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Kelly Drive (for Drilling Rig)

Owetech kelly drives are used to apply rotational force to the entire drill string and drill bit for the purpose of breaking ground. The drill string components transmit torque and bear all the weight of the drill string. Our square Kelly and hexagonal Kelly both meet API specifications and we have 5 models for customers to choose from. All Owetech Kelly bars are designed with drawing steel thread protector caps.

We also provide steel pipe packaging service to satisfy all of our customers' needs.

Specification
Size Length Upper box connection Lower pin connection I.D. Driving section
mm in (in) Type(LH) O.D. Thread O.D. Cross flat For square Kelly Cross corner for hex
  Std . optional Std . optional
63.5 2 1/2 12.19 6 5/8REG 4 1/2REG 196.8 146 NC26 85.7 31.8 63.5 83.3  
76.2 3 12.19 6 5/8REG 4 1/2REG 196.8 146 NC31 104.8 44.4 76.2 100 85.7
88.9 3 1/2 12.19 6 5/8REG 4 1/2REG 196.8 146 NC38 120.6 57.2 88.9 115.1 100.8
108 4 1/4 12.9 6 5/8REG 4 1/2REG 196.8 146 NC46 158.8 71.4 108 141.3 122.2
6 5/8REG 4 1/2REG 196.8 146 NC50 161.9 71.4 108 141.3 122.2
133.4 5 1/4 12.9 6 5/8REG   196.8   5 1/2FH 177.8 82.6 133.3 175.4 151.6
6 5/8REG   196.8   NC56 177.8 82.6 133.3 175.4 151.6
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