Deviation correcting system used in polar region hot water drilling process

Abstract

The invention discloses a deviation correcting system used in the polar region hot water drilling process, and belongs to the field of drilling tools of polar region drilling engineering, the deviation correcting system comprises a center pipe, a rotating disc, a water baffle, a first straight gear, a nozzle, a drill rod, a second straight gear, a deep groove ball bearing, a rotating motor and a push rod motor, and the water baffle synchronously acts along with a push rod of the push rod motor. The water baffle is obliquely arranged downwards relative to the vertical direction, so that when the water baffle is in the working state, the water baffle crosses the vertical center line of hot water spraying of the nozzle, in the drilling process through cooperation of all the components, after an attitude sensor in the drilling instrument cabin detects that the drilling state of the hot water drill deviates from a preset track, a rotating motor drives a rotating disc to rotate, and the water baffle is driven by a motor to rotate. After rotating to a specified direction, the push rod motor pushes out the water baffle, the water baffle blocks a part of hot water, the hot water inclines towards one side of the water baffle through a wall attachment effect, and the hot water flows down on the water baffle under the influence of gravity to melt an ice wall on the side of the water baffle, so that deviation correction of the drilling tool is completed, and smooth drilling is ensured.

Description

Technical Field

[0001] The invention belongs to the field of drilling equipment for polar drilling projects, and in particular, relates to a deflection correction system used in polar hot water drilling. Background Art

[0002] At present, the fastest and most efficient drilling method in glacier drilling is to drill quickly on the Antarctic ice shelf with a hot water drill, using high-temperature hot water to achieve high-pressure spraying through a nozzle to melt the ice layer for drilling. Drilling large-diameter holes with hot water is of great significance for monitoring the material balance of ice shelves and studying the evolution of ice sheets and ice shelves. This method has been successfully applied to the hot water drilling system in Antarctica, and the drilling speed can reach 40m / h. The ice layer structure of the polar ice sheet is complex. Due to factors such as uneven ice layer thickness, low temperature, and cracks inside the ice layer, the stability and verticality of the borehole will be affected. During the process of rapid hot water drilling at great depths, the hot water drill will deviate, causing the borehole to tilt. Therefore, controlling the borehole tilt is a key issue in hot water drilling. At present, commonly used well inclination control technologies include using steering tools, adjusting drilling parameters, and using appropriate drill bit combinations. However, these technologies may face special challenges in polar ice cap environments, such as: the inability of steering tools to adapt to long-term extremely low temperature environments, the limited effect of parameter adjustment under ice caps, and the combination of pure drill tools complicates drilling and is prone to component detachment, which requires further improvement and optimization of the drill tool structure. In order to achieve high-speed and efficient drilling sampling, it is necessary to design a new drill tool that combines hot water drilling technology with deflection correction technology to ensure verticality of the borehole while achieving rapid drilling. Summary of the invention

[0003] Based on the aforementioned defects of the prior art, the purpose of the present invention is to provide a deflection correction system for use in polar hot water drilling. The deflection correction system can be combined with a hot water drilling system to correct the inclined section of the borehole during hot water drilling, thereby achieving the purpose of rapid drilling.

[0004] To achieve the above-mentioned purpose, the present invention provides a deflection correction system for polar hot water drilling, comprising a center tube, a rotating disk, a water retaining plate, 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 drill pipe sleeve is arranged on the outside of the center tube, and a space for accommodating a push rod of the push rod motor is arranged inside the drill pipe; the second spur gear is fixed to the lower part of the drill pipe; the rotating disk is located at the lower part of the second spur 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 spur gear, and the balls inside the deep groove ball bearing drive the rotating disk Rotate; the center tube passes through the rotating disk and is coaxially connected to the nozzle, and the center tube is connected to the inside of the nozzle; the first spur gear and the second spur 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 spur gear; the push rod motor is connected to the ground control center; the water baffle plate passes through the rotating disk and is fixed to the push rod of the push rod motor, and the water baffle plate moves synchronously with the push rod of the push rod motor. The water baffle plate is an arc-shaped plate, and the cross-section of the water baffle plate is an arc-shaped plate. The water baffle plate is tilted downward relative to the vertical direction, so that when the water baffle plate is in working state, it crosses the vertical center line of the hot water sprayed from the nozzle.

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

[0006] Furthermore, when the water baffle 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 is located.

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

[0008] Through the above-mentioned design scheme, the present invention can bring the following beneficial effects: the deflection correction system proposed by the present invention is used for rapid hot water drilling at great depth in polar regions. 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 spur gear to rotate, and the first spur gear drives the second spur gear meshing with it to rotate, and then the second spur gear drives the rotating disk and the drill rod to start rotating. After rotating to the specified direction, the push rod motor pushes out the water baffle, and the water baffle blocks a part of the hot water. The hot water flows to one side of the water baffle through the wall attachment effect, and flows down on the water baffle under the influence of gravity to melt the ice wall on the side of the water baffle, which can effectively correct the deviation and enable the drilling tool to drill efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0010] Figure 2 This is a schematic diagram of the overall structure of the skew correction system proposed by the present invention;

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

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

[0013] Figure 5 A partial diagram of the skew correction system proposed by the present invention;

