CN201672252U - Gas gathering station emptying natural gas injection recovery device - Google Patents

Abstract

A gas gathering station emptying natural gas jet recovery device is applied to exploitation and recovery of natural gas fields to empty natural gas of low-pressure gas wells. The low-pressure gas well and the high-pressure gas well are connected with plug valves through pipelines, the plug valves are connected with throttle valves through pipelines, and the throttle valves are connected with throttle needle valves through pipelines; a throttle needle valve connected with the low-pressure gas well is connected with a throttle needle valve connected with the high-pressure gas well in parallel and is connected with an inlet of a separator through a pipeline, and an outlet of the separator is connected with a natural gas gathering and transportation pipeline; a pipeline between a throttle valve and a throttle needle valve of the high-pressure gas well is provided with a high-pressure gas inlet of which the pipeline is connected with a jet drainage device; the plug valve connected with the low-pressure gas well is connected with a low-pressure suction inlet of the jet drainage device through a pipeline; the outlet of the jet diversion apparatus is piped to the separator inlet line. The effect is as follows: the gas collecting station is used for recovering the emptying natural gas of the gas collecting station without the help of external energy, so that the emptying natural gas in the gas collecting station is recovered.

Description

Gas Gathering Station Vented Natural Gas Jet Recovery Device

technical field

The utility model relates to the technical field of gas field exploitation, in particular to a gas-gathering station, which uses the energy of a high-pressure gas well in the gas-gathering station to realize the recovery of natural gas that needs to be vented from other compressed gas wells.

Background technique

At present, in the process of gas field development, due to the needs of station maintenance, equipment maintenance and replacement, and gas well hydrate removal, natural gas venting is inevitable. Although the vented natural gas has been ignited, the pollution to the environment has been minimized. Resources are underutilized. The natural gas that needs to be vented in the rest of the compressor wells is recovered by jetting, that is, the high-pressure gas wells in the station are used to quickly reduce the pressure of the pipeline to be vented, and more than 70% of the vented natural gas is recovered.

Utility model content

The purpose of this utility model is: to provide a gas-gathering station vented natural gas injection recovery device, which is used to recover the gas-gathering station vented natural gas, and realizes the recovery of vented natural gas in the gas-gathering station by adopting a jet recovery process without external energy. Utilize the energy of the high-pressure gas well in the station to recover the natural gas to be vented.

The technical scheme adopted by the utility model is: the gas-gathering station venting natural gas injection recovery device is mainly composed of a cock valve, a throttle valve, a throttle needle valve, a jet drainage device, a separator and a pipeline. The low-pressure gas well is connected to the plug valve through the pipeline, the plug valve is connected to the throttle valve through the pipeline, and the throttle valve is connected to the throttle needle valve through the pipeline; the high-pressure gas well is connected to the plug valve through the pipeline, the plug valve is connected to the throttle valve through the pipeline, and the throttle valve is connected to the throttle valve through the pipeline The throttle needle valve is connected; the throttle needle valve connected to the low-pressure gas well is connected in parallel with the throttle needle valve connected to the high-pressure gas well and is connected to the inlet of the separator through a pipeline, and the outlet of the separator is connected to the natural gas gathering pipeline. It is characterized in that: on the pipeline between the throttle valve of the high-pressure gas well and the throttle needle valve, there is a pipeline connected to the high-pressure gas inlet of the jet drainage device; the cock valve connected to the low-pressure gas well is connected to the low-pressure suction port of the jet drainage device through the pipeline; The outlet of the jet drainage device is connected to the inlet pipeline of the separator by pipeline.

