CN105999868B - Gas-liquid separator for open flow in oil-gas well test - Google Patents
Gas-liquid separator for open flow in oil-gas well test Download PDFInfo
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- CN105999868B CN105999868B CN201610302246.3A CN201610302246A CN105999868B CN 105999868 B CN105999868 B CN 105999868B CN 201610302246 A CN201610302246 A CN 201610302246A CN 105999868 B CN105999868 B CN 105999868B
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- lifting plate
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- 239000007788 liquid Substances 0.000 title claims abstract description 79
- 238000012360 testing method Methods 0.000 title claims abstract description 19
- 238000000926 separation method Methods 0.000 claims abstract description 53
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 238000011044 inertial separation Methods 0.000 abstract description 4
- 238000005192 partition Methods 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
- 230000005484 gravity Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- 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
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
-
- 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
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
-
- 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
- E21B47/00—Survey of boreholes or wells
Landscapes
- Geology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Separating Particles In Gases By Inertia (AREA)
- Cyclones (AREA)
Abstract
The invention discloses a gas-liquid separator for testing open flow of an oil-gas well, which comprises a spiral lifting plate (2), wherein a separator gas-liquid inlet (1) is formed in the front end of the spiral lifting plate (2), a spiral lifting plate upper top plate (10) and a separator upper separation space (11) and a separator exhaust pipe (12) are arranged above the spiral lifting plate (2), a separator separation space (3), a separator bottom cone section (5) and a separator liquid outlet (7) are arranged below the spiral lifting plate (2), and a separator gas riser (9) is arranged in the center of the spiral lifting plate (2) and forms a secondary separation communication area. The invention can form a two-stage gas-liquid separation process in a single separator, realizes the penetration of a liquid flow passage for two-stage separation through the specially designed partition plate and the slit structure, greatly simplifies the equipment structure of the gas-liquid separator for testing and blowout of the oil gas well and meets the skid-mounted miniaturization based on the centrifugal and inertial separation principles.
Description
Technical Field
The invention relates to a gas-liquid separator for testing open flow of an oil gas well, and belongs to the field of oil gas well testing equipment in petroleum engineering.
Background
In the development of a shale gas test gas production safety emptying combustion system, a high-efficiency shale gas test gas blowout gas-liquid separator needs to be developed. The gas testing process has the characteristics of large variation of the gas release quantity and the liquid carrying quantity and large pressure, and the gas release carrying liquid can seriously influence the subsequent gas flow measurement and the safe combustion of the gas release. The gravity type gas-liquid separator is mainly used for separating two phases by utilizing the density (specific gravity) difference of the gas-liquid two phases, namely, when the gravity of liquid is greater than the buoyancy of gas, liquid drops are settled out of the gas phase to be separated. Although the gravity separator has simple structure, the gravity separator has larger volume, long residence time and poor separation effect, manual liquid level condition monitoring is needed to control the drainage condensation, and the safety and the reliability are poor. At present, the high-efficiency gas-liquid separation is researched more by cyclone separation technology, and the technology has the characteristic of high separation efficiency, but has strict requirements on gas flow. When shale gas is tested to be blown out, the pressure in the shaft is gradually released, the pressure in the gas-liquid separator is synchronously increased along with the increase of the gas yield, and when the blowing-out gas yield is within 50 square meters, the pressure in the separator is within the range of 1.5-3.5 MPa. Meanwhile, due to the characteristics of the shale gas reservoir, the liquid content in the initial stage of open flow is larger, and the gas content is smaller; after the underground liquid and the condensate liquid generated by the pressure reduction are released, the underground pressure is gradually released, the gas quantity is gradually increased, and the liquid content also tends to be stable. In general, the difficulty of shale gas blow-off gas-liquid separation is the high-efficiency separation capacity of the separator at the initial stage of large liquid volume separation and variable working conditions.
