Expandable drill bit for petroleum drilling

Abstract

The utility model relates to the field of drill bits, in particular to an expandable drill bit for petroleum drilling. According to the expandable drill bit for petroleum drilling, expansion adjustment can be carried out on the drill bit, the diameter of the drill bit is enlarged, the expandable drill bit can adapt to use requirements in different scenes conveniently, and the flexibility of using the expandable drill bit is improved. An expandable drill bit for petroleum drilling comprises a drill bit body, a connecting ring, a central column and the like, the connecting ring is connected to the right portion of the drill bit body, and the central column is connected to the drill bit body. A second connecting rod moves leftwards along a central column, so that a rotating rod rotates, an expansion block is rotationally opened, then a third connecting rod moves leftwards along the central column, the rotating rod rotates, the expansion block is rotationally opened, expansion adjustment can be conducted on a drill bit, and the diameter of the drill bit is increased; the use requirements in different scenes can be met conveniently, and the flexibility of using the device is improved.

Description

Technical Field

[0001] The utility model relates to the field of drill bits, in particular to an expandable drill bit for oil drilling. Background Art

[0002] Oil drilling refers to the process of drilling wells underground to find and extract oil and natural gas resources. The drill bit is a key tool used to break rocks in oil drilling. It is in direct contact with the formation and cuts or breaks rocks through rotation and pressure to form a wellbore. The type and design of the drill bit depends on the specific conditions of drilling, such as rock type, drilling depth and drilling method.

[0003] Existing oil drilling drill bits are usually clamped on a driving device, and then the driving device is started to rotate the drill bit for use. During the use of the drill bit, the drill bit cannot be expanded, and it is inconvenient to increase the diameter of the drill bit. Drill bits of different specifications need to be replaced for use, which is inconvenient to adapt to the use requirements in different scenarios, resulting in reduced flexibility in the use of the equipment.

[0004] Therefore, it is necessary to design an expandable drill bit for oil drilling that can adjust the drill bit for expansion, enlarge the diameter of the drill bit, adapt to the use requirements in different scenarios, and improve the flexibility of using the device. Utility Model Content

[0005] In order to overcome the disadvantages that the drill bit cannot be expanded during use, and drill bits of different specifications need to be replaced for use, which is inconvenient to adapt to the use requirements in different scenarios and leads to reduced flexibility in the use of the equipment, the utility model provides an expandable drill bit for oil drilling that can adjust the drill bit for expansion, enlarge the diameter of the drill bit, facilitate adapting to the use requirements in different scenarios, and improve the flexibility of using the device.

[0006] The technical scheme of the utility model is: an expandable drill bit for oil drilling, comprising a drill bit, a connecting ring, a center column, a first connecting rod and a first rack, the right part of the drill bit is connected with the connecting ring, the drill bit is connected with the center column, the right part of the center column is slidably connected with the first connecting rod, and the right side of the first connecting rod is connected with the first rack.

[0007] Furthermore, the drill bit is made of high-speed steel and has high hardness and wear resistance.

[0008] Furthermore, it also includes a second connecting rod and a rotating rod. A plurality of second connecting rods are connected to the left side of the first connecting rod. The second connecting rods are all slidably connected to the central column. The outer side of the left part of the second connecting rod is rotatably connected to the rotating rod.

[0009] Furthermore, it also includes an expansion block, a sleeve, a second rack and a third connecting rod. The outer side of the first connecting rod is slidably connected to the sleeve, and multiple third connecting rods are connected to the left side of the sleeve. The third connecting rods are all slidably connected to the center column. The outer side of the left part of the third connecting rod is also rotatably connected to a rotating rod. The rotating rod is rotatably connected to an expansion block, and the expansion blocks are in contact with the connecting ring. The right side of the sleeve is connected to the second rack.

[0010] Furthermore, it also includes an outer tube, a sleeve and a stabilizing frame. The outer side of the second rack is slidably connected to the stabilizing frame, the outer tube is connected to the stabilizing frame, the expansion blocks are in contact with the outer tube, and the outer side of the outer tube is connected to the sleeve through threads.

[0011] Furthermore, the stabilizing frame is cross-shaped.

[0012] Beneficial effects: 1. The utility model moves the second connecting rod to the left along the center column, so that the rotating rod rotates, and then the expansion block rotates and opens, and then the third connecting rod moves to the left along the center column, so that the rotating rod rotates, and then the expansion block rotates and opens, so that the drill bit can be expanded and adjusted to expand the diameter of the drill bit, which is convenient to adapt to the use requirements in different scenarios and improve the flexibility of using the device.

[0013] 2. The utility model moves the third connecting rod to the right, so that the rotating rod rotates to rotate and retract the expansion block, and then the first rack moves to the right, thereby moving the second connecting rod to the right, so that the rotating rod rotates to rotate and retract the expansion block, and then the sleeve is rotated to move the sleeve to the left, thereby protecting the expansion block and preventing the expansion block from being exposed and worn when not in use, thereby extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of the utility model.

[0016] Figure 3 It is a partial three-dimensional structural schematic diagram of the utility model.

