Type	Std. Opening Hole	Qty of cutters	Pilot Hole	Fishing neck			Down conn.	I.D	OAL	G.W with cutters
	mm(inch)		mm(inch)	length	Diameter	Up conn. API	API	mm(inch)	mm(inch)	(kg) approx.
				mm(inch)	mm(inch)
KZ3-311	311;12-1/4''	3	246;8-1/2''	457.2;18''	203;8''	6-5/8REG	4-1/2REG	38.1;1-1/2''	1524;60''	360
KZ3-444	444.5;17-1/2''	3	266.7;10-1/2''	457.2;18''	241.3;9-1/2''	7-5/8H90	7-5/8REG	57.2;2-1/4''	1752;69''	550
KZ3-660	660.4;26''	3	444.5;17-1/2''	457.2;18''	241.3;9-1/2''	7-5/8REG	7-5/8REG	76.2;3''	1753;69''	900
KZ3-914	914.4;36''		609.6;24''	609.6;24''	241.3;9-1/2''	7-5/8REG	7-5/8REG	76.2;3''	1905;75''	1000
KZ4-914	914.4;36''	4	457.2;18''	457.2;18''	254;10''	7-5/8REG	7-5/8REG	88.9;3-1/2''	2642;104''	1540
When ordering or requesting quotation, if size out of above specification, pls. specify clearly.

固定直径扩眼器由优质合金钢经过热处理制成，其强度高，性能可靠。轮臂易磨损部位经过表面硬化处理并焊于本体上，其上安装有可更换的牙轮。牙轮有三种类型：SM型—用于软地层至中硬地层；MH型—用于中硬地层至硬地层；XH型—用于硬地层。该扩眼器上有三个或六个装有可换合金喷嘴的喷管，这样，可形成喷射液流迅速清洁扩大的井眼。