Well cementation float collar float shoe

Abstract

The utility model discloses a well cementation float collar float shoe, which belongs to the technical field of mine excavation, and adopts the technical scheme that the well cementation float collar float shoe comprises a float collar float shoe body, and the bottom of the float collar float shoe body is communicated with a liquid outlet head. By arranging a float collar float shoe body, a liquid outlet head, a check block, a bottom shell, a connecting rod, a spring, a sealing plate, a clamping block, a first sealing gasket, a second sealing gasket, a protection assembly and a through hole, the float collar float shoe body is connected with a connecting pipe, then slurry enters the float collar float shoe body through the connecting pipe, the slurry enters the float collar float shoe body, and then the slurry enters the float collar float shoe body. The pressure of mud pushes a sealing plate and a top protection shell, then the moving sealing plate extrudes a spring located in the top protection shell through the top protection shell, so that the top protection shell retracts towards the interior of a moving groove in a bottom protection shell, and the spring retracts downwards on the outer side of a connecting rod of the spring synchronously; and then the slurry flows to the through hole through the outer sides of the top protective shell and the bottom protective shell.

Description

Technical Field

[0001] The utility model relates to the technical field of mine excavation, in particular to a cementing floating hoop and floating shoe. Background Art

[0002] Float hoop and float shoe are a kind of casing guide shoe or coupling that can generate buoyancy. Because float shoe or float hoop is resistant to high temperature, has good sealing and drillability, and is easy to connect, it can replace guide shoe, casing shoe, etc. Float shoe or float hoop can be used not only for general technical casing and oil layer casing, but also for deep wells, ultra-deep wells and special process wells. There are many types of float hoop and float shoe, the common ones are: cement type float hoop and float shoe, non-drillable float hoop and float shoe, anti-rotation float hoop and float shoe, inserted float hoop and float shoe, aluminum alloy float hoop and float shoe, etc.

[0003] At present, a Chinese utility model with the public number of CN220118093U discloses a spring-type floating collar and floating shoe for cementing. This utility model relates to the field of mine excavation technology, and discloses a spring-type floating collar and floating shoe for cementing, including a spring-type floating collar and floating shoe body and a base layer. The bottom of the spring-type floating collar and floating shoe body is fixedly connected with a liquid outlet head, the inner wall of the spring-type floating collar and floating shoe body is fixedly connected with a stopper, the inner wall of the spring-type floating collar and floating shoe body is fixedly connected with a bottom shell, the inner wall of the bottom shell is fixedly connected with a connecting rod, and the surface of the connecting rod is sleeved with a coil spring. This spring-type floating collar and floating shoe for cementing can prevent mud from entering the conveying pipe again when refluxing by setting a sealing mechanism under the action of the sealing mechanism, thereby affecting the user's pouring of the well wall, thereby affecting the strength of the well wall, and achieving the purpose of increasing the spring-type floating collar and floating shoe body when conveying mud, avoiding mud from reflux under the action of pressure, thereby avoiding affecting the strength of the well wall.

[0004] According to the above patent, the existing cementing float hoop and float shoe are provided with a sealing mechanism, under the action of the sealing mechanism, the mud can be prevented from entering the conveying pipe again when it flows back, so as to facilitate the user to use it for pouring the well wall, and the spring-type float hoop and float shoe body is increased to prevent the mud from flowing back under the action of pressure when conveying the mud, so as to avoid affecting the strength of the well wall. However, the spring used for supporting and retracting is not provided with a protective shielding structure inside the spring-type float hoop and float shoe body, so that when the spring retracts the sealing mechanism, the mud enters the spring-type float hoop and float shoe body and is then discharged through the through hole, which will have a certain impact on the spring, so that the spring is contaminated and corroded, which in turn affects the performance of the spring and reduces the service life of the spring. Therefore, the above patent is improved according to the problems raised. Utility Model Content

[0005] The utility model provides a cementing float hoop and a float shoe, aiming to solve the problem that the existing cementing float hoop and a float shoe are provided with a sealing mechanism, under the action of the sealing mechanism, mud can be prevented from entering the conveying pipe again when it refluxes, so as to facilitate the user to use it for pouring the well wall, and the spring-type float hoop and a float shoe body is added to prevent the mud from refluxing under the action of pressure when conveying the mud, so as to avoid affecting the well wall strength. However, the spring used for supporting and retracting is not provided with a protective shielding structure inside the spring-type float hoop and a float shoe body, so that when the spring retracts the sealing mechanism, the mud enters the spring-type float hoop and a float shoe body and is then discharged through the through hole, which will have a certain impact on the spring, so that the spring is contaminated and corroded, thereby affecting the performance of the spring and reducing the service life of the spring.

