Drill rod and drill bit connecting structure for petroleum drilling

Abstract

The utility model provides a drill rod and drill bit connecting structure for petroleum drilling, which comprises a drill rod body and a drill bit body, the drill bit body is arranged at the bottom of the drill rod body, a cavity is arranged at the bottom of the drill rod body, jacks are arranged on the surface of the drill bit body, a connecting component is arranged in an inner cavity of the cavity, and the connecting component is connected with the drill bit body. The connecting assembly comprises a hard spring, the hard spring is fixedly connected to the top of an inner cavity of the cavity, the other end of the hard spring is fixedly connected with a guide block, and mounting blocks are fixedly mounted on the periphery of the guide block. The assembly work of the drill rod body and the drill bit body is achieved, meanwhile, after the drill bit body is used for a long time and the surface is abraded, the drill bit body can be rapidly replaced, the convenience and efficiency of assembly of the drill rod body and the drill bit body are improved, and an operator can use the drill rod body and the drill bit body conveniently.

Description

Technical Field

[0001] This utility model relates to a drill pipe and drill bit connection structure for oil drilling, belonging to the technical field of connection structure technology. Background Technology

[0002] Drill pipe is a threaded steel tube used to connect the drilling rig's surface equipment to the drilling equipment or bottom hole assembly located at the bottom of the well. Its purpose is to transport drilling mud to the drill bit and, together with the drill bit, raise, lower, or rotate the bottom hole assembly. Drill pipe must be able to withstand enormous internal and external pressures, torsion, bending, and vibration. In the oil and gas extraction and refining process, drill pipe can be reused multiple times.

[0003] Chinese Patent Publication No. (CN 215949385 U) discloses a connection structure between a drill rod body and a drill bit, including a drill bit, a rod body, and a pin. The drill bit has a connecting pin at one end away from the working face. The outer circumferential surface of the connecting pin has a first pin hole radially provided. One end of the rod body has a connecting groove. The outer circumferential surface of the connecting groove has a second pin hole radially provided to cooperate with the first pin hole. The outer circumferential surface of the connecting pin is connected to the inner wall of the connecting groove by a thermal interference fit. The pin passes through the second pin hole and the first pin hole in sequence.

[0004] The aforementioned device connects the drill rod and drill bit by means of a pin hole and a pin. However, since the two are fixed by welding, when the drill bit needs to be replaced due to surface wear after long-term use, it is not easy to disconnect the drill rod and drill bit. This results in replacing the drill bit taking a lot of time and cost, and is inconvenient for operators to use.

[0005] Therefore, a drill pipe and drill bit connection structure for oil drilling is proposed. Utility Model Content

[0006] In view of this, the present invention provides a drill pipe and drill bit connection structure for oil drilling to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0007] The technical solution of this utility model is implemented as follows: A drill pipe and drill bit connection structure for oil drilling includes a drill pipe body and a drill bit body. The drill bit body is located at the bottom of the drill pipe body. A cavity is formed at the bottom of the drill pipe body. Insertion holes are formed on the surface of the drill bit body. A connecting assembly is provided in the inner cavity of the cavity. The connecting assembly includes a rigid spring. The rigid spring is fixedly connected to the top of the inner cavity. A guide block is fixedly connected to the other end of the rigid spring. Mounting blocks are fixedly installed around the guide block. Connecting rods are movably connected to the surfaces of the six mounting blocks. Moving blocks are movably connected to the other ends of the six connecting rods. Bolts are fixedly installed on the outer sides of the six moving blocks. Anti-loosening nuts are threaded onto the surfaces of the six bolts.

[0008] More preferably, a guide rod is fixedly installed at the top of the inner cavity of the cavity, and the guide block is slidably connected to the surface of the guide rod.

[0009] More preferably, slide rods are fixedly installed around the perimeter of the cavity, and the six movable blocks are slidably connected to the surfaces of the six slide rods.

[0010] More preferably, slots are provided around the perimeter of the cavity, the inner cavities of the six slots are all in the same horizontal direction as the inner cavities of the six cavities, and the six bolts are all slidably connected in the inner cavities of the six slots.

[0011] More preferably, the inner cavities of the six slots are all interconnected with the inner cavities of the six lumens, and the six bolts all penetrate the inner cavities of the six slots and the six lumens and extend to the outside of the drill bit body.

[0012] More preferably, the drill pipe body and the drill bit body are made of the same material, and both the drill pipe body and the drill bit body are made of high-hardness steel.

[0013] More preferably, both the drill rod body and the drill bit body are coated with a reinforcing layer, and the reinforcing layer is made of a metal-based nano-coating.

[0014] More preferably, a flange is fixedly installed on the top of the drill pipe body, and the surface of the flange is provided with threaded grooves.

