WO2014194529A1 - 一种新型气流降压装置及气流降压方法 - Google Patents
一种新型气流降压装置及气流降压方法 Download PDFInfo
- Publication number
- WO2014194529A1 WO2014194529A1 PCT/CN2013/077001 CN2013077001W WO2014194529A1 WO 2014194529 A1 WO2014194529 A1 WO 2014194529A1 CN 2013077001 W CN2013077001 W CN 2013077001W WO 2014194529 A1 WO2014194529 A1 WO 2014194529A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- section
- pressure
- reducing device
- natural gas
- pressure reducing
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/02—Influencing flow of fluids in pipes or conduits
Definitions
- the invention belongs to the field of oil and gas field and natural gas exploitation, and particularly relates to a novel air flow pressure reducing device and a gas flow pressure reducing method for reducing the internal pressure of a natural gas pipeline. Background technique
- the prior art measures to prevent natural gas from forming hydrates include three methods of increasing the temperature of natural gas before entering the throttle valve, adding hydrate inhibitors, and adopting a downhole throttling process.
- the water in the natural gas is dissolved in the inhibitor, and by changing the interaction between the water molecules, the partial pressure of the water vapor is lowered, the equilibrium temperature of the hydrate formation is lowered or the equilibrium pressure is increased, and the formation of the hydrate is prevented, which is also currently Common methods, but the addition of inhibitors requires specialized injection equipment, low reliability, high consumption of inhibitors, and high cost.
- the throttle In the downhole throttling process, the throttle is installed in the proper position of the natural gas well tubing to achieve throttling and depressurization, and the natural gas after throttling is heated by the ground temperature to increase the natural gas temperature and prevent hydrate formation.
- the downhole throttling process has been promoted for more than 20 years, it is currently used in medium and shallow gas wells, but it has not been applied in deep gas wells, and there are risks such as throttle failure and salvage failure in the downhole throttling process.
- the placement and salvage of the downhole throttle are complicated, the cycle is long, and the maintenance cost is high. Summary of the invention
- the invention provides a novel airflow depressurization device and a gas flow depressurization method, which solves the prior art to prevent the formation of hydrate in a natural gas pipeline by increasing the natural gas temperature, adding an inhibitor and adopting a downhole throttling process, and the cost is high, and the construction process is repeated. Miscellaneous, technical problems with limited application.
- the technical solution adopted by the present invention is:
- a novel airflow pressure reducing device comprising: an inlet section, a supersonic nozzle connected to the inlet section, a pressure temperature recovery section, a connecting section connecting the supersonic nozzle and a pressure temperature recovery section,
- the pressure temperature recovery section includes an inlet section, a straight section and a sub-expansion section, and the sub-expansion section is connected with an outlet section.
- the throat of the supersonic nozzle has a diameter D1
- the outlet diameter of the supersonic nozzle is D2, KD2 / D1
- the connecting section has a diameter of D3, a length of L1, D3>D2, and L1>D2.
- the inlet section has a diameter D4 and a length L2
- the straight pipe section has a diameter D5 and a length of L3
- the outlet section has a diameter of D6 and a length of L5.
- the inner surface of the novel airflow pressure reducing device is made of SIC ceramic or cemented carbide.
- An airflow depressurization method using a novel airflow pressure reducing device comprising:
- Natural gas enters the supersonic nozzle from the inlet section of the new airflow pressure reducing device, and the gas gas speed increases, and the pressure and temperature decrease;
- the two new airflow pressure reducing devices are used in series to significantly reduce the pressure of the natural gas.
- connection of a throttle valve to the new airflow pressure reducing device can also significantly reduce the pressure of the natural gas.
- the superior effect of the novel airflow pressure reducing device and the airflow pressure reducing method of the present invention is that the natural gas is increased in the supersonic nozzle of the novel airflow pressure reducing device to achieve supersonic speed, temperature and pressure are lowered, and the pressure temperature recovery section is for natural gas. Compression, the temperature of the natural gas rises, the pressure rises to the set value, the pressure of the natural gas in the pipeline is much lower than the pressure before entering the new airflow pressure reducing device, and the temperature of the natural gas is reduced to a small extent, effectively preventing the natural gas pipeline.