The change rule of the ratio of gas to liquid is complex when the shale gas is blown out, the traditional three-phase separator needs longer residence time, the volumes of the separators are large, and the efficiency of the separators is low. Therefore, the invention aims to realize buffering and high-efficiency separation under different gas-liquid working conditions in a limited space by adopting a special design rotational flow rotary structure in a centrifugal separation device and a two-stage separator space and adopting centrifugal separation and an inertial separation mechanism, reduce the volume of the separator and realize a two-stage separation process in a single separator.
Disclosure of Invention
The invention relates to a gas-liquid separator for testing open flow of an oil gas well, which is characterized in that an upper separator space and a lower separator space are formed by a top plate at the upper part of a spiral lifting plate in the separator. After entering the separator, the gas-liquid fluid can enter the upper secondary separation space through the central riser by the centrifugal separation process similar to the double-layer cyclone structure in the cyclone separator formed in the lower separation space under the action of the spiral type cyclone plate, and the gas separated for the first time carries a small amount of liquid drops to enter the upper secondary separation space, so that the purpose of high-efficiency separation and the simplification target of equipment are achieved by the cyclone and inertia effect, and the skid-mounted miniaturization of the open-flow equipment is realized.
The structure of the invention comprises:
1. A separator gas-liquid inlet, 2, a spiral swirl plate, 3, a separator separation space, 4, a separator wall, 5, a separator bottom cone section, 6, a separator lower drop settling space, 7, a separator drain, 8, a separator cone section drain, 9, a separator riser, 10, a spiral swirl plate upper top plate, 11, a separator upper separation space, 12, a separator exhaust pipe, 13, a separator purge gas outlet, 14, an upper separation space drain tank, 15, a cone section outer drain channel, 16, a cone section lower annular baffle, a separator gas-liquid inlet 1 at the front end of the spiral swirl plate 2, a spiral swirl plate upper top plate 10 above the spiral swirl plate 2, the center of the spiral lifting plate 2 is provided with a separator lift pipe 9, the lower part of the spiral lifting plate 2 is provided with a separator bottom cone section 5 and a separator liquid outlet 7, the upper part of the spiral lifting plate 2 is provided with a separator exhaust pipe 12 and a separator purified gas outlet 13, an upper separator separation space 11 is arranged between a top plate 10 on the upper part of the spiral lifting plate and the separator exhaust pipe 12, a separator separation space 3 is arranged between the separator lift pipe 9 and the separator bottom cone section 5, the lower end of the separator bottom cone section 5 is provided with a separator cone section liquid outlet 8, and a separator lower liquid drop sedimentation space 6 is arranged between the separator bottom cone section 5 and the separator liquid outlet 7.
The invention also adopts the following embodiments:
The diameter D2 of the separator riser 9 is between 0.4 and 0.8 of the inner diameter D1 of the separator
The insertion depth H4 of the exhaust pipe 12 of the separator is 0.5-1.5 of the height H1 of the separation space 11 on the separator
The diameter D3 of the upper port of the cone section 5 at the bottom of the separator is between 0.8 and 0.95 of the inner diameter D1 of the separator
The diameter D4 of the separator exhaust pipe 12 is between 0.05 and 0.25 of the inner diameter D1 of the separator
6 To 12 upper separation space liquid discharge grooves 14 are uniformly distributed on the upper edge of the top plate 10 of the upper part of the spiral lifting plate along the circumferential direction, the width of the slit is 2 to 10mm, and the length is 5 to 25mm
An annular cone section outside liquid discharge channel 15 is arranged between the upper part of the cone section 5 at the bottom of the separator and the wall surface 4 of the separator
The invention provides an oil-gas well test blow-out gas-liquid separator which is a high-efficiency separator device based on centrifugal separation and inertia separation mechanisms and has certain fluctuation working condition buffering capacity.
Drawings
FIG. 1 is a schematic diagram of a gas-liquid separator for testing open flow of an oil and gas well according to the present invention.
In FIG. 1, a separator gas-liquid inlet, 2, a spiral lifting plate, 3, a separator separation space, 4, a separator wall, 5, a separator bottom cone section, 6, a separator lower drop settling space, 7, a separator drain, 8, a separator cone section drain, 9, a separator riser, 10, a spiral lifting plate upper top plate, 11, a separator upper separation space, 12, a separator exhaust pipe, 13, a separator purge gas outlet.
