Novel screw drill

Abstract

The utility model discloses a novel screw drill, which belongs to the field of screw drills and comprises a shell, and a bypass valve is arranged at the upper end of the shell. The drill bit is connected to the tail end of the transmission shaft through the hexagonal rod and used in cooperation with the vibration assembly, the vibration assembly can prevent the drill bit from falling off and can also form vibration in the drilling process to drive the drill bit to do reciprocating motion, the drill bit has the axial effect while rotating, and the drilling effect is improved; the first directional sleeve and the second directional sleeve are arranged, screw rods on the two directional sleeves are combined together to form a complete threaded rod, the threaded rod is used in cooperation with a nut, mounting and dismounting work is facilitated, balls are arranged on the inner sides of the directional sleeves, and therefore the whole drilling tool is prevented from deviating, and the service life of the drilling tool is prolonged. The directional assembly has the advantages that guide is achieved, movement of a drilling tool is not affected, the directional assembly can be flexibly mounted at a proper underground position by the aid of the fixed seat and the mounting seat, and mounting flexibility is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of screw drills, and in particular to a novel screw drill. Background Technology

[0002] A screw drill is a type of positive displacement downhole power drill that uses drilling fluid (such as mud or water) as its power source, converting the pressure energy of the fluid into mechanical energy. It is widely used in oil drilling, geological exploration, mineral resource development, and other fields, and is particularly suitable for drilling operations in vertical wells, directional wells, and horizontal wells, as well as drilling, milling, and sidetracking operations in well workover.

[0003] When using existing screw drills, the drill bit usually only has a rotational effect while the drive shaft rotates it, without any additional thrust in the axial direction. This results in low drilling efficiency. In addition, since screw drills do not have an anti-deviation structure, they are prone to deviation during drilling, which affects drilling accuracy and overall performance. Utility Model Content

[0004] The main objective of this invention is to provide a novel screw drill bit that can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A novel screw drill bit includes a housing, a bypass valve at the upper end of the housing, a motor assembly at the upper end of the housing interior, a universal joint and a drive shaft installed inside the housing, a drill bit connected to the end of the drive shaft, a vibration assembly on the drill bit located inside the housing, and an orientation assembly installed on the outer surface of the housing.

[0007] Preferably, the housing is provided with an anti-drop block inside, and a hexagonal rod is fixed on the drill bit, and the hexagonal rod is movably connected to the drive shaft.

[0008] Preferably, the motor assembly includes a stator and a rotor, the stator being fixed inside the housing and the rotor being mounted inside the stator.

[0009] Preferably, the vibration assembly includes a mounting sleeve, a first spring, a second spring, and contact plates. The mounting sleeve is fitted onto the drill bit and fixed to the drill bit by countersunk bolts. The first spring and the second spring are mounted on the mounting sleeve, and the two contact plates are respectively fixed to the ends of the first spring and the second spring.

[0010] Preferably, the orientation component includes a first orientation sleeve, a second orientation sleeve, a first half-screw, a second half-screw, a nut, a ball bearing, a fixing seat, a mounting seat, and a fixing screw. The first orientation sleeve is fixedly connected to the first half-screw, and the second orientation sleeve is fixedly connected to the second half-screw. The second orientation sleeve and the first orientation sleeve are sleeved on the outer shell. The first half-screw and the second half-screw form a complete threaded rod, and the nut is connected to the threaded rod.

[0011] Preferably, the ball bearing is installed inside the first directional sleeve and the second directional sleeve, and the two fixing seats are respectively fixed to the lower ends of the first directional sleeve and the second directional sleeve. A pin is installed through the fixing seat and the mounting seat, and the pin is fixedly connected to the mounting seat. The pin is rotatably connected to the fixing seat, and the fixing screw is threadedly connected to the fixing seat, with the end of the fixing screw abutting against the pin.

[0012] Compared with the prior art, this utility model has the following beneficial effects: In this novel screw drill, the drill bit is connected to the end of the transmission shaft via a hexagonal rod and used in conjunction with a vibration assembly. The vibration assembly can prevent the drill bit from falling off and can also generate vibration during drilling, causing the drill bit to reciprocate. This allows the drill bit to have axial action while rotating, improving the drilling effect. A directional assembly is installed on the outer shell to guide the entire drill and prevent it from deviating, ensuring the effectiveness of use. A first directional sleeve and a second directional sleeve are provided, and the screws on the two directional sleeves are joined together to form a complete threaded rod, which is used in conjunction with a nut to facilitate installation and disassembly. Ball bearings are provided on the inner side of the directional sleeve to guide the drill without affecting its movement. Through the provided fixed seat and mounting seat, the directional assembly can be flexibly installed in a suitable position downhole, ensuring installation flexibility. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the outer shell of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the vibration component of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the directional component of this utility model.

