A deviation correction system for polar hot water drilling

Abstract

The present invention discloses a deviation rectification system for hot water drilling in polar regions, belonging to the field of drilling tools for polar drilling engineering. It includes a central pipe, a rotating disk, a water baffle, a first spur gear, a nozzle, a drill pipe, a second spur gear, a deep groove ball bearing, a rotating motor and a push rod motor. The water baffle moves synchronously with the push rod of the push rod motor. The water baffle is inclined downward relative to the vertical direction, so that when the water baffle is in the working state, it crosses the vertical center line of the hot water spray of the nozzle. During the drilling process, when the attitude sensor in the drilling instrument cabin detects that the drilling state of the hot water drill deviates from the predetermined track, the rotating motor drives the rotating disk to rotate. After rotating to the specified direction, the push rod motor pushes out the water baffle. The water baffle blocks part of the hot water. Through the wall attachment effect, the hot water flows obliquely towards the side of the water baffle and melts the ice wall on the side of the water baffle under the influence of gravity on the water baffle, completing the deviation rectification of the drill tool and ensuring the smooth progress of drilling.

Description

Technical Field

[0001] The present invention belongs to the field of drilling tools for polar drilling engineering, and specifically relates to a deviation rectification system for polar hot water drilling. Background Art

[0002] Currently, the fastest and most efficient drilling method in glacier drilling is to quickly drill through a hot water drill on the Antarctic ice shelf. High-pressure jetting is achieved by using high-temperature hot water through a nozzle to melt the ice layer for drilling. Drilling a large-diameter hole through hot water is of great significance for monitoring the mass balance of the ice shelf and studying the evolution process of the ice sheet and ice shelf. This method has been successfully applied to the hot water drill system in Antarctica, and the drilling speed can reach 40 m / h. The ice layer structure of the polar ice sheet is complex. Factors such as uneven ice layer thickness, low temperature, and cracks existing inside the ice layer will affect the stability and verticality of the borehole. During the process of rapid hot water drilling at great depths, the hot water drill will deviate, resulting in borehole inclination. Therefore, controlling borehole inclination is a key issue in hot water drilling. Currently, common well deviation control techniques include using guiding tools, adjusting drilling parameters, adopting a suitable drill string combination, etc. However, these techniques may face special challenges in the polar ice sheet environment. For example, guiding tools cannot adapt to the extremely low temperature environment for a long time, the effect of parameter adjustment is limited under the ice sheet, and the combination of pure drill strings complicates the drilling and prone to phenomena such as component detachment, thus requiring further improvement and optimization of the drill string structure. To achieve high-speed and efficient drilling and sampling, therefore, a brand-new drill string needs to be designed to combine the hot water drilling technology with the deviation rectification technology to ensure the borehole is vertical while drilling quickly. Summary of the Invention

[0003] Based on the foregoing defects of the prior art, the purpose of the present invention is to provide a deviation rectification system for polar hot water drilling. This deviation rectification system can be combined with the hot water drill system to rectify the inclined section of the borehole during the hot water drilling process, thereby achieving the purpose of rapid drilling.

[0004] To achieve the above object, the present invention provides a deviation rectification system for polar hot water drilling, which includes a central pipe, a rotating disk, a water baffle, a first straight gear, a nozzle, a drill pipe, a second straight gear, a deep groove ball bearing, a rotating motor and a push rod motor. The drill pipe is sleeved outside the central pipe, and a space for accommodating the push rod of the push rod motor is arranged inside the drill pipe; the second straight gear is fixed at the lower part of the drill pipe; the rotating disk is located below the second straight gear, and a groove is arranged on the upper part of the rotating disk; the deep groove ball bearing is embedded in the groove, the outer ring of the deep groove ball bearing is fixed to the second straight gear, and the inner balls of the deep groove ball bearing drive the rotating disk to rotate; the central pipe passes through the rotating disk and is coaxially connected to the nozzle, and the central pipe is internally communicated with the nozzle; the first straight gear and the second straight gear are meshed and connected; the rotating motor is connected to the ground control center, and the output shaft of the rotating motor is coaxially connected to the first straight gear; the push rod motor is connected to the ground control center; the water baffle passes through the rotating disk and is fixed to the push rod of the push rod motor, and the water baffle moves synchronously with the push rod of the push rod motor. The water baffle is an arc-shaped plate, the cross section of the water baffle is arc-shaped, and the water baffle is inclined downward relative to the vertical direction, so that when the water baffle is in the working state, it crosses the vertical center line of the hot water spray of the nozzle.