FIG. 2 is a schematic diagram of the structure of the upper part of the gas-liquid separator for open flow testing of the oil gas well, which is provided with a separated space liquid discharge groove 14, a liquid discharge channel 15 outside the cone section and a ring-shaped baffle 16 below the cone section;
in fig. 2, 14. Upper separation space drain tank, 15. Outside drain channel of cone section, 16. Lower annular baffle of cone section.
Detailed Description
The gas-liquid separator for testing open flow of the oil-gas well is described below with reference to the accompanying drawings.
Referring to fig. 1, a gas-liquid separator nozzle for oil-gas well test blowout comprises 1a separator gas-liquid inlet 2a spiral lifting plate 3a separator separation space 4a separator wall 5a separator bottom cone section 6 a separator lower drop settling space 7 a separator drain 8 a separator cone section drain 9 a separator riser 10a spiral lifting plate upper top plate 11a separator upper separation space 12a separator exhaust pipe 13a separator purge gas outlet 14 an upper separation space drain 15 a cone section outer drain 16 a cone section lower annular baffle, the front end of the spiral lifting plate 2 has a separator gas-liquid inlet 1, the center of the spiral lifting plate 2 has a separator gas pipe 9 a separator bottom cone section 5 and a separator drain 7 below the spiral lifting plate 2, the separator top cone section 12 and the separator drain 12 between the separator conical section 5 and the separator bottom cone section 5 and the separator drain 6 a separator drain opening between the separator conical section 5 and the separator top plate 3.
The diameter D2 of the separator riser 9 is between 0.4 and 0.8 of the inner diameter D1 of the separator, and the insertion depth H4 of the separator exhaust pipe 12 is between 0.5 and 1.5 of the height H1 of the separation space 11 on the separator; the diameter D3 of the upper port of the cone section 5 at the bottom of the separator is between 0.8 and 0.95 of the inner diameter D1 of the separator; the diameter D4 of the separator exhaust pipe 12 is between 0.05 and 0.25 of the separator inner diameter D1.
Referring to fig. 2, 6 to 12 upper separated space liquid discharge grooves 14 are uniformly distributed on the upper edge of the upper top plate 10 of the spiral lifting plate along the circumferential direction, the width of the slit is 2 to 10mm, and the length is 5 to 25mm; an annular cone section outside drain passage 15 is arranged between the upper part of the separator bottom cone section 5 and the separator wall 4.
The jet-propelled gas carries liquid drops to enter a spiral lifting plate 2 of the separator through a gas-liquid inlet 1 of the separator to form spiral downward rotation movement, then a double-layer strong-swirl flow field structure (the inner part is a rigid vortex upward flow, the outer part is a quasi-free vortex downward flow) is formed in a separation space 3, the liquid drops move to a wall surface under the action of centrifugal force and move along with the downward flow to a cone section 5 at the bottom of the separator, and most liquid drops enter a liquid drop sedimentation space 6 at the lower part of the separator from a liquid discharge channel 15 at the outer side of the cone section, so that the primary separation and the buffering effect of flow fluctuation are realized; the small amount of liquid drops move upwards along with the upward flow direction in the separator riser 9 after rotating and accelerating in the separator bottom cone section 5, the small amount of liquid moves towards the inner wall of the separator riser 9 under the action of centrifugal force due to the reduced rotating and accelerating radius, and keeps rotating and diffusing movement with the outlet of the small amount of liquid drops, and the gas and liquid can enter the separator exhaust pipe 12 only after turning with large curvature in the upper separation space 11 of the separator due to the fact that the diameter of the separator exhaust pipe 12 is smaller than the diameter of the separator riser 9, so that the rotating and inertial separation process is realized; the liquid drops which do not enter the separator exhaust pipe 12 are converged on the upper top plate 10 of the spiral lifting plate, after a certain amount of pressure difference between the upper separation space 11 of the balanced separator and the separation space 3 of the separator is formed, the liquid drops move to the lower wall surface through the upper separation space liquid discharge groove 14 and move downwards along with the internal and external rotational flow of the separation space 3 of the separator, so that the secondary separation process is realized. According to the process, the special design of the top plate at the upper part of the spiral lifting plate in the gas-liquid separator enables a two-stage separator space to be formed in the single separator, meanwhile, the special design of the upper part separation space liquid discharge groove is adopted, smooth liquid discharge of the two separation spaces is realized, in addition, the liquid on the wall surface can be smoothly discharged from the separator without entering into internal rotational flow due to the fact that an annular cone section outside liquid discharge channel is arranged between the upper part of the cone section of the separator and the wall surface of the separator, and based on the principle, the two-time separation process based on the centrifugal and inertial separation principle in the single separator is formed.