[0015] The present invention has the following advantages due to the adoption of the above technical solution:

[0016] I. This utility model, by setting up a connecting component, uses the tension of a hard spring to cause the moving block to drive the bolt to move outward. At this time, the bolt thread is connected to the anti-loosening nut, which can firmly install the drill bit body on the surface of the drill bit body, realizing the assembly of the drill rod body and the drill bit body. At the same time, after the surface of the drill bit body wears down after long-term use, the drill bit body can be quickly replaced, improving the convenience and efficiency of assembling the drill rod body and the drill bit body, and making it easier for operators to use.

[0017] II. This utility model, by setting a guide rod, can limit the movement of the guide block to prevent it from deviating during movement, thus affecting the assembly of the drill bit body and drill rod body. By setting a sliding rod, the movement of the moving block can be limited to prevent it from deviating during movement, thus affecting the assembly effect of the drill rod body and drill bit body. By setting a slot, the movement of the bolt can be limited to prevent it from changing direction during movement, thus affecting the connection between the drill rod body and drill bit body. By setting a reinforcing layer, due to the characteristics of its material, it can strengthen the drill rod body and drill bit body, improving the corrosion resistance and wear resistance of the drill rod body and drill bit body. By setting a flange and threaded groove, it can facilitate the quick connection of the drill rod body to external drilling equipment, improving the convenience of the overall equipment installation.

[0018] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional front view structural diagram of the present invention;

[0021] Figure 2 For the present utility model Figure 1 Enlarged structural diagram at point A;

[0022] Figure 3 This is a schematic diagram of the disassembly structure of the drill bit body of this utility model;

[0023] Figure 4 This is a schematic diagram of the slot structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the connection component structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of the drill bit body and drill rod body of this utility model.

[0026] Reference numerals: 1. Drill pipe body; 2. Connecting assembly; 201. Hard spring; 202. Guide block; 203. Mounting block; 204. Connecting rod; 205. Moving block; 206. Bolt; 207. Anti-loosening nut; 208. Guide rod; 209. Slide rod; 210. Slot; 3. Drill bit body; 4. Insertion hole; 5. Cavity; 6. Reinforcing layer; 7. Flange; 8. Threaded groove. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0028] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] Example 1

[0030] like Figure 1-5 As shown, this utility model embodiment provides a drill pipe and drill bit connection structure for oil drilling, including a drill pipe body 1 and a drill bit body 3. The drill bit body 3 is located at the bottom of the drill pipe body 1. A cavity 5 is formed at the bottom of the drill pipe body 1. Insertion holes 4 are formed on the surface of the drill bit body 3. A connecting assembly 2 is provided in the inner cavity of the cavity 5. The connecting assembly 2 includes a rigid spring 201, which is fixedly connected to the top of the inner cavity of the cavity 5. A guide block 202 is fixedly connected to the other end of the rigid spring 201. Mounting blocks 203 are fixedly installed around the guide blocks 202. A connecting rod 204 is movably connected to the surface of each of the six mounting blocks 203. A moving block 205 is movably connected to the other end of each of the six connecting rods 204. A fixedly installed outer side of each of the six moving blocks 205 is fixedly installed. Bolts 206, all six bolts 206 are threaded with anti-loosening nuts 207. A guide rod 208 is fixedly installed on the top of the inner cavity of the cavity 5. A guide block 202 is slidably connected to the surface of the guide rod 208. Slide rods 209 are fixedly installed around the inner cavity of the cavity 5. Six moving blocks 205 are slidably connected to the surface of the six slide rods 209. Slots 210 are provided around the inner cavity of the cavity 5. The inner cavities of the six slots 210 and the inner cavities of the six cavities 5 are all in the same horizontal direction. Six bolts 206 are slidably connected in the inner cavities of the six slots 210. The inner cavities of the six slots 210 and the inner cavities of the six cavities 5 are interconnected. The six bolts 206 penetrate the six slots 210 and the inner cavities of the six cavities 5 and extend to the outside of the drill bit body 3.

[0031] By setting up the connecting component 2, under the influence of the tension of the hard spring 201, the moving block 205 drives the bolt 206 to move outward. At this time, the bolt 206 is threadedly connected to the anti-loosening nut 207, which can firmly install the drill bit body 3 onto the surface of the drill bit body 3, realizing the assembly of the drill rod body 1 and the drill bit body 3. At the same time, after the surface of the drill bit body 3 wears down after long-term use, the drill bit body 3 can be quickly replaced, improving the convenience and efficiency of assembling the drill rod body 1 and the drill bit body 3, and making it easier for operators to use. The guide rod 208 can limit the movement of the guide block 202 to prevent it from deviating during movement, which would affect the assembly of the drill bit body 3 and the drill rod body 1. The slide rod 209 can limit the movement of the moving block 205 to prevent it from deviating during movement, which would affect the assembly of the drill rod body 1 and the drill bit body 3. The slot 210 can limit the movement of the bolt 206 to prevent it from changing direction during movement, which would affect the connection of the drill rod body 1 and the drill bit body 3.

