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API Rotary Kelly pipe(Square Kelly and Hexagonal Kelly) for oilfield
- Manufacturer: Kelly
Manufactured from AISI 4145H-modified fully heat-treated alloy steel with a Brinell hardness range of 285-341 Kelly is the drive part of whole drill string, it transmit the torsional energy from the rotary table ...
Dongying, China 
WN-2 Kelly Valve with API, Oil drilling special
- Manufacturer: Kelly
Products Description The WN-2 Ball Type Kelly Valve provides a quick, sure shutoff in the drill string that can repay the cost of the valve quickly in the mud savings and kick protection. This valve can be used a...
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