- the hydrate formation is formed downstream, and the novel airflow pressure reducing device of the invention has the advantages of simple installation operation, low operation and maintenance cost, and simple and convenient maintenance.
- FIG. 1 is a schematic cross-sectional view of the novel airflow pressure reducing device of the present invention. detailed description
- the new airflow pressure reducing device 10 is composed of an inlet section 1, a supersonic nozzle 2, a connecting section 3, a pressure temperature recovery section 4 and an outlet section 5, wherein the pressure temperature recovery section 4 includes an inlet section. 6, straight pipe section 7 and sub-expansion section 8.
- the natural gas increases in the supersonic nozzle 2 of the new airflow pressure reducing device 10, and the speed reaches the supersonic speed, so the pressure and temperature of the natural gas flow rapidly decrease, and then the natural gas is pressed in the pressure temperature recovery section 4.
- the pressure of the natural gas rises to the designed pressure value.
- the velocity, pressure and temperature of the gas flow do not reach the hydrate formation conditions, thus effectively preventing the formation of hydrates in the natural gas pipeline.
- the flow rate of natural gas is 10000m 3 /day, the incoming pressure of natural gas is 15Mpa, the temperature of natural gas is 293K, and the specific heat ratio is 1.3.
- the pressure drop of natural gas after passing through the new airflow pressure reducing device 10 is 3Mpa. Natural gas enters the separator for separation.
- the throat diameter D1 of the supersonic nozzle 2 of the novel airflow pressure reducing device 10 is designed to be 4 ⁇ 8 mm.
- the Mach number of the supersonic nozzle 2 of the novel airflow pressure reducing device 10 is designed to be 1.5 to 4. It is determined that the diameter of the inlet section 1 of the supersonic nozzle 2 is the same as the diameter of the natural gas pipeline, and the outlet diameter D2 of the supersonic nozzle 2 is determined to be 7 to 13 mm according to the designed Mach number.
- D5 is 10 ⁇ 60mm
- D6 (2-3)
- X D4 to calculate the diameter D6 of the sub-expansion section 8 is 10 ⁇ 180mm
- L3/D5 10 to calculate the length L3 of the straight pipe section 7 is 30 ⁇ 600mm
- L4 (3-6)
- X (D6-D5) to calculate the length L4 of the sub-expansion section 8 is 300 ⁇ 600mm.
- the inner surface of the novel airflow pressure reducing device 10 is made of a high erosion resistant material.
- a high erosion resistant material such as ceramics, hard alloys, or the use of surfacing or spraying a layer of high erosion resistant materials to reduce costs.
- An airflow depressurization method using a novel airflow pressure reducing device comprising the steps of:
- Natural gas enters the supersonic nozzle from the inlet section of the new airflow pressure reducing device, and the gas gas speed increases, and the pressure and temperature decrease;
- the natural gas after the pressure and temperature are lowered enters the pressure temperature recovery section from the supersonic nozzle, the temperature rises, and the pressure rises to the set value.
- the two new airflow pressure reducing devices are used in series to significantly reduce the pressure of the natural gas.
- the connection of a throttle valve to the new airflow pressure reducing device can also significantly reduce the pressure of the natural gas.
- the new airflow pressure reducing device 10 can be installed as a valve member between the pipe and the valve.
- the well site When the well site is modified, it can be installed as follows: First shut down the natural gas The flow valve is cut on the natural gas pipeline with a pipe of the same length as the new airflow pressure reducing device 10. The new airflow pressure reducing device 10 is flanged to the natural gas pipeline, the natural gas valve is opened, and the new airflow pressure reducing device 10 works normally. The pressure drops to 3 MPa for the design and the temperature is about 290K.
- the natural gas flow rate is 10000 m 3 /day, the natural gas incoming pressure is 35 Mpa, the temperature is 303 K, and the specific heat ratio is 1.3.
