Telescopic rotary float shoe
By designing telescopic rotating floating shoes, using hydraulic motors to drive the floating shoe pipe body to rotate, and installing broken drill beads on the lead hat, the existing floating shoes are solved, and the flexible rotation of floating shoes in the drilling well and the effective treatment of hard gravel is achieved.
Patent Information
- Application Number
- CN202421632694.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The lead cap of existing floating shoes cannot rotate, resulting in inflexibility when bypassing the protrusions in the well and dealing with hard gravel in the drilling well, which is prone to jamming and damage.
A telescopic rotary floating shoe is designed, which uses a hydraulic motor to drive the floating shoe pipe body to rotate, and a crushed drill bead is installed on the guide hat to crush the gravel on the well wall. At the same time, the cement slurry is squeezed to the well wall with a guide block to fix it.
The flexible rotation of the floating shoes in the drilling well is achieved, which can bypass the obstacles in the well and treat hard gravel by crushing the drilling beads to avoid damage to the floating shoes.
Smart Images
Figure CN222686646U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil field cementing, in particular to a telescopic rotating floating shoe. Background Art
[0002] The float shoe is one of the accessories of oil drilling equipment and is an essential tool for cementing construction. It is connected to the end of the casing string and acts as a guide shoe and a back pressure valve. The main function of the float shoe is to guide the casing into the well smoothly during the casing entry process, and prevent the cement slurry from flowing back into the casing. The float shoe is usually equipped with a one-way valve inside, which allows the drilling fluid to flow from the casing to the annulus, but prevents the cement slurry in the annulus from flowing back. In actual drilling and production, the role of the float shoe is very important. It 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. Its powerful role determines its quality requirements, and it needs to have the characteristics of high temperature resistance, excellent sealing and drillability.
[0003] Common structural components of floating shoes: Body: Tubular, the top end is connected to the casing in series, and the bottom end is connected to the guide shoe cap. A valve body and a valve cover are arranged in the body, the valve body has a flow hole, the valve cover has a second pin hole, the first pin hole and the second pin hole are penetrated by a pin shaft, and a torsion spring is mounted on the pin shaft, and the torsion spring abuts against the valve body and the valve cover, so that the valve cover can be rotated to open or close the flow hole. A side hole is also arranged on the body for discharging cement slurry. Guide shoe cap: Conical tube-shaped, the large end is connected to the bottom end of the body, and the small end is blocked with a plug. The function of the guide shoe cap is to guide the casing into the well smoothly, and at the same time prevent the cement slurry from flowing back into the casing. Plug: Removably block the opening of the small end of the guide shoe cap. The plug includes a first column section and a second column section, the first column section is inserted into the opening of the small end of the guide shoe cap, and the second column section is provided with an operating structure to operate the plug.
[0004] The existing float shoe has a body and a guide shoe cap connected by threads, and the guide shoe cap cannot rotate, which is not conducive to flexibly bypassing obstructions such as protrusions in the well. When the casing is guided downward, the float shoe is stuck and damaged. In addition, the harder gravel in the well is easy to get stuck on the float shoe head, causing damage to the float shoe. Utility Model Content
[0005] In order to make up for the above shortcomings, the utility model provides a telescopic rotating float shoe, which aims to improve the problem that the guide shoe cap of the float shoe in the prior art cannot rotate, which is not conducive to flexibly bypassing the protrusions in the well, and the gravel on the well wall is easy to get stuck on the float shoe head.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a telescopic rotating float shoe, comprising a float shoe tube body, a rotating disk is fixedly connected to the middle and upper part of the outer side of the float shoe tube body, a rotating groove is opened on the inner side of the rotating disk, a rotating buckle is rotatably connected inside the rotating groove, a liquid guide tube is fixedly connected to the inner side of the rotating buckle, the four corners of the top of the inner wall of the liquid guide tube are fixedly connected to motor fixing frames, a hydraulic motor is fixedly connected to the middle part between the motor fixing frames, a rotating shaft is rotatably connected to the middle part of the bottom end of the hydraulic motor, a threaded seat is threadedly connected to the bottom end of the inner wall of the float shoe tube body, a guide shoe cap is fixedly connected to the bottom end of the threaded seat, broken drill beads are fixedly installed on the outer side of the guide shoe cap at equal intervals, a guide block is fixedly connected to the bottom of the outer side of the float shoe tube body, and a float shoe fixing frame is fixedly connected to the top of the inner wall of the float shoe tube body.
[0007] As a further description of the above technical solution:
[0008] A thread groove is provided on the bottom side of the inner wall of the float shoe tube, and a thread groove is provided on the outer side of the thread seat.
[0009] As a further description of the above technical solution:
[0010] The middle and lower parts of the left and right sides of the shoe cap are provided with injection ports.
