rig according to claim 5, wherein the control method is characterized by comprising the following steps: the working state of the power unit (7) means that the workover rig is in the lifting process; the non-working state of the power unit (7) means that the workover rig is in the process of being lowered or unbuckled.
7. The control method of the energy storage control system of the network electric power workover rig according to claim 6, wherein the control method is characterized by: the step C is a lowering operation process of the workover rig; step D is a lifting operation process of the workover rig; and E, the step is a shackle and/or a lowering operation process of the workover rig.
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| CN201710235871.5A CN106972610B (en) | 2017-04-12 | 2017-04-12 | Energy storage control system and control method for net electric power workover rig |
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| CN201710235871.5A CN106972610B (en) | 2017-04-12 | 2017-04-12 | Energy storage control system and control method for net electric power workover rig |
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| US8408312B2 (en) * | 2010-06-07 | 2013-04-02 | Zeitecs B.V. | Compact cable suspended pumping system for dewatering gas wells |
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