Multifunctional guiding shoe

Abstract

The utility model relates to the technical field of guiding shoes, and discloses a multifunctional guiding shoe which comprises a guiding shoe shell which is a device main body and is used for protecting and supporting internal components, a rotary guiding head which is arranged at one end of the guiding shoe shell and is used for guiding the main body to pass through, and a control component which is arranged at the other end of the guiding shoe shell and is used for controlling the device main body to pass through. The control assembly is arranged in the guiding shoe shell and used for controlling internal pressure, the control assembly comprises a pressure limiting valve controller and a pressure spring, the pressure limiting valve controller is arranged in the guiding shoe shell, and a drainage hole is formed in the guiding shoe shell. When the guide shoe is used, the guide shoe is connected into the end of the sleeve for circulation, high-pressure blockage occurs, the pressure relief valve is quickly pushed to move downwards under the action of strong pressure difference until the pressure is leaked out of the pressure relief hole, and overhigh pressure is released in time, so that the problem that a traditional guide shoe cannot effectively deal with high-pressure blockage is solved, and the service life of the guide shoe is prolonged. And the safety and the stability of drilling operation are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of leading shoes, especially to a multifunctional leading shoe. BACKGROUND

[0002] In the field of energy exploitation such as oil and natural gas, drilling operation is a very key link, with exploration and development advancing to deeper and more complex strata, the performance requirements of drilling equipment and tools are increasingly stringent, the leading shoe as an important component in the casing running process of drilling operation, its performance directly affects the efficiency and safety of the whole drilling engineering, a multifunctional leading shoe emerges as the times require, it is designed to cope with the complex and changeable downhole environment, to ensure that the casing can be smoothly run in, and play an important role in subsequent circulation operation and other processes, which is of great significance to improve the overall level of drilling operation.

[0003] In the past drilling operation, the structure of the traditional leading shoe is relatively simple, usually only a metal structure with a streamlined shape, the main function is only to guide the casing into the wellbore, reduce the friction between the casing and the well wall, its technical principle is based on basic mechanical guiding, through the special shape of the leading shoe head, such as conical or similar horn mouth design, the casing can be run in along a relatively smooth path under the action of gravity and lowering power, in the circulation operation, the traditional leading shoe lacks effective fluid control mechanism, only allows fluid to pass through the gap between the leading shoe and the casing, and has limited control ability of fluid flow and pressure.

[0004] However, in the actual drilling process, the well conditions are complex and difficult to measure, and high pressure plugging phenomenon occurs from time to time, when high pressure plugging occurs, the traditional leading shoe lacks effective pressure release and regulation device, and cannot respond to this sudden situation in time, the excessive pressure cannot be released in time, which not only leads to circulation system failure, makes the drilling fluid unable to circulate normally, and further affects the key operation links such as cuttings carrying and drill bit cooling, but also causes pipe rupture, equipment damage and other serious accidents, greatly threatens the safety and stability of drilling operation, and becomes a big problem restricting the improvement of drilling efficiency and operation safety, therefore, a multifunctional leading shoe is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] In order to make up for the above shortcomings, the utility model provides a multifunctional leading shoe, which aims at improving the problem that the prior art cannot effectively respond to high pressure plugging.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model relates to a multifunctional leading shoe, including leading shoe shell, the leading shoe shell is device main body for providing protection and support to internal component, rotating guide head, rotating guide head sets up one end at leading shoe shell for guiding main body passes through, control component, control component sets up inside leading shoe shell for controlling internal pressure, control component includes pressure limiting valve controller and compression spring, pressure limiting valve controller sets up inside leading shoe shell, and the inside of leading shoe shell is opened with the flow hole, and compression spring sets up inside leading shoe shell, guide component, guide component sets up inside leading shoe shell for one -way guiding fluid.

[0008] As the further description of the above technical scheme:

[0009] The guide component includes the valve seat, and the valve seat is arranged inside the leading shoe shell.

[0010] As the further description of the above technical scheme:

[0011] The valve seat is on the side of the compression spring, and the valve seat is used for fixing and ensuring sealing.

