what is a drill collar?the drill collar is one of the core components of the drill string in oil and gas drilling. it is located at the bottom of the drill string and directly connected to the drill bit. it is mainly used to provide drilling pressure and maintain the stability of the drill string. i

what is a drill pipe? what is its function?a drill pipe is a steel pipe with a threaded tail, which is used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or bottom hole device at the bottom of the well. the drill pipe is the core component of the drill

what is seamless steel pipe?seamless steel pipe (smls pipe) is a continuous metal steel pipe that is made by hot rolling, cold rolling or cold drawing, and is processed into a hollow pipe by perforation or extrusion of solid steel billet. there is no welding process in the whole process, so it is ca

what is schedule 80 pipe?schedule 80 steel pipe (sch 80) is an internationally used pipe wall thickness standard and is one of the pipe series specified by the asme b36.10/b36.19 standard. its core feature is the thickened pipe wall design, which is suitable for high pressure, high temperature or se

what is schedule 40 steel pipe?schedule 40 steel pipe (sch 40) is an internationally used pipe wall thickness standard and is one of the pipe series specified by asme b36.10 & b36.19 standards. it represents medium-walled steel pipes suitable for a variety of medium and low pressure applications