High-temperature and high-pressure assembly structure of special-shaped polycrystalline diamond drilling element

Abstract

The high-temperature and high-pressure assembly structure of the special-shaped polycrystalline diamond drilling element comprises a pyrophyllite block, a pressure transmitting medium is coaxially embedded and installed in the pyrophyllite block, and through holes are vertically formed in the centers of the interior of the pyrophyllite block and the interior of the pressure transmitting medium. A conductive steel ring, a first conductive assembly, a first pressure transmission assembly, a first conductive assembly, a heating tube, a first conductive assembly, a first pressure transmission assembly, a second conductive assembly and a conductive steel ring are sequentially arranged in the through hole from bottom to top in an abutting mode, and second conductive assemblies are embedded in the two pressure transmission assemblies; an insulating tube with two flush ends is coaxially arranged in the heating tube, a composite sheet assembly is mounted in the insulating tube, and two ends of the composite sheet assembly abut against the corresponding first conductive assemblies through insulating parts respectively. The temperature field uniformity of the composite sheet can be improved, the interface stress of the composite sheet can be weakened, and the composite sheet is suitable for drilling and production environments such as hard strata, complex strata, hard strata and interlayers.

Description

Technical Field

[0001] The utility model relates to the technical field of superhard composite materials, in particular to a high-temperature and high-pressure assembly structure of a special-shaped polycrystalline diamond drilling element. Background Art

[0002] Diamond is the hardest substance in nature and is widely used in superhard industrial production. However, as the drilling environment becomes more severe, the more traditional circular planar polycrystalline diamond composite sheet can no longer meet actual needs. In the process of artificial diamond synthesis, various special-shaped diamond composite sheets have been developed to overcome the shortcomings of circular planar diamond composite sheets. Their performance is more outstanding and they are widely used.

[0003] For example, the invention disclosure patent with patent number CN201910393366.2 discloses a one-time synthesized high-strength interface-bonded ridge-shaped polycrystalline diamond composite sheet, which includes a polycrystalline diamond layer and a tungsten carbide cemented carbide substrate layer bonded to the diamond layer; the polycrystalline diamond layer is formed by sintering diamond particles and a binder under high temperature and high pressure; the cemented carbide substrate is a tungsten carbide substrate, which is cylindrical in shape, and the contact interface with the polycrystalline diamond layer is a high-strength bonding interface, which increases the bonding ability of the polycrystalline diamond layer and the cemented carbide substrate layer. At the same time, the interface structure determines that the curved polycrystalline diamond composite sheet has directionality when used; the cutting tooth structure can reduce the cutting resistance of the composite sheet and greatly improve the drilling efficiency. This one-time synthesized high-strength interface-bonded ridge-shaped polycrystalline diamond composite sheet can effectively reduce the production and processing cycle, increase the bonding force between the polycrystalline diamond layer and the cemented carbide substrate layer, and improve the impact and wear resistance of the composite sheet.

[0004] Although this one-time synthesis of high-strength interface-bonded ridge-shaped polycrystalline diamond composite sheet effectively reduces the production and processing cycle, increases the bonding strength between the polycrystalline diamond layer and the cemented carbide substrate layer, and improves the impact and wear resistance of the composite sheet, the above-mentioned polycrystalline diamond composite sheet is relatively difficult to prepare in a single synthesis, and the existing stress will reduce the service life of the composite sheet. When used in relatively harsh drilling environments such as difficult-to-drill formations, complex formations, hard formations, and interlayers, it will still exhibit shortcomings such as poor temperature resistance and low drilling efficiency; further improvement is needed. Utility Model Content

[0005] The purpose of the utility model is to provide a high-temperature and high-pressure assembly structure of a special-shaped polycrystalline diamond drilling element, aiming to improve the existing polycrystalline diamond composite sheet when used in difficult-to-drill formations, complex formations, hard formations, interlayers and other harsh drilling environments, and still exhibit shortcomings such as poor temperature resistance and low drilling efficiency.

