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CN105999868A - Gas-liquid separator for testing open flow of oil and gas well - Google Patents

Gas-liquid separator for testing open flow of oil and gas well Download PDF

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Publication number
CN105999868A
CN105999868A CN201610302246.3A CN201610302246A CN105999868A CN 105999868 A CN105999868 A CN 105999868A CN 201610302246 A CN201610302246 A CN 201610302246A CN 105999868 A CN105999868 A CN 105999868A
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China
Prior art keywords
separator
gas
liquid
rotating plate
spiral
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Application number
CN201610302246.3A
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Chinese (zh)
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CN105999868B (en
Inventor
王江云
王娟
冯留海
于安峰
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China University of Petroleum Beijing
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China University of Petroleum Beijing
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B01D45/16Separating 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells

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  • 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 and gas well. The separator comprises a spiral swirling starting plate (2), a separator gas-liquid inlet (1) is formed in the front end of the spiral swirling starting plate (2), a spiral swirling starting plate upper top plate (10), a separator upper separation space (11) and a separator exhaust pipe (12) are arranged above the spiral swirling starting plate (2), a separator separation space (3), a separator bottom conical section (5) and a separator liquid discharging port (7) are arranged below the spiral swirling starting plate (2), a separator gas rising pipe (9) is arranged in the center of the spiral swirling starting plate (2), and a first-stage and second-stage separator communication area is formed. A two-stage gas-liquid separation process in the single separator can be achieved, and communication of liquid channels of the two stages of separation is achieved through a specially-designed partition plate and gap structure; besides, based on the centrifugal and inertial separation principle, the device structure of the gas-liquid separator for testing open flow of the oil and gas well is greatly simplified, and skid mounting miniaturization is achieved.