[0006] The utility model is implemented as follows: a cementing floating collar and a floating shoe, comprising a floating collar and a floating shoe body, the bottom of the floating collar and the floating shoe body being connected to a liquid outlet head, a stopper being fixedly connected to the top side of the floating collar and the floating shoe body, a bottom side of the floating collar and the floating shoe body being fixedly connected to a bottom shell, a connecting rod being arranged inside the bottom shell, the bottom of the connecting rod passing through the bottom side of the bottom shell and being slidably connected, a spring being sleeved on the outer side of the connecting rod, a sealing plate being fixedly connected to the top of the connecting rod, a clamping block being fixedly connected to the outer side of the sealing plate, a first sealing gasket being fixedly connected to the outer side of the sealing plate, the outer side of the first sealing gasket being in contact with the inner side of the stopper, a second sealing gasket being fixedly connected to the outer side of the clamping block, a protective component being arranged on the outer side of the connecting rod and the spring, and through holes being opened on the inner side of the bottom shell;

[0007] The protective assembly includes a bottom protective shell, a movable groove and a top protective shell, the bottom protective shell is fixedly connected to the bottom side of the bottom shell, the bottom protective shell is located on the outside of the connecting rod and the spring, the bottom side of the bottom protective shell contacts the bottom of the spring, the bottom side of the bottom protective shell is connected through the bottom of the connecting rod, the movable groove is opened on the outside of the top of the bottom protective shell, the top protective shell is slidably connected to the inside of the movable groove, the top protective shell is located on the outside of the connecting rod and the spring, the top of the top protective shell is fixedly connected to the bottom of the sealing plate, and the top side of the top protective shell is fixedly connected to the top of the spring.

[0008] In order to further enhance the stability and smoothness of the sliding of the second sealing gasket, as a preferred embodiment of the cementing floating collar and floating shoe of the utility model, snap-in grooves are provided around the inside of the bottom shell, and the inside of the snap-in grooves contacts the outside of the second sealing gasket.

[0009] In order to achieve the effect of facilitating the use of external pipelines of the floating collar and floating shoe body, as a preferred cementing floating collar and floating shoe of the utility model, the top side of the floating collar and floating shoe body is provided with a connecting thread, and the connecting thread is concave-convex shape.

[0010] In order to increase the sealing effect of the movable groove when the top protective shell slides, as a preferred cementing floating hoop and floating shoe of the utility model, a sealing ring is bonded to the inside of the movable groove, and the sealing ring is made of rubber material. The inner side of the sealing ring contacts the outer side of the top protective shell.

[0011] In order to further improve the sealing performance of the sealing ring, as a preferred embodiment of the cementing float collar and float shoe of the utility model, the sealing ring is provided with sealing lines inside, and the sealing lines are concave-convex shapes.

[0012] In order to enhance the moisture-proof and water-proof performance of the bottom protective shell, as a preferred embodiment of the cementing floating hoop and floating shoe of the utility model, a moisture-proof and water-proof layer is bonded to the inside of the bottom protective shell, and the moisture-proof and water-proof layer is made of moisture-proof material.

