PDC (Polycrystalline Diamond Compact) rotating device

Abstract

The invention provides a PDC (Polycrystalline Diamond Compact) rotating device. The PDC rotating device comprises a mounting seat, an adsorption unit; a rotating structure; and a PDC composite layer. According to the PDC rotating device, the mounting base is arranged, one end of the mounting base can be fixedly arranged on the drilling equipment, the other end of the mounting base extends out of the drilling equipment, and the included angle is formed between the extending direction and the drilling direction of the drilling equipment; an adsorption unit is arranged in an open mounting cylinder cavity formed in the mounting base along the central axis of the mounting base, a rotating structure is arranged in the mounting cylinder cavity, the rotating structure can be always located in the mounting cylinder cavity through the adsorption unit, one end of the rotating structure extends out of the mounting cylinder cavity, and a PDC composite layer is integrally connected to the extending end of the rotating structure. The PDC composite layer can cut rocks on the inner wall of the drill hole through the annular cutting surface collinear with the central axis of the mounting seat, and rotates under the friction of the rocks in the drill hole in the rotating process of the drilling equipment, so that the annular cutting surface is fully utilized.

Description

Technical Field

[0001] The invention belongs to the technical field of PDC composite sheets, and in particular relates to a PDC composite sheet rotating device. Background Art

[0002] PDC composite sheet is a new functional material made of diamond powder and cemented carbide substrate sintered under ultra-high pressure and high temperature conditions. It is widely used in cutting tools and wear-resistant tools. Diamond composite sheet (PDC for short) is a cutting unit made of diamond powder and cemented carbide substrate sintered under ultra-high pressure and high temperature. Its cutting surface is artificial diamond, which has high hardness, high wear resistance and impact resistance.

[0003] In the prior art, PDC composite plates are usually welded and fixed to drilling equipment. During drilling, only the outer blades of the diamond composite plate can cut rock, and the inner blades cannot contact the rock, resulting in that all the blades of the PDC composite plate cannot be fully utilized. The blades on the outer side of the PDC composite plate need to be replaced regularly after being worn. The utilization rate of the PDC composite plate is low, the replacement cost is high, and the utilization rate of the diamond composite plate is poor. Summary of the invention

[0004] The embodiment of the present invention provides a PDC composite sheet rotating device, which aims to solve the problems of low utilization rate and high replacement cost of existing PDC composite sheets.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a PDC composite sheet rotating device, comprising: The mounting seat is fixed on the drilling equipment, and the central axis is arranged at an angle with the drilling direction of the drilling equipment, and has an extended end extending out of the drilling equipment, and has an installation cylinder cavity with an open extended end; An adsorption unit is fixedly arranged in the installation cylinder cavity; A rotating structure, which is rotatably disposed in the installation cylinder cavity and corresponds to the adsorption unit, and one end of the rotating structure extends out of the installation cylinder cavity; The PDC composite layer is integrally connected to the protruding end of the rotating structure. The PDC composite layer has an annular cutting surface whose axis is colinear with the central axis of the mounting seat. The PDC composite layer is used to rotate due to the friction of the rock in the borehole as the drilling equipment rotates, so that the annular cutting surface can be fully utilized.

[0006] In a possible implementation, the rotating structure includes: A connecting shaft is slidably connected to the installation cylinder cavity and is rotationally connected to the installation cylinder cavity, one end of the connecting shaft abuts against the adsorption unit, and the other end extends out of the installation cylinder cavity; The mounting plate is connected to the extended end of the connecting shaft, and the connecting end of the mounting plate and the connecting shaft abuts against the top end of the mounting seat.

[0007] In a possible implementation manner, the connecting shaft and the mounting disk are integrally connected.

[0008] In a possible implementation, the connecting shaft and the mounting plate are both made of cemented carbide.

[0009] In a possible implementation, the adsorption unit is a neodymium iron boron strong magnet.

[0010] In a possible implementation, a through hole communicating with the mounting cylinder cavity is provided at the bottom end of the mounting seat, and the through hole is used to facilitate removal of the adsorption unit.

