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

A kind of equal flow equal dryness steam distributor

technical field

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

Background technique

Steam injection is one of the important means to exploit heavy oil, in which the dryness of injected steam plays a very important role in increasing production and improving economic benefits of oil wells. Therefore, both steam flooding wells and steam huff and puff wells require high dryness Wet saturated steam of high degree to improve the recovery effect of heavy oil wells. This is easy to do when a boiler is injected into one well. However, in the case of injecting multiple wells into one boiler, the requirements may not be met. The reasons are as follows: First, in the process of wet saturated steam transportation, uneven distribution of steam and liquid will occur where the main line that transports wet saturated steam is connected to the branch lines that go to each steam injection well. The dryness of the wet saturated steam in each steam injection well is also different. Second, the geological conditions of different oil wells are different, the steam injection pressure is high or low, and the steam absorption capacity of the formation is quite different, resulting in a large difference in the flow rate and dryness of the wet saturated steam between the steam injection wells. Oil wells with good steam absorption capacity have low steam injection pressure, high steam injection speed, high dryness of wet saturated steam, large heat absorption by the formation, and good thermal recovery effect. Oil wells with poor steam absorption capacity have high steam injection pressure, low steam injection rate, low dryness of wet saturated steam, and poor thermal recovery effect. In order to solve this problem, the equal dryness steam distributor has been developed.

At present, the steam distributors in use can be roughly divided into two categories: one is the "T" type steam distributor, which is the main line of steam conveying, and two branches are connected. The two branches and the incoming steam line form a "T" character Type, each branch can add restricting orifice plate and regulating valve. The main feature of this type of distributor is that the closer the flow rates of the two branches are, the more uniform the dryness distribution will be.

Publication (announcement) number: CN203214030U, publication (announcement) date: 2013-09-25 discloses a one-point-two oilfield steam injection and other dryness distributors, including sand settling and disturbance devices, nozzles, and the sand settling and disturbance devices The rear end is connected with a T-shaped branch, two branch pipelines are divided from the T-branch, and nozzles are connected on both branch pipelines. The nozzle is a restrictor orifice or a venturi nozzle. The front end of the sand settling and disturbance 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 to the two branch pipes of the T-shaped branch piece through elbows.

Publication (announcement) number: CN103244088B, publication (announcement) date: 2016-12-07, it relates to the field of thermal recovery of heavy oil, and is an equal dryness distributor and distribution method. The technical principle is that, on the basis of the structure of the right-angle tee, a conical flow divider is installed on the inflow pipe, and an equalizing plate is set under the conical flow divider. holes, and assemble symmetrical half weir plates in the left and right shunt pipes. Although it is not required to mix the wet steam, the symmetrical structure makes the wet steam maintain the symmetry of the wet steam density in the cross section of the pipe at the lower end of the inflow pipe, so that the wet steam has the same value in the two branch pipes of the present invention. Steam dryness. Compared with the shunt three-way pipe in the prior art, the technically beneficial effect is 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, thereby The wet steam is made to have the same steam dryness in the two shunt pipes of the present invention.

Publication (announcement) number: CN109141545A, publication (announcement) date: 2019-01-04 discloses a steam distribution metering device, including a cyclone, a first steam branch pipe, a second equal dryness distributor and a second steam branch pipe , the side wall of the cyclone is fixed with a steam main input pipe, the side of the cyclone away from the steam main input pipe is sealed and fixed with a cyclone steam exhaust pipe, and the lower end of the cyclone is connected with a condensed water drainage pipe. A rectifier is sealed and fixed on the side of the exhaust pipe of the cyclone away from the cyclone, the output end of the rectifier is sealed and fixedly connected with a spherical compensator, and the output end of the spherical compensator is sealed and fixedly connected with a first equal dryness distributor. A first steam branch pipe is sealed and fixed on both output ends of the first-grade dryness distributor. By setting the cyclone, the first equal dryness distributor, the second equal dryness distributor, the vortex flowmeter and the critical venturi nozzle, the invention solves the problem that it is difficult to achieve equal dryness distribution, the flow output is not fixed and difficult to adjust, and the steam Internal pollutants are easy to contaminate raw materials.