[0013] In order to achieve the effect of absorbing moisture inside the bottom protective shell and keeping it dry, as a preferred embodiment of the cementing float hoop and float shoe of the utility model, a moisture-absorbing layer is bonded to the inside of the moisture-proof and waterproof layer, and the moisture-absorbing layer is made of a desiccant material.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The cementing floating hoop and floating shoe are provided with a floating hoop and floating shoe body, a liquid outlet head, a stopper, a bottom shell, a connecting rod, a spring, a sealing plate, a clamping block, a first sealing gasket, a second sealing gasket, a protective component and a through hole, so as to connect the floating hoop and floating shoe body with a connecting pipe, and then make the mud pass through the connecting pipe and enter the floating hoop and floating shoe body. The mud enters the floating hoop and floating shoe body, and the pressure of the mud pushes the sealing plate and the top protective shell. Then the moving sealing plate squeezes the spring located in the top protective shell through the top protective shell, so that the top protective shell retracts into the inside of the moving groove in the bottom protective shell, and the synchronous spring retracts downward on the outside of its connecting rod. Then the mud passes through the connecting pipe, and the spring is pressed against the bottom protective shell. The outer sides of the top protective shell and the bottom protective shell flow to the through hole, and then the mud is discharged from the liquid outlet head into the well wall through the through hole. In this process, the top protective shell and the bottom protective shell protect their springs to prevent the springs from being contaminated and corroded, thereby ensuring the performance of the springs and increasing the service life of the springs. Then, when the pressure in the well wall causes the mud to flow back, the mud pushes the sealing plate and the clamping block to move upward, and the sealing effect of the sealing plate and the block is increased under the action of the first sealing gasket and the second sealing gasket, which can avoid the sealing plate from moving under the influence of external force, thereby increasing the sealing effect of the floating hoop and floating shoe body, and the whole is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the overall structure diagram of the cementing float collar and float shoe of the utility model;

[0017] Figure 2 It is a schematic diagram of the planar structure of the floating hoop and floating shoe body of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the sealing plate in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the protection component in the utility model;

[0020] Figure 5 For the utility model Figure 4 Enlarged schematic diagram of point A.

[0021] In the figure, 1. floating hoop and floating shoe body; 2. liquid outlet head; 3. block; 4. bottom shell; 5. connecting rod; 6. spring; 7. sealing plate; 8. snap-in block; 9. first sealing gasket; 10. second sealing gasket; 11. protective assembly; 1101. bottom protective shell; 1102. movable groove; 1103. top protective shell; 12. through hole; 13. snap-in groove; 14. sealing ring; 15. moisture-proof and water-insulating layer; 16. hygroscopic layer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0024] See also Figure 1-5The utility model provides a technical solution: a cementing floating hoop and floating shoe, comprising a floating hoop and floating shoe body 1, the bottom of which is connected to a liquid outlet head 2, a stopper 3 is fixedly connected to the top side of the floating hoop and floating shoe body 1, a bottom side of the floating hoop and floating shoe body 1 is fixedly connected to a bottom shell 4, a connecting rod 5 is arranged inside the bottom shell 4, the bottom of the connecting rod 5 passes through the bottom side of the bottom shell 4 and is slidably connected, a spring 6 is sleeved on the outer side of the connecting rod 5, a sealing plate 7 is fixedly connected to the top of the connecting rod 5, a clamping block 8 is fixedly connected to the outer side of the sealing plate 7, a first sealing gasket 9 is fixedly connected to the outer side of the sealing plate 7, the outer side of the first sealing gasket 9 contacts the inner side of the stopper 3, a second sealing gasket 10 is fixedly connected to the outer side of the clamping block 8, a protective component 11 is arranged on the outer side of the connecting rod 5 and the spring 6, and through holes 12 are opened around the inner bottom side of the bottom shell 4;

[0025] The protective assembly 11 includes a bottom protective shell 1101, a movable groove 1102 and a top protective shell 1103. The bottom protective shell 1101 is fixedly connected to the bottom side of the bottom shell 4, the bottom protective shell 1101 is located on the outside of the connecting rod 5 and the spring 6, the bottom side of the bottom protective shell 1101 contacts the bottom of the spring 6, the bottom side of the bottom protective shell 1101 is connected through the bottom of the connecting rod 5, the movable groove 1102 is opened on the outside of the top of the bottom protective shell 1101, the top protective shell 1103 is slidably connected to the inside of the movable groove 1102, the top protective shell 1103 is located on the outside of the connecting rod 5 and the spring 6, the top of the top protective shell 1103 is fixedly connected to the bottom of the sealing plate 7, and the top side of the top protective shell 1103 is fixedly connected to the top of the spring 6.

