CN220151321U - Ball seat and pipe column using same - Google Patents
Ball seat and pipe column using same Download PDFInfo
- Publication number
- CN220151321U CN220151321U CN202321599252.1U CN202321599252U CN220151321U CN 220151321 U CN220151321 U CN 220151321U CN 202321599252 U CN202321599252 U CN 202321599252U CN 220151321 U CN220151321 U CN 220151321U
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- Prior art keywords
- piston
- seat body
- tubular
- ball seat
- limiting
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- 238000007789 sealing Methods 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 abstract description 7
- 238000011010 flushing procedure Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000003825 pressing Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 15
- 238000002347 injection Methods 0.000 description 14
- 239000007924 injection Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 230000008569 process Effects 0.000 description 12
- 239000003921 oil Substances 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 10
- 230000009471 action Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003405 preventing effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of valve devices of oil production wells, and particularly relates to a ball seat and a tubular column using the ball seat. The ball seat comprises a piston, a tubular seat body and a ball seat body assembled on the tubular seat body, wherein the piston is provided with a sealing position on the tubular seat body and is kept at the sealing position through a locating pin, the tubular seat body is provided with a limiting structure for limiting the axial movement of the piston, and the limiting structure is positioned below the locating pin. The limiting structure for limiting the axial movement of the piston is arranged below the positioning pin, so that the cross section of the through-flow channel of the tubular seat is not required to be adjusted, the piston is limited, the cross section of the through-flow channel of the tubular seat is kept unchanged, and the through-flow capacity of the tubular column is effectively ensured; in addition, through the cooperation of locating pin and limit structure, can prevent effectively that well interior liquid from getting into tubular column when the well down, realize setting and back flushing when pressing.
Description
Technical Field
The utility model belongs to the technical field of valve devices of oil production wells, and particularly relates to a ball seat and a tubular column using the ball seat.
Background
In the development process of the oil field, the oil layer needs to be frequently injected with water through a water injection well along with the time, especially when the oil field enters the later development stage, so as to maintain the pressure of the stratum and dilute the viscosity of crude oil, thereby improving the recovery ratio of the oil field and achieving the purposes of high and stable yield and the like. Generally, the oilfield water injection mode comprises two modes of layered water injection and general water injection, wherein the layered water injection is to put into a packer in an oil well to separate oil layers with different properties, and then the water injection is performed by using a water distributor, so that the water injection is enhanced for a low permeable layer by controlling the water injection for a high permeable layer, thereby effectively controlling the pressure of the oil layer, controlling the situation that the water content of the oilfield rises too fast to a certain extent, enabling the formation pressure to be always near the original formation pressure, ensuring that the oil well has enough production pressure difference and vigorous liquid production capacity, and further improving the output of the oilfield.
After the packer is put into an oil and gas well, the packer needs to be pressed and set so as to realize the setting of the packer. The water injection pipe column is sealed by adopting a mode that the setting steel ball is matched with the ball seat, and then the packer is pressed and set. However, in production practice, after the ball seat is put into the well for a period of time, the ball seat is easily corroded due to the influence of comprehensive factors such as water quality, underground minerals and the like, and the seal between the corroded setting steel ball and the ball seat is invalid, so that the pipe column is lost, the lost pipe column cannot be normally separated and injected, and only the seal can be changed in operation, so that the diversion rate and the separated water injection qualification rate of the water injection well are influenced. However, the position of ball seat corrosion only appears in the position of contact with the steel ball, and other positions still meet the use requirement, and the whole ball seat of reloading certainly causes the very big waste of resource.
