RU2378507C2 - Device to control operating gas or oil well - Google Patents

Abstract

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil-and-gas industry, particularly to devices designed to control the state of operating gas or oil wells. Proposed device comprises controlled power supply, microprocessor incorporating ADC and DAC, pickup signal switch, permanent memory, radio modem, and vernier unit with its one input connected to switch output and output connected to DAC out, and its other input connected to the input of the other DAC. Note here that microprocessor serves to allow single transmission of parametres as SMS-messages via both main telephone line and additional line.

EFFECT: comprehensive control and accurate measurements of hard-to-access well parametres.

1 dwg, 3 cl

Description

The invention relates to the oil and gas industry, in particular to devices for monitoring the state of a working gas or oil well, namely, to control wellhead parameters of existing wells located in remote areas.

A well-known wireless two-way telemetry system comprising a conductive piping system located in a wellbore, one or more devices electrically connected to a piping system in a wellbore for wirelessly receiving a time-varying electrical signal applied to a piping system, and at least one device for reading or controlling a physical characteristic in a wellbore located in close proximity to the wellbore us. (Application for invention RU No. 2002122759, CL ЕВВ 47/12, publ. 2004) [1].

The disadvantage of this telemetry system is the need for transmitting signals of the presence of an electrically conductive piping system, which does not allow transmitting signals from the well to a remote control room.

A device for recording parameters of an installation for repairing wells is known, comprising a power supply unit, a portable memory unit, a measurement unit including a pipe movement measuring sensor, wellhead pressure sensor, pad pressure sensor, light and heavy pipe weight pressure sensors, process fluid pressure sensors, a sensor chain tension pressure sensor, engine hours meter, and registration unit, including analog-to-digital converter, light and sound alarm, indication unit, display, microcontroller and cells viaturu. (Application for invention RU 2002124642/03, CL ЕВВ 19/00, published on September 17, 2002) [2].

The disadvantage of this device is the limited scope, in particular the impossibility of operational monitoring of wellhead parameters (pressure, temperature, flow, humidity, etc.) of wells located in hard-to-reach areas, where the transmission of information to a remote control center is possible only by radio channel.

The closest in technical essence and the achieved result to the claimed device for monitoring the state of a working gas or oil well is a device for monitoring the state of oil well equipment containing an analog-to-digital converter, a memory unit, a display unit for the current data value, a personal computer with an electrical connector, a control unit with a key to start measurements and a current sensor in the form of clamp meters. (Patent for invention RU No. 2184226, CL ЕВВ 47/00, publ. 06/27/2002) [3].

The disadvantage of this device is the impossibility of operational monitoring of wellhead parameters of wells located in remote areas and having communication with a remote control center only over the air.

The objective of the present invention is the provision of operational control and improving the accuracy of measurements of wellhead parameters of wells located in remote areas.

The essence of the present invention lies in the fact that the known device for monitoring the state of a working gas or oil well containing a controlled power supply, a microprocessor, including analog-to-digital and digital-to-analog converters, wellhead parameters sensors, sensor signal switch, non-volatile memory unit, radio modem, according to the invention, additionally contains a nonius block, one input of which is connected to the output of the switch, another input is connected to the output of the digital-to-analog converter, and the output q is connected to the input of the second analog-to-digital converter, the microprocessor is designed to provide, after programming and commissioning, a one-time control transmission of parameters in the form of an SMS message using either the main telephone number or the additional number.

In this case, the microprocessor is made capable of providing, in the event of a temporary lack of communication, the transmission of non-transmitted data the next time the radio modem is turned on.

In addition, the microprocessor is designed to provide, when the value of any wellhead parameter of the emergency threshold is reached, extraordinary data transmission via the main telephone number.

The drawing shows a functional diagram of the proposed device.

The device includes wellhead parameters sensors (for example, pressure, temperature, moisture, flow and noise sensors) 1-5, the outputs of which are connected to the inputs of the switch 6, the output of which is connected to the input of the first analog-to-digital converter of microprocessor 7 and to the first input of the nonius block 8 The second input of the nonius block is connected to the output of the digital-to-analog converter of the microprocessor 7, and the output of the nonius block is connected to the input of the second analog-to-digital converter. The non-volatile memory unit 9 is connected by a data bus and an address bus to the microprocessor 7. The RS-signal conversion unit 10 converts the TTL levels at the output of the microprocessor 7 to the standard levels for the RS-channel for coordination with the interface of the radio modem 11 and the interface of a personal computer 12 connected for programming the device and start it up. An autonomous power supply unit, for example, a battery 13, is connected to a controlled power supply unit 14, the control input of which is connected to the microprocessor 7, and the output to all nodes of the device. Through a voltage divider 15, an autonomous power supply 13 is connected to the input of the switch 6.

The device operates as follows.

To program the operating mode of the device and start its personal computer 12 through the conversion unit 10 is connected to the microprocessor 7. In this case, the following parameters are set:

- corrects the current time;

- sets the first measurement interval, which is used to measure and average some parameters that require an increased frequency of polling, for example, water content;

- sets the second measurement interval, which determines the recording interval of the values of the measured parameters in the memory unit 9, while the second interval is greater than the first interval;

- sets the interval for data transfer from the memory unit to the control room;

- the main telephone number of the control room is set;

- an additional telephone number is set for the operator programming and starting up the device.

After programming and turning off the personal computer, the device automatically performs a one-time control data transfer in the form of SMS messages to the primary and secondary telephone numbers and switches to low power mode. The control transmission allows you to evaluate the correct operation of the device by comparing the transmitted value, for example, pressure with the pressure gauge installed at the wellhead.

After the first measurement interval has elapsed, the device turns on, measures some parameters, averages their values, stores it in the microprocessor RAM and switches to low power consumption mode.

After the second measurement interval, the device measures the parameters and, together with the averaged parameters in the main memory, writes their values to the non-volatile memory unit 9 and switches to the low power consumption mode.

After the expiration of the data transmission interval, the microprocessor 7 turns on the radio modem 11, transmits a measurement page from the memory unit 9 and switches to the low power consumption mode. If the transmission did not take place due to a temporary lack of communication between the radio modem 11 and the local communication center, then the non-transmitted information will be transmitted the next time the radio modem is turned on. With a sharp change in the values of some parameters, for example, when emergency values of wellhead pressure are reached, an extraordinary transmission is carried out.

The vernier block allows you to measure parameter values on an enlarged scale, which provides increased measurement accuracy, for example, wellhead pressure or temperature.

The divider 15 coordinates the voltage of the autonomous power supply 13 with the allowable voltage at the input of the microprocessor 7, which allows you to control the voltage of the power supply and prevent it from falling below the permissible value.

Claims (3)

1. A device for monitoring the state of a working gas or oil well, comprising a controllable power supply unit, a microprocessor including analog-to-digital and digital-to-analog converters, wellhead parameter sensors, a switch for sensor signals, a non-volatile memory unit, and a radio modem, characterized in that it further comprises a nonius unit, one input of which is connected to the output of the switch, another input is connected to the output of the digital-to-analog converter, and the output is connected to the input of the second analog-to-digital converter When eating, the microprocessor is designed to provide, after programming and putting it into operation, a control one-time transmission of parameters in the form of an SMS message both by the main telephone number and by the additional number. 2. The device according to claim 1, characterized in that the microprocessor is designed to provide, in the event of a temporary lack of communication, the transmission of not transmitted data the next time the radio modem is turned on. 3. The device according to claim 1, characterized in that the microprocessor is designed to provide, upon reaching the value of any wellhead parameter of the emergency threshold, extraordinary data transmission by the main telephone number.

Images