CN114427413A - Equal-flow equal-dryness steam distributor - Google Patents

Abstract

The invention discloses a steam distributor with equal flow and equal dryness, which comprises a separator, a distributor, an elbow and a flow restrictor, wherein a downstream port of the separator is connected with an upstream port of the distributor; the upstream port of the elbow is a steam inlet, and the downstream port of the elbow is connected with the upstream port of the separator; the downstream ports of the distributor are at least provided with two ports, the downstream ports of the distributor are connected with the upstream ports of the flow restrictor, and the downstream ports of the flow restrictor are communicated to the steam injection well. The invention adopts the steps of separating gas from liquid and then redistributing, takes the steam boiler, the pipe network and the steam injection well as a system, and can automatically adjust the steam flow according to the difference of the steam absorption capacity of the steam injection well, so that the steam flow and the dryness fraction distributed to each steam injection well are the same.

Description

Equal-flow equal-dryness steam distributor

Technical Field

The invention relates to the technical field of heavy oil thermal recovery steam injection, in particular to a constant-flow equal-dryness steam distributor.

Background

Steam injection is one of important means for producing thick oil, wherein the dryness of the injected steam plays an important role in increasing the production of an oil well and improving economic benefits, so that wet saturated steam with higher dryness is required to improve the production effect of the thick oil well in both steam flooding wells and steam stimulation wells. This is easily done in case one well is injected in one boiler. However, in the case of one boiler injecting multiple wells, the requirement may not be met. The reasons are as follows: firstly, in the wet saturated steam conveying process, the uneven distribution of steam and liquid can occur at the place where the main trunk line for conveying wet saturated steam is connected with the branch line going to each steam injection well, and the dryness of the wet saturated steam going to each steam injection well is different due to the phenomenon. And secondly, different oil wells have different geological conditions, the steam injection pressure is high or low, and the steam absorption capacity of the stratum is greatly different, so that the flow and the dryness of wet saturated steam among the steam injection wells are greatly different. The oil well with good steam absorption capacity has low steam injection pressure, high steam injection speed, high dryness of wet saturated steam, large heat absorbed by stratum and good thermal recovery effect. The oil well with poor steam absorption capacity has high steam injection pressure, low steam injection speed, low dryness of wet saturated steam and poor thermal recovery effect. To solve this problem, iso-dryness vapor dispensers have been developed.

Currently available steam distributors can be broadly divided into two broad categories: the first type is a T-shaped steam distributor, namely, two branches are connected to a main line for conveying steam, the two branches and a steam inlet pipeline form a T shape, and each branch can be provided with a flow limiting orifice plate and a regulating valve. The distributor is mainly characterized in that the flow of the two branches is closer, the dryness fraction distribution is more uniform, and the equal dryness fraction distribution cannot be realized when the flow difference of the two branches is larger.

Publication (bulletin) No.: CN203214030U, publication (public notice) day: 2013-09-25 discloses a one-in-two type oil field steam injection equal dryness distributor which comprises a sand setting and disturbing device and a nozzle, wherein the rear end of the sand setting and disturbing device is connected with a T-shaped branch piece, the T-shaped branch piece is divided into two branch pipelines, and the two branch pipelines are connected with the nozzle. The nozzle is a flow-limiting orifice plate or a venturi nozzle. The front end of the sand setting and disturbing device is connected with a front end clamp head through a connecting pipe. The rear end of the nozzle is connected with a rear end clamp head. The nozzle is connected with the two branch pipelines of the T-shaped branch piece through an elbow.

Publication (bulletin) No.: CN103244088B, publication (public notice) day: 2016-12-07 relates to the field of heavy oil thermal recovery, and discloses an equal dryness distributor and a distributing method. The technical principle is that on the basis of the structure of a right-angle tee joint, a conical flow divider is installed on a flow inlet pipe, an equal division partition plate is arranged below the conical flow divider, a plurality of through holes are uniformly distributed on the wall surface of the conical flow divider, and symmetrical half weir flow plates are assembled in a left flow dividing pipe and a right flow dividing pipe. Although the mixing of the wet steam is not required, the symmetry of the wet steam density on the cross section of the pipe is maintained at the lower end of the inflow pipe through the symmetrical structure, so that the wet steam has the same steam dryness in the two branch pipes. Compared with the shunt three-way pipe in the prior art, the shunt three-way pipe has the advantages that: the symmetrical structure is adopted, so that the wet steam maintains the symmetry of the wet steam density on the cross section of the pipe at the lower end of the inflow pipe, and the wet steam has the same steam dryness in the two branch flow pipes.

Publication (bulletin) No.: CN109141545A, publication (public notice) day: 2019-01-04 discloses steam distribution metering equipment, which comprises a cyclone, a first steam branch pipe, a second equal-dryness distributor and a second steam branch pipe, wherein a steam main input pipe is fixed on the side wall of the cyclone, a cyclone steam exhaust pipe is hermetically fixed on one side, away from the steam main input pipe, of the cyclone, the lower end of the cyclone is connected with a condensed water discharge pipe, a rectifier is hermetically fixed on one side, away from the cyclone, of the cyclone steam exhaust pipe, the output end of the rectifier is hermetically and fixedly connected with a spherical compensator, the output end of the spherical compensator is hermetically and fixedly connected with the first equal-dryness distributor, and the first steam branch pipe is hermetically fixed on each of the two output ends of the first equal-dryness distributor. The invention solves the problems that the equal-dryness distribution is difficult to realize, the flow output is indefinite and difficult to adjust, and pollutants in steam easily pollute raw materials by arranging the cyclone, the first equal-dryness distributor, the second equal-dryness distributor, the vortex shedding flowmeter and the critical venturi nozzle.

