A steam-assisted tube plunger pump and fluid delivery apparatus

Abstract

The utility model discloses a steam is accompanied and is injected pipe type plunger pump and fluid delivery equipment, this steam is accompanied and is injected pipe type plunger pump including pump cylinder and plunger. Pump cylinder is the tubular structure, the pump cylinder has inner wall body and outer wall body, the upper end of inner wall body is open setting, the upper end between inner wall body and outer wall body is closed setting, the first cavity is defined to the formation between inner wall body and outer wall body, the first injection hole and first injection hole of being located respectively in two sides on the upper end of inner wall body, the bottom wall between outer wall body and inner wall body is equipped with the first one -way sealing structure for limiting the fluid in -flow in the inner wall body in outer wall body, plunger is the tubular structure, the upper end of plunger is open setting, the second cavity is defined to the formation in plunger, the periphery of plunger is installed on the inner wall surface of inner wall body, and the second injection hole and the second injection hole of communicating with first injection hole are equipped with respectively in the two sides of plunger.

Description

Technical Field

[0001] This utility model relates to the field of petroleum extraction technology, and in particular to a steam-assisted injection pipe plunger pump and fluid transport equipment. Background Technology

[0002] Heavy oil is defined as crude oil with a viscosity greater than 50 mPa·s under reservoir conditions or a viscosity greater than 100 mPa·s for degassed crude oil. Currently, the main technologies for heavy oil reservoir development are steam huff and puff, steam drive, and steam gravity-assisted drainage. However, there is room for further improvement in their development efficiency and effectiveness. Therefore, it is necessary to explore methods to enhance the utilization rate, development efficiency, and recovery rate of heavy oil.

[0003] Steam tandem injection refers to the process of directly injecting steam into the wellbore while lifting the produced fluid. This ensures a higher temperature within the wellbore, facilitating the entry of the produced fluid into the pump, extending the steam huff and puff or steam drive cycle, and improving development efficiency. Currently, steam tandem injection can utilize hollow rods to inject steam into both the upper and lower sections of the wellbore above and below the pump. When steam is directly injected into the upper section of the pump, due to the influence of the produced fluid volume and water content, it only heats the upper part of the pump, making it difficult to meet the requirements for smooth entry of heavy oil into the pump. When steam is injected into the lower section of the pump, the low steam tandem pressure is insufficient to inject steam into the lower section through the hollow rod and pump barrel space, also failing to meet the requirements for smooth entry of heavy oil into the pump. Conversely, high steam tandem pressure increases bottomhole pressure, hindering the flow of formation fluids into the wellbore and suppressing the well's productivity.

[0004] To reduce the difficulty of heavy oil entering the pump and extend the cycle of steam injection and steam drive, there is an urgent need for a tubular plunger pump that can simultaneously produce oil and inject steam, ensuring smooth entry of heavy oil into the pump without affecting the oil well's productivity.

[0005] The above content is only used to help understand the technical solution of this utility model and does not represent an admission that the above content is prior art. Utility Model Content

[0006] The main objective of this invention is to provide a steam-assisted injection pipe plunger pump and fluid transport equipment, which aims to solve the above-mentioned problems.

[0007] To achieve the above objectives, this utility model provides a steam-injected plunger pump, which includes:

[0008] The pump barrel has a cylindrical structure, having an inner wall and an outer wall. The upper end of the inner wall is open, and the upper end between the inner wall and the outer wall is closed. A first cavity is defined between the inner wall and the outer wall. The inner wall has a first injection hole and a first discharge hole located on both sides. A first one-way sealing structure is provided between the bottom walls of the inner wall and the outer wall to restrict the flow of fluid from the inner wall into the outer wall.

[0009] A plunger, in the form of a cylindrical structure, has an open upper end and a second cavity defined within it. The outer periphery of the plunger is mounted on the inner wall of the inner wall body. A second injection hole and a second outlet hole communicating with the first outlet hole are respectively provided on both sides of the plunger. The second injection hole is connected to a hollow connecting tube structure, which is housed within the second cavity. One end of the connecting tube structure communicates with the second injection hole, and the other end extends outward from the second cavity. The bottom wall of the plunger is provided with a second one-way sealing structure for restricting fluid outflow.

