2 1/2 in - PDC BIT/TRICONE BIT/DRILL BITS FOR METAL

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HOME >Leading Products >Kelly

Kelly

2 1/2 in

Design Specifications

Length (ft)	40
Standard or optional	Standard
Top Connection	Connection : 6 5/8REG
	OD(in) : 7 3/4

Operating Parameters

Bottom Connection	Connection : NC26
	OD(in) : 3 3/8
Across Corners DC (mm)	83.3
ID (in)	1 1/4
Weight (kg)	389

●API Square Kelly,Product Schematic Diagram.

四方钻杆示意图.jpg

Kelly is the driven part of the whole drill string.

Kelly is divided into Square Kelly and Hexagonal Kelly. WOLFNI Kelly all conform to API Spec7-1.

The length of Kelly extends from 11meters, 12meters,16meters,and to the longest 27 meters.(connected with tool joint of high torsion resistance)

API Square Kelly
Size (in)	Length (ft)	Standard or optional	Top Connection		Bottom Connection		Across Corners	ID (in)	Weight (kg)
Size (in)	Length (ft)	Standard or optional	Connection	OD (in)	Connection	OD (in)	DC mm	ID (in)	Weight (kg)
2 1/2"	40	Standard	6 5/8REG	7 3/4	NC26	3 3/8	83.3	1 1/4	389
2 1/2"	40	Optional	4 1/2REG	5 3/4	NC26	3 3/8	83.3	1 1/4	349
3"	40	Standard	6 5/8REG	7 3/4	NC31	4 1/8	100.0	1 3/4	466
3"	40	Optional	4 1/2REG	5 3/4	NC31	4 1/8	100.0	1 3/4	436
3 1/2"	40	Standard	6 5/8REG	7 3/4	NC38	4 3/4	115.1	2 1/4	560
3 1/2"	40	Optional	4 1/2REG	5 3/4	NC38	4 3/4	115.1	2 1/4	532
4 1/4"	40	Standard	6 5/8REG	7 3/4	NC46	6 1/4	141.3	2 13/16	792
4 1/4"	40	Optional	4 1/2REG	5 3/4	NC46	6 1/4	141.3	2 13/16	756
4 1/4"	40	Standard	6 5/8REG	7 3/4	NC50	6 3/8	141.3	2 13/16	793
4 1/4"	40	Optional	4 1/2REG	5 3/4	NC50	6 3/8	141.3	2 13/16	758
5 1/4"	40	Standard	6 5/8REG	7 3/4	5 1/2FH	7	175.4	3 1/4	1202
5 1/4"	40	Standard	6 5/8REG	7 3/4	NC56	7	175.4	3 1/4	1196

With advanced sales network, our products

export to Russia, Germany, Czech Republic,

Iran, UAE, Kuwait, India, Kazakhstan,

Indonesia, Algeria, Argentina, Brazil, etc.

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