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product name: Roller Kelly Bushing
Description:
Roller Kelly Bushing is an essential petroleum drilling tool, and can be equipped with rotary slips, so as to drive Kelly bar. The product reduces its friction with Kelly bar by the rolling of four rollers in order to prolong its life. The product can also fit to four-sided or six-sided Kelly bar by charging roller, and then connect it with various rotary tables, with two drive methods, namely, square rolling and pin shaft rolling.
Features
The Roller Kelly Bushing is simple in operation, convenient in installation and perfect in safety performance. It can be applied to rotary table from 17 1/2” to 49 1/2”.
   Specification
Specification of Roller Kelly Bushing
Kelly Size
Elevation
(mm)
Bedplate Size
 (mm)
Tapering
in
mm
 
Top
 
Lower
Opposite Side
Large End
3 1/2
88.9
406
356
332
φ332
1:3
4 1/4
107.95
5 1/4
133.35
 
 
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