[0017] In the diagram: 1. Housing; 2. Bypass valve; 3. Motor assembly; 4. Anti-fall block; 5. Universal joint; 6. Drive shaft; 7. Drill bit; 8. Vibration assembly; 801. Mounting sleeve; 802. First spring; 803. Second spring; 804. Contact plate; 9. Orientation assembly; 901. First orientation sleeve; 902. Second orientation sleeve; 903. First half-screw; 904. Second half-screw; 905. Nut; 906. Ball bearing; 907. Fixing seat; 908. Mounting seat; 909. Fixing screw; 10. Hexagonal rod. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] like Figures 1-4 As shown, a novel screw drill includes a housing 1, with a bypass valve 2 at its upper end. A motor assembly 3 is located inside the upper part of the housing 1. A universal joint 5 and a drive shaft 6 are installed inside the housing 1, and a drill bit 7 is connected to the end of the drive shaft 6. A vibration assembly 8 is mounted on the drill bit 7 and is located inside the housing 1. A directional assembly 9 is mounted on the outer surface of the housing 1. An anti-drop block 4 is provided inside the housing 1. A hexagonal rod 10 is fixed to the drill bit 7 and is movably connected to the drive shaft 6. The motor assembly 3 includes a stator and a rotor. The stator is fixed inside the housing 1, and the rotor is installed inside the stator.

[0020] When using a screw drill bit, the directional component 9 on the outer surface of the housing 1 provides directional guidance, preventing deviation. When the high-pressure drilling fluid output from the mud pump flows through the bypass valve 2, the bypass valve 2 opens under pressure, allowing the drilling fluid to enter the motor assembly 3 inside the housing 1. The rotor in the motor assembly 3 is then rotated inside the stator, thereby rotating the drill bit 7 via the universal joint 5 and drive shaft 6. Drilling operations can then be performed using the drill bit 7. During drilling, the vibration component 8 generates vibration, causing the drill bit 7 to reciprocate, thus applying axial force and improving drilling efficiency. Simultaneously, the hexagonal rod 10 provides transmission without affecting the transmission effect.

[0021] According to the above implementation scheme, the vibration assembly 8 includes a mounting sleeve 801, a first spring 802, a second spring 803, and a contact plate 804. The mounting sleeve 801 is sleeved on the drill bit 7 and is fixed to the drill bit 7 by countersunk bolts. The first spring 802 and the second spring 803 are mounted on the mounting sleeve 801, and the two contact plates 804 are respectively fixed to the ends of the first spring 802 and the second spring 803.

[0022] During the drilling operation, the drill bit 7 rotates with the mounting sleeve 801, which in turn rotates the first spring 802, the second spring 803, and the contact plate 804. The contact plate 804 ensures rotational stability. At the same time, during the movement of the drill bit 7, the first spring 802 and the second spring 803 generate vibration, thereby performing reciprocating motion. During rotary drilling, an axial force is applied to ensure the drilling effect.

[0023] According to the above implementation scheme, the directional component 9 includes a first directional sleeve 901, a second directional sleeve 902, a first half-screw 903, a second half-screw 904, a nut 905, a ball bearing 906, a fixing seat 907, a mounting seat 908, and a fixing screw 909. The first directional sleeve 901 is fixedly connected to the first half-screw 903, and the second directional sleeve 902 is fixedly connected to the second half-screw 904. The second directional sleeve 902 and the first directional sleeve 901 are sleeved on the outer shell 1. The first half-screw 903 and the second half-screw 904 form a complete threaded rod, and the nut 905 is connected to the threaded rod. The ball bearing 906 is installed inside the first directional sleeve 901 and the second directional sleeve 902. Two fixing seats 907 are respectively fixed to the lower ends of the first directional sleeve 901 and the second directional sleeve 902. A pin is installed through the fixing seat 907 and the mounting seat 908, and the pin is fixedly connected to the mounting seat 908 and rotatably connected to the fixing seat 907. The fixing screw 909 is threadedly connected to the fixing seat 907, and the end of the fixing screw 909 abuts against the pin.