[0006] The utility model is implemented as follows: a high-temperature and high-pressure assembly structure of a special-shaped polycrystalline diamond drilling element, including a pyrophyllite block, a pressure-transmitting medium is coaxially inlaid and installed inside the pyrophyllite block, and a through hole is vertically provided in the center of the pyrophyllite block and the pressure-transmitting medium; a conductive steel ring, a first conductive component, a first pressure-transmitting component, a first conductive component, a heating tube, a first conductive component, a first pressure-transmitting component, a first conductive component and a conductive steel ring are sequentially abutted from bottom to top in the through hole, and a second conductive component is inlaid inside each of the two pressure-transmitting components; an insulating tube with flush ends is coaxially provided inside the heating tube, a composite sheet assembly is installed inside the insulating tube, and the two ends of the composite sheet assembly are respectively abutted on the corresponding first conductive component through insulating parts.

[0007] Preferably, the conductive steel rings at both ends of the heating tube are symmetrically arranged, and a groove is provided on the end surface of the conductive steel ring abutting against the first conductive component, and a filler is provided in the groove.

[0008] Preferably, the second conductive component and the first pressure transmission component are coaxially arranged, and both ends are flush.

[0009] Preferably, the composite sheet assembly is provided with a second pressure transmission assembly, a metal cup, a diamond composite sheet material and a composite sheet alloy substrate in sequence from top to bottom, the metal cup is mounted on the diamond composite sheet material and the composite sheet alloy substrate, the upper end of the second pressure transmission assembly abuts against the corresponding insulating part, and the lower end abuts against the metal cup, and the lower end of the composite sheet alloy substrate abuts against the corresponding insulating part.

[0010] Preferably, the cup body of the metal cup is embedded in the insulating tube, and the abutting surface of the metal cup and the second pressure transmission component is inclined; the composite sheet alloy matrix is arranged in the metal cup at one end and parallel to the bottom of the metal cup, and the lower end is horizontally abutted on the corresponding insulating part, and the diamond composite sheet material is adaptively arranged between the composite sheet alloy matrix and the metal cup.

[0011] Preferably, the composite sheet assembly includes multiple metal cups and a third pressure transmission assembly; the upper and lower end surfaces of the third pressure transmission assembly are respectively abutted with metal cups, the two metal cups are symmetrically arranged with their openings facing outward, and the two metal cups are sequentially provided with diamond composite sheet material and composite sheet alloy matrix from the inside to the outside; the end surfaces of the composite sheet alloy matrix extending out of the metal cup are respectively abutted on the corresponding insulating parts.

[0012] Preferably, the composite sheet assembly is arranged as a whole in a centrally symmetrical manner, the cup body of the metal cup is embedded in the insulating tube, the bottoms of the two metal cups are inclined and arranged in parallel, and the third pressure transmission assembly is adapted to be arranged between the two metal cups; the composite sheet alloy matrix is arranged at one end in the metal cup and parallel to the bottom of the metal cup, and the lower end is horizontally abutted on the corresponding insulating part, and the diamond composite sheet material is adapted to be arranged between the composite sheet alloy matrix and the metal cup.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model can improve the uniformity of the temperature field of the composite sheet and reduce its interface stress. When the device is used in difficult-to-drill formations, complex formations, hard formations, interlayers and other harsh drilling environments, it can improve the temperature resistance and drilling efficiency of the device.

[0015] 2. The present invention improves the stability and performance of the product by providing a second pressure transmission component and a third pressure transmission component and by using the special-shaped tooth support component structure in the second pressure transmission component and the third pressure transmission component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic cross-sectional view of Example 1 of the present utility model;

[0017] Figure 2 This is a schematic cross-sectional view of Example 2 of the present utility model;

[0018] Figure 3 It is a schematic diagram of the installation structure of the metal cup of the utility model.

