Factory of High-Quality 15.5 IADC 127/217 Milled Tooth Tricone Bits

STEEL MILLING TOOTH BITS IADC 1 SERIES DRILL BITS These bits are used to drill low-compressive strength, soft formations. Long projection tooth lengths are used on high offset cones to provide the greatest penetration rates possible. Wear-resistant hardfacing is used to control tooth wear. On the softest bit types this hardfacing completely covers the bit teeth. IADC 2 SERIES DRILL BITS

These bits are used to drill high-compressive strength, medium hard formations. Short projection teeth with reduced crest length are used in this series of bit designs. Durable hardfacing is applied to reduce tooth wear.

IADC 3 SERIES DRILL BITS These bits are used to drill hard and abrasive formations. Very short, closely spaced teeth with minimum amounts of hardfacing are used for breakage resistance. These bits must withstand high loads and drill abrasive formations with a crushing, cutting action.

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	IADC code of diamond bit	Formation description	Rock type	Compressive strength (Mpa)	ROP(m/h)
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

Steel Tooth Tricone Bits Size

Regular Sizes	Regular IADC	API Reg Pin	Make-up Torque(N.m)
3 7/8"(98.4mm)	126/216/637	2 3/8	4100~4700
4 5/8"(117.4mm)	126/216/517/537/637	2 7/8	6100~7500
5 1/4"(133.3mm)	126/216/517/537/637	3 1/2	9500~12200
5 5/8"(142.8mm)	126/216/517/537/637	3 1/2	9500~12200
5 7/8"(149.2mm)	126/216/517/537/637	3 1/2	9500~12200
6"(152.4mm)	126/127/216/517/537/617/637	3 1/2	9500~12200
6 1/4"(158.7mm)	126/127/216/517/537/617/637	3 1/2	9500~12200
6 1/2"(165mm)	126/127/216/517/537/617/637	3 1/2	9500~12200
7 1/2"(190mm)	126/216/517/537	4 1/2	16300~21700
7 5/8"(193mm)	126/216/517/537	4 1/2	16300~21700
7 7/8"(200mm)	126/216/517/537	4 1/2	16300~21700
8 1/2"(215.9mm)	117/127/217/437/517/537/617/637	4 1/2	16300~21700
9 1/2"(241.3mm)	117/127/217/437/517/537/617/637	6 5/8	38000~43400
9 7/8"(250.8mm)	117/127/217/437/517/537/617/637	6 5/8	38000~43400
10 5/8(269.8mm)	117/127/137/217/517/537/617/637	6 5/8	38000~43400
11 5/8(295.3mm)	117/127/137/217/517/537/617/637	6 5/8	38000~43400
12 1/4"(311.1mm)	114/127/217/437/517/537/617/637	6 5/8	38000~43400
13 5/8"(346.0mm)	127/217/517/537/617/637	6 5/8	38000~43400
14 3/4"(374.6mm)	127/217/517/537/617/637	7 5/8	46100~54200
17 1/2"(444.5mm)	114/115/125/215/515/535/615/635	7 5/8	46100~54200
26"(660.4mm)	114/115/125/215/515/535/615	7 5/8	46100~54200

Notes for the use of roller cone bits: 1 .Before the drill bit is down, it is necessary to confirm that the bottom of the well is clean, free of grit, and no metal falling. 2. Check if the thread connection screw of the roller cone bit is intact and the nozzle is installed properly. 3. Run in hole needs to be stable, avoid stress and prevent drilling. 4. The last joint needs a large displacement to start the rotary table and keep reaming to bottom of the well., fully wash the well to prevent the debris from clogging the nozzle. 5. The shape of the bottom hole should be lightly pressed and slowly turned into contact with the bottom of the well, smalldrilling pressure, low speed, large displacement, small torque, and the speed is 40~60 rev / min, at least 30 minutes. 6. Determine the weight on bit and speed in combination with the actual conditions of the formation. 7. During drilling ahead, the operation should be smooth, drill feeding should be uniform, it is strictly forbidden to lift and release the drill sharply,drill string not well braked and drill string free fall. 8. If it is found that the drill bit stops making progress, the pump pressure increases and decreases obviously, the rate of penetration is suddenly decreased, and the torque is increased, lift the drill to check without delay.

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