CN115900870A - Multi-channel metering flowmeter and metering method - Google Patents
Multi-channel metering flowmeter and metering method Download PDFInfo
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- CN115900870A CN115900870A CN202211728617.6A CN202211728617A CN115900870A CN 115900870 A CN115900870 A CN 115900870A CN 202211728617 A CN202211728617 A CN 202211728617A CN 115900870 A CN115900870 A CN 115900870A
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
Abstract
The invention discloses a multichannel metering flowmeter, which comprises a flow channel seat and a shell wrapped outside the flow channel seat, wherein a plurality of metering channels are arranged in the flow channel seat, two channel interfaces are arranged on the shell and respectively face to two ends of the flow channel seat, two ends of any metering channel are respectively butted with the two channel interfaces and are kept communicated so as to be activated, a switching handle is fixedly connected to the flow channel seat and outwards penetrates out of the shell, a plurality of positioning connecting positions are arranged on the outer wall of the shell and are synchronously activated along with the metering channels, and the switching handle and the activated positioning connecting positions keep relatively fixed connection relation. The notification also discloses a flow metering method. The invention has the obvious effect that the metering channels with different parameters can be automatically switched along with the life cycle of the oil-gas field, so that the metering channels can be matched with different requirements on the metering channels before, during and after exploitation, thereby obviously reducing the production and use cost.
Description
Technical Field
The invention relates to petroleum engineering exploitation equipment, in particular to a metering device for petroleum engineering.
Background
The oil and gas production of the oil and gas well gradually decreases along with the increase of the year in the whole life cycle, and different flow meters are generally required to be configured at different stages for obtaining better production measurement effect, thereby causing the cost to rise.
The essential difference between different flowmeters is that the parameters of the metering channel are different, and it is obviously not economical to replace the flowmeter several times for this reason alone.
Disclosure of Invention
In order to solve the technical problems, the invention provides a flowmeter capable of automatically switching a metering channel in the whole life cycle of an oil-gas well, so that the flowmeter can be simultaneously suitable for the front stage, the middle stage and the later stage of exploitation, thereby obviously reducing the production cost, and adopting the following main technical scheme:
a multichannel metering flowmeter comprises a flow channel seat and a shell wrapped outside the flow channel seat, wherein the inner cavity wall of the shell is matched and attached with the outer wall of the flow channel seat;
the flow channel seat is cylindrical, a plurality of metering channels are arranged in the flow channel seat, two ends of each metering channel respectively penetrate through the flow channel seat, two ends of each metering channel are respectively opened at two end faces of the flow channel seat, the central lines of the metering channels are parallel to the central line of the flow channel seat, and all the metering channels are distributed annularly around the central line of the flow channel seat;
the shell is provided with two channel interfaces which face to two ends of the flow channel seat respectively, two ends of any metering channel are butted with the two channel interfaces respectively and are kept communicated so as to be activated, and a sealing piece is matched at the butt joint position of the metering channel and the channel interfaces;
a switching handle is fixedly connected to the flow channel seat, a position yielding port is formed in the shell, the switching handle penetrates through the position yielding port outwards, and the switching handle can drive the flow channel seat to rotate in the shell so as to enable different metering channels to be communicated with the channel interfaces;
the outer wall of the shell is provided with a plurality of positioning connecting positions, the positioning connecting positions correspond to the metering channels one to one, the positioning connecting positions are activated synchronously along with the metering channels, and the switching handle and the activated positioning connecting positions keep a relatively fixed connecting relation, so that the activated metering channels and the two channel interfaces are kept in a relatively fixed relation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the assembly of the positioning handle 4 on the housing 2;
FIG. 3 is a schematic end view of end cap 22;
FIG. 4 isbase:Sub>A sectional view A-A' of FIG. 3;
FIG. 5 is a top view of FIG. 3;
FIG. 6 is a sectional view taken along line B-B' of FIG. 5;
FIG. 7 is an enlarged view of section i of FIG. 6;
fig. 8 is a perspective view of the flow channel base 1.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
