High-strength drill bit for petroleum drilling

Abstract

The utility model relates to the field of petroleum drilling, in particular to a high-strength drill bit for petroleum drilling, and aims to solve the technical problems that when a drilling drill bit is used for petroleum drilling, the strength of a drill bit structure is poor, and the drill bit is easily clamped by broken stones; according to the technical scheme, the high-strength drill bit for petroleum drilling comprises a threaded drill column, a drill bit assembly, a connecting assembly, a bearing assembly, a mounting assembly and an auxiliary drill bit assembly. Through the drill bit main body formed by welding the mounting shaft, the bearing table and the connecting block, the integration degree of the device can be greatly improved, so that the strength of the main body structure of the device is improved, and a three-layer drilling structure formed by the first drilling disc, the second drilling disc and the threaded drilling column is utilized; according to the drilling bit for petroleum drilling, gravel in the soil can be fully smashed while efficient drilling is conducted on the soil, and the problems that when the drilling bit is used for petroleum drilling, the strength of the drilling bit structure is poor, and the drilling bit is prone to being clamped by the gravel are solved.

Description

Technical Field

[0001] The utility model belongs to the field of oil drilling, in particular to a high-strength drill bit for oil drilling. Background Art

[0002] An oil drilling drill bit is a tool used to drill underground rock formations in oil drilling. It is usually made of steel. The main components of the drill bit are the cutter teeth and the drill rod. The cutter teeth of the drill bit are usually made of cemented carbide, and the drill rod is used to connect the drill bit to the drilling rig.

[0003] When existing drilling bits are used for oil drilling, the drilling structure of the drill bit is often a single tooth structure. During the drilling process, the single tooth structure is sometimes blocked by stones in the soil, making it impossible to crush the stones and affecting the drilling efficiency of the device. In addition, the overall structure is often assembled and spliced ​​by multiple bolts. Although it is convenient for daily maintenance, the strength of the main structure is insufficient and it is often damaged after long-term use, which in turn affects the service life of the drill bit.

[0004] Therefore, in order to address the problems that the drilling structure of the above-mentioned drilling bit is relatively simple when used for oil drilling, it is easily obstructed by the gravel when drilling in soil containing gravel, and the overall stability of the drill bit structure is poor, and it is easily damaged and unusable after long-term use, a high-strength drill bit for oil drilling is developed. By adding a triple drilling structure, an integrated welding structure and a stone crushing structure to the oil drilling device, the strength of the overall structure of the device can be greatly improved, and the efficiency and effect of its drilling and perforation can be improved. Utility Model Content

[0005] In order to overcome the problem that the drill bit is not strong enough and is easily stuck by gravel when used for oil drilling.

[0006] The technical solution of the utility model is: a high-strength drill bit for oil drilling, comprising a threaded drill string, a drill bit assembly, a connecting assembly, a bearing assembly, a mounting assembly, and an auxiliary drill bit assembly. The mounting assembly is threadedly mounted on a drilling rig, a bearing assembly with a self-contained hole groove is welded to the lower end of the mounting assembly, an auxiliary drill bit assembly for crushing gravel is mounted on the inner wall of the bearing assembly, connecting assemblies in the shape of inclined claws are welded around the bearing assembly, a drill bit assembly with two groups of drilling structures is rotatably arranged in the connecting assembly, and a threaded drill string is welded to the lower end of the drill bit assembly.

[0007] Preferably, by combining the drill bit assembly with the auxiliary drill bit assembly, the stones in the soil can be fully crushed and the soil can be efficiently drilled to improve the well drilling effect of the device. By then using the welded mounting assembly, bearing assembly and connecting assembly, the degree of integration of the device can be greatly improved, thereby increasing the strength of the device and increasing its service life.

[0008] Preferably, the mounting assembly includes an external thread, a mounting shaft, and a mounting platform. The outer wall of the mounting shaft is provided with an external thread, and the lower end of the mounting shaft is fixedly connected to the mounting platform. The mounting shaft is in the shape of a truncated cone. When in use, the device can be quickly installed on the drilling rig through the mounting shaft with its own external thread, thereby facilitating the user to replace or maintain the drill bit and improving the convenience of using the device.

[0009] Preferably, the bearing assembly includes a bearing platform and a bearing groove. The bearing groove is provided at the lower end of the mounting platform, and the upper end of the bearing platform is welded to the lower end of the mounting platform. When in use, the support tube can be welded and positioned through the bearing groove on the bearing platform to improve the stability of the device.