[0026] In this embodiment: by providing a floating hoop and floating shoe body 1, a liquid outlet head 2, a stopper 3, a bottom shell 4, a connecting rod 5, a spring 6, a sealing plate 7, a clamping block 8, a first sealing gasket 9, a second sealing gasket 10, a protective assembly 11 and a through hole 12, the floating hoop and floating shoe body 1 is connected to the connecting pipe, and then the mud passes through the connecting pipe into the floating hoop and floating shoe body 1, and the mud enters the floating hoop and floating shoe body 1, and the pressure of the mud pushes the sealing plate 7 and the top protective shell 1103, and then the moving sealing plate 7 passes through the top protective shell 1103 to squeeze the spring 6 located in the top protective shell 1103, so that the top protective shell 1103 retracts into the moving groove 1102 in the bottom protective shell 1101, and the synchronous spring 6 retracts downward on the outside of its connecting rod 5, Then the mud flows to the through hole 12 through the outside of the top protective shell 1103 and the bottom protective shell 1101, and then the mud is discharged from the liquid outlet head 2 into the well wall through the through hole 12. In this process, the top protective shell 1103 and the bottom protective shell 1101 protect the spring 6 to prevent the spring 6 from being contaminated and corroded, thereby ensuring the performance of the spring 6 and increasing the service life of the spring 6. Then, when the pressure in the well wall reverses the mud, the mud pushes the sealing plate 7 and the clamping block 8 to move upward, and the sealing effect of the sealing plate 7 and the block 3 is increased under the action of the first sealing gasket 9 and the second sealing gasket 10, which can avoid the movement of the sealing plate 7 under the influence of external force, thereby increasing the sealing effect of the floating hoop and floating shoe body 1, and the whole is more convenient to use.

[0027] As a technical optimization solution of the present invention, snap-fit ​​grooves 13 are provided around the inside of the bottom shell 4 , and the inside of the snap-fit ​​grooves 13 contacts the outside of the second sealing gasket 10 .

[0028] In this embodiment, the clamping groove 13 is provided to further enhance the stability and smoothness of the sliding of the second sealing pad 10, so as to facilitate the use.

[0029] As a technical optimization solution of the utility model, a connecting thread is provided on the top side of the inside of the floating collar and floating shoe body 1, and the connecting thread is a concave-convex shape.

[0030] In this embodiment, a concave-convex connection thread is provided on the top side of the inner part of the float collar and float shoe body 1, so as to facilitate the use of the float collar and float shoe body 1 connected to an external pipeline.

[0031] As a technical optimization solution of the present invention, a sealing ring 14 is bonded to the inside of the movable groove 1102 . The sealing ring 14 is made of rubber material, and the inner side of the sealing ring 14 contacts the outer side of the top protective shell 1103 .

[0032] In this embodiment, by providing a sealing ring 14, the sealing effect of the interior of the movable groove 1102 on the top protective shell 1103 when it slides can be achieved, so as to facilitate use.

[0033] As a technical optimization solution of the present invention, sealing lines are provided inside the sealing ring 14, and the sealing lines are concave-convex shapes.

[0034] In this embodiment, by providing concave-convex sealing lines inside the sealing ring 14, the sealing performance of the sealing ring 14 can be further improved to facilitate use.

[0035] As a technical optimization solution of the present invention, a moisture-proof and waterproof layer 15 is bonded to the interior of the bottom protective shell 1101, and the moisture-proof and waterproof layer 15 is made of moisture-proof material.

[0036] In this embodiment, by providing a moisture-proof and waterproof layer 15, the moisture-proof and waterproof performance of the bottom protective shell 1101 can be enhanced to facilitate use.

[0037] As a technical optimization solution of the utility model, a moisture absorbing layer 16 is bonded inside the moisture-proof and water-insulating layer 15, and the moisture absorbing layer 16 is made of a desiccant material.

[0038] In this embodiment, by providing a moisture absorbing layer 16, moisture can be absorbed inside the bottom protective shell 1101 to maintain a dry use effect, which is convenient for use.