- the natural gas is required to pass through the new airflow pressure reducing device 10 and the pressure is reduced to 2.5 MPa, and then enters the separator for separation.
- the first stage pressure drop adopts a new airflow pressure reducing device 10, and the pressure drop is 1/5 of the total flow pressure, that is, the pressure drops to 7 MPa.
- the airflow parameter after the first stage new airflow pressure reducing device that is, the pressure is 7 MPa, flow rate 10000 m 3 /day, temperature about 303K, specific heat ratio 1.3, design of the second-stage new airflow pressure reducing device.
- the supersonic nozzle throat diameter D1 is 9 ⁇ 15mm.
- the ultrasonic spout outlet diameter D2 is 15 ⁇ 20mm.
- D6 (2-3)
- X D4 is used to calculate the diameter D6 of the sub-expansion section 8 is 36 ⁇ 240mm.
- the length L2 of the inlet section 6 is calculated as 40 ⁇ 80 mm, according to 3 L3/D5 10
- a length of about 500 mm pipe is used to form an integral pressure reducing device by flange connection, and the installation sequence of the two-stage new airflow pressure reducing device 10 cannot be reversed.
- the new airflow pressure reducing device 10 can be installed as a valve member between the pipe and the valve.
- the well site can be installed as follows: First shut down The natural gas incoming flow valve intercepts a pipe of the same length as the new airflow pressure reducing device 10 on the natural gas pipeline, and connects the new airflow pressure reducing device 10 to the natural gas pipeline through the flange, opens the natural gas valve, and the new airflow pressure reducing device 10 is normal. At work, the pressure drops to 2.5 MPa for the design and the natural gas temperature is about 300K.
- the natural gas flow rate is IX 10000 m 3 /day
- the natural gas incoming pressure is 14Mpa
- the temperature is 293K
- the specific heat ratio is 1.3
- the pressure of natural gas after passing through the new airflow pressure reducing device 10 is 2.5MPa.
- the combined valve structure is composed of a throttle valve and a new airflow pressure reducing device 10.
