CN-121024565-B - Multifunctional integrated device for gas field gas collection and use method

CN121024565BCN 121024565 BCN121024565 BCN 121024565BCN-121024565-B

Abstract

The invention relates to the technical field of natural gas exploitation, in particular to a multifunctional integrated device for gas field gas collection and a use method thereof. The device comprises a separation tank, a buffer tank and a sledge body which are sequentially arranged from top to bottom, wherein the buffer tank and the separation tank are fixedly connected with the sledge body, a vertical partition plate is arranged in the separation tank and divides the separation tank into a production separation cavity and a vent separation cavity, the bottom of the production separation cavity is communicated with the buffer tank through a first connecting pipe, a second connecting pipe and a third connecting pipe are arranged at the upper part of the production separation cavity, a separation chamber with an inclined bottom plate is fixedly arranged in the production separation cavity, the second connecting pipe is communicated to the upper side of the bottom plate in the vertical direction, the lower side of the bottom plate is connected to the lower part of the production separation cavity through a discharge pipe, and an air outlet is formed in the upper part of the side wall of the separation chamber. The device can carry out whole transportation, reduces the field construction cycle by a wide margin, and the design of integrating has reduced the pipeline connected node by a wide margin and then has reduced the fault point.

Inventors

LV YINGCHAO
DU LIMIN
ZHANG WEIJIE
ZHENG CHAO
CAO HONGLIANG
SHI MEIYUN
ZHONG LEI
LIANG GUANGCHUAN
ZHOU JUN

Assignees

中石化中原石油工程设计有限公司
成都伊斯顿过滤器有限公司
西南石油大学

Dates

Publication Date: 20260508
Application Date: 20251021

Claims (12)

