CN112012715A - Well head liquid production degassing metering device - Google Patents
Well head liquid production degassing metering device Download PDFInfo
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- CN112012715A CN112012715A CN202010855475.4A CN202010855475A CN112012715A CN 112012715 A CN112012715 A CN 112012715A CN 202010855475 A CN202010855475 A CN 202010855475A CN 112012715 A CN112012715 A CN 112012715A
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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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- 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
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Abstract
A kind of well head produces the liquid and degasses the metering device, relate to the oil well head metering device field, including degassing trunk road and gas branch, the structure of the degassing trunk road includes the inlet flange, vapour and liquid separator, flow counter and outlet flange, the inlet flange, vapour and liquid separator, flow counter and outlet flange loop through the pipeline to connect in series; the structure of the gas branch comprises a check valve and a demisting device which are sequentially connected in series through a pipeline, the inlet end of the gas branch is connected with the gas outlet of the gas-liquid separator, and the outlet end of the gas branch converges into the degassing main line at the outlet end of the flowmeter. The invention separates and measures the gas in the oil well liquid on line by on-line degassing, which effectively improves the measuring precision.
Description
Technical Field
The invention belongs to the field of oil well wellhead metering devices, and particularly relates to a wellhead produced liquid degassing metering device.
Background
In the production process of an oil field, the flow of liquid produced at the wellhead of the oil well needs to be measured, and at present, the measurement mode is to simply adopt a flowmeter for measurement. The disadvantages of this metering method are: the well head produced liquid often contains reservoir gases such as natural gas, and the gases doped in the produced liquid can affect the metering precision of the produced liquid. Therefore, a wellhead produced liquid degassing metering device is needed to be designed, so that the metering precision of wellhead produced liquid is improved.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a degassing and metering device for wellhead produced liquid.
The technical problem solved by the invention is realized by adopting the following technical scheme: the invention provides a wellhead produced liquid degassing metering device which comprises a degassing main line and a gas branch line, wherein the degassing main line structurally comprises an inlet flange, a gas-liquid separator, a flowmeter and an outlet flange, and the inlet flange, the gas-liquid separator, the flowmeter and the outlet flange are sequentially connected in series through pipelines;
the structure of the gas branch comprises a check valve and a demisting device which are sequentially connected in series through a pipeline, the inlet end of the gas branch is connected with the gas outlet of the gas-liquid separator, and the outlet end of the gas branch converges into the degassing main line at the outlet end of the flowmeter.
As a further technical scheme, the gas-liquid separator comprises an upper shell and a lower shell which are connected through a clamp, a liquid inlet and a liquid outlet of the gas-liquid separator are arranged on the side surface of the lower shell, a gas outlet of the gas-liquid separator is arranged at the top of the upper shell, an inclined plate is arranged inside the lower shell, and an inclined plate is arranged between the liquid inlet and the liquid outlet;
an exhaust mechanism assembly is arranged in the upper shell and comprises a valve body, a valve seat, a large valve core, a small valve core, a first connecting rod, a second connecting rod and a floating plate, wherein the valve body is fixedly arranged in the upper shell, the valve seat is arranged in an installation hole in the valve body and is limited by a threaded pressing sleeve, a spring A is arranged between the valve seat and the valve body, the valve seat always keeps a downward movement trend under the elastic force of the spring A, the large valve core is inserted in the threaded pressing sleeve, the upper end of the large valve core is matched with the valve seat through a conical surface to realize sealing, the small valve core is inserted in the large valve core, and the upper end of the small valve core is matched with the large valve core through the conical surface to;
the bottom of the valve body is provided with a guide rod, the floating plate is sleeved on the guide rod, the edge of the upper side of the floating plate is provided with a sliding seat capable of sliding along the radial direction of the floating plate, one end of the first connecting rod is hinged on the sliding seat, the other end of the first connecting rod is hinged with the guide rod, the lower end of the second connecting rod is hinged in the middle of the first connecting rod, and the other end of the second connecting rod is hinged at the lower end of the small valve core;
the side wall of the big valve core is provided with a radial through hole, a sliding rod capable of freely sliding along the radial direction is arranged in the radial through hole, two ends of the sliding rod are provided with ball heads, and the inner side of the thread pressing sleeve and the outer side of the small valve core are provided with annular grooves which are matched with the ball heads on the sliding rod in shape and have hemispherical cross sections;
the outer side of the upper end of the small valve core is provided with a clamp spring, and the small valve core can pull the large valve core to move downwards through the limiting action of the clamp spring.
