Physical features
1. extreme hardness
2.higher compression strength
3. good self-sharpening 4. impact toughness is better than natural diamond, worse than cemened carbide. The polycrystalline layer is easy to fracture under the effectof impulsive load
5. sensitive to temperature. About 350℃, the wear rate accelerated significantly. about 700℃, strength failure
6. Journal sealed insert bit
7. The durability of premium tungsten carbide inserts is improved with new formulas and new techniques
8. The premium HNBR Oring, optimal seal compression and curved seal structure can enhance the seal performance
9. The pressure compensator system and advanced grease can greatly increas
Model
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114,117,127,437,517,617,637,737,837etc
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Type
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Steel body PDC drill bits, tungsten carbide matrix PDC bit
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Appliable
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water well, oil field, construction, geothermal
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Formation
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sticky,soft,medium hard,hard formation
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Bearing
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rubber seal or metal seal
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Packing
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steel box,or as customer requirements
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Payment Term
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T/T,L/C
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MOQ
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1 Piece
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Function &Advantage:
1. Suitable for soft to medium-hard formations
2. Operating in cutting principle, cutting rock in low energy consumption
3. PDC cutters have the characteristics of super hardness, wear resistance and self-sharpening
belongs to fixed tooth bit, hasn’t active components and work in high reliability
Cements
Cementing the casing serves several functions: segregating formations behind the pipe to confine production to a specific zone, providing support for the casing and helping to protect the pipe from corrosive formation fluids. As wells are drilled deeper, high pressures, high temperatures and corrosive fluids place demands on the performance of cements that are quite different from those encountered in conventional drilling.
For example, the cement slurry needs to have a low viscosity to enable it to be easily pumped to a greater depth. High pressures and temperatures can alter the setting behavior of the cement, so the slurry must be specially designed for predetermined downhole conditions. If the cement sets too quickly the well can be lost; too slowly can mean an expensive loss in drilling time and possible communication behind pipe due to fluid influx.
For example, the cement slurry needs to have a low viscosity to enable it to be easily pumped to a greater depth. High pressures and temperatures can alter the setting behavior of the cement, so the slurry must be specially designed for predetermined downhole conditions. If the cement sets too quickly the well can be lost; too slowly can mean an expensive loss in drilling time and possible communication behind pipe due to fluid influx.
The long-term integrity of the cement under harsh pressure and temperature conditions is also important. Poor cement qualities over time can result in casing corrosion and collapse, fluid migration behind pipe, or loss of support and formation-to-pipe seal. Formation fluids high in carbon dioxide are particularly effective at causing cement to deteriorate; in some cases within five years.