Description

Oil and gas well testing open flow gas-liquid separator
Technical field
The present invention relates to a kind of oil and gas well testing open flow gas-liquid separator, belong to oil and gas well testing apparatus field in petroleum works.
Background technology
In shale gas gas testing gas production safety vent combustion system is developed, need to develop efficient shale gas gas testing open flow gas-liquid and divide From device.Gas testing process has open flow tolerance and band liquid measure changes greatly, pressure feature greatly, and open flow gas carrying liquid is to follow-up gas testing stream Gauge amount and open flow gas safe combustion all can cause and have a strong impact on.The on-the-spot general gas-liquid gravity separator used mainly by When density (proportion) difference of gas-liquid two-phase realizes gravity suffered by biphase separation, i.e. liquid more than the buoyancy of gas, drop will be from Gas phase settles and is separated.Though gravity separator simple in construction, volume is relatively big, and the time of staying is long, separating effect Poor, need personal monitoring's level condition to control condensate drain, safety and reliability is poor.At present high-efficiency gas reservoir is studied relatively Many for Cyclone Separation Technology, this technology has the advantages that separation efficiency is high, but has more strict requirements to gas flow.? During shale gas gas testing open flow, the pressure in pit shaft gradually discharges, and the pressure in gas-liquid separator is same with the increase of gas production Step increases, and when open flow tolerance is within 500,000 sides, the pressure in separator is in the range of 1.5~3.5MPa.Simultaneously as page Rock gas reservoir feature, open flow initial stage liquid content is relatively big, and tolerance is less;When the condensed liquid of down-hole liquid and the low generation of pressure drop discharges After, down-hole pressure progressively discharges, and tolerance is gradually increased, and liquid content also tends to stable.On the whole, shale gas open flow gas-liquid is divided From difficult point be that the big liquid measure of starting stage separates and the high efficiency separation ability of separator during variable working condition.
Shale gas open flow seasonal epidemic pathogens liquid proportional Changing Pattern is complex, and conventional three-phase separator needs longer residence times, separator Volume is the biggest, and efficiency separator is the highest.Therefore, it is contemplated that returned by the eddy flow of particular design in centrifugal separating device Rotation structure and two-stage separator space, use centrifugation to combine inertial separation mechanism, realizes different gas-liquid work in the confined space Buffering under the conditions of condition and high efficiency separation, and reduce the volume of separator, and realize the two-stage separation process of single separator interior.
Summary of the invention
A kind of oil and gas well testing open flow gas-liquid separator that the present invention relates to, by rotating plate top top board spiral in separator Separator is constituted upper and lower two separator space.Gas-liquid fluid enter after separator can under the effect spirally playing rotating plate, The centrifugal separation processes of Double layer spiral flow structure in the similar cyclone separator formed in the separated space of bottom, and the gas separated for the first time Body carries a small amount of drop and enters secondary separation space, top through center riser, eddy flow and effect of inertia realize again separating, reach Purpose and the simplification target of equipment to high efficiency separation, it is achieved the skid miniaturization of open flow equipment.
The structure of the present invention includes:
1. separator gas-liquid entrance, 2. spiral rotating plate, 3. separator separated space, 4. separator wall, 5. separator Bottom cone section, 6. separator bottom droplet settling space, 7. separator leakage fluid dram, 8. separator cone section leakage fluid dram, 9. point From device riser, the 10. spiral rotating plate top top board that rises, 11. separator top separated spaces, 12. separator exhaustors, 13. Separator purifies gas outlet, 14. top separated space sump pits, apocenosis passage outside 15. cone segments, 16. cone segments bottoms Ring baffle, there is separator gas-liquid entrance 1 the spiral front end playing rotating plate 2, and there is spiral rising the spiral top playing rotating plate 2 Rotating plate top top board 10, there is separator riser 9 at the spiral center playing rotating plate 2, and there is separation the spiral lower section playing rotating plate 2 Device bottom cone section 5 and separator leakage fluid dram 7, the spiral top playing rotating plate 2 has separator exhaustor 12 and separator to purify Gas outlet 13, spiral rising has separator top separated space 11 between rotating plate top top board 10 and separator exhaustor 12, Separator separated space 3, separator bottom cone segments 5 times is had between separator riser 9 and separator bottom cone segments 5 End has separator cone section leakage fluid dram 8, has separator bottom liquid between separator bottom cone segments 5 and separator leakage fluid dram 7 Drip settlement space 6.
The present invention also uses following embodiment:
Separator riser 9 diameter D2 is between 0.4~0.8 of separator internal diameter D1
Separator exhaustor 9 insertion depth H4 is between 0.5~1.5 of separator top separated space 11 height H1
Separator cone section 5 upper port diameter D3 is between 0.8~0.95 of separator internal diameter D1
Separator exhaustor 12 diameter D4 is between 0.05~0.25 of separator internal diameter D1
Spiral rising along the circumferential direction is evenly equipped with 6~12 top separated space sump pits 14 on top board 10 top edge of rotating plate top, The width that cracks is 2~10mm, and length is 5~25mm
Apocenosis passage 15 outside annular cone section is had between separator cone section 5 top and separator wall 4
The oil and gas well testing open flow gas-liquid separator that the present invention provides is based on centrifugation and inertial separation mechanism, has a standing wave The efficient cyclone device of condition of starting building buffer capacity, within it in two separated spaces up and down of particular design, gas-liquid first passes around It is centrifuged separation in the separated space of bottom to be then passed through riser and enter into top separated space, carries out eddy flow and add inertial separation mistake Journey, the drop in the separated space of top converges and to pass through cracking of edge downward along wall at the spiral rotating plate top top board that rises simultaneously Flow to leakage fluid dram through lower part apocenosis passage outside space and cone segments after flowing, by twice separation process achieve based on The centrifugation of density contrast and inertial separation process, can effectively simplify the structure of open flow equipment and realize the skid of open flow equipment Miniaturization.
Accompanying drawing explanation
Fig. 1 is the oil and gas well testing open flow structure of gas liquid separator schematic diagram of the present invention.
In Fig. 1,1. separator gas-liquid entrance, 2. spiral rotating plate, 3. separator separated space, 4. separator wall, 5. separator bottom cone segments, 6. separator bottom droplet settling space, 7. separator leakage fluid dram, 8. separator cone section row Liquid mouth, 9. separator riser, 10. spiral rotating plate top top board, 11. separator top separated spaces, 12. separators Exhaustor, 13. separators purify gas outlet.
Fig. 2 is discharge opeing outside the oil and gas well testing open flow gas-liquid separator top separated space sump pit 14 of the present invention and cone segments Passage 15 and the structural representation of cone segments lower annular baffle plate 16;
In Fig. 2,14. top separated space sump pits, apocenosis passage outside 15. cone segments, 16. cone segments lower annular baffle plates.
Detailed description of the invention
Below in conjunction with the accompanying drawings the oil and gas well testing open flow gas-liquid separator of the present invention is illustrated.
With reference to Fig. 1, oil and gas well testing open flow gas-liquid separator mouth includes 1. separator gas-liquid entrances, 2. spiral rotating plate, 3. separator separated space, 4. separator wall, 5. separator bottom cone segments, 6. separator bottom droplet settling space, 7. separator leakage fluid dram, 8. separator cone section leakage fluid dram, 9. separator riser, 10. spiral rotating plate top top board, 11. separator top separated spaces, 12. separator exhaustors, 13. separators purify gas outlet, 14. top separated spaces Sump pit, apocenosis passage outside 15. cone segments, 16. cone segments lower annular baffle plates, there is separation the spiral front end playing rotating plate 2 Device gas-liquid entrance 1, there are the spiral rotating plate top top board 10 that rises, the spiral center playing rotating plate 2 in the spiral top playing rotating plate 2 Having separator riser 9, there are separator bottom cone segments 5 and separator leakage fluid dram 7 in the spiral lower section playing rotating plate 2, spirally The top playing rotating plate 2 has separator exhaustor 12 and separator to purify gas outlet 13, spiral rotating plate top top board 10 He Have between separator exhaustor 12 separator top separated space 11, separator riser 9 and separator bottom cone segments 5 it Between have separator separated space 3, the lower end of separator bottom cone segments 5 to have separator cone section leakage fluid dram 8, separator bottom Droplet settling space, separator bottom 6 is had between cone segments 5 and separator leakage fluid dram 7.
Separator riser 9 diameter D2 is between 0.4~0.8 of separator internal diameter D1, separator exhaustor 9 insertion depth H4 Between 0.5~1.5 for separator top separated space 11 height H1;Separator cone section 5 upper port diameter D3 is for separating Between 0.8~0.95 of device internal diameter D1;Separator exhaustor 12 diameter D4 is between 0.05~0.25 of separator internal diameter D1.
With reference to Fig. 2, spiral rising along the circumferential direction is evenly equipped with 6~12 top separated spaces on top board 10 top edge of rotating plate top Sump pit 14, the width that cracks is 2~10mm, and length is 5~25mm;Between separator cone section 5 top and separator wall 4 There is apocenosis passage 15 outside annular cone section.
Open flow gas entrained drip is entered in separator spirally plays rotating plate 2 by separator gas-liquid entrance 1 and forms downward spiral Rotary motion, (inside is rigid vortex upstream, and outside is as the criterion to form double-deck strong Swirling Flow structure subsequently in separated space 3 Free vortex downstream), drop to wall motion and moves with the descending separator bottom cone segments 5 that flows under the influence of centrifugal force, Most drop apocenosis passages 15 outside cone segments enter droplet settling space, separator bottom 6, it is achieved initial gross separation and stream The cushioning effect of amount fluctuation;Back up with upstream after drop spins up in separator bottom cone segments 5 with gas on a small quantity Rotary motion in separator riser 9, spins up owing to radius of turn reduces, a small amount of liquid under the influence of centrifugal force to Separator riser 9 inwall moves, and continues to keep rotating diffusion type motion, owing to separator exhaustor 12 is straight with its exit Footpath be less than separator riser 9 diameter, gas-liquid need to carry out in separator top separated space 11 deep camber turn could enter divide In device exhaustor 12, and then realize rotating and inertial separation process;In being introduced into separator exhaustor 12, drop is spirally Rise and converge on rotating plate top top board 10, form a certain amount of back balance separator top separated space 11 and separator separated space 3 After pressure reduction, drop by top separated space sump pit 14 to bottom wall move, with contour stealth in separator separated space 3 to Lower motion, it is achieved secondary separation process.By above-mentioned process it can be seen that owing to gas-liquid separator inner-spiral type rises on rotating plate The particular design of portion's top board defines two-stage separator space in making single separator, use the top of particular design to separate sky simultaneously Between sump pit, it is achieved that the smooth discharge opeing of two separated spaces, have annular between separator cone section top and separator wall in addition Outside cone segments, apocenosis passage also ensure that on wall that liquid can get rid of separator smoothly and do not enters back into inward eddy, based on principles above, Defining single separator interior based on centrifugal and twice separation process of inertial separation principle, therefore the present invention can effectively shorten gas The liquid time of staying, and substitute the use of tradition gas-liquid separator, reduce floor space and the complexity of ground surface works.

