CN117298659B - A pipe-in-pipe gas-liquid pre-separation device for treating oilfield gas-containing produced liquid - Google Patents
A pipe-in-pipe gas-liquid pre-separation device for treating oilfield gas-containing produced liquidInfo
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- CN117298659B CN117298659B CN202311109721.1A CN202311109721A CN117298659B CN 117298659 B CN117298659 B CN 117298659B CN 202311109721 A CN202311109721 A CN 202311109721A CN 117298659 B CN117298659 B CN 117298659B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0042—Degasification of liquids modifying the liquid flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/02—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/18—Cleaning-out devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G31/00—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
本发明涉及油气集输系统多相分离技术领域，公开一种处理油田含气采出液的管中管式气液预分离装置，主管第一端通过扩径管连接来液管线，第二端连接缩径管，主管顶部设有若干开孔以形成排气孔，且开孔段套接两端利用外部套管封闭以进行气液强制分离，缩径管、外部套管顶部出口、外部套管底部出口均通过带有调压阀的管路与分离缓冲罐连接；通过主管上扩径管、缩径管以及管中管段的设置，实现段塞流消除与缓冲预分离功能；其通过排气孔进行气相的初步分离，并将初步分离的气相、液相汇集输送到缓冲分离罐中进行收集、稳定、分离，结合扩径管、缩径管的特点提升整体的分离效果，缓冲并消除段塞流，避免段塞流的出现对设备稳定运行产生影响。
The present invention relates to the technical field of multiphase separation of oil and gas gathering and transportation systems, and discloses a pipe-in-pipe type gas-liquid pre-separation device for processing gas-containing produced liquid in an oil field, wherein the first end of the main pipe is connected to the liquid pipeline through an expanding pipe, and the second end is connected to the reducing pipe, and a plurality of openings are provided on the top of the main pipe to form exhaust holes, and the two ends of the opening section are sleeved and sealed with an external casing to perform forced separation of gas and liquid, and the reducing pipe, the top outlet of the external casing, and the bottom outlet of the external casing are all connected to a separation buffer tank through a pipeline with a pressure regulating valve; by arranging the expanding pipe, the reducing pipe and the pipe-in-pipe section on the main pipe, the slug flow elimination and buffer pre-separation functions are realized; the gas phase is initially separated through the exhaust hole, and the initially separated gas phase and liquid phase are collected and transported to a buffer separation tank for collection, stabilization and separation, and the overall separation effect is improved by combining the characteristics of the expanding pipe and the reducing pipe, buffering and eliminating slug flow, and avoiding the occurrence of slug flow affecting the stable operation of the equipment.
Description
Technical Field
The invention relates to the technical field of multiphase separation of oil and gas gathering and conveying systems, in particular to a pipe-in-pipe type gas-liquid pre-separation device for treating oilfield gas-containing produced liquid.
Background
Multiphase flow mixing technology is continuously developed with the development of ocean, land oil and gas fields and large condensate gas fields. The gas-liquid two phases can form various flow patterns such as layering, bubble shape, wave, annular fog, slugging and the like in the gathering and transportation pipeline, but long-distance transportation and pipeline turning shearing can generally generate slugging in the multiphase flow mixing and transportation process. During development of an oil and gas field, slugging may also occur due to well operation and maintenance. Serious slugging can cause a series of problems such as hydraulic impact, liquid level fluctuation, blockage and the like to oil-gas separation equipment at the tail end of a pipeline and subsequent process facilities, so that downstream process facilities are difficult to operate normally. Compared with other flow patterns, the slug flow has a great influence on the safe operation of downstream gas-liquid separation equipment.
Conventional separation techniques rely primarily on gravity settling and centrifugal separation. A three-phase separator is a typical separation device for separating gas and liquid by utilizing the gravity sedimentation principle. The device has the advantages of simple structure, convenient manufacture, large operation elasticity and the like, so that the device is widely applied in industry, and the technology is basically mature after decades of development. However, the gas-liquid separation in the container needs to have a longer residence time, so that the separator has the defects of large volume, high investment, large occupied area and the like.