[0012] As the further description of the above technical scheme:

[0013] The inside of the leading shoe shell is opened with the circulation hole, and the circulation hole is used for realizing the circulation of drilling fluid.

[0014] As the further description of the above technical scheme:

[0015] The outer wall of the valve seat is provided with the one-way valve, and the one-way valve is used for preventing fluid reverse flow and ensuring the normal direction of drilling fluid circulation.

[0016] As the further description of the above technical scheme:

[0017] The valve seat is arranged on the side of the one-way valve, and the one-way valve is fixed and kept stable.

[0018] As the further description of the above technical scheme:

[0019] The one-way valve is arranged at the bottom of the circulation hole, and the one-way valve is arranged inside the rotating guide head.

[0020] The utility model has the following beneficial effects:

[0021] The utility model discloses a multifunctional leading shoe, which comprises a leading shoe shell, a pressure relief valve, a rotating guide head and a pressure relief valve controller. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A three-dimensional schematic view of the multifunctional leading shoe is provided for the utility model;

[0023] Figure 2 A structure schematic view of the leading shoe shell of the multifunctional leading shoe is provided for the utility model;

[0024] Figure 3 A structure schematic view of the rotating guide head of the multifunctional leading shoe is provided for the utility model.

[0025] LEGEND:

[0026] 1, leading shoe shell; 2, pressure relief valve controller; 3, flow relief hole; 4, compression spring; 5, valve seat; 6, circulation hole; 7, rotating guide head; 8, one-way valve. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the utility model.

[0028] REFERENCE Figure 1 - Figure 3The utility model provides a kind of embodiment: a multifunctional shoe, comprising: shoe shell 1, selected with superhigh strength and excellent wear resistance special alloy steel material quality is carefully made into.The alloy steel is made by special smelting process and heat treatment procedure, with excellent pressure resistance, corrosion resistance and impact resistance, can be stable in operation in the harsh environment of downhole high temperature, high pressure and full of complex friction, shoe shell 1 is device main body, for providing protection and support for internal components, rotating guide head 7, the main part of rotating guide head 7 is made of superhard alloy, a variety of rare metal elements are incorporated in this alloy, after special smelting and forging process, with very high hardness, can resist any form of wear, rotating guide head 7 is arranged at one end of shoe shell 1, for guiding main body to pass, control component, control component is arranged in shoe shell 1, for controlling internal pressure, control component includes pressure limiting valve controller 2 and compression spring 4, pressure limiting valve controller 2 is arranged in shoe shell 1, and drainage hole 3 is opened in shoe shell 1, drainage hole 3 ensures that when needing to be pressure relief operation, high-pressure fluid can be discharged at the fastest speed, maximum flow, so as to rapidly reduce internal pressure, compression spring 4 is arranged in shoe shell 1, and the elastic force generated by compression spring 4 can make pressure limiting valve keep closed state, ensure that fluid flows normally.And once pressure exceeds preset safety value, the strong force generated by pressure will overcome the elastic force of compression spring 4, so that compression spring 4 is compressed, and then pushes the valve core of pressure limiting valve to open, high-pressure fluid is smoothly discharged through drainage hole 3, realizes effective control to internal pressure, guide component, guide component is arranged in shoe shell 1, for unidirectional guiding fluid, guide component includes valve seat 5, valve seat 5 is arranged in shoe shell 1, and valve seat 5 is on the side of compression spring 4, and valve seat 5 is used for fixing and ensuring sealing, circulation hole 6 is opened in shoe shell 1, and circulation hole 6 is used for realizing drilling fluid circulation, one-way valve 8 is arranged on the outer wall of valve seat 5, and one-way valve 8 is made of a special rubber material and metal framework composite structure.Rubber material has good flexibility and elasticity, can be tightly attached to valve seat 5 under different pressure conditions, realizes perfect sealing effect, one-way valve 8 is used for preventing fluid backflow, ensures the normal direction of drilling fluid circulation, valve seat 5 is arranged on the side of one-way valve 8, and one-way valve 8 is fixed and kept stable, one-way valve 8 is arranged at the bottom of circulation hole 6, and one-way valve 8 is arranged in rotating guide head 7.

