CN209752640U

CN209752640U - foam generator

Info

Publication number: CN209752640U
Application number: CN201822244208.4U
Authority: CN
Inventors: 张晓宇; 高彬; 董超; 尚锋; 牟平; 况宇; 张雪超; 余晓晨; 王龙; 张�浩; 罗超
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2019-12-10
Anticipated expiration: 2028-12-28

Abstract

The application provides a foam generator, including: a housing, a centerbody, and an inner tube. The shell is internally provided with a cavity, and the side wall of the shell is provided with a through hole penetrating to the cavity so as to inject gas into the cavity. The central body is arranged in the cavity, a first baffle and a second baffle are sleeved and fixedly connected on the central body, the first baffle and the second baffle are alternately arranged, the first baffle is fixedly connected with the shell, a first through hole communicated with the through hole is formed in the surface of the first baffle, and a gap is formed between the free end of the second baffle and the shell. The inner pipe is sleeved in the shell and fixedly connected with the first baffle and the second baffle, a second through hole close to the free end of the first baffle relative to the first through hole is formed in the inner pipe, and the second through hole is formed between the first baffle and the second baffle and communicated with the first through hole. The foam generator of this application can make foaming liquid and gaseous intensive mixing, collision and extrusion, and the average size that forms the foam is little, and size distribution is even, and mixing efficiency is high.

Description

Foam generator

Technical Field

The application belongs to the technical field of oil exploitation, and particularly relates to a foam generator.

Background

The application range of the foam in oil displacement of the oil field is wider, and the foam is mainly applied to foam drilling, foam well washing, foam sand washing, foam cement well cementation, foam fracturing and acidizing, foam oil testing, foam profile control and water plugging and the like.

At present, the foam generators commonly used at home and abroad comprise a stirring type foam generator, a turbine type foam generator, a spiral type foam generator, a pore type foam generator, a concentric tube type foam generator, a baffle type foam generator and the like. Foaming in the oil layer is more frequent, and a certain oil increasing effect is obtained. The condition that foam is used outside an oil layer sometimes occurs, and meanwhile, due to the fact that most of foam has certain corrosiveness on a shaft, a tool for foaming under a well is needed to achieve a good oil increasing effect, meanwhile, corrosion to the shaft can be reduced, and difficulty of oil well operation is not increased.

Therefore, there is a need to provide a new foam generator that overcomes the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

in order to overcome the above-mentioned defect of prior art, the utility model aims to solve the technical problem that a foam generator is provided, it can make foaming liquid and gaseous intensive mixing, collision and extrusion, has the advantage that the average size that forms the foam is little, size distribution is even and mixing efficiency is high.

The utility model discloses a concrete technical scheme is:

The utility model provides a foam generator, include:

The gas injection device comprises a housing which extends lengthways, wherein a cavity is arranged in the housing, and a through hole which penetrates through the cavity is formed in the side wall of the housing so as to inject gas into the cavity;

The central body is arranged in the cavity, a first baffle and a second baffle are sleeved and fixedly connected on the central body, the first baffle and the second baffle are alternately arranged, the first baffle is fixedly connected with the shell, a first through hole communicated with the through hole is formed in the surface of the first baffle, and a gap is formed between the free end of the second baffle and the shell;

The inner pipe is sleeved in the shell and fixedly connected with the first baffle and the second baffle, a second through hole close to the free end of the first baffle relative to the first through hole is formed in the inner pipe, and the second through hole is formed between the first baffle and the second baffle and communicated with the first through hole.

In a preferred embodiment, the housing has a first end portion which is a foaming liquid inlet end and a second end portion which is a foam outlet end.

In a preferred embodiment, the first through hole is communicated with the foaming liquid inlet end, and the second through hole is communicated with the foam outlet end.

In a preferred embodiment, the number of the second baffles is equal to or greater than the number of the first baffles.

In a preferred embodiment, the first through hole communicates with both the foaming liquid inlet end and the foam outlet end.

in a preferred embodiment, the number of the second baffles is smaller than the number of the first baffles.

In a preferred embodiment, an upper connector is connected to the first end of the housing, and a lower connector is connected to the second end of the housing.

in a preferred embodiment, a jet device is disposed in the housing, the jet device is fixedly connected to the first end of the housing, and a plurality of third through holes communicated to the chamber are formed in the jet device.

In a preferred embodiment, the third through holes are uniformly distributed on the ejector in the axial direction.

In a preferred embodiment, the through-hole is provided between the ejector and the center body.

In a preferred embodiment, the first through holes are uniformly distributed on the first baffle plate in an axisymmetric manner with respect to the central body.

in a preferred embodiment, the free end of the second baffle passes out of the inner tube.

in a preferred embodiment, a plug is attached to the end of the inner tube.