- the throttle valve can be a needle valve, and the throttle valve is connected with a pipe diameter of the same diameter as the natural gas pipe and about 2 to 15 times longer.
- the section, the transition section is connected to the new airflow pressure reducing device 10.
- the combined valve is flanged to the natural gas pipeline.
- the combined valve outlet pressure is 2.5MPa and the temperature is 290K.
- the novel airflow pressure reducing device 10 has simple structure, wide airflow pressure adjustment range, simple installation operation, low operation and maintenance cost, and simple and convenient maintenance.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
一种气流降压装置(10)及气流降压方法,降压装置(10)包括进口段(1)、与进口段(1)连接的超声速喷管(2)、压力温度恢复段(4)、连接超声速喷管(2)和压力温度恢复段(4)的连接段(3),压力温度恢复段(4)包括入口段(6)、直管段(7)和亚扩段(8),亚扩段(8)连接有出口段(5)。气流降压方法为:天然气在降压装置(10)的超声速喷管(2)中速度增加,达到超音速,温度和压力降低,而压力温度恢复段(4)对天然气进行压缩,天然气的温度升高。降压装置(10)结构简单,气流压力调节范围广,气流流量大,安装操作简单,运行维护费用低,有效防止天然气下游管道内形成水合物。
Description
一种新型气流降压装置及气流降压方法 技术领域
本发明属于油气田、 天然气开采领域, 特别涉及一种降低天然气管道内部压力的新型气 流降压装置及气流降压方法。 背景技术
众所周知, 在天然气井场采气工艺流程中, 天然气从气井中采出, 需要进行节流降压, 使压力达到系统设定值后, 进入分离工艺流程, 在分离器中去除液体和固体杂质, 经计量装 置计量后进入集气支线输出。 天然气流经节流阀时, 气体的压力降低, 体积膨胀, 温度急剧 下降, 有可能使天然气温度达到天然气水露点温度以下, 在节流阀和下游管道中形成水合物, 从而影响生产, 甚至出现危险。在天然气输送管道和配气门站工艺流程中, 也需要节流降压, 也存在形成水合物的危险。
现有技术防止天然气形成水合物的措施, 主要包括提高进入节流阀前的天然气温度、 加 入水合物抑制剂和采用井下节流工艺三种方法。
提高天然气温度, 一般在节流阀前采用水套炉等设备对天然气加热, 或者铺设平行于输 气管线的伴热管线, 使天然气温度在进入节流阀后, 仍处于天然气的水露点以上, 有效防止 天然气水合物的形成。 这是目前普遍采用的方法, 这种方法需要消耗大量天然气, 既不经济, 也不环保。
加入抑制剂, 天然气中的水溶于抑制剂, 通过改变水分子间的相互作用, 从而使水汽的 分压降低, 引起生成水合物的平衡温度降低或平衡压力提高, 防止水合物形成, 这也是目前 常用方法, 但加入抑制剂需要专门的注入装置, 可靠性较低、 消耗抑制剂、 费用高。
井下节流工艺, 将节流器安装在天然气井油管的井下适当位置, 实现节流降压, 并利用 地温加热经过节流后的天然气, 提高天然气温度, 防止水合物形成。 虽然井下节流工艺经过 二十多年的研究推广, 目前在中浅层气井得到应用, 但是在深层气井中, 没有得到应用, 而 且井下节流工艺存在节流器失效, 打捞失效等风险, 同时, 投放、 打捞井下节流器施工复杂, 周期长, 使用维护费用高。 发明内容
本发明提供一种新型气流降压装置及气流降压方法, 以解决现有技术通过提高天然气温 度, 加入抑制剂和采用井下节流工艺防止天然气管道中形成水合物, 成本较高, 施工工艺复
杂、 应用受到限制的技术问题。
为了解决以上技术问题, 本发明采取的技术方案是:
一种新型气流降压装置, 所述新型气流降压装置包括进口段、 与进口段连接的超声速喷 管、 压力温度恢复段、 连接所述超声速喷管和压力温度恢复段的连接段, 所述压力温度恢复 段包括入口段、 直管段和亚扩段, 所述亚扩段连接有出口段。
优选为,所述超声速喷管的喉道直径为 Dl,所述超声速喷管的出口直径为 D2, KD2 /D1
<4。
优选为, 所述连接段的直径为 D3, 长度为 Ll, D3〉D2, L1〉D2。
优选为, 所述入口段的直径为 D4, 长度为 L2, 所述直管段的直径为 D5, 长度为 L3, 所述亚扩段直径为 D6, 长度为 L4, 1.5=¾D4/D2^3, 2X (D4-D5) L2 25 X (D4-D5 ) , D5/D1 ^ 1 , D5/ D2 3, 3 L3/ D5 30, 2X (D6 -D5) ^L4^25 X (D6 -D5) 。