The patent CN203214030U discloses a one-to-two type oil field steam injection equal dryness distributor, and the patent CN 103244088A discloses an equal dryness distributor and a distribution method. Some devices such as a flow meter, a temperature sensor regulating valve and the like are additionally arranged on each branch, for example, a steam distribution metering device disclosed in patent CN109141545 a. The other is a steam equal dryness distributor with spherical or approximately spherical appearance, which is provided with a steam inlet and a plurality of steam outlets, the axes of the pipelines of the steam outlets are positioned on the same plane, the steam is uniformly mixed in a spherical or approximately spherical container and then is conveyed to a steam injection well from each outlet, and a homogeneous phase device and a regulating valve are additionally arranged at the steam inlet to ensure that the water and the steam are more uniformly mixed. This type of distributor also requires that the flow rate of each branch be the same, that the quality be the same, and that each branch be symmetrical for use by colleagues. The actual situation on site is that the steam absorption capacity of wells is very different, and the realization of the same flow rate is impossible; although some flow regulating valves are additionally arranged at the outlets, the flow regulating valves are manually regulated, and time and labor are wasted. The operation is carried out at high temperature and high pressure, and great potential safety hazard exists.

Publication (bulletin) No.: CN104040256B, publication (public notice) day: 2017-09-08 discloses a separating device comprising a cyclone (1, 20, 30) made of sheet material, the cyclone comprising a plurality of vanes (4) having flow inlet side edges (6) defining an inlet angle (α) and flow outlet side edges (8) defining an opening angle (β). The flow inlet side edge and the flow outlet side edge extend from the central portion (3) to a peripheral edge (9) extending between the end points of the flow inlet edge and the flow outlet edge. The entrance angle is greater than the exit angle. The swirler is made by cutting cut lines in the blank (10), the cut lines defining the peripheral edges, the flow inlet edge and the flow outlet edge of a plurality of vanes (4) of the swirler. The blades are then bent to define an exit angle and an entry angle. Alternatively, the cyclones are stacked with one or more correspondingly cut and curved cyclones to form a single cyclone (20, 30).

Publication (bulletin) No.: CN102251766A, publication (public notice) day: 2011-11-23 discloses a novel pipeline type oil-water separator rotation starting device, which comprises: the guide vanes are more than 2 and can be fixedly and obliquely arranged in the pipeline, are uniformly distributed along the circumferential direction of the pipeline and are sequentially overlapped in the axial direction of the pipeline; when the fluid mixed with oil flows through the flow deflector, a centrosymmetric rotational flow field is formed, so that oil and water are centrifugally separated. The invention has the following effects: when oil and water enter the rotation starting device provided with the oil-water separator in a certain proportion, the oil and water flow enters the flow deflectors, and the flow deflectors are inclined in the same direction in the circumferential direction, so that the flow of the part of the fluid guided by each flow deflector in the annular direction is basically the same, the uniform vortex effect can be achieved, a strong vortex can be formed, and meanwhile, the flow deflectors axially mounted enable the radial movement distance of oil drops to be reduced, and the oil drops can be enabled to move to the axis more quickly. Thus, a good oil-water separation effect can be achieved.

The technical scheme of the disclosed technology, the technical problems to be solved and the beneficial effects are all different from the technical scheme of the invention, or the technical field or the application occasion is different, and no technical inspiration exists in the technical scheme disclosed above.

Disclosure of Invention

The invention aims to provide a steam distributor with equal flow and equal dryness, which aims to overcome the defects in the prior art, adopts a method of separating steam from liquid and then redistributing the steam, uses a steam boiler, a pipe network and a steam injection well as a system, and can automatically adjust the steam flow according to the difference of the steam absorption capacity of the steam injection well so that the steam flow and the dryness distributed to each steam injection well are the same.

In order to achieve the purpose, the invention adopts the following technical scheme:

the equal-flow equal-dryness steam distributor comprises a separator, a distributor, an elbow and a flow restrictor, wherein a downstream port of the separator is connected with an upstream port of the distributor;

the upstream port of the elbow is a steam inlet, and the downstream port of the elbow is connected with the upstream port of the separator;

the downstream ports of the distributor are at least provided with two ports, the downstream ports of the distributor are connected with the upstream ports of the flow restrictor, and the downstream ports of the flow restrictor are communicated to the steam injection well.

Further, the dispenser includes:

the main body is internally provided with two or more liquid flow channels with the same structure, a cavity in the main body positioned in the upstream direction of the liquid flow channels is used as a steam-water separation chamber, the main body is also provided with radial outlets, the radial outlets are downstream ports of the distributor, the number of the radial outlets is consistent with that of the liquid flow channels, and the radial outlets are correspondingly communicated in pairs;

the partition plate is fixed in the steam-water separation chamber, the steam-water separation chamber is divided into two or more single chambers with the same size, the number of the single chambers is consistent with that of the liquid flow channels, the single chambers are correspondingly communicated in pairs one by one, and the steam-water separation chamber is communicated with the upstream port of the distributor.

