Screw drill assembly structure for oil exploitation

Abstract

The invention is suitable for the technical field of oil exploitation, and provides a screw drill assembly structure for oil exploitation, the screw drill assembly structure is sequentially provided with a transmission shaft assembly, a universal shaft assembly and a motor assembly from left to right, and the right end of the motor assembly is connected with a bypass valve assembly; the motor assembly comprises a motor, the motor comprises a motor shell, a stator is arranged in the motor shell, and the right end of the stator is connected with a rotor; the transmission shaft assembly comprises a transmission shaft shell, an upper radial bearing is annularly arranged in the transmission shaft shell, a lower radial bearing is annularly arranged in the upper radial bearing, balls are arranged between the upper radial bearing and the lower radial bearing, and a transmission shaft connecting rod is arranged in the lower radial bearing. According to the scheme, large-torque operation can be provided, good power is provided for well drilling, and the safety and reliability of well drilling operation are effectively improved through the anti-disengaging assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of oil mining, and in particular relates to a screw drill assembly structure for oil mining. Background Art

[0002] Oil production is the process of extracting crude oil from underground reservoirs. Generally, geological surveys and seismic exploration techniques are used to identify potential oil reserves, and then exploratory wells are drilled to assess the size of the reservoir and the quality of the oil. Large drilling equipment is used to penetrate underground rock formations until the oil layer is reached. Drilling can be vertical or horizontal, the latter of which is sometimes used to increase the efficiency of oil recovery.

[0003] Screw drill tools are used in oil drilling and mining. Screw drill tools are usually used to help improve efficiency in deep well drilling, or provide better power transmission and control in some complex formation conditions. Screw drill tools are mainly used in oil and gas drilling to provide the power and propulsion required in the drilling process. Screw drill tools are usually composed of a screw (or spiral drill rod) and a drill bit. The spiral design can help the tool advance more effectively and increase drilling efficiency, especially suitable for drilling deep wells or complex formations.

[0004] However, there are some problems with traditional screw drills during use, such as wear of the drill, low drilling efficiency, and poor adaptability to complex formations. These problems not only affect the progress of drilling operations, but also increase the cost of mining. Therefore, improving the performance and reliability of screw drills is a technical problem that needs to be solved urgently in the oil mining industry. The present invention proposes a screw drill assembly structure for oil mining, which aims to solve the above problems, improve drilling efficiency and reliability, and reduce mining costs. Summary of the invention

[0005] The purpose of the present invention is to provide a screw drill assembly structure for oil production to solve the problems in the prior art of wear, low drilling efficiency and poor adaptability to complex formations during use of traditional screw drills, which in turn affect the progress of drilling operations and increase production costs.

[0006] To achieve the above object, the present invention provides the following technical solutions: a screw drill assembly structure for oil mining, wherein the screw drill assembly structure is provided with a transmission shaft assembly, a universal shaft assembly and a motor assembly from left to right, and the right end of the motor assembly is connected to a bypass valve assembly;

[0007] The motor assembly includes a motor including a motor housing, a stator is arranged inside the motor housing, and a rotor is connected to the right end of the stator;

[0008] The cardan shaft assembly comprises a cardan shaft housing, and a cardan shaft connecting rod is arranged inside the cardan shaft housing;

[0009] The transmission shaft assembly includes a transmission shaft housing, an upper radial bearing is provided in an annular shape inside the transmission shaft housing, a lower radial bearing is provided in an annular shape inside the upper radial bearing, balls are provided between the upper radial bearing and the lower radial bearing, and a transmission shaft connecting rod is provided inside the lower radial bearing.

[0010] Preferably, the stator is a rubber bushing vulcanized on the inner wall of the motor housing, the rubber bushing is provided with an inner hole, and the inner hole is a cavity with a spiral surface adapted to the rotor.

[0011] Preferably, the rotor has a plurality of heads, and the number of inner holes of the rubber bushing is adapted to the rotor.

[0012] Preferably, the number of heads of the rotor is 1, 3, 4, 5, 7 or 9, and the number of inner holes of the rubber bushing corresponds to 2, 4, 5, 6, 8 or 10 holes respectively.

[0013] Preferably, the right end of the universal joint connecting rod is connected with a ball joint end.

[0014] Preferably, the cardan shaft connecting rod is a flexible shaft.

[0015] Preferably, a first anti-dropout component is provided at the left end of the transmission shaft assembly, the first anti-dropout component includes an anti-dropout short circuit, a first threaded portion is provided at the right end of the anti-dropout short circuit, the first threaded portion is threadedly connected to the transmission shaft housing, and an anti-dropout nut is commonly provided between the anti-dropout short circuit and the transmission shaft assembly.