In recent years, in order to reduce the cost and the floor space of the apparatus, many compact gas-liquid separation apparatuses have been developed. The application of the hydrocyclone separator (GLCC) is that the hydrocyclone separator is widely applied to realize gas-liquid two-phase fluid separation by utilizing the cyclone centrifugation principle. The gas-liquid two-phase fluid enters the columnar container through the tangential inlet with a downward inclination angle to generate a cyclone centrifugal effect, and the liquid phase is pushed to the container wall surface to flow out from the bottom liquid outlet. The gas phase is located in the center of the vessel and swirls upward out of the exhaust port at the top of the vessel. Compared with the traditional volumetric separator which realizes gas-liquid separation by gravity sedimentation, the volumetric separator has the advantages of simple and compact structure, small occupied area, lower safety cost and lower economic cost. However, the high-speed flowing gas phase obliquely enters the container downwards to impact the liquid phase interface in the container, and the downward flowing liquid film layer is torn when the gas phase is upwards swirled, so that serious entrainment results are caused, the separation efficiency of the separator is reduced, and the adaptive pressure and gas phase speed range is greatly limited for ensuring the separation efficiency.
Compared with the traditional separation technology, some existing pipe type liquid plug trapping devices generally adopt a declining pipe to perform gas-liquid separation on slugs in advance so as to better eliminate the slugs. However, this method has some limitations, such as limited length of downpipe, not suitable for handling longer plugs, and furthermore, in order to meet the requirement of downpipe, it is necessary to add an ascending pipeline at the inlet, which may have an adverse effect on plug handling.
Chinese patent CN205277395U discloses a submarine pipeline gas-liquid slug flow trapping and separating device, which uses pressure-bearing corrugated pipe, communicating ball valve, high-capacity shell to trap slug flow and orderly convey gas phase and liquid phase, and has large sedimentation space, compact association between parts, but huge equipment volume, precise parts, high cost and short service life.
Chinese patent CN111495040B discloses a horizontal pipeline type gas-liquid separation device and method, the device uses a cyclone device to swirl to separate gas and liquid, so as to form a liquid film-gas core two-phase flow, when the liquid film flows through the separation section, the liquid film is separated under the action of gravity, the device has simple structure, but the device cannot perform slug flow trapping and equipment operation adjustment, and is difficult to adapt to complex and variable working conditions.
In summary, aiming at the problems of expensive manufacturing cost, huge volume, poor adaptability, difficult site construction and the like of several common gas-liquid separation devices, it is necessary to invent a high-efficiency gas-liquid separation device which has compact structure, small occupied area, strong adaptability and capability of capturing slugs.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a pipe-in-pipe type gas-liquid pre-separation device for treating oilfield gas-containing produced liquid, which realizes the functions of slug elimination and buffer pre-separation through the arrangement of an expanding pipe, a reducing pipe and a pipe-in-pipe separation section on a main pipe, wherein the pipe-in-pipe separation section comprises an outer sleeve pipe and an inner perforated main pipe section, carries out preliminary separation of gas phase through an exhaust hole at the top of the inner main pipe, collects and conveys the preliminarily separated gas phase and liquid phase into a buffer separation tank for collection, stabilization and separation, combines the characteristics of the expanding pipe and the reducing pipe to promote the integral separation effect, buffers and eliminates slug flow, and avoids the influence of the occurrence of the slug flow on the field safety production and the stable operation of equipment.
In order to achieve the above object, the present invention is realized by the following technical scheme:
The utility model provides a pipe-in-pipe type gas-liquid preseparation device in processing oil field gas-bearing produced liquid, includes the person in charge, is responsible for first end and connects liquid pipeline through the hole enlargement pipe in order to change the interior flow type of person in charge into the layering flow, and the reducing pipe is connected to the second end, is responsible for the top and is equipped with a plurality of trompils in order to form the exhaust hole to the trompil section cup joints both ends confined outside sleeve pipe and carries out gas-liquid forced separation, reducing pipe, outside sleeve pipe top export, outside sleeve pipe bottom export all are connected with the separation buffer tank through the pipeline that has the air-vent valve.