Further, the flow restrictor comprises:

the flow restrictor comprises a flow restrictor shell, wherein an integrated flow passing plate is arranged in the flow restrictor shell, a flow passing channel is formed in the flow passing plate, an inner cavity of the shell in the upstream direction of the flow passing plate is a conical flow channel, and an upstream port of the shell is connected with a downstream port of the distributor;

the rear end of the centering rod is mounted in a centering rod mounting hole formed in the flow-crossing plate, the centering rod is sleeved with a spring, the front end of the centering rod is further sleeved with a floating ring, the front end of the spring is connected with the floating ring, the rear end of the spring is connected with the flow-crossing plate, the centering rod and the floating ring are both positioned in the conical flow channel, the space section between the outer wall of the floating ring and the inner wall of the conical flow channel is used as an overflowing sectional area, and the overflowing sectional area is changed in real time along with the sliding of the floating ring on the centering rod.

Further, the flow restrictor comprises:

the center of the working barrel is provided with an integrated reducing plate, the center of the reducing plate is provided with a tapered hole, the front end port of the tapered hole is a small-diameter port, the rear end port of the tapered hole is a large-diameter port, the tapered hole is used as a diffusion hole, and the front end port of the working barrel, namely an upstream end port, is connected with a downstream end port of the distributor;

the edge of the upstream support is fixed at an upstream port of the working barrel, and a rear central circular hole is formed in the center of the rear end face of the upstream support;

the edge of the downstream support is fixed at a downstream port of the working barrel, and a front central circular hole is formed in the center of the front end face of the downstream support;

the front end of the guide rod is arranged in a rear central circular hole of the rear end surface of the upstream bracket, the rear end of the guide rod is arranged in a front central circular hole of the front end surface of the downstream bracket, and a spring is sleeved on the guide rod;

the outer wall of the floater is a conical surface, the floater is provided with a center hole and sleeved on the guide rod, the rear end of the floater extends into the conical hole, the maximum outer diameter of the outer wall of the floater is smaller than the inner diameter of the working barrel, the front end of the spring is connected with the rear end face of the floater, the rear end of the spring is connected with the downstream support, the space section between the outer wall of the floater and the inner wall of the conical hole is used as an overflowing sectional area, and the overflowing sectional area also changes in real time along with the sliding of the floater on the guide rod.

Furthermore, the edge of the upstream support is fixed in an upper clamping groove formed in an upstream port of the working barrel, and the edge of the downstream support is fixed in a lower clamping groove formed in a downstream port of the working barrel.

Further, the separator is a cyclone separator.

Further, the cyclone separator comprises:

the separator shell is a tubular body, an upstream port of the separator is welded with a downstream port of the elbow, and a downstream port of the separator is welded with an upstream port of the distributor;

a swirler assembly mounted inside the separator housing.

Further, the swirler assembly includes:

the inner edge of the first blade is a straight edge, the outer edge of the first blade is an arc edge, and the arc edge of the first blade is welded with the inner wall of the separator shell;

the inner edge of the second blade is a straight edge, the outer edge of the second blade is an arc edge, the arc edge of the second blade is welded with the inner wall of the separator shell, and the central point of the straight edge of the second blade is welded with the central point of the straight edge of the first blade;

the inner edge of the third blade is a straight edge, the outer edge of the third blade is an arc edge, the arc edge of the third blade is welded with the inner wall of the separator shell, and the central point of the straight edge of the third blade is welded with the central point of the straight edge of the first blade;

the first blade, the second blade and the third blade are not mutually positioned on the same plane.

Further, the elbow is a right-angle elbow.

Compared with the prior art, the invention has the following beneficial effects:

(1) the invention provides an equal-flow equal-dryness steam distribution regulator, which is different from the prior mixed phase redistribution mode. Compared with the existing equal-dryness distributor, the distributor has the characteristics of small occupied area, uniform dryness and flow distribution and the like, is low in cost, and is beneficial to large-area popularization and application.

(2) The invention provides a steam-water separation structure. The semi-circular blades forming a certain angle with each other are matched with the cylindrical inner hole to form a spiral channel, when wet saturated steam flows through, linear flow is changed into rotary flow, moisture in the wet saturated steam flows close to the pipe wall due to high density, and steam in the wet saturated steam flows in the middle of the pipe due to low density, so that the steam and the water are separated. Compact structure and small occupied space.

(3) The invention provides a flow distribution mechanism which can divide wet saturated steam passing through a steam-water separator into a plurality of equal parts to realize uniform distribution of steam dryness.

(4) The invention provides two automatic flow regulating mechanisms which are arranged at the outlets of all branches and can automatically regulate according to the steam suction capacity of a steam injection well, so that the flow of all branches is the same.