Claims (4)

1. an oil and gas well testing open flow gas-liquid separator, it is characterized in that described gas-liquid separator to include spirally and play rotating plate (2), there is separator gas-liquid entrance (1) front end of described spiral rotating plate (2), there is spiral rotating plate top top board (10) the spiral top playing rotating plate (2), there is separator riser (9) at the spiral center playing rotating plate (2), there are separator bottom cone segments (5) and separator leakage fluid dram (7) in the spiral lower section playing rotating plate (2), the spiral top playing rotating plate (2) has separator exhaustor (12) and separator to purify gas outlet (13);Separator top separated space (11) is had between described spiral rotating plate top top board (10) and separator exhaustor (12).
A kind of oil and gas well testing gas-liquid separator, it is characterised in that have separator separated space (3) between described separator riser (9) and separator bottom cone segments (5);The lower end of described separator bottom cone segments (5) has separator cone section leakage fluid dram (8), has droplet settling space, separator bottom (6) between separator bottom cone segments (5) and separator leakage fluid dram (7).
A kind of oil and gas well testing gas-liquid separator the most according to claim 1 or claim 2, it is characterized in that along the circumferential direction being evenly equipped with 6~12 tops separated space sump pit (14) on described spiral rotating plate top top board (10) top edge, the width that cracks is 2~10mm, and length is 5~25mm;Apocenosis passage (15) outside annular cone section are had between described separator cone section (5) top and separator wall (4).
A kind of oil and gas well testing gas-liquid separator the most according to claim 1 or claim 2, it is characterized in that between 0.4~0.8 that diameter D2 is separator internal diameter D1 of described separator riser (9), the insertion depth H4 of separator exhaustor (9) is between 0.5~1.5 of separator top separated space (11) highly H1;Described separator cone section (5) upper port diameter D3 is between 0.8~0.95 of separator internal diameter D1;Between 0.05~0.25 that diameter D4 is separator internal diameter D1 of described separator exhaustor (12).
CN201610302246.3A 2016-05-10 2016-05-10 Gas-liquid separator for open flow in oil-gas well test Active CN105999868B (en)

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Cited By (2)

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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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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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