[0016] Preferably, the bypass valve assembly comprises a bypass valve housing, a valve core is provided inside the bypass valve housing, a valve sleeve is provided on the left end of the valve core, and a spring is provided between the valve core and the valve sleeve.

[0017] Preferably, a second anti-detachment assembly is provided between the bypass valve assembly and the motor assembly, the second anti-detachment assembly includes an internal threaded portion and a second threaded portion, the second threaded portion is arranged at the left end of the bypass valve housing, the internal threaded portion is arranged on the inner wall of the motor housing, and the internal threaded portion and the second threaded portion are threadedly connected.

[0018] Preferably, a third anti-slip assembly is provided between the transmission shaft assembly and the universal shaft assembly, and the third anti-slip assembly includes a plurality of bar blocks, and the plurality of bar blocks are distributed in a ring shape on the right end of the transmission shaft housing, and the inner wall of the left end of the universal shaft housing is provided with a plurality of bar grooves distributed in a ring shape, and the bar grooves are adapted to the bar blocks.

[0019] The present invention has at least the following beneficial effects:

[0020] (1) The present invention provides a screw drill assembly structure for oil drilling, which can provide high torque operation through a multi-stage combination of a transmission shaft assembly, a universal shaft assembly, a motor assembly, and a bypass valve assembly, and provide good power for drilling, and is suitable for deep wells, hard geological wells, vertical wells, etc.

[0021] (2) The present invention provides a screw drill assembly structure for oil drilling. Through the design of the first anti-slip assembly, the second anti-slip assembly and the third anti-slip assembly, the safety and reliability of the drilling operation can be effectively improved, while ensuring high efficiency and low failure rate during the drilling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the transmission shaft assembly of the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of the cardan shaft assembly of the present invention.

[0025] In the accompanying drawings: 1. motor assembly; 11. motor housing; 12. stator; 13. rotor; 2. universal joint shaft assembly; 21. universal joint shaft housing; 22. universal joint shaft connecting rod; 23. ball joint end; 3. bypass valve assembly; 31. bypass valve housing; 32. valve core; 33. spring; 34. valve sleeve; 4. first anti-detachment assembly; 41. anti-detachment short circuit; 42. first threaded portion; 5. transmission shaft assembly; 51. transmission shaft connecting rod; 52. lower radial bearing; 53. ball; 54. upper radial bearing; 55. transmission shaft housing; 6. second anti-detachment assembly; 61. internal threaded portion; 62. second threaded portion; 7. third anti-detachment assembly; 71. bar block. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] Example

[0028] See also Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides a technical solution: a screw drill assembly structure for oil mining, the screw drill assembly structure is provided with a transmission shaft assembly 5, a universal shaft assembly 2 and a motor assembly 1 from left to right, and the right end of the motor assembly 1 is connected to a bypass valve assembly 3;

[0029] The motor assembly 1 includes a motor housing 11, a stator 12 is provided inside the motor housing 11, a rotor 13 is connected to the right end of the stator 12, the stator 12 is a rubber bushing vulcanized on the inner wall of the motor housing 11, the rubber bushing is provided with an inner hole, and the inner hole is a cavity with a spiral surface adapted to the rotor 13;

[0030] The cardan shaft assembly 2 comprises a cardan shaft housing 21, a cardan shaft connecting rod 22 is arranged inside the cardan shaft housing 21, a right end of the cardan shaft connecting rod 22 is connected with a ball joint end 23, and the cardan shaft connecting rod 22 is a flexible shaft;

[0031] The transmission shaft assembly 5 includes a transmission shaft housing 55, an upper radial bearing 54 is provided in an annular shape inside the transmission shaft housing 55, a lower radial bearing 52 is provided in an annular shape inside the upper radial bearing 54, a ball 53 is provided between the upper radial bearing 54 and the lower radial bearing 52, and a transmission shaft connecting rod 51 is provided inside the lower radial bearing 52;

[0032] The bypass valve assembly 3 comprises a bypass valve housing 31 . A valve core 32 is disposed inside the bypass valve housing 31 . A valve sleeve 34 is sleeved on the left end of the valve core 32 . A spring 33 is disposed between the valve core 32 and the valve sleeve 34 .