Borrow by above technical scheme, the beneficial effect of this application lies in: the utility model discloses a foam generator can make foaming liquid and gas fully collide and extrude in the casing, and the average size that has the formation foam is little, size distribution is even to foaming efficiency is higher, characteristics such as foam stability. The generated foam is fine and stable, and meanwhile, the corrosion to a shaft can be reduced, the oil displacement effect is achieved, and meanwhile, the construction difficulty is not increased. The foam generator can be installed on the ground and can be lowered into a shaft along with a construction pipe column, and the foam generator is suitable for construction operation needing foaming.

Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for assisting the understanding of the present application, and are not particularly limited to the shapes, the proportional sizes, and the like of the respective members in the present application. Those skilled in the art, having the benefit of the teachings of this application, may select various possible shapes and proportional sizes to implement the present application, depending on the particular situation. In the drawings:

Fig. 1 is a schematic structural view of a foam generator according to an embodiment of the present application.

Reference numerals of the above figures: 1. a housing; 11. a chamber; 12. a through hole; 13. a first end portion; 14. a second end portion; 15. an upper joint; 16. a lower joint; 2. a central body; 3. a first baffle plate; 31. a first through hole; 4. a second baffle; 41. a gap; 5. an inner tube; 51. a second through hole; 6. an ejector; 61. a third through hole; 7. pipe plug

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the present application provides a foam generator, comprising: a housing 1, a central body 2, and an inner tube 5. The housing 1 extends along a longitudinal direction, a chamber 11 is arranged in the housing 1, and a through hole 12 penetrating to the chamber 11 is arranged on a side wall of the housing 1 so as to inject gas into the chamber 11. The central body 2 is arranged in the cavity 11, a first baffle 3 and a second baffle 4 are sleeved and fixedly connected on the central body 2, the first baffle 3 and the second baffle 4 are alternately arranged, the first baffle 3 is fixedly connected with the shell 1, a first through hole 31 communicated with the through hole 12 is formed in the surface of the first baffle 3, and a gap 41 is formed between the free end of the second baffle 4 and the shell 1. The inner pipe 5 is sleeved in the shell 1 and fixedly connected with the first baffle 3 and the second baffle 4, a second through hole 51 close to the free end of the first baffle 3 relative to the first through hole 31 is formed in the inner pipe 5, and the second through hole 51 is formed between the first baffle 3 and the second baffle 4 and communicated with the first through hole 31.

When the foam generator is used, foaming liquid can be injected into the first end part 13 of the shell 1, gas is injected into the through hole 12 of the shell 1, the gas and the foaming liquid can be fully mixed and preliminarily foamed in the cavity 11 of the shell 1, the fluid after preliminary foaming can be collided and extruded for multiple times through the first through hole 31 on the first baffle plate 3 and the second through hole 51 on the inner pipe 5 to further foam, and finally, the foam flows out from the second end part 14 of the shell 1 and is injected into a target position.

The utility model discloses a foam generator can make foaming liquid and gaseous sufficient collision and extrusion in casing 1, and it is little, the size distribution is even to have the average size that forms the foam to foaming efficiency is higher, characteristics such as foam stability. The generated foam is fine and stable, and meanwhile, the corrosion to a shaft can be reduced, the oil displacement effect is achieved, and meanwhile, the construction difficulty is not increased. The foam generator can be installed on the ground and can be lowered into a shaft along with a construction pipe column, and the foam generator is suitable for construction operation needing foaming.

In the present embodiment, the housing 1 is substantially cylindrical, the housing 1 may have a first end 13 and a second end 14 along the longitudinal direction, the first end 13 of the housing 1 is connected with an upper joint 15, and the second end 14 of the housing 1 is connected with a lower joint 16. Specifically, the first end 13 of the housing 1 may be a foaming liquid inlet end, and the second end 14 may be a foam outlet end. The housing 1 may have a chamber 11 therein, and a through hole 12 may be formed in a side wall of the housing 1, and the through hole 12 may penetrate the chamber 11, so as to facilitate the injection of gas bubbles into the chamber 11.

The central body 2 may be disposed in the middle of the chamber 11 of the housing 1, and the central body 2 may be sleeved and fixedly connected with the first baffle 3 and the second baffle 4. Specifically, the first baffle 3 and the second baffle 4 may be alternately arranged on the central body 2, the free end of the first baffle 3 is fixedly connected with the inner wall of the casing 1, and the free end of the second baffle 4 needs to reserve a certain gap 41 with the casing 1. The first through hole 31 may be formed on the plate surface of the first baffle 3 and communicated with the through hole 12, so that the foaming liquid and the gas are fully mixed and then flow into the first through hole 31. Preferably, the first through holes 31 are evenly distributed on the first baffle 3 with the central body 2 as an axis.