As an improvement, chinese patent of utility model, having the grant number CN210141113U and the grant date of 2020, 3 and 13, discloses a ball seat assembly and a pipe string using the ball seat assembly, wherein the ball seat assembly comprises a mounting seat for connecting with the pipe string, a fluid passage channel for fluid to pass through is arranged on the radial direction of the mounting seat, a ball seat communicated with the fluid passage channel is detachably and hermetically connected in the fluid passage channel, and a sealing port for sealing the fluid passage channel in sealing fit with a sealing ball is arranged on the ball seat. In this scheme, ball seat and mount pad detachable sealing connection, when the ball seat is because of corroding and lead to unable and sealing ball sealing after long-time operation in the pit, only need change the ball seat that appears corroding, and need not to change other parts to unnecessary waste has been reduced. However, the structure is only suitable for the forward washing operation and cannot be applied to the backwashing operation scene; meanwhile, effective blocking cannot be formed on the oil pipe in the process of descending the pipe column into the well.
As a further improvement, the chinese patent of the utility model with the grant number CN201546674U and the grant date of 2010, 8 and 11 discloses a novel multifunctional double-acting valve, which comprises an outer cylinder, a piston (sealing rod), a ball seat, an inner cylinder, wherein the inner cylinder is connected with the outer cylinder, the ball seat and the piston are respectively arranged in the inner cylinder, and the piston is limited by a shear pin and a step arranged in the inner cylinder, so that the plugging and blowout preventing effects on an oil pipe are achieved in the pipe column well descending process, and the back flushing is achieved in the process of pressing and setting. However, as a limit structure is additionally arranged on the inner cylinder to limit the piston, the cross section of a flow passage in the valve body is reduced, and the flow capacity of the pipe column is affected; in addition, during assembly, the ball seat is required to be placed in the outer cylinder, the inner cylinder is sleeved with the sealing ring and then screwed into the outer cylinder, and the ball seat is limited through the cooperation of the inner cylinder and the outer cylinder, so that the structure is complex.
Disclosure of Invention
The utility model aims to provide a ball seat, which solves the problem that the current through-flow capacity of a tubular column is affected due to the complex structure and the limitation of the ball seat. The utility model also aims to provide a tubular column using the ball seat, so as to solve the problem that the through-flow capacity of the tubular column is affected by the ball seat structure.
In order to achieve the above purpose, the ball seat provided by the utility model adopts the following technical scheme:
the ball seat comprises a piston and a tubular seat body, wherein the piston is provided with a sealing position on the tubular seat body and is kept in the sealing position through a locating pin, the tubular seat body is provided with a limiting structure for limiting the axial movement of the piston, and the limiting structure is located below the locating pin.
The beneficial effects of the technical scheme are that: according to the utility model, by improving the prior art, the limiting structure for limiting the axial movement of the piston by the tubular seat body is arranged below the positioning pin, so that the cross section of the through-flow channel of the tubular seat body is not required to be adjusted, the cross section of the through-flow channel of the tubular seat body is kept unchanged while the piston is limited, and the through-flow capacity of the tubular column is further effectively ensured; in addition, through the cooperation of locating pin and limit structure, can prevent effectively that well interior liquid from getting into tubular column when the well down, realize setting and back flushing when pressing.
Further, the limiting structure is provided with a conical surface matched with the piston.
The beneficial effects of the technical scheme are that: by means of the arrangement, the limiting structure is matched with the matching surface of the piston, so that the two are in close matching contact, and limiting and sealing effects are improved.
Further, the piston is provided with a conical matching surface matched with the conical surface, and a cylindrical surface is arranged below the conical matching surface.
The beneficial effects of the technical scheme are that: in the setting, in the process of descending the well, the matching of the piston and the tubular seat body gradually tends to be tight under the action of pressure, so that the sealing effect is improved; in the setting process, the conical surface structure is convenient for the piston to be conveniently separated from the cooperation with the tubular seat body under the action of pressure; the contact area of the piston and the limiting structure can be reduced due to the arrangement of the cylindrical surface, so that the piston is easy to separate when the well is washed, and in addition, the deposition of impurities during the well is effectively prevented.
Further, a limiting ring for axially limiting the ball seat body is arranged on one side, away from the limiting structure, of the tubular seat body.
The beneficial effects of the technical scheme are that: such setting is convenient for the assembly of ball seat body and spacing ring, can prevent simultaneously that the ball seat body from deviating from the tubular seat body when operation such as well washing because of external force effect.
Further, the cross section of the limiting ring is conical.