As a further technical scheme, a demisting net is filled in a space between the upper side of the valve body and the top of the upper shell.
As a further technical scheme, a floating valve assembly is arranged in the upper shell and structurally comprises a floating valve plate, an upper retaining ring and a lower retaining ring, wherein the upper retaining ring and the lower retaining ring are fixedly arranged on the inner side of the lower end of the upper shell;
the floating valve plate is characterized in that a spring B is arranged between the floating valve plate and the lower retainer ring, the elastic force of the spring B upwards acts on the lower side of the floating valve plate, and the gravity of the floating valve plate, the elastic force of the spring B and the buoyancy of the floating valve plate exerted by well liquid in the gas-liquid separator satisfy the following relations: 1) when the conical surface on the floating valve plate is attached to the conical surface on the lower retaining ring, the elastic force exerted on the floating valve plate by the spring B is smaller than the gravity of the floating valve plate; 2) when the floating valve plate bears the buoyancy of the produced liquid, the sum of the buoyancy and the elastic force applied to the floating valve plate by the spring B can overcome the gravity of the floating valve plate, so that the floating valve plate moves upwards under the action of the buoyancy applied by the produced liquid.
The invention has the beneficial effects that:
1. the invention separates and measures the gas in the oil well liquid on line by on-line degassing, which effectively improves the measuring precision.
2. The invention designs a gas-liquid separator suitable for the working condition of an oil well wellhead, wherein an exhaust mechanism component which is driven by a floating plate and can be opened step by step and closed step by step is arranged in the separator, and the gas-liquid separator can be well suitable for the well conditions with different gas contents by adopting the arrangement.
Drawings
FIG. 1 is a schematic plan view of the present invention;
FIG. 2 is a schematic of the three-dimensional structure of the present invention;
FIG. 3 is a schematic view of a gas-liquid separator;
FIG. 4 is a schematic view of the upper housing and the interior of the upper housing;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
fig. 6 is a schematic structural view of the gas-liquid separator after a float valve assembly is provided therein.
In the figure: 1-inlet flange, 2-floating valve plate, 3-degassing main line, 4-gas-liquid separator, 5-flowmeter, 6-one-way valve, 7-lower baffle ring, 8-demisting device, 9-outlet flange, 10-lower shell, 11-liquid inlet, 12-sloping plate, 13-hoop, 14-upper shell, 15-upper shell, 16-floating plate, 17-slide seat, 18-first connecting rod, 19-second connecting rod, 20-guide rod, 21-valve body, 22-demisting net, 23-gas outlet, 24-small valve core, 25-large valve core, 26-thread pressing sleeve, 27-valve seat, 28-spring A, 29-axial flow passage, 30-slide rod, 31-L-shaped flow passage and 32-annular groove, 33-a snap spring, 35-a gas branch, 36-a liquid outlet, 37-an upper baffle ring, and 38-a spring B.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the present invention comprises a degassing main line 3 and a gas branch 35, wherein the degassing main line 3 is used for separating gas in the produced liquid, and the gas branch 35 is used for removing water mist and oil mist in the gas.
The degassing main line 3 structurally comprises an inlet flange 1, a gas-liquid separator 4, a flowmeter 5 and an outlet flange 8, wherein the inlet flange 1, the gas-liquid separator 4, the flowmeter 5 and the outlet flange 8 are sequentially connected in series through pipelines. In the structure, the gas-liquid separator 4 is a core component, and gas in oil well produced liquid can be separated on line and the liquid amount can be measured independently through the gas-liquid separator 4, so that the measuring precision is effectively improved.
The structure of the gas branch 35 comprises a check valve 6 and a demisting device 8 which are sequentially connected in series through a pipeline, the inlet end of the gas branch 35 is connected with the gas outlet 23 of the gas-liquid separator 4, and the outlet end of the gas branch 35 is converged into the degassing main line 3 at the outlet end of the flowmeter 5. The demister 8 is a functional component commonly used in industrial production, and is commonly used in oil-water separation facilities or various occasions requiring dry gas, which is well known to those skilled in the art and will not be described herein again.
