Roller Kelly Bushings

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The roller kelly bushing manufactured by RUSHI is an essential tool for oil well servicing. In conjunction with master bushing, this kelly bushing drives square kelly, and friction is reduced via 4 rollers in rotating motion. Thus, service life is extended.

Different rollers can be applied for square kelly and hexagonal kelly of different specifications. Hence, this square drive roller kelly bushing can be connected to various kinds of rotary tables.

Generally, this oilfield equipment accommodates square drive and pin drive. It completely conforms to API 7K specification. Besides, our quality inspectors perform random check for all components and end products before delivery, so please be assured that your choice is quite right.

Technical Parameters

Model		HDS	27-HDP	20-HDP	MDS	20-MDP	17-MDP	LDS
Type		Heavy-duty			Medium-duty			Light-duty
Max. torque	N·m	32365			22555			13729
	ft·lbf	23871			16636			10126
Drive mode		Square drive	Pin drive		Square drive	Pin drive		Square drive
Square kelly	mm	76.2-152.4			63.5-133.35			63.5-133.35
	inch	3-6			21/2-51/4			21/2-51/4
Hexagonal kelly	mm	76.2-152.4			76.2-107.95			76.2-107.95
	inch	3-6			3-41/4			3-41/4
Size	mm	630×630 ×740	630×630 ×780		493×493 ×696	510×510 ×720	458×458 ×700	508×508 ×700
	inch	24.8×24.8 ×29.1	24.8×24.8 ×30.7		19.4×19.4 ×27.4	20×20×28.3	18×18×27.5	20×20× 27.5
Weight	kg	700	730	670	420	460	340	400
	lb	1540	1610	1470	924	1012	750	808