Soft formation TCI tricone bits: The soft formation TCI tricone bits are used to drill low compressive strength, very soft formations. This bit maximized to use of both conical and chisel tungsten carbide inserts of large diameters and high projection. This cutting structure design, combined with maximum cone offset, results in high bit penetration rates. The deep intermesh of cutter rows prevents bit bailing in sticky formations. Medium formation TCI tricone bits: The medium formation TCI tricone bits features aggressive chisel tungsten carbide inserts on the heel rows and inner rows. This design provides a fast drilling rate and added cutting structure durability in medium to medium hard for mations. The HSN rubber O-ring provides adequate sealing for bearing durability. Hard formation TCI tricone bits: The hard formation TCI tricone bits can be used to drill hard and abrasive formations. Wear resistance tungsten carbide inserts are used in the outer rows to prevent loss of bit gauge. Maximum numbers of hemispherical shaped inserts are used in all rows to provide cutter durability and long life. Table of classification of formation hardness and bit selection

Roller cone bit	IADC code of diamond bit	Formation description	Rock type	Compressive strength (Mpa)	ROP(m/h)
IADC code
111/124	M/S112~M/S223	Very soft:sticky soft formation with low compressive strength.	Clay Siltstone sandstone	<25	>20
116/137	M/S222~M/S323	Soft:soft formation with low compressive strength and high drillability.	Clay rock Marl Lignite sandstone	25~50	10~20
417/527	M/S323~M/S433	Medium soft:soft to medium formation with low compressive strength and steak.	Clay rock Marl Lignite Sandstone Siltstone Anhydrite Tuff	50~75	5~15
517/537	M322~M443	Medium:medium to hard formation with high compressive strength and thin abrasive streak.	Mudstone Dark rock shale	75~100	2~6
537/617	M422~M444	Medium hard:hard and dense formation with high compressive strength and medium abrasiveness.	Dark rock Hard shale Anhydrite Sandstone Dolomite	100~200	1.5~3

IADC CODE SELECTION

IADC	WOB	RPM	Application
	(KN/mm)	(r/min)
111/114/115	0.3-0.75	200-80	very soft formations with low compressive strength and high drill ability, like clay, mudstone, chalk
116/117	0.35-0.8	150-80	very soft formations with low compressive strength and high drill ability, like clay, mudstone, chalk
121	0.3-0.85	200-80	soft formations with low compressive strength and high drill ability, like mudstone, gypsum, salt, soft limestone
124/125		180-60
131	0.3-0.95	180-80	soft to medium formations with low compressive strength, like medium, soft shake, medium soft limestone, medium soft sandstone, medium formation with harder and abrasive interbeds
136/137	0.35-1.0	120-60
211/241	0.3-0.95	180-80	medium formations with high compressive strength, like medium, soft shake, hard gypsum, medium soft limestone, medium soft sandstone, soft formation with harder interbeds.
216/217	0.4-1.0	100-60
246/247	0.4-1.0	80-50	medium hard formation with high compressive strength, like hard shale, limestone, sandstone, dolomite
321	0.4-1.0	150-70	medium abrasive formations, like abrasive shale, limestone, sandstone, dolomite, hard gypsum, marble
324	0.4-1.0	120-50
437/447/435	0.35-0.9	240-70	very soft formations with low compressive strength and high drill ability, like clay, mudstone, chalk, gypsum, salt, soft limestone
517/527/515	0.35-1.0	220-60	soft formations with low compressive strength and high drill ability, like mudstone, gypsum, salt, soft limestone
537/547/535	0.45-1.0	220-50	soft to medium formations with low compressive strength, like medium, soft shake, medium soft limestone, medium soft sandstone, medium formation with harder and abrasive interbeds
617/615	0.45-1.1	200-50	medium hard formation with high compressive strength, like hard shale, limestone, sandstone, dolomite
637/635	0.5-1.1	180-40	hard formation with high compressive strength, like limestone, sandstone, dolomite, hard gypsum, marble
Note: Above limits of WOB and RRPM should not be used simultaneously

Production Process

Minimum Order Quantity	N/A
Price
Packaging Details	Standard Export Delivery Package
Delivery Time	7days
Payment Terms	T/T
Supply Ability	Based on Detailed Order