Briefly describe the operation process of the vented natural gas injection recovery device in the gas gathering station: refer to Figure 1. When a low-pressure gas well needs to be vented, first close the throttle needle valve 3 of the high-pressure gas well, and the high-pressure gas enters the high-pressure inlet of the jet drainage device 5, and at the same time open the plug valve 1 of the low-pressure gas well to be vented, and close the low-pressure gas well to be vented. The throttle valve 2 of the gas well; the natural gas to be vented enters the low-pressure inlet of the jet drainage device 5, and the natural gas mixed with the jet drainage device 5 enters the separator 4, and is transported outside after gas-liquid separation, so as to quickly reduce the pipeline pressure of the low-pressure gas well to be vented , can recover the natural gas in the pipeline. During normal gas production, the jet drainage device 5 is not activated.

Beneficial effects of the utility model: the utility model gas gathering station venting natural gas injection recovery device, applied to gas field production, has the following advantages: when the low-pressure gas well needs to be vented, it can quickly reduce the pipeline pressure of the low-pressure gas well to be vented, thereby recovering The natural gas in the pipeline to be vented does not need external energy, and the energy of the high-pressure gas well in the gas gathering station is fully utilized. Save primary energy and protect the environment. The whole operation is safe, simple and convenient.

Description of drawings

Figure 1 is a schematic diagram of a gas gathering station vented natural gas injection recovery device.

Among the figure, 1. plug valve, 2. throttle valve, 3. throttle needle valve, 4. separator, 5. jet drainage device.

Detailed ways

Embodiment 1: Taking a gas-gathering station vented natural gas injection recovery device as an example, the utility model is further described in detail.

See Figure 1. The utility model gas-gathering station venting natural gas injection recovery device is mainly composed of a cock valve 1, a throttle valve 2, a throttle needle valve 3, a jet drainage device 5, a separator 4 and pipelines.

There are four low-pressure gas wells, and each low-pressure gas well is connected to the plug valve 1 through the pipeline, the plug valve 1 is connected to the throttle valve 2 through the pipeline, and the throttle valve 2 is connected to the throttle needle valve 3 through the pipeline;

There is a high-pressure gas well, the high-pressure gas well is connected to the plug valve 1 through the pipeline, the plug valve 1 is connected to the throttle valve 2 through the pipeline, and the throttle valve 2 is connected to the throttle needle valve 3 through the pipeline;

The throttle needle valves 3 connected to the four low-pressure gas wells are connected in parallel with the throttle needle valves 3 connected to the high-pressure gas wells and connected to the inlet of the separator 4 through pipelines, and the outlet of the separator 4 is connected to the natural gas gathering pipeline.

A pipeline is connected to the pipeline between the throttle valve 2 of the high-pressure gas well and the throttle needle valve 3, and this pipeline is connected to the high-pressure gas inlet of the jet drainage device 5; the plug valve 1 connected to the low-pressure gas well is connected to the jet drainage device through a pipeline The low-pressure suction port of 5; the outlet of jet drainage device 5 has pipeline to be connected on separator 4 inlet pipelines.

Claims (1)

1. gas gathering station emptying natural gas injection recovering device, mainly form by stopcock (1), throttle valve (2), Throttle needle valve (3), injection drainage system (5), separator (4) and pipeline, low-pressure gas well connects stopcock (1) by pipeline, stopcock (1) connects throttle valve (2) by pipeline, and throttle valve (2) connects Throttle needle valve (3) by pipeline; High-pressure gas well connects stopcock (1) by pipeline, and stopcock (1) connects throttle valve (2) by pipeline, and throttle valve (2) connects Throttle needle valve (3) by pipeline; Throttle needle valve (3) parallel connection that the Throttle needle valve (3) that low-pressure gas well connects is connected with high-pressure gas well and be connected the outlet connection gas gathering pipeline of separator (4) by the inlet of pipeline with separator (4); It is characterized in that: the high pressure air inlet that on the pipeline between the throttle valve (2) of high-pressure gas well and the Throttle needle valve (3), has pipeline to be connected to spray drainage system (5); The stopcock (1) that low-pressure gas well connects connects the low pressure suction port that sprays drainage system (5) by pipeline; The outlet of spraying drainage system (5) has pipeline to be connected on separator (4) suction line.

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