A screw drill with function of preventing water hole of drill bit from being blocked

Abstract

The present invention discloses a screw drill with the function of preventing the clogging of a drill bit water hole, comprising a fixed sleeve column and a three-cone drill bit device, wherein a hydraulic motor device is arranged at an inner position on the right side of the fixed sleeve column, a universal shaft device is sleeved at an outer wall position on the left side of the hydraulic motor device, the drill bit water hole in the fixed three-cone drill bit is arranged as an internally threaded drill bit water hole, and an externally threaded slope soil-proof net device is sleeved at an inner position of the internally threaded drill bit water hole, so that when the screw drill is drilling, the externally threaded slope soil-proof net device can prevent mud from entering the internally threaded drill bit water hole, and the externally threaded slope soil-proof net device can synchronously discharge mud, so that the internally threaded drill bit water hole can be used continuously without the need for staff to perform cleaning work, and the entire device can also continue to work, which not only improves work efficiency but also reduces the workload of staff.

Description

Technical Field

[0001] The invention belongs to the technical field related to screw drill tools, and in particular relates to a screw drill tool capable of preventing water holes in a drill bit from being blocked. Background Art

[0002] The screw drill is mainly composed of four major assemblies, namely the bypass valve, hydraulic motor, universal joint and transmission shaft. The screw motor is the main component of the drill. Many practical and theoretical analysis results show that if the motor is to work normally and effectively, the pressure drop that each level of the motor can withstand should not exceed 0.8Mpa, otherwise the motor will leak; the speed will drop quickly, and in serious cases, it will stop rotating completely and the motor will be damaged; (one lead of the motor is one level) the mud flow used on site should be within the recommended range, otherwise it will affect the motor efficiency and even increase wear; the performance parameters of the screw motor are the main performance parameters of the screw drill; the theoretical output torque of the motor is proportional to the motor pressure drop, and the output speed is proportional to the input mud flow. As the load increases, the number of drill speeds decreases, so as long as the reading of the pressure gauge on the ground and the flow of the pump are controlled, the torque and speed of the downhole drill can be controlled.

[0003] The existing screw drilling tool technology has the following problems: when the existing screw drilling tool is in use, the drill water hole in the three-cone drill bit will often be blocked by mud. In order not to affect the use of the three-cone drill bit, the staff needs to clean the drill water hole in the three-cone drill bit within a period of time. When cleaning the drill water hole, the entire screw drilling tool needs to stop drilling, which not only reduces the work efficiency, but also increases the workload of the staff. Summary of the invention

[0004] The object of the present invention is to provide a screw drill having the function of preventing the water hole of the drill bit from being blocked, so as to solve the problems of reduced work efficiency and increased workload of the staff raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a screw drill with the function of preventing the water hole of a drill bit from being blocked, comprising a fixed sleeve and a three-cone drill bit device, a liquid motor device is arranged at the right inner position of the fixed sleeve, a universal shaft device is sleeved at the left outer wall position of the liquid motor device, the universal shaft device is located at the inner position of the fixed sleeve, a transmission shaft component device is sleeved at the left position of the universal shaft device, the transmission shaft component device is located at the inner position of the left side of the fixed sleeve, a bypass valve is sleeved at the left position of the transmission shaft component device, the bypass valve is located at the left position of the fixed sleeve, a three-cone drill bit device is sleeved at the left position of the bypass valve, the three-cone drill bit device comprises an externally threaded connecting column, a fixed three-cone drill bit device ... A roller drill bit, an externally threaded slope soil-proof net device and an internally threaded drill bit water hole, an externally threaded connecting column is arranged at the middle position of the lower end of the fixed three-roller drill bit, internally threaded drill bit water holes are arranged at the internal positions on the left and right sides in front of the fixed three-roller drill bit and at the middle internal position in the rear, the internal positions of the three internally threaded drill bit water holes are sleeved with externally threaded slope soil-proof net devices, the externally threaded slope soil-proof net device comprises a slope fixing column, an externally threaded connecting body and a fixed soil-proof net device, an externally threaded connecting body is arranged at the outer wall position below the slope fixing column, a fixed soil-proof net device is arranged at the middle internal position of the slope fixing column, and the externally threaded slope soil-proof net device is fixedly connected to the internally threaded drill bit water hole through the slope fixing column and the externally threaded connecting body.

