JPS61136341A - Oil well control device - Google Patents

Abstract

PURPOSE:To execute centralized control of an engine by installing plural slave stations provided with a control device of an engine, in a prescribed area, transmitting the information of an operating state of the engine to a master station, and controlling each engine by a command from the master station. CONSTITUTION:Plural slave stations 13 provided with an engine used as a power source of an oil well pump jack 7, and a control device of this engine are installed in a prescribed area 15. Also, a master station 14 which can execute a centralized monitor and remote control or plural slave stations 13 is installed. In this state, data of an engine revolving speed for showing an operating state of the engine, a cooling water temperature, a cooling water level, a lubricating oil pressure, a lubricating oil level, and the number of strokes of the oil well pump jack 7 are transmitted to the master station 14 from the slave station 13, and by a command from the master station 14, a start and stop of the engine, and control of its revolving speed are executed. In this way, the engine of the slave station 13 can be managed concentrically by the master station 14, and labor saving can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an oil well control system, and more particularly to an oil well control system that uses an engine as a power source for an oil well pump jack that operates in an unmanned environment.

Prior Art Regarding the monitoring and control of oil well pump jacks, the use of an electric motor as the driving power source has been proposed, for example in U.S. Pat. It is used as. However, electric motors cannot of course be used in areas without power lines, and engines are used in such areas. At this time, if a gas engine is used as the engine, it is possible to use self-injected petroleum gas from an oil well as fuel, which has the advantage of reducing running costs.

Incidentally, engines have unique monitoring items and control methods, such as cooling water temperature and lubricating oil pressure, that electric motors do not have, and the prior art does not provide any response in this regard. That is,
Conventionally, all of the above engine monitoring and control has relied on human skill, and a patrol supervisor called a pumper has to go to the site where the pump is installed and monitor the operating status of the engine - or control starting, stopping, etc. The problem is that it is unavoidable.

Problems to be Solved by the Invention Therefore, the present invention makes it possible to monitor an oil well pump using an engine as a power source at a remote location, and also to control the engine at this remote location.

Means for Solving the Problems The present invention provides a system in which a plurality of slave stations each having an engine used as a power source for an oil well pump jack and a control device for the engine are provided within a certain area, and the plurality of slave stations are A master station that can be centrally monitored and remotely controlled is provided within the certain area, and the slave station monitors the engine speed, cooling water temperature, cooling water level, and lubrication oil pressure, which indicates the operating status of the engine.

It is configured to be able to take in data on the lubricating oil level and the stroke number of the oil well pump jack and send it to the master station, and also to start, stop, and control the engine speed based on commands from the master station. .

Function: With this arrangement, data indicating the operating state of the engine can be centrally monitored at the master station, and an operator can arbitrarily remotely control the engine at the master station.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Figures 1 and 2, (1) is a pump unit for pumping crude oil, which includes a reciprocating pump jack (2) and a water-cooled gas engine (3) to drive this pump jack (2). (4) is a tank for storing the pumped crude oil.A gas engine (3)
) is fueled by self-propelled petroleum gas obtained from the pump unit (1). (6th item: In the control box of the gas engine (3), use the gas engine (3rd item ζ
A power line [7] having an electric cable etc. for starting the gas engine (3) and a signal line (8) for detecting the operating status of the gas engine (31) are passed between the gas engine (3). (9) is an antenna attached to the pole αG, which is used to transmit and receive signals wirelessly between the control box (6) and the master station described later.The antenna (9) on the east A cable connecting the control box (6) and 4 are lightning rods.

The slave stations are configured as described above, and a plurality of slave stations are scattered within an area (property) with a radius of about 25 km centered on the master station α4, and a pump unit (1) is installed for each slave station. It is used to pump crude oil.

The master station σ has a computer α for centrally controlling each slave station. qη is an antenna for transmitting and receiving signals with each slave station, (to) is a pole, and 4 is a lightning rod.

Note that the master station aΦ and the slave station may be connected by wire, or as shown in the figure, the master stations α4 in a plurality of regions (to) can be further centrally controlled by the control station (2).

FIG. 3 shows the slave station port in more detail.