[0032] Example 2

[0033] like Figure 1 and Figure 6 As shown, in one embodiment, the drill rod body 1 and the drill bit body 3 are made of the same material. Both the drill rod body 1 and the drill bit body 3 are made of high-hardness steel. The surfaces of both the drill rod body 1 and the drill bit body 3 are coated with a reinforcing layer 6, and the reinforcing layer 6 is made of a metal-based nano-coating. A flange 7 is fixedly installed on the top of the drill rod body 1, and the surface of the flange 7 is provided with threaded grooves 8.

[0034] By setting up the reinforcing layer 6, due to the characteristics of its material, it can strengthen the drill rod body 1 and the drill bit body 3, improving their corrosion resistance and wear resistance. By setting up the flange 7 and the threaded groove 8, the drill rod body 1 can be quickly connected to external drilling equipment, improving the overall ease of equipment installation.

[0035] In operation, when the drill bit body 3 needs to be replaced, the anti-loosening nut 207 is turned to dislodge it from the surface of the bolt 206. Then, the bolt 206 is squeezed, causing the moving block 205 to move inward. The movement of the moving block 205 causes the connecting rod 204 to swing and pushes the guide block 202 downward. At this time, the hard spring 201 deforms due to the movement of the guide block 202. Then, the new drill bit body 3 is re-attached to the bottom of the drill rod body 1, and then the pressure on the bolt 206 is released. At this time, the rigid spring 201 deforms again due to the disappearance of force. The rigid spring 201 pulls the guide block 202 and the mounting block 203 to move upward. The connecting rod 204 swings due to the change in the position of the mounting block 203 and pushes the moving block 205 and the bolt 206 to move outward. The bolt 206 passes through the slot 210 and the inner cavity of the cavity 5 and extends to the outside of the drill bit body 3. Then, the anti-loosening nut 207 is threaded to the surface of the bolt 206, thereby completing the assembly of the drill rod body 1 and the drill bit body 3.

[0036] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A drill pipe bit connection structure for oil drilling, comprising a drill pipe body (1) and a bit body (3), characterized in that, The drill bit body (3) is located at the bottom of the drill rod body (1), the bottom of the drill rod body (1) is provided with a cavity (5), the surface of the drill bit body (3) is provided with a jack (4), the inner cavity of the cavity (5) is provided with a connecting assembly (2), the connecting assembly (2) comprises a hard spring (201), the hard spring (201) is fixedly connected to the top of the inner cavity of the cavity (5), the other end of the hard spring (201) is fixedly connected with a guide block (202), the periphery of the guide block (202) is fixedly installed with a mounting block (203), the surface of the six mounting blocks (203) is movably connected with a connecting rod (204), the other end of the six connecting rods (204) is movably connected with a moving block (205), the outer side of the six moving blocks (205) is fixedly installed with a bolt (206), the surface of the six bolts (206) is threadedly connected with an anti-loosening nut (207).

2. A drill pipe and drill bit connection for oil drilling as set forth in claim 1, characterized in that: The top of the inner cavity of the cavity (5) is fixedly installed with a guide rod (208), and the guide block (202) is slidably connected to the surface of the guide rod (208).

3. A drill pipe and drill bit connection for oil drilling as set forth in claim 1, wherein: The periphery of the inner cavity of the cavity (5) is fixedly installed with a sliding rod (209), and the surface of the six moving blocks (205) is slidably connected with the six sliding rods (209).

4. The tool joint of claim 1 wherein: The periphery of the inner cavity of the cavity (5) is provided with a slot (210), and the inner cavities of the six slots (210) and the inner cavities of the six cavities (5) are in the same horizontal direction.

5. A drill pipe and drill bit connection for oil drilling as defined in claim 4, characterized in that: The inner cavities of the six slots (210) and the inner cavities of the six cavities (5) are in communication with each other, and the six bolts (206) penetrate the inner cavities of the six slots (210) and the inner cavities of the six cavities (5) and extend to the outer side of the drill bit body (3).

6. A drill pipe and drill bit connection for oil drilling as defined in claim 1, wherein: The materials of the drill rod body (1) and the drill bit body (3) are consistent with each other, and the materials of the drill rod body (1) and the drill bit body (3) are high-hardness steel materials.

7. A drill pipe and drill bit connection for oil drilling as defined in claim 1, wherein: The surfaces of the drill rod body (1) and the drill bit body (3) are coated with a reinforcing layer (6), and the material of the reinforcing layer (6) is a metal-based nano coating.

8. A drill pipe and drill bit connection for oil drilling as defined in claim 1, wherein: The top of the drill rod body (1) is fixedly installed with a flange plate (7), and the surface of the flange plate (7) is provided with a screw groove (8).

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