As shown in fig. 1 to 8, a multichannel metering flowmeter includes a flow channel seat 1 and a casing 2 wrapped outside the flow channel seat 1, wherein an inner cavity wall of the casing 2 is matched and attached to an outer wall of the flow channel seat 1;
the flow channel seat 1 is cylindrical, a plurality of metering channels 1a are arranged in the flow channel seat 1, two ends of each metering channel 1a penetrate through the flow channel seat 1 respectively, two ends of each metering channel 1a are opened at end faces of two ends of the flow channel seat 1 respectively, a central line of each metering channel 1a is parallel to a central line of the flow channel seat 1, and all the metering channels 1a are distributed annularly around the central line of the flow channel seat 1; the central line of each metering channel 1a has the same distance to the central line of the flow channel seat 1;
the casing 2 is provided with two channel interfaces 2a, the two channel interfaces 2a face two ends of the flow channel seat 1 respectively, two ends of any metering channel 1a are butted with the two channel interfaces 2a respectively and are kept communicated so as to be activated, a sealing piece is matched at the butt joint position of the metering channel 1a and the channel interfaces 2a, specifically, an annular sealing groove is formed in the end face of each flow channel seat 1 around the opening of the metering channel 1a respectively, and an O-shaped sealing ring is arranged in the annular sealing groove.
The two channel interfaces 2a are respectively connected with a connecting pipe 7, the connecting pipes 7 are welded and fixed with the corresponding channel interfaces 2a, the connecting pipes 7 extend outwards along the axial direction of the activated metering channel 1a, and the free end of each connecting pipe 7 is provided with a butt flange; the butt flange is used for connecting the whole device into a pipeline;
the metering channel 1a comprises a small hole section, two large hole sections and two circular truncated cone transition sections which are connected in a concentric line mode, the small hole section is located between the two large hole sections, two ends of the small hole section are respectively communicated with the two large hole sections through the circular truncated cone transition sections, a large opening end of the circular truncated cone transition section is communicated with the large hole sections, a large opening end of the circular truncated cone transition section is communicated with the small hole sections, one large hole section forms an inlet section, and the other large hole section forms an outlet section;
the number of the metering channels 1a is at least two, and may also be three, four, etc., which is mainly determined according to the requirements, and the specification parameters of each metering channel 1a are inconsistent, more specifically: the diameter of the inlet section of each metering channel 1a is equal; the outlet section of each metering channel 1a has the same diameter; the diameters of the small opening sections of the metering channels 1a are different; the axial lengths of the round table transition sections of the metering channels 1a are different;
a switching handle 3 is fixedly connected to the flow channel seat 1, a position-giving opening is formed in the shell 2, the switching handle 3 penetrates through the position-giving opening outwards, and the switching handle 3 can drive the flow channel seat 1 to rotate in the shell 2 so as to enable different metering channels 1a to be communicated with the channel interfaces 2 a;
the outer wall of the shell 2 is provided with a plurality of positioning connection positions, the positioning connection positions correspond to the metering channels 1a one by one, the positioning connection positions are activated synchronously along with the metering channels 1a, and the switching handle 3 and the activated positioning connection positions keep a relatively fixed connection relation, so that the activated metering channels 1a keep a relatively fixed relation with the two channel interfaces 2 a.
The more optimized technical scheme is as follows: the switching handle 3 is connected to the center position of the end face at either end of the flow channel seat 1, and the switching handle 3 penetrates out of the shell 2 along the center line direction of the flow channel seat 1;
the extending end of the switching handle 3 is connected with a positioning handle 4, a connecting hole is formed in the positioning connecting position, and the positioning handle 4 is connected to the activated positioning connecting position through a bolt;
the positioning handle 4 comprises a handle rod 41, a handle support 42, a movable hoop 43 and a fixed hoop 44, the handle support 42 is fixed at the positioning connection position through bolts, the fixed hoop 44 is fixed on the handle support 42, the movable hoop 43 is connected and tensioned with the fixed hoop 44 through bolts, the handle rod 41 is perpendicular to the switching handle 3, one end of the handle rod 41 is fixedly connected with the switching handle 3, and the other end of the handle rod 41 is fixedly arranged between the movable hoop 43 and the fixed hoop 44 in a penetrating manner.