Here, the battery is used for starting the gas engine (3) and supplying power to the control box (6), and is charged by a charger attached to the gas engine (3). The cable is a charging cable and is included in the power line (7) mentioned above. Note that each cable is configured to be passed through a protection tube gate ζ. (To) is the foundation for supporting the pole cry, and (F) is the ground plate connected to the lightning rod port.

FIG. 4 shows the control box (6) in detail. The control box (6) is formed in the shape of a box with an opening/closing door, and a control device is installed inside the box. (to) is the circuit board, (b) is the terminal block, and (g) is the external connection connector. The control device (a) is provided with a display member for displaying data input to the control device (b). (7) is a channel changeover switch for multiple data. In addition, inside the control box (6), there is a thermostat C installed at the bottom of the control device (to) in order to detect the atmosphere preference of the control device (to) in this control box (6).
3. Door switch that detects opening and closing of the door (to)
and a thermometer (not shown) protruding from the control box (6) to detect the outside temperature.

As data input to the control box (6) of the slave station,
There are the following: First, the engine speed, cooling water level, cooling water temperature, lubricating oil level, and lubricating oil pressure are input from the gas engine (3). In addition to the above-mentioned ambient temperature, door opening/closing signal, and outside air temperature, data from the control box (6) itself includes battery voltage and a slave port set in the control device for naming the slave port. The station number is entered. Furthermore, in order to detect the operating state of the pump jack (2), the number of strokes of the pump jack (2) per unit time is input. Among the above, lubricating oil pressure,
Cooling water temperature, battery voltage, and outside air temperature are input as analog signals, and others are input as digital signals.

FIG. 5 shows a block diagram of the slave station entrance.

Here, (e) is the aforementioned control device, (to) is the CPU,
- is ROM% (to) is ■ and (to) is bus. (
B) is an interface for inputting the aforementioned digital signal, and (to) is an input port. Also,(
(to) is an interface for inputting the above-mentioned analog signal, and is connected to the A/D converter. Yu is a clock circuit, which serves as the reference time axis when inputting engine speed and pump jack stroke number. - is an output port for digital signals, and is connected to the starter motor of the gas engine (3) and the spark plug operation switch (both not shown) of the same engine (3) via the interface. This is the power supply line from the battery to the control device (2), and a switch ■ is interposed in the middle. - is a relay for operating switch 4, and this relay - is also connected to the interface. ■ is A D/A converter for outputting analog signals, connected to a gas engine (3
) is connected to an electronic governor (not shown).

- is a communication circuit for communicating between the slave station port and the master station (b), the phrase is a parallel-to-serial converter for digital signals, and the same is a modem for frequency modulating or demodulating serial digital data. , the figure shows a radio.

FIG. 6 shows a block diagram of the control device port of the master station, - indicates c
pυ, - is a clock circuit, import is ROM, [71 is ~y,
And - is a bus. – is the parallel digital signal.
A serial converter that is connected to the operating computer αQ via a driver and receiver.
Data can be transmitted between the controller and the controller.

The terminal is a communication circuit similar to that of a slave station, and includes a parallel-to-serial converter, a modem, and a radio.

The operation based on the above configuration will be explained below. Each slave station port is controlled by a so-called polling method in which data is exchanged after the master station a4 calls each slave station one by one. FIG. 7 shows a flowchart of the slave station, where it is first determined whether there is data received from the master station α4. If there is no received data, the digital and analog data from each sensor is captured and stored in memory. Next, based on the above data, it is determined whether there is any abnormality in the gas engine (3). If some abnormality occurs, such as an excessive rise in the cooling water temperature, the power supply to the spark plug is cut off to stop the engine (3), and in other cases, the process proceeds to the next step.

Next, it is determined whether the door of the control box (6) is open or closed. When the door is open, it means that the worker patrolling the slave station entrance is opening the control box (6) and inspecting its interior, so the display screen is energized to display data. is possible. In other cases, the display section is not energized and the control loop is circulated. That is, the display section is energized only when the door of the control box (6) is opened, and on the other hand, when the door is closed, energization is prevented, thereby extending its life.