In the present invention, the structure of the gas-liquid separator 4 is the main innovation point, specifically:
in the invention, the structure of the gas-liquid separator 4 comprises an upper shell 15 and a lower shell 10 which are connected through a hoop 13, the hoop 13 is a fastener commonly used at a well head, the structure of the gas-liquid separator generally comprises two semi-rings, and the two semi-rings are spliced into a ring shape and connected together through bolts to form the hoop. The liquid inlet 11 and the liquid outlet 36 of the gas-liquid separator 4 are arranged on the side surface of the lower shell 10, the gas outlet 23 of the gas-liquid separator 4 is arranged on the top of the upper shell 15, and an inclined plate 12 is arranged between the liquid inlet 11 and the liquid outlet 36 in the lower shell 10. In production practice, after the gas in the production fluid reaches the wellhead, a part of the gas is already precipitated from the industry along with the reduction of pressure, and another part of the gas still leaves in the production fluid. After the device is installed, the produced liquid enters the gas-liquid separator 4 from the liquid inlet 11, and after the liquid flow impacts the inclined plate 12, the gas dissociated in the produced liquid is separated out under the impact action.
In order to control the exhaust process of the gas-liquid separator 4, the invention arranges an exhaust mechanism component in the upper shell 15, the exhaust mechanism component is driven by the floating plate 16 and can be opened and closed step by step, and the arrangement can be well adapted to the well conditions with different gas contents. The exhaust mechanism assembly includes a valve body 21, a valve seat 27, a large spool 25, a small spool 24, a first link 18, a second link 19, and a floating plate 16. The valve body 21 is fixedly installed in the upper housing 15, and the specific installation mode can adopt a pin connection mode or a thread connection mode. The valve seat 27 is mounted in a mounting hole in the valve body 21 and is retained by a threaded press sleeve 26. A spring A28 is arranged between the valve seat 27 and the valve body 21, the valve seat 27 always keeps a downward movement trend under the action of the elastic force of a spring A28, and the spring A28 is arranged to enable the valve seat 27 to have a certain movement allowance, so that the large valve core 25 is closed more reliably.
The big valve core 25 is inserted in the thread pressing sleeve 26, the upper end of the big valve core 25 is matched with the valve seat 27 through a conical surface to realize sealing, the small valve core 24 is inserted in the big valve core 25, and the upper end of the small valve core 24 is matched with the big valve core 25 through a conical surface to realize sealing.
A guide rod 20 is arranged at the bottom of the valve body 21, the floating plate 16 is sleeved on the guide rod 20, a sliding seat 17 capable of sliding along the radial direction of the floating plate 16 is arranged at the edge of the upper side of the floating plate 16, one end of the first connecting rod 18 is hinged on the sliding seat 17, the other end of the first connecting rod 18 is hinged with the guide rod 20, the lower end of the second connecting rod 19 is hinged in the middle of the first connecting rod 18, and the other end of the second connecting rod 19 is hinged at the lower end of the small valve core 24;
the outer side of the upper end of the small valve core 24 is provided with a clamp spring 33, and the small valve core 24 can pull the large valve core 25 to move downwards through the limiting effect of the clamp spring 33.
The operation of the exhaust mechanism assembly is as follows:
when the produced liquid does not contain gas, the floating plate 16 is not in the produced liquid, and as the density of the floating plate 16 is smaller than that of the produced liquid, the buoyancy borne by the floating plate 16 can be transmitted to the small valve core 24 through the first connecting rod 18 and the second connecting rod 19, the small valve core 24 can transmit the force to the large valve core 25 after moving to the upper extreme position, and the large valve core 25 is also in a closed state after the large valve core 25 moves to the upper extreme position.
When gas is separated out from the produced liquid, the gas pushes the liquid level in the gas-liquid separator 4 downwards, when the gas reaches a certain amount, the floating plate 16 is exposed out of the produced liquid, the buoyancy borne by the floating plate 16 is smaller and smaller in the process that the liquid level continues to move downwards, when the buoyancy is smaller than the gravity of the floating plate 16, the floating plate 16 starts to move downwards, so that the small valve core 24 moves downwards, and at the moment, the gas can be discharged through a channel in the center of the large valve core 25. When the gas amount is large, the liquid level in the gas-liquid separator 4 will continue to drop, the floating plate 16 continues to descend, and in the process, the small valve core 24 pulls the large valve core 25 to move downwards through the action of the clamp spring 33, so that the large valve core 25 is separated from the valve seat 25, and the gas can be discharged from a channel in the center of the valve seat.