优选为, 所述新型气流降压装置的内表面采用 SIC陶瓷、 硬质合金材质。
以上所述进口段、 超声速喷管、 压力温度恢复段的长度与直径的具体数值是申请人经过 多年的实验研究得出的结果。
一种使用新型气流降压装置的气流降压方法, 所述方法包括:
( 1 )天然气气体从新型气流降压装置的进口段进入超声速喷管中, 天然气气体的速度增 加, 压力和温度降低;
(2)压力和温度降低后的天然气从超声速喷管中进入压力温度恢复段, 温度升高, 压力 升高到设定值。
优选为, 将两个新型气流降压装置串联使用, 能够显著降低天然气的压力。
优选为, 在新型气流降压装置上连接一个节流阀, 同样能够显著降低天然气的压力。 本发明的新型气流降压装置及气流降压方法的优越效果在于, 天然气在新型气流降压装 置的超声速喷管中速度增加, 达到超音速, 温度和压力降低, 而压力温度恢复段对天然气进 行压縮, 天然气的温度升高, 压力升高到设定值, 管道内天然气的压力比进入新型气流降压 装置之前的压力大为降低, 同时天然气的温度降低的幅度小, 有效防止天然气管道的下游形 成水合物, 本发明的新型气流降压装置具有安装操作简单, 运行维护费用低, 维修简单方便 的优点。 附图说明
图 1为本发明所述新型气流降压装置的剖视示意图。
具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发明实施例中的附 图, 对本发明实施例中的技术方案进行清楚、 完整地描述。
如图 1所示, 所述新型气流降压装置 10由进口段 1、 超声速喷管 2、 连接段 3、 压力温 度恢复段 4和出口段 5依次连接构成, 其中压力温度恢复段 4包括入口段 6, 直管段 7和亚 扩段 8。 超声速喷管 2的喉道直径为 Dl, 出口直径为 D2, KD2/DK4, 连接管 3的直径为 D3, 长度为 Ll, 并且 D3〉D2, L1 >D2; 入口段 6的直径为 D4, 长度为 L2; 直管段 7的直 径为 D5, 长度为 L3; 亚扩段 8的直径为 D6, 长度为 L4, 并且 1.5 D4/D2 3, 2X (D4-D5) ^L2^25 X (D4-D5) , D5/D1 ^ 1 , D5/D2 3, 3=¾L3/D5=¾30, 2X (D6 -D5) ^L4^25 X (D6 -D5 ) , 出口段 5的直径为 D6, 长度为 L5, 0^L5/ D6^5, 天然气在新型气流降压装 置 10的超声速喷管 2内速度增加,速度达到超声速,因此天然气气流的压力和温度迅速降低, 随后天然气在压力温度恢复段 4内受到压縮,温度升高, 天然气的压力升高到设计的压力值, 在此过程中, 气流的速度、 压力和温度达不到水合物的形成条件, 因此有效防止了天然气管 道内形成水合物。
天然气的流量为 10000m3 /天, 天然气的来流压力为 15Mpa, 天然气的温度为 293K, 比 热比为 1.3,要求天然气经过新型气流降压装置 10后的压力降为 3Mpa,经过降压后的天然气 进入分离器分离。
根据天然气流量、 压力、 温度、 比热比等参数, 设计新型气流降压装置 10的超声速喷管 2的喉道直径 D1为 4~8mm。
根据压力降比值 15/3, 设计新型气流降压装置 10的超声速喷管 2的马赫数为 1.5~4。 确定超声速喷管 2的进口段 1的直径与天然气管道直径相同, 根据设计的马赫数确定超 声速喷管 2的出口直径 D2为 7~13mm。
根据超声速喷管 2的出口直径 D2, 按 D4= ( 1.2~2) X D2来计算入口段 6的直径 D4为 8.3~30mm,按照 D5= ( 1.2~2) X D4来计算直管段 7的直径 D5为 10~60mm,按照 D6= (2-3) X D4来计算亚扩段 8的直径 D6为 10~180mm, 按照 3 L3/D5 10来计算直管段 7的长度 L3为 30~600mm, 按照 L4= (3-6) X (D6-D5) 来计算亚扩段 8的长度 L4为 300~600mm。
根据超声速喷管 2的出口直径 D2, 按照 D3= ( 1.2~3) X D2来计算连接段 3的直径 D3 为 7~45mm, 按照 Ll= ( 1.2-2) X D2来计算连接段 3的长度 L1为 8.4~90mm。
根据天然气管道直径, 新型气流降压装置 10的进口段 1的直径与天然气管道直径相同, 按照 L5=2X D6来计算出口段 5的长度 L5为 40~360mm。
根据以上计算结果, 设计新型气流降压装置 10, 若是现场安装尺寸有限, 可适当调整出 口段 5的长度 L5。
由于天然气在新型气流降压装置 10的超声速喷管 2和压力温度恢复段 4内气流速度大, 气流造成的冲蚀严重, 因此新型气流降压装置 10的内表面采用高抗冲蚀的材料, 如陶瓷、硬 质合金, 或者采用堆焊或喷涂一层高抗冲蚀材料方式, 降低成本。