[0005] As a preferred solution of the present invention, the inclination angle of the water baffle is 3°-5°.

[0006] Furthermore, when the water baffle is in the non-working state, the plane where the lowest end of the water baffle is located is not lower than the plane where the bottom end of the nozzle is located.

[0007] As a preferred solution of the present invention, the first straight gear has 1 module and 19 teeth, and the second straight gear has 1 module and 82 teeth.

[0008] Through the above design, the present invention can bring the following beneficial effects: The deviation rectification system proposed by the present invention is used for polar large-depth rapid hot water drilling. During the drilling process, when the attitude sensor in the drilling instrument cabin detects that the drilling state of the hot water drill deviates from the predetermined track, the rotating motor drives the first straight gear to rotate, the first straight gear drives the second straight gear meshed with it to rotate, and then the second straight gear drives the rotating disk and the drill pipe to start rotating. After rotating to the specified direction, the push rod motor pushes out the water baffle, and the water baffle blocks part of the hot water. Through the wall attachment effect, the hot water flows obliquely towards the side of the water baffle, flows down on the water baffle and melts the ice wall on the side of the water baffle under the influence of gravity, which can effectively correct the deviation and enable the drill to drill efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic cross-sectional view of the structure of the deviation rectification system proposed by the present invention;

[0010] Figure 2 It is a schematic overall structure diagram of the deviation rectification system proposed by the present invention;

[0011] Figure 3 It is a schematic diagram of the structure of the rotary disk;

[0012] Figure 4 It is a schematic diagram of the structure of the water baffle;

[0013] Figure 5 It is a partial view of the deviation rectification system proposed by the present invention;

[0014] Figure 6 It is a sectional view of the structure of the push rod motor.

[0015] The marks in the figure are as follows: 1 - central pipe, 2 - rotary disk, 3 - water baffle, 4 - first spur gear, 5 - nozzle, 6 - drill pipe, 7 - second spur gear, 8 - deep groove ball bearing, 9 - rotary motor, 10 - push rod motor, 11 - push rod, 12 - rotary motor mounting hole, 13 - water baffle mounting hole, 14 - push rod motor mounting hole. Specific embodiments

[0016] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meaning understood by those of ordinary skill in the art to which the present invention belongs. In order to avoid obscuring the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail. It should be understood that the terms "first" and "second" are only used for descriptive purposes, and the features defined with "first" and "second" do not represent any order, quantity, or importance, but are only used to distinguish different components.

[0017] In the present invention, unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" and the like should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or integrated; the connection can be a mechanical connection or an electrical connection; the connection can be a direct connection or an indirect connection through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] The large depth mentioned in the present invention means that the drilling depth exceeds 1500 meters.