If there is data received from the master station α barrel, it is determined whether or not it is polling of the own station, and if it is not polling of the own station, the control loop is circulated so that the presence or absence of received data is determined again. . If it is polling your own station,
It is determined whether the signal from the master station α4 is an engine control command, and if it is an engine control command, the control such as starting, stopping, and rotation speed control of the gas engine (3) is executed according to the command, and after τ, The control loop is cycled. If it is not an engine control command, the data stored as described above is transmitted to the master station q4, and then the control loop is circulated.

The door switch (to) is connected to the control box (6) as mentioned above.
Detects whether the door is open or closed, and displays it only when the door is open)
In addition to this, by sending door opening/closing information to the master station α-hiro, if the patrol worker forgets to close the door, the master station σ-hiro can detect this. In addition to preventing dust from entering due to the control box (6) being left open for a long period of time, it is also possible to manage whether or not the patrol worker has carried out patrol work from the master station σ.

FIG. 8 shows the control sequence when the voltage of the battery (b) decreases. In other words, if the capacity of the battery (to) decreases due to a drop in outside temperature, etc., and the voltage between its terminals drops significantly, there is a risk that the control bag aP9, which uses the battery as a power source, may malfunction. If so, open the switch and turn on the control device.
This is an attempt to cut off the power supply to the In FIG. 8, it is assumed that the battery voltage is normally 1 g and 8 V.

Now, for some reason, the battery voltage has started to drop, and the
．． If the voltage drops to a dangerous area of 0V or less, an alarm is issued when the voltage reaches this dangerous area, and the information is notified to the master station rJ41ζ at the next polling, and then the power to the control device (rJ41ζ) is turned off. This ensures that the above information is notified to the master station a4. If the battery voltage is restored again, escape from the danger area.
(to the control device when it exceeds V and reaches about 11.0V)
Stable operation is possible by applying power to the device and providing a suitable amount of hysteresis.

Figure 9 shows the control device (
This shows the control sequence when the ambient temperature (to) rises or falls abnormally. That is, since there is a risk that the control device (7) may malfunction even when the ambient temperature changes in this way, the power supply to the control device (7) is cut off at an appropriate time. In FIG. 9, the dangerous temperature on the low-temperature side is -15°C, and the dangerous temperature on the high-temperature side is 60°C. If the temperature rises, the Δnorm will be emitted as soon as it exceeds 60℃ and enters the danger zone, and the next time polling will notify the master station a → of this information, and then open the switch (c).
This turns off the power to the control device. In this way, it becomes possible to reliably notify the master station α of the above information. If the ambient temperature returns to the safe area again, the temperature must exceed 60°C to escape from the danger area.
When the temperature reaches about 5° C., the alarm is turned off and the power to the control device (7) is turned on, thereby providing a suitable amount of hysteresis to enable stable operation.

If the temperature drops, an alarm will be issued when the temperature exceeds -15°C and enters the danger zone, and the same information as when the temperature rises will be notified to the master station σhiro at the next polling, and then the power will be turned off. ing. Even when the ambient temperature returns to the safe range, operation is stabilized by turning on the power only when the temperature reaches -10°C. Figure 10 shows a flowchart of the master station. First, it is determined whether there is a command input, that is, a keyboard input from the operating computer, and if there is no command input, the set value n of the slave station number of the slave station port to be polled is increased by "1". Next, the n you just set is the maximum number of slave stations n
□. Determine whether it exceeds this, and if it does not exceed this,
Determine whether to poll the slave port with number n. On the other hand, if n exceeds nfflmx, this n is reset to the minimum value nff1In of the slave station number, and then this number n
Determine whether to poll the child station's port.

Settings as a slave station corresponding to each slave station number are performed by keyboard input on the computer Q0 through command analysis described later, but when there is no slave station port corresponding to number n, that is, when number n is an empty station. does not poll and the control loop is cycled. If a slave station corresponding to number n exists, this slave station Q3 is polled and the status of the slave station is displayed on the CRT, printer, etc. of the computer α. FIG. 11 shows an example of display by a printer.

That is, data indicating the slave station number n, slave station name (label), and operating status of the slave station are printed on one line of the printer. Here, if the detection data at the slave station port is normal, a green mark will be printed (or a CRT) will be printed (or a CRT
), and in the case of slave station 0 including red mark 4, it is separately printed along with the polling time as shown in the figure to alert the operator.