Drawings

FIG. 1a is a schematic diagram of a two-in-one structure of an equal flow equal dryness steam distributor according to the present invention;

FIG. 1b is a schematic diagram of a three-in-one structure of an equal flow equal dryness steam distributor according to the present invention;

FIG. 1c is a schematic diagram of a one-to-four structure of an equal flow equal dryness steam distributor according to the present invention;

FIG. 2 is a schematic view of a bend;

FIG. 3a is a top view of the separator;

3 FIG. 33 3b 3 is 3a 3 cross 3- 3 sectional 3 view 3A 3- 3A 3 of 3 FIG. 33 3a 3; 3

FIG. 3c is a perspective view of the separator;

FIG. 4 is a schematic view of a blade configuration;

FIG. 5aa is a top view of the distributor in two parts;

3 FIG. 35 3 ab 3 is 3a 3 cross 3- 3 sectional 3 view 3A 3- 3A 3 of 3 FIG. 35 3 aa 3; 3

FIG. 5ac is a perspective view of the dispenser in halves;

FIG. 5ba is a top plan view of the dispenser in one, three parts;

3 FIG. 35 3 bb 3 is 3a 3 cross 3- 3 sectional 3 view 3A 3- 3A 3 of 3 FIG. 35 3 ba 3; 3

FIG. 5bc is a perspective view of the dispenser in three parts;

FIG. 5ca is a top view of the distributor taken in quarter;

3 FIG. 35 3 cb 3 is 3a 3 cross 3- 3 sectional 3 view 3A 3- 3A 3 of 3 FIG. 35 3 ca 3; 3

FIG. 5cc is a perspective view of the dispenser in quarter;

FIG. 6a is a schematic view of a partition plate in two-in-one configuration;

FIG. 6b is a schematic view of a three-part structure of the separator;

FIG. 6c is a schematic view of a fourth embodiment of the separator;

FIG. 7a is a schematic diagram of a first flow restrictor;

3 FIG. 3 7 3b 3 is 3a 3 cross 3- 3 sectional 3 view 3A 3- 3A 3 of 3 FIG. 3 7 3a 3; 3

FIG. 8a is a schematic view of a second flow restrictor configuration;

3 FIG. 3 8 3b 3 is 3a 3 cross 3- 3 sectional 3 view 3A 3- 3A 3 of 3 FIG. 3 8 3a 3; 3

FIG. 9 is a schematic view of the construction of the mandrel;

FIG. 10 is a schematic view of the float configuration;

FIG. 11 is a schematic view of an upstream stent configuration;

FIG. 12 is a schematic representation of a downstream stent structure.

In the figure: 1. bending the pipe; 2. a separator; 3. a dispenser; 4. a distributor 5. a distributor; 6. a current limiter; 7. welding seams;

21. a housing; 22. a first blade; 23. a second blade; 24. a third blade; 25. a first swirling flow channel; 26. a second swirling flow channel; 27. a third cyclone channel;

31. a main body; 32. a steam-water separation chamber; 33. a partition plate; 34. a first liquid flow channel; 35 a second flow channel;

41. a main body; 42. a steam-water separation chamber; 43. a partition plate; 44. a first liquid flow channel; 45. a second liquid flow channel; 46. a third liquid flow channel;

51. a main body; 52. a steam-water separation chamber; 53. a partition plate; 54. a first liquid flow channel; 55. a second liquid flow channel; 56. a third liquid flow channel; 57. a fourth liquid flow channel;

61. a housing; 62. a floating ring; 63. a righting rod; 64. a spring; 65. a conical flow passage; 66. a righting rod mounting hole;

6A1. upstream scaffold; 6A2. a float; 6A3. working barrel; 6A4. guide rod; 6A5. guide rod; 6A6. downstream scaffold;

6A31. upper card slot; 6A32. round hole; 6A33. diffusion holes; 6A34. lower card slot;

6A11. round hole; 6A61. round hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

referring to all drawings, the invention provides one of the technical solutions:

the equal-flow equal-quality steam distributor comprises a separator 2 and a distributor, wherein a downstream port of the separator is connected with an upstream port of the distributor, and the equal-flow equal-quality steam distributor also comprises an elbow 1 and a flow restrictor 6; the distributor can be a distributor 3 which is divided into two parts, a distributor 4 which is divided into three parts, a distributor 5 which is divided into four parts, and the like, and the number of branches is not limited.

The upstream port of the elbow 1 is a steam inlet, and the downstream port of the elbow is connected with the upstream port of the separator;

the downstream ports of the distributor are at least provided with two ports, the downstream ports of the distributor are connected with the upstream ports of the flow restrictor, and the downstream ports of the flow restrictor are communicated to the steam injection well.

Further, the dispenser includes:

the main body is internally provided with two or more liquid flow channels with the same structure, a cavity in the main body positioned in the upstream direction of the liquid flow channels is used as a steam-water separation chamber, the main body is also provided with radial outlets, the radial outlets are downstream ports of the distributor, the number of the radial outlets is consistent with that of the liquid flow channels, and the radial outlets are correspondingly communicated in pairs;

the partition plate is fixed in the steam-water separation chamber, the steam-water separation chamber is divided into two or more single chambers with the same size, the number of the single chambers is consistent with that of the liquid flow channels, the single chambers are correspondingly communicated in pairs one by one, and the steam-water separation chamber is communicated with the upstream port of the distributor.