Patent CN 203214030 U discloses a one-point two-type oilfield steam injection equal-dryness distributor, and patent CN103244088 A discloses an equal-dryness distributor and a distribution method. Some also install flowmeters, temperature sensor control valves and other devices on each branch, such as patent CN 109141545 A, a steam distribution metering device. The second is a steam equal-dryness distributor with a spherical or nearly spherical appearance. This type of distributor has a steam inlet and multiple steam outlets. The axes of each steam outlet pipeline are located on the same plane, and the steam is in a spherical or approximately spherical container. Mix evenly, and then transport it from each outlet to the steam injection well. Some also add a homogenizer and a regulating valve at the steam inlet to make the water and steam mix more evenly. This type of distributor also requires that the flow of each branch is the same, the dryness is the same, and each branch should be symmetrical, and colleagues use it. The actual situation at the site is that the steam suction capacity of the wells varies widely, and it is impossible to achieve the same flow rate; although some have added a flow control valve at the outlet, they are all manually adjusted, which is time-consuming and labor-intensive. Operating under high temperature and high pressure has great potential safety hazard.

Publication (Announcement) No.: CN104040256B, Publication (Announcement) Date: 2017-09-08 A separation device is disclosed, which includes a cyclone (1, 20, 30) made of a plate, and the cyclone includes a plurality of A vane (4) having a flow inlet side edge (6) defining an inlet angle (α) and a flow outlet side edge (8) defining an outlet 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 point of the flow inlet edge and the end point of the flow outlet edge. The entrance angle is greater than the exit angle. The swirler is made by cutting a cut line in the blank (10), the cut line defining the peripheral edge, the flow inlet edge and the flow outlet edge of the plurality of vanes (4) of the swirler. The vanes are then bent to define outlet and inlet angles. Alternatively, the cyclones are stacked with one or more cyclones that are cut and bent accordingly to form a single cyclone (20, 30).

Publication (announcement) No.: CN102251766A, publication (announcement) date: 2011-11-23 discloses a novel swirling device for a pipeline-type oil-water separator, comprising: more than two guide vanes that can be fixedly and inclinedly installed in the pipeline , the guide vanes are evenly distributed along the circumference of the pipeline, and are stacked in sequence in the axial direction of the pipeline; when the oil-water mixed fluid flows through the guide vane, a centrally symmetric swirl Oil and water are centrifuged. The invention has the following effects: when the oil and water enter the spinning device installed with the oil-water separator in a certain proportion, and encounter the guide vane, since the circumferential direction of the guide vane is inclined in the same direction, the guide vane guides the flow along the annular direction. Part of the fluid flow is basically the same, so a consistent vortex effect can be achieved, and a strong vortex can be formed. At the same time, the axially installed guide vane reduces the radial movement distance of the oil droplet, which can promote the oil droplet to move faster. to the axis. In this way, a good oil-water separation effect can be achieved.

The technical solutions of the above disclosed technology, the technical problems to be solved and the beneficial effects produced are all different from the present invention, or the technical fields or application occasions are different. For more technical features of the present invention, the technical problems to be solved and the beneficial effects, There is no technical inspiration in the above disclosed technical documents.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a kind of equal-flow and equal-dryness steam distributor in view of the above-mentioned defects in the prior art. A system that can automatically adjust the steam flow according to the difference in the steam suction capacity of the steam injection wells, so that the steam flow and dryness distributed to each steam injection well are the same.

In order to achieve the above object, the present invention adopts the following technical solutions:

An equal-flow equal-dryness steam distributor, comprising a separator and a distributor, the downstream port of the separator is connected with the upstream port of the distributor, and also includes 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;

At least two downstream ports of the distributor are opened, and the downstream port of the distributor is connected to the upstream port of the flow restrictor, and the downstream port of the flow restrictor communicates with the steam injection well.

Further, the distributor includes:

The main body has two or more liquid flow channels of the same structure inside the main body, the inner cavity of the main body located in the upstream direction of the liquid flow channel is used as a steam-water separation chamber, and the main body also has a radial outlet, and the radial outlet is the distribution The downstream port of the device, the number of radial outlets is consistent with the number of liquid flow channels, and they are connected in pairs one by one;

The separator is fixed in the steam-water separation chamber, and divides the steam-water separation chamber into two or more single chambers of the same size. Correspondingly, the steam-water separation chamber communicates with the upstream port of the distributor.

Further, the current limiter includes:

The flow restrictor casing is provided with an integrated flow plate inside the flow restrictor casing, and a flow passage is set on the flow plate, and the inner cavity of the casing located in the upstream direction of the flow plate is a conical flow channel. The downstream port connection of the distributor;

Centralizing rod, the rear end of the centralizing rod is installed in the centralizing rod installation hole opened on the flow plate, the centralizing rod is covered with a spring, the front end of the centralizing rod is also covered with a floating ring, the front end of the spring is connected with the floating ring, and the rear end of the spring is connected with the flow plate , the centralizing rod and the floating ring are both located inside the conical flow channel, and the space section between the outer wall of the floating ring and the inner wall of the conical flow channel is used as the cross-sectional area of flow. As the floating ring slides on the centralizing rod, the cross-sectional area of It also changes in real time.