[0019] Such as Figures 1 to 6As shown in the figure, in this embodiment, a deviation rectification system for polar hot water drilling is provided. After the drill hole deviates, the deviation rectification system is replaced on the hot water drill. The central pipe 1 and the original drill tool are an integral whole. Only the accessories of the deviation rectification system need to be installed around the central pipe 1 one by one. The drill pipe 6 of the deviation rectification system is rotationally connected to the drill pipe of the original drill tool through a bearing, ensuring that the rotation motor 9 drives the drill pipe 6 of the deviation rectification system to rotate, and the drill pipe of the original drill tool does not rotate accordingly. The deviation rectification system includes a central pipe 1, a rotating disk 2, a water baffle 3, a first spur gear 4, a nozzle 5, a drill pipe 6, a second spur gear 7, a deep groove ball bearing 8, a rotation motor 9, and a push rod motor 10. The central pipe 1, the rotating disk 2, the first spur gear 4, the nozzle 5, the drill pipe 6, the second spur gear 7, the deep groove ball bearing 8, the rotation motor 9, and the push rod motor 10 are all common standard parts or components known to those skilled in the art. Their structures and principles are known to those skilled in the art through technical manuals or obtained through conventional experimental methods. The rotating disk 2 is provided with a rotation motor mounting hole 12, a water baffle mounting hole 13, and a push rod motor mounting hole 14. The drill pipe 6 is sleeved outside the central pipe 1. The drill pipe 6 mainly bears the weight function to ensure the stability of the drill tool. A space for accommodating the push rod 11 of the push rod motor 10 is arranged inside the drill pipe 6. The second spur gear 7 is fixed at the lower part of the drill pipe 6. The rotating disk 2 is located below the second spur gear 7. A groove is provided on the upper part of the rotating disk 2. The deep groove ball bearing 8 is embedded in the groove. The outer ring of the deep groove ball bearing 8 is fixed to the second spur gear 7. The inner balls of the deep groove ball bearing 8 drive the rotating disk 2 to rotate. The central pipe 1 passes through the rotating disk 2. The nozzle 5 communicated with the inside thereof is coaxially connected to the lowermost end of the central pipe 1. The rotation motor 9 is installed on the rotating disk 2 through the rotation motor mounting hole 12. The rotation motor 9 is connected to the ground control center. The rotation motor 9 receives the working state adjustment signal transmitted by the ground control center to it. The rotation motor 9 responds to the working state adjustment signal and performs a rotation action. The output shaft of the rotation motor 9 is coaxially connected to the first spur gear 4. The first spur gear 4 and the second spur gear 7 are meshed and connected. The push rod motor 10 is installed on the rotating disk 2 through the push rod motor mounting hole 14. The push rod motor 10 is connected to the ground control center. The water baffle 3 passes through the rotating disk 2 through the water baffle mounting hole 13 and is fixed to the push rod 11 of the push rod motor 10. The water baffle 3 is an arc-shaped plate. The water baffle 3 moves synchronously with the push rod 11 of the push rod motor 10. The cross-section of the water baffle 3 is arc-shaped. The water baffle 3 is inclined downward relative to the vertical direction at an inclination angle of 3° to 5°. When the water baffle 3 is in the working state, it crosses the vertical center line of the hot water spray of the nozzle 5, and the sprayed hot water adheres to the periphery of the water baffle 3 and flows down according to the wall attachment effect.

[0020] During the drilling process, when the attitude sensor in the drilling instrument cabin detects that the drilling state of the hot water drill deviates from the predetermined track, the attitude sensor transmits a signal to the ground control center. After receiving the signal transmitted by the attitude sensor, the ground control center controls the rotation of the rotary motor 9. The rotary motor 9 drives the first spur gear 4 to rotate, and the first spur gear 4 drives the second spur gear 7 engaged with it to rotate. Further, the second spur gear 7 drives the rotating disk 2 and the drill pipe 6 to start rotating, driving the water baffle 3 to move to the required azimuth angle. The nozzle 5 is connected to the central pipe 1 and is located at the lowest end of the entire drill string. To prevent the drilling from being affected, when the water baffle 3 is in a non-working state, the plane where the lowest end of the water baffle 3 is located is not lower than the plane where the bottom end of the nozzle 5 is located. The drilling instrument cabin is in other parts of the entire drill string. This is an existing structure of the existing drill string, and the existing drilling instrument cabin and attitude sensor of the drill string will not be elaborated here too much.