As a further implementation manner, the main pipe is straight pipe.
As a further implementation mode, a first inlet is arranged at the middle position on the separation buffer tank, and a middle regulating valve is arranged on a pipeline between the first inlet and the reducing pipe.
As a further implementation mode, an outer sleeve top outlet is arranged at the top of the outer sleeve, a second inlet is arranged at the top position of the separation buffer tank, and an upper regulating valve is arranged on a pipeline between the outer sleeve top outlet and the second inlet.
As a further implementation mode, the main pipe is S-shaped, the open section of the main pipe is close to the second end, and the outlet at the top of the outer sleeve is arranged at the middle position of the outer sleeve at the last straight pipe section of the main pipe.
As a further implementation mode, an outer sleeve bottom outlet is arranged at the bottom of the outer sleeve, a third inlet is arranged on the separation buffer tank close to the bottom, and a lower regulating valve is arranged on a pipeline between the outer sleeve bottom outlet and the third inlet.
As a further implementation, the outlet at the bottom of the outer sleeve is arranged near the second end of the main pipe.
As a further implementation mode, a gas collecting bag is arranged at the top of one end, far away from the main pipe, of the separation buffer tank, a liquid phase outlet is arranged at the bottom of the separation buffer tank, and the gas collecting bag is connected with a gas phase outlet.
As a further implementation mode, a mist capturing net is arranged in the gas collecting bag.
As a further implementation mode, the perforated sections of the main pipe are all positioned in the outer sleeve, and the exhaust holes are formed in the top of the main pipe along the length direction of the main pipe.
The beneficial effects of the invention are as follows:
1. The first end of the main pipe is connected with the liquid pipeline through the expanding pipe, the second end of the main pipe is connected with the reducing pipe, the top of the main pipe is provided with a plurality of vent holes, the two ends of the vent hole are sleeved with the outer sleeve pipe which is in closed connection with the main pipe, a gas phase buffer space is formed between the main pipe and the sleeve pipe, gas-liquid forced separation is carried out through the vent holes at the top of the main pipe, the buffer space between the main pipe and the outer sleeve pipe can effectively reduce the gas speed, the gas phase discharged from the vent holes is collected, meanwhile, the aggregation and sedimentation of liquid drops carried in the gas phase are also facilitated, the gas phase at the top outlet of the outer sleeve pipe is prevented from carrying liquid, the expanding pipe enables the gas mass and the liquid mass in the liquid pipeline to be separated at a speed falling under the action of expansion separation, the flow pattern of a slug flow in the main pipe is converted into a stable laminar flow, and the reducing pipe is adopted at the outlet of the main pipe, the resistance in the main pipe when the gas flows out is increased, and the gas-liquid separation effect of the structure is improved.
2. The invention is provided with the expanding pipe, and the flow pattern in the liquid inlet pipeline is converted into stratified flow in the main pipe with large pipe diameter and long distance by using the method of changing the flow pattern by expanding the pipe diameter, so that the stratified flow is fully developed and stabilized, the stable flow state is ensured for collecting the separated gas for the external sleeve, and the gas-liquid separation efficiency is improved.
3. The invention adopts the regulating valve to regulate the pressure in the sleeve and the main pipe, so that on one hand, the pressure brought by the liquid level height in the separation buffer tank can be balanced, and the liquid level pressure can be prevented from making the liquid in the main pipe flow into the external sleeve in a large quantity, and on the other hand, the liquid drop carried by the gas phase in the external sleeve can be blocked, and the liquid can be prevented from entering the separation buffer tank through the outlet at the top of the external sleeve.