It should be noted that, in the above process, before the small valve core 24 moves to the lower limit position in the large valve core 25, the large valve core 25 is locked by the locking mechanism, and only after the small valve core 24 is completely opened, the large valve core 25 can be opened. Similarly, in the upward movement process of the floating plate 16, the large valve core 25 keeps a locked state before the small valve core 24 is closed, and the large valve core 25 can start to move upward only after the small valve core 24 is closed. The locking process is realized by the following scheme: the side wall of the big valve core 25 is provided with a radial through hole, a sliding rod 30 which can freely slide along the radial direction is arranged in the radial through hole, two ends of the sliding rod 30 are respectively provided with a ball head, and under the action of the ball heads, when two parts locked by the sliding rod 30 have a relative movement trend, the sliding rod 32 has a movement trend of sliding along the radial direction of the big valve core 25. The inner side of the threaded pressing sleeve 26 and the outer side of the small valve core 24 are both provided with annular grooves 32 which are matched with the ball heads on the sliding rod 30 in shape and have hemispherical cross sections. The slide rod 30 has two position states, in the first position state (as shown in fig. 5), the small valve core 24 is located at the upper limit position, one end portion of the slide rod 30 is inserted into the annular groove 32 on the thread pressing sleeve 26, so that the large valve core 25 is locked on the thread pressing sleeve 26, when the slide rod slides to the second position state, the small valve core 24 is located at the lower limit position, the other end portion of the slide rod 30 is inserted into the annular groove 32 on the small valve core 24, so that the small valve core 24 is locked on the large valve core 25, and the locking state between the large valve core 25 and the thread pressing sleeve 26 is released.
As a further technical solution, a space between the upper side of the valve body 21 and the top of the upper housing 15 is filled with a defogging net 22, which is used for removing fog from the gas, and belongs to the conventional technology, and is not described herein again. It should be noted that the volume of the demister net 22 can be enlarged as much as possible without interfering with the movement of the valve seat 27.
As shown in fig. 6, as a further technical solution, a float valve assembly is arranged inside the upper housing 15, and the structure of the float valve assembly includes a float valve plate 2, an upper retainer ring 37 and a lower retainer ring 7, wherein the upper retainer ring 37 and the lower retainer ring 7 are both fixedly mounted on the inner side of the lower end of the upper housing 15, the float valve plate 2 is arranged between the upper retainer ring 37 and the lower retainer ring 7, the outer side of the bottom of the float valve plate 2 and the inner side of the lower retainer ring 7 are respectively provided with a conical surface, and the float valve assembly is closed after the two conical surfaces are attached;
a spring B38 is arranged between the floating valve plate 2 and the lower retainer ring 7, the elastic force of the spring B38 acts on the lower side of the floating valve plate 2 upwards, and the following relations are satisfied among three forces, namely the gravity of the floating valve plate 2, the elastic force of the spring B38, and the buoyancy applied to the floating valve plate 2 by well liquid in the gas-liquid separator: 1) when the conical surface on the floating valve plate 2 is attached to the conical surface on the lower retainer ring 7, the elastic force applied by the spring B38 to the floating valve plate 2 is smaller than the gravity of the floating valve plate 2; 2) when the floating valve plate 2 bears the buoyancy of the produced liquid, the sum of the buoyancy and the elastic force applied to the floating valve plate 2 by the spring B38 can overcome the gravity of the floating valve plate 2, so that the floating valve plate 2 moves upwards under the buoyancy applied by the produced liquid.
Claims (4)
1. The utility model provides a well head liquid production degassing metering device which characterized in that: the device comprises a degassing main line (3) and a gas branch (35), wherein the degassing main line (3) structurally comprises an inlet flange (1), a gas-liquid separator (4), a flowmeter (5) and an outlet flange (8), and the inlet flange (1), the gas-liquid separator (4), the flowmeter (5) and the outlet flange (8) are sequentially connected in series through a pipeline;
the structure of the gas branch (35) comprises a check valve (6) and a demisting device (8) which are sequentially connected in series through a pipeline, the inlet end of the gas branch (35) is connected with the gas outlet (23) of the gas-liquid separator (4), and the outlet end of the gas branch (35) is converged into the degassing main line (3) at the outlet end of the flowmeter (5).