The above description of the dispenser includes the implementation structures contained in the following drawings, fig. 5aa is a top view of the dispenser in two parts; 3 FIG. 35 3 ab 3 is 3a 3 cross 3- 3 sectional 3 view 3A 3- 3A 3 of 3 FIG. 35 3 aa 3; 3 FIG. 5ac is a perspective view of the dispenser in halves; FIG. 5ba is a top plan view of the dispenser in one, three parts; 3 FIG. 35 3 bb 3 is 3a 3 cross 3- 3 sectional 3 view 3A 3- 3A 3 of 3 FIG. 35 3 ba 3; 3 FIG. 5bc is a perspective view of the dispenser in three parts; FIG. 5ca is a top view of the distributor taken in quarter; 3 FIG. 35 3 cb 3 is 3a 3 cross 3- 3 sectional 3 view 3A 3- 3A 3 of 3 FIG. 35 3 ca 3; 3 FIG. 5cc is a perspective view of the dispenser in quarter; FIG. 6a is a schematic view of a partition plate in two-in-one configuration; FIG. 6b is a schematic view of a three-part structure of the separator; FIG. 6c is a schematic view of a fourth embodiment of the separator; of course, the above is only a common structure diagram, and the structures are similar and are not described in detail one by one, and meanwhile, more branch type structures are still within the protection scope of the present invention.

Further, the flow restrictor comprises:

the flow restrictor comprises a flow restrictor shell 61, wherein an integrated flow passing plate is arranged in the flow restrictor shell, a flow passing channel 67 is formed in the flow passing plate, an inner cavity of the shell in the upstream direction of the flow passing plate is a conical flow channel 65, and an upstream port of the shell is connected with a downstream port of the distributor;

the rear end of the centralizing rod is arranged in a centralizing rod mounting hole 66 formed in the flow-passing plate, the centralizing rod is sleeved with a spring 64, the front end of the centralizing rod is further sleeved with a floating ring 62, the front end of the spring is connected with the floating ring, the rear end of the spring is connected with the flow-passing plate, the centralizing rod and the floating ring are both positioned in the conical flow channel, the space section between the outer wall of the floating ring and the inner wall of the conical flow channel is used as the flow-passing sectional area, and the flow-passing sectional area is changed in real time along with the sliding of the floating ring on the centralizing rod.

Further, the separator is a cyclone separator. The cyclone separator comprises:

a separator housing 21, the separator housing being a tubular body, an upstream port of the separator being welded to a downstream port of the elbow, the downstream port of the separator being welded to an upstream port of the distributor;

a swirler assembly mounted inside the separator housing.

Further, the swirler assembly includes:

the inner edge of the first blade is a straight edge, the outer edge of the first blade is an arc edge, and the arc edge of the first blade is welded with the inner wall of the separator shell;

the inner edge of the second blade is a straight edge, the outer edge of the second blade is an arc edge, the arc edge of the second blade is welded with the inner wall of the separator shell, and the central point of the straight edge of the second blade is welded with the central point of the straight edge of the first blade;

the inner edge of the third blade is a straight edge, the outer edge of the third blade is an arc edge, the arc edge of the third blade is welded with the inner wall of the separator shell, and the central point of the straight edge of the third blade is welded with the central point of the straight edge of the first blade;

the first blade, the second blade and the third blade are not mutually positioned on the same plane.

The separator is known in the art and can be applied directly, such as the public (public) number: CN104040256B, publication (public notice) day: 2017-09-08 discloses a separation device; another example is publication (bulletin) No.: CN102251766A, publication (public notice) day: 2011-11-23 discloses a novel pipeline type oil-water separator rotation starting device and the like.

Further, the elbow is a right-angle elbow.

The invention provides a flow equal dryness steam distribution regulator, which comprises: the elbow, the steam-water separator, the distributor and the current limiter, wherein welding grooves are reserved at the front end of the elbow and the tail end of the current limiter and are used for welding with other pipelines, and of course, other connection modes such as flanges, hoops and the like can also be used.

The elbow is an elbow with an inlet and an outlet at an angle of 90 degrees and is used for changing horizontally flowing wet saturated steam into vertically flowing steam and eliminating the influence of gravity on the separation effect of the steam-water separator.

The steam-water separator comprises a shell and a plurality of separating blades, wherein the shell is a section of cylindrical short pipe, the separating blades are approximate semicircular sheets and are arranged in the shell and form a certain angle with the axis of the shell, the blades are arranged around the axis of the shell and form a certain angle with each other, a plurality of spiral channels are formed between the blades forming a certain angle with each other and the inner surface of the shell, and when wet saturated steam passes through the spiral channels, the wet saturated steam flowing in a straight line is changed into rotary flow. Due to the action of centrifugal force, moisture in the wet saturated steam flows along the inner wall of the separator due to high density, and the water steam flows along the central part of the separator due to low density, so that the steam and the liquid are separated.

The distributor is a cylinder, the outer diameter of the distributor is the same as that of the separator, a large round hole with one end of the same as the inner diameter of the separator shell is drilled at the lower end of the distributor, a plurality of small round holes with the same diameter are drilled on the surface of the round hole and lead to the outer surface of the separator, partition plates with the same number as that of the small round holes are arranged in the large round hole, and the partition plates are arranged along the radial direction from the axis of the large round hole. The circular hole is divided into equal parts which are the same as the small circular holes, when the separated steam and liquid pass through the partition plate, the number of the separated steam and liquid is the same as that of the small circular holes, and the dryness and the flow rate of each equal part are the same because the steam and the liquid are separated. The upper end surface of the distributor is a blind hole.