[0019] In the figure: 1. Conductive steel ring; 2. Filler; 3. First conductive component; 4. First pressure transmission component; 5. Second conductive component; 6. Heating tube; 7. Insulator; 8. Pyrophyllite block; 9. Pressure transmission medium; 10. Insulating tube; 11. Second pressure transmission component; 12. Diamond composite sheet material; 13. Composite sheet alloy matrix; 14. Metal cup; 15. Third pressure transmission component. DETAILED DESCRIPTION

[0020] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0021] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0022] Example 1

[0023] like Figure 1 and Figure 3 As shown, a high-temperature and high-pressure assembly structure of a special-shaped polycrystalline diamond drilling element includes a pyrophyllite block 8, a pressure transmission medium 9 is coaxially inlaid and installed inside the pyrophyllite block 8, and a through hole is vertically provided in the center of the pyrophyllite block 8 and the pressure transmission medium 9; a conductive steel ring 1, a first conductive component 3, a first pressure transmission component 4, a first conductive component 3, a heating tube 6, a first conductive component 3, a first pressure transmission component 4, a first conductive component 3 and a conductive steel ring 1 are sequentially abutted from bottom to top in the through hole, and the conductive steel rings 1 at both ends of the heating tube 6 are symmetrically arranged and abutted against each other; the conductive steel ring 1 has the functions of conducting electricity and transmitting pressure, and the first conductive component 3 is made of titanium The heating tube 6 is made of graphite tube material. The conductive steel ring 1 is provided with a groove at the end face of the first conductive component 3. The groove is provided at the center of the conductive steel ring 1. A filler 2 is provided in the groove. The end of the filler 2 close to the first conductive component 3 is at the same level as the conductive steel ring 1 and is also in contact with the end face of the first conductive component 3. The two first pressure transmission components 4 are coaxially embedded with a second conductive component 5. The second conductive component 5 is made of titanium circle, steel pad, etc. The first pressure transmission component 4 is made of dolomite, zirconia, etc. The second conductive component 5 is coaxially arranged with the first pressure transmission component 4, and the two ends are flush. The heating tube 6 is coaxially provided with an insulating tube 10 that is flush with the two ends of the heating tube 6. The insulating tube 10 is a composite material pressed in three sections, with salt at the two ends and dolomite or magnesium oxide in the middle. A composite sheet assembly is installed inside the insulating tube 10, and the two ends of the composite sheet assembly are respectively in contact with the corresponding first conductive component 3 through an insulating member 7.

[0024] like Figure 1 and Figure 3As shown, the composite sheet assembly is provided with a second pressure transmission component 11, a metal cup 14, a diamond composite sheet material 12 and a composite sheet alloy substrate 13 from top to bottom. The metal cup 14 is made of niobium cup, zirconium cup, molybdenum cup, etc. The metal cup 14 is set on the diamond composite sheet material 12 and the composite sheet alloy substrate 13. The upper end of the second pressure transmission component 11 abuts on the corresponding insulating member 7, and the lower end abuts on the metal cup 14. The lower end of the composite sheet alloy substrate 13 abuts on the corresponding insulating member 7; the cup body of the metal cup 14 is embedded in the insulating tube 10, and the metal cup 14 is provided in the insulating tube 10. The inner diameter of the cup 14 is the same as the inner diameter of the insulating tube 10, and the abutting surface of the metal cup 14 and the second pressure transmission component 11 is inclined; the composite sheet alloy matrix 13 is arranged at one end in the metal cup 14 and is parallel to the bottom of the metal cup 14, and the lower end is horizontally abutted on the corresponding insulating member 7, and the diamond composite sheet material 12 is a parallelogram shape, and the diamond composite sheet material 12 is adapted to be arranged between the composite sheet alloy matrix 13 and the metal cup 14; the second pressure transmission component 11 is a special-shaped tooth support component, and the material is made of alloy, dolomite, zirconia and other materials.