1. The multifunctional integrated device for collecting gas in a gas field is characterized by comprising a sledge body (1), a separation tank (2) and a buffer tank (3); The buffer tank (3) is positioned above the sledge body (1) and is fixedly connected with the sledge body (1), and the separation tank (2) is positioned above the buffer tank (3) and is fixedly connected with the sledge body (1); A vertical partition board (21) is fixedly arranged in the separating tank (2), and the partition board (21) divides the interior of the separating tank (2) into a production separating cavity (22) and a venting separating liquid cavity (23); The bottom of the production separation cavity (22) is communicated with the buffer tank (3) through a first connecting pipe (41), a valve is connected in the first connecting pipe (41), and a second connecting pipe (42) for connecting well mouth gas and a third connecting pipe (43) for outputting finished gas are arranged at the upper part of the production separation cavity (22); An inertial separation assembly is arranged in the production separation cavity (22), the inertial separation assembly comprises a separation chamber (51), the separation chamber (51) is fixedly connected with the separation tank (2), a bottom plate (52) of the separation chamber (51) is obliquely arranged, the second connecting pipe (42) is communicated to the upper part of the higher side of the bottom plate (52) along the vertical direction through the top of the separation chamber (51), the lower side of the bottom plate (52) is connected to the lower part of the production separation cavity (22) through a discharge pipe (53), and an air outlet (54) is formed in the upper part of the side wall of the separation chamber (51) positioned on the lower side of the bottom plate (52); A cyclone separation assembly is also arranged in the production separation cavity (22), and comprises a guide-in cylinder (61), a cyclone taper pipe (62) and a guide-out pipe (63) which are coaxially arranged; The upper end of the guide-in tube (61) is closed and fixedly connected with the separation tank (2), the large end of the rotational flow taper tube (62) is upward and fixedly connected with the lower end of the guide-in tube (61), the upper end of the guide-out tube (63) is fixedly connected with the small end of the rotational flow taper tube (62), and the lower end of the guide-out tube (63) is higher than the lower end of the discharge tube (53); an introduction pipe (64) is connected to the side wall of the introduction pipe (61), and the axis of the introduction pipe (64) is tangential to the inner peripheral wall of the introduction pipe (61), and the air outlet (54) is connected to the inside of the introduction pipe (61) through the introduction pipe (64); a water mist trapping assembly is further arranged in the production separation cavity (22), and comprises a mist trapping taper pipe (71) and an air distribution taper (72); The small end of the mist-catching cone pipe (71) is upwards and communicated with the third connecting pipe (43), and the mist-catching cone pipe (71) is fixedly connected with the separation tank (2); The gas distribution cone (72) and the mist capturing cone pipe (71) are coaxial and have equal taper, the gas distribution cone (72) is fixedly connected with the mist capturing cone pipe (71), the bottom surface of the gas distribution cone (72) faces downwards, and a gap exists between the mist capturing cone pipe (71) and the gas distribution cone (72); a fourth connecting pipe (44) for connecting the discharged air and a fifth connecting pipe (45) for outputting the discharged air after liquid separation to a torch are arranged at the upper part of the discharged liquid separation cavity (23); A plurality of first separation plates (81) are vertically arranged in the emptying liquid separation cavity (23), the outer peripheral wall of each first separation plate (81) is fixedly connected with the inner peripheral wall of the emptying liquid separation cavity (23), and a first through hole (82) is formed in the lower portion of each first separation plate (81); A second separation plate (83) is vertically arranged between any two adjacent first separation plates (81), the outer peripheral wall of the second separation plate (83) is fixedly connected with the inner peripheral wall of the emptying liquid separation cavity (23), and a second through hole (84) is formed in the upper part of the second separation plate (83); Each of the first separating plates (81) and each of the second separating plates (83) is located between the fourth connecting pipe (44) and the fifth connecting pipe (45).
2. The gas field gas collection multifunctional integrated device according to claim 1, wherein: A slag collecting hopper (55) with an upward opening is further arranged in the production separation cavity (22), the bottom of the slag collecting hopper (55) is communicated with the first connecting pipe (41), and the tail end of the discharge pipe (53) is positioned at the inner side of the slag collecting hopper (55); a plurality of water permeable holes (551) are arranged at the lower part of the slag collecting hopper (55).
3. The gas field gas collection multifunctional integrated device according to claim 1, wherein: The system also comprises a liquid level meter and a control terminal; The liquid level meter is communicated with the production separation cavity (22) and is used for monitoring the liquid level height inside the production separation cavity (22), the valve is an electric control valve, and the liquid level meter and the electric control valve are electrically connected to the control terminal; and the control terminal responds to the liquid level information output by the liquid level meter and controls the electric control valve to be opened or closed.
4. A gas field gas collection multifunctional integrated device according to claim 3, characterized in that: When the liquid level height represented by the liquid level information is higher than a first preset height, the control terminal controls the electric control valve to be opened; Under the condition that the liquid level height represented by the liquid level information is lower than a second preset height, the control terminal controls the electric control valve to be closed; Wherein the first preset height is higher than the second preset height, which is higher than the end of the discharge pipe (53).
5. The gas field gas collection multifunctional integrated device according to claim 1, wherein: The cyclone separation assembly further comprises a rectifying cone (65) and a rectifying column (66) which are coaxially arranged; The upper end face of the rectifying column (66) is fixedly connected with the guide-in cylinder (61), and the bottom face of the rectifying cone (65) faces upwards and is fixedly connected with the lower end face of the rectifying column (66); The radius of the rectifying column (66) is equal to the radius of the bottom surface of the rectifying cone (65), the conicity of the rectifying cone (65) is equal to the conicity of the cyclone cone tube (62), and a gap exists between the rectifying cone (65) and the cyclone cone tube (62).
6. The gas field gas collection multifunctional integrated device according to claim 1, wherein: a plurality of first mist capturing rings (73) are fixedly arranged on the outer peripheral surface of the gas distribution cone (72), and each first mist capturing ring (73) is arranged at intervals, and a gap exists between one end far away from the gas distribution cone (72) and the inner peripheral surface of the mist capturing cone pipe (71); a plurality of second mist capturing rings (74) are fixedly arranged on the inner peripheral surface of the mist capturing taper pipe (71), and each second mist capturing ring (74) is arranged at intervals, and a gap exists between one end far away from the mist capturing taper pipe (71) and the outer peripheral surface of the gas distribution taper (72); each first mist capturing ring (73) and each second mist capturing ring (74) are arranged in a staggered mode.
7. The gas field gas collection multifunctional integrated device according to claim 1, wherein: a first mist capturing piece (75) is spirally wound on the gas distribution cone (72) along the outer peripheral surface, and a second mist capturing piece (76) is spirally wound on the mist capturing cone pipe (71) along the inner peripheral surface; A gap exists between the first mist capturing piece (75) and the inner peripheral wall of the mist capturing taper pipe (71), and a gap exists between the second mist capturing piece (76) and the outer peripheral surface of the gas distribution taper (72); the first mist capturing pieces (75) and the second mist capturing pieces (76) are arranged in a staggered mode.
8. The gas field gas collection multifunctional integrated device according to claim 1, wherein: The bottom of the emptying liquid separating cavity (23) at two sides of each second separating plate (83) is connected with a vertically arranged liquid discharging branch pipe (46), the lower ends of the liquid discharging branch pipes (46) are communicated through connecting pipes (47), the middle part of one liquid discharging branch pipe (46) is connected with a horizontal liquid discharging main pipe (48), one end, far away from the liquid discharging branch pipe (46), of the liquid discharging main pipe (48) downwards extends into the buffer tank (3), a vertical balance pipe (49) is connected to the liquid discharging main pipe (48), and one end, far away from the liquid discharging main pipe (48), of the balance pipe (49) is connected to the upper part of the emptying liquid separating cavity (23).
9. The gas field gas collection multifunctional integrated device according to claim 1, wherein: A filter plate (91) is fixedly arranged in the buffer tank (3), and the filter plate (91) is positioned at the lower part of the first connecting pipe (41); A slag discharge port (92) is formed in the buffer tank (3), and the slag discharge port (92) is positioned above the filter plate (91); The slag discharging opening (92) is detachably connected with a sealing cover (93), and the sealing cover (93) can enable the position where the slag discharging opening (92) is located to be airtight.
10. The gas field gas collection multifunctional integrated device according to claim 1, wherein: A flowmeter is connected to the third connection pipe (43).
11. A method of using a gas field gas collection multifunctional integrated device according to any one of claims 4 to 7, characterized by comprising: installing the gas field gas collection multifunctional integrated device at a preset position; closing the valve and injecting water into the production separation chamber (22) until the liquid level in the production separation chamber (22) is higher than the end of the discharge pipe (53); And connecting the well head gas to the second connecting pipe (42) so that the well head gas is separated and treated by the production separation cavity (22) to obtain finished gas and output by the third connecting pipe (43).
12. The method of use according to claim 11, wherein: Opening the valve in case the liquid level in the production separation chamber (22) is higher than the first preset level, so that liquid and particulate impurities generated in the production separation chamber (22) are discharged towards the buffer tank (3); and closing the valve until the liquid level in the production separation chamber (22) is lower than the second preset level, so that the liquid in the production separation chamber (22) continues to accumulate.