[0011] As a further description of the above technical solution:
[0012] A valve body is fixedly connected to the middle and lower part of the inner wall of the float shoe tube, and a pin is slidably connected to the middle part of the top end of the valve body.
[0013] As a further description of the above technical solution:
[0014] A plug is fixedly connected to the middle of the top end of the pin shaft, and a shaft seat is fixedly connected to the middle of the bottom end of the pin shaft.
[0015] As a further description of the above technical solution:
[0016] The four corners of the top end of the valve body are all provided with flow holes.
[0017] As a further description of the above technical solution:
[0018] A return spring is sleeved in the middle and upper part of the outer side of the pin shaft.
[0019] As a further description of the above technical solution:
[0020] A valve cover is fixedly connected to the middle and upper part of the inner wall of the float shoe tube body, and a through opening is opened in the middle part of the top of the valve cover.
[0021] The utility model has the following beneficial effects:
[0022] 1. In the utility model, the float shoe tube body on the float shoe fixing frame is driven to rotate by a hydraulic motor, so that the float shoe rotates in the well, bypasses the resistance point, and smoothly installs the guide pipe.
[0023] 2. In the utility model, the hard gravel at the well wall is crushed by the crushing drill beads on the guide shoe cap, and the gravel is squeezed to the well wall under the extrusion of the guide block to prevent the gravel from getting stuck in the guide pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 A three-dimensional diagram of a telescopic rotating floating shoe proposed by the utility model;
[0025] Figure 2 This is a structural schematic diagram of a guide shoe cap of a telescopic rotating float shoe proposed by the utility model;
[0026] Figure 3 This is a schematic cross-sectional structure diagram of a liquid guide tube of a telescopic rotating float shoe proposed by the utility model;
[0027] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of a floating shoe tube body of a telescopic rotating floating shoe.
[0028] Legend:
[0029] 1. Float shoe body; 2. Guide shoe cap; 3. Valve body; 4. Valve cover; 5. Pin shaft; 6. Shaft seat; 7. Plug; 8. Return spring; 9. Flow hole; 10. Rotation groove; 11. Through port; 12. Broken drill bead; 13. Injection port; 14. Threaded seat; 15. Threaded groove; 16. Float shoe fixing frame; 17. Hydraulic motor; 18. Rotation shaft; 19. Motor fixing frame; 20. Rotation buckle; 21. Rotation disk; 22. Guide block; 23. Liquid guide tube. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] Reference Figure 1 and Figure 3-Figure 4The utility model provides an embodiment: a telescopic rotating float shoe, including a float shoe body 1, a rotating disk 21 is fixedly connected to the middle and upper part of the outer side of the float shoe body 1, a rotating groove 10 is opened inside the rotating disk 21, a rotating buckle 20 is rotatably connected inside the rotating groove 10, a liquid guide tube 23 is fixedly connected to the inner side of the rotating buckle 20, a motor fixing frame 19 is fixedly connected to the four corners of the top of the inner wall of the liquid guide tube 23, a hydraulic motor 17 is fixedly connected to the middle part between the motor fixing frames 19, and a rotating shaft 18 is rotatably connected to the middle part of the bottom end of the hydraulic motor 17. The worker tightens the guide shoe cap 2 on the float shoe body 1, places the float shoe body 1 on the drilling well mouth, starts the hydraulic motor 17 on the liquid guide tube 23, so that the rotating shaft 18 on the hydraulic motor 17 drives the float shoe body 1 on the float shoe fixing frame 16 to rotate in the drilling well, and puts the steel pipe into the outer side of the liquid guide tube 23, and then after the guide shoe cap 2 is drilled into the well.
[0032] Reference Figure 1-Figure 2 and Figure 4 The bottom end of the inner wall of the float shoe tube body 1 is threadedly connected with a threaded seat 14, the bottom end of the threaded seat 14 is fixedly connected with a guide shoe cap 2, and broken drill beads 12 are fixedly installed on the outside of the guide shoe cap 2 at equal intervals. The bottom of the outer side of the float shoe tube body 1 is fixedly connected with a guide block 22, and the top of the inner wall of the float shoe tube body 1 is fixedly connected with a float shoe fixing frame 16. The cement slurry is squeezed to the well wall through the guide block 22 for fixation. At the same time, the guide shoe cap 2 is driven by the hydraulic motor 17, and the broken drill beads 12 on the rotating guide shoe cap 2 break the hard gravel in the drilling well, and at the same time, the protrusions of the well wall are trimmed to prevent the guide pipe from being stuck on the well wall.
