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Help CenterSquare Drive Drilling Rig Components Roller Kelly Drive Bushing
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Certification:CE,FCC,MSDS
API 7K Roller Kelly Drive Bushing / square drive roller kelly bushings
Roller kelly bushing is a necessary tool for drilling. It is to drive kelly spinner by matching with master bushing.
Through rotating of four rollers, the friction between rollers and kelly pipe is reduced and service life is extended.
For different sizes of kelly pipe and hexagonal pipe only need to change corresponding rollers. To connect with
rotary table, there are two transmission styles (square and pin). The product is designed and manufactured
according to API Spec 7K “Specification for Drill Equipment”.
The details are as bellow:
Model | HDS | 27-HDP | 20-HDP | MDS | 20-MDP | 17-MDP | LDS |
|
Type | Heavy | Medium | Light |
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Max. torque | N.m | 32365 | 22555 | 13729 |
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ft.lbf | 23871 | 16636 | 10126 |
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Drive Mode | Square | Pin | Square | Pin | Square |
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Square | mm | 76.2~152.4 | 63.5~133.35 | 63.5~133.35 |
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in | 3~6 | 21/2~51/4 | 21/2~51/4 |
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Hex | mm | 76.2~152.4 | 76.2~107.95 | 76.2~107.95 |
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in | 3~6 | 3~41/4 | 3~41/4 |
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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 |
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Weight | Kg | 700 | 730 | 670 | 420 | 460 | 340 | 400 |
lb | 1540 | 1610 | 1470 | 924 | 1012 | 750 | 808 |
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