Overview and structural characteristics of tricone bit for steel tooth series oil-Jiangxi Feilong Rock Bit Manufacture Co., Ltd.

Overview and structural characteristics of tricone bit for steel tooth series oil

时间：2021-10-28 来源：Jiangxi Feilong Rock Bit Manufacture Co., Ltd. 129

1、Summarize

Teeth of steel tooth bits are made from the bit cones by milling. Most teeth are wedge-shaped. Tungsten carbide particle hardfacing is liberally applied to the working face and back cone of the teeth.。

2、Structural features

Steel tooth bit is a tri-cone rock bit with roller bearing for oil well drilling. Tungsten carbide particle hardfacing is liberally applied to the teeth surface. The bearing system is suitable for high rotary speed. It can perform high PRM, long working life and reliable drilling in appropriate formations. It can be adaptable from soft to middle medium formations, widely used in oil-well drilling, mining, geological prospecting, hydrogeologic prospecting, piling, geothermal exploitation, water-well drilling etc.

Apply high abrasion resistant alloy sand on the face of palm and teeth to ensure the long working life.

Optimized teeth placement, height and shapes guarantees the well capacity of cutting and excellent cutting speed.

3、Recommended drilling parameters

Formation	Bit Type	Drilling Weight (KN/mm)	Rotary Speed (r/m)
Very soft: such as soft marl, clay, salt, etc.	111	0.4-0.7	180-90
Soft: such as clay, marl, soft sandstone, salt,etc.	121	0.45-0.75	180-90
Soft: such as clay, marl, soft sandstone, salt,etc.	127	0.45-0.75	180-90
Medium soft: such as shale, marl, sandstone,soft limestone, etc.	131	0.5-0.75	120-60
Very soft: such as soft marl, clay, soft sandstone, salt, etc.	114	0.4-0.7	120-45
Soft: such as clay, soft shale, marl, salt, etc.	124	0.5-0.85	120-45

Note: The upper limits of drilling weight and rotary speed recommended in above table could not be used at the same time.

4、Main type

Type	IADC	Bit Size		Std.API pin Shank Size (inches)	Approximate weight of bits (Kg)
Type	IADC	Inches	Mm	Std.API pin Shank Size (inches)	Approximate weight of bits (Kg)
3 5/8GY126	126	3 5/8	92.1	2 3/8REG	5
3 3/4GY126	126	3 3/4	95.3	2 3/8REG	5
3 7/8GY131	131	3 7/8	98.4	2 3/8REG	5
4 1/2GY126	126	4 1/2	114.3	2 3/8REG	8
4 5/8GY126	126	4 5/8	117.5	2 3/8REG	8
8 1/2GY121	121	8 1/2	215.9	4 1/2REG	42
8 1/2GY114	114	8 1/2	215.9	4 1/2REG	42
8 1/2GY124	124	8 1/2	215.9	4 1/2REG	42
8 1/2GY124	124	8 1/2	215.9	4 1/2REG	42
8 1/2GY127	127	8 1/2	215.9	4 1/2REG	42
9 1/2GY127	127	9 1/2	241.3	6 5/8REG	50
9 5/8GY121	121	9 5/8	244.5	6 5/8REG	55
9 5/8GY124	124	9 5/8	244.5	6 5/8REG	55
9 5/8GY127	127	9 5/8	244.5	6 5/8REG	55
9 7/8GY127	127	9 7/8	250.8	6 5/8REG	64
12 1/4GY121	121	12 1/4	311.2	6 5/8REG	90
12 1/4GY124	124	12 1/4	311.2	6 5/8REG	90
12 1/4GY126	126	12 1/4	311.2	6 5/8REG	90
12 1/4GY127L	127	12 1/4	311.2	6 5/8REG	90
13 3/4GY127	127	13 3/4	349.3	6 5/8REG	1230
13 3/4GY127L	127	13 3/4	349.3	6 5/8REG	1230
15 GY127	127	15	381	7 5/8REG	180
15 GY127L	127	15	381	7 5/8REG	180
17 1/2GY121	121	17 1/2	444.5	7 5/8REG	246
17 1/2GY124	124	17 1/2	444.5	7 5/8REG	246
17 1/2GY125	125	17 1/2	444.5	7 5/8REG	246
17 1/2GY127L	127	17 1/2	444.5	7 5/8REG	246
26P1	111	26	660.4	7 5/8REG	700