supply Rotary Subs

Rotary Subs is applied in transfer and connection among drill parts in the artesian well operation. ZJTG Rotary Subs are made from 4145 H modified quenched and tempered material to API specifications, and carry the API monogram. ZJSBs Rotary Subs can be divided into samediameter type, reducing type, and left rotation type according to shapes and applications.All connections are cold rolled saver sub and kemplated and furnished with pressed steel thread protectors. typespecification(in)standardσb(Mpa)σ0.2(Mpa)δ4Akv(J)HBadapter31/8 67/8APISpec.7-1≥965.3≥758≥13---->2857 10≥931≥68931/8 73/4SY5200–93≥965≥760≥13≥54285 3408 11≥930≥690277 340