[0010] Preferably, the connecting assembly includes a connecting block, a mounting block, and a mounting groove. The outer wall of the supporting platform is fixedly connected with connecting blocks evenly distributed around the supporting platform. The connecting block is in the shape of an inclined hook. The inclined surface of the connecting block is fixedly connected with the mounting block. The lower end of the mounting block is provided with a mounting groove. When in use, the four connecting blocks installed around the supporting platform by welding can ensure the stability of the device during use and adjust the angle of the drill bit to an inclined state to increase the contact area between the drill bit and the ground, thereby improving the efficiency and effect of the drill bit on ground drilling.

[0011] Preferably, the drill bit assembly includes a first drill disc, a connecting shaft, a spherical protrusion, a square protrusion, and a second drill disc. The connecting shaft is rotatably installed in the installation groove. The lower end of the connecting shaft is fixedly connected to the first drill disc. The outer wall of the first drill disc is fixedly connected to equidistantly distributed spherical protrusions. The lower end of the first drill disc is fixedly connected to the second drill disc. When in use, the first drill disc and the spherical protrusions can be used to break up stones in the soil to improve the ability of the device to drill wells.

[0012] Preferably, the outer wall of the second drill disc is fixed with equally spaced square protrusions, the lower end of the second drill disc is fixed with a threaded drill string, and the upper and lower outer walls of the first drill disc and the second drill disc are provided with tooth grooves equally spaced around one axis. When in use, the second drill disc can be used in conjunction with the square protrusions to crush the broken stones for the second time, so that the threaded drill string can drill holes in the soil.

[0013] Preferably, the auxiliary drill bit includes a support tube, a crushing block, a rotating shaft, a crushing groove, and a mud outlet hole. The support tube is fixedly connected to the bearing groove, and six mud outlet holes are opened around the outer wall of the support tube. The inner wall of the support tube is fixedly connected to the rotating shaft, and the outer wall of the rotating shaft is fixedly connected to the crushing blocks equidistantly distributed around the rotating shaft. The inner wall of the support tube is provided with six crushing grooves equidistantly distributed around the inner wall of the support tube. When in use, the crushing block is driven to rotate by the rotating shaft, and the crushing groove can be used to efficiently crush the gravel and soil and discharge them from the mud outlet hole, thereby improving the drilling ability of the device.

[0014] Beneficial effects of the utility model:

[0015] 1. The drill bit assembly and the auxiliary drill bit assembly form a three-group drilling structure, which can fully crush the rocks in the soil and perform efficient triple drilling of the soil. The drill bit body, which is welded together by the mounting assembly, the bearing assembly, and the connecting assembly, can greatly improve the integration of the device and the strength of its main structure, thereby extending its service life and improving the drilling effect and efficiency of the device.

[0016] 2. The device can be quickly installed on the drilling rig through the mounting shaft with external thread, making it easy for users to replace or maintain the drill bit;

[0017] 3. Through four connecting blocks welded and installed around the supporting platform, the stability of the device can be improved during use, and the angle of the drill bit can be adjusted to an inclined state to increase the contact area between the drill bit and the ground, thereby improving the efficiency and effect of the drill bit on ground drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic diagram of the three-dimensional structure of a high-strength drill bit for oil drilling according to the present utility model;

[0019] Figure 2 Shown is a schematic diagram of the three-dimensional structure of a high-strength drill bit for oil drilling according to the present invention;

[0020] Figure 3 Shown is a schematic diagram of the three-dimensional structure of the mounting assembly, bearing assembly and connecting assembly of a high-strength drill bit for oil drilling according to the present invention;

[0021] Figure 4 Shown is a schematic diagram of the exploded three-dimensional structure of a bearing assembly, a connecting assembly, and an auxiliary drill bit assembly of a high-strength drill bit for oil drilling according to the present invention;

[0022] Figure 5 Shown is a schematic diagram of the three-dimensional structure of a drill bit assembly of a high-strength drill bit for oil drilling according to the present invention.

[0023] Explanation of the accompanying drawings: 101-first drill disc, 102-connecting shaft, 103-spherical protrusion, 104-square protrusion, 105-second drill disc, 201-connecting block, 202-mounting block, 203-mounting groove, 301-bearing platform, 302-bearing groove, 401-external thread, 402-mounting shaft, 403-mounting platform, 501-support cylinder, 502-crushing block, 503-rotating shaft, 504-crushing groove, 505-mud outlet hole, 6-threaded drill string. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] See also Figure 1-2 The utility model provides an embodiment: a high-strength drill bit for oil drilling, comprising a threaded drill string 6, a drill bit assembly, a connecting assembly, a bearing assembly, a mounting assembly, and an auxiliary drill bit assembly. The mounting assembly is threadedly mounted on a drilling machine, and a bearing assembly with a self-contained hole groove is welded at the lower end of the mounting assembly. An auxiliary drill bit assembly for crushing gravel is mounted on the inner wall of the bearing assembly. A connecting assembly in the shape of an inclined hook is welded around the bearing assembly. A drill bit assembly with two sets of drilling structures is rotatably arranged in the connecting assembly, and a threaded drill string 6 is welded at the lower end of the drill bit assembly. By cooperating with the auxiliary drill bit assembly, the stones in the soil can be fully crushed and the soil can be efficiently drilled, so as to improve the drilling effect of the device. By utilizing the welded mounting assembly, bearing assembly and connecting assembly, the degree of integration of the device can be greatly improved, thereby improving the strength of the device and prolonging its service life.