4. The main pipe of the invention is in a straight pipe shape or an S shape according to the field installation requirement, can be installed on the ground surface or underground, and saves the occupied area. The device has the advantages of simple and compact structure, no precise complex structure, low cost, good stability, high reliability, easy field construction and convenient operation and maintenance.
5. The invention gathers and separates the gas phase through the external sleeve after the full development section in the main pipe is stabilized, and then is collected, stabilized and separated by the buffer separating tank, and can be used for the front end of the traditional separator to perform slug elimination and buffer pre-separation, thereby improving the integral separating effect and ensuring the safe operation of the equipment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic diagram of the overall structure of a pipe-in-pipe buffer preseparation device in an embodiment of the present invention;
FIG. 2 is a schematic view of a pipe-in-pipe section structure according to an embodiment of the present invention;
FIG. 3 is a schematic flow diagram of a pipe-in-pipe section in an embodiment of the present invention.
In the drawings, the mutual spacing or size is exaggerated for showing the positions of the parts, and the schematic drawings are only schematic.
The device comprises a first inlet, a second inlet, a third inlet, a lower regulating valve, a 3-reducing pipe, a 4-external sleeve bottom outlet, a 5-external sleeve top outlet, a 6-external sleeve, a 7-liquid supply pipeline, an 8-expanding pipe, a 9-main pipe, a 10-upper regulating valve, a 11-middle regulating valve, a 12-first inlet, a 13-second inlet, a 14-separation buffer tank, a 15-gas phase outlet, a 16-gas collecting bag and a 17-liquid phase outlet.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Example 1
In an exemplary embodiment of the present invention, referring to fig. 1-3, a pipe-in-pipe gas-liquid pre-separation device for treating oilfield gas-containing produced liquid comprises a main pipe 9, wherein a first end of the main pipe 9 is connected with a liquid pipeline 7 through an expanding pipe 8 so as to convert the flow pattern of the main pipe 9 into a stratified flow, and a second end is connected with a reducing pipe 3 and is connected with a separation buffer tank 14 through the reducing pipe 3.
As shown in fig. 1, a plurality of exhaust holes are formed in the top of a main pipe 9, an open pore section is sleeved with an outer sleeve 6 with two ends in closed connection with the main pipe 9, the diameter of the outer sleeve 6 is larger than that of the main pipe 9, so that a gas phase buffer space is formed between the outer sleeve 6 and the main pipe 9, gas-liquid forced separation is carried out through the exhaust holes in the top of the main pipe 9 by utilizing the physical property differences of gas-liquid density, viscosity and the like, the buffer space between the main pipe and the outer sleeve can effectively reduce the gas speed, the gas phase exhausted by the exhaust holes is collected, meanwhile, the aggregation and sedimentation of liquid drops entrained in the gas phase are also facilitated, the gas phase carried liquid at an outlet 5 of the top of the outer sleeve is prevented, the main pipe 9 in the embodiment is in an S shape, the open pore section of the main pipe 9 is close to the second end of the main pipe 9, the open pore section of the main pipe 9 is located in the outer sleeve 6, and the exhaust holes are uniformly formed in the top of the main pipe 9 along the length direction of the main pipe 9.
In other examples, the exhaust holes are not uniformly arranged on the top of the main pipe 9, the sizes of the holes may be different, and the hole spacing may be set according to the specific situation.
It will be appreciated that the vent holes in the main pipe 9 are used to separate the gas phase within the main pipe. The design of the number of the top exhaust holes and the size of the exhaust holes of the main pipe 9 is influenced by factors such as physical properties, air content, flow and the like of fluid in a pipeline, the design can be specifically set according to the situation, and the part of the main pipe 9, which is close to the front end and is not provided with the external sleeve 6, is a full development section.
As shown in fig. 1, an outer sleeve 6 is provided with an outer sleeve top outlet 5 at a top middle position of the circumference side of the main pipe 9 of the last section of the straight pipe section of the main pipe 9, and the bottom of the outer sleeve 6, which is close to the second end of the main pipe, is provided with an outer sleeve bottom outlet 4.