Further, the current limiter includes:

The working cylinder, the center of the working cylinder is provided with an integrated reducing plate, the center of the reducing plate is provided with a conical hole, the front port of the conical hole is a small diameter port, the rear port of the conical hole is a large diameter port, and the conical hole is used as a diffusion hole , the front port of the mandrel, that is, the upstream port, is connected to the downstream port of the distributor;

an upstream support, the edge of the upstream support is fixed on the upstream port of the working cylinder, and the center of the rear end face of the upstream support is provided with a rear central circular hole;

a downstream support, the edge of the downstream support is fixed on the downstream port of the working cylinder, and the center of the front end face of the downstream support is provided with a front central circular hole;

a guide rod, the front end of the guide rod is fitted into the rear central circular hole of the rear end face of the upstream support, the rear end of the guide rod is fitted into the front central circular hole of the front end face of the downstream support, and a spring is sleeved on the guide rod;

The float, the outer wall of the float is a conical surface, the float has a central hole and is sleeved on the guide rod, the rear end of the float extends into the conical hole, the maximum outer diameter of the outer wall of the float is smaller than the inner diameter of the working cylinder, and the front end of the spring is connected to the float The rear end of the spring is connected to the downstream support. The space section between the outer wall of the float and the inner wall of the tapered hole is used as the cross-sectional area of flow. As the float slides on the guide rod, the cross-sectional area of flow changes in real time.

Further, the edge of the upstream bracket is fixed in the upper slot opened at the upstream port of the working cylinder, and the edge of the downstream bracket is fixed in the lower slot opened at the downstream port of the working cylinder.

Further, the separator is a cyclone separator.

Further, the cyclone separator includes:

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

The swirl vane assembly is installed inside the separator housing.

Further, the swirl vane assembly includes:

Blade 1, the inner side of the blade 1 is a straight side, the outer side is a circular arc side, and the circular arc side of the blade 1 is welded with the inner wall of the separator shell;

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

The third blade, the inner edge of the blade three is a straight edge, the outer edge is an arc edge, the arc edge of the blade three is welded with the inner wall of the separator shell, and the center point of the three straight edges of the blade is welded with the center point of the straight edge of the blade;

The first blade, the second blade and the third blade are not on the same plane with each other.

Further, the elbow is a right-angle elbow.

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

(1) The present invention provides a kind of equal flow and equal dryness steam distribution regulator, which is different from the existing method of first miscibility and redistribution. As a system with the steam injection well, it can automatically adjust the steam flow according to the difference in the steam absorption capacity of the steam injection well, so that the steam flow and dryness distributed to each steam injection well are the same. Compared with the existing equal-dryness distributor, it has the characteristics of small footprint, uniform distribution of dryness and flow, and low cost, which is favorable for large-scale popularization and application.

(2) The present invention provides a steam and water separation structure. The semi-circular blades at a certain angle are matched with the cylindrical inner hole to form a spiral channel. When the wet saturated steam flows through, the linear flow is turned into a rotating flow, and the water in the wet saturated steam flows close to the pipe wall due to its high density. , the vapor in the wet saturated steam flows in the middle of the tube due to its low density, thereby separating the steam and water. Compact structure and small footprint.

(3) The present invention provides a flow distribution mechanism, which can divide the wet saturated steam passing through the steam and water separator into several equal parts, so as to realize the uniform distribution of the steam dryness.

(4) The present invention provides two flow rate automatic adjustment mechanisms, which are installed at the outlet of each branch and can be automatically adjusted according to the steam suction capacity of the steam injection well, so that the flow rate of each branch is the same.

Description of drawings

Fig. 1a is a kind of equal flow and equal dryness steam distributor of the present invention.

Fig. 1b is a schematic diagram of one-to-three structure of a kind of equal-flow equal-dryness steam distributor of the present invention;

Fig. 1c is a kind of equal-flow equal-dryness steam distributor of the present invention.