[0026] See also Figure 3-4In this embodiment, the mounting assembly includes an external thread 401, a mounting shaft 402, and a mounting platform 403. The outer wall of the mounting shaft 402 is provided with an external thread 401. The lower end of the mounting shaft 402 is fixedly connected to the mounting platform 403. The mounting shaft 402 is in the shape of a truncated cone. When in use, the device can be quickly installed on the drilling machine through the mounting shaft 402 with its own external thread 401, thereby facilitating the user to replace or maintain the drill bit and improving the convenience of using the device. The bearing assembly includes a bearing platform 301, a bearing slot 302, a mounting platform 403, and a mounting slot 303. 03 is provided with a bearing groove 302 at the lower end, and the upper end of the bearing platform 301 is welded to the lower end of the mounting platform 403. When in use, the support cylinder 501 can be welded and positioned through the bearing groove 302 on the bearing platform 301 to improve the stability of the device. The connecting assembly includes a connecting block 201, a mounting block 202, and a mounting groove 203. The outer wall of the bearing platform 301 is fixedly connected with connecting blocks 201 distributed equidistantly around the bearing platform 301. The connecting blocks 201 are in the shape of an inclined hook. The inclined surface of the connecting block 201 is fixedly connected with the mounting block 202. The lower end of the mounting block 202 is provided with a mounting groove 203. When in use, the connecting blocks 201 mounted around the bearing platform 301 by four weldings can simultaneously stabilize the device when in use and adjust the angle of the drill bit to an inclined shape to increase the contact area between the drill bit and the ground, thereby improving the efficiency and effect of the drill bit in ground drilling. The auxiliary drill bit includes a support tube 501, a crushing block 502, a rotating shaft 503, a crushing groove 504, and a mud outlet hole 505. The support tube 501 is fixed in the bearing groove 302, and the outer wall of the support tube 501 is penetrated all around. Six mud outlet holes 505 are provided, a rotating shaft 503 is fixedly connected to the inner wall of the support tube 501, and crushing blocks 502 equidistantly distributed around the rotating shaft 503 are fixedly connected to the outer wall of the rotating shaft 503. The inner wall of the support tube 501 is provided with six crushing grooves 504 equidistantly distributed around the inner wall of the support tube 501. When in use, the crushing blocks 502 are driven to rotate by the rotating shaft 503, and the crushing grooves 504 can be used to efficiently crush gravel and soil, and discharge them from the mud outlet holes 505 to the outside, thereby improving the well drilling ability of the device.

[0027] See also Figure 5In this embodiment, the drill bit assembly includes a first drill disc 101, a connecting shaft 102, a spherical protrusion 103, a square protrusion 104, and a second drill disc 105. The connecting shaft 102 is rotatably installed in the installation groove 203. The lower end of the connecting shaft 102 is fixedly connected to the first drill disc 101. The outer wall of the first drill disc 101 is fixedly connected to the spherical protrusions 103 distributed at equal intervals. The lower end of the first drill disc 101 is fixedly connected to the second drill disc 105. When in use, the first drill disc 101 cooperates with the spherical protrusions 103 to In order to break up the stones in the soil and improve the ability of the device to drill wells, the outer wall of the second drill disc 105 is fixed with equidistantly distributed square protrusions 104, and the lower end of the second drill disc 105 is fixed with a threaded drill string 6. The upper and lower outer walls of the first drill disc 101 and the second drill disc 105 are both provided with tooth grooves equidistantly distributed around one axis. When in use, the second drill disc 105 cooperates with the square protrusions 104 to perform secondary crushing on the broken stones, so that the threaded drill string 6 can drill holes in the soil.

[0028] During operation, first, the mounting shaft 402 is threadedly mounted on the drilling rig via the external thread 401, and the drilling rig is started, which drives the supporting platform 301 to rotate at high speed, thereby rotating the four inclined connecting blocks 201.

