阅读说明：本技术 一种节流放喷系统及使用方法 (Throttling open flow system and use method ) 是由 卜淘 张伟荣 张伟 严小勇 曾勉 胡涛 周移兴 郭小波 徐光华 陈程 王腾 范 于 2020-05-07 设计创作，主要内容包括：本发明涉及天然气采集和输送技术领域,特别涉及一种节流放喷系统及使用方法。包括用于与井口相连的输入管路,还包括节流管路和放喷管路,节流管路的入口和输入管路连接,节流管路的出口和集输管线连接,放喷管路的入口和输入管路连接,放喷管路的出口和放喷池连接；本发明使用三个阀门代替水套炉,设备体积和重量均大幅下降,减小了所需占地面积,降低了场地征用及地面建设工程成本；阀门操作简单、维护方便,便于集中管理,降低了设备维护成本；使用放喷方法无需点火操作,提高了集中管理的安全性；相比于水套炉及其配套设备,本发明能够节约大量人力物力,大幅降低生产成本。(The invention relates to the technical field of natural gas collection and transportation, in particular to a throttling open flow system and a using method thereof. The system comprises an input pipeline connected with a wellhead, a throttling pipeline and a blowout pipeline, wherein the inlet of the throttling pipeline is connected with the input pipeline, the outlet of the throttling pipeline is connected with a gathering pipeline, the inlet of the blowout pipeline is connected with the input pipeline, and the outlet of the blowout pipeline is connected with a blowout pool; the invention uses three valves to replace a water jacket furnace, the volume and the weight of the equipment are both greatly reduced, the required occupied area is reduced, and the site requisition and the ground construction engineering cost are reduced; the valve is simple to operate, convenient to maintain and convenient to centrally manage, and the maintenance cost of equipment is reduced; the open flow method is used without ignition operation, so that the safety of centralized management is improved; compared with a water jacket furnace and matched equipment thereof, the invention can save a large amount of manpower and material resources and greatly reduce the production cost.)

1. The utility model provides a throttle blowout system, is including being used for input pipeline (2) that link to each other with well head (1), its characterized in that, still includes throttle pipeline (3) and blowout pipeline (4), the entry of throttle pipeline (3) with input pipeline (2) are connected, the export and the gathering line connection of throttle pipeline (3), the entry of blowout pipeline (4) with input pipeline (2) are connected, the export and the blowout pond of blowout pipeline (4) are connected, be equipped with valve (31) and choke valve (32) along fluid flow direction on throttle pipeline (3) in proper order, valve (31) are used for opening or close throttle pipeline (3), be equipped with valve two (41) on blowout pipeline (4), valve two (41) are used for opening or close blowout pipeline (4).

2. A throttling blow-off system according to claim 1, characterized in that the first valve (31) and the second valve (41) are manual gate valves.

3. A throttle bleed system according to claim 1, characterised in that the throttle valve (32) is an angle valve.

4. A throttling blow-off system according to claim 3, characterized in that the throttle valve (32) is a needle angle valve.

5. A method for using the throttling blowing system, which is characterized by applying the throttling blowing system of any one of claims 1 to 4, and comprises the following steps:

A. when a well is opened, the second valve (41) on the open flow pipeline (2) is opened, then the first valve (31) on the throttling pipeline (3) is closed, and natural gas is conveyed along the open flow pipeline (4) and enters an open flow pool;

B. after the temperature of the natural gas rises to a conveying standard, the first valve (31) on the throttling pipeline (3) is opened, the throttling valve (32) is adjusted according to working conditions, then the second valve (41) on the blowout pipeline (4) is closed, the natural gas is conveyed along the throttling pipeline (3) and conveyed to the downstream through a gathering pipeline.

6. A throttle valve group pry, characterized by comprising at least 2 throttle blowout systems according to any one of claims 1-4, wherein an input pipeline (2) of each throttle blowout system is used for connecting a wellhead (1), a throttle pipeline (3) of each throttle blowout system is used for connecting a gathering pipeline, outlets of blowout pipelines (4) of all throttle blowout systems are converged into the same outlet pipeline (5), and the outlet pipeline (5) is used for connecting a blowout pool.

Technical Field

The invention relates to the technical field of natural gas collection and transportation, in particular to a throttling open flow system and a using method thereof.

