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API 5CT L80/N80/J55/K55 BTC Dheesha iyo Tubadaha Tuubbooyinka
Halbeegga API SPEC 5CT, API SPEC 5B, ISO11960 Tubooyinka Codsiga: Waxaa loo isticmaalaa in lagu qaado saliid ceyriin iyo gaaska dabiiciga ah ee ka samaysan saliidda iyo gaaska ilaa dusha sare ka dib marka la dhammeeyo qodista2-3/8" ilaa 4-1/2.
Codsiga daaska: sidoo kale loo isticmaalo darbiyada saliidda iyo gaaska Wells.sizes:4-1/2”—20"
Fasalada ugu muhiimsan ee tuubada birta: J55, K55, N80-1 N80-Q
