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.

固定直徑擴眼器由優質合金鋼經過熱處理製成，其強度高，性能可靠。輪臂易磨損部位經過表面硬化處理並焊于本體上，其上安裝有可更換的牙輪。牙輪有三種類型：SM型—用於軟地層至中硬地層；MH型—用於中硬地層至硬地層；XH型—用於硬地層。該擴眼器上有三個或六個裝有可換合金噴嘴的噴管，這樣，可形成噴射液流迅速清潔擴大的井眼。