A screw drill for deep well drilling

Abstract

The utility model relates to a kind of screw drill for deep well drilling applied to the field of deep well drilling, including screw drill body, the upper end of screw drill body is fixedly connected with installation cylinder, the inner wall of installation cylinder is fixedly connected with mounting plate and limiting component, the rear end of mounting plate is fixedly connected with motor, the inner wall of installation cylinder is also rotationally connected with mounting rod, adjusting wheel is fixedly covered on the outer surface of mounting rod, the output end of mounting rod and motor is commonly covered with belt pulley group, limiting component includes two limiting rings below adjusting wheel, when screw drill body occurs to adhere to drill pipe, intermittent axial impact is exerted on screw drill body using knocking rod, the contact state of screw drill body and well wall and mud cake is converted from static friction to kinetic friction, so as to remove jam, realize downhole autonomous fast unjamming, and then effectively reduce the economic loss and miswork time consumption caused by shutdown processing.

Description

Technical Field

[0001] This utility model relates to a screw drill bit, and more particularly to a screw drill bit for use in deep well drilling. Background Technology

[0002] Deep well drilling is mainly used in two aspects: one is in petroleum geological exploration, drilling for oil and gas reservoirs in deep strata, or drilling for standard strata in oilfield geology; the other is deep drilling for crustal structure science for national or international collaborative earth science research programs, in which screw drills are used.

[0003] The specification of Chinese Patent Publication No. CN219472041U discloses a screw drill bit. This utility model designs a screw drill bit that, when the drill bit is subjected to irregular impact vibration, the impact force and vibration are transmitted upward through the drill bit. The slider and the chuck slide back and forth, causing the spring to continuously extend and retract to reduce vibration. This ensures that the internal parts of the screw drill bit will not be damaged by severe vibration, thereby increasing its service life and reducing enterprise costs.

[0004] During the drilling process, existing screw drills are prone to getting mud cake stuck to the wellbore, forming a strong bond that can lead to stuck drill accidents. When a stuck drill accident occurs, the drill bit becomes stuck in the wellbore and cannot move, causing significant economic losses and wasted time. If not handled promptly, it can lead to wellbore failure and cause great disruption to construction operations. Utility Model Content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by this utility model is that the drill bit is prone to jamming during drilling using screw drill bits. After the jamming occurs, it is generally necessary to stop work and remove the drill bit for treatment, which causes great economic losses and time delays, and greatly interferes with the construction operation.

[0006] To address the aforementioned problems, this utility model provides a screw drill bit for deep well drilling, comprising a screw drill bit body, an installation cylinder fixedly connected to the upper end of the screw drill bit body, an installation plate and a limiting assembly fixedly connected to the inner wall of the installation cylinder, a motor fixedly connected to the rear end of the installation plate, an installation rod rotatably connected to the inner wall of the installation cylinder, an adjusting wheel fixedly sleeved on the outer surface of the installation rod, and a pulley set jointly sleeved on the installation rod and the output end of the motor. The limiting assembly includes two limiting rings located below the adjusting wheel, and multiple limiting rings are jointly fixedly connected to the outer surfaces of the two limiting rings. A limiting plate is fixedly connected to the inner wall of the mounting cylinder on its outer surface. A compression spring is fixedly connected to the lower end of the upper limiting ring, and a striking rod is provided at the upper end of the upper limiting ring. The lower end of the striking rod moves through one limiting ring, the compression spring, and another limiting ring in sequence. A sliding plate is fixedly fitted on the outer surface of the striking rod. The upper end of the sliding plate is fixedly connected to the upper end of the compression spring. An adjusting seat is rotatably connected to the upper end of the striking rod. An adjusting rod is fixedly connected to the upper end of the adjusting seat. A positioning rod is rotatably passed through the upper end of the adjusting rod. The rear end of the positioning rod is fixedly connected to the front end of the adjusting wheel.

[0007] In the aforementioned screw drill bit used for deep well drilling, when the screw drill bit body becomes stuck due to adhesion, the striking rod is used to apply intermittent axial impact to the screw drill bit body, changing the contact state between the screw drill bit body and the well wall and mud cake from static friction to dynamic friction, thereby releasing the jamming and realizing autonomous and rapid unblocking downhole, thus effectively reducing the economic losses and downtime caused by downtime treatment.

