Wholesale API rotary tricone drilling bits in the stock from China factory is for deep oil well. Bit Description: IADC: 537 - TCI journal sealed bearing bit with gauge protection for soft to medium soft formations with low compressive strength . Compressive Strength: 85 - 100 MPA 12,000 - 14,500 PSI Ground Description: Medium hard and abrasive rocks such as sandstones with streaks of quartz, hard limestone or chert, hematite ores, hard, well-compacted abrasive rock such as: sandstones with quartz binder, dolomites, quartzite shales, magma and metamorphic coarse grained rocks. We can offer TCI bits in avariety of sizes (from 3" to 26") and all most of IADC codes.Far Eastern are factory specializes in drill bits,such as tricone bits, PDC bits, HDD hole opener,Foundation roller cutters for different applications. As a leading drill bits factory in China,increase the drill bit working life is our target. We always try to improve the bits with high penetration rates.Our purpose is to sell the high quality with the lowest price. Shale gas well drilling bit 7 5/8inches IADC537G, for medium formations. 7 5/8inches(200.0mm) TCI tricone bit, as a regular diameter, it is preferable for clients working in shale gas well drilling IADC537G illustrates some features of the tricone bit. Firstly, it is chisel-inserts, for drilling medium hardness and dense formations with high compressive strength and some abrasive layer, ranging from 80 to 150Mpa .Secondly, it is sealed journal bearing with gauge protection.What's more, it has extra gage protection on the back of the arm/leg.