2. A wellhead fluid production degassing metering device as claimed in claim 1, wherein: the gas-liquid separator (4) comprises an upper shell (15) and a lower shell (10), the upper shell and the lower shell are connected through a clamp (13), a liquid inlet (11) and a liquid outlet (36) of the gas-liquid separator (4) are formed in the side face of the lower shell (10), a gas outlet (23) of the gas-liquid separator (4) is formed in the top of the upper shell (15), an inclined plate (12) is arranged inside the lower shell (10), and an inclined plate (12) is arranged between the liquid inlet (11) and the liquid outlet (36);
an exhaust mechanism component is arranged in the upper shell (15), the exhaust mechanism component comprises a valve body (21), a valve seat (27), a large valve core (25), a small valve core (24), a first connecting rod (18), a second connecting rod (19) and a floating plate (16), wherein the valve body (21) is fixedly arranged in the upper shell (15), the valve seat (27) is arranged in a mounting hole on the valve body (21) and is limited by a thread pressing sleeve (26), a spring A (28) is arranged between the valve seat (27) and the valve body (21), the valve seat (27) always keeps a downward movement trend under the elastic force of the spring A (28), the big valve core (25) is inserted in the thread pressing sleeve (26), the upper end of the big valve core (25) is matched with the valve seat (27) through a conical surface to realize sealing, the small valve core (24) is inserted into the large valve core (25), and the upper end of the small valve core (24) is matched with the large valve core (25) through a conical surface to realize sealing;
the bottom of the valve body (21) is provided with a guide rod (20), the floating plate (16) is sleeved on the guide rod (20), the edge of the upper side of the floating plate (16) is provided with a sliding seat (17) capable of sliding along the radial direction of the floating plate (16), one end of the first connecting rod (18) is hinged on the sliding seat (17), the other end of the first connecting rod (18) is hinged with the guide rod (20), the lower end of the second connecting rod (19) is hinged in the middle of the first connecting rod (18), and the other end of the second connecting rod (19) is hinged at the lower end of the small valve core (24);
a radial through hole is processed on the side wall of the big valve core (25), a sliding rod (30) which can freely slide along the radial direction is installed in the radial through hole, ball heads are arranged at two ends of the sliding rod (30), and annular grooves (32) which are matched with the ball heads on the sliding rod (30) in shape and have hemispherical cross sections are arranged on the inner side of the thread pressing sleeve (26) and the outer side of the small valve core (24);
the outer side of the upper end of the small valve core (24) is provided with a clamp spring (33), and the small valve core (24) can pull the large valve core (25) to move downwards through the limiting effect of the clamp spring (33).
3. A wellhead fluid production degassing metering device as claimed in claim 1, wherein: and a demisting net (22) is filled in a space between the upper side of the valve body (21) and the top of the upper shell (15).
4. A wellhead fluid production degassing metering device as claimed in claim 2, wherein: the floating valve assembly is arranged in the upper shell (15), the structure of the floating valve assembly comprises a floating valve plate (2), an upper retaining ring (37) and a lower retaining ring (7), the upper retaining ring (37) and the lower retaining ring (7) are fixedly arranged on the inner side of the lower end of the upper shell (15), the floating valve plate (2) is arranged between the upper retaining ring (37) and the lower retaining ring (7), the outer side of the bottom of the floating valve plate (2) and the inner side of the lower retaining ring (7) are respectively provided with a conical surface, and the floating valve assembly is closed after the two conical surfaces are attached;
be provided with spring B (38) between floating valve plate (2) and lower fender ring (7), the elasticity of spring B (38) upwards acts on the downside of floating valve plate (2), satisfies following relation between three power such as the buoyancy that floating valve plate (2) was applyed to the gravity of floating valve plate (2), the elasticity of spring B (38) and the well liquid in the gas-liquid separator: (1) when the conical surface on the floating valve plate (2) is attached to the conical surface on the lower retaining ring (7), the elastic force applied to the floating valve plate (2) by the spring B (38) is smaller than the gravity of the floating valve plate (2); (2) when the floating valve plate (2) bears the buoyancy of the produced liquid, the sum of the buoyancy and the elastic force applied to the floating valve plate (2) by the spring B (38) can overcome the gravity of the floating valve plate (2) so as to enable the floating valve plate (2) to move upwards under the action of the buoyancy applied by the produced liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010855475.4A CN112012715B (en) | 2020-08-24 | 2020-08-24 | Well head liquid production degassing metering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010855475.4A CN112012715B (en) | 2020-08-24 | 2020-08-24 | Well head liquid production degassing metering device |
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| Publication Number | Publication Date |
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| CN112012715A true CN112012715A (en) | 2020-12-01 |
| CN112012715B CN112012715B (en) | 2021-04-20 |
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| CN202010855475.4A Active CN112012715B (en) | 2020-08-24 | 2020-08-24 | Well head liquid production degassing metering device |
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| CN1696619A (en) * | 2004-05-14 | 2005-11-16 | 寿焕根 | Device for automatic measuring oil and gas |
| CN2851880Y (en) * | 2005-11-15 | 2006-12-27 | 张种田 | Electrically heated liquefied petroleum gas burning device |
| CN2851740Y (en) * | 2005-11-15 | 2006-12-27 | 张种田 | Double linkage lever type floating ball valve |
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| Publication number | Publication date |
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| CN112012715B (en) | 2021-04-20 |
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