[0010] Preferably, in the steam-assisted injection tubular plunger pump, the second injection port and the second discharge port are located near the bottom of the plunger.

[0011] Preferably, in the steam-assisted pipe plunger pump, the other end of the connecting pipe structure is connected to a hollow rod.

[0012] Preferably, in the steam-assisted pipe plunger pump, a connecting channel is provided through the bottom walls of the inner wall and the outer wall, and the connecting channel extends from the bottom wall of the inner wall to the bottom wall of the outer wall.

[0013] The first one-way sealing structure includes a first valve cover and a first valve ball. The first valve cover is disposed on the bottom wall of the inner wall body, and the first valve ball is at least partially housed within the connecting channel and located below the first valve cover.

[0014] Preferably, in the steam-assisted pipe plunger pump, the bottom wall of the plunger is provided with a through hole;

[0015] The second one-way sealing structure includes a second valve cover and a second valve ball. The second valve cover is disposed on the bottom wall of the plunger and located in the second cavity. The second valve ball is at least partially accommodated in the through hole and located below the second valve cover.

[0016] Preferably, in the steam-accompanied tubular plunger pump, the outer periphery of the plunger is screwed together with the inner wall surface of the inner wall body by external and internal threads.

[0017] Preferably, in the steam-assisted pipe plunger pump, the plunger and the connecting pipe are integrally formed.

[0018] Preferably, in the steam-assisted injection pipe plunger pump, the second injection hole is an irregularly shaped hole.

[0019] Preferably, in the steam-assisted injection pipe plunger pump, the second injection port is located in the lower middle part of the plunger.

[0020] This utility model also provides a fluid conveying device, which includes the above-mentioned steam-assisted pipe plunger pump.

[0021] This utility model has at least the following beneficial effects:

[0022] The steam-assisted injection tubular plunger pump provided by this utility model allows steam to enter the connecting pipe structure through a hollow rod, and then enter the first chamber through the second injection hole of the connecting pipe structure and the first injection hole. Steam flows from one side of the first chamber to the bottom of the pump barrel, and then to the other side of the pump barrel. It flows out from the first injection hole, passes through the second injection hole, and enters the second chamber of the plunger. It is then lifted to the wellhead along with the produced fluid. This allows for simultaneous oil production and steam injection, ensuring that heavy oil can be smoothly pumped into the pump without affecting the oil well's production capacity.

[0023] Furthermore, this invention injects steam into the well while lifting crude oil, which can ensure that heavy oil enters the pump smoothly without affecting the bottom hole pressure. It also increases the wellbore temperature, extends the steam injection cycle, and improves the economic benefits of heavy oil development.

[0024] Furthermore, steam enters the connecting pipe structure through the hollow rod, then enters the first chamber of the pump barrel, and then returns to the plunger through the first chamber, forming a steam accompaniment channel. This makes steam accompaniment during the lifting process operable, enabling steam to heat the pump barrel and the wellbore above the pump barrel, keeping the wellbore at a certain temperature. This reduces the difficulty of fluid entering the pump and extends the steam infeed cycle. In addition, steam does not enter the bottom of the well or the formation during the accompaniment process, avoiding the influence of injection pressure on the bottom hole flowing pressure. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an embodiment of the steam-accompanied tubular plunger pump provided by this utility model;

[0026] Figure 2 for Figure 1 Schematic diagram of the intermediate pump cylinder;

[0027] Figure 3 for Figure 1 A schematic diagram of the middle plunger.

[0028] 1-Pump barrel, 11-Inner wall body, 111-First injection hole, 112-First discharge hole, 12-Outer wall body, 13-First cavity, 14-First one-way sealing structure, 141-First valve cover, 142-First valve ball;

[0029] 2-Plunger, 21-Second cavity, 22-Second injection hole, 23-Second discharge hole, 24-Connecting pipe structure, 25-Second one-way sealing structure, 251-Second valve cover, 252-Second valve ball.