The inner pipe 5 can be sleeved in the casing 1 and forms an annular space with the casing 1, and the tail end of the inner pipe 5 can be generally connected with a plug 7. The inner tube 5 may be fixedly connected to both the first baffle 3 and the second baffle 4. Preferably, the free end of the second baffle 4 can pass out of the inner tube 5 to sufficiently disturb the fluid. A second through hole 51 may be formed in the sidewall of the inner tube 5 between the first baffle 3 and the second baffle 4, and the second through hole 51 may be communicated with the first through hole 31, so that the fluid may pass through the first through hole 31 and the second through hole 51, and the fluid mixed with the foaming liquid and the gas may be sufficiently impacted and extruded. It should be noted that the second through hole 51 is closer to the free end of the first baffle 3 than the first through hole 31, so that the fluid can flow back and forth inside and outside the inner tube 5 through the first through hole 31 and the second through hole 51 to form sufficient stirring.

in one embodiment, the first through-hole 31 communicates with the foaming liquid inlet end and the second through-hole 51 communicates with the foam outlet end. The number of the second baffles 4 is more than or equal to that of the first baffles 3. Thus, the fluid can flow into the inner pipe 5 from the first through hole 31 (or the second through hole 51), then flow into the annular space between the inner pipe 5 and the casing 1 from the second through hole 51, and flow into the inner pipe 5 again from the second through hole 51 on the other side of the second baffle 4, and so on until the fluid flows out of the inner pipe 5 to the annular space from the last second through hole 51. This allows the fluid to exit the housing 1 through the foam outlet port after sufficient impact squeezing.

In another embodiment, the first through holes 31 may communicate with both the foaming liquid inlet end and the foam outlet end, so that the number of the second baffles 4 is smaller than the number of the first baffles 3. Thus, the fluid can flow into the inner pipe 5 from the first through hole 31, flow into the annular space between the inner pipe 5 and the housing 1 from the second through hole 51, and flow into the inner pipe 5 again from the second through hole 51 on the other side of the second baffle 4 until flowing to the foam outlet end from the first through hole 31 on the first baffle 3 on the other side.

Preferably, an ejector 6 may be further disposed in the housing 1, the ejector 6 may be fixedly connected to the first end portion 13 of the housing 1, and a plurality of third through holes 61 communicating with the chamber 11 may be formed in the ejector 6, so that the foaming liquid flows out of the plurality of streams from the ejector 6. Preferably, the third through holes 61 may be uniformly distributed on the ejector 6 in the axial direction. The through hole 12 may be provided between the ejector 6 and the central body 2. This allows the gas to be thoroughly and uniformly mixed with the plurality of streams of fluid.

It should be noted that any suitable existing structure may be used for the plug 7 and the like provided in this embodiment. For clearly and briefly explaining the technical solution provided by the present embodiment, the above parts will not be described again, and the drawings in the specification are also simplified accordingly. It should be understood, however, that the present embodiments are not limited in scope thereby.

Any numerical value recited herein includes all values from the lower value to the upper value that are incremented by one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.

all articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego the subject matter and should not be construed as an admission that the applicant does not consider such subject matter to be part of the disclosed subject matter.

Claims

1. A foam generator, comprising:

2. The foam generator as recited in claim 1, wherein the housing has a first end and a second end, the first end being a foaming liquid inlet end and the second end being a foam outlet end.

3. The foam generator as recited in claim 2, wherein the first through hole communicates with the foaming liquid inlet end and the second through hole communicates with the foam outlet end.

4. The foam generator as recited in claim 3, wherein the number of the second baffles is equal to or greater than the number of the first baffles.

5. The foam generator as recited in claim 2, wherein the first through-hole communicates with both the foaming liquid inlet end and the foam outlet end.

6. The foam generator as recited in claim 5, wherein the number of second baffles is less than the number of first baffles.

7. The foam generator as recited in claim 2, wherein an upper connector is connected to the first end of the housing and a lower connector is connected to the second end of the housing.

8. The foam generator as claimed in claim 1, wherein an ejector is provided in the housing, the ejector is fixedly connected to the first end of the housing, and the ejector is provided with a plurality of third through holes communicated to the chamber.

9. The foam generator as recited in claim 8, wherein the third through holes are evenly distributed on the ejector in the axial direction.

10. The foam generator as recited in claim 8, wherein the through-hole is disposed between the ejector and the center body.

11. The foam generator as claimed in claim 1, wherein the first through holes are uniformly distributed on the first baffle plate in an axisymmetric manner with respect to the central body.

12. The foam generator as recited in claim 1, wherein a free end of the second baffle extends out of the inner tube.

13. The foam generator as recited in claim 1, wherein a plug is attached to an end of the inner tube.