12 1/4'' IADC517 Tricone Bits for Well Drilling

1. Specification of the 12 1/4'' IADC517 Tricone Bits

Bit Type	TCI Tricone Bits
Material	High Manganese Steel
Size	12 1/4''
IADC	517
Thread	6 5/8'' API Reg.
WOB	0.35~1.0 KN/mm
RPM	60~240 r/min
Torque	38~43.4
Bearing	Journal, Metal Sealed
Packing	Fumigation Free Wooden Box
Weight	110kg
Application	Well Drilling
Formation	soft to medium hard formation
Cutting Structure	Tungsten Carbide Inserts
Advantage	Gauge Protection

2. Features of Tricone Bits

1. Cutting Structure of this series tricone bit :
The durability of premium tungsten carbide inserts is improved with new formulas and new techniques for insert bit.The wear-resistance of teeth is enhanced with premium tungsten carbide hardfacing on the tooth surfaces for steel tooth bit.

2. Gauge Structure of this series tricone bit :
Multiple gauge protection with gauge trimmers on heel and gauge inserts on the gauge surface of the cone, tungsten carbide inserts and hardfacing on the shirttail increases gauge holding capability and bearing life.

3. Bearing Structure of this series tricone bit :
High precision bearing with two thrust faces. Balls lock the cone.Hardface heard bearing surface. Cone bearing inlaid with friction-reducing alloy and then silver-plated. Abrasion resistance and seizure resistance of the bearing are improved and suitable for high rotary speed.

4.Seal and Lubrication of this series tricone rock bit:
The advanced metal seal package consists of two metal seats and two elastic energizers. Compressed energizers ensure good contact being kept on two sealing surfaces of metal rings by elastic force, and achieve the bearing seal. In the drilling, metal seal are relatively dynamic, and the energizers are static. This will improve the reliability and durability of bearing seal. The pressure compensator system and advanced grease can greatly increase the lubricating reliability.

3. Applicable Formation of the Tricone Bits

Steel Tooth Rock Bits
IADC	Formation	Rock Type
111/114/115/116/117/121/124/125/126/127/124/135/136/137	Very Soft to soft formation with low compressive strength and high drillability	clay, mudstone, marlite
214/215/216/217/225/235/241/244/245	Medium Soft formstion with low compressive strength and high drillability	marlite, saline rock, shale
315/316/317//321/324/325	Hard semi-abrasive formations	shale, sandstone, chalk, dolomite
TCI Rock Bits
IADC	Formation	Rock Type
415/425/437/435/445/447	Soft formation with low compressive strength and high drillability	clay, mudstone, marlite
515/517/525/527/535/537/545/547	Soft to Medium hard formation with low compressive strength	marlite, saline rock, shale
615/617/625/627/635/637/647	Medium hard formations with high compressive strength formations	shale, sandstone, chalk, dolomite, hard gypsum
732/737	Hard, semi-abrasive and abrasive formations	hard shale, hard limestone, sandstone, whinstone, flintstone, granite, quarts sandstone, hard dolomite
827/837	Extremely hard and abrasive formation