CN214997556U - Sealing device for well cementation wellhead - Google Patents
Sealing device for well cementation wellhead Download PDFInfo
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- CN214997556U CN214997556U CN202121653929.6U CN202121653929U CN214997556U CN 214997556 U CN214997556 U CN 214997556U CN 202121653929 U CN202121653929 U CN 202121653929U CN 214997556 U CN214997556 U CN 214997556U
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Abstract
The utility model discloses a sealing device of well cementation well head relates to the well head sealing technology field, including the tube-shape fixing base that sets up on the well head and the sealed lid that sets up at tube-shape fixing base top, there are many vertical direction spacing grooves that set up according to the circumference equipartition on the tube-shape fixing base inner wall, be provided with the sealing base of joint in direction spacing groove bottom in the tube-shape fixing base, set up one-level composite seal ring between sealing base top and the sealed lid, one-level composite seal ring edge extends to between tube-shape fixing base and the sealed lid, and the inside special-shaped hole that link up of both ends about being provided with of sealing base, is provided with the second grade elasticity shutoff mechanism that is used for shutoff special-shaped hole in the special-shaped hole; the utility model discloses rational in infrastructure, double seal, sealed reliable advantage.
Description
Technical Field
The utility model relates to a well head sealing technique field, more specifically are sealing device technical field who relates to well cementation well head.
Background
Well cementation, namely, the construction operation of setting a casing into a well and injecting cement into an annular space between the well and the casing, which is an indispensable important link in the well drilling and completion operation process and comprises casing setting and cement injection, wherein the well cementation technology is a multidisciplinary comprehensive application technology and has the characteristics of systematicness, disposability and short time, and the main purpose of well cementation is to protect and support the casing in an oil-gas well and seal off oil, gas and water and other strata; the existing well cementation wellhead sealing device is poor in sealing performance, can generate the conditions of air leakage, water leakage and the like, and cannot meet the current use requirements.
The well cementation wellhead sealing device in the prior art is poor in sealing performance, and after the well cementation wellhead sealing device is used for a long time, the sealing effect of the sealing device is gradually weakened, so that oil gas in a wellhead leaks out.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: in order to solve the technical problem, the utility model provides a sealing device of well cementation well head.
The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:
the utility model provides a sealing device of well cementation well head, is including setting up the tube-shape fixing base on the well head and setting up the sealed lid at tube-shape fixing base top, there is the direction spacing groove of many vertical settings according to the circumference equipartition on the tube-shape fixing base inner wall, be provided with the sealing base of joint in direction spacing tank bottom in the tube-shape fixing base, set up one-level composite seal circle between sealing base top and the sealed lid, one-level composite seal circle edge extends to between tube-shape fixing base and the sealed lid, the inside dysmorphism hole that link up in both ends about being provided with of sealing base, the downthehole second grade elasticity shutoff mechanism that is used for shutoff dysmorphism hole that is provided with of dysmorphism.
Preferably, the equal symmetry of one-level composite seal circle upper and lower surface is provided with two concentric seal ring grooves, the sealing cover bottom be provided with two with one-level composite seal circle upper surface two seal ring groove one-to-one complex bottom bulge loops, the sealing base top be provided with two with one-level composite seal circle lower surface two seal ring groove one-to-one complex top bulge loops.
Preferably, the special-shaped hole is an upper cylindrical hole and a lower conical hole which are communicated with each other, the second-stage elastic plugging mechanism comprises a conical plugging block which is located in the lower conical hole and is matched with the lower conical hole in shape, and a plurality of elastic connection mechanisms which are uniformly distributed in the upper cylindrical hole according to the circumference and have the same structure, and the lower end of each elastic connection mechanism is connected with the conical plugging block.
Preferably, the taper of the conical plugging block is the same as that of the lower-end conical hole.
Preferably, the elastic connection mechanism comprises a connecting plate fixed on the inner wall of the upper end cylindrical hole through a bolt assembly A, a mounting plate arranged below the connecting plate and a restoring spring arranged below the mounting plate and connected with the top of the conical plugging block, and a reinforcing plate is arranged between the connecting plate and the mounting plate.
Preferably, the equal altitude on the sealing base lateral wall is provided with a plurality of with many joint pieces that lead spacing groove one-to-one.