[0006] Preferably, the shape and structure of the fixed sleeve column is set to a hollow cylindrical structure, the thickness of the fixed sleeve column is set to eight millimeters, and anti-rust coatings are provided on the inner and outer walls of the fixed sleeve column.

[0007] Preferably, the liquid motor device is composed of a stator and a rotor; the stator is formed by injecting a rubber bushing on the inner wall of a steel pipe, and its inner hole is a spiral with certain geometric parameters; the rotor is a screw with a hard layer; the rotor and the stator are meshed with each other, and a spiral sealing chamber is formed by the lead difference between the two to complete energy conversion, and the liquid motor device is connected to the universal shaft device through the rotor.

[0008] Preferably, the cardan shaft device is composed of a cardan shaft and a cardan shaft housing, and the cardan shaft housing is located at both ends of the cardan shaft. The cardan shaft device is connected to the liquid motor device at the top and the transmission shaft component device at the bottom.

[0009] Preferably, the transmission shaft component device is composed of a transmission shaft and a thrust bearing, and the thrust bearing is located at upper and lower sides of the transmission shaft, and the transmission shaft component device is respectively connected to the universal shaft device and the bypass valve through the thrust bearing.

[0010] Preferably, the bypass valve is composed of a valve body, a valve sleeve, a valve core and a spring. Under pressure, the valve core slides in the valve sleeve, and the movement of the valve core changes the flow direction of the liquid, so that the bypass valve has two states: bypass and closed. During the drilling operation, the valve sleeve and the valve body through hole are not closed, and the bypass valve is in the bypass state, allowing the mud in the drill string to bypass the motor and enter the annulus; when the mud flow and pressure reach the standard set value, the valve core moves downward to close the bypass valve. At this time, the mud flows through the motor and converts the pressure energy into mechanical energy; when the mud flow value is too small or the pump is stopped, the spring pushes up the valve core, and the bypass valve hole is in the open position-in the bypass state.

[0011] Preferably, a cavity flow channel is provided at the internal position of the external threaded connecting column and the fixed three-cone drill bit in the three-cone drill bit device, and the cavity flow channel is connected to the three internal threaded drill bit water holes.

[0012] Compared with the prior art, the present invention provides a screw drill with the function of preventing the water hole of the drill bit from being blocked, which has the following beneficial effects:

[0013] 1. The present invention sets the drill water hole in the fixed three-cone drill bit as an internally threaded drill water hole, and at the same time, an externally threaded slope soil-proof net device is sleeved at the internal position of the internally threaded drill water hole, so that when the screw drill tool is drilling, the externally threaded slope soil-proof net device can prevent mud from entering the internally threaded drill water hole, and the externally threaded slope soil-proof net device can synchronously discharge the mud, so that the internally threaded drill water hole can be used continuously without the need for staff to clean it, and the entire device can also continue to work, which not only improves work efficiency but also reduces the workload of staff.

[0014] 2. The present invention is equipped with an internally threaded drill bit water hole and an externally threaded slope soil-proof net device. By rotating the slope fixing column in the externally threaded slope soil-proof net device, the externally threaded connector is rotationally fixedly connected with the internally threaded drill bit water hole, so that the externally threaded slope soil-proof net device can prevent mud from entering the internally threaded drill bit water hole, and the externally threaded slope soil-proof net device can synchronously drain the mud. At the same time, the internally threaded drill bit water hole can be used continuously without the need for staff to clean it, and the entire device can continue to work, which not only improves work efficiency but also reduces the workload of staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 A schematic diagram of the structure of a screw drill tool for preventing the water hole of the drill bit from being blocked, proposed by the present invention;

[0017] Figure 2 A schematic diagram of the anatomical structure of the internal device proposed by the present invention;

[0018] Figure 3 A schematic diagram of the structure of a three-cone drill bit device proposed by the present invention;

[0019] Figure 4 It is a partial enlarged structural schematic diagram of the three-cone drill bit device proposed by the present invention;

[0020] Figure 5 Schematic diagram of the structure of the external thread slope soil protection net device proposed by the present invention