Figure 2 is a schematic diagram of the structure of the elbow;

Figure 3a is a top view of the separator;

Fig. 3b is the A-A sectional view of Fig. 3a;

Figure 3c is a perspective view of the separator;

4 is a schematic diagram of a blade structure;

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

Fig. 5ab is the A-A sectional view of Fig. 5aa;

Figure 5ac is a perspective view of the dispenser in two parts;

Figure 5ba is a top view of the dispenser in three parts;

Fig. 5bb is the A-A sectional view of Fig. 5ba;

Fig. 5bc is a three-dimensional perspective view of the distributor;

Figure 5ca is a top view of the dispenser divided into four parts;

Fig. 5cb is the A-A sectional view of Fig. 5ca;

Figure 5cc is a perspective view of the dispenser divided into four;

Fig. 6a is a schematic diagram of the structure of the partition plate divided into two parts;

Figure 6b is a schematic diagram of a three-part structure of a separator;

Figure 6c is a schematic diagram of a four-part structure of a separator;

Figure 7a is a schematic structural diagram of the first type of current limiter;

Fig. 7b is the A-A sectional view of Fig. 7a;

Figure 8a is a schematic structural diagram of a second type of current limiter;

Fig. 8b is the A-A sectional view of Fig. 8a;

Figure 9 is a schematic view of the structure of the working cylinder;

Figure 10 is a schematic diagram of the structure of the float;

Figure 11 is a schematic diagram of the upstream stent structure;

Figure 12 is a schematic diagram of the downstream stent structure.

In the figure: 1. Elbow; 2. Separator; 3. Distributor; 4. Distributor 5. Distributor; 6. Restrictor; 7. Weld;

21. Shell; 22. Blade one; 23. Blade two; 24. Blade three; 25. Swirl channel one; 26. Swirl channel two; 27. Swirl channel three;

31. Main body; 32. Steam and water separation chamber; 33. Separator; 34. Liquid flow channel one; 35 Liquid flow channel two;

41. Main body; 42. Steam and water separation chamber; 43. Separator; 44. Liquid flow channel one; 45. Liquid flow channel two; 46. Liquid flow channel three;

51. Main body; 52. Steam and water separation chamber; 53. Separator; 54. Liquid flow channel one; 55. Liquid flow channel two; 56. Liquid flow channel three; 57. Liquid flow channel four;

61. Shell; 62. Floating ring; 63. Centralizing rod; 64. Spring; 65. Conical runner; 66. Centralizing rod mounting hole;

6A1. Upstream support; 6A2. Float; 6A3. Mandrel; 6A4. Guide rod; 6A5. Guide rod; 6A6. Downstream support;

6A31. Upper card slot; 6A32. Round hole; 6A33. Diffusion hole; 6A34. Lower card slot;

6A11. Round hole; 6A61. Round hole.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1:

Please refer to all drawings, the present invention provides one of the technical solutions:

An equal-flow equal-dryness steam distributor, including a separator 2, a distributor, the downstream port of the separator is connected to the upstream port of the distributor, and also includes an elbow 1 and a flow restrictor 6; the distributor can be a The distributor 3 is divided into two, the distributor 4 is divided into three, the distributor 5 is divided into four, and so on, and the number of branches is not limited.

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

At least two downstream ports of the distributor are opened, and the downstream port of the distributor is connected to the upstream port of the flow restrictor, and the downstream port of the flow restrictor communicates with the steam injection well.

Further, the distributor includes:

The main body has two or more liquid flow channels of the same structure inside the main body, the inner cavity of the main body located in the upstream direction of the liquid flow channel is used as a steam-water separation chamber, and the main body also has a radial outlet, and the radial outlet is the distribution The downstream port of the device, the number of radial outlets is consistent with the number of liquid flow channels, and they are connected in pairs one by one;

The separator is fixed in the steam-water separation chamber, and divides the steam-water separation chamber into two or more single chambers of the same size. Correspondingly, the steam-water separation chamber communicates with the upstream port of the distributor.

The introduction of the above distributor includes the implementation structure included in the following drawings. Figure 5aa is a top view of the distributor in two parts; Figure 5ab is a cross-sectional view of A-A in Figure 5aa; Figure 5ac is a perspective view of the distributor in two parts; Figure 5ba is a Figure 5bb is a cross-sectional view of A-A of Figure 5ba; Figure 5bc is a perspective view of a distributor of one part and three; Figure 5ca is a top view of a distributor of one part and four; Figure 5cb is a cross-sectional view of A-A of Figure 5ca; Figure 5cc Figure 6a is a schematic diagram of the structure of a partition board divided into two parts; Figure 6b is a schematic diagram of a three-part structure of a partition board; Figure 6c is a schematic diagram of a four-part structure of a partition board; Similarly, detailed descriptions will not be given one by one. Meanwhile, more branch type structures are still within the protection scope of the present invention.