Description

Multifunctional integrated device for gas field gas collection and use method Technical Field The invention relates to the technical field of natural gas exploitation, in particular to a multifunctional integrated device for gas field gas collection and a use method thereof. Background Natural gas is the main fuel in the daily life of residents, and the natural gas obtained by exploitation usually needs to be conveyed through long-distance pipelines to enter thousands of households. The well head gas produced by the gas production station can be conveyed only by the steps of sand removal, gas-liquid separation, water mist trapping and the like, so that the phenomenon that sand is impacted and worn by sand grains and even blocks a pipeline in the natural gas conveying process can be avoided, the well head gas is subjected to gas-liquid separation and water mist trapping, water drops and water mist are collected to form a liquid plug in the natural gas conveying process, and further pipeline pressure fluctuation and pipeline vibration even pipe explosion accidents are caused. In order to perform treatment operations such as sand removal, gas-liquid separation and water mist trapping on the well head gas, a sand removal device, a gas-liquid separation device and a defogging device are usually arranged in a natural gas station, so that the well head gas can be sequentially subjected to the purification treatment by the devices, however, the conventional series split design generally needs to be transported separately, has large field area required by field installation, has more pipeline connection nodes between the devices, and has long field installation construction period. Disclosure of Invention The invention aims to provide a multifunctional integrated device for gas field gas collection and a use method thereof, which are used for integrating functional components such as desanding, gas-liquid separation, water mist trapping and the like into a skid body, so that the integrated device can be used for carrying out integral transportation, greatly shortening the field construction period, greatly reducing pipeline connection nodes and further reducing fault points due to integrated design, is particularly suitable for the initial production or debugging stage of a gas well, and is used for guaranteeing the gas production, monitoring the productivity and safe external transportation or emptying of the gas well. The invention provides a multifunctional integrated device for gas field gas collection, which comprises a sledge body, a separation tank and a buffer tank, wherein the buffer tank is positioned above the sledge body and fixedly connected with the sledge body, the separation tank is positioned above the buffer tank and fixedly connected with the sledge body, a vertical partition plate is fixedly arranged in the separation tank and divides the separation tank into a production separation cavity and a vent liquid separation cavity, the bottom of the production separation cavity is communicated with the buffer tank through a first connecting pipe, a valve is connected in the first connecting pipe, a second connecting pipe for accessing well mouth gas and a third connecting pipe for outputting finished gas are arranged at the upper part of the production separation cavity, an inertial separation assembly is arranged in the production separation cavity, the inertial separation assembly comprises a separation chamber, the separation chamber is fixedly connected with the separation tank, a bottom plate of the separation chamber is obliquely arranged, the second connecting pipe is communicated to the upper side of the bottom plate through the top of the separation chamber in the vertical direction, and is communicated to the lower side of the bottom plate, and the lower side wall of the separation chamber is communicated with the lower side of the bottom plate through the separation chamber. Further, a slag collecting hopper with an upward opening is arranged in the production separation cavity, the bottom of the slag collecting hopper is communicated with the first connecting pipe, the tail end of the discharge pipe is positioned at the inner side of the slag collecting hopper, and a plurality of water permeable holes are formed in the lower part of the slag collecting hopper. The multifunctional integrated device for collecting gas in the gas field further comprises a liquid level meter and a control terminal, wherein the liquid level meter is communicated with the production separation cavity and used for monitoring the liquid level height in the production separation cavity, the valve is an electric control valve, the liquid level meter and the electric control valve are electrically connected to the control terminal, and the control terminal responds to liquid level information output by the liquid level meter and controls the electric control valve to be opened or closed. Further, the control terminal