In conventional drill string configurations, weighted drill pipes are employed between drill pipes