[0021] The first spur gear 4 has a module of 1 and 19 teeth, and the second spur gear 7 has a module of 1 and 82 teeth. To facilitate the smooth rotation of the rotating disk 2, two deep groove ball bearings 8 are used to support the rotating disk 2, and the internal balls of the deep groove ball bearings 8 drive the rotating disk 2 to rotate. The rotary motor 9 drives the first spur gear 4 to rotate, and the first spur gear 4 drives the second spur gear 7 engaged with it to rotate. Further, the second spur gear 7 drives the rotating disk 2 and the drill pipe 6 to start rotating. After rotating to the specified direction, the push rod motor 10 pushes out the water baffle 3. The hot water ejected from the nozzle 5 is in a fan shape. The water baffle 3 extends and crosses the vertical center line of the hot water spray. According to the wall attachment effect (the molecules of the liquid have a strong adsorption attraction due to surface tension), the ejected hot water adsorbs around the water baffle 3 and flows down, quickly melting the ice wall on the side of the water baffle 3, making the drill string deviation correction successful. In the present invention, the necessary components have a sealing function to ensure that the entire drill string can continuously work in water.

[0022] In summary, for the deviation correction system proposed in the present invention during the polar hot water drilling process, during the drilling process, when the attitude sensor in the drilling instrument cabin detects that the drilling state of the hot water drill deviates from the predetermined track, the rotary motor 9 drives the first spur gear 4 to rotate, the first spur gear 4 drives the second spur gear 7 engaged with it to rotate. Further, the second spur gear 7 drives the rotating disk 2 and the drill pipe 6 to start rotating. After rotating to the specified direction, the push rod motor 10 pushes out the water baffle 3. The water baffle 3 blocks a part of the hot water. Due to the wall attachment effect, the hot water flows obliquely to one side of the water baffle 3, flows on the water baffle 3 and melts the ice wall on the side of the water baffle 3 under the influence of gravity, completing the deviation correction of the drill string and ensuring the smooth progress of the drilling.

Claims

1. A deflection correction system for polar hot water drilling, characterized in that: include: A central tube (1), a rotating disk (2), a water retaining plate (3), a first spur gear (4), a nozzle (5), a drill rod (6), a second spur gear (7), a deep groove ball bearing (8), a rotating motor (9) and a push rod motor (10); the drill rod (6) is sleeved on the outside of the central tube (1), and a space for accommodating a push rod (11) of the push rod motor (10) is provided inside the drill rod (6); the second spur gear (7) is fixed to the lower part of the drill rod (6); the rotating disk (2) is located at the lower part of the second spur gear (7), and a groove is provided on the upper part of the rotating disk (2); the deep groove ball bearing (8) is embedded in the groove, the outer ring of the deep groove ball bearing (8) is fixed to the second spur gear (7), and the inner ball of the deep groove ball bearing (8) drives the rotating disk (2) to rotate; the central tube (1) passes through the rotating disk (2 ) is coaxially connected to the nozzle (5), and the central tube (1) is connected to the inside of the nozzle (5); the first spur gear (4) and the second spur gear (7) are meshed and connected; the rotating motor (9) is connected to the ground control center, and the output shaft of the rotating motor (9) is coaxially connected to the first spur gear (4); the push rod motor (10) is connected to the ground control center; the water baffle (3) passes through the rotating disk (2) and is fixed to the push rod (11) of the push rod motor (10), and the water baffle (3) moves synchronously with the push rod (11) of the push rod motor (10), the water baffle (3) is an arc-shaped plate, the cross section of the water baffle (3) is an arc-shaped plate, and the water baffle (3) is inclined downward relative to the vertical direction, so that when the water baffle (3) is in a working state, it passes over the vertical center line of the hot water sprayed by the nozzle (5).

2. The deflection correction system for polar hot water drilling according to claim 1, characterized in that: The inclination angle of the water retaining plate (3) is 3° to 5°.

3. The deflection correction system for polar hot water drilling according to claim 1 or 2, characterized in that: When the water baffle (3) is in a non-working state, the plane where its lowermost end is located is not lower than the plane where the bottom end of the nozzle (5) is located.

4. The deflection correction system for polar hot water drilling according to claim 1, characterized in that: The first spur gear (4) has a module of 19 teeth, and the second spur gear (7) has a module of 82 teeth.

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