[0039] Working principle: First, connect the float hoop and the floating shoe body 1 with the connecting pipe, and then make the mud pass through the connecting pipe into the float hoop and the floating shoe body 1. The mud enters the float hoop and the floating shoe body 1, and the pressure of the mud pushes the sealing plate 7 and the top protective shell 1103. Then the moving sealing plate 7 passes through the top protective shell 1103 to squeeze the spring 6 located in the top protective shell 1103, so that the top protective shell 1103 retracts into the moving groove 1102 in the bottom protective shell 1101, and the synchronous spring 6 retracts downward on the outside of its connecting rod 5. Then the mud passes through the outside of the top protective shell 1103 and the bottom protective shell 1101 and flows to the passage. Hole 12, and then the mud is discharged from the liquid outlet head 2 into the well wall through the through hole 12. In this process, the top protective shell 1103 and the bottom protective shell 1101 protect the spring 6, so as to prevent the spring 6 from being contaminated and corroded, thereby ensuring the performance of the spring 6 and increasing the service life of the spring 6. Then, when the pressure in the well wall reverses the mud, the mud pushes the sealing plate 7 and the clamping block 8 to move upward, and the sealing effect of the sealing plate 7 and the stopper 3 is increased under the action of the first sealing gasket 9 and the second sealing gasket 10, which can avoid the sealing plate 7 from moving under the influence of external force, thereby increasing the sealing effect of the floating hoop and floating shoe body 1.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cementing float collar and a float shoe, comprising a float collar and a float shoe body (1), characterized in that: The bottom of the float collar and float shoe body (1) is connected to a liquid outlet head (2), the top side of the float collar and float shoe body (1) is fixedly connected to a stopper (3), the bottom side of the float collar and float shoe body (1) is fixedly connected to a bottom shell (4), a connecting rod (5) is arranged inside the bottom shell (4), the bottom of the connecting rod (5) passes through the bottom side of the bottom shell (4) and is slidably connected, a spring (6) is sleeved on the outer side of the connecting rod (5), and the top of the connecting rod (5) is fixedly connected to A sealing plate (7), wherein the outer sides of the sealing plate (7) are fixedly connected to clamping blocks (8), the outer sides of the sealing plate (7) are fixedly connected to a first sealing gasket (9), the outer side of the first sealing gasket (9) contacts the inner side of the stopper (3), the outer side of the clamping block (8) is fixedly connected to a second sealing gasket (10), the outer sides of the connecting rod (5) and the spring (6) are provided with protective components (11), and the inner sides of the bottom side of the bottom shell (4) are provided with through holes (12); The protection assembly (11) comprises a bottom protection shell (1101), a movable groove (1102) and a top protection shell (1103); the bottom protection shell (1101) is fixedly connected to the bottom side of the bottom shell (4); the bottom protection shell (1101) is located outside the connecting rod (5) and the spring (6); the bottom side of the bottom protection shell (1101) contacts the bottom of the spring (6); the bottom side of the bottom protection shell (1101) contacts the bottom of the connecting rod (5); The bottom protective shell (1101) is connected through the top, the movable groove (1102) is opened on the outer side of the top of the bottom protective shell (1101), the top protective shell (1103) is slidably connected to the inside of the movable groove (1102), the top protective shell (1103) is located on the outside of the connecting rod (5) and the spring (6), the top of the top protective shell (1103) is fixedly connected to the bottom of the sealing plate (7), and the top side inside the top protective shell (1103) is fixedly connected to the top of the spring (6).

2. The cementing floating collar and floating shoe according to claim 1, characterized in that: The bottom shell (4) is provided with clamping grooves (13) on all four sides thereof, and the inside of the clamping grooves (13) is in contact with the outside of the second sealing gasket (10).

3. The cementing floating collar and floating shoe according to claim 1, characterized in that: A connecting thread is provided on the top side of the floating collar and floating shoe body (1), and the connecting thread is in a concave-convex shape.

4. The cementing floating collar and floating shoe according to claim 1, characterized in that: A sealing ring (14) is bonded inside the movable groove (1102), the sealing ring (14) is made of rubber material, and the inner side of the sealing ring (14) is in contact with the outer side of the top protective shell (1103).

5. The cementing floating collar and floating shoe according to claim 4, characterized in that: The sealing ring (14) is provided with sealing lines inside, and the sealing lines are in a concave-convex shape.

6. The cementing floating collar and floating shoe according to claim 1, characterized in that: A moisture-proof and water-insulating layer (15) is bonded to the interior of the bottom protective shell (1101), and the moisture-proof and water-insulating layer (15) is made of moisture-proof material.

7. The cementing floating collar and floating shoe according to claim 6, characterized in that: A hygroscopic layer (16) is bonded inside the moisture-proof and water-insulating layer (15), and the hygroscopic layer (16) is made of a desiccant material.

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