Further, the current limiter includes:

The flow restrictor housing 61 is provided with a flow plate with an integrated structure inside the flow limiter shell, and a flow passage 67 is provided on the flow plate. The upstream port is connected with the downstream port of the distributor;

Centralizing rod 63, the rear end of the centralizing rod is installed in the centralizing rod installation hole 66 opened on the flow plate, the centralizing rod is covered with a spring 64, the front end of the centralizing rod is also covered with a floating ring 62, the front end of the spring is connected to the floating ring, and the rear end of the spring Connect the flow plate, the centralizing rod and the floating ring are located inside the conical flow channel, and the space section between the outer wall of the floating ring and the inner wall of the conical flow channel is used as the cross-sectional area of the flow, and as the floating ring slides on the centralizing rod, The cross-sectional area of the flow also changes in real time.

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

The separator shell 21, the separator shell is a tubular body, the upstream port of the separator is welded with the downstream port of the elbow, and the downstream port of the separator is welded with the upstream port of the distributor;

The swirl vane assembly is installed inside the separator housing.

Further, the swirl vane assembly includes:

Blade one 22, the inner edge of the blade one is a straight edge, the outer edge is an arc edge, and the arc edge of the blade one is welded with the inner wall of the separator shell;

The second blade 23, the inner edge of the second blade is a straight edge, and the outer edge is an arc edge, the arc edge of the second blade is welded with the inner wall of the separator shell, and the center point of the second straight edge of the blade is welded with the center point of the straight edge of the blade ;

Blade three 24, the inner side of the blade three is a straight side, the outer side is a circular arc side, the circular arc side of the blade three is welded with the inner wall of the separator shell, and the center point of the three straight sides of the blade is welded with the center point of the straight side of the blade ;

The first blade, the second blade and the third blade are not on the same plane with each other.

The separator is a known technology in the art and can be directly applied, such as a separation device disclosed in Publication (Announcement) No. CN104040256B, Publication (Announcement) Date: 2017-09-08; another example is Publication (Announcement) No. : CN102251766A, publication (announcement) date: 2011-11-23 discloses a novel pipeline type oil-water separator spinning device and the like.

Further, the elbow is a right-angle elbow.

The invention provides a steam distribution regulator with equal flow rate and dryness, which includes an elbow, a steam-water separator, a distributor, and a flow restrictor. The front end of the elbow and the end of the flow restrictor are provided with welding grooves for Welding with other pipelines, of course, can also use other connection methods, such as flanges, clamps, etc.

The elbow is an elbow with the inlet and outlet at 90°, which is used to change the horizontal flow of wet saturated steam to vertical flow and eliminate the influence of gravity on the separation effect of the steam-water separator.

The steam-water separator includes a casing and several separation blades, the casing is a short cylindrical tube, and the separation blade is an approximately semicircular sheet, which is installed inside the casing and forms a certain angle with the axis of the casing. The axes are installed at a certain angle to each other, so that the blades at a certain angle to each other and the inner surface of the shell form several spiral channels. When the wet saturated steam passes through, the wet saturated steam flowing in a straight line becomes a rotating flow. Due to the centrifugal force, the moisture in the wet saturated steam flows along the inner wall of the separator due to its high density, and the water vapor flows along the central part of the separator due to its low density, and the vapor and liquid are separated.

The distributor is a cylinder, the outer diameter is the same as that of the separator, and the lower end is drilled with a large circular hole with the same inner diameter as the outer casing of the separator. On the outer surface, inside the large circular hole, there are the same number of partitions as the small circular holes, and the partitions are arranged along the radial direction from the axis of the large circular hole. Divide the circular hole into equal parts with the small circular holes. When the separated vapor and liquid pass through the separator, they are divided into equal parts with the same number of small circular holes. The degree and flow are the same. The upper end face of the distributor is a blind hole.

The first type of flow restrictor includes an outer tube, a centralizing rod, a spring and a floating ring. The outer tube is a cylinder, the inner diameter is the same as the small circular hole on the outer circle of the distributor, there is a conical circular hole at the left end, a circular hole at the right end, a partition in the middle, and a small circle on the center line of the partition. The hole is surrounded by a liquid flow channel; the centralizing rod is a cylindrical rod with a step on the left end and a thread on the right end, which is screwed on the circular hole on the center line of the outer tube partition; the floating ring is a cylinder with a through hole in the middle, through which On the left end of the centralizing rod; the spring is sleeved on the centralizing rod, on the right end of the floating ring.