The first flow restrictor comprises an outer tube, a righting rod, a spring and a floating ring. The outer pipe is a cylinder, the inner diameter of the outer pipe is the same as that of the small round hole on the outer circle of the distributor, the left end of the outer pipe is provided with a section of conical round hole, the right end of the outer pipe is provided with a section of round hole, the middle of the outer pipe is provided with a baffle plate, the center line of the baffle plate is provided with the small round hole, and the periphery of the baffle plate is provided with a liquid flow channel; the righting rod is a cylindrical rod, the left end of the righting rod is provided with a step, the right end of the righting rod is provided with a section of thread, and the righting rod is screwed on a circular hole in the central line of the outer pipe partition plate; the floating ring is a cylinder, the middle of the floating ring is provided with a through hole, and the floating ring penetrates through the left end of the righting rod; the spring is sleeved on the righting rod and is arranged at the right end of the floating ring.

Separator, referring to fig. 3a, 3b, 3c and 4, the vane 22 is first installed in the inner hole of the casing 21 with the circular arc portion adjacent to the inner wall of the casing 21 and with the vane 22 at an angle of 45 ° to the inner hole axis of the casing 21 (the angle of the vane to the inner hole axis of the casing is between 30 ° and 60 °), and then the vane 22 and the casing 21 are welded together. Next, the vane 23 is installed in the casing 21 with the circular arc portion being adjacent to the inner wall of the casing 21 and the straight portion being opposite to the straight portion of the vane 22, the apex of the vane 23 being on the same circumference and at an angle of 120 ° with the apex of the vane 22, the vane 23 being at an angle of 45 ° with the axis of the hole 21 in the casing, and next, the vane 23 and the casing 21 are welded together. Similarly, blade 24 is inserted into the inner hole of casing 21, the arc portion is adjacent to the inner wall of casing 21, and blade 24 is at 45 ° angle to the inner hole axis of casing 21, and the top point of blade 24 is at 120 ° angle to blade 23 on the same circle with the top points of blades 22 and 23. And then welded to the outer shell 21, completing the separator 2.

The distributor, referring to fig. 1b and fig. 5ba, fig. 5ba and fig. 6b, is installed with a partition plate 43 into a vapor-liquid separation chamber 42 of a main body 41, and three branches of the partition plate 43 separate three liquid flow passages 44, 45 and 46 on the main body 41, and then are welded with the main body 41. The outer circle of the baffle plate is coaxial with the axis of the vapor-liquid separation chamber 42.

In the first flow restrictor, referring to fig. 7a and 7b, a floating ring 62 and a spring 64 are sequentially threaded onto a centering rod 63, and then are installed in a conical flow passage 65 of a housing 61, and one end of the centering rod 63 is screwed onto a centering rod installation hole 66 on the housing 61.

Referring to fig. 1b, the elbow 1, the separator 2 and the distributor 4 are welded together in sequence, and finally the large end of the conical flow channel 65 of the flow restrictor 6 (or the upstream leg end of the flow restrictor a) is welded to the outlets of the flow channels 44, 45 and 46 of the distributor 4, respectively.

The technical principle adopted by the invention is as follows: the wet saturated steam enters the separator 2 from one end of the elbow 1, the cyclone channels 25, 26 and 27 are arranged in the separator 2, the entering wet saturated steam is changed into rotary flow from linear flow, the rotary wet saturated steam enters the steam-liquid separation chamber 42 of the distributor 4, due to the action of centrifugal force, moisture in the wet saturated steam flows along the inner wall of the steam-liquid separation chamber 42 due to high density, the steam flows along the center of the steam-liquid separation chamber 42 due to low density, and steam and liquid are separated. When the wet saturated steam of vapor-liquid separation meets the partition plate 43, the wet saturated steam is divided into three equal parts and enters the liquid flow channels 44, 45 and 46 respectively. The flow and the dryness of the saturated wet steam which is divided into three equal parts are the same.

The equally divided wet saturated steam enters the conical flow channel 65 of the flow restrictor 6 along the flow channels 44, 45 and 46, a throttling pressure difference is generated at the floating ring 62, the acting force of the pressure difference on the floating ring 62 pushes the floating ring 6 to compress the spring 64 and move along the righting rod 63 in the conical flow channel 65, the overflowing area of the wet saturated steam is changed, and when the force generated by the throttling pressure difference is equal to the acting force of the spring 64, the system is in a stable state; in a well section with strong formation steam absorption capacity, the flow rate of wet saturated steam passing through the floating ring 62 is large, the generated pressure difference is also large, the spring 64 is compressed, the flow area of the wet saturated steam is reduced, and the steam flow is reduced accordingly. When the force generated by the throttle pressure differential is the same as the force of spring 64, the system is in a steady state. And vice versa. By adjusting in this way, the flow rate of the wet saturated steam passing through each flow restrictor 6 is equal, the flow rate and the dryness entering each steam injection well are the same through the equal dryness distribution of the distributor 4 and the flow rate adjustment of the flow restrictor 6, the equal flow rate and the equal dryness distribution of the wet saturated steam are realized, and the automatic adjustment is realized.