本发明所述一种使用新型气流降压装置的气流降压方法, 所述方法包括以下步骤:
1.天然气气体从新型气流降压装置的进口段进入超声速喷管中, 天然气气体的速度增加, 压力和温度降低;
2.压力和温度降低后的天然气从超声速喷管中进入压力温度恢复段, 温度升高, 压力升 高到设定值。
优选为, 将两个新型气流降压装置串联使用, 能够显著降低天然气的压力。
优选为, 在新型气流降压装置上连接一个节流阀, 同样能够显著降低天然气的压力。 在设计井场管道、 阀门和工艺流程时, 可将新型气流降压装置 10作为一个阀门件, 安装 在管道与阀门之间, 对井场进行改造时, 可按下述过程安装: 首先关闭天然气来流阀门, 在 天然气管道上截一段与新型气流降压装置 10等长的管道, 将新型气流降压装置 10通过法兰 连接在天然气管道上, 开启天然气阀门, 新型气流降压装置 10正常工作, 压力降至设计要求 的 3MPa, 温度约为 290K。
天然气流量为 10000 m3 /天, 天然气来流压力为 35Mpa, 温度为 303K, 比热比为 1.3, 要 求天然气经过新型气流降压装置 10后压力降至 2.5MPa, 然后进入分离器分离。
由于新型气流降压装置 10前后压差大, 因此采用两个新型气流降压装置 10串联使用, 分两级降压, 降压效果更好。
第一级压降, 采用新型气流降压装置 10, 压力降为来流总压的 1/5, 即压力降到 7 MPa 根据第一级新型气流降压装置后的气流参数, 即压力为 7 MPa、 流量 10000 m3 /天, 温度 约 303K, 比热比 1.3, 设计第二级新型气流降压装置。
超声速喷管喉道直径 D1为 9~15mm。
根据第二级要求的压降,前后压降比约为 7/2.5=2.8倍,设计超声速喷管马赫数为 2.3~2.5。 确定第二级新型气流降压装置 10的超声速喷管进口段 1的直径与第一级降压装置 10的 出口段 5的直径相同。
根据设计的马赫数计算超声速喷管出口直径 D2为 15~20mm。
根据超声速喷管出口直径 D2, 按 D4= ( 1.2-2) X D2 来计算入口段 6 的直径 D4 为 18~40mm, 按照 D5= ( 1.2-2) X D4来计算直管段 7的直径 D5为 20~80mm, 按照 D6= (2-3)
X D4来计算亚扩段 8的直径 D6为 36~240mm, 按照 2X (D4-D5) L2 25 X (D4-D5)来计 算入口段 6 的长度 L2 为 40~80 mm, 按照 3 L3/D5 10 来计算直管段 7 的长度 L3 为 80~800mm, 按照 L4= (3-6) X (D6-D5) 来计算亚扩段 8的长度 L4为 400~800mm。
根据超声速喷管 2出口直径 D2, 按照 D3= ( 1.2-3) X D2来计算连接段 3的直径 D3为 20~60mm, 按照 Ll= ( 1.2-2) X D2来计算连接段 3的长度 L1为 24~120mm。
第二级降压装置出口段 5按照 L5=2X D6, 计算出口段 5的长度 L5为 80~480mm。
第一级与第二级降压装置之间, 采用一段长约 500mm的管道, 通过法兰连接, 组成一个 整体的降压装置, 并且两级新型气流降压装置 10的安装顺序不能颠倒。
在设计井场管道、 阀门和工艺流程时, 可将新型气流降压装置 10作为一个阀门件, 安装 在管道与阀门之间, 在对井场进行改造时, 可按下述过程安装: 首先关闭天然气来流阀门, 在天然气管道上截一段与新型气流降压装置 10等长的管道, 将新型气流降压装置 10通过法 兰连接在天然气管道上, 开启天然气阀门, 新型气流降压装置 10正常工作, 压力降至设计要 求的 2.5MPa, 天然气温度约为 300K。
天然气流量为 I X 10000 m3 /天, 天然气来流压力为 14Mpa, 温度为 293K, 比热比为 1.3, 要求天然气经过新型气流降压装置 10后的压力为 2.5MPa。
采用组合阀门结构由一个节流阀与新型气流降压装置 10构成, 节流阀可以是针形阀, 节 流阀前连接一段与天然气管道直径相同、长约 2~15倍的管道直径的过渡段, 过渡段与新型气 流降压装置 10连接。
组合阀门安装时, 关闭天然气总阀门, 在现有天然气管道上截取一节与组合阀门等长度 的管道。
将组合阀门通过法兰连接到天然气管道上。
开启天然气总阀门, 并调节组合阀门中的节流阀, 组合阀门出口压力为 2.5MPa, 温度为 290K。
本发明新型气流降压装置 10结构简单, 气流压力调节范围广, 安装操作简单, 运行维护 费用低, 维修简单方便。
最后应说明的是: 以上实施例仅说明本发明的技术方案, 而非对其限制; 尽管参照前述 实施例对本发明进行了详细的说明, 本领域的普通技术人员应当理解: 其依然可以对前述各 实施例所记载的技术方案进行修改, 或者对其中部分技术特征进行等同替换; 而这些修改或 者替换, 并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。
Claims