The middle position of the separation buffer tank 14, which is close to one end of the main pipe, is provided with a first inlet 12, the top is provided with a second inlet 13, the bottom is provided with a third inlet 1, and the diameter reducing pipe 3, the top outlet 5 of the external sleeve and the bottom outlet 4 of the external sleeve are all connected with the separation buffer tank 14 through pipelines with pressure regulating valves.
Specifically, the first inlet 12 diameter-reducing pipe is connected through a pipeline, and a middle regulating valve 11 is arranged on the pipeline between the first inlet 12 and the diameter-reducing pipe. The top outlet of the outer sleeve is connected to the second inlet 13 by a pipe with an upper regulating valve 10. The outer sleeve bottom outlet 4 is connected to the third inlet 1 via a line with a lower regulating valve 2.
In this embodiment, the gas phase and the liquid phase in the liquid inlet pipeline 7 enter the main pipe 9 through the expanding pipe 8, and after the expansion and separation of the expanding pipe 8 and the buffering of the perforated main pipe 9, the flow speed is reduced, and a stable stratified flow is formed in the main pipe 9, so that the gas phase and the liquid phase are precipitated and separated.
An expanding pipe 8 is added at the inlet of the main pipe, so that air clusters and liquid clusters in the liquid inlet pipeline are separated at a reduced speed under the action of expansion separation, a slug flow pattern in the main pipe 9 is converted into a stable stratified flow, a reducing pipe 3 is adopted at the outlet of the primary main pipe, and the resistance of the main pipe 9 in the gas outflow process is increased, so that the gas-liquid separation effect of the structure is improved.
The gas phase and the liquid phase reach the main pipe 9 through the liquid inlet pipeline 7 and the expanding pipe 8, namely, the flow state in the main pipe can be changed into laminar flow by increasing the pipe diameter of the main pipe 9, the flow type in the liquid inlet pipeline 7 is changed into laminar flow in a full development section with large pipe diameter and long distance, the laminar flow can be fully developed and stabilized, the stable flow state is ensured for collecting and separating gas for the outer sleeve, and the gas-liquid separation efficiency is improved.
The lower regulating valve 2, the upper regulating valve 10 and the middle regulating valve 11 can realize pressure control on corresponding pipelines, so that the main pipe section and the separation buffer tank can be matched with each other at different mounting heights, wherein the pipeline between the outlet 4 at the bottom of the outer sleeve and the third inlet 1 is used for collecting liquid phase of gas phase sedimentation in the sleeve, and the lower regulating valve 2 is used for regulating the pressure in the pipeline. The pipeline between the reducing pipe 3 and the first inlet is used for separating liquid phase in the main pipe after separation, and the middle regulating valve 11 is used for regulating the pressure in the corresponding pipeline.
As shown in fig. 1, an outer sleeve top outlet 5 is arranged at the middle position of the top of the outer sleeve of the last section of the straight pipe section of the main pipe 9, so that gas phase collection in the outer sleeve is ensured to the greatest extent, and a pipeline between the outer sleeve top outlet 5 and the second inlet is used for passing separated gas phase. An upper regulator valve on the line is used to regulate pressure.
The pressure control is carried out on the device through the lower regulating valve 2, the upper regulating valve 10 and the middle regulating valve 11, so that a large amount of gas and liquid are prevented from entering the separation buffer tank 14 through the top outlet 5 of the outer sleeve, and the flow control in the device is realized. And in the layered flow process, the upper air layer is separated through the perforated section of the perforated main pipe 9, so that the stability and primary separation of the layered flow are realized.
The pressure that liquid level height brought in the separation buffer tank can be balanced to this embodiment adoption different governing valve governing sleeve pipe, be responsible for the internal pressure, prevents that liquid level pressure from making in the person in charge from surging into outside sleeve pipe a large amount, and on the other hand can block the liquid drop that carries in the gas phase of outside sleeve pipe, prevents that liquid from getting into the separation buffer tank through outside sleeve pipe top export.