The equal-flow equal-dryness steam distributor provided by the invention has the advantages that a steam boiler, a steam main trunk line, each branch and each steam injection well are regarded as a pressure system, the pressure systems are mutually influenced and can be automatically adjusted, and the dryness and the flow of the steam entering an oil layer by each branch are basically the same.

Example 2:

referring to all drawings, the invention provides one of the technical solutions:

on the basis of embodiment 1, the second structure of the flow restrictor is adopted, and the second flow restrictor comprises an upstream support, a float, a working cylinder, a guide rod, a spring and a downstream support. The upstream bracket and the downstream bracket are both cross-shaped, a section of cylinder protrudes out of the center part, a section of round hole is arranged in the cylinder, and the diameter of the round hole is slightly larger than the outer diameter of the guide rod; the two ends of the floater are cylinders, the middle of the floater is a cone, a through hole is formed in the floater, and the inner diameter of the through hole is slightly larger than that of the guide rod; the guide rod is a section of cylinder; the spring is a common spiral spring; the working barrel is a cylinder, two ends of the working barrel are respectively provided with 4 clamping grooves matched with the upstream and downstream supports, the middle of the working barrel is provided with a throttling orifice structure, and the throttling orifice structure is matched with the floater to achieve the purpose of adjusting the flow.

The flow restrictor includes:

the working barrel 6A3 is characterized in that an integrated reducing plate is arranged in the center of the working barrel, a tapered hole is formed in the center of the reducing plate, the front end opening of the tapered hole is a small-diameter opening, the rear end opening of the tapered hole is a large-diameter opening, the tapered hole is used as a diffusion hole, and the front end opening, namely an upstream end opening, of the working barrel is connected with a downstream end opening of the distributor;

the edge of the upstream support is fixed at an upstream port of the working barrel, and a rear central circular hole is formed in the center of the rear end face of the upstream support;

the edge of the downstream support is fixed at a downstream port of the working barrel, and a front central circular hole is formed in the center of the front end face of the downstream support;

the front end of the guide rod is arranged in a rear central circular hole of the rear end surface of the upstream bracket, the rear end of the guide rod is arranged in a front central circular hole of the front end surface of the downstream bracket, and the guide rod is sleeved with a spring 6A 5;

the floater 6A2 is characterized in that the outer wall of the floater is a conical surface, the floater is provided with a center hole and sleeved on the guide rod, the rear end of the floater extends into the conical hole, the maximum outer diameter of the outer wall of the floater is smaller than the inner diameter of the working barrel, the front end of the spring is connected with the rear end face of the floater, the rear end of the spring is connected with a downstream support, the cross section of a space between the outer wall of the floater and the inner wall of the conical hole is used as an over-flow sectional area, and the over-flow sectional area changes in real time along with the sliding of the floater on the guide rod.

Further, the edge of the upstream support is fixed in an upper clamping groove 6A31 formed in an upstream port of the working barrel, and the edge of the downstream support is fixed in a lower clamping groove 6A34 formed in a downstream port of the working barrel.

In the second flow restrictor, referring to fig. 8a, 8b and 9, the downstream support 6A6 is placed in the slot 6a34 of the working cylinder 6A3 and welded together, then the guide rod 6a4 is installed in the round hole 6a61 of the downstream support 6A6, then the spring 6a5 and the float 6a2 are sequentially installed, then the guide rod 6a4 is installed in the round hole 6a11 of the upstream support 6a1, and then the upstream support 6a1 is installed in the slot 6a31 of the working cylinder 6A3 and welded together with the working cylinder 6A3.

The use and operating principle of the two restrictors are basically the same.

The equally divided wet saturated steam enters a conical flow channel formed by a flow restrictor 6A floater 6A2 and a round hole 6A32 on the working cylinder along flow channels 44, 45 and 46, a throttling pressure difference is generated at the position of the floater 6A2, the pressure difference exerts force on the floater 6A2 to push the floater 6A2 to compress a spring 6A5 and move along a guide rod 6A4 in the conical flow channel 65, the flow area of the wet saturated steam is changed, and when the force generated by the throttling pressure difference is equal to the acting force of the spring 6A5, the system is in a stable state; in a well section with strong steam absorption capacity of the stratum, the flow rate of the wet saturated steam passing through the floater 6A2 is large, the generated pressure difference is also large, the spring 6A5 is compressed, the flow area of the wet saturated steam is reduced, and the steam flow is reduced accordingly. When the force generated by the throttle pressure difference is the same as the force of or spring 6a5, the system is in steady state. And vice versa. By adjusting in this way, the flow rate of the wet saturated steam passing through each flow restrictor 6A is equal, the flow rate and the dryness entering each steam injection well are the same through the equal dryness distribution of the distributor 4 and the flow rate adjustment of the flow restrictor 6A, the equal flow rate and the equal dryness distribution of the wet saturated steam are realized, and the automatic adjustment is realized.

Of course, the more effective embodiments are the most preferable embodiments, and the less effective embodiments are the basic embodiments, but the basic objects of the invention can be achieved, so all of them are within the protection scope of the present invention.