[0033] Reference Figure 1-Figure 4 A thread groove 15 is provided on the bottom side of the inner wall of the float shoe body 1, a thread groove 15 is provided on the outer side of the thread seat 14, an injection port 13 is provided on the middle and lower parts of the left and right sides of the guide shoe cap 2, a valve body 3 is fixedly connected to the middle and lower part of the inner wall of the float shoe body 1, a pin shaft 5 is slidably connected to the middle part of the top of the valve body 3, a plug 7 is fixedly connected to the middle part of the top of the pin shaft 5, and a shaft seat 6 is fixedly connected to the middle part of the bottom of the pin shaft 5. Flow holes 9 are provided at the four corners of the top of the valve body 3, a return spring 8 is sleeved in the middle and upper part of the outer side of the pin shaft 5, a valve cover 4 is fixedly connected to the middle and upper part of the inner wall of the float shoe body 1, and a through port 11 is provided in the middle part of the top of the valve cover 4. The worker transports cement slurry into the float shoe body 1 through the liquid guide tube 23, and under the action of pressure, the cement slurry squeezes the plug 7 through the through port 11 on the valve cover 4, so that the cement slurry passes through the flow hole 9 on the valve body 3, and the cement slurry passes through the injection port 13, and the cement slurry is injected into the drilling well.
[0034] Working principle: the worker tightens the guide shoe cap 2 on the float shoe body 1, places the float shoe body 1 on the wellbore, starts the hydraulic motor 17 on the liquid guide tube 23, so that the rotating shaft 18 on the hydraulic motor 17 drives the float shoe body 1 on the float shoe fixing frame 16 to rotate in the wellbore, and inserts the steel pipe into the outside of the liquid guide tube 23. Then, after the guide shoe cap 2 is drilled into the well, the worker transports cement slurry into the float shoe body 1 through the liquid guide tube 23, and under the action of pressure, the cement slurry squeezes the plug 7 through the opening 11 on the valve cover 4, so that the cement slurry passes through the flow hole 9 on the valve body 3, and the cement slurry is injected into the wellbore through the injection port 13, and the cement slurry is squeezed to the wellbore wall by the guide block 22 for fixing. At the same time, the guide shoe cap 2 is driven by the hydraulic motor 17, and the broken drill beads 12 on the rotating guide shoe cap 2 crush the hard gravel in the wellbore, and at the same time, the protrusions of the wellbore wall are trimmed to prevent the guide pipe from being stuck on the wellbore wall.
[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A telescopic rotating float shoe, comprising a float shoe tube body (1), characterized in that: A rotating disk (21) is fixedly connected to the middle upper part of the outer side of the float shoe tube body (1), a rotating groove (10) is provided inside the rotating disk (21), a rotating buckle (20) is rotatably connected inside the rotating groove (10), a liquid guide tube (23) is fixedly connected inside the rotating buckle (20), a motor fixing frame (19) is fixedly connected to the four corners of the top of the inner wall of the liquid guide tube (23), and a hydraulic motor (17) is fixedly connected to the middle part between the motor fixing frames (19). ), the middle part of the bottom end of the hydraulic motor (17) is rotatably connected to a rotating shaft (18), the bottom end of the inner wall of the float shoe tube body (1) is threadedly connected to a threaded seat (14), the bottom end of the threaded seat (14) is fixedly connected to a guide shoe cap (2), and crushing drill beads (12) are fixedly installed on the outside of the guide shoe cap (2) at equal intervals, the bottom of the outer side of the float shoe tube body (1) is fixedly connected to a guide block (22), and the top of the inner wall of the float shoe tube body (1) is fixedly connected to a float shoe fixing frame (16).
2. A telescopic rotating floating shoe according to claim 1, characterized in that: The bottom side of the inner wall of the float shoe tube body (1) is provided with a thread groove (15), and the outer side of the thread seat (14) is provided with a thread groove (15).
3. The telescopic rotary floating shoe according to claim 1, characterized in that: The shoe guide cap (2) is provided with an injection port (13) at the middle and lower parts of the left and right sides.
4. The telescopic rotary floating shoe according to claim 1, characterized in that: A valve body (3) is fixedly connected to the middle and lower portion of the inner wall of the float shoe tube body (1), and a pin shaft (5) is slidably connected to the middle portion of the top end of the valve body (3).
5. The telescopic rotary floating shoe according to claim 4, characterized in that: A plug (7) is fixedly connected to the middle of the top end of the pin shaft (5), and a shaft seat (6) is fixedly connected to the middle of the bottom end of the pin shaft (5).
6. The telescopic rotary floating shoe according to claim 4, characterized in that: The four corners of the top end of the valve body (3) are each provided with a flow hole (9).
7. The telescopic rotary floating shoe according to claim 4, characterized in that: A return spring (8) is sleeved in the middle and upper part of the outer side of the pin shaft (5).
8. The telescopic rotating float shoe according to claim 1, characterized in that: A valve cover (4) is fixedly connected to the middle upper portion of the inner wall of the float shoe tube body (1), and a through opening (11) is provided in the middle portion of the top of the valve cover (4).