A polycrystalline diamond composite sheet for shale oil/shale gas deep well drilling and preparation method thereof
A technology of polycrystalline diamond and shale gas, which is applied in drilling equipment, drill bits, earthwork drilling and production, etc. It can solve the problems of poor comprehensive mechanical and thermal properties, weak diamond encapsulation force, and shortened operation cycle, etc., and achieve excellent mechanical and thermal performance. Thermal properties, enhanced compatibility and bonding strength, and high-strength effects
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Embodiment 1
[0047] like figure 1 As shown, the polycrystalline diamond compact for shale oil / shale gas deep well drilling in this embodiment includes a cemented carbide substrate 1 and a first transition layer 2 and a second transition layer sequentially arranged on the cemented carbide substrate 1 3. The third transition layer 4 and polycrystalline diamond layer 5; the polycrystalline diamond layer is made up of the following raw materials by weight: 94.8% of graphene-coated diamond micropowder, 0.2% of carbon nanotubes and 5% of binding agent ; The first transition layer is composed of the following raw materials by weight: 64% of cemented carbide powder, 34.8% of cubic boron nitride powder, 0.2% of carbon nanotubes and 1% of binder; the second transition layer It is composed of the following raw materials by weight: 50% of cemented carbide powder, 30% of graphene-coated diamond micropowder, 18.8% of cubic boron nitride micropowder, 0.3% of carbon nanotubes and 0.9% of binder; the third...
Embodiment 2
[0062] The polycrystalline diamond compact for shale oil / shale gas deep well drilling in this embodiment includes a cemented carbide substrate and a first transition layer, a second transition layer, a third transition layer and Polycrystalline diamond layer; the polycrystalline diamond layer is composed of the following raw materials by weight: 97% of graphene-coated diamond micropowder, 0.1% of carbon nanotubes and 2.9% of binder; the first transition layer is composed of The raw material composition by weight percentage: cemented carbide powder 74%, cubic boron nitride powder 25.4%, carbon nanotube 0.1% and binder 0.5%; the second transition layer is composed of the following raw materials by weight percentage Composition: 59% cemented carbide powder, 25% graphene-coated diamond micropowder, 15.4% cubic boron nitride micropowder, 0.2% carbon nanotube and 0.4% binder; the third transition layer is composed of the following weight percentages The composition of raw materials:...
Embodiment 3
[0076] The polycrystalline diamond compact for shale oil / shale gas deep well drilling in this embodiment includes a cemented carbide substrate and a first transition layer, a second transition layer, a third transition layer and Polycrystalline diamond layer; the polycrystalline diamond layer is composed of the following raw materials by weight: 95% of graphene-coated diamond micropowder, carbon nanotubes 0.15 % and binder 4.85%; the first transition layer is composed of the following raw materials by weight: 69% of cemented carbide powder, 30% of cubic boron nitride powder, 0.15% of carbon nanotubes and 0.85% of binder; The second transition layer is composed of the following raw materials by weight: 55% of cemented carbide powder, 27% of graphene-coated diamond micropowder, 17% of cubic boron nitride micropowder, 0.3% of carbon nanotubes and 0.7% of binder %; the third transition layer is composed of the following raw materials by weight: 35% of cemented carbide powder, 64% ...
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Abstract
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