Two pairs of pressure measuring drainage hole groups 5 are respectively arranged on the flow channel seat 1 corresponding to each metering channel 1a, and the two pairs of pressure measuring drainage hole groups 5 are arranged along the axial direction of the corresponding metering channel 1 a;
the pressure measuring drainage hole group 5 comprises a radial drainage hole 51 and two oblique drainage holes 52, and the radial drainage hole 51 is arranged along the radial direction of the flow channel seat 1;
the central line of the radial drainage hole 51 is perpendicular to and intersects with the central line of the corresponding metering channel 1a, the central line of the oblique drainage hole 52 is perpendicular to and intersects with the central line of the corresponding metering channel 1a, the two oblique drainage holes 52 are axially symmetrically distributed about the radial drainage hole 51, and the radial drainage hole 51 and the two oblique drainage holes 52 are positioned at the same axial position of the corresponding metering channel 1 a; the two oblique drainage holes 52 can balance and stabilize the pressure of fluid discharged from the radial drainage hole 51, and the inner ends of the radial drainage hole 51 and the two oblique drainage holes 52 are respectively communicated with the corresponding metering channels 1 a;
the included angle between the central line of the radial drainage hole 51 and the central line of the oblique drainage hole 52 is 45 degrees;
the outer wall of the flow channel seat 1 is provided with a pressure stabilizing groove 1b corresponding to each pair of the pressure measuring drainage hole groups 5, and the outer ends of the radial drainage holes 51 and the two oblique drainage holes 52 are opened on the bottom surface of the pressure stabilizing groove 1 b;
two pressure leading holes 2b penetrate through the shell 2, the two pressure leading holes 2b correspond to the two pairs of pressure measuring drainage hole groups 5 of the activated metering channel 1a one by one, and the inner ends of the pressure leading holes 2b are communicated with the corresponding pressure stabilizing grooves 1 b;
the pair of pressure measuring drainage hole groups 5 are communicated with the small hole section to form a high-pressure drainage hole group; the other pair of pressure measuring drainage hole groups 5 is communicated with the large hole section positioned at the inlet section to form a low-pressure drainage hole group; the high-pressure drainage hole group of each metering channel 1a is positioned at the same axial position of the flow channel seat 1; the low-pressure drainage hole group of each metering channel 1a is positioned at different axial positions of the flow channel seat 1; therefore, the axial distance L between the two pairs of pressure measuring drainage hole groups 5 is unequal, and the size needs to be noticed when the pressure stabilizing groove 1b is arranged, so that the pressure stabilizing groove 1b of each metering channel 1a can be communicated with the corresponding pressure leading hole 2 b;
the three axial seals are also arranged outside the flow channel seat 1, the three seals are sequentially distributed along the axial direction of the flow channel seat 1 to form a first axial seal, a second axial seal and a third axial seal, the first axial seal is close to the inlet section, the third axial seal is close to the outlet section, and all the low-pressure drainage hole groups are positioned between the first axial seal and the second axial seal; all the high-pressure drainage hole groups are positioned between the second axial seal and the third axial seal;
the pressure stabilizing groove 1b is arc-shaped, the bottom of the pressure stabilizing groove 1b is a plane, the wall of the pressure stabilizing groove 1b is sector-shaped, the extending direction of the bottom of the pressure stabilizing groove 1b is perpendicular to the central line of the runner seat 1, the bottom surface of the pressure stabilizing groove 1b is perpendicular to the central line of the corresponding radial drainage hole 51, and the center of the bottom of the pressure stabilizing groove 1b is located on the central line of the corresponding radial drainage hole 51.
