Oil exploitation drilling tool

Abstract

The utility model relates to an oil exploitation drilling tool. The drilling tool comprises a drill body, three evenly-distributed cones, a PDC cutting structure and a plurality of auxiliary assemblies. The tooth wheel is composed of a tooth column and three layers of tooth palms, and coarse and fine layered crushing is carried out step by step, so that the drilling efficiency is improved. The PDC cutting structure is arranged at the end of the drill body and comprises a triangular prism, a column groove, a main blade, an auxiliary blade and a side blade, large-diameter PDC cutting parts are arranged on the main blade and the auxiliary blade, PDC cutting parts with the diameters gradually reduced are arranged on the side blade, the cutting effect is optimized, and the adaptability of the drilling tool in a hard rock stratum is enhanced. The adaptability of the drilling tool in soft and hard rock stratums is further improved through the small blades and the small-diameter PDC cutting pieces on the rectangular plate, and it is ensured that the drilling tool works stably and efficiently. The overall design effectively reduces the abrasion of the drilling tool, prolongs the service life, improves the drilling efficiency, and reduces the mining cost. The drilling tool is suitable for rock stratums with different hardness and has a wide application prospect in oil exploitation.

Description

Technical Field

[0001] This utility model relates to an oil extraction drilling tool, and more particularly to a roller cone drilling tool, especially an oil extraction drilling tool with a PDC cutting structure. Background Technology

[0002] In oil extraction, the performance of drilling tools directly affects extraction efficiency and cost. Traditional drilling tools often suffer from rapid tool wear and poor cutting performance, especially in the extraction of hard rock formations, where their cutting capabilities are particularly insufficient. Therefore, a more structurally sound drilling tool with higher cutting efficiency is needed to improve the efficiency and reliability of oil extraction. Utility Model Content

[0003] The purpose of this invention is to provide an oil drilling tool that can effectively solve the above-mentioned problems.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] The system includes a drill body and three roller cones, evenly distributed around the end of the drill body. A PDC cutting structure is provided between the roller cones. The PDC cutting structure includes a triangular prism located at the end of the drill body, with a groove in the prism. The upper edge of the prism forms a main cutting wing, and the upper edge of the groove forms a secondary cutting wing. Large-diameter PDC cutting parts are provided on both the main cutting wing and the secondary cutting wing.

[0006] Furthermore: the side of the groove forms a side blade, and the side blade is provided with a PDC cutting element with a gradually decreasing diameter.

[0007] Furthermore: the flange of the main blade is an arc edge, and the flange of the secondary blade is a straight edge.

[0008] Furthermore, the drill body is also provided with a rectangular plate, the upper end of which forms a small blade, and a small-diameter PDC cutting part is provided on the small blade.

[0009] Furthermore, the number of rectangular plates is three, and the sides of the rectangular plates correspond to the apex of the triangular prism.

[0010] Furthermore: the toothed wheel includes a toothed column, the upper end of which is provided with a first toothed palm, and a plurality of square pyramidal teeth are evenly distributed around the outer circumference of the first toothed palm; a second toothed palm is integrally formed at the upper end of the first toothed palm, and a plurality of conical teeth are evenly distributed around the outer circumference of the second toothed palm; a third toothed palm is integrally formed at the upper end of the second toothed palm, and a plurality of arc-shaped teeth are evenly distributed around the outer circumference of the third toothed palm.

[0011] Furthermore, the first, second, and third tooth palms are all disc-shaped, and the diameters of the first, second, and third tooth palms gradually decrease.

[0012] The beneficial effects are:

[0013] This invention, by adopting a PDC cutting structure and roller cone design, can effectively improve the cutting ability of drill bits, extend their service life, and increase oil extraction efficiency.

[0014] The configuration of PDC cutting components, especially the design of the main cutter blade, secondary cutter blade, and side cutter blade, enables the drill bit to work better in various rock formations, and is particularly suitable for drilling in hard rock formations.

[0015] The multi-stage tooth design enhances the drill bit's wear resistance, improves stability, and reduces drill bit wear and replacement frequency.

[0016] The small cutter blade configuration further enhances the stability and cutting effect of the drill string during drilling, while reducing the burden on the drill string. Attached Figure Description

[0017] For ease of explanation, this utility model is described in detail below with reference to the specific embodiments and accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a top view of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] The following is a layout of the parts and their corresponding designations, with the designation first:

[0022] 1. Drill body; 2. Roller cone; 21. Roller column; 22. First tooth palm; 23. Quadrilateral pyramidal tooth; 24. Second tooth palm; 25. Conical tooth; 26. Third tooth palm; 27. Arc-shaped tooth; 3. PDC cutting structure; 4. Triangular prism; 5. Column groove; 6. Main cutter wing; 7. Secondary cutter wing; 8. Large-diameter PDC cutting part; 9. Side cutter wing; 10. PDC cutting part; 11. Rectangular plate; 12. Small cutter wing; 13. Small-diameter PDC cutting part. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms “first,” “second,” “third,” etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0026] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] See Figure 1 , Figure 2 This is one embodiment of an oil extraction drilling tool according to the present invention.