[0011] The PDC composite layer can be used to cut the rock on the inner wall of the borehole by a circular cutting surface that is colinear with the central axis of the mounting seat, and is rotated by the friction of the rock in the borehole during rotation of the drilling equipment, so that the annular cutting surface is fully utilized, thereby improving the utilization rate of the PDC composite sheet during cutting, reducing the replacement cost, and having good adaptability and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the structure of a PDC composite sheet rotating device provided in an embodiment of the present invention; Figure 2 A schematic cross-sectional view of a PDC composite sheet rotating device provided in an embodiment of the present invention; Figure 3 A schematic diagram of the installation structure of a PDC composite sheet rotating device provided in an embodiment of the present invention; Description of reference numerals: 10. Mounting seat; 20. Adsorption unit; 30. Rotating structure; 31. Connecting shaft; 32. Mounting plate; 40. PDC composite layer. DETAILED DESCRIPTION

[0013] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0014] Please also read Figures 1 to 3 The PDC composite sheet rotating device provided by the present invention is now described. The PDC composite sheet rotating device comprises a mounting seat 10, an adsorption unit 20, a rotating structure 30 and a PDC composite layer 40.

[0015] The mounting seat 10 is fixed on the drilling equipment, and the central axis is set at an angle with the drilling direction of the drilling equipment. It has an extended end extending out of the drilling equipment and a mounting cylinder cavity with an open extended end.

[0016] The adsorption unit 20 is fixedly arranged in the installation cylinder cavity.

[0017] The rotating structure 30 is rotatably disposed in the installation cylinder cavity and corresponds to the adsorption unit 20 , and one end of the rotating structure 30 extends out of the installation cylinder cavity.

[0018] The PDC composite layer 40 is integrally connected to the protruding end of the rotating structure 30. The PDC composite layer 40 has an annular cutting surface whose axis is colinear with the central axis of the mounting seat 10. The PDC composite layer 40 is used to rotate due to the friction of the rock in the borehole as the drilling equipment rotates, so that the annular cutting surface can be fully utilized.

[0019] Compared with the prior art, the PDC composite piece rotating device provided in this embodiment is provided with a mounting seat 10, one end of which can be fixed on the drilling equipment, and the other end can be extended out of the drilling equipment, and the extension direction is set at an angle with the drilling direction of the drilling equipment. An adsorption unit 20 is set in the open mounting cylinder cavity set along the central axis of the mounting seat 10, and a rotating structure 30 is set in the mounting cylinder cavity. The adsorption unit 20 can make the rotating structure 30 always located in the mounting cylinder cavity, one end of the rotating structure 30 extends out of the mounting cylinder cavity, and a PDC composite layer 40 is integrally connected to its extended end. The PDC composite layer 40 can cut the rock on the inner wall of the borehole through an annular cutting surface that is colinear with the central axis of the mounting seat 10, and rotate due to the friction of the rock in the borehole during the rotation of the drilling equipment, so that the annular cutting surface is fully utilized, thereby improving the utilization rate of the PDC composite piece during cutting, reducing the replacement cost, and having good adaptability and practicality.

[0020] In some embodiments, the rotating structure 30 may be configured as follows: Figure 2 See the structure shown. Figure 2The rotating structure 30 includes: a connecting shaft 31 and a mounting plate 32. The connecting shaft 31 is slidably connected to the mounting cylinder cavity and is rotationally connected to the mounting cylinder cavity. One end of the connecting shaft 31 abuts against the adsorption unit 20, and the other end extends out of the mounting cylinder cavity. The mounting plate 32 is connected to the extended end of the connecting shaft 31, and the end of the mounting plate 32 connected to the connecting shaft 31 abuts against the top of the mounting seat 10.

[0021] The connecting shaft 31 can ensure that the rotating structure 30 is slidably connected in the mounting cylinder cavity and is rotatably connected in the mounting cylinder cavity. It can abut against the adsorption unit 20. When passing through the adsorption unit 20, the rotating structure 30 is always located in the mounting cylinder cavity. The mounting plate 32 can be connected to the protruding end of the connecting shaft 31, and abut against the top of the mounting seat 10 through the connecting end of the mounting plate 32, which can cushion the impact on the drilling equipment during drilling.

[0022] In some embodiments, the connecting shaft 31 may be Figure 2 See the structure shown. Figure 2 , the connecting shaft 31 and the mounting plate 32 are integrally connected.