Once the status of the slave station has been displayed, the next time the slave station □
Determine whether □□ has issued a stop request. If there is no stop request, the control loop continues to circulate; if there is a stop request, a stop permission signal is issued to the slave station, and then the control loop continues to circulate.

In FIG. 10, if a command is input, command analysis is performed. This command analysis routine is the 12th command parsing routine.
As shown in the figure, first, it is determined whether or not there is an engine control command, and if there is, the gas engine (3) is started, stopped, and controlled as requested, such as one rotation speed control. As mentioned above, since the slave station □□□ sends a signal corresponding to the number of strokes per unit time of the pump jerk (2), that is, the amount of crude oil pumped, the gas engine (3)
) can be controlled as appropriate. In addition, since crude oil generally contains a large amount of muddy water, there is a risk of freezing if the temperature drops below freezing, but based on the outside temperature signal from the slave station, if there is a risk of freezing, the gas engine (3)
By stopping the operation of the gas engine (3) and pump jack (2), it is possible to prevent overload from acting on the gas engine (3) and pump jack (2).

If there is no engine control command, then the presence or absence of a polling stop command and the presence or absence of a polling start command are determined, and if these are present, processing is performed accordingly. If there is no command, then it is determined whether there is a slave station registration command. If this command is present, a new slave station Q can be registered in any of the open stations with slave station number n described above.

Next, it is determined whether there is a slave station polling skip command. If this command is present, the slave station number being polled in FIG.
If 3) is stopped, you can skip 3) and poll. Finally, it is determined whether there is a slave station designated polling command. If this command is present, data can be exchanged with a specific slave station even during polling in FIG. 10.

When the processing of any command is completed, or when the command analysis routine is executed but no command is executed, the process returns to the loop shown in FIG. 10.

Furthermore, by storing the polling data in the memory of the computer trout.

It is also possible to obtain the history of engine troubles of the gas engine (3) in each slave station.

Effects of the Invention As described above, according to the present invention, data indicating the operating state of the engine can be centrally monitored at the master station.
It is possible to significantly reduce the labor required for patrol monitoring activities, shorten the monitoring cycle time and improve monitoring accuracy, thereby significantly improving the functional protection of oil well pump units and engines. Moreover, it is possible to improve the maintenance efficiency of the device. Furthermore, since the operator can arbitrarily control the engine at the master station, it is possible to operate the oil well from a business standpoint and perform pumping operations that take into account the amount of oil that can be produced from the oil layer.

[Brief explanation of drawings]

Fig. 1 is an overall bird's eye diagram of an embodiment of the present invention, Fig. 2 is a schematic configuration diagram of a master station and a slave station, Fig. 8 is an overall diagram of a slave station, and Fig. 4 is a control box of a slave station. FIG. 5 is a block diagram of the slave station, FIG. 6 is a block diagram of the master station, FIG. 7 is a control flowchart of the slave station, FIG. 8 is a diagram showing battery voltage fluctuations, Fig. 9 is a diagram showing the fluctuation state of the ambient temperature, Fig. 1O is a diagram showing the control flowchart of the master station,
FIG. 11 is a diagram showing an example of a computer's printer output, and FIG. 12 is a diagram showing a control flowchart of command analysis in the master station. (2)...Pump jack, (33...Gas engine, (61...Control box, Port...Slave station, σ4...
・Master station, a...Combination part, -...Selector switch,
on-...Thermostat, (2)...Door switch, (Foundation)...Power supply line, -...Switch, -...
·Control device

Claims (1)

[Claims] 1. A plurality of slave stations equipped with an engine used as a power source for an oil well pump jack and a control device for the engine are provided in a certain area, and the plurality of slave stations are intensively monitored. and a remotely controllable master station is provided within the certain area, and the slave station is configured to display information such as engine rotation speed, cooling water temperature, cooling water level, lubricating oil pressure, lubricating oil level, and stroke of the oil well pump jack, which indicate the operating status of the engine. An oil well control device characterized in that it is configured to be able to take in numerical data and transmit it to a master station, and also to be able to start, stop, and control the rotational speed of an engine based on commands from the master station.