[0024] When installing the directional assembly 9, the first directional sleeve 901 and the second directional sleeve 902 are mounted on the outer casing 1. The first half-screw 903 and the second half-screw 904 are combined to form a complete threaded rod. A nut 905 is installed on the threaded rod. The entire directional assembly 9 is rotated and adjusted according to the drilling direction. At the same time, the mounting seat 908 rotates on the fixed seat 907 via a pin, making the mounting seat 908 more suitable for the downhole installation location. Then, the mounting seat 908 is fixed, and the relative fixation between the mounting seat 908 and the fixed seat 907 is ensured by the fixing screw 909. Then, the directional assembly 9 can be used. During use, the screw drill bit can move along the inside of the two directional sleeves. The ball bearings 906 roll and provide support, providing directional guidance without affecting the normal movement of the drill bit, effectively preventing deviation.

[0025] It should be noted that the drill bit 7 is connected to the end of the drive shaft 6 via a hexagonal rod 10 and is used in conjunction with the vibration assembly 8. The vibration assembly 8 can prevent the drill bit 7 from falling off and can also generate vibration during drilling to make the drill bit 7 reciprocate, so that the drill bit 7 has axial action while rotating, which improves the drilling effect. The directional assembly 9 is installed on the outer shell 1 to guide the entire drill string and prevent it from deviating, thus ensuring the effectiveness of use. A first directional sleeve 901 and a second directional sleeve 902 are set. The screws on the two directional sleeves are joined together to form a complete threaded rod, which is used in conjunction with the nut 905 to facilitate installation and disassembly. The inner side of the directional sleeve is provided with ball bearings 906, which guide the drill string without affecting its movement. Through the fixed seat 907 and the mounting seat 908, the directional assembly 9 can be flexibly installed in a suitable position downhole, ensuring installation flexibility.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel screw drill bit, comprising a housing (1), wherein a bypass valve (2) is provided at the upper end of the housing (1), and a motor assembly (3) is provided at the upper end of the interior of the housing (1), wherein a universal joint (5) and a drive shaft (6) are installed inside the housing (1), and a drill bit (7) is connected to the end of the drive shaft (6), characterized in that: The drill bit (7) is provided with a vibration component (8), and the vibration component (8) is located inside the housing (1). The outer surface of the housing (1) is equipped with an orientation component (9).

2. The novel screw drill bit according to claim 1, characterized in that: The housing (1) is provided with an anti-drop block (4) inside, and a hexagonal rod (10) is fixed on the drill bit (7), and the hexagonal rod (10) is movably connected to the drive shaft (6).

3. The novel screw drill bit according to claim 2, characterized in that: The motor assembly (3) includes a stator and a rotor, the stator being fixed inside the housing (1) and the rotor being mounted inside the stator.

4. A novel screw drill bit according to claim 3, characterized in that: The vibration assembly (8) includes a mounting sleeve (801), a first spring (802), a second spring (803), and contact plates (804). The mounting sleeve (801) is fitted onto the drill bit (7) and is fixed to the drill bit (7) by countersunk bolts. The first spring (802) and the second spring (803) are mounted on the mounting sleeve (801). The two contact plates (804) are respectively fixed to the ends of the first spring (802) and the second spring (803).

5. A novel screw drill bit according to claim 4, characterized in that: The directional assembly (9) includes a first directional sleeve (901), a second directional sleeve (902), a first half-screw (903), a second half-screw (904), a nut (905), a ball bearing (906), a fixing seat (907), a mounting seat (908), and a fixing screw (909). The first directional sleeve (901) is fixedly connected to the first half-screw (903), and the second directional sleeve (902) is fixedly connected to the second half-screw (904). The second directional sleeve (902) and the first directional sleeve (901) are sleeved on the outer shell (1). The first half-screw (903) and the second half-screw (904) form a complete threaded rod. The nut (905) is connected to the threaded rod.

6. A novel screw drill bit according to claim 5, characterized in that: The ball bearing (906) is installed inside the first directional sleeve (901) and the second directional sleeve (902). The two fixing seats (907) are respectively fixed to the lower ends of the first directional sleeve (901) and the second directional sleeve (902). A pin is installed through the fixing seat (907) and the mounting seat (908), and the pin is fixedly connected to the mounting seat (908). The pin is rotatably connected to the fixing seat (907). The fixing screw (909) is threadedly connected to the fixing seat (907), and the end of the fixing screw (909) abuts against the pin.

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