Separator, referring to Figure 3a, Figure 3b, Figure 3c, Figure 4, first put the vane 22 into the inner hole of the casing 21, the arc part is close to the inner wall of the casing 21, and make the vane 22 and the axis of the inner hole of the casing 21 45 ° angle (the angle between the vane and the axis of the inner hole of the casing is between 30° and 60°), and then the vane 22 and the casing 21 are welded together. Next, put the blade 23 into the casing 21, the arc part is close to the inner wall of the casing 21, the straight face part is opposite to the straight face of the blade 22, the apex of the blade 23 and the apex of the blade 22 are on the same circumference, and form an angle of 120°, The blade 23 forms an angle of 45° with the axis of the hole 21 in the casing. In the next step, the blade 23 and the casing 21 are welded together. Similarly, put the vane 24 into the inner hole of the casing 21, the arc part is close to the inner wall of the casing 21, and make the vane 24 and the axis of the inner hole of the casing 21 form an angle of 45°, the apex of the vane 24 and the vane 22, the vane 23 The vertices are on the same circumference and at an angle of 120° to the blade 23 . Then it is welded with the shell 21, and the separator 2 is completed.

The distributor, referring to Figure 1b and Figure 5ba, Figure 5ba, Figure 5ba and Figure 6b, installs the partition plate 43 into the vapor and liquid separation chamber 42 of the main body 41, and the three branches of the partition plate 43 connect the three The flow channels 44 , 45 , 46 are spaced apart and then welded together with the main body 41 . The outer circle where the separator is located is coaxial with the axis of the vapor-liquid separation chamber 42 .

7a and 7b, the floating ring 62 and the spring 64 are passed through the centralizing rod 63 in sequence, and then installed into the conical flow channel 65 of the housing 61, and one end of the centralizing rod 63 is screwed to On the mounting hole 66 of the centralizing rod on the housing 61 .

Referring to Figure 1b, weld the elbow 1, the separator 2, and the distributor 4 together in sequence, and finally weld the large end of the conical flow channel 65 on the restrictor 6 (or the upstream bracket end of the restrictor A) to the On the outlets of the liquid flow channels 44, 45, 46 of the distributor 4.

The technical principle adopted in the present invention is: the wet saturated steam enters the separator 2 from one end of the elbow 1, and there are cyclone channels 25, 26, 27 in the separator 2, and the wet saturated steam entering is changed from a linear flow to a rotary flow, The swirling wet saturated steam enters the vapor and liquid separation chamber 42 of the distributor 4. Due to the centrifugal force, the moisture in the wet saturated steam flows along the inner wall of the vapor and liquid separation chamber 42 due to its high density. While flowing along the center of the vapor and liquid separation chamber 42, the vapor and liquid are separated. When the wet saturated steam separated by vapor and liquid encounters the separator 43, it is divided into three equal parts and enters the liquid flow channels 44, 45 and 46 respectively. The flow rate and dryness of three equal parts of wet saturated steam are the same.

The equally divided wet saturated steam enters the conical flow channel 65 of the restrictor 6 along the liquid flow channels 44 , 45 and 46 , and generates a throttling pressure difference at the floating ring 62 , which has a negative effect on the floating ring 62 . The force pushes the floating ring 6 to compress the spring 64 and moves along the centralizer 63 in the conical flow channel 65, and the flow area of the wet saturated steam changes. When the force generated by the throttling pressure difference is equal to the force of the spring 64 , the system is in a stable state; in the well section with strong formation steam absorption capacity, the wet saturated steam flow through the floating ring 62 is large, and the pressure difference generated is also large, the spring 64 is compressed, the flow area of the wet saturated steam is reduced, and the steam The flow decreases accordingly. When the force produced by the throttling differential pressure is the same as the force of the spring 64, the system is in a steady state. vice versa. By adjusting in this way, the flow rate of the wet saturated steam passing through each restrictor 6 is equal, and through the equal dryness distribution of the distributor 4 and the flow adjustment of the restrictor 6, the flow rate and dryness entering each steam injection well are In the same way, the distribution of wet saturated steam with equal flow and dryness is realized, and it can be adjusted automatically.

The equal-flow equal-dryness steam distributor provided by the present invention regards the steam boiler, the main steam line, each branch and each steam injection well as a pressure system, and the system influences each other and can be automatically adjusted, so that each branch enters the oil layer The steam dryness and flow rate are basically the same.

Example 2:

Please refer to all drawings, the present invention provides one of the technical solutions:

On the basis of Embodiment 1, the flow restrictor adopts the second structure, and the second flow restrictor includes an upstream support, a float, a mandrel, a guide rod, a spring, and a downstream support. Both the upstream bracket and the downstream bracket are a cross, with a cylinder protruding from the center, and a circular hole in the cylinder. The diameter of the circular hole is slightly larger than the outer diameter of the guide rod; the two ends of the float are cylinders, the middle is a cone, and the inner There is a through hole, and the inner diameter is slightly larger than that of the guide rod; the guide rod is a cylinder; the spring is an ordinary coil spring; The throttling orifice structure cooperates with the float to realize the purpose of adjusting the flow.

