API drill bit GY Series Tir-cone Rock Bits For Oil-well Drilling made in China

packed by wooden case

Specifications

1.Certified by API
2.3 7/8 inch rock bit
3.Best quality and low price
4.Reliable bearing
5.Best services

GY Series Tir-cone Rock Bits For Oil-well Drilling

Features:

   This series have two kinds of classification: inserted bit and steel tooth.

   Inserted bit is inserted teeth jet bit with sealed journal of oil bearing. Adopting the optimized design, the teeth placement of cone is reasonable, the tooth shape and height are designed differently in accordance with various kinds of rock formations, and gage protection is better.

   The bear system which is adopted copper inlaid and silver plating improve the loading capacity and seizure resistance, and prolong the bit working life.

   This product is widely used for oil and natural gas field’s drilling and geological exploitation. Using this product, user can gain high drilling efficiency.

   Steel tooth bit is tri-cone bit with roller bearing for oil well drilling. The tooth surface is welded and applied with tungsten carbide powder coat. The bearing system is suitable for high rotary rate.

   Drilling in the adaptable rock formation, the bit can obtain high PRM, long working life, reliably working.

Parameter of GY:

Type	IADC	Bit Size		Std.API pin Shank Size (Inches)	Approximate weight of bits (kg)
		Inches	mm
3 3/8GY537	537	3 3/8	85.7	1 57/64 No stds	3
3 7/8GY517	517	3 7/8	98.4	2 3/8REG	5
3 7/8GY537	537	3 7/8	98.4	2 3/8REG	5
4 5/8GY537	537	4 5/8	117.5	3 1/2REG	8
5 5/8GY537	537	5 5/8	142.9	3 1/2REG	13
5 7/8GY537	537	5 7/8	149.2	3 1/2REG	13
6 1/4GY517	517	6 1/4	159.3	3 1/2REG	20
7 5/8GY517	517	7 5/8	193.7	4 1/2REG	32
7 5/8GY537	537	7 5/8	193.7	4 1/2REG	32
7 7/8GY517	517	7 7/8	200	4 1/2REG	35
7 7/8GY537	537	7 7/8	200	4 1/2REG	35
8 1/2GY447G	447	8 1/2	215.9	4 1/2REG	42
8 1/2GY447G	447	8 1/2	215.9	4 1/2REG	42
8 1/2GY447T	447	8 1/2	215.9	4 1/2REG	42
8 1/2GY517	517	8 1/2	215.9	4 1/2REG	42
8 1/2GY517FT	517	8 1/2	215.9	4 1/2REG	42
8 1/2GY537	537	8 1/2	215.9	4 1/2REG	42
8 1/2GY537T	537	8 1/2	215.9	4 1/2REG	42
8 1/2GYT437L	437	8 1/2	215.9	4 1/2REG	42
8 1/2GYT517L	517	8 1/2	215.9	4 1/2REG	42
8 3/4GY447G	447	8 3/4	222.3	4 1/2REG	42
8 3/4GY447T	447	8 3/4	222.3	4 1/2REG	42
8 3/4GY517B	517	8 3/4	222.3	4 1/2REG	42