[0021] In the figure: 1. three-cone drill bit device; 11. external thread connection column; 12. fixed three-cone drill bit; 13. external thread slope earth-proof net device; 131. slope fixing column; 132. external thread connection body; 133. fixed earth-proof net device; 14. internal thread drill bit water eye; 2. bypass valve; 3. fixed sleeve column; 4. hydraulic motor device; 5. universal shaft device; 6. transmission shaft component device. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-5The present invention provides a technical solution: a screw drill with the function of preventing the water hole of the drill bit from being blocked, comprising a fixed sleeve column 3 and a three-cone drill bit device 1, the shape structure of the fixed sleeve column 3 is set to a hollow cylindrical structure, the thickness of the fixed sleeve column 3 is set to eight millimeters, and the inner and outer walls of the fixed sleeve column 3 are provided with anti-rust coatings. In order to better fix the connection with the external equipment and also improve the service life and bearing capacity, a hydraulic motor device 4 is provided at the inner position on the right side of the fixed sleeve column 3, and the hydraulic motor device 4 is composed of a stator and a rotor; the stator is formed by injecting a rubber bushing on the inner wall of a steel pipe, and its inner hole is a spiral with certain geometric parameters; the rotor is a hard layer Screw; the rotor and the stator mesh with each other, and a spiral sealing chamber is formed by the lead difference between the two to complete the energy conversion. The hydraulic motor device 4 is connected to the universal shaft device 5 through the rotor. The output torque of the hydraulic motor device 4 is proportional to the motor pressure drop, and the output speed is proportional to the input mud flow. As the load increases, the drilling tool speed decreases. A universal shaft device 5 is sleeved on the left outer wall of the hydraulic motor device 4. The universal shaft device 5 is composed of a universal shaft and a universal shaft housing, and the universal shaft housing is located at both ends of the universal shaft. The universal shaft device 5 is connected to the hydraulic motor device 4 on the upper side and the transmission shaft component device 6 on the lower side. The function of the universal shaft device 5 is to The star motion is converted into the fixed-axis rotation of the transmission shaft component device 6, and the torque and speed generated by the hydraulic motor device 4 are transmitted to the transmission shaft component device 6 to the three-cone drill bit device 1. The universal joint device 5 is located at the internal position of the fixed sleeve column 3. The transmission shaft component device 6 is sleeved at the left position of the universal joint device 5. The transmission shaft component device 6 is located at the internal position of the left side of the fixed sleeve column 3. The transmission shaft component device 6 is composed of a transmission shaft and a push bearing, and the push bearing is located at the upper and lower sides of the transmission shaft. The transmission shaft component device 6 is connected to the universal joint device 5 and the bypass valve 2 respectively through the push bearing. The function of the transmission shaft component device 6 is to transmit the rotational power of the hydraulic motor device 4 The bypass valve 2 is connected to the left side of the transmission shaft component 6, and the bypass valve 2 is composed of a valve body, a valve sleeve, a valve core and a spring. The valve core slides in the valve sleeve under pressure, and the movement of the valve core changes the flow direction of the liquid, so that the bypass valve 2 has two states: bypass and closed. During the drilling operation, the valve sleeve and the valve body through hole are not closed, and the bypass valve 2 is in the bypass state, so that the mud in the drill string bypasses the motor and enters the annulus; when the mud flow and pressure reach the standard setting value, the valve core moves down and closes the bypass valve 2. At this time, the mud flows through the motor and converts the pressure energy into mechanical energy.When the mud flow value is too small or the pump is stopped, the spring pushes up the valve core, and the bypass valve hole is in the open position - in the bypass state. The bypass valve 2 works to balance the pressure difference between the inside and outside of the drill tool when drilling, and also to connect the drill string and the annulus, so that the mud will not pollute the well platform. The bypass valve 2 is located on the left side of the fixed sleeve 3. A three-cone drill bit device 1 is sleeved on the left side of the bypass valve 2. The three-cone drill bit device 1 includes an externally threaded connecting column 11, a fixed three-cone drill bit 12, an externally threaded slope soil protection net device 13 and an internally threaded drill bit water eye 14. An externally threaded connecting column 11 is arranged at the middle position of the lower end of the fixed three-cone drill bit 12. The three-cone drill bit device 1 is provided with a cavity flow channel at the internal position of the external thread connection column 11 and the fixed three-cone drill bit 12, and the cavity flow channel is connected with the three internal thread drill bit water holes 14. The cavity flow channel is connected with the three internal thread drill bit water holes 14, so that the resistance of the drilling fluid in the cavity flow channel inside the fixed three-cone drill bit 12 is minimized, so that the internal thread drill bit water holes 14 can better remove the rock cuttings, and at the same time, the three-cone drill bit device 1 can continue to work, and the work efficiency is improved. The internal thread drill bit water holes 14 are provided at the internal positions on the left and right sides of the front of the fixed three-cone drill bit 12 and the internal position in the middle of the rear. The internal positions of the three internal thread drill bit water holes 14 An externally threaded slope soil-proof net device 13 is sleeved at the outer wall, and the externally threaded slope soil-proof net device 13 includes a slope fixing column 131, an externally threaded connecting body 132 and a fixed soil-proof net device 133. The externally threaded connecting body 132 is arranged at the outer wall position below the slope fixing column 131, and the fixed soil-proof net device 133 is arranged at the middle inner position of the slope fixing column 131. The externally threaded slope soil-proof net device 13 is fixedly connected with the internally threaded drill water hole 14 through the slope fixing column 131 and the externally threaded connecting body 132. By rotating the slope fixing column 131 in the externally threaded slope soil-proof net device 13, the externally threaded connecting body 132 and the internally threaded drill water hole 14 are fixedly connected. Rotate and fix the connection, so that the external thread slope soil-proof net device 13 can prevent the soil from entering the internal thread drill bit water hole 14, and the external thread slope soil-proof net device 13 can synchronously drain the soil, which is also convenient for the staff to replace it. At the same time, the internal thread drill bit water hole 14 can be used continuously without the need for the staff to clean it, and the entire device can continue to work, thereby improving the work of the entire device and reducing the workload of the staff. At the same time, the internal thread drill bit water hole 14 can better remove the rock cuttings, and the resistance of the drilling fluid in the internal cavity flow channel of the fixed three-cone drill bit 12 is minimized. ;