[0017] In the accompanying drawings: 1-drill bit, 2-connecting ring, 3-center column, 4-first connecting rod, 5-first rack, 6-second connecting rod, 7-rotating rod, 8-expansion block, 9-casing, 10-second rack, 11-third connecting rod, 12-outer cylinder, 13-sleeve, 14-stabilizing frame. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0019] An expandable drill bit for oil drilling, such as Figure 1-Figure 3 As shown, it includes a drill bit 1, a connecting ring 2, a center column 3, a first connecting rod 4 and a first rack 5, a second connecting rod 6, a rotating rod 7, an expansion block 8, a sleeve 9, a second rack 10, a third connecting rod 11, an outer cylinder 12, a sleeve 13 and a stabilizing frame 14. The drill bit 1 is made of high-speed steel and has high hardness and wear resistance. The right part of the drill bit 1 is connected to the connecting ring 2, the drill bit 1 is connected to the center column 3, the right part of the center column 3 is slidably connected to the first connecting rod 4, the right side of the first connecting rod 4 is connected to the first rack 5, the left side of the first connecting rod 4 is connected to four second connecting rods 6, the second connecting rods 6 are all slidably connected to the center column 3, and the second connecting rods 6 are connected to the left side of the center column 3. The outer side of the first connecting rod 4 is slidably connected to a sleeve 9, four third connecting rods 11 are connected to the left side of the sleeve 9, and the third connecting rods 11 are slidably connected to the center column 3. The outer side of the left part of the third connecting rod 11 is also rotatably connected to the rotating rod 7, and the rotating rod 7 is rotatably connected to the expansion block 8, and the expansion block 8 is in contact with the connecting ring 2. A second rack 10 is connected to the right side of the sleeve 9, and a stabilizing frame 14 is slidably connected to the outer side of the second rack 10. The stabilizing frame 14 is cross-shaped, and an outer cylinder 12 is connected to the stabilizing frame 14. The expansion blocks 8 are in contact with the outer cylinder 12, and the outer side of the outer cylinder 12 is connected to the sleeve 13 through a thread.

[0020] When the drill bit 1 is needed for oil drilling, the device can be used. The device is installed on the driving device so that the outer cylinder 12 is clamped with the driving device. The drill bit 1 is made of high-speed steel and has high hardness and wear resistance. The device is then brought to the place where oil drilling is needed. The sleeve 13 is then turned by hand, and the sleeve 13 moves to the right under the action of the thread. The driving device is then started so that the gear on the driving device engages with the first rack 5 to move to the left, thereby driving the second connecting rod 6 to move to the left along the center column 3, causing the rotating rod 7 to rotate, thereby causing the expansion block 8 to rotate and open to contact the connecting ring 2. The gear on the driving device engages with the second rack 10 to move to the left, thereby causing the second rack 10 to move to the left, thereby driving the third connecting rod 11 to move to the left along the center column 3, causing the rotating rod 7 to rotate, thereby causing the expansion block 8 to rotate and open, thereby enabling the drill bit to be adjusted. 1 is used for expansion adjustment to expand the diameter of the drill bit 1, so as to adapt to the use requirements in different scenarios and improve the flexibility of using the device. Then, the driving device is started to drive the drill bit 1 to rotate for use. After use, the driving device is turned off, and the gear on the driving device is rotated in the opposite direction. The gear and the second rack 10 are meshed with each other, so that the second rack 10 moves to the right, the third connecting rod 11 moves to the right, the rotating rod 7 rotates, and the expansion block 8 is rotated and retracted. Then, the gear and the first rack 5 are meshed with each other, so that the first rack 5 moves to the right, and the second connecting rod 6 moves to the right, the rotating rod 7 rotates, and the expansion block 8 is rotated and retracted. Then, the sleeve 13 is rotated by hand, and the sleeve 13 is moved to the left under the action of the thread, so that the expansion block 8 can be protected to prevent the expansion block 8 from being exposed and worn when not in use, thereby extending the service life of the device.

[0021] The above is a detailed introduction to the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An expandable drill bit for oil drilling, characterized in that: The drill bit (1) comprises a drill bit (1), a connecting ring (2), a center column (3), a first connecting rod (4) and a first rack (5); the right part of the drill bit (1) is connected to the connecting ring (2); the drill bit (1) is connected to the center column (3); the right part of the center column (3) is slidably connected to the first connecting rod (4); and the right side of the first connecting rod (4) is connected to the first rack (5).

2. An expandable drill bit for oil drilling as claimed in claim 1, characterized in that: The drill bit (1) is made of high-speed steel and has high hardness and wear resistance.

3. An expandable drill bit for oil drilling as claimed in claim 2, characterized in that: It also includes a second connecting rod (6) and a rotating rod (7); a plurality of second connecting rods (6) are connected to the left side of the first connecting rod (4); the second connecting rods (6) are all slidably connected to the central column (3); and the outer side of the left part of the second connecting rod (6) is rotatably connected to the rotating rod (7).

4. An expandable drill bit for oil drilling as claimed in claim 3, characterized in that: It also includes an expansion block (8), a sleeve (9), a second rack (10) and a third connecting rod (11); the first connecting rod (4) is slidably connected to the outer side of the sleeve (9); a plurality of third connecting rods (11) are connected to the left side of the sleeve (9); the third connecting rods (11) are all slidably connected to the central column (3); the outer side of the left part of the third connecting rod (11) is also rotatably connected to a rotating rod (7); the rotating rod (7) is rotatably connected to an expansion block (8); the expansion block (8) is in contact with the connecting ring (2); and the right side of the sleeve (9) is connected to the second rack (10).

5. An expandable drill bit for oil drilling as claimed in claim 4, characterized in that: It also includes an outer cylinder (12), a sleeve (13) and a stabilizing frame (14); the outer side of the second rack (10) is slidably connected to the stabilizing frame (14); the stabilizing frame (14) is connected to the outer cylinder (12); the expansion blocks (8) are in contact with the outer cylinder (12); and the outer side of the outer cylinder (12) is connected to the sleeve (13) via a thread.

6. An expandable drill bit for oil drilling as claimed in claim 5, characterized in that: The stabilizing frame (14) is cross-shaped.

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