[0033] In this embodiment, the stator 12 and the rotor 13 in the motor assembly 1 are meshed, and the meshing points form a spiral sealing line along the axial direction to form sealed cavities. When the pressure medium (drilling fluid or compressed gas) enters these sealed cavities and flows from one end of the motor assembly 1 to the other end, it pushes the rotor 13 to rotate in the stator 12. This is the process of converting hydraulic energy into mechanical energy.

[0034] The function of the cardan shaft assembly 2 is to convert the plane planetary motion of the rotor 13 in the motor assembly 1 into the fixed axis motion of the transmission shaft, and at the same time transmit the working torque of the motor assembly 1 to the transmission shaft and the drill bit;

[0035] The function of the transmission shaft assembly 5 is to transmit the torque and rotation speed of the motor assembly 1 to the drill bit, and at the same time to withstand the axial force and radial force exerted on the drill bit by the formation during drilling;

[0036] The purpose of the bypass valve assembly 3 is to reduce or prevent the drilling fluid from flowing to the working surface of the drilling platform due to the drilling fluid filling the drill string when the drill is started. When the pump is turned on, the drilling fluid pressure forces the valve core 32 to move downward, causing the spring 33 to compress and close the channel on the bypass valve assembly 3. At this time, the screw drill can circulate the drilling fluid or drill normally; when the pump is stopped, the drilling fluid pressure disappears, the compressed spring 33 lifts the valve core 32, and the bypass valve assembly 3 is opened;

[0037] This solution can provide high torque operation and good power for drilling through the multi-stage combination of the transmission shaft assembly 5, the universal shaft assembly 2, the motor assembly 1 and the bypass valve assembly 3.

[0038] Furthermore, the number of heads of the rotor 13 is set to be several, and the number of inner holes of the rubber bushing is adapted to the number of the rotor 13 .

[0039] In this embodiment, the number of rotors 13 can be set as needed. The more rotors 13 have, the higher the torque is. Conversely, the fewer rotors 13 have, the higher the output speed of the motor assembly 1 is.

[0040] Furthermore, the number of heads of the rotor 13 is 1, 3, 4, 5, 7 or 9, and the number of inner holes of the rubber bushing corresponds to 2, 4, 5, 6, 8 or 10 holes respectively.

[0041] In this embodiment, a rotor 13 with 1, 3, 4, 5, 7 or 9 heads can be selected according to actual needs.

[0042] Furthermore, a first anti-dropout component 4 is provided at the left end of the transmission shaft assembly 5, and the first anti-dropout component 4 includes an anti-dropout short-circuit 41. A first threaded portion 42 is provided at the right end of the anti-dropout short-circuit 41. The first threaded portion 42 is threadedly connected to the transmission shaft housing 55, and an anti-dropout nut is commonly provided between the anti-dropout short-circuit 41 and the transmission shaft assembly 5.

[0043] In this embodiment, the function of the first anti-detachment component 4 is to prevent the transmission shaft component 5 from accidentally detaching from other parts of the drilling tool due to vibration or impact during the drilling process, thereby ensuring the safety and continuity of the drilling operation.

[0044] Furthermore, a second anti-detachment assembly 6 is provided between the bypass valve assembly 3 and the motor assembly 1. The second anti-detachment assembly 6 includes an internal threaded portion 61 and a second threaded portion 62. The second threaded portion 62 is arranged at the left end of the bypass valve housing 31, and the internal threaded portion 61 is arranged on the inner wall of the motor housing 11. The internal threaded portion 61 and the second threaded portion 62 are threadedly connected.

[0045] In this embodiment, the function of the second anti-detachment assembly 6 is to prevent the bypass valve assembly 3 from accidentally detaching from the motor assembly 1 due to pressure fluctuations or operational errors during the drilling process, thereby ensuring the stability and safety of the drilling operation.

[0046] Furthermore, a third anti-slip assembly 7 is provided between the transmission shaft assembly 5 and the universal shaft assembly 2. The third anti-slip assembly 7 includes a plurality of strip blocks 71. The plurality of strip blocks 71 are distributed in a ring shape on the right end of the transmission shaft housing 55. The inner wall of the left end of the universal shaft housing 21 is provided with a plurality of strip grooves distributed in a ring shape. The strip grooves are adapted to the strip blocks 71.

[0047] In this embodiment, the function of the third anti-detachment assembly 7 is to prevent the transmission shaft assembly 5 from accidentally detaching from the universal joint shaft assembly 2 due to excessive torque or improper operation during the drilling process, thereby ensuring the stability and safety of the drilling operation.