[0024] Working principle and use process of the present invention: After the present invention is installed, the staff will fix the fixed sleeve column 3 with the external equipment. When the external equipment is working, it will drive the fixed sleeve column 3 to rotate, so that the liquid motor device 4 will work. At this time, the rotor in the liquid motor device 4 will rotate around the stator, so that the rotor in the liquid motor device 4 will drive the universal shaft device 5 to rotate, which will drive the transmission shaft component device 6 to rotate. When the transmission shaft component device 6 rotates, The bypass valve 2 will rotate, and the piston and spring inside the bypass valve 2 will work, so that the three-cone drill bit device 1 will perform rotary drilling. When the three-cone drill bit device 1 performs rotary drilling, the fixed three-cone drill bit 12 will drill the soil and discharge it. At the same time, the fixed soil-proof net device 133 in the externally threaded slope soil-proof net device 13 will prevent the soil from entering the internally threaded drill bit water hole 14, and the slope fixed column 131 and the fixed soil-proof net device 133 in the externally threaded slope soil-proof net device 13 can discharge the soil in time. Therefore, the internal thread drill bit water hole 14 can better perform the work of clearing rock cuttings, and at the same time, the resistance of the drilling fluid in the internal cavity flow channel of the fixed three-cone drill bit 12 is minimized, so that the fixed three-cone drill bit 12 can better perform the drilling work, and there is no need for the staff to clean the internal thread drill bit water hole 14, and the whole device can also work continuously. In addition, when the whole device is used for a long time, the fixed anti-soil net device 133 in the external thread slope anti-soil net device 13 will be damaged, so before using the device, the staff needs to check the external thread slope in advance. Check whether the fixed soil-proof net device 133 in the slope soil-proof net device 13 is damaged. If the fixed soil-proof net device 133 is damaged, the staff can rotate the slope fixed column 131 in the externally threaded slope soil-proof net device 13 to rotate and separate the externally threaded connector 132 and the internally threaded drill bit water hole 14, thereby separating the externally threaded slope soil-proof net device 13 from the internally threaded drill bit water hole 14, making it convenient for the staff to replace the new externally threaded slope soil-proof net device 13. If the fixed soil-proof net device 133 is not damaged, it can be used directly. This is the working principle of the entire equipment.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screw drill having the function of preventing the water hole of a drill bit from being blocked, comprising a fixed sleeve (3) and a three-cone drill bit device (1), characterized in that: A hydraulic motor device (4) is provided at an inner position on the right side of the fixed sleeve column (3); a universal shaft device (5) is sleeved at an outer wall position on the left side of the hydraulic motor device (4); the universal shaft device (5) is located at an inner position of the fixed sleeve column (3); a transmission shaft component device (6) is sleeved at a left position of the universal shaft device (5); the transmission shaft component device (6) is located at an inner position on the left side of the fixed sleeve column (3); a bypass valve (2) is sleeved at a left position of the transmission shaft component device (6); the bypass valve (2) is located at a left position of the fixed sleeve column (3); a three-cone drill bit device (1) is sleeved at a left position of the bypass valve (2); the three-cone drill bit device (1) comprises an externally threaded connecting column (11), a fixed three-cone drill bit (12), an externally threaded slope soil protection net device (13) and an internally threaded drill bit water eye (14); the fixed three-cone drill bit ( 12) an externally threaded connection column (11) is provided at the middle position of the lower end; internally threaded drill water holes (14) are provided at the inner positions of the left and right sides in front of the fixed three-cone drill bit (12) and at the middle inner position in the rear; externally threaded slope soil prevention net devices (13) are sleeved at the inner positions of the three internally threaded drill water holes (14); the externally threaded slope soil prevention net device (13) comprises a slope fixing column (131), an externally threaded connection body (132) and a fixed soil prevention net device (133); an externally threaded connection body (132) is provided at the outer wall position below the slope fixing column (131); a fixed soil prevention net device (133) is provided at the middle inner position of the slope fixing column (131); the externally threaded slope soil prevention net device (13) is fixedly connected to the internally threaded drill water holes (14) via the slope fixing column (131) and the externally threaded connection body (132); The shape and structure of the fixed sleeve column (3) is set to be a hollow cylindrical structure; the hydraulic motor device (4) is composed of a stator and a rotor; A cavity flow channel is provided at an internal position of the externally threaded connecting column (11) and the fixed three-cone drill bit (12) in the three-cone drill bit device (1), and the cavity flow channel is connected to three internally threaded drill bit water holes (14).

