Turbine type underground propeller

Abstract

The utility model discloses a turbo type underground propeller, which relates to the field of underground propellers, and comprises an outer pipe and a filter sleeve arranged in the left side of the outer pipe, a double-turbine set is arranged on the right side of the filter sleeve, a turbine cavity is arranged on the right side of the double-turbine set, a turbine driving shaft is arranged between the turbine cavity and the double-turbine set, and the turbine driving shaft is connected with the outer pipe. A sliding sleeve is arranged at the right end of the outer pipe, and a shaft barrel is arranged on the left side of the sliding sleeve. The turbo type underground propeller is a tool for generating axial self-excitation pulse by utilizing rotation of a turbine. The tool can well solve the problems of poor drillability, low mechanical rotating speed, long drilling period and the like in the drilling process of a deep well hard formation, the drilling speed is improved, during drilling, a whole drill column smoothly enters the well bottom, a drilling tool is protected, meanwhile, the smoothness of a well hole is improved, and the drilling efficiency is improved. And safety accidents of workers during use are avoided, so that the safety of the device during use is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of downhole thrusters, in particular to a turbine downhole thruster. Background Art

[0002] The turbine downhole thruster is a downhole thruster that uses the rotation of the turbine to generate axial self-excited pulses. It is a tool for increasing the drilling speed in oil drilling projects.

[0003] In the existing technology, screw-driven hydraulic oscillators can effectively increase drilling speed, but they also have the disadvantages of short service life, severe erosion of parts, and high pressure loss.

[0004] In order to overcome the above-mentioned shortcomings, a Chinese patent of the prior art (publication number CN108131100A) discloses a hydraulic oscillator. The valve shaft assembly includes a valve shaft fixedly connected to the housing and a valve sleeve rotatably mounted on the valve shaft. The valve shaft has an axial flow channel, a return flow channel connected to the axial flow channel, and a plurality of first liquid guide holes connected to the axial flow channel and arranged in an annular manner along the circumference of the valve shaft. The valve sleeve has a plurality of second liquid guide holes arranged in an annular manner along its circumference and connected to each first liquid guide hole. When the first liquid guide hole and the second liquid guide hole are connected, a folding flow channel is formed. Through the periodic formation and disconnection of the folding flow channel, a violent water hammer phenomenon is formed in the housing, forming an oscillation force. An annular flow channel connected to the return flow channel is formed between the valve sleeve and the housing. The above-mentioned valve shaft assembly is a full metal part. The hydraulic oscillator as a whole has no rubber parts, has a long service life, and has low equipment production and maintenance costs.

[0005] Although the existing technology can overcome the above-mentioned deficiencies, other problems still exist during its operation. For example, when developing deep wells, the pressure on the device is relatively high, which can easily cause the device to collapse and is not conducive to the protection of the drilling tool. Utility Model Content

[0006] The purpose of the present invention is to provide a turbine downhole thruster to solve the problem in the background art that during deep well development, the pressure on the device is high, which easily causes the device to collapse and is not conducive to the protection of the drilling tool.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a turbine downhole thruster, comprising an outer tube and a filter sleeve disposed inside the left side of the outer tube, and a twin turbine group disposed on the right side of the filter sleeve;

[0008] A turbine cavity is provided on the right side of the twin turbine group, and a turbine drive shaft is provided between the turbine cavity and the twin turbine group;

[0009] A sliding sleeve is provided at the right end of the outer tube, and a shaft cylinder is provided on the left side of the sliding sleeve, and an axial pulse reversing cavity is provided on the left side of the sliding sleeve, and a pulse piston is provided on the outer side of the left end of the axial pulse reversing cavity, a disc spring is provided between the pulse piston and the axial pulse reversing cavity, and an axial pulse valve is provided at the center of the left end of the axial pulse reversing cavity.

[0010] Furthermore, the right side of the outer tube is threadedly connected to the sliding sleeve, and the sliding sleeve is nested and connected to the shaft cylinder through a pore.

[0011] Furthermore, the axial pulse commutation cavity and the sliding sleeve are connected via threads, and the disc spring is placed on the surface of the axial pulse commutation cavity through a hole fit.

[0012] Furthermore, the pulse piston and the axial pulse reversing cavity are nested and connected via a pore, and the axial pulse reversing cavity and the turbine cavity are threadedly connected.

[0013] Furthermore, the axial pulse valve is placed in the axial pulse reversing cavity through hole-shaft clearance fit, and the turbine drive shaft and the axial pulse valve are connected together through threads.

[0014] Furthermore, the twin turbine group and the turbine cavity are connected together by threads, and the filter sleeve and the twin turbine group are welded together after being fitted with a hole-shaft clearance.

[0015] Furthermore, an axial pulse valve notch is provided inside the axial pulse valve, and an upper notch of the pulse reversing cavity is provided between the lower left end of the axial pulse valve and the pulse piston, and a lower notch of the pulse reversing cavity is provided between the lower right end of the axial pulse valve and the axial pulse reversing cavity.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The turbine downhole thruster is a tool that uses turbine rotation to generate axial self-excited pulses. This tool can effectively solve the problems of poor drillability, low mechanical speed, and long drilling cycles that occur during deep well drilling in hard formations, thereby increasing drilling speed.

