Square Drive Roller Kelly Bushing

Country: China (Mainland)
Business Type: Trading Company
Market: Americas,Asia,Europe,Middle East,Oceania,Africa
Founded Year: 2011
Address: Huanghe
Contact: Nancy Zhu

The Square Drive Roller Kelly Bushing provides the following advantages:

1.Pulling out or feeding off string can be done while rotating;

2.Because of its whole construction, it can no fly out and hurts you.

3.The bushing is easily installed into the master bushing, maintaining good alignment;

4.The contact between Kelly and roller is rolling contact, so friction is lower, and weight on bit is accurate;

5.The Kelly has lower wear and has long life;

Kelly Size	Bottom seat (mm)
Inch	mm	Opposite side	Large end of the taper	Taper
3-1/2	88.9	332 (ZP520 rotary table) 342 (MR17.5 rotary table)	330 (ZP520 rotary table) 332 (MR17.5 rotary table)	1:3

4-1/4	107.95
5-1/4	133.35
4-1/2	115	332	330	1:3

API oil equipment Square Drive Roller Kelly Bushing