Pup joints

We can produce any type of pup joints using the same material as our drill collars. It’s a kind of pony collar. All the connections undergo phosphate coated to improve resistance to corrosion. Standard lengths are 5ft, 10ft, 15ft and 20ft. Additional sizes are available upon requirements. Pup joints have the same properties in tensile, yield and torsional strength as that of S-135 which has the same inner diameter. All products are conformed to the API specifications.

Lift subs and lift plugs

Lifts subs and lift plugs are manufactured with the same specifications as drill collars.

Cross over sub

Adapter subs are in standard length of 36〞or 48〞, adopting its material as the same as that of the drill collar. Trepanned and drifted to API Spec 7 requirements, including kelly saver subs, straight OD subs and reduced section sub.