When the device is used for a long time, fluid (particularly crude oil) may seep between the flow channel seat 1 and the shell 2 from the pressure stabilizing groove 1b and flow into other metering channels 1a to be activated, impurities such as sand, asphalt and the like exist in the metering channels 1a to be activated, two cleaning ports 2c can penetrate through the shell 2, the two cleaning ports 2c respectively face to two ends of the flow channel seat 1, the two cleaning ports 2c are respectively in butt joint and communication with two ends of any metering channel 1a to be activated, sealing covers 6 are respectively arranged on the two cleaning ports 2c, and sealing elements are arranged between the sealing covers 6 and the cleaning ports 2 c.
When the metering channel 1a needs to be switched, the sealing cover 6 is opened firstly, the metering channel 1a to be activated is in butt joint with the cleaning port 2c for cleaning, then the sealing cover 6 is plugged, and the metering channel 1a to be activated is switched in place.
The shell 2 comprises a barrel body 21 and an end cover 22, the end cover 22 is buckled at the opening end of the barrel body 21, and the end cover 22 is connected with the opening end of the barrel body 21 through a bolt;
one channel port 2a is arranged on the end cover 22, and the other channel port 2a is arranged at the bottom of the barrel body 21;
one of the cleaning ports 2c is opened in the end cap 22, and the other cleaning port 2c is opened in the bottom of the barrel body 21.
Example 2:
a flow metering method, comprising the steps of:
step one, building the multi-channel metering flowmeter in the embodiment 1, and enabling the central line of the metering channel 1a to be in a vertical state, wherein the lower end of the metering channel 1a is an inlet, and the upper end of the metering channel 1a is an outlet;
step two, the multichannel metering flowmeter is connected into a pipeline, fluid to be measured is introduced into the activated metering channel 1a, the fluid led out from the two pressure leading holes 2b is led to a differential pressure gauge through a pipeline, and the differential pressure Δ p between the two pressure measuring drainage hole groups 5 is measured by the differential pressure gauge;
step three, calculating the static pressure difference delta p between the two groups of pressure measuring drainage hole groups 5 according to the following formula 1 ；
△p 1 ＝ρ*g*h；
ρ is the density of the fluid;
g is the acceleration of gravity;
h is the height difference between the two groups of pressure measuring drainage hole groups 5, and h is equal to the axial distance L between the two pairs of pressure measuring drainage hole groups 5 when the pressure measuring drainage hole groups are vertically placed;
step four, calculating the flow Q of the fluid according to the following formula;
c is an outflow coefficient;
e is a progressive speed coefficient;
d is the diameter of the small pore section;
epsilon is the stream expansion coefficient;
ρ is the density of the fluid.
Has the advantages that: by adopting the technical scheme of the invention, the metering channels with different parameters can be automatically switched along with the life cycle of the oil-gas field, so that the metering channels can be matched with different requirements on the metering channels before, during and after exploitation, and the production and use cost is obviously reduced.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and that those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (9)
1. A multi-channel metering flowmeter characterized by: the flow channel comprises a flow channel seat (1) and a shell (2) wrapped outside the flow channel seat (1), wherein the inner cavity wall of the shell (2) is matched and attached to the outer wall of the flow channel seat (1);
the flow channel seat (1) is cylindrical, a plurality of metering channels (1 a) are arranged in the flow channel seat (1), two ends of each metering channel (1 a) respectively penetrate through the flow channel seat (1), two ends of each metering channel (1 a) are respectively opened at two end faces of the flow channel seat (1), the central lines of the metering channels (1 a) are parallel to the central line of the flow channel seat (1), and all the metering channels (1 a) are distributed annularly around the central line of the flow channel seat (1);
two channel interfaces (2 a) are arranged on the shell (2), the two channel interfaces (2 a) face to two ends of the flow channel seat (1), two ends of any metering channel (1 a) are respectively butted with the two channel interfaces (2 a) and are communicated with the two channel interfaces (2 a) so as to be activated, and a sealing piece is matched at the butted position of the metering channel (1 a) and the channel interfaces (2 a);
a switching handle (3) is fixedly connected to the flow channel seat (1), a yielding port is formed in the shell (2), the switching handle (3) penetrates through the yielding port outwards, and the switching handle (3) can drive the flow channel seat (1) to rotate in the shell (2) so as to enable different metering channels (1 a) to be communicated with the channel interfaces (2 a);
the outer wall of the shell (2) is provided with a plurality of positioning connecting positions, the positioning connecting positions correspond to the metering channels (1 a) one by one, the positioning connecting positions are activated synchronously along with the metering channels (1 a), and the switching handle (3) and the activated positioning connecting positions keep a relatively fixed connecting relation, so that the activated metering channels (1 a) keep a relatively fixed relation with the two channel interfaces (2 a).