The current limiter includes:

Work cylinder 6A3, the center of the work cylinder is provided with an integrated diameter reducing plate, the center of the reducing diameter plate is provided with a tapered hole, the front port of the tapered hole is a small diameter port, the rear port of the tapered hole is a large diameter port, and the tapered hole is used as a diffuser hole, the front port of the mandrel, that is, the upstream port, is connected to the downstream port of the distributor;

Upstream bracket 6A1, the edge of the upstream bracket is fixed on the upstream port of the working cylinder, and the center of the rear end face of the upstream bracket is provided with a rear central circular hole;

Downstream bracket 6A6, the edge of the downstream bracket is fixed on the downstream port of the working cylinder, and the center of the front end face of the downstream bracket is provided with a front center circular hole;

Guide rod 6A4, the front end of the guide rod is fitted into the rear central circular hole of the rear end face of the upstream support, the rear end of the guide rod is fitted into the front central circular hole of the front end face of the downstream support, and the guide rod is fitted with a spring 6A5;

Float 6A2, the outer wall of the float is a conical surface, the float has a central hole and is sleeved on the guide rod, the rear end of the float extends into the conical hole, the maximum outer diameter of the outer wall of the float is smaller than the inner diameter of the working cylinder, and the front end of the spring is connected to The rear end of the float and the rear end of the spring are connected to the downstream support. The space section between the outer wall of the float and the inner wall of the conical hole is the cross-sectional area of flow. As the float slides on the guide rod, the cross-sectional area of flow changes in real time.

Further, the edge of the upstream bracket is fixed in the upper slot 6A31 opened at the upstream port of the working cylinder, and the edge of the downstream bracket is fixed in the lower slot 6A34 opened at the downstream port of the working cylinder.

8a, 8b, 9, the downstream bracket 6A6 is placed in the slot 6A34 of the mandrel 6A3, and welded together, and then the guide rod 6A4 is inserted into the circular hole of the downstream bracket 6A6 6A61, then install the spring 6A5 and the float 6A2 in sequence, and then install the guide rod 6A4 into the round hole 6A11 of the upstream bracket 6A1, and then install the upstream bracket 6A1 into the slot 6A31 of the working cylinder 6A3, and connect it with Mandrels 6A3 are welded together.

The purpose and working principle of the two current limiters are basically the same.

The equally divided wet saturated steam enters the conical flow channel formed by the float 6A2 of the restrictor 6A and the circular hole 6A32 on the working cylinder along the liquid flow channels 44, 45 and 46, and a throttling pressure difference is generated at the float 6A2. The force generated by the pressure difference on the float 6A2 pushes the float 6A2 to compress the spring 6A5 and move along the conical flow channel 65 or the guide rod 6A4, and the flow area of the wet saturated steam changes. When the force of the spring 6A5 is equal, the system is in a stable state; in the well section with strong formation steam absorption capacity, the wet saturated steam flow through the float 6A2 is large, and the pressure difference is also large, the spring 6A5 is compressed, and the excess of the wet saturated steam. The flow area decreases, and the steam flow decreases accordingly. When the force produced by the throttling differential pressure is the same as that of the spring 6A5, the system is in a steady state. vice versa. Through this adjustment, the flow rate of the wet saturated steam passing through each restrictor 6A is equalized, and through the equal dryness distribution of the distributor 4 and the flow adjustment of the restrictor 6A, the flow rate and dryness entering each steam injection well are In the same way, the distribution of wet saturated steam with equal flow and dryness is realized, and it can be adjusted automatically.

Of course, an embodiment with more components is the best embodiment, and an embodiment with fewer components is a basic embodiment, but it can also achieve the basic purpose of the invention, so all these are within the protection scope of the present invention Inside.

All the components themselves that are not discussed in this application and the connection methods of each component in this application belong to the well-known technology in the technical field, and will not be described again. Such as welding, threaded connections, etc.