The liquid fully develops in the main pipe 9 after entering the main pipe, and is collected and separated through the external sleeve after being stabilized through the fully developed section in the main pipe, and then is collected, stabilized and separated by the buffer separating tank, so that the liquid can be used for the front end of the traditional separator, and the slug elimination and the buffer pre-separation are carried out, the integral separation effect is improved, and the safe operation of equipment is ensured.
The main pipe 9 of the present embodiment is straight pipe or S-shaped, and can be installed on the ground or underground, thereby saving the floor space. The device has the advantages of simple and compact structure, no precise complex structure, low cost, good stability, high reliability, easy field construction and convenient operation and maintenance.
As shown in fig. 1, a gas collecting bag 16 is provided at the top of one end of the separation buffer tank 14 remote from the main pipe, the bottom is provided with a liquid phase outlet 17, and a gas collecting bag 16 is connected with a gas phase outlet 15. A mist-catching net is arranged in the gas-collecting bag 16 for catching liquid drops.
The third inlet 1, the first inlet 12 and the second inlet 13 of the separation buffer tank are used for respectively carrying out liquid phase sedimentation of gas phase in the sleeve after separation, the liquid phase in the main pipe 9 after separation and the gas phase in the sleeve are collected, sufficient sedimentation space of the separation buffer tank 14 is utilized for carrying out sedimentation separation, the separated gas is collected by the gas collecting bag 16 and is captured to enter a downstream gas phase pipeline through the gas phase outlet 15, and the liquid phase enters the downstream liquid phase pipeline through the liquid phase outlet 17 of the separation buffer tank 14, so that gas-liquid phase collection, stabilization and separation are realized.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
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| CN202311109721.1A CN117298659B (en) | 2023-08-30 | 2023-08-30 | A pipe-in-pipe gas-liquid pre-separation device for treating oilfield gas-containing produced liquid |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2762862Y (en) * | 2005-01-27 | 2006-03-08 | 上海交通大学 | Fast precooling gas/liquid separating casing |
| CN210145555U (en) * | 2019-04-04 | 2020-03-17 | 中国石油工程建设有限公司北京设计分公司 | A return-type assembled tubular slug flow buffer separation device |
| CN118745886A (en) * | 2024-07-15 | 2024-10-08 | 中海石油(中国)有限公司深圳分公司 | Pipeline oil, gas and water separation device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8894755B2 (en) * | 2008-09-24 | 2014-11-25 | Statoil Petroleum As | Gas-liquid separator |
| US8016920B2 (en) * | 2008-12-15 | 2011-09-13 | Chevron U.S.A. Inc. | System and method for slug control |
| CN104148196B (en) * | 2014-08-02 | 2016-06-08 | 中国石油大学(华东) | A kind of column gas-liquid cyclone separator entrance fairing |
| GB2561568A (en) * | 2017-04-18 | 2018-10-24 | Subsea 7 Norway As | Subsea processing of crude oil |
| CN112780250B (en) * | 2020-12-30 | 2022-05-27 | 东北石油大学 | Oil-gas-water three-phase multi-stage separation device in oil production well barrel |
| CN116241235B (en) * | 2022-12-13 | 2025-09-09 | 北京工商大学 | On-line metering device, method, equipment and medium for overflow control type oil well |
-
2023
- 2023-08-30 CN CN202311109721.1A patent/CN117298659B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2762862Y (en) * | 2005-01-27 | 2006-03-08 | 上海交通大学 | Fast precooling gas/liquid separating casing |
| CN210145555U (en) * | 2019-04-04 | 2020-03-17 | 中国石油工程建设有限公司北京设计分公司 | A return-type assembled tubular slug flow buffer separation device |
| CN118745886A (en) * | 2024-07-15 | 2024-10-08 | 中海石油(中国)有限公司深圳分公司 | Pipeline oil, gas and water separation device |
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| CN117298659A (en) | 2023-12-29 |
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