[0025] Example 2

[0026] like Figure 2 and Figure 3 As shown, a high-temperature and high-pressure assembly structure of a special-shaped polycrystalline diamond drilling element includes a pyrophyllite block 8, a pressure transmission medium 9 is coaxially inlaid and installed inside the pyrophyllite block 8, and a through hole is vertically provided in the center of the pyrophyllite block 8 and the pressure transmission medium 9; a conductive steel ring 1, a first conductive component 3, a first pressure transmission component 4, a first conductive component 3, a heating tube 6, a first conductive component 3, a first pressure transmission component 4, a first conductive component 3 and a conductive steel ring 1 are sequentially abutted from bottom to top in the through hole, and the conductive steel rings 1 at both ends of the heating tube 6 are symmetrically arranged and abutted against each other; the conductive steel ring 1 has the functions of conducting electricity and transmitting pressure, and the first conductive component 3 is made of titanium The heating tube 6 is made of graphite tube material. The conductive steel ring 1 is provided with a groove at the end face of the first conductive component 3. The groove is provided at the center of the conductive steel ring 1. A filler 2 is provided in the groove. The end of the filler 2 close to the first conductive component 3 is at the same level as the conductive steel ring 1 and is also in contact with the end face of the first conductive component 3. The two first pressure transmission components 4 are coaxially embedded with a second conductive component 5. The second conductive component 5 is made of titanium circle, steel pad, etc. The first pressure transmission component 4 is made of dolomite, zirconia, etc. The second conductive component 5 is coaxially arranged with the first pressure transmission component 4, and the two ends are flush. The heating tube 6 is coaxially provided with an insulating tube 10 that is flush with the two ends of the heating tube 6. The insulating tube 10 is a composite material pressed in three sections, with salt at the two ends and dolomite or magnesium oxide in the middle. A composite sheet assembly is installed inside the insulating tube 10, and the two ends of the composite sheet assembly are respectively in contact with the corresponding first conductive component 3 through an insulating member 7.

[0027] like Figure 2 and Figure 3 As shown, the composite sheet assembly includes multiple metal cups 14 and a third pressure transmission assembly 15. The metal cups 14 are made of niobium cups, zirconium cups, molybdenum cups, etc. The third pressure transmission assembly 15 is in the shape of a parallelogram. The upper and lower end surfaces of the third pressure transmission assembly 15 are respectively abutted with metal cups 14. The two metal cups 14 are opened outward and are symmetrically arranged. The two metal cups 14 are sequentially provided with diamond composite sheet materials 12 and composite sheet alloy substrates 13 from the inside to the outside. The end surfaces of the composite sheet alloy substrates 13 extending out of the metal cups 14 are respectively abutted on the corresponding insulating members 7. The diamond composite sheet material 12 is in the shape of a parallelogram. The composite sheet assembly as a whole is centrally shaped. Symmetrically arranged, the cup body of the metal cup 14 is embedded in the insulating tube 10, the inner diameter of the metal cup 14 is the same as the inner diameter of the insulating tube 10, the bottoms of the two metal cups 14 are inclined and arranged in parallel, and the third pressure transmission component 15 is adapted to be arranged between the two metal cups 14; the composite sheet alloy matrix 13 is arranged at one end in the metal cup 14 and parallel to the bottom of the metal cup 14, and the lower end is horizontally abutted on the corresponding insulating part 7, and the diamond composite sheet material 12 is adapted to be arranged between the composite sheet alloy matrix 13 and the metal cup 14; the third pressure transmission components 15 are all special-shaped tooth support components, and the materials used are alloy, dolomite, zirconium oxide and other materials.