Background

As shown in fig. 1, in the conventional single-well natural gas gathering and transportation process, a well needs to be opened and closed, and when the well is opened again after being closed for a period of time, hydrate blockage is easy to occur because the temperature of a well head 1 is low and the gas well cannot produce water immediately and is heated up; at the moment, a water jacket furnace is generally used for heating the natural gas produced by the wellhead 1 to the temperature required by the process, so that the formation of hydrates is prevented; however, the water jacket furnace and the corollary equipment thereof have large occupied area and high maintenance requirement, and need higher operation cost.

With the progress of drilling technology and the advance of shale gas exploitation, platform well technology is now commonly adopted for drilling production. Multiple wells are produced simultaneously in one platform, so that centralized management of all wells is required. In the production of the platform well, each well needs a whole set of water jacket furnace equipment, so that the problems of large floor area, complex structure and high maintenance requirement are more prominent than those of single well production, the production cost of the platform well is greatly increased, and the centralized management is not facilitated; and the water jacket furnace needs ignition operation, so that the safety risk of centralized management is increased.

Disclosure of Invention

The invention provides a throttling open flow system and a using method thereof, aiming at the technical defects of large occupied area, high maintenance cost and safety risk of the conventional water jacket furnace in the production of a platform well and matched equipment thereof. The invention has the advantages of small occupied area, simple operation, convenient maintenance, no need of ignition operation, convenient centralized management, capability of saving a large amount of manpower and material resources and great reduction of production cost.

In order to achieve the purpose, the invention provides the following technical scheme:

the throttling open flow system comprises an input pipeline connected with a wellhead, and is characterized by further comprising a throttling pipeline and an open flow pipeline, wherein an inlet of the throttling pipeline is connected with the input pipeline, an outlet of the throttling pipeline is connected with a collecting pipeline, an inlet of the open flow pipeline is connected with the input pipeline, an outlet of the open flow pipeline is connected with an open flow pool, a first valve and a throttling valve are sequentially arranged on the throttling pipeline along the flowing direction of fluid, the first valve is used for opening or closing the throttling pipeline, a second valve is arranged on the open flow pipeline and used for opening or closing the open flow pipeline.

According to the throttling open flow system provided by the invention, the three valves are used for replacing the water jacket furnace, the volume and the weight of the equipment are both greatly reduced, the required occupied area is reduced, and the site requisition and ground engineering construction cost are reduced; the valve is simple to operate, convenient to maintain and convenient to centrally manage, and the maintenance cost of equipment is reduced; the open flow method is used without ignition operation, so that the safety of centralized management is improved; in summary, compared with a water jacket furnace and corollary equipment thereof, the invention can save a large amount of manpower and material resources and greatly reduce the production cost.

Preferably, the first valve and the second valve are both manual gate valves. The manual gate valve is simple in structure, convenient to operate and easy to maintain, and can well meet the technical requirements of field operation.

Preferably, the throttle valve is an angle valve. Compare in the parallel choke valve of exit axis, the import axis and the export axis of angle valve are 90 contained angles, can assemble and form compacter pipeline structure, are convenient for integrate and the modularization, can further reduce equipment area, reduce the place and commander and build the cost.

Preferably, the throttle valve is a needle type angle valve. The needle valve core has stable flow coefficient curve and good throttling effect, is a common throttling valve in gas production operation, and can better meet the technical requirements of the invention.

The invention also provides a using method of the throttling open flow system, which applies the throttling open flow system and comprises the following steps:

A. after a well is opened, opening a second valve on the open flow pipeline, and then closing a first valve on the throttling pipeline, so that natural gas produced by a well mouth is conveyed along the open flow pipeline and enters an open flow pond;

B. after the temperature of the natural gas produced by the wellhead rises to a conveying standard, the first valve on the throttling pipeline is opened, the throttling valve is adjusted according to working conditions, then the second valve on the blowout pipeline is closed, the natural gas is conveyed along the throttling pipeline and conveyed to the downstream through a gathering pipeline.

By adopting the using method of the throttling open flow system, the open flow pipeline is opened and the throttling pipeline is closed after the well is opened, namely the open flow system is entered, so that the low-temperature natural gas produced by the well mouth is conveyed to the open flow pool through the open flow pipeline, and the low-temperature natural gas is discharged in the open flow mode, thereby avoiding hydrate blockage caused by low temperature; and after the water yield of the gas well rises and the temperature of the natural gas produced by the wellhead rises to the conveying standard, opening the throttling pipeline, closing the blowout pipeline, and enabling the natural gas produced by the wellhead to enter the gathering pipeline through the throttling pipeline, namely the gas transmission system.