[0008] As a further improvement of this application, multiple limiting plates are arranged in a ring array around the limiting ring, the limiting plates are U-shaped, and the outer surface of the sliding plate slides in contact with the inner wall of the limiting plate.

[0009] As a further improvement to this application, a gap is left between the rear end of the adjusting rod and the front end of the mounting rod, and the diameter of the adjusting wheel is smaller than the distance between the upper and lower inner walls of the limiting plate.

[0010] As another improvement of this application, the outer surface of the striking rod is in contact with the inner wall of the limiting ring, and the lower end of the longitudinal section of the striking rod is trapezoidal.

[0011] As a further improvement to this application, the positioning rod is located at the edge of the front end of the adjusting wheel. When the positioning rod is at the bottom of the adjusting wheel, the lower end of the striking rod contacts the upper end of the screw drill body.

[0012] As another improvement of this application, a torque sensor is fixedly embedded inside the outer shell of the screw drill body, and both the motor and the torque sensor are connected to an external controller signal.

[0013] In summary, when a stuck drill bit occurs, the motor can be started to rotate. Under the action of the pulley assembly, the mounting rod drives the adjusting wheel to rotate, changing the position of the positioning rod. This, in turn, changes the position of the adjusting rod, causing the striking rod to move upward. Under the action of the two limit rings, the striking rod is forced to move axially. As the adjusting wheel rotates, when the positioning rod is at its lowest point, the lower end of the striking rod contacts the upper end of the screw drill bit, thus striking the upper end of the screw drill bit. The adjusting wheel rotates multiple times, driving the striking rod to reciprocate, thereby striking the screw drill bit multiple times. This changes the contact state between the screw drill bit and the well wall and mud cake from static friction to dynamic friction, thus releasing the stuck drill bit and achieving autonomous and rapid unsticking downhole. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the first embodiment of this application;

[0015] Figure 2 This is a cross-sectional view of the mounting cylinder structure according to the first embodiment of this application;

[0016] Figure 3 This is a schematic diagram of the adjusting wheel structure according to the first embodiment of this application;

[0017] Figure 4 This is a schematic diagram of the pulley assembly structure according to the first embodiment of this application;

[0018] Figure 5 This is a schematic diagram of the limiting component structure according to the first embodiment of this application;

[0019] Figure 6 This is a schematic diagram of the movement of the striking rod according to the first embodiment of this application;

[0020] Figure 7 This is a cross-sectional view of the structure of the second embodiment of this application.

[0021] Explanation of the labels in the diagram:

[0022] 1. Screw drill body, 2. Mounting cylinder, 3. Motor, 4. Mounting rod, 5. Adjusting wheel, 6. Pulley assembly, 7. Limiting ring, 8. Limiting plate, 9. Compression spring, 10. Striking rod, 11. Slide plate, 12. Adjusting seat, 13. Adjusting rod, 14. Positioning rod, 15. Torque sensor. Detailed Implementation

[0023] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0024] First implementation method:

[0025] Figures 1-4The diagram shows a screw drill bit for deep well drilling, comprising a screw drill bit body 1, an mounting cylinder 2 fixedly connected to the upper end of the screw drill bit body 1, an mounting plate and a limiting assembly fixedly connected to the inner wall of the mounting cylinder 2, the limiting assembly being located below the mounting plate, the mounting cylinder 2 protecting its internal parts, and a motor 3 fixedly connected to the rear end of the mounting plate. Those skilled in the art can select a suitable model of motor 3 according to actual needs, for example: Y2-63M1-2-0.18KW. The motor 3 provides initial rotational power. The inner wall of the mounting cylinder 2 is also rotatably connected to... Mounting rod 4, with adjusting wheel 5 fixedly fitted on its outer surface. Adjusting wheel 5 can convert rotational motion into reciprocating motion. Mounting rod 4 and the output end of motor 3 are fitted with pulley set 6. Depending on the usage requirements, pulley set 6 can also be replaced with high-temperature resistant metal chain drive. Pulley set 6 can drive mounting rod 4 and adjusting wheel 5 to rotate. There is a gap between the rear end of adjusting rod 13 and the front end of mounting rod 4. When the position of adjusting rod 13 changes, mounting rod 4 does not contact adjusting rod 13, thereby effectively preventing mounting rod 4 from obstructing the rotation of adjusting rod 13.