[0028] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A high-temperature and high-pressure assembly structure of a special-shaped polycrystalline diamond drilling element, comprising a pyrophyllite block (8), characterized in that: A pressure transmission medium (9) is coaxially embedded in the interior of the talc block (8), and a through hole is vertically provided in the center of the interior of the talc block (8) and the pressure transmission medium (9); a conductive steel ring (1), a first conductive component (3), a first pressure transmission component (4), a first conductive component (3), a heating tube (6), a first conductive component (3), a first pressure transmission component (4), a first conductive component (3) and a conductive steel ring (1) are sequentially abutted from bottom to top in the through hole, and a second conductive component (5) is embedded in the interior of each of the two first pressure transmission components (4); an insulating tube (10) with flush ends is coaxially provided in the interior of the heating tube (6), and a composite sheet component is installed in the interior of the insulating tube (10), and insulating parts (7) are provided at both ends of the composite sheet component, and the composite sheet component is abutted on the corresponding first conductive component (3) through the insulating parts (7).

2. The high-temperature and high-pressure assembly structure of a special-shaped polycrystalline diamond drilling element according to claim 1, characterized in that: The conductive steel rings (1) at both ends of the heating tube (6) are symmetrically arranged, and the end surface of the conductive steel ring (1) abutting against the first conductive component (3) is provided with a groove, and a filler (2) is provided in the groove.

3. The high-temperature and high-pressure assembly structure of a special-shaped polycrystalline diamond drilling element according to claim 1, characterized in that: The second conductive component (5) and the first pressure transmission component (4) are coaxially arranged, and both ends are flush.

4. The high-temperature and high-pressure assembly structure of a special-shaped polycrystalline diamond drilling element according to claim 1, characterized in that: The composite sheet assembly is provided with a second pressure transmission assembly (11), a metal cup (14), a diamond composite sheet material (12) and a composite sheet alloy matrix (13) in sequence from top to bottom; the metal cup (14) is mounted on the diamond composite sheet material (12) and the composite sheet alloy matrix (13); the upper end of the second pressure transmission assembly (11) abuts against the corresponding insulating member (7), and the lower end abuts against the metal cup (14); the lower end of the composite sheet alloy matrix (13) abuts against the corresponding insulating member (7).

5. The high-temperature and high-pressure assembly structure of a special-shaped polycrystalline diamond drilling element according to claim 4, characterized in that: The cup body of the metal cup (14) is embedded in the insulating tube (10), and the abutting surface of the metal cup (14) and the second pressure transmission component (11) is inclined; one end of the composite sheet alloy substrate (13) is arranged in the metal cup (14) and is parallel to the cup bottom of the metal cup (14), and the lower end is horizontally abutted on the corresponding insulating member (7); the diamond composite sheet material (12) is adapted to be arranged between the composite sheet alloy substrate (13) and the metal cup (14).

6. The high-temperature and high-pressure assembly structure of a special-shaped polycrystalline diamond drilling element according to claim 1, characterized in that: The composite sheet assembly includes a plurality of metal cups (14) and a third pressure transmission assembly (15); the upper and lower end surfaces of the third pressure transmission assembly (15) are respectively abutted with metal cups (14), the two metal cups (14) are opened outward and are centrally symmetrically arranged, and the two metal cups (14) are sequentially provided with diamond composite sheet material (12) and composite sheet alloy matrix (13) from the inside to the outside; the end surfaces of the composite sheet alloy matrix (13) extending outside the metal cups (14) are respectively abutted on the corresponding insulating parts (7).

7. The high-temperature and high-pressure assembly structure of a special-shaped polycrystalline diamond drilling element according to claim 6, characterized in that: The composite sheet assembly is arranged in a centrally symmetrical manner as a whole, the cup body of the metal cup (14) is embedded in the insulating tube (10), the cup bottoms of the two metal cups (14) are inclined and arranged in parallel, and the third pressure transmission component (15) is adapted to be arranged between the two metal cups (14); the composite sheet alloy matrix (13) is arranged in the metal cup (14) at one end and parallel to the cup bottom of the metal cup (14), and the lower end is horizontally abutted on the corresponding insulating member (7), and the diamond composite sheet material (12) is adapted to be arranged between the composite sheet alloy matrix (13) and the metal cup (14).

Images