[0030] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0032] In this embodiment of the invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0034] In this embodiment of the invention, the term "multiple" refers to two or more, and other quantifiers are similar.

[0035] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0036] This utility model provides a steam-assisted injection pipe type plunger pump, such as... Figures 1 to 3The steam-assisted injection pipe type plunger 2 pump includes a pump barrel 1 and a plunger 2. The pump barrel 1 has a cylindrical structure, having an inner wall 11 and an outer wall 12. The upper end of the inner wall 11 is open, and the upper end between the inner wall 11 and the outer wall 12 is closed. A first cavity 13 is defined between the inner wall 11 and the outer wall 12. The inner wall 11 has a first injection hole 111 and a first discharge hole 112 located on both sides. A first one-way sealing structure 14 is provided between the bottom walls of the inner wall 11 and the outer wall 12 to restrict the flow of fluid from the inner wall 11 into the outer wall 12. The plunger 2 has a cylindrical structure, with the upper end open. The plunger 2 is configured to form a second cavity 21. The periphery of the plunger 2 is mounted on the inner wall surface of the inner wall body 11. The plunger 2 has a second injection hole 22 and a second injection hole 23 communicating with the first injection hole 112 respectively on both sides. The second injection hole 22 is connected to a hollow connecting tube structure 24. The connecting tube structure 24 is housed in the second cavity 21. One end of the connecting tube structure 24 communicates with the second injection hole 22, and the other end extends outward from the second cavity 21. The bottom wall of the plunger 2 is provided with a second one-way sealing structure 25 for restricting fluid outflow.

[0037] The steam-assisted injection tubular plunger 2 pump provided by this utility model allows steam to enter the connecting pipe structure 24 through the hollow rod of the connecting pipe structure 24, and then enter the first cavity 13 through the second injection hole 22 and the first injection hole 111 from the second injection hole 22 of the connecting pipe structure 24. Steam then flows from one side of the first cavity 13 to the bottom of the pump barrel 1, and then to the other side of the pump barrel 1. Steam then flows out through the first injection hole 112 and through the second injection hole 23 into the second cavity 21 of the plunger 2, where it is lifted to the wellhead along with the produced fluid. This allows for simultaneous oil production and steam injection, ensuring that heavy oil can be smoothly pumped into the pump without affecting the oil well's production capacity.

[0038] Furthermore, this invention injects steam into the well while lifting crude oil, which can ensure that heavy oil enters the pump smoothly without affecting the bottom hole pressure. It also increases the wellbore temperature, extends the steam injection cycle, and improves the economic benefits of heavy oil development.

[0039] Furthermore, steam enters the connecting pipe structure 24 through the hollow rod, then enters the first cavity 13 of the pump barrel 1, and then returns to the plunger 2 through the first cavity 13, forming a steam accompaniment channel. This makes steam accompaniment during the lifting process operable, realizes the heating of the pump barrel 1 and the wellbore above the pump barrel 1 by steam, keeps the wellbore at a certain temperature, reduces the difficulty of fluid entering the pump, and extends the steam infeed cycle. In addition, steam does not enter the bottom of the well or the formation during the accompaniment process, avoiding the influence of injection pressure on the bottom hole flowing pressure.

[0040] The second injection hole 22 and the second discharge hole 23 are located near the bottom of the plunger 2. The second injection hole 22 is connected to one end of the connecting tube structure 24. The other end of the connecting tube structure 24 is used to connect to the hollow rod.

[0041] The bottom walls of the inner wall 11 and the outer wall 12 are provided with a connecting channel, which extends from the bottom wall of the inner wall 11 to the bottom wall of the outer wall 12; the first one-way sealing structure 14 includes a first valve cover 141 and a first valve ball 142, the first valve cover 141 is placed on the bottom wall of the inner wall 11, and the first valve ball 142 is at least partially accommodated in the connecting channel and located below the first valve cover 141.