Preferably, a circle of bearing lug is arranged on the top of the cylindrical fixing seat in an outgoing mode, and the cylindrical fixing seat and the sealing cover are detachably connected through a bolt component B penetrating through the sealing cover and the bearing lug
The utility model has the advantages as follows:
1. the utility model has the advantages of reasonable design, realize double-seal effect through setting up of one-level composite seal circle and second grade elasticity shutoff mechanism, life is longer. The conical plugging block and the elastic connecting mechanism of the secondary elastic plugging mechanism can effectively plug the end of the conical hole in the special-shaped hole under the action of oil-gas pressure in the well mouth, so that the conical plugging block is in close contact with the conical hole at the lower end, and the sealing effect of the plugging core is further enhanced. Because of elastic connection mechanism's setting, the taper shutoff has certain buffer space, and the elastic component axial direction removal can be followed to the taper shutoff, makes the utility model discloses good antidetonation effect has.
2. The equal symmetry of one-level composite seal ring upper and lower surface is provided with two endocentric sealed annular, sealed lid bottom be provided with two with the one-level composite seal ring upper surface two sealed annular one-by-one complex bottom bulge loops, the sealing base top be provided with two with one-level composite seal ring lower surface two sealed annular one-by-one complex top bulge loops, the setting of upper and lower surface twice sealed annular has further strengthened sealed effect.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the structure of the elastic connection mechanism;
FIG. 3 is a schematic structural diagram of a primary composite seal ring;
reference numerals: the sealing structure comprises a sealing cover 1, a sealing cover 2, a primary composite sealing ring 2, a sealing ring groove 2-1, an elastic connecting mechanism 3, a reinforcing tie plate 3-1, a bolt component A3-3, a connecting plate 3-4, a mounting plate 3-5, a restoring spring 3-5, a cylindrical fixing seat 4, a conical sealing block 5, a guide limiting groove 6, a sealing base 7 and a bolt component B8.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as 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 present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "up", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1 to 3, this embodiment provides a sealing device of well cementation well head, including setting up tube-shape fixing base 4 on the well head and setting up the sealed lid 1 at tube-shape fixing base 4 top, there are many vertical direction spacing grooves 6 that set up according to the circumference equipartition on the 4 inner walls of tube-shape fixing base, be provided with the sealing base 7 of joint in direction spacing groove 6 bottom in the tube-shape fixing base 4, set up one-level composite seal ring 2 between sealing base 7 top and the sealed lid 1, 2 edges of one-level composite seal ring extend to between tube-shape fixing base 4 and the sealed lid 1, the inside dysmorphism hole that link up in both ends about being provided with of sealing base 7, the downthehole second grade elasticity shutoff mechanism that is used for shutoff dysmorphism hole that is provided with of dysmorphism.
The upper surface and the lower surface of the first-level composite seal ring 2 are symmetrically provided with two concentric seal ring grooves 2-1, the bottom of the seal cover 1 is provided with two bottom convex rings which are matched with the two seal ring grooves 2-1 on the upper surface of the first-level composite seal ring 2 one by one, and the top of the seal base 7 is provided with two top convex rings which are matched with the two seal ring grooves 2-1 on the lower surface of the first-level composite seal ring 2 one by one.
The special-shaped hole is an upper end cylindrical hole and a lower end conical hole which are communicated with each other, the second-stage elastic plugging mechanism comprises a conical plugging block 5 which is positioned in the lower end conical hole and is matched with the lower end conical hole in shape, a plurality of elastic connecting mechanisms 3 which are uniformly distributed in the upper end cylindrical hole according to the circumference and have the same structure, and the lower end of each elastic connecting mechanism 3 is connected with the conical plugging block 5.
The taper of the conical plugging block 5 is the same as that of the lower end conical hole.
This embodiment, realize double seal effect, life is longer through setting up of one-level composite seal circle and second grade elasticity shutoff mechanism. The conical plugging block and the elastic connecting mechanism of the secondary elastic plugging mechanism can effectively plug the end of the conical hole in the special-shaped hole under the action of oil-gas pressure in the well mouth, so that the conical plugging block is in close contact with the conical hole at the lower end, and the sealing effect of the plugging core is further enhanced. Because of elastic connection mechanism's setting, the taper shutoff has certain buffer space, and the elastic component axial direction removal can be followed to the taper shutoff, makes the utility model discloses good antidetonation effect has.
Example 2
The embodiment is further optimized on the basis of embodiment 1, and specifically comprises the following steps:
the elastic connecting mechanism 3 comprises a connecting plate 3-3 fixed on the inner wall of the cylindrical hole at the upper end through a bolt component A3-2, a mounting plate 3-4 arranged below the connecting plate 3-3 and a restoring spring 3-5 arranged below the mounting plate 3-4 and connected with the top of the conical plugging block 5, and a reinforcing tie plate 3-1 is arranged between the connecting plate 3-3 and the mounting plate 3-4.
