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PDC Bit

PDC Bit

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PDC Bit

We introduce the patented technology (Patent No.XL96240609.0) for design and manufacture of the overall inside diamond drill bits of PDC and TSP. The crown outline shape comprises the para curve, median conic section, and circle, wherein the bit with the crown outline shape of the para curve can be used in various soft formations and has the advantages of large drilling footage, high rate of penetration and good stability. The bit with the crown outline shape of the median conic section and the circle has small working area, centralized water power, good penetration performance, high stability, safe and reliable use, and is applied in the turn plate and downhole drilling tool.

The bit has good cleaning effect, high cutting efficiency and long PDC teeth gauge protection section due to the arbitrary and high density arrangement of the teeth in the crown outline shape. In addition, the TSP teeth are used for strengthening of the gauge protection, thereby having rather high rate of penetration. Therefore, it can be used in the mud stone, clay stone, silt stone, non-consolidated sandstone, hydratable shale, non-hydraulic shale with low compressive strength, sandstone with low or medium compressive strength, and formation with medium abrasiveness.



The dimensions for the cutting teeth include 3/8'', 1/2'' and 3/4'' and 1'' circular glomerocryst composite teeth. Under a low weight on bit, the bit can penetrate into the formation to obtain the high drilling rate through the rock breaking by the shearing action.

With the open water flow design, arbitrary teeth arrangement and the optimized force distribution, the composite force tends to balance during drilling producing the anti-spin effect and anti-off- tracking effect. Moreover, the cutting teeth of the bit can be well cooled and cleaned.

Type Weight on Bits (KN) Rotation Speed(r/min) Mud Flow Rate (I/S) Water Ratio
3 7/8 SP 10-30 100-800 10-15 2-7
4 5/8 SP 15-40 100-800 10-15 2-7
5 1/4 SP 15-40 100-800 13-19 2-7
6 SF 15-50 100-800 15-22 2-7
7 1/2 SF 20-60 100-800 15-22 2-7
8 1/2 SF 30-80 100-800 25-35 2-7
8 3/4 SF 30-80 100-800 25-35 2-7
12 1/4 SF 80-100 100-800 50-68 2-7

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