[0023] The integral connection of the connecting shaft 31 and the mounting plate 32 can be understood as fixing multiple parts tightly together in a specific way to form an integral structure. The integral connection means that two or more parts are fixed into an inseparable whole by welding, riveting or gluing. This connection method can increase the strength and stability of the structure, reduce looseness and wear caused by vibration or external force, and thus extend the service life of the equipment. The integral connection is a prior art and will not be elaborated here.

[0024] It should be explained that the connecting shaft 31 and the mounting plate 32 are the alloy base of the PDC composite layer 40. The PDC composite layer 40 is integrally connected to the base below. The PDC composite layer is sintered to the alloy base below at high temperature. The two parts are integrated into one and are called a PDC composite sheet.

[0025] In some embodiments, the connecting shaft 31 may be Figure 1 , Figure 2 See the structure shown. Figure 1 , Figure 2 The connecting shaft 31 and the mounting plate 32 are both made of cemented carbide.

[0026] Cemented carbide is an alloy material made from hard compounds of refractory metals and bonding metals through powder metallurgy. It has the characteristics of high hardness, high strength, corrosion resistance, and wear resistance. Cemented carbide is an alloy material made from hard compounds of refractory metals (such as tungsten carbide and titanium carbide) and bonding metals (such as cobalt and nickel) through powder metallurgy. Cemented carbide is an existing technology and will not be elaborated on here.

[0027] In some embodiments, the adsorption unit 20 may be configured as follows: Figure 2 See the structure shown. Figure 2 The adsorption unit 20 is a strong NdFeB magnet.

[0028] NdFeB strong magnet is a rare earth permanent magnet material with extremely high magnetic properties. It is a magnetic material made of rare earth metal neodymium, pure iron and boron using powder metallurgy process. NdFeB strong magnet is an existing technology and will not be elaborated here.

[0029] In some embodiments, the mounting base 10 may be used as follows: Figure 2 See the structure shown. Figure 2 The bottom end of the mounting seat 10 is provided with a through hole connected to the mounting cylinder cavity, and the through hole is used to facilitate the removal of the adsorption unit 20.

[0030] The through hole at the bottom of the mounting base 10 can facilitate the removal of the adsorption unit 20 .

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. PDC composite sheet rotating device, characterized in that: include: The mounting seat is fixed on the drilling equipment, and the central axis is arranged at an angle with the drilling direction of the drilling equipment, and has an extended end extending out of the drilling equipment, and has an installation cylinder cavity with an open extended end; An adsorption unit is fixedly arranged in the installation cylinder cavity; A rotating structure, which is rotatably disposed in the installation cylinder cavity and corresponds to the adsorption unit, and one end of the rotating structure extends out of the installation cylinder cavity; The PDC composite layer is integrally connected to the protruding end of the rotating structure. The PDC composite layer has an annular cutting surface whose axis is colinear with the central axis of the mounting seat. The PDC composite layer is used to rotate due to the friction of the rock in the borehole during the rotation of the drilling equipment, so that the annular cutting surface can be fully utilized.

2. The PDC composite sheet rotating device according to claim 1, characterized in that: The rotating structure comprises: A connecting shaft is slidably connected to the installation cylinder cavity and is rotationally connected to the installation cylinder cavity, one end of the connecting shaft abuts against the adsorption unit, and the other end extends out of the installation cylinder cavity; The mounting plate is connected to the extended end of the connecting shaft, and the connecting end of the mounting plate and the connecting shaft abuts against the top end of the mounting seat.

3. The PDC composite sheet rotating device according to claim 2, characterized in that: The connecting shaft and the mounting plate are integrally connected.

4. The PDC composite sheet rotating device according to claim 2, characterized in that: The connecting shaft and the mounting plate are both made of hard alloy.

5. The PDC composite sheet rotating device according to claim 1, characterized in that: The adsorption unit is a NdFeB strong magnet.

6. The PDC composite sheet rotating device according to claim 1, characterized in that: A through hole communicating with the mounting cylinder cavity is provided at the bottom end of the mounting seat, and the through hole is used to facilitate the removal of the adsorption unit.

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