Claims (4)
1. The gas-liquid separator for the open flow of the oil-gas well test is characterized by comprising a spiral type lifting plate (2), wherein a separator gas-liquid inlet (1) is formed in the front end of the spiral type lifting plate (2), a spiral type lifting plate upper top plate (10) is arranged above the spiral type lifting plate (2), a separator riser (9) is arranged in the center of the spiral type lifting plate (2), a separator bottom cone section (5) and a separator liquid outlet (7) are arranged below the spiral type lifting plate (2), and a separator exhaust pipe (12) and a separator purified gas outlet (13) are arranged above the spiral type lifting plate (2); an upper separation space (11) of the separator is arranged between the upper top plate (10) of the spiral lifting plate and the separator exhaust pipe (12);
the diameter of the separator exhaust pipe (12) is smaller than the diameter of the separator riser (9);
6-12 upper separation space liquid discharging grooves (14) are uniformly distributed on the upper edge of the upper top plate (10) of the spiral lifting plate along the circumferential direction.
2. The gas-liquid separator for open flow testing of oil and gas wells according to claim 1, wherein a separator separation space (3) is arranged between the separator riser (9) and the separator bottom cone section (5); the lower end of the separator bottom cone section (5) is provided with a separator cone section liquid outlet (8), and a separator lower liquid drop sedimentation space (6) is arranged between the separator bottom cone section (5) and the separator liquid outlet (7).
3. The gas-liquid separator for oil-gas well testing blowout according to claim 1 or 2, which is characterized in that the slit width of the upper separation space liquid discharge groove (14) is 2-10 mm, and the length is 5-25 mm; an annular cone section outside liquid discharge channel (15) is arranged between the upper part of the cone section (5) at the bottom of the separator and the wall surface (4) of the separator.
4. The gas-liquid separator for oil-gas well testing blowout according to claim 1 or 2, which is characterized in that the diameter D2 of the separator riser (9) is between 0.4 and 0.8 of the inner diameter D1 of the separator, and the insertion depth H4 of the separator exhaust pipe (12) is between 0.5 and 1.5 of the height H1 of the separation space (11) on the separator; the diameter D3 of the upper port of the bottom cone section (5) of the separator is between 0.8 and 0.95 of the inner diameter D1 of the separator; the diameter D4 of the separator exhaust pipe (12) is between 0.05 and 0.25 of the inner diameter D1 of the separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610302246.3A CN105999868B (en) | 2016-05-10 | 2016-05-10 | Gas-liquid separator for open flow in oil-gas well test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610302246.3A CN105999868B (en) | 2016-05-10 | 2016-05-10 | Gas-liquid separator for open flow in oil-gas well test |
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| CN105999868A CN105999868A (en) | 2016-10-12 |
| CN105999868B true CN105999868B (en) | 2024-04-19 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107642351A (en) * | 2016-12-01 | 2018-01-30 | 中国石油化工股份有限公司 | Oil and gas well testing open flow gas-liquid separator |
| CN109304061A (en) * | 2017-07-26 | 2019-02-05 | 中国石油化工股份有限公司 | A kind of oil and gas well testing open flow gas-liquid separator |
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