[0028] This embodiment of the oil extraction drilling tool includes a drill body 1, three roller cones 2, a PDC cutting structure 3, and a series of auxiliary components. The drilling tool is designed to improve drilling efficiency in hard rock formations, while reducing drill bit wear and extending its service life. The drilling tool mainly consists of the drill body, roller cones, PDC cutting structure, rectangular plate, and roller cone structure, with a reasonable design and clear functional allocation.

[0029] Drill Body 1: Drill Body 1 is the core component of the entire drilling tool. It bears all cutting structures and drives the drill bit to perform drilling operations through rotation and downward pressure. Three roller cones 2 are fixed at the front end of Drill Body 1, evenly distributed to form an equilateral triangle. Drill Body 1 is typically made of high-strength alloy material to ensure stability under high temperature, high pressure, and intense friction environments.

[0030] Roller cone 2 and its structure: Roller cone 2 is the rock-breaking component of the drill bit, which directly contacts the underground rock formation and undertakes the cutting action. In this embodiment, the structure of roller cone 2 consists of a roller post 21, a first toothed end 22, a second toothed end 24, and a third toothed end 26.

[0031] Column 21: The core supporting part of the roller cone 2, which supports the entire roller cone. The upper end of column 21 is connected to the drill body 1 by welding or other fixing methods to ensure a firm connection between the roller cone and the drill body 1.

[0032] First Tooth Palm 22: The top of the tooth pillar 21 connects to the first tooth palm 22. Several square pyramidal teeth 23 are evenly distributed around the outer periphery of the first tooth palm 22. These square pyramidal teeth 23 play a role in the initial crushing of the rock strata. During the operation, these cone-shaped teeth will first come into contact with the rock and quickly carry out coarse crushing.

[0033] Second tooth 24: The upper end of the first tooth 22 is integrally formed with the second tooth 24, and several conical teeth 25 are also evenly distributed on the outer periphery of the second tooth 24. The conical teeth 25 can penetrate deeper into the rock strata and effectively crush the rock as the drill bit continues to press down.

[0034] Third Tooth 26: The upper end of the second tooth 24 is integrally formed with a third tooth 26, and several arc-shaped teeth 27 are evenly distributed on the outer periphery of the third tooth 26. The design of the arc-shaped teeth 27 can further break the rock strata and effectively prevent the drill bit from slipping during operation.

[0035] The design of these teeth allows the drill bit to break up rock layers layer by layer during drilling, gradually reducing the rock from coarse to fine, ensuring the stability of the drill bit and its long-term effective operation.

[0036] The PDC cutting structure 3, with the introduction of the PDC cutting device, gives this drill bit excellent hardness and wear resistance. The PDC cutting structure 3 consists of a triangular prism 4, a column groove 5, a main cutter wing 6, a secondary cutter wing 7, and a side cutter wing 9, etc. It is mainly located at the end of the drill body 1 and installed between the roller cones 2, which further enhances the cutting ability of the drill bit.

[0037] Triangular prism 4: Located at the end of drill body 1, triangular prism 4 is shaped like a triangular prism. The surface of the prism is specially treated to ensure good contact with hard rock formations, thereby improving the cutting efficiency of the drill bit. The upper edge of triangular prism 4 forms the main cutter wing 6 and the secondary cutter wing 7. The edge of the main cutter wing 6 is curved, while the edge of the secondary cutter wing 7 is straight. This shape design helps optimize the cutting angle and improve the cutting efficiency of the drill bit.

[0038] Post groove 5: Post groove 5 is located in the middle of the triangular prism 4, mainly used to optimize the cutting effect of the drill bit. The upper edge of post groove 5 forms a secondary blade 7, which is designed to assist cutting and ensure smoother rock cutting.

[0039] Large-diameter PDC cutting elements 8 and 10: PDC cutting elements are installed on the surfaces of the main blade 6, secondary blade 7, and side blade 9. Large-diameter PDC cutting elements 8 are installed on the main blade 6 and secondary blade 7; these cutting elements are responsible for roughing and main cutting. PDC cutting elements 10 with gradually decreasing diameters are installed on the side blade 9. The design of the side blades helps the drill bit better adapt to the hardness variations of different rock formations and provides a uniform cutting load.

[0040] Side blades 9: Located on both sides of the column groove 5, the main function of the side blades 9 is to assist the main blades 6 and secondary blades 7 in completing the cutting work on the rock. In terms of design, the shape of the side blades 9 gradually narrows from the bottom to the top, ensuring a more stable cutting process and reducing the impact force during cutting.