[0029] Next, the connecting block 201 drives the first drill disc 101 and the second drill disc 105 to cooperate with the spherical protrusions 103 and the square protrusions 104 to drill the soil at an inclined angle, and the second threaded drill string 6 drills the soil, while the rotating spherical protrusions 103 and the square protrusions 104 can break up the gravel in the soil;

[0030] Then, the rotating supporting platform 301 can also enable the rotating shaft 503 to drive the crushing block 502 to cooperate with the crushing groove 504 to fully crush the gravel and discharge it outward through the mud discharge hole 505.

[0031] Through the above steps, the drill bit body formed by welding the mounting shaft 402, the supporting platform 301 and the connecting block 201 can greatly improve the degree of integration of the device, thereby improving the strength of its main structure. Then, by utilizing the three-layer drilling structure composed of the first drill disc 101, the second drill disc 105 and the threaded drill string 6, the soil can be efficiently drilled and the gravel in the soil can be fully crushed, thereby solving the problem that the drill bit structure is not strong enough and is easily stuck by gravel when used for oil drilling.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.

Claims

1. A high-strength drill bit for oil drilling, comprising a threaded drill string (6), characterized in that: It also includes a drill bit assembly, a connection assembly, a bearing assembly, a mounting assembly, and an auxiliary drill bit assembly. The mounting assembly is threadedly mounted on the drilling machine. A bearing assembly with a self-contained hole groove is welded to the lower end of the mounting assembly. An auxiliary drill bit assembly for crushing gravel is mounted on the inner wall of the bearing assembly. A connection assembly in the shape of an inclined hook is welded around the bearing assembly. A drill bit assembly with two sets of drilling structures is rotatably arranged in the connection assembly. A threaded drill column (6) is welded to the lower end of the drill bit assembly.

2. A high-strength drill bit for oil drilling according to claim 1, characterized in that: The mounting assembly comprises an external thread (401), a mounting shaft (402), and a mounting platform (403); the external thread (401) is formed on the outer wall of the mounting shaft (402); the mounting platform (403) is fixedly connected to the lower end of the mounting shaft (402); and the mounting shaft (402) is in a truncated cone shape.

3. A high-strength drill bit for oil drilling according to claim 2, characterized in that: The bearing assembly comprises a bearing platform (301) and a bearing groove (302); the bearing groove (302) is provided at the lower end of the mounting platform (403); and the upper end of the bearing platform (301) is welded to the lower end of the mounting platform (403).

4. A high-strength drill bit for oil drilling according to claim 3, characterized in that: The connection assembly comprises a connection block (201), a mounting block (202), and a mounting groove (203); the outer wall of the bearing platform (301) is fixedly connected with the connection blocks (201) which are evenly distributed around the bearing platform (301); the connection blocks (201) are in the shape of inclined hooks; the inclined surface of the connection block (201) is fixedly connected with the mounting block (202); and the lower end of the mounting block (202) is provided with a mounting groove (203).

5. A high-strength drill bit for oil drilling according to claim 4, characterized in that: The drill head assembly comprises a first drill disc (101), a connecting shaft (102), a spherical protrusion (103), a square protrusion (104), and a second drill disc (105); the connecting shaft (102) is rotatably mounted in a mounting groove (203); the first drill disc (101) is fixedly connected to the lower end of the connecting shaft (102); the spherical protrusions (103) are evenly distributed and fixedly connected to the outer wall of the first drill disc (101); and the second drill disc (105) is fixedly connected to the lower end of the first drill disc (101).

6. A high-strength drill bit for oil drilling according to claim 5, characterized in that: The outer wall of the second drill disc (105) is fixedly connected with square protrusions (104) distributed at equal intervals, the lower end of the second drill disc (105) is fixedly connected with a threaded drill column (6), and the upper and lower outer walls of the first drill disc (101) and the second drill disc (105) are both provided with tooth grooves distributed at equal intervals around one axis thereof.

7. A high-strength drill bit for oil drilling according to claim 6, characterized in that: The auxiliary drill bit comprises a support tube (501), a crushing block (502), a rotating shaft (503), a crushing groove (504), and a mud outlet hole (505); the support tube (501) is fixedly connected inside the bearing groove (302); six mud outlet holes (505) are provided through the outer wall of the support tube (501); the rotating shaft (503) is fixedly connected to the inner wall of the support tube (501); the crushing blocks (502) are fixedly connected to the outer wall of the rotating shaft (503) and are equidistantly distributed around the rotating shaft (503); and the inner wall of the support tube (501) is provided with six crushing grooves (504) equidistantly distributed around the inner wall of the support tube (501).

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