[0018] 2. Furthermore, during drilling, the entire drill string can smoothly enter the bottom of the well, protecting the drilling tools and improving the smoothness of the wellbore, thus avoiding safety accidents during use by workers and improving the safety of the device.

[0019] Furthermore, during use, impurities are filtered through the filter sleeve to prevent the impurities from entering the interior of the device and causing damage to the internal connections of the device, which can effectively increase the service life of the device and prevent the device from being easily worn and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the utility model from the left side;

[0023] Figure 4 For this utility model Figure 2 A in the middle is an enlarged structural diagram;

[0024] Figure 5 This is a schematic diagram of the front cross-sectional structure of the pulse piston of the utility model;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the disc spring of the utility model.

[0026] In the figure: 1. Outer tube; 2. Filter sleeve; 3. Twin turbine group; 4. Turbine drive shaft; 5. Turbine cavity; 6. Axial pulse valve; 7. Axial pulse reversing cavity; 8. Pulse piston; 9. Disc spring; 10. Shaft cylinder; 11. Sliding sleeve; 12. Upper notch of pulse reversing cavity; 13. Axial pulse valve notch; 14. Lower notch of pulse reversing cavity. DETAILED DESCRIPTION

[0027] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0028] Example 1:

[0029] like Figures 1-6The technical solution shown, in order to solve the problem that the device is easily damaged when under high pressure, discloses: a turbine cavity 5 is provided on the right side of the twin turbine group 3, and a turbine drive shaft 4 is provided between the turbine cavity 5 and the twin turbine group 3, a sliding sleeve 11 is provided on the right end of the outer tube 1, and a shaft cylinder 10 is provided on the left side of the sliding sleeve 11, and an axial pulse reversing cavity 7 is provided on the left side of the sliding sleeve 11, and a pulse piston 8 is provided on the outer side of the left end of the axial pulse reversing cavity 7, the right side of the outer tube 1 is threadedly connected to the sliding sleeve 11, and the sliding sleeve 11 is nested with the shaft cylinder 10 through a pore, and the pulse piston 8 is connected to the outer tube 1 The axial pulse reversing cavities 7 are nested and connected through pores, and the axial pulse reversing cavity 7 is threadedly connected to the turbine cavity 5. The axial pulse valve 6 is placed in the axial pulse reversing cavity 7 through the hole-shaft clearance fit, and the turbine drive shaft 4 and the axial pulse valve 6 are connected together through threads. An axial pulse valve notch 13 is provided inside the axial pulse valve 6, and a pulse reversing cavity upper notch 12 is provided between the left lower end of the axial pulse valve 6 and the pulse piston 8, and a pulse reversing cavity lower notch 14 is provided between the right lower end of the axial pulse valve 6 and the axial pulse reversing cavity 7;

[0030] In the embodiment, after the drilling fluid flows through the twin turbine group 3, the twin turbine group 3 drives the turbine drive shaft 4 to rotate. Since the axial pulse valve 6 and the turbine drive shaft 4 are connected together by threads, the turbine drive shaft 4 and the axial pulse valve 6 will rotate together. An axial pulse valve slot 13 is provided on the axial pulse valve 6 for the circulation of drilling fluid. A slot is provided on the axial pulse reversing cavity 7, and when the axial pulse valve slot 13 is connected to the lower slot 14 of the pulse reversing cavity, the drilling fluid flows in from the upper slot 12 of the pulse reversing cavity and flows out from the lower slot 14 of the pulse reversing cavity, causing the pulse piston 8 to impact the disc spring 9 downward, thereby generating a self-excited pulse. When the axial pulse valve slot 13 is not connected to the lower slot 14 of the pulse reversing cavity, under the action of the disc spring 9, the pulse piston 8 moves upward, thereby generating a self-excited pulse;

[0031] Example 2:

[0032] like Figures 1-6 The technical solution shown is based on Example 1 and, in order to solve the problem of generating too few pulses, discloses: a disc spring 9 is provided between the pulse piston 8 and the axial pulse reversing cavity 7, and an axial pulse valve 6 is provided at the center of the left end of the axial pulse reversing cavity 7. The axial pulse reversing cavity 7 is connected to the sliding sleeve 11 by a threaded connection, and the disc spring 9 is placed on the surface of the axial pulse reversing cavity 7 through a hole.

