Combined drill bit

Abstract

The utility model provides a combined drill bit, which relates to the technical field of drill bits, and comprises a drill rod, the top of the drill rod is provided with a caulking groove, the inner wall of the bottom of the caulking groove is provided with a cross-shaped groove, a cross-shaped piece is embedded in the cross-shaped groove, and a cylinder is embedded in the caulking groove and is in threaded connection with the caulking groove. According to the drill bit, the embedded column is embedded into the embedded groove, the cross-shaped piece can be embedded into the cross-shaped groove, meanwhile, the round rod can be embedded into the round hole, the effect of limiting the drill bit body can be achieved, and therefore the effect of preventing the drill bit body from rotating in the using process to enable the spiral connecting position to be loosened can be achieved; and a cylinder can be driven to rotate by rotating a rotating piece, the cylinder can be rotated to be embedded into an embedding groove, when the cylinder is completely embedded into the embedding groove, an embedding column can be extruded and fixed, the effect of conveniently installing and fixing the drill bit body can be achieved, and therefore the effect of conveniently replacing the drill bit body can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a combined drill bit. Background Art

[0002] The drill bit is one of the important tools for oil drilling. Whether the drill bit is suitable for the rock properties and its quality plays a very important role in the selection of drilling technology, especially in terms of drilling quality, drilling speed and drilling cost. PDC drill bit is a rock breaking tool widely used in the oil and gas exploration and development industry today. It effectively improves mechanical drilling tools and shortens the drilling cycle.

[0003] Existing, such as Chinese patent publication number CN104100204B, the present invention discloses a combined PDC drill bit, which belongs to the technical field of drill bits for drilling. The combined PDC drill bit of the present invention comprises a drill bit body (1), a gauge short section (2), and a conversion joint (3), and is characterized in that: one end of the drill bit body (1) is provided with a fixed blade (11), and the other end is provided with a connecting thread (13), and the gauge short section (2) is assembled between the fixed blade (11) and the connecting thread (13); the connecting thread (13) of the drill bit body (1) is screwed with the connecting thread (33) of the conversion joint (3), and the gauge short section (2) is fixed between the conversion joint (3) and the fixed blade (11). The drill bit of the present invention is a combined structure. After the drill bit gauge is worn, only the gauge short section needs to be replaced instead of the entire drill bit, which significantly reduces the use cost of the drill bit; the gauge short sections of different structures can be replaced according to the drilling conditions at the drilling site, which is conducive to improving drilling efficiency.

[0004] Although the above patented technology allows the replacement of different structures of gauge nipples according to drilling conditions at the drilling site, which is beneficial to improving drilling efficiency, the installation is carried out through spiral threads, and the spiral thread connection is prone to loosening during the rotation of the drill bit, which can easily cause the drill bit to fall off during use. Therefore, a combined drill bit is needed to solve the above problem. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the above patented technology that the spiral connection is easily loosened during the rotation of the drill bit, which easily leads to the drill bit falling off during use, and to propose a combined drill bit.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a combined drill bit, including a drill rod, a embedding groove is provided on the top of the drill rod, a cross groove is provided on the bottom inner wall of the embedding groove, a cross piece is embedded in the interior of the cross groove, a cylinder is embedded in the interior of the embedding groove and threadedly connected, an embedding column is provided in the interior of the cylinder, the bottom of the embedding column is fixedly connected to the cross piece, the top of the cylinder is fixedly connected to a rotating part, a support rod is passed through the center of the rotating part and is slidably connected, the bottom of the support rod is fixedly connected to the top of the embedding column, and the top of the support rod is fixedly connected to the drill bit body.

[0007] Preferably, a first circular hole is provided at the center of the bottom of the cross piece, and a second circular hole is provided at the bottom of the cross piece and near the four ends. A first round rod and a second round rod are embedded in the interior of the first circular hole and the second circular hole respectively, and the bottoms of the first round rod and the second round rod are fixedly connected to the bottom inner wall of the cross groove.

[0008] Preferably, a spiral groove is provided on the surface of the drill body.

[0009] Preferably, drilled fan blades are fixedly connected to the surface of the support rod at equal intervals near the top.

[0010] Preferably, the inner wall of the embedding groove is provided with a spiral pattern, the outer wall of the cylinder is provided with a spiral pattern, and the spiral patterns on the embedding groove and the cylinder are matched.

