The method of operation of technological objects in the hydrocarbon gas

 

(57) Abstract:

The invention relates to a process for the preparation of hydrocarbon gases to the intake on the compressor station or gas station. The method includes the transportation of hydrocarbon gas pipeline, split it in the separator outlet fluid and the gas supply to the reception processing facility, to be sent to the consumer. When transporting hydrocarbon gas by pipeline control using the sensor for the amount of fluid flowing through the pipeline, and when you register appears in the gas flow volume of liquid in excess of the cumulative volume of the separator, give the signal to the gas supply processing facility, and the period of time from the moment of registration of appearance in the pipeline fluid to completely shut off flow of gas to the technological object is less than the period of time the passage of the fluid volume from the control number to the separator, and at lower liquid level in the separator to the given resume gas supply to the reception of the technological object. The technical solution of the invention is to provide trouble-free and reliable operation of the family gases to the intake on the compressor station (CS) or a gas distribution station (GDS) and can be used in the oil and gas industry.

The known method of transport gas, including commercial transportation of oil and gas eye-catching condensate total gas-liquid flow, the removal of condensate on the route of the pipeline through the condensate gathering tanks or ground separators-drip pans and the separation gas from the solids and the liquid droplet at the site of the COP. Condensate output in one of the points situated on the route of the pipeline in the area, as determined by the calculation formula (see ed.mon. N 1543180, CL F 17 D 1/00, publ. BI N 6, 1990). Common symptoms are known and the proposed method are:

- transportation of gas by pipeline;

- drain the pipeline;

- separation of the gas from the separator;

- gas supply to the intake of the compressor;

the direction of gas to the consumer.

The disadvantage of this method is that the problem trouble-free operation of the COP and GPP at the time of acceptance volley release is not fully solved. When large volumes of instantaneous emission fluid does not exclude the possibility of liquid into the suction line at the reception COP or GDS. When the volley emissions exceeding 40 m3that is, the cut-off suction line and sootvetstviis stop start and exit design mode is very long and time-consuming.

Closest to the proposed method to the technical essence and the achieved result is the method of transport gas, including commercial transportation total gas-liquid flow to the group setting for the first stage of separation. From the group of units separation of oil and gas are transported through separate pipelines. The gas after the first stage of separation is sent to the pipeline, and the oil passes the second stage separation. The second gas separation stage is fed to the COP and then in the pipeline (C. I. Bars. Extraction, preparation and transport of gas. M.: Nedra, 1975, c. 28-29).

Common symptoms are known and the proposed method are:

- transportation of gas by pipeline;

- separation of the gas from the separator;

- drain the pipeline;

- gas supply to the intake of the compressor;

the direction of gas to the consumer.

The disadvantage of this method is that when large volumes of liquid tubes the liquid enters at the intake of the compressor, resulting in the cutoff of the gas exhaust line and stop the COP. In addition, skorosti causes it to wear and decommissioning.

The technical objective is the protection of technological objects from liquid ingress traffic jams and ensure trouble-free operation of technological objects.

This object is achieved in that in the method of operation of the process facilities on hydrocarbon gas, including transportation of hydrocarbon gas pipeline, the gas separation in the separator outlet fluid and the flow of hydrocarbon gas to the reception processing facility with the subsequent direction of the prepared gas to the consumer during the transportation of hydrocarbon gas by pipeline control, for example, using the sensor, the amount of fluid flowing through the pipeline, and when you register appears in the gas flow volume of liquid in excess of the cumulative volume of the separator, give the signal to the gas supply technological object, during this period of time from the moment of registration of appearance in the pipeline fluid to completely shut off flow of gas to the technological object is less than the period of time the passage of the fluid volume from the control number to the separator, and at lower liquid level in the separator to a regime who is Le signal is received on the gas supply at COP compressor is transferred to the circulation flow of gas through the bypass circuit, moreover, after separation of part of the gas discharged to the flare.

The claimed combination of features allows you to provide safe and reliable operation of process objects without prolonged downtime for stopping and starting. The claimed combination of features allows you to reduce operational costs for repair and replacement of process equipment due to its depreciation and decommissioning as a result of strong shock liquid tube. In addition, the proposed method while passing the liquid tube through the gas separator of him dropping the torch within 1-2 hours.

The method of operation of technological objects in the hydrocarbon gas is implemented at facilities presented in schemes 1, 2, where Fig. 1 shows a flow chart of operation of the compressor station of Fig. 2 is a flow chart of operation of the gas plant.

Installing the exploitation of technological objects (Fig. 1, 2) contains the pipeline 1, installed on the pipeline sensor presence of liquid 2, the input separator 3, a technological object 4, the control system 5. The plant is equipped with shut-off and control valves 6, 7, 8.

The sensor 2 is connected to the system a pipeline exit of fluid from the separator 3 is shut-off and regulating valve 7. Inlet separator 3 is connected with the technological object 4. On the pipeline connecting the separator 3 with the technological object 4, is installed shut-off and regulating valve 8.

Installation manual gas distribution stations (Fig. 2) contains as a technological object - reducer 4.

The installation operation of the compressor station (Fig. 1) contains as a technological object, a compressor 4, which through the condenser 9 is connected to the separator 10. Pipeline gas outlet from the separator 10 is shut-off and regulating valve 11. At the pipeline exit of liquid from the separator 10 is shut-off and control valve 12. On the pipe connecting the pipe of gas outlet from the separator 10 with pipeline gas outlet from the separator 3, installed shut-off and regulating valve 13.

The device operates as follows. When in the pipeline 1 liquid tube, the volume exceeds the maximum sensor 2 transmits a signal to the control system 5, which gives a command for opening a gate valve 6 and valve 7, and the closing valve of the valve 8. Gas from the separator through the discharge valve 6 on the torch, and a liquid tube is given itae of accident-free operation. According to this scheme works GRES (Fig. 2). In the case of operation of the COP (Fig. 1) sensor signal 2 control system 5 gives the command to open valves valves 6 and 7 and to close valves valves 8 and 11. The compressor 4 starts to operate in the bypass circuit, namely, the gas from the compressor 4 is cooled in the refrigerator 9 and enters the separator 10, from which the liquid drains through the valve 12 and the gas through the valve 13 is supplied to the circulation in the compressor 4.

1. The method of operation of technological objects in the hydrocarbon gas, including transportation of hydrocarbon gas pipeline, the gas separation in the separator outlet fluid and the flow of hydrocarbon gas to the reception processing facility with the subsequent direction of the prepared gas to the consumer, characterized in that during transportation of hydrocarbon gas by pipeline control, for example, by using a sensor for the amount of fluid flowing through the pipeline, and when you register appears in the gas flow volume of liquid in excess of the cumulative volume of the separator, give the signal to the gas supply technological object, during this period of time from the moment of registration of appearance in pipes the passage of the fluid volume from the control number to the separator, and while lowering the liquid level in the separator to the given resume gas supply to the reception of the technological object.

2. The method of operation of technological objects, namely compressor stations (CS) under item 1, characterized in that after receiving the signal to the gas supply COP compressor is transferred to the circulation flow of gas through the bypass circuit.

 

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