[0042] The bottom wall of the plunger 2 is provided with a through hole; the second one-way sealing structure 25 includes a second valve cover 251 and a second valve ball 252. The second valve cover 251 covers the bottom wall of the plunger 2 and is located in the second cavity 21. The second valve ball 252 is at least partially accommodated in the through hole and is located below the second valve cover 251.

[0043] The periphery of the plunger 2 is screwed together with the inner wall surface of the inner wall body 11 by external and internal threads. In some other embodiments, the periphery of the plunger 2 and the inner wall surface of the inner wall body 11 can also be sealed together by other means, which are not specifically limited here.

[0044] The plunger 2 and the connecting pipe structure 24 are integrally formed. The second injection hole 23 is an irregularly shaped hole. The second injection hole 23 is located in the lower middle part of the plunger 2.

[0045] This utility model also provides a fluid conveying device, which includes the steam-accompanied tubular plunger pump described above. It should be noted that embodiments of this fluid conveying device include embodiments of the steam-accompanied tubular plunger pump described above, and the beneficial effects of the steam-accompanied tubular plunger pump can be applied to this fluid conveying device.

[0046] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, those skilled in the art can make other variations or modifications without creative effort, and all such variations or modifications should fall within the protection scope of this utility model.

Claims

1. A steam-assisted injection pipe plunger pump, characterized in that, include: The pump barrel has a cylindrical structure, having an inner wall and an outer wall. The upper end of the inner wall is open, and the upper end between the inner wall and the outer wall is closed. A first cavity is defined between the inner wall and the outer wall. The inner wall has a first injection hole and a first discharge hole located on both sides. A first one-way sealing structure is provided between the bottom walls of the inner wall and the outer wall to restrict the flow of fluid from the inner wall into the outer wall. A plunger, in the form of a cylindrical structure, has an open upper end and a second cavity defined within it. The outer periphery of the plunger is mounted on the inner wall of the inner wall body. A second injection hole and a second outlet hole communicating with the first outlet hole are respectively provided on both sides of the plunger. The second injection hole is connected to a hollow connecting tube structure, which is housed within the second cavity. One end of the connecting tube structure communicates with the second injection hole, and the other end extends outward from the second cavity. The bottom wall of the plunger is provided with a second one-way sealing structure for restricting fluid outflow.

2. The steam-assisted injection pipe plunger pump as described in claim 1, characterized in that, The second injection port and the second discharge port are located near the bottom of the plunger.

3. The steam-assisted injection pipe plunger pump as described in claim 1, characterized in that, The other end of the connecting pipe structure is connected to the hollow rod.

4. The steam-assisted injection pipe plunger pump as described in claim 1, characterized in that, The bottom walls of the inner wall and the outer wall are provided with a connecting channel, which extends from the bottom wall of the inner wall to the bottom wall of the outer wall; The first one-way sealing structure includes a first valve cover and a first valve ball. The first valve cover is disposed on the bottom wall of the inner wall body, and the first valve ball is at least partially housed within the connecting channel and located below the first valve cover.

5. The steam-assisted injection pipe plunger pump as described in claim 1, characterized in that, The bottom wall of the plunger has a through hole; The second one-way sealing structure includes a second valve cover and a second valve ball. The second valve cover is disposed on the bottom wall of the plunger and located in the second cavity. The second valve ball is at least partially accommodated in the through hole and located below the second valve cover.

6. The steam-assisted injection pipe plunger pump as described in claim 1, characterized in that, The periphery of the plunger is screwed together with the inner wall surface of the inner wall body by external and internal threads.

7. The steam-assisted injection pipe plunger pump as described in claim 1, characterized in that, The plunger and the connecting pipe are integrally formed.

8. The steam-assisted injection pipe plunger pump as described in claim 1, characterized in that, The second injection hole is an irregularly shaped hole.

9. The steam-assisted injection pipe plunger pump as described in claim 8, characterized in that, The second injection port is located in the lower middle part of the plunger.

10. A fluid conveying device, characterized in that, Including the steam-assisted tubular plunger pump as described in any one of claims 1 to 9.

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