The beneficial effects of the technical scheme are that: such an arrangement facilitates the ball to fall more easily into the tee.
In order to achieve the above purpose, the pipe column using the ball seat adopts the following technical scheme:
the pipe column using the ball seat comprises a screen pipe, the ball seat is assembled on the upper portion of the screen pipe, the ball seat comprises a piston and a tubular seat body, the piston is provided with a sealing position on the tubular seat body and is kept at the sealing position through a locating pin, the tubular seat body is provided with a limiting structure for limiting the axial movement of the piston, and the limiting structure is located below the locating pin.
The beneficial effects of the technical scheme are that: according to the utility model, by improving the prior art, the limiting structure for limiting the axial movement of the piston by the tubular seat body is arranged below the positioning pin, so that the cross section of the through-flow channel of the tubular seat body is not required to be adjusted, the cross section of the through-flow channel of the tubular seat body is kept unchanged while the piston is limited, and the through-flow capacity of the tubular column is further effectively ensured; in addition, through the cooperation of locating pin and limit structure, can prevent effectively that well interior liquid from getting into tubular column when the well down, realize setting and back flushing when pressing.
Further, the limiting structure is provided with a conical surface matched with the piston.
The beneficial effects of the technical scheme are that: by means of the arrangement, the limiting structure is matched with the matching surface of the piston, so that the two are in close matching contact, and limiting and sealing effects are improved.
Further, the piston is provided with a conical matching surface matched with the conical surface, and a cylindrical surface is arranged below the conical matching surface.
The beneficial effects of the technical scheme are that: in the setting, in the process of descending the well, the matching of the piston and the tubular seat body gradually tends to be tight under the action of pressure, so that the sealing effect is improved; in the setting process, the conical surface structure is convenient for the piston to be conveniently separated from the cooperation with the tubular seat body under the action of pressure; the contact area of the piston and the limiting structure can be reduced due to the arrangement of the cylindrical surface, so that the piston is easy to separate when the well is washed, and in addition, the deposition of impurities during the well is effectively prevented.
Further, a limiting ring for axially limiting the ball seat body is arranged on one side, away from the limiting structure, of the tubular seat body.
The beneficial effects of the technical scheme are that: such setting is convenient for the assembly of ball seat body and spacing ring, can prevent simultaneously that the ball seat body from deviating from the tubular seat body when operation such as well washing because of external force effect.
Further, the cross section of the limiting ring is conical.
The beneficial effects of the technical scheme are that: such an arrangement facilitates the ball to fall more easily into the tee.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure: 1. a tubular seat body; 2. a sphere; 3. a piston; 4. a limiting ring; 5. a ball seat sealing ring; 6. a ball seat body; 7. a piston seal ring; 8. positioning pins;
11. a tee section; 12. a sealing position; 13. and a limiting structure.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The features and capabilities of the present utility model are described in further detail below in connection with the examples.
Example 1 of a string of pipe employing the tee of the present utility model:
as shown in fig. 1, the string in this embodiment is a separate injection string, and in other embodiments, the string may be an injection production string for other purposes. The separate injection string comprises a screen pipe, a ball seat is assembled on the upper portion of the screen pipe, and comprises a tubular seat body 1, a piston 3 and a ball seat body 6 assembled on the tubular seat body 1.
The inner hole of the tubular seat body 1 forms a through-flow channel for circulating liquid, the inner wall surface of the upper part of the tubular seat body 1 is provided with an inner thread connected with a pipe column, the outer wall surface of the lower part is provided with an outer thread connected with a sieve tube, the tubular seat body is provided with a ball seat section 11, a sealing position 12 and a limiting structure 13 which are sequentially connected from top to bottom, wherein the ball seat section 11 is arranged at the lower end of the inner thread, the ball seat section 11 is of a necking structure with a wide upper part and a narrow lower part and is used for supporting a ball body 2 thrown from the upper end of the pipe column and guiding the ball body 2 to fall into the ball seat body 6, so that the ball seat body 6 and the ball body 2 are mutually matched to seal the through-flow channel.