[0029] Specifically, before the oil drilling operation is started, the technician needs to carefully connect the shoe shell 1 to the front end of the sleeve, and use professional tools to ensure that the two are tightly connected to prevent loosening and leakage. When the casing with the shoe successfully reaches the predetermined depth, the operator starts the circulation system. At this moment, high-pressure fluid rapidly flows into the shoe shell 1, and the special alloy steel material used ensures stability and safety under high pressure. After passing through the one-way valve 8, the fluid is guided by the circulation hole 6, which circulates outside the pipe. During the entire circulation process, the staff continuously and closely monitors key parameters such as pressure and flow rate using advanced monitoring instruments, ensuring that the circulation system operates stably at all times. If abnormal pressure occurs inside the shoe, the pressure limiting valve controller 2 will immediately start, and its internal high-precision sensor will quickly sense the pressure change and immediately send a signal. The compression spring 4 is compressed under pressure, pushing the valve core of the pressure limiting valve downward, and the drain hole 3 is instantly opened, and the high-pressure drilling fluid is quickly discharged. When the pressure drops to a stable value, the compression spring 4 rebounds and precisely closes the drain hole 3, and the circulation system resumes stable operation, ensuring smooth progress of the drilling operation.

[0030] Working principle: when in use, the shoe shell 1 is connected to the front end of the sleeve, and when it reaches a certain depth, the circulation system is started, at this time the fluid passes through the inside of the shoe shell 1, and is guided by the one-way valve 8 and the circulation hole 6 to achieve normal circulation outside the pipe. During the circulation process, parameters such as pressure and flow rate are continuously monitored to ensure that the circulation system operates stably. When abnormal pressure occurs inside, the pressure limiting valve controller 2 is started, the internal sensor senses and sends a signal, the compression spring 4 is compressed under pressure, the valve core of the pressure limiting valve is pushed downward, the drain hole 3 is opened, the high-pressure drilling fluid is discharged, and the stable value is reached. When the stable value is reached, the compression spring 4 rebounds to close the drain hole 3, and the stable circulation continues.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-functional bootie, characterized by, Include: The leading shoe shell (1) is the device body, which provides protection and support for the internal components; The rotating guide head (7) is provided at one end of the leading shoe shell (1) for guiding the main body through; The control assembly is provided inside the leading shoe shell (1) for controlling the internal pressure; The control assembly includes a pressure limiting valve controller (2) and a compression spring (4), the pressure limiting valve controller (2) is provided inside the leading shoe shell (1), the leading shoe shell (1) is provided with a flow hole (3) inside, the compression spring (4) is provided inside the leading shoe shell (1); The guide assembly is provided inside the leading shoe shell (1) for one-way guiding of fluid.

2. A multi-functional boot according to claim 1, characterized in that: The guide assembly includes a valve seat (5) provided inside the leading shoe shell (1).

3. A multi-functional boot according to claim 2, characterized in that: The valve seat (5) is on one side of the compression spring (4), and the valve seat (5) is used for fixing and ensuring sealing.

4. A multi-functional boot according to claim 3, characterized in that: The leading shoe shell (1) is provided with a circulating hole (6) inside, which is used for realizing the circulation of drilling fluid.

5. A multi-functional boot according to claim 4, characterized in that: The outer wall of the valve seat (5) is provided with a one-way valve (8), which is used for preventing fluid backflow and ensuring the normal direction of drilling fluid circulation.

6. A multi-functional boot according to claim 5, characterized in that: The valve seat (5) is provided on one side of the one-way valve (8) to fix and keep the one-way valve (8) stable.

7. A multi-functional boot according to claim 6, characterized in that: The one-way valve (8) is provided at the bottom of the circulating hole (6), and the one-way valve (8) is provided inside the rotating guide head (7).

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