[0048] In summary, the screw drill assembly structure provided by the present invention not only improves the drilling efficiency, but also enhances the adaptability to complex formations, thereby reducing the mining cost. By adopting a combination of multi-stage components, the screw drill assembly structure of the present invention can provide greater torque, and is suitable for a variety of drilling environments such as deep wells, hard geological wells, and vertical wells. At the same time, through the design of the anti-slip assembly, high efficiency and low failure rate during the drilling process are ensured, and the safety and reliability of the operation are improved. In addition, the screw drill assembly structure of the present invention also has good maintainability and operability, and provides an efficient and reliable drilling solution for the oil extraction industry.

[0049] The basic principles, main features and advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0050] 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 assembly structure for oil mining, characterized in that: The screw drill assembly structure is provided with a transmission shaft assembly (5), a universal shaft assembly (2) and a motor assembly (1) in sequence from left to right, and the right end of the motor assembly (1) is connected to a bypass valve assembly (3); The motor assembly (1) comprises a motor and a motor housing (11), a stator (12) is arranged inside the motor housing (11), and a rotor (13) is connected to the right end of the stator (12); The cardan shaft assembly (2) comprises a cardan shaft housing (21), wherein a cardan shaft connecting rod (22) is arranged inside the cardan shaft housing (21); The transmission shaft assembly (5) comprises a transmission shaft housing (55), an upper radial bearing (54) is provided in an annular shape inside the transmission shaft housing (55), a lower radial bearing (52) is provided in an annular shape inside the upper radial bearing (54), a ball (53) is provided between the upper radial bearing (54) and the lower radial bearing (52), and a transmission shaft connecting rod (51) is provided inside the lower radial bearing (52).

2. The screw drill assembly structure for oil mining according to claim 1 is characterized by: The stator (12) is a rubber bushing vulcanized on the inner wall of the motor housing (11), the rubber bushing is provided with an inner hole, and the inner hole is a cavity with a spiral surface that matches the rotor (13).

3. The screw drill assembly structure for oil mining according to claim 2 is characterized in that: The number of heads of the rotor (13) is set to be several, and the number of inner holes of the rubber bushing is matched with the number of the rotor (13).

4. The screw drill assembly structure for oil mining according to claim 3 is characterized by: The number of heads of the rotor (13) is 1, 3, 4, 5, 7 or 9, and the number of inner holes of the rubber bushing corresponds to 2, 4, 5, 6, 8 or 10 holes.

5. The screw drill assembly structure for oil mining according to claim 1 is characterized by: The right end of the universal shaft connecting rod (22) is connected with a ball joint end (23).

6. The screw drill assembly structure for oil mining according to claim 5 is characterized by: The universal joint connecting rod (22) is a flexible shaft.

7. The screw drill assembly structure for oil mining according to claim 1 is characterized by: The left end of the transmission shaft assembly (5) is provided with a first anti-dropout assembly (4), the first anti-dropout assembly (4) includes an anti-dropout short circuit (41), the right end of the anti-dropout short circuit (41) is provided with a first threaded portion (42), the first threaded portion (42) is threadedly connected to the transmission shaft housing (55), and an anti-dropout nut is commonly provided between the anti-dropout short circuit (41) and the transmission shaft assembly (5).

8. The screw drill assembly structure for oil drilling according to claim 1 is characterized by: The bypass valve assembly (3) comprises a bypass valve housing (31), a valve core (32) is provided inside the bypass valve housing (31), a valve sleeve (34) is sleeved on the left end of the valve core (32), and a spring (33) is provided between the valve core (32) and the valve sleeve (34).

9. The screw drill assembly structure for oil mining according to claim 8 is characterized by: A second anti-detachment assembly (6) is provided between the bypass valve assembly (3) and the motor assembly (1), the second anti-detachment assembly (6) comprising an internal threaded portion (61) and a second threaded portion (62), the second threaded portion (62) being provided at the left end of the bypass valve housing (31), the internal threaded portion (61) being provided on the inner wall of the motor housing (11), and the internal threaded portion (61) and the second threaded portion (62) being threadedly connected.

10. The screw drill assembly structure for oil mining according to claim 1, characterized in that: A third anti-slip assembly (7) is provided between the transmission shaft assembly (5) and the universal shaft assembly (2), and the third anti-slip assembly (7) comprises a plurality of strip blocks (71), wherein the plurality of strip blocks (71) are distributed in an annular shape at the right end of the transmission shaft housing (55), and the inner wall of the left end of the universal shaft housing (21) is provided with a plurality of strip grooves distributed in an annular shape, and the strip grooves are adapted to the strip blocks (71).

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