HDS ROLLER KELLY BUSHING-Jiangsu Rushi Machinery Co., Ltd.

Roller kelly bushing is a necessary tool for drilling, by matching with rotary square to drive kelly pipe. Through the rotation of four rolls, the friction between rolls and kelly pipes is reduced to

The company has developed a wide variety of mechanized wellhead tools for oil drilling and production with a full set of models, including more than 50 series and more than 100 models including ZQ drill pipe power tong series

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Product description

Roller kelly bushing is a necessary tool for drilling, by matching with rotary square to drive kelly pipe. Through the rotation of four rolls, the friction between rolls and kelly pipes is reduced to extend service life. Change different rollers to match with different squares and hexagonal kelly pipes and connect with different rotary tables. Two transmission styles (square and pinconnect) are available. The product is designed and manufactured according to API Spec 7K “Specification for Drill Equipment”.

Technical specifications：

Model		HDS	27-HDP	20-HDP	MDS	20-MDP	17-MDP	LDS
Type		Heavy			Medium			Light
Max.torque	N.m	32365			22555			13729
	ft.lbf	23871			16636			10126
Drive Mode		Square	Pin		Square	Pin		Square
Square	mm	76.2～152.4			63.5～133.35			63.5～133.35
	in	3～6			2¹/₂～5¹/₄			2¹/₂～5¹/₄
Hex	mm	76.2～152.4			76.2～107.95			76.2～107.95
	in	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
	in	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