The invention discharges low-temperature natural gas in a blowout mode, conveys the natural gas after the temperature of the wellhead natural gas rises, and does not need to heat the natural gas any more, thereby being capable of replacing a water jacket furnace in the production of a platform well with high water yield. Although the natural gas produced by the wellhead can be lost in a small amount, the natural gas can replace a water jacket furnace, so that the floor space cost and the equipment maintenance cost are greatly reduced, meanwhile, the safety is improved because the ignition operation is not needed, and comprehensively, a large amount of manpower and material resources can be saved, and the production cost is greatly reduced.

The throttling valve set pry comprises at least 2 throttling open flow systems, an input pipeline of each throttling open flow system is used for being connected with a well head, a throttling pipeline of each throttling open flow system is used for being connected with a gathering pipeline, outlets of open flow pipelines of all the throttling open flow systems are converged into the same outlet pipeline, and the outlet pipeline is used for being connected with an open flow pond.

In the production of the platform well, a plurality of production wells are arranged below one platform, and the problems of large occupied area and high maintenance cost of a plurality of corresponding water jacket furnaces are more prominent; a plurality of throttling open-flow systems are used for replacing the plurality of water jacket furnaces to form a throttling valve set pry, and all valves in the throttling valve set pry are arranged, operated and managed in a centralized manner in a smaller occupied area; a plurality of throttling open-flow systems on the throttling valve group pry share one open-flow pipeline; the invention has the advantages of reducing the occupied area and the maintenance cost.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. the throttle valve open flow system provided by the invention has the advantages that the three valves are used for replacing a water jacket furnace, the volume and the weight of equipment are greatly reduced, the required floor area is reduced, and the site utilization and construction cost is reduced; the valve is simple to operate, convenient to maintain and convenient to centrally manage, and the maintenance cost of equipment is reduced; ignition operation is not needed, and the safety of centralized management is improved. Compared with a water jacket furnace and matched equipment thereof, the invention can save a large amount of manpower and material resources and greatly reduce the production cost.

2. By adopting the using method of the throttling open flow system, the low-temperature natural gas produced by the wellhead is conveyed to the open flow pond through the open flow pipeline after the well is opened, and the low-temperature natural gas is discharged in the open flow mode, so that hydrate blockage caused by low temperature is avoided; and after the temperature of the natural gas rises to the conveying standard, inputting the natural gas produced by the wellhead into the gathering pipeline through the throttling pipeline, and enabling the natural gas to enter a gas conveying system. The invention discharges low-temperature natural gas in a blowout mode, and the natural gas is conveyed after the temperature of the wellhead natural gas is raised; although the natural gas produced by the wellhead is lost in a small amount, the natural gas does not need to be heated, so that a water jacket furnace can be replaced in the production of the platform well with high water yield, the floor occupation cost and the equipment maintenance cost are greatly reduced, and meanwhile, the safety is improved because ignition operation is not needed; in sum, the invention can save a large amount of manpower and material resources and greatly reduce the production cost.

3. The throttling valve group pry can simultaneously replace a plurality of water jacket furnaces, all valves on the throttling valve group pry are intensively arranged, intensively operated and intensively managed in a smaller occupied area, a plurality of throttling open-flow systems on the throttling valve group pry share one open-flow pipeline, a large amount of manpower and material resources are saved, and the occupied area and the maintenance cost are greatly reduced.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural view of a conventional water jacket furnace heating system.

Fig. 2 is a schematic structural diagram of a throttling blowout system of the invention.

FIG. 3 is a diagram of an operating system for a method of using a throttling blow-off system in accordance with the present invention.

Fig. 4 is a schematic structural view of a throttle valve pry of the invention.

Wherein the reference numerals are: 1-wellhead, 2-input pipeline, 3-throttling pipeline, 31-valve I, 32-throttling valve, 4-blowout pipeline, 41-valve II and 5-outlet pipeline.

Detailed Description

Example 1

As shown in fig. 2, the throttling open flow system comprises an input pipeline 2 connected with a wellhead 1, and is characterized by further comprising a throttling pipeline 3 and an open flow pipeline 4, wherein an inlet of the throttling pipeline 3 is connected with the input pipeline 2, an outlet of the throttling pipeline 3 is connected with a collecting pipeline, an inlet of the open flow pipeline 4 is connected with the input pipeline 2, an outlet of the open flow pipeline 4 is connected with an open flow tank, a first valve 31 and a throttle valve 32 are sequentially arranged on the throttling pipeline 3 in a fluid flow direction, the first valve 31 is used for opening or closing the throttling pipeline 3, a second valve 41 is arranged on the open flow pipeline 4, and the second valve 41 is used for opening or closing the open flow pipeline 4.