[0026] Figures 2-5 The diagram shows that the limiting assembly includes two limiting rings 7 located below the adjusting wheel 5. The limiting rings 7 can limit the striking rod 10, forcing the striking rod 10 to move only axially. Multiple limiting plates 8 are fixedly connected to the outer surfaces of the two limiting rings 7. The outer surfaces of the limiting plates 8 are fixedly connected to the inner wall of the mounting cylinder 2. The multiple limiting plates 8 are arranged in a ring array around the limiting rings 7, and the limiting plates 8 are U-shaped. A compression spring 9 is fixedly connected to the lower end of the upper limiting ring 7, and the striking rod 10 is located at the upper end of the upper limiting ring 7. The compression spring 9 can store energy and release it when the striking rod 10 moves downwards, accelerating the striking rod 10 and effectively increasing the striking force. The outer surface of the striking rod 10 is in contact with the inner wall of the limiting ring 7, and the lower end of the longitudinal section of the striking rod 10 is trapezoidal. The lower end of the striking rod 10 moves sequentially through... A limiting ring 7, a compression spring 9, and another limiting ring 7 are inserted. A sliding plate 11 is fixedly fitted on the outer surface of the striking rod 10. The outer surface of the sliding plate 11 slides in contact with the inner wall of the limiting plate 8. The upper end of the sliding plate 11 is fixedly connected to the upper end of the compression spring 9. When the striking rod 10 moves axially, the sliding plate 11 also moves accordingly, causing the compression spring 9 to deform. An adjusting seat 12 is rotatably connected to the upper end of the striking rod 10. The upper end of the adjusting seat 12 is fixedly connected to the adjusting rod 13. The diameter of the adjusting wheel 5 is smaller than the distance between the upper and lower inner walls of the limiting plate 8. A positioning rod 14 is rotatably inserted through the upper end of the adjusting rod 13. The adjusting seat 12, the adjusting rod 13, and the positioning rod 14 form a hinge mechanism, which converts the contour movement of the adjusting wheel 5 into a vertical impact. The rear end of the positioning rod 14 is fixedly connected to the front end of the adjusting wheel 5.

[0027] Figure 6As shown: the positioning rod 14 is located at the edge of the front end of the adjusting wheel 5, so that the positioning rod 14 rotates with the rotation of the adjusting wheel 5, causing the position of the adjusting rod 13 to change, causing the striking rod 10 to move upward. Under the action of the two limiting rings 7, the striking rod 10 is forced to move axially. At this time, the sliding plate 11 moves with the movement of the striking rod 10, and the compression spring 9 also deforms accordingly, thereby limiting the striking rod 10. As the adjusting wheel 5 rotates, when the positioning rod 14 is at the bottom of the adjusting wheel 5, the lower end of the striking rod 10 contacts the upper end of the screw drill body 1, thereby striking the screw drill body 1.

[0028] In use, if the screw drill body 1 becomes stuck, the motor 3 can be started to rotate. Under the action of the pulley group 6, the mounting rod 4 drives the adjusting wheel 5 to rotate, causing the position of the positioning rod 14 to change, which in turn causes the position of the adjusting rod 13 to change, causing the striking rod 10 to move upward. Under the action of the two limit rings 7, the striking rod 10 is forced to move axially. At this time, the sliding plate 11 moves with the movement of the striking rod 10, and the compression spring 9 also deforms accordingly, thereby affecting the striking rod. The 10 is limited, and as the adjusting wheel 5 rotates, when the positioning rod 14 is at its lowest position, the lower end of the striking rod 10 contacts the upper end of the screw drill body 1, thereby striking the upper end of the screw drill body 1. The adjusting wheel 5 rotates multiple times, driving the striking rod 10 to reciprocate, thereby striking the screw drill body 1 multiple times, changing the contact state between the screw drill body 1 and the well wall and mud cake from static friction to dynamic friction, thereby accelerating the release speed of the jam and realizing the autonomous and rapid unjamming downhole.

