Roller Kelly Bushing

27-HDP ROLLER KELLY BUSHING HDS ROLLER KELLY BUSHING
27-HDP ROLLER KELLY BUSHING HDS ROLLER KELLY BUSHING

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”.

Model HDS 27-HDP 20-HDP MDS 20-MDP 17-MDP LDS
Type 重型 中型 轻型
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

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