A step-shaped groove is formed in the tubular seat body 1, threads are formed on the wall surface of the groove at the upper part of the tubular seat body, a limiting ring 4 is arranged in the groove at the upper part of the tubular seat body, and the limiting ring 4 is connected with the tubular seat body 1 through the threads; the wall surface of the lower groove is a smooth surface, a ball seat body 6 is assembled in the lower groove, the ball seat body 6 is in sealing fit with the groove, a ball seat sealing ring 5 is assembled between the ball seat body 6 and the tubular seat body 1 in order to strengthen the sealing performance between the ball seat body 6 and the tubular seat body 1, and particularly, a sealing groove is arranged on the tubular seat body 1 at the lower groove, and the ball seat sealing ring 5 is embedded in the sealing groove; in other embodiments, the ball seat seal 5 may be provided on the ball seat body. For better guiding the ball 2 to cooperate with the ball seat body 1, in this embodiment, the stop ring 4 has a conical section identical to the inner wall of the lower end of the internal thread of the tubular seat body 1; thus, the ball seat body 1 is limited in the lower groove by the limiting ring 4, so that the ball seat body 6 can be prevented from falling out of the tubular seat body 1 under the action of external force during well flushing and other operations; the detachable design of ball seat body 6 and spacing ring 4, when ball seat body 1 corrodes in the pit and can't seal with spheroid 6, when leading to the tubular column to leak, use specialized tool to dismantle the ball seat body 6 that appears corroding, and need not to change other parts, has reduced unnecessary extravagant. In this embodiment, the ball seat body 1 adopts 6Cr18Mo stainless steel material, and this material has stronger corrosion resistance, can effectively prolong the life of ball seat body in the pit.
The tubular seat body 1 is also provided with a sealing position 12 for sealing the piston 3, the sealing position 12 is penetrated with the piston 3 along the axial direction of the tubular seat body 1, the piston 3 is kept at the sealing position through the locating pin 8, and the piston 3 can be effectively prevented from falling out of the tubular seat body when entering a well; in order to avoid shearing the positioning pin 8 due to overlarge pressure in a well, the inner wall of the lower end of the sealing position 12 of the tubular seat body 1 is a conical surface, the conical surface forms a limit structure 13 for limiting the axial movement of the piston 3, and the piston 3 is provided with a conical matching surface matched with the limit structure 13, so that the piston 3 and the tubular seat body 1 are matched with each other through the limit structure 13, the axial movement limit of the piston 3 is realized, and meanwhile, the sealing of a through-flow channel of the tubular seat body 1 is further realized; the piston 3 is provided with two annular sealing grooves on the outer peripheral surface of the sealing position 12, a piston sealing ring 7 is arranged in the annular sealing grooves, and the piston 3 is in sealing fit with the sealing position 12 through the piston sealing ring 7, so that a central channel is sealed; the cylindrical surface connected with the conical matching surface is arranged below the conical matching surface, so that the contact area between the piston 3 and the limiting structure 13 can be reduced to a certain extent, and the piston 3 can be conveniently separated from the tubular seat body 1 under the action of pressure. In other embodiments, the piston seal 7 may be provided on a tubular housing.
In this embodiment, the limiting structure 13 is disposed below the locating pin 8, so that the limiting structure 13 can directly utilize the conical surface of the tubular seat body 1 to realize limiting of the piston 3, and further the cross section of the through flow channel of the tubular seat body 1 is not affected, and the through flow of the tubular seat body can be effectively ensured.
When the ball seat in the embodiment is assembled, the ball seat sealing ring 5 is arranged in the sealing groove of the tubular seat body 1, the ball seat body 6 is arranged in the lower smooth groove in the tubular seat body 1, then the limiting ring 4 is connected with the tubular seat body 1 through threads so as to limit the ball seat body 6, the piston 3 provided with the piston sealing ring 7 is penetrated into the sealing position 12, the positioning pin 8 is used for connecting the tubular seat body 1 and the piston 3 so as to limit the piston 3, then the steel ball 2 is put into, and finally the ball seat is connected to the upper part of the sieve tube according to design requirements.