[0029] Second implementation method:

[0030] This embodiment adds a torque sensor 15 to the first embodiment, while the rest remains the same as the first embodiment.

[0031] Figure 7 As shown: A torque sensor 15 is fixedly embedded inside the outer shell of the screw drill body 1. Those skilled in the art can select a suitable model of torque sensor 15 according to actual needs, such as TQ-664F2. Both the motor 3 and the torque sensor 15 are connected to an external controller. Those skilled in the art can select a suitable model of controller according to actual needs, such as OHR-B300A-A. The controller has a torque calculation formula printed inside, which is convenient for calculating the torque change rate. The calculation method of the torque change rate is existing technology and will not be described in detail here.

[0032] The torque sensor 15 monitors the screw drill body 1 in real time. When the drill gets stuck, the torque suddenly increases. The external controller starts the motor 3, which causes the striking rod 10 to move and strike the screw drill body 1. The external controller can calculate the torque change rate to determine the level of the stuck drill, adjust the speed of the motor 3, and thus adjust the striking speed.

[0033] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A screw drill for deep well drilling, comprising a screw drill body (1), characterized in that: The upper end of the screw drill body (1) is fixedly connected to the mounting cylinder (2), the inner wall of the mounting cylinder (2) is fixedly connected to the mounting plate and the limiting component, the rear end of the mounting plate is fixedly connected to the motor (3), the inner wall of the mounting cylinder (2) is also rotatably connected to the mounting rod (4), the outer surface of the mounting rod (4) is fixedly fitted with the adjusting wheel (5), and the output end of the mounting rod (4) and the motor (3) are jointly fitted with the pulley group (6); The limiting assembly includes two limiting rings (7) located below the adjusting wheel (5). Multiple limiting plates (8) are fixedly connected to the outer surfaces of the two limiting rings (7). The outer surfaces of the limiting plates (8) are fixedly connected to the inner wall of the mounting cylinder (2). A compression spring (9) is fixedly connected to the lower end of the upper limiting ring (7), and a striking rod (10) is provided at the upper end of the upper limiting ring (7). The lower end of the striking rod (10) sequentially moves through one limiting ring (7) and the compression spring (9). The striking rod (10) is fitted with a sliding plate (11) on its outer surface. The upper end of the sliding plate (11) is fixedly connected to the upper end of the compression spring (9). The upper end of the striking rod (10) is rotatably connected to an adjusting seat (12). The upper end of the adjusting seat (12) is fixedly connected to an adjusting rod (13). The upper end of the adjusting rod (13) is rotatably connected to a positioning rod (14). The rear end of the positioning rod (14) is fixedly connected to the front end of the adjusting wheel (5).

2. A screw drill for deep well drilling as claimed in claim 1, wherein: Multiple limiting plates (8) are arranged in a ring array around the limiting ring (7). The limiting plates (8) are U-shaped, and the outer surface of the sliding plate (11) slides in contact with the inner wall of the limiting plate (8).

3. A screw pump for use in deep well drilling according to claim 2, characterized in that: There is a gap between the rear end of the adjusting rod (13) and the front end of the mounting rod (4), and the diameter of the adjusting wheel (5) is smaller than the distance between the upper and lower inner walls of the limiting plate (8).

4. A screw pump for use in deep well drilling according to claim 1, characterized in that: The outer surface of the striking rod (10) is in contact with the inner wall of the limiting ring (7), and the lower end of the longitudinal section of the striking rod (10) is trapezoidal.

5. A screw pump for use in deep well drilling according to claim 4, characterized in that: The positioning rod (14) is located at the edge of the front end of the adjusting wheel (5). When the positioning rod (14) is located at the bottom of the adjusting wheel (5), the lower end of the striking rod (10) contacts the upper end of the screw drill body (1).

6. A screw pump for use in deep well drilling as claimed in claim 1, wherein: A torque sensor (15) is fixedly embedded inside the outer shell of the screw drill body (1), and both the motor (3) and the torque sensor (15) are connected to an external controller.

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