The equal altitude on the sealing base 7 lateral wall is provided with a plurality of joint pieces with many direction spacing groove 6 one-to-one. The structure is convenient for mounting and dismounting the sealing base
The top of the cylindrical fixed seat 4 is provided with a circle of bearing lugs, and the cylindrical fixed seat 4 and the sealing cover 1 are detachably connected through a bolt component B8 which penetrates through the sealing cover 1 and the bearing lugs. The annular bearing lug is convenient to install and disassemble.
Claims (7)
1. The utility model provides a sealing device of well cementation well head, is including setting up tube-shape fixing base (4) on the well head and setting up sealed lid (1) at tube-shape fixing base (4) top, its characterized in that, there are direction spacing groove (6) of many vertical settings according to the circumference equipartition on tube-shape fixing base (4) inner wall, be provided with sealing base (7) of joint in direction spacing groove (6) bottom in tube-shape fixing base (4), set up one-level composite seal circle (2) between sealing base (7) top and sealed lid (1), one-level composite seal circle (2) edge extends to between tube-shape fixing base (4) and sealed lid (1), and sealing base (7) inside is provided with the dysmorphism hole that both ends link up from top to bottom, is provided with the second grade elasticity shutoff mechanism that is used for shutoff dysmorphism hole in the dysmorphism downthehole.
2. The sealing device for the well cementation wellhead as claimed in claim 1, wherein the upper and lower surfaces of the primary composite sealing ring (2) are symmetrically provided with two concentric sealing ring grooves (2-1), the bottom of the sealing cover (1) is provided with two bottom convex rings which are matched with the two sealing ring grooves (2-1) on the upper surface of the primary composite sealing ring (2) one by one, and the top of the sealing base (7) is provided with two top convex rings which are matched with the two sealing ring grooves (2-1) on the lower surface of the primary composite sealing ring (2) one by one.
3. The sealing device for the well cementation wellhead as claimed in claim 1, wherein the special-shaped hole is an upper end cylindrical hole and a lower end conical hole which are communicated with each other, the secondary elastic plugging mechanism comprises a conical plugging block (5) which is positioned in the lower end conical hole and is matched with the lower end conical hole in shape, a plurality of elastic connecting mechanisms (3) which are same in structure and are uniformly distributed in the upper end cylindrical hole according to the circumference, and the lower end of each elastic connecting mechanism (3) is connected with the conical plugging block (5).
4. A sealing device of a cemented wellhead according to claim 3 characterised in that the taper of the conical block (5) is the same as the taper of the lower conical bore.
5. A sealing device of a well cementation wellhead as claimed in claim 3 characterized in that the resilient connection means (3) comprises a connection plate (3-3) fixed on the inner wall of the upper end cylindrical hole by a bolt assembly a (3-2), a mounting plate (3-4) arranged below the connection plate (3-3) and a restoring spring (3-5) arranged below the mounting plate (3-4) and connected with the top of the conical plugging block (5), a strengthening tie plate (3-1) is arranged between the connection plate (3-3) and the mounting plate (3-4).
6. The sealing device for the well cementation wellhead as claimed in claim 1, wherein the side wall of the sealing base (7) is provided with a plurality of clamping blocks corresponding to the plurality of guide limiting grooves (6) at equal heights.
7. The sealing device for the well cementation wellhead as claimed in claim 1, characterized in that a circle of bearing lugs are arranged at the top of the cylindrical fixed seat (4) in a outgoing manner, and the cylindrical fixed seat (4) and the sealing cover (1) are detachably connected through a bolt assembly B penetrating through the sealing cover (1) and the bearing lugs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121653929.6U CN214997556U (en) | 2021-07-20 | 2021-07-20 | Sealing device for well cementation wellhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121653929.6U CN214997556U (en) | 2021-07-20 | 2021-07-20 | Sealing device for well cementation wellhead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214997556U true CN214997556U (en) | 2021-12-03 |
Family
ID=79124021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121653929.6U Active CN214997556U (en) | 2021-07-20 | 2021-07-20 | Sealing device for well cementation wellhead |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214997556U (en) |
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2021
- 2021-07-20 CN CN202121653929.6U patent/CN214997556U/en active Active
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