2. A screw drill having the function of preventing the water hole of the drill bit from being blocked according to claim 1, characterized in that: The thickness of the fixed sleeve column (3) is set to eight millimeters, and anti-rust coatings are provided at the inner and outer walls of the fixed sleeve column (3).

3. The screw drill having the function of preventing the water hole of the drill bit from being blocked according to claim 1, characterized in that: The stator is made by injecting a rubber bushing on the inner wall of a steel tube, and its inner hole is a spiral with certain geometric parameters; The rotor is a screw with a hard layer; the rotor and the stator mesh with each other, and a spiral sealing cavity is formed by the lead difference between the two to complete energy conversion. The liquid motor device (4) is connected to the universal shaft device (5) through the rotor.

4. The screw drill with the function of preventing the water hole of the drill bit from being blocked according to claim 1, characterized in that: The cardan shaft device (5) is composed of a cardan shaft and a cardan shaft housing, and the cardan shaft housing is located at both ends of the cardan shaft. The cardan shaft device (5) is connected to the liquid motor device (4) at the top and the transmission shaft component device (6) at the bottom.

5. The screw drill having the function of preventing the water hole of the drill bit from being blocked according to claim 1, characterized in that: The transmission shaft component device (6) is composed of a transmission shaft and a thrust bearing, and the thrust bearing is located at upper and lower sides of the transmission shaft. The transmission shaft component device (6) is respectively connected to the universal shaft device (5) and the bypass valve (2) through the thrust bearing.

6. The screw drill tool with the function of preventing the water hole of the drill bit from being blocked according to claim 1, characterized in that: The bypass valve (2) is composed of a valve body, a valve sleeve, a valve core and a spring. Under the action of pressure, the valve core slides in the valve sleeve. The movement of the valve core changes the flow direction of the liquid, so that the bypass valve (2) has two states: bypass and closed.

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