[0033] In the embodiment, after the drilling fluid flows through the twin turbine group 3, the twin turbine group 3 drives the turbine drive shaft 4 to rotate. Since the axial pulse valve 6 and the turbine drive shaft 4 are connected together by threads, the turbine drive shaft 4 and the axial pulse valve 6 will rotate together. An axial pulse valve slot 13 is provided on the axial pulse valve 6 for the circulation of drilling fluid. A slot is provided on the axial pulse reversing cavity 7, and when the axial pulse valve slot 13 is connected to the lower slot 14 of the pulse reversing cavity, the drilling fluid flows in from the upper slot 12 of the pulse reversing cavity and flows out from the lower slot 14 of the pulse reversing cavity, causing the pulse piston 8 to impact the disc spring 9 downward, thereby generating a self-excited pulse. When the axial pulse valve slot 13 is not connected to the lower slot 14 of the pulse reversing cavity, the pulse piston 8 moves upward under the action of the disc spring 9, thereby generating a self-excited pulse. For every rotation of the turbine, the pulse piston 8 moves up and down four times, generating four self-excited pulses;

[0034] Example 3:

[0035] like Figures 1-6 The technical solution shown is based on the first and second embodiments. To solve the problem of impurities entering the device and causing damage to the device, the following are disclosed: an outer tube 1 and a filter sleeve 2 disposed inside the left side of the outer tube 1, and a twin turbine group 3 disposed on the right side of the filter sleeve 2. The twin turbine group 3 and the turbine cavity 5 are connected together by threads, and the filter sleeve 2 and the twin turbine group 3 are welded together after the hole-axis clearance is matched.

[0036] In the embodiment, after the drilling fluid flows into the interior of the tool, the impurities in the drilling fluid will be filtered out by the filter sleeve 2. After the drilling fluid flows through the twin turbine group 3, the twin turbine group 3 drives the turbine drive shaft 4 to rotate. Since the axial pulse valve 6 and the turbine drive shaft 4 are connected together by threads, the turbine drive shaft 4 and the axial pulse valve 6 will rotate together. An axial pulse valve slot 13 is provided on the axial pulse valve 6 for the circulation of drilling fluid. A slot is provided on the axial pulse reversing cavity 7. When the axial pulse valve slot 13 is connected to the lower slot 14 of the pulse reversing cavity, the drilling fluid flows in from the upper slot 12 of the pulse reversing cavity and flows out from the lower slot 14 of the pulse reversing cavity, causing the pulse piston 8 to impact the disc spring 9 downward, thereby generating a self-excited pulse. When the axial pulse valve slot 13 is not connected to the lower slot 14 of the pulse reversing cavity, under the action of the disc spring 9, the pulse piston 8 moves upward, thereby generating a self-excited pulse. Every time the turbine rotates one circle, the pulse piston 8 moves up and down four times, generating four self-excited pulses.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A turbine downhole thruster, comprising an outer tube (1) and a filter sleeve (2) arranged inside the left side of the outer tube (1), and a twin turbine group (3) is arranged on the right side of the filter sleeve (2); Its characteristics are: A turbine cavity (5) is provided on the right side of the twin turbine group (3), and a turbine drive shaft (4) is provided between the turbine cavity (5) and the twin turbine group (3); A sliding sleeve (11) is provided at the right end of the outer tube (1), and a shaft cylinder (10) is provided on the left side of the sliding sleeve (11), and an axial pulse reversing cavity (7) is provided on the left side of the sliding sleeve (11), and a pulse piston (8) is provided on the outer side of the left end of the axial pulse reversing cavity (7), a disc spring (9) is provided between the pulse piston (8) and the axial pulse reversing cavity (7), and an axial pulse valve (6) is provided at the center of the left end of the axial pulse reversing cavity (7).

2. A turbine downhole thruster according to claim 1, characterized in that: The right side of the outer tube (1) is threadedly connected to the sliding sleeve (11), and the sliding sleeve (11) is nested and connected to the shaft cylinder (10) through a pore.

3. The turbine downhole thruster according to claim 1, characterized in that: The axial pulse reversing cavity (7) and the sliding sleeve (11) are connected via threads, and the disc spring (9) is placed on the surface of the axial pulse reversing cavity (7) through a hole fit.

4. The turbine downhole thruster according to claim 1, characterized in that: The pulse piston (8) and the axial pulse reversing cavity (7) are connected via a hole nesting connection, and the axial pulse reversing cavity (7) and the turbine cavity (5) are threadedly connected.

5. The turbine downhole thruster according to claim 1, characterized in that: The axial pulse valve (6) is placed in the axial pulse reversing cavity (7) through hole-shaft clearance fit, and the turbine drive shaft (4) and the axial pulse valve (6) are connected together through threads.

6. The turbine downhole thruster according to claim 1, characterized in that: The twin turbine group (3) and the turbine cavity (5) are connected together via threads, and the filter sleeve (2) and the twin turbine group (3) are welded together after being fitted with a hole-shaft clearance.

7. The turbine downhole thruster according to claim 1, characterized in that: An axial pulse valve notch (13) is provided inside the axial pulse valve (6), an upper pulse reversing cavity notch (12) is provided between the left lower end of the axial pulse valve (6) and the pulse piston (8), and a lower pulse reversing cavity notch (14) is provided between the right lower end of the axial pulse valve (6) and the axial pulse reversing cavity (7).

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