1. 一种新型气流降压装置, 其特征在于, 所述新型气流降压装置包括进口段、 与进口段 连接的超声速喷管、 压力温度恢复段、 连接所述超声速喷管和压力温度恢复段的连接段, 所 述压力温度恢复段包括入口段、 直管段和亚扩段, 所述亚扩段连接有出口段。
2. 根据权利要求 1所述的新型气流降压装置, 其特征在于, 所述超声速喷管的喉道直径 为 Dl, 所述超声速喷管的出口直径为 D2, 1<D2/D1<4。
3. 根据权利要求 2所述的新型气流降压装置, 其特征在于, 所述连接段的直径为 D3, 长度为 Ll, D3〉D2, L1〉D2。
4. 根据权利要求 1所述的新型气流降压装置, 其特征在于, 所述入口段的直径为 D4, 长度为 L2, 所述直管段的直径为 D5, 长度为 L3, 所述亚扩段直径为 D6, 长度为 L4, 1·5 D4/D2^3, 2X (D4-D5) ^L2^25X (D4-D5) , D5/D1^1, D5/D2 3, 3 L3/D5 30, 2X (D6-D5) ^L4^25X (D6-D5) 。
5. 根据权利要求 1所述的新型气流降压装置, 其特征在于, 所述出口段的直径为 D6, 长度为 L5, 0 L5/D6 5。
6. 根据权利要求 1所述的新型气流降压装置, 其特征在于, 所述新型气流降压装置的内 表面采用 SIC陶瓷、 硬质合金材质。
7. 一种使用权利要求 1所述的新型气流降压装置的气流降压方法, 所述方法包括以下步 骤:
(1)天然气气体从新型气流降压装置的进口段进入超声速喷管中, 天然气气体的速度增 加, 压力和温度降低;
(2)压力和温度降低后的天然气从超声速喷管中进入压力温度恢复段, 温度升高, 压力 升高到设定值。
8. 根据权利要求 7所述的气流降压方法, 其特征在于, 将两个新型气流降压装置串联。
9. 根据权利要求 7所述的气流降压方法, 其特征在于, 在新型气流降压装置上连接一个 节流阀。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2013/077001 WO2014194529A1 (zh) | 2013-06-08 | 2013-06-08 | 一种新型气流降压装置及气流降压方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2013/077001 WO2014194529A1 (zh) | 2013-06-08 | 2013-06-08 | 一种新型气流降压装置及气流降压方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014194529A1 true WO2014194529A1 (zh) | 2014-12-11 |
Family
ID=52007443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2013/077001 WO2014194529A1 (zh) | 2013-06-08 | 2013-06-08 | 一种新型气流降压装置及气流降压方法 |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2014194529A1 (zh) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3451625A (en) * | 1966-08-11 | 1969-06-24 | Us Air Force | Nozzle configurations and metallic seal design |
US3660982A (en) * | 1969-07-28 | 1972-05-09 | Aerospatiale | Non-return device for fluid ducts and thrust reversers |
US4041984A (en) * | 1976-07-01 | 1977-08-16 | General Motors Corporation | Jet-driven helmholtz fluid oscillator |
CN2786411Y (zh) * | 2005-04-07 | 2006-06-07 | 边晓阳 | 节汽阀头的流道改进结构 |
CN1325806C (zh) * | 2005-12-26 | 2007-07-11 | 重庆大学 | 管道脉冲流发生器 |
CN202017679U (zh) * | 2010-12-20 | 2011-10-26 | 西安航天远征流体控制股份有限公司 | 一种气体减压装置 |
CN103075376A (zh) * | 2013-01-30 | 2013-05-01 | 南京理工大学 | 一种容积膨胀式高压气体减压系统 |
-
2013