Wherein valve 31 and valve 32 can be gate valve or stop valve, are manual gate valve in this embodiment, and manual gate valve simple structure, convenient operation, easy maintenance can satisfy field operation's technical requirement betterly.

The throttle valve 32 is a needle-type angle valve, the included angle between the inlet axis and the outlet axis of the needle-type angle valve is 90 degrees, and the needle-type angle valve can be assembled to form a more compact pipeline structure, is convenient for integration and modularization, further reduces the floor area of equipment, and reduces the site utilization and construction cost; the needle valve core has stable flow coefficient curve and good throttling effect, is a common throttling valve in gas production operation, and can better meet the technical requirements of the invention.

According to the throttling and blowing system provided by the invention, the two manual gate valves and the needle-shaped angle valve are used for replacing a water jacket furnace, so that the volume and the weight of the equipment are greatly reduced, the required floor area is reduced, and the site utilization and construction cost is reduced; the manual gate valve and the throttle valve are simple to operate and convenient to maintain, centralized management is facilitated, and the equipment maintenance cost is reduced; the open flow method is used without ignition operation, so that the safety of centralized management is improved; in summary, compared with a water jacket furnace and corollary equipment thereof, the invention can save a large amount of manpower and material resources and greatly reduce the production cost.

Example 2

As shown in FIG. 3, the use method of the throttling open-flow system comprises the following steps:

A. after the well is opened, firstly opening a second valve 41 on the blowout pipeline 4, and then closing a first valve 31 on the throttling pipeline 3, so that the natural gas produced by the well mouth 1 is conveyed along the blowout pipeline 4 and enters a blowout pool;

B. after the temperature of the natural gas produced by the wellhead 1 rises to more than 50 ℃, the first valve 31 on the throttling pipeline 3 is opened, the throttling valve 32 is adjusted according to the working condition, then the second valve 41 on the blowout pipeline 4 is closed, the natural gas is conveyed along the throttling pipeline 3 and conveyed to the downstream through a gathering pipeline.

By adopting the using method of the throttling open flow system, after a well is opened, the open flow pipeline 4 is opened, the throttling pipeline 3 is closed, and then the well enters the open flow system, so that the low-temperature natural gas produced by the well mouth 1 is conveyed to an open flow pond through the open flow pipeline 4, and the low-temperature natural gas is discharged in the open flow mode, thereby avoiding hydrate blockage caused by low temperature; and after the water yield of the gas well rises and the temperature of the natural gas produced by the wellhead 1 rises to a conveying standard, opening the throttling pipeline 3, and closing the blowout pipeline 4 to enable the natural gas produced by the wellhead 1 to enter the gathering pipeline through the throttling pipeline 3, namely, enter the gas conveying system.

The invention discharges low-temperature natural gas in a blowout mode, and conveys the natural gas after the temperature of the wellhead 1 rises, so that the natural gas does not need to be heated, and the water jacket furnace can be replaced in the production of the platform well with high water yield. Although the natural gas produced by the wellhead 1 can be lost in a small amount, the invention can replace a water jacket furnace, thereby greatly reducing the floor space cost and the equipment maintenance cost, and simultaneously improving the safety because of no need of ignition operation.

Example 3

As shown in fig. 4, a throttle valve set pry comprises six throttle blowout systems, wherein first valves 31, throttle valves 32 and second valves 41 on all the throttle blowout systems are intensively arranged in a small floor area, all the first valves 31 and the second valves 41 are manual gate valves, all the throttle valves 32 are needle-type angle valves, and outlets of all the blowout pipelines 4 are converged into the same outlet pipeline 5 and connected with a blowout pool.

In the production of the platform well, a plurality of production wells are arranged below one platform, and the problems of large occupied area and high maintenance cost of a plurality of corresponding water jacket furnaces are more prominent; a plurality of throttling open-flow systems are used for replacing the plurality of water jacket furnaces to form a throttling valve set pry, and all valves in the throttling valve set pry are arranged in a centralized mode, operated in a centralized mode and managed in a centralized mode; a plurality of throttling open-flow systems on the throttling valve group pry share one open-flow pipeline; the invention has the advantages of reducing the occupied area and the maintenance cost.

All of the features disclosed above, or all of the steps in any method or process disclosed, may be combined in any combination, except features and/or steps that are mutually exclusive.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.