2. The multi-channel metering flowmeter of claim 1, wherein: the centre line of each metering channel (1 a) has the same distance to the centre line of the flow channel base (1);
the switching handle (3) is connected to the center position of the end face of any end of the flow channel seat (1), and the switching handle (3) penetrates out of the shell (2) along the direction of the center line of the flow channel seat (1).
3. The multi-channel metering flowmeter of claim 2, characterized by: the extension end of the switching handle (3) is connected with a positioning handle (4), a connecting hole is formed in the positioning connecting position, and the positioning handle (4) is connected to the activated positioning connecting position through a bolt;
location handle (4) are including handle pole (41), handle support (42), activity staple bolt (43) and fixed staple bolt (44), handle support (42) pass through the bolt fastening location hookup location, fixed staple bolt (44) are fixed on handle support (42), activity staple bolt (43) with fixed staple bolt (44) are taut through bolted connection, handle pole (41) with switch handle (3) are perpendicular, the one end of handle pole (41) with switch handle (3) fixed connection, the other end of handle pole (41) is fixed to be worn to establish activity staple bolt (43) with between the fixed staple bolt (44).
4. A multichannel metering flowmeter according to claim 1, 2 or 3, characterized in that: two pairs of pressure measuring drainage hole groups (5) are respectively arranged on the flow channel seat (1) corresponding to each metering channel (1 a), and the two pairs of pressure measuring drainage hole groups (5) are arranged along the axial direction of the corresponding metering channel (1 a);
the pressure measuring drainage hole group (5) comprises a radial drainage hole (51) and two oblique drainage holes (52), and the radial drainage hole (51) is arranged along the radial direction of the flow channel seat (1);
the central line of the radial drainage hole (51) is perpendicular to and intersects with the central line of the corresponding metering channel (1 a), the central line of the oblique drainage hole (52) is perpendicular to and intersects with the central line of the corresponding metering channel (1 a), the two oblique drainage holes (52) are axially symmetrically distributed relative to the radial drainage hole (51), and the radial drainage hole (51) and the two oblique drainage holes (52) are positioned at the same axial position of the corresponding metering channel (1 a);
the inner ends of the radial drainage holes (51) and the two inclined drainage holes (52) are respectively communicated with the corresponding metering channels (1 a);
the included angle between the central line of the radial drainage hole (51) and the central line of the oblique drainage hole (52) is 45 degrees;
a pressure stabilizing groove (1 b) is respectively arranged on the outer wall of the flow channel seat (1) corresponding to each pair of the pressure measuring drainage hole groups (5), and the outer ends of the radial drainage holes (51) and the two oblique drainage holes (52) are respectively opened on the bottom surface of the pressure stabilizing groove (1 b);
two pressure leading holes (2 b) penetrate through the shell (2), the two pressure leading holes (2 b) correspond to the two pairs of pressure measuring drainage hole groups (5) of the activated metering channel (1 a) one by one, and the inner ends of the pressure leading holes (2 b) are communicated with the corresponding pressure stabilizing grooves (1 b);
metering channel (1 a) is including a aperture section and two macropore sections that the common center line is connected, the aperture section is located two between the macropore section, the both ends of aperture section respectively with two macropore section intercommunication, one the macropore section forms the entrance section, another the macropore section forms export section, and is a pair of pressure measurement drainage hole group (5) with aperture section intercommunication, another is right pressure measurement drainage hole group (5) with be located the entrance section the macropore section intercommunication.