- 2013-06-08 WO PCT/CN2013/077001 patent/WO2014194529A1/zh active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3451625A (en) * | 1966-08-11 | 1969-06-24 | Us Air Force | Nozzle configurations and metallic seal design |
US3660982A (en) * | 1969-07-28 | 1972-05-09 | Aerospatiale | Non-return device for fluid ducts and thrust reversers |
US4041984A (en) * | 1976-07-01 | 1977-08-16 | General Motors Corporation | Jet-driven helmholtz fluid oscillator |
CN2786411Y (zh) * | 2005-04-07 | 2006-06-07 | 边晓阳 | 节汽阀头的流道改进结构 |
CN1325806C (zh) * | 2005-12-26 | 2007-07-11 | 重庆大学 | 管道脉冲流发生器 |
CN202017679U (zh) * | 2010-12-20 | 2011-10-26 | 西安航天远征流体控制股份有限公司 | 一种气体减压装置 |
CN103075376A (zh) * | 2013-01-30 | 2013-05-01 | 南京理工大学 | 一种容积膨胀式高压气体减压系统 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2013056597A1 (zh) | 一种抽压交替的瓦斯抽采方法及装备 | |
CN105443088B (zh) | 低压气井双流体超音速雾化排水采气系统及其工艺 | |
WO2007075860A3 (en) | Gas wellhead extraction system and method | |
CN104481575B (zh) | 一种热蒸汽驱替瓦斯提高瓦斯抽采效率的方法 | |
CN205387930U (zh) | 低压气井双流体超音速雾化排水采气系统 | |
CN106837266B (zh) | 基于射流与涡流一体的气井井下排水采气工具 | |
CN105626004A (zh) | 一种油气井放喷用耐冲蚀节流管汇 | |
EP3676478B1 (en) | Removing debris from a hydrocarbon fluid | |
CN208294498U (zh) | 一种可调节式油井井口套管气的排放装置 | |
CN111042772A (zh) | 一种井间串接排水采气装置和排水采气方法 | |
CN108952617A (zh) | 一种纽带式气井开井缓堵装置及其应用方法 | |
WO2014194529A1 (zh) | 一种新型气流降压装置及气流降压方法 | |
CN102749202A (zh) | 发动机磨合台架水循环系统 | |
CA2463175A1 (en) | Gas turbine for oil lifting | |
CN111520103A (zh) | 一种地面节流装置 | |
NO20092219L (no) | Fremgangsmate og system for produksjon av underkjolt hydrokarbon, inkludert maserering av utfellingsprodukter | |
CN110863795A (zh) | 一种通过高压气源排除地面管线积液的方法 | |
CN106351619B (zh) | 一种用于天然气井井下螺旋节流装置 | |
EA201390896A1 (ru) | Устройство и способ высокоинтегрированной системы защиты оборудования устьев кустовых скважин | |
CN202693313U (zh) | 发动机台架试验水循环系统 | |
CN111664356B (zh) | 一种井场节流方法及井场节流系统 | |
CN203925432U (zh) | 一种采油树装置 | |
CN104632603B (zh) | 泵试验回路除气装置 | |
CN203783537U (zh) | 采气计量系统 | |
CN205225088U (zh) | Sagd双水平井及其生产井的井口排放装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13886562 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 01.04.2016) |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13886562 Country of ref document: EP Kind code of ref document: A1 |