[0041] Rectangular plates 11 and small blades 12: Three rectangular plates 11 are also provided on the drill body 1, and a small blade 12 is formed at the upper end of each rectangular plate 11. The small blades 12 are used to further improve the drill bit's cutting ability in soft rock formations during drilling. Each small blade 12 is equipped with a small-diameter PDC cutting element 13. These small-diameter PDC cutting elements 13 are mainly used to improve drilling efficiency and reduce the resistance of the drill bit when contacting softer rock formations, thus maintaining a stable drilling state.

[0042] The working principle of this device is as follows:

[0043] In actual drilling operations, the drill bit advances through rotation and downward pressure. When the drill bit rotates, the roller cone 2 begins to contact the underground rock strata, and the four-sided pyramidal tooth 23 first performs coarse crushing, initially cutting the rock. As the drill bit further presses down, the second tooth 24 and the third tooth 26 begin to work, further crushing the rock strata through the conical tooth 25 and the arc-shaped tooth 27, respectively.

[0044] Simultaneously, the main blade 6, secondary blade 7, and side blade 9 of the PDC cutting structure 3 begin to operate. The large-diameter PDC cutting elements 8 on the main blade 6 and secondary blade 7 achieve higher cutting efficiency in high-hardness rock formations, while the side blade 9 helps maintain the stability of the drill bit and reduces fluctuations in lateral cutting loads.

[0045] The small blades 12 on the rectangular plate 11 help provide additional cutting action during the drilling process, especially when drilling rock formations with uneven hardness, which can improve the adaptability of the drill and ensure the continuous stability of the drilling speed.

[0046] The actual effects obtained by using this device are as follows:

[0047] Improve drilling efficiency: Through reasonable roller cone design and PDC cutting parts, this drill bit can maintain a high drilling speed in hard rock formations, significantly reducing drilling time.

[0048] Reduced drill bit wear: The high hardness of PDC cutting parts ensures that the drill bit can maintain its cutting performance during long-term high-load operation, reducing wear and thus extending the service life of the drill bit.

[0049] High adaptability: Whether in hard or soft rock formations, this drilling tool can quickly adapt to different drilling environments, ensuring good drilling results and stability.

[0050] Reduce drilling costs: By reducing the frequency of drill string changes and improving drilling efficiency, this drill string can effectively reduce the overall cost of oil extraction.

[0051] The oil drilling tool of this embodiment, with its advanced design concept and efficient cutting structure, can significantly improve the efficiency of oil extraction, reduce drill wear, extend service life, adapt to different types of rock formations, and has broad application prospects.

[0052] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An oil extraction drilling tool, characterized in that: The drill body (1) and roller cones (2) are included. There are three roller cones (2) evenly distributed around the end of the drill body (1). A PDC cutting structure (3) is provided between the roller cones (2). The PDC cutting structure (3) includes a triangular prism (4) provided at the end of the drill body (1). A groove (5) is provided in the triangular prism (4). The upper edge of the triangular prism (4) forms a main blade (6). The upper edge of the groove (5) forms a secondary blade (7). Large-diameter PDC cutting parts (8) are provided on both the main blade (6) and the secondary blade (7).

2. The oil extraction drilling tool according to claim 1, characterized in that: The side formed by the groove (5) constitutes a side blade (9), and a PDC cutting part (10) with a gradually decreasing diameter is provided on the side blade (9).

3. The oil extraction drilling tool according to claim 2, characterized in that: The main blade (6) has an arc edge, and the secondary blade (7) has a straight edge.

4. The oil extraction drilling tool according to claim 3, characterized in that: The drill body (1) is also provided with a rectangular plate (11), the upper end of which forms a small blade (12), and a small diameter PDC cutting part (13) is provided on the small blade (12).

5. The oil extraction drilling tool according to claim 4, characterized in that: There are three rectangular plates (11), and the side of the rectangular plate (11) corresponds to the tip of the triangular prism (4).

6. The oil extraction drilling tool according to claim 5, characterized in that: The toothed wheel (2) includes a toothed column (21), the upper end of which is provided with a first toothed palm (22), and the outer circumference of the first toothed palm (22) is evenly distributed with several square pyramidal teeth (23); the upper end of the first toothed palm (22) is integrally formed with a second toothed palm (24), the outer circumference of the second toothed palm (24) is evenly distributed with several conical teeth (25); the upper end of the second toothed palm (24) is integrally formed with a third toothed palm (26), the outer circumference of the third toothed palm (26) is evenly distributed with several arc-shaped teeth (27).

7. The oil extraction drilling tool according to claim 6, characterized in that: The first tooth palm (22), the second tooth palm (24), and the third tooth palm (26) are all disc-shaped, and the diameters of the first tooth palm (22), the second tooth palm (24), and the third tooth palm (26) gradually decrease.

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