In the present invention, the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be It is directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the orientations shown in the accompanying drawings Or the positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or unit must have a specific direction, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiment", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in the present invention at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or instance. 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 descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. A dryness steam distributor such as equal flow, comprising separator, distributor, the downstream port of described separator is connected with the upstream port of distributor, it is characterized in that, also comprises elbow, 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; At least two downstream ports of the distributor are opened, and the downstream port of the distributor is connected to the upstream port of the flow restrictor, and the downstream port of the flow restrictor communicates with the steam injection well. 2. a kind of equal flow equal dryness steam distributor according to claim 1, is characterized in that, described distributor comprises: The main body has two or more liquid flow channels of the same structure inside the main body, the inner cavity of the main body located in the upstream direction of the liquid flow channel is used as a steam-water separation chamber, and the main body also has a radial outlet, and the radial outlet is the distribution The downstream port of the device, the number of radial outlets is consistent with the number of liquid flow channels, and they are connected in pairs one by one; The separator is fixed in the steam-water separation chamber, and divides the steam-water separation chamber into two or more single chambers of the same size. Correspondingly, the steam-water separation chamber communicates with the upstream port of the distributor. 3. a kind of equal flow equal dryness steam distributor according to claim 1 or 2, is characterized in that, described flow restrictor comprises: The flow restrictor casing is provided with an integrated flow plate inside the flow restrictor casing, and a flow passage is set on the flow plate, and the inner cavity of the casing located in the upstream direction of the flow plate is a conical flow channel. The downstream port connection of the distributor; Centralizing rod, the rear end of the centralizing rod is installed in the centralizing rod installation hole opened on the flow plate, the centralizing rod is covered with a spring, the front end of the centralizing rod is also covered with a floating ring, the front end of the spring is connected with the floating ring, and the rear end of the spring is connected with the flow plate , the centralizing rod and the floating ring are both located inside the conical flow channel, and the space section between the outer wall of the floating ring and the inner wall of the conical flow channel is used as the cross-sectional area of flow. As the floating ring slides on the centralizing rod, the cross-sectional area of It also changes in real time. 4. a kind of equal flow equal dryness steam distributor according to claim 1 or 2, is characterized in that, described restrictor comprises: The working cylinder, the center of the working cylinder is provided with an integrated reducing plate, the center of the reducing plate is provided with a conical hole, the front port of the conical hole is a small diameter port, the rear port of the conical hole is a large diameter port, and the conical hole is used as a diffusion hole , the front port of the mandrel, that is, the upstream port, is connected to the downstream port of the distributor; an upstream support, the edge of the upstream support is fixed on the upstream port of the working cylinder, and the center of the rear end face of the upstream support is provided with a rear central circular hole; a downstream support, the edge of the downstream support is fixed on the downstream port of the working cylinder, and the center of the front end face of the downstream support is provided with a front central circular hole; a guide rod, the front end of the guide rod is fitted into the rear central circular hole of the rear end face of the upstream support, the rear end of the guide rod is fitted into the front central circular hole of the front end face of the downstream support, and a spring is sleeved on the guide rod; The float, the outer wall of the float is a conical surface, the float has a central hole and is sleeved on the guide rod, the rear end of the float extends into the conical hole, the maximum outer diameter of the outer wall of the float is smaller than the inner diameter of the working cylinder, and the front end of the spring is connected to the float The rear end of the spring is connected to the downstream support. The space section between the outer wall of the float and the inner wall of the tapered hole is used as the cross-sectional area of flow. As the float slides on the guide rod, the cross-sectional area of flow changes in real time. 5 . The equal-flow and equal-dryness steam distributor according to claim 4 , wherein the edge of the upstream support is fixed in the upper slot opened in the upstream port of the working cylinder, and the edge of the downstream support is fixed in the upper slot. 6 . in the lower card slot opened at the downstream port of the working cylinder. 6 . The equal-flow equal-dryness steam distributor according to claim 1 or 2 , wherein the separator is a cyclone separator. 7 . 7. A kind of equal flow equal dryness steam distributor according to claim 6, is characterized in that, described cyclone separator comprises: The separator shell, the separator shell is a tubular body, the upstream port of the separator is welded with the downstream port of the elbow, and the downstream port of the separator is welded with the upstream port of the distributor; The swirl vane assembly is installed inside the separator housing. 8. A kind of equal flow equal dryness steam distributor according to claim 7, is characterized in that, described swirl vane assembly comprises: Blade 1, the inner side of the blade 1 is a straight side, the outer side is a circular arc side, and the circular arc side of the blade 1 is welded with the inner wall of the separator shell; The second blade, the inner edge of the second blade is a straight edge, the outer edge is an arc edge, the arc edge of the second blade is welded with the inner wall of the separator shell, and the center point of the second straight edge of the blade is welded with the center point of the straight edge of the blade; The third blade, the inner edge of the blade three is a straight edge, the outer edge is an arc edge, the arc edge of the blade three is welded with the inner wall of the separator shell, and the center point of the three straight edges of the blade is welded with the center point of the straight edge of the blade; The first blade, the second blade and the third blade are not on the same plane with each other. 9 . The equal-flow equal-dryness steam distributor according to claim 1 or 2 , wherein the elbow is a right-angle elbow. 10 .

Images