All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The equal-flow equal-quality steam distributor comprises a separator and a distributor, wherein a downstream port of the separator is connected with an upstream port of the distributor, and the equal-flow equal-quality steam distributor is characterized by further comprising an elbow and a flow restrictor;

the upstream port of the elbow is a steam inlet, and the downstream port of the elbow is connected with the upstream port of the separator;

the downstream ports of the distributor are at least provided with two ports, the downstream ports of the distributor are connected with the upstream ports of the flow restrictor, and the downstream ports of the flow restrictor are communicated to the steam injection well.

2. A constant flow, equal dryness vapor distributor as in claim 1, wherein said distributor comprises:

the main body is internally provided with two or more liquid flow channels with the same structure, a cavity in the main body positioned in the upstream direction of the liquid flow channels is used as a steam-water separation chamber, the main body is also provided with radial outlets, the radial outlets are downstream ports of the distributor, the number of the radial outlets is consistent with that of the liquid flow channels, and the radial outlets are correspondingly communicated in pairs;

the partition plate is fixed in the steam-water separation chamber, the steam-water separation chamber is divided into two or more single chambers with the same size, the number of the single chambers is consistent with that of the liquid flow channels, the single chambers are correspondingly communicated in pairs one by one, and the steam-water separation chamber is communicated with the upstream port of the distributor.

3. A constant flow equal quality steam distributor as claimed in claim 1 or 2 wherein said flow restrictor comprises:

the flow restrictor comprises a flow restrictor shell, wherein an integrated flow passing plate is arranged in the flow restrictor shell, a flow passing channel is formed in the flow passing plate, an inner cavity of the shell in the upstream direction of the flow passing plate is a conical flow channel, and an upstream port of the shell is connected with a downstream port of the distributor;

the rear end of the centering rod is mounted in a centering rod mounting hole formed in the flow-crossing plate, the centering rod is sleeved with a spring, the front end of the centering rod is further sleeved with a floating ring, the front end of the spring is connected with the floating ring, the rear end of the spring is connected with the flow-crossing plate, the centering rod and the floating ring are both positioned in the conical flow channel, the space section between the outer wall of the floating ring and the inner wall of the conical flow channel is used as an overflowing sectional area, and the overflowing sectional area is changed in real time along with the sliding of the floating ring on the centering rod.

4. A constant flow equal quality steam distributor as claimed in claim 1 or 2 wherein said flow restrictor comprises:

the center of the working barrel is provided with an integrated reducing plate, the center of the reducing plate is provided with a tapered hole, the front end port of the tapered hole is a small-diameter port, the rear end port of the tapered hole is a large-diameter port, the tapered hole is used as a diffusion hole, and the front end port of the working barrel, namely an upstream end port, is connected with a downstream end port of the distributor;

the edge of the upstream support is fixed at an upstream port of the working barrel, and a rear central circular hole is formed in the center of the rear end face of the upstream support;

the edge of the downstream support is fixed at a downstream port of the working barrel, and a front central circular hole is formed in the center of the front end face of the downstream support;

the front end of the guide rod is arranged in a rear central circular hole of the rear end surface of the upstream bracket, the rear end of the guide rod is arranged in a front central circular hole of the front end surface of the downstream bracket, and a spring is sleeved on the guide rod;

the outer wall of the floater is a conical surface, the floater is provided with a center hole and sleeved on the guide rod, the rear end of the floater extends into the conical hole, the maximum outer diameter of the outer wall of the floater is smaller than the inner diameter of the working barrel, the front end of the spring is connected with the rear end face of the floater, the rear end of the spring is connected with the downstream support, the space section between the outer wall of the floater and the inner wall of the conical hole is used as an overflowing sectional area, and the overflowing sectional area also changes in real time along with the sliding of the floater on the guide rod.

5. The equal-flow equal-dryness steam distributor according to claim 4, wherein the edge of the upstream support is fixed in an upper clamping groove formed at the upstream port of the working barrel, and the edge of the downstream support is fixed in a lower clamping groove formed at the downstream port of the working barrel.

6. A constant flow, equal quality vapor distributor as claimed in claim 1 or claim 2 wherein said separator is a cyclonic separator.

7. The equal flow and equal quality vapor distributor according to claim 6, wherein the cyclone separator comprises:

the separator shell is a tubular body, an upstream port of the separator is welded with a downstream port of the elbow, and a downstream port of the separator is welded with an upstream port of the distributor;

a swirler assembly mounted inside the separator housing.

8. The equal flow equal dryness vapor distributor of claim 7, wherein the swirl plate assembly comprises:

the inner edge of the first blade is a straight edge, the outer edge of the first blade is an arc edge, and the arc edge of the first blade is welded with the inner wall of the separator shell;

the inner edge of the second blade is a straight edge, the outer edge of the second blade is an arc edge, the arc edge of the second blade is welded with the inner wall of the separator shell, and the central point of the straight edge of the second blade is welded with the central point of the straight edge of the first blade;

the inner edge of the third blade is a straight edge, the outer edge of the third blade is an arc edge, the arc edge of the third blade is welded with the inner wall of the separator shell, and the central point of the straight edge of the third blade is welded with the central point of the straight edge of the first blade;

the first blade, the second blade and the third blade are not mutually positioned on the same plane.

9. A dispenser for equal flow rate of steam of equal quality as claimed in claim 1 or 2 wherein said elbow is a right angle elbow.

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