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

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

[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 should be understood by people with ordinary skills in the field to which the present invention belongs. In order to avoid confusing the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail. It should be understood that the terms "first" and "second" are used for descriptive purposes only, and the characteristics of "first" and "second" do not indicate 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", "install", "connect", "connect" and the like should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral connection; 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 connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

[0019] like Figures 1 to 6As shown, in this embodiment, a deflection correction system for polar hot water drilling is provided. When the borehole deviates, the deflection correction system is replaced on the hot water drill. The central tube 1 and the original drilling tool are an integral whole. It is only necessary to install the accessories of the deflection correction system around the central tube 1 one by one. The drill rod 6 of the deflection correction system is rotatably connected with the drill rod of the original drilling tool through a bearing to ensure that the rotating motor 9 drives the drill rod 6 of the deflection correction system to rotate, and the drill rod of the original drilling tool does not rotate with it. The deflection correction system includes a central tube 1, a rotating disk 2, a water baffle 3, a first straight gear 4, a nozzle 5, and a drill The rod 6, the second spur gear 7, the deep groove ball bearing 8, the rotary motor 9 and the push rod motor 10, the central tube 1, the rotating disk 2, the first spur gear 4, the nozzle 5, the drill rod 6, the second spur gear 7, the deep groove ball bearing 8, the rotary motor 9 and the push rod motor 10 are all universal standard parts or parts known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or through conventional experimental methods. The rotary disk 2 is provided with a rotary motor mounting hole 12, a water retaining plate mounting hole 13 and a push rod motor mounting hole 14. The drill rod 6 is sleeved on the outside of the central tube 1, and the drill rod 6 mainly plays the role of counterweight to ensure the stability of the drilling tool. The drill rod 6 is provided with a space for accommodating the push rod 11 of the push rod motor 10; 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 the upper part of the rotating disk 2 is provided with a groove; 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 , and the lowermost end of the central tube 1 is coaxially connected with a nozzle 5 communicating with the interior thereof. The rotary motor 9 is installed on the rotary disk 2 through the rotary motor mounting hole 12, and the rotary motor 9 is connected to the ground control center. The rotary motor 9 receives the working state adjustment signal transmitted to it by the ground control center, and the rotary motor 9 responds to the working state adjustment signal and performs a rotating action. The output shaft of the rotary motor 9 is coaxially connected with the first spur gear 4; the first spur gear 4 is meshed with the second spur gear 7; the push rod motor 10 is installed on the rotary disk 2 through the push rod motor mounting hole 14, and the push rod motor 10 is connected to the ground control center; the water baffle 3 passes through the rotary disk 2 through the water baffle mounting hole 13 and is fixed with the push rod 11 of the push rod motor 10; the water baffle 3 is an arc plate, and 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 an arc, and the water baffle 3 is tilted downward relative to the vertical direction, and the tilt angle is 3° to 5°, so that when the water baffle 3 is in the working state, it crosses the vertical center line of the hot water sprayed by the nozzle 5, and the sprayed hot water is adsorbed around the water baffle 3 according to the wall attachment effect and flows down.

[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 motor 9 to operate, and the rotation motor 9 drives the first spur gear 4 to rotate, and the first spur gear 4 drives the second spur gear 7 meshing with it to rotate, and then the second spur gear 7 drives the rotating disk 2 and the drill rod 6 to start rotating, and drives the water baffle 3 to move to the required azimuth angle. The nozzle 5 is connected to the center pipe 1 and is located at the bottom of the entire drilling tool. To prevent the drilling from being affected, when the water baffle 3 is in a non-working state, the plane where the bottom 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 drilling tool. This is an existing structure of the existing drilling tool. The existing drilling instrument cabin and attitude sensor of the drilling tool will not be described in detail here.

[0021] The first spur gear 4 adopts 1 module 19 teeth, and the second spur gear 7 adopts 1 module 82 teeth. In order 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 balls inside the deep groove ball bearings 8 drive the rotating disk 2 to rotate. The rotating motor 9 drives the first spur gear 4 to rotate, and the first spur gear 4 drives the second spur gear 7 meshing with it to rotate, and then the second spur gear 7 drives the rotating disk 2 and the drill rod 6 to start rotating. After rotating to the specified direction, the push rod motor 10 pushes out the water baffle 3, and the hot water sprayed from the nozzle 5 is fan-shaped. The water baffle 3 extends and crosses the vertical center line of the hot water spray. The sprayed hot water is adsorbed around the water baffle 3 and flows down according to the wall effect (the molecules of the liquid have a strong adsorption attraction due to surface tension), quickly melting the ice wall on the side of the water baffle 3, so that the drilling tool is successfully corrected. The necessary components in the present invention have a sealing function to ensure that the entire drilling tool can continue to work in water.

[0022] To sum up, the present invention proposes a deflection correction system for polar 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 9 drives the first spur gear 4 to rotate, and the first spur gear 4 drives the second spur gear 7 meshing with it to rotate, and then the second spur gear 7 drives the rotating disk 2 and the drill rod 6 to start rotating. After rotating to the specified direction, the push rod motor 10 pushes out the water baffle 3, and the water baffle 3 blocks a part of the hot water. The hot water flows to one side of the water baffle 3 through the wall attachment effect, and flows down on the water baffle 3 under the influence of gravity to melt the ice wall on the side of the water baffle 3, thereby completing the drill bit deflection correction and ensuring smooth 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.

Images