[0011] Preferably, bumps are fixedly connected to the surface of the rotating member at equal intervals, and the edges of the bumps are rounded.

[0012] Compared with the prior art, the advantages and positive effects of the present invention are:

[0013] 1. In the present invention, by embedding the embedded column into the embedded groove, the cross piece will be embedded into the cross groove, and the round rod will be embedded into the round hole, which can limit the drill body, thereby preventing the drill body from rotating during use and causing the spiral connection to loosen, thereby preventing the drill bit from detaching.

[0014] 2. In the present invention, the rotating member can be used to drive the cylinder to rotate, and the cylinder can be embedded in the embedded groove. When the cylinder is completely embedded in the embedded groove, the embedded column can be squeezed and fixed, which can facilitate the installation and fixation of the drill body, thereby facilitating the replacement of the drill body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of the overall structure of a combined drill bit proposed by the utility model;

[0016] Figure 2This is a cross-sectional view of the overall structure of a combined drill bit proposed by the utility model;

[0017] Figure 3 This is a partial structural cross-sectional view of a combined drill bit proposed by the utility model;

[0018] Figure 4 The utility model provides a cross-sectional view of the rotating part structure of a combined drill bit;

[0019] Figure 5 The present invention provides a three-dimensional diagram of the drill bit structure of a combined drill bit.

[0020] Legend: 1. Drill rod; 2. Embedded groove; 3. Cross groove; 4. Embedded column; 5. Cross piece; 6. First circular hole; 7. Second circular hole; 8. First round rod; 9. Second round rod; 10. Support rod; 11. Drill bit body; 12. Drilling blade; 13. Rotating part; 14. Cylinder; 15. Bump. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1, as Figure 1-5 As shown, the utility model provides a combined drill bit, including a drill rod 1, a embedding groove 2 is formed at the top of the drill rod 1, a cross groove 3 is formed on the inner wall of the bottom of the embedding groove 2, a cross piece 5 is embedded in the cross groove 3, a cylinder 14 is embedded in the embedding groove 2 and threadedly connected, an embedding column 4 is provided in the cylinder 14, the bottom of the embedding column 4 is fixedly connected to the cross piece 5, the top of the cylinder 14 is fixedly connected to a rotating member 13, a support rod 10 is passed through the center of the rotating member 13 and is slidably connected, the bottom of the support rod 10 is fixedly connected to the top of the embedding column 4, and the top of the support rod 10 is fixedly connected to the drill bit body 11.

[0024] The effect achieved by the entire embodiment 1 is that an embedding groove 2 is opened at the top of the drill rod 1, a cross groove 3 is opened on the bottom inner wall of the embedding groove 2, a cross piece 5 is embedded in the cross groove 3, a cylinder 14 is embedded in and threadedly connected to the interior of the embedding groove 2, an embedding column 4 is provided inside the cylinder 14, the bottom of the embedding column 4 is fixedly connected to the cross piece 5, the top of the cylinder 14 is fixedly connected to a rotating member 13, the center of the rotating member 13 passes through and is slidably connected to a support rod 10, the bottom of the support rod 10 is fixedly connected to the top of the embedding column 4, and the top of the support rod 10 is fixedly connected to the drill body 11, which can drive the cylinder 14 to rotate by rotating the rotating member 13, and the cylinder 14 can be embedded in the embedding groove 2 when it rotates. When the cylinder 14 is completely embedded in the embedding groove 2, the embedding column 4 can be squeezed and fixed, and at the same time, the cross piece 5 can prevent the embedding column 4 from rotating.

[0025] Example 2, as Figure 1-5 As shown, a first circular hole 6 is provided at the bottom center of the cross piece 5, and a second circular hole 7 is provided at the bottom of the cross piece 5 and near the four ends. The first circular hole 6 and the second circular hole 7 are respectively embedded with a first round rod 8 and a second round rod 9, and the bottoms of the first round rod 8 and the second round rod 9 are fixedly connected to the bottom inner wall of the cross groove 3; a spiral groove is provided on the surface of the drill body 11; a drilling fan blade 12 is fixedly connected to the surface of the support rod 10 at equal intervals near the top; a spiral pattern is provided on the inner wall of the embedding groove 2, and a spiral pattern is provided on the outer wall of the cylinder 14, and the spiral patterns on the embedding groove 2 and the cylinder 14 are adapted to each other; protrusions 15 are fixedly connected to the surface of the rotating member 13 at equal intervals, and the edges of the protrusions 15 are rounded.