When the ball seat in the embodiment is used, the liquid in the pipe column cannot go upwards due to the sealing and limiting of the piston 3 in the pipe column descending process, so that the liquid in the well is effectively prevented from entering the oil pipe; when the pipe column is in place, the well bore is pressurized, when the pressure in the pipe column is greater than the shearing pressure of the locating pin 8, the piston 3 descends, and meanwhile, the ball body 3 falls to the ball seat body 6 and is in close contact with the ball seat body 6, so that the pipe column is sealed, and setting and back flushing are achieved.
Example 2 of the column of the present utility model:
in example 1 of the pipe string of the present utility model, the stopper has a tapered surface that mates with the piston. In this embodiment, the limiting structure is a step surface matched with the piston, and the piston has a step mating surface matched with the step surface.
Example 3 of the column of the present utility model:
in embodiment 1 of the pipe string of the utility model, the ball seat is installed in a smooth groove in the tubular seat body, and the limit of the ball seat body is realized through a limit ring. In this embodiment, the ball seat is threadably connected to the tubular body.
Example 4 of the column of the present utility model:
in example 3 of the string of the present utility model, the ball seat is threadedly connected to the tubular body. In this embodiment, the ball seat body is not provided with a stop collar on one side away from the stop structure.
Example 5 of the column of the present utility model:
in example 1 of the pipe string of the present utility model, the cross section of the stop collar is tapered. In this embodiment, the cross section of the stop collar is the same diameter as the tee body.
An embodiment of the tee of the present utility model:
the tee of the present utility model is identical to the tee structure of the above-described embodiments of the string and will not be described in detail herein.
The above description is only a preferred embodiment of the present utility model, and the patent protection scope of the present utility model is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A ball seat comprising a piston and a tubular seat body, the piston having a sealing position on the tubular seat body and being held in the sealing position by a locating pin, characterized in that: the tubular seat body is provided with a limiting structure for limiting the axial movement of the piston, and the limiting structure is positioned below the positioning pin.
2. The tee of claim 1, wherein: the limiting structure is provided with a conical surface matched with the piston.
3. The tee of claim 1 or 2, wherein: the piston is provided with a conical matching surface matched with the conical surface, and a cylindrical surface is arranged below the conical matching surface.
4. The tee of claim 1, wherein: one side of the tubular seat body far away from the limiting structure is provided with a limiting ring for axially limiting the ball seat body.
5. The tee of claim 4, wherein: the cross section of the limiting ring is conical.
6. The tubular column comprises a sieve tube, a ball seat is assembled on the upper part of the sieve tube, the ball seat comprises a piston and a tubular seat body, the piston is provided with a sealing position on the tubular seat body and is kept in the sealing position through a locating pin, and the tubular column is characterized in that: the tubular seat body is provided with a limiting structure for limiting the axial movement of the piston, and the limiting structure is positioned below the positioning pin.
7. The tubing string of claim 6, wherein: the limiting structure is provided with a conical surface matched with the piston.
8. A pipe string according to claim 6 or 7, characterized in that: the piston is provided with a conical matching surface matched with the conical surface, and a cylindrical surface is arranged below the conical matching surface.
9. The tubing string of claim 6, wherein: one side of the tubular seat body far away from the limiting structure is provided with a limiting ring for axially limiting the ball seat body.
10. A pipe string according to claim 9, characterized in that: the cross section of the limiting ring is conical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321599252.1U CN220151321U (en) | 2023-06-21 | 2023-06-21 | Ball seat and pipe column using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321599252.1U CN220151321U (en) | 2023-06-21 | 2023-06-21 | Ball seat and pipe column using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220151321U true CN220151321U (en) | 2023-12-08 |
Family
ID=89015483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321599252.1U Active CN220151321U (en) | 2023-06-21 | 2023-06-21 | Ball seat and pipe column using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220151321U (en) |
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2023
- 2023-06-21 CN CN202321599252.1U patent/CN220151321U/en active Active
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