Kellys

Kellys are made from 4145H modified alloy steel in accordance with API Spec.7-1 latest edition,
They are formed by hot foreged, quenched and tempered along full length to gain high phsical properties. All threads are phosphated, copperized or cold worked, and all kellys’ connectons are fitted with pressed steel thread protectors on both ends.

We supply square kelly and hexagonal kelly.
 

 

Integral spiral heavy weight drill pipe
Intergral spiral heavy weight drill pipe is made from AISI4145H alloy steel.acc.to API Spec.7. It is formed by hot forged and fully heat-treated. Spiral drill pipe’s wear resistance.
Hardbanding is standard on tool joint connections and central upset, the types of hardbanding include Arnco 100XT and 300XT. All threads are phosphated, copperized or cold worked. All connections are equipped with pressed steel thread protectors.

 

Lifting Subs
Lifting Subs are made from 4145H alloy steel, that are heat-treated according to drill collar specifications to ensure a hardness range of 285-341. Brinell. Charpy “V” notch minimum impact strength of 40 ft-lb at 700F are guaranteed one inch below the surface. All connections are phosphated or coppered coating to mimimize galling on initial make-up and drilling operation.

 

Short drill collars
Short drill collars are made from AISI 4145H alloy steel. Acc.to API spec.75-20 feet in length. All threads are phosphated, copperized or cold worked.