[0026] The effect achieved by the entire embodiment 2 is that a first circular hole 6 is opened at the center of the bottom of the cross piece 5, and a second circular hole 7 is opened at the bottom of the cross piece 5 and near the four ends. The first circular hole 6 and the second circular hole 7 are respectively embedded with a first round rod 8 and a second round rod 9. The bottoms of the first round rod 8 and the second round rod 9 are fixedly connected to the bottom inner wall of the cross groove 3, which can make the first round rod 8 and the second round rod 9 more stable on the cross piece 5; a spiral groove is opened on the surface of the drill body 11, which can improve the drilling efficiency; a drilling fan blade 12 is fixedly connected to the surface of the support rod 10 at equal intervals near the top, which can increase the drilling diameter; a spiral pattern is opened on the inner wall of the embedding groove 2 and the outer wall of the cylinder 14, and the spiral patterns on the embedding groove 2 and the cylinder 14 are adapted to facilitate the installation of the cylinder 14; protrusions 15 are fixedly connected to the surface of the rotating member 13 at equal intervals, and the edges of the protrusions 15 are rounded, which can facilitate the rotation of the rotating member 13.

[0027] Working principle: By embedding the embedded column 4 into the embedded groove 2, the cross piece 5 will be embedded into the cross groove 3, and at the same time the first round rod 8 and the second round rod 9 will be embedded into the first circular hole 6 and the second circular hole 7, which can limit the embedded column 4, the support rod 10 and the drill body 11, and prevent the drill body 11 from rotating during use and causing the spiral connection to loosen. At this time, the rotating member 13 can drive the cylinder 14 to rotate, and the cylinder 14 can be embedded in the embedded groove 2 when it rotates. When the cylinder 14 is completely embedded in the embedded groove 2, the embedded column 4 can be squeezed and fixed, which can facilitate the installation and fixation of the drill body 11.

[0028] The wiring diagram of the drill body 11 in the present invention is common knowledge in the art, and its working principle is a well-known technology. The model is selected according to the actual use, so the control method and wiring arrangement of the drill body 11 are not explained in detail.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A combined drill bit, comprising a drill rod (1), characterized in that: The top of the drill rod (1) is provided with an embedding groove (2), the bottom inner wall of the embedding groove (2) is provided with a cross groove (3), a cross piece (5) is embedded in the interior of the cross groove (3), a cylinder (14) is embedded in the interior of the embedding groove (2) and is threadedly connected, an embedding column (4) is provided in the interior of the cylinder (14), the bottom of the embedding column (4) is fixedly connected to the cross piece (5), the top of the cylinder (14) is fixedly connected to a rotating piece (13), a support rod (10) is passed through the center of the rotating piece (13) and is slidably connected, the bottom of the support rod (10) is fixedly connected to the top of the embedding column (4), and the top of the support rod (10) is fixedly connected to a drill body (11).

2. A combined drill bit according to claim 1, characterized in that: A first circular hole (6) is provided at the center of the bottom of the cross member (5), and second circular holes (7) are provided at the bottom of the cross member (5) and near the four ends. A first round rod (8) and a second round rod (9) are embedded in the interior of the first round hole (6) and the second round hole (7), respectively. The bottoms of the first round rod (8) and the second round rod (9) are fixedly connected to the bottom inner wall of the cross slot (3).

3. The combined drill bit according to claim 1, characterized in that: The surface of the drill body (11) is provided with spiral grooves.

4. The combined drill bit according to claim 1, characterized in that: Drilled fan blades (12) are fixedly connected to the surface of the support rod (10) and near the top at equal intervals.

5. The combined drill bit according to claim 1, characterized in that: The inner wall of the embedding groove (2) is provided with a spiral pattern, and the outer wall of the cylinder (14) is provided with a spiral pattern, and the spiral patterns on the embedding groove (2) and the cylinder (14) are matched.

6. The combined drill bit according to claim 1, characterized in that: The surface of the rotating member (13) is fixedly connected with bumps (15) at equal intervals, and the edges of the bumps (15) are rounded.

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