5. The multi-channel metering flowmeter of claim 4, characterized by: the pressure stabilizing groove (1 b) is arc-shaped, the groove bottom of the pressure stabilizing groove (1 b) is a plane, the groove wall of the pressure stabilizing groove (1 b) is fan-shaped, the groove bottom extending direction of the pressure stabilizing groove (1 b) is perpendicular to the central line of the flow channel seat (1), the groove bottom surface of the pressure stabilizing groove (1 b) is perpendicular to the central line of the corresponding radial drainage hole (51), and the center of the groove bottom of the pressure stabilizing groove (1 b) is located on the central line of the corresponding radial drainage hole (51).
6. The multi-channel metering flowmeter of claim 1, wherein: two cleaning openings (2 c) are further arranged on the shell (2) in a penetrating mode, the two cleaning openings (2 c) face the two ends of the flow channel seat (1) respectively, the two cleaning openings (2 c) are in butt joint and communicated with the two ends of any metering channel (1 a) to be activated respectively, sealing covers (6) are arranged on the two cleaning openings (2 c) respectively, and sealing pieces are arranged between the sealing covers (6) and the cleaning openings (2 c).
7. The multi-channel metering flowmeter of claim 6, characterized by: the shell (2) comprises a barrel body (21) and an end cover (22), the end cover (22) is buckled at the opening end of the barrel body (21), and the end cover (22) is connected with the opening end of the barrel body (21) through a bolt;
one channel interface (2 a) is arranged on the end cover (22), and the other channel interface (2 a) is arranged at the bottom of the barrel body (21);
one cleaning opening (2 c) is formed in the end cover (22), and the other cleaning opening (2 c) is formed in the bottom of the barrel body (21).
8. The multichannel metering flowmeter of claim 1, 2, 3, 6, or 7, wherein: the two channel interfaces (2 a) are respectively connected with a connecting pipe (7), the connecting pipe (7) extends outwards along the axial direction of the activated metering channel (1 a), and a butt flange is arranged at the free end of the connecting pipe (7).
9. A flow metering method, characterized by the steps of:
step one, building a multichannel metering flowmeter according to claim 5, and enabling the central line of a metering channel (1 a) to be in a vertical state, wherein the lower end of the metering channel (1 a) is an inlet, and the upper end of the metering channel (1 a) is an outlet;
step two, the multichannel metering flowmeter is connected into a pipeline, fluid to be measured is introduced into the activated metering channel (1 a), the fluid led out from the two pressure leading holes (2 b) is led to a differential pressure gauge through a pipeline, and the differential pressure gauge measures the differential pressure delta p between two pressure measuring drainage hole groups (5);
step three, calculating the static pressure difference delta p between the two groups of pressure measuring drainage hole groups (5) according to the following formula 1 ；
△p 1 ＝ρ*g*h；
ρ is the density of the fluid;
g is the acceleration of gravity;
h is the height difference between the two pressure measuring drainage hole groups (5);
step four, calculating the flow Q of the fluid according to the following formula;
c is an outflow coefficient;
e is a progressive speed coefficient;
d is the diameter of the small pore section;
epsilon is the stream expansion coefficient;
ρ is the density of the fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211728617.6A CN115900870A (en) | 2022-12-30 | 2022-12-30 | Multi-channel metering flowmeter and metering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211728617.6A CN115900870A (en) | 2022-12-30 | 2022-12-30 | Multi-channel metering flowmeter and metering method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115900870A true CN115900870A (en) | 2023-04-04 |
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ID=86485967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211728617.6A Pending CN115900870A (en) | 2022-12-30 | 2022-12-30 | Multi-channel metering flowmeter and metering method |
Country Status (1)
| Country | Link |
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| CN (1) | CN115900870A (en) |
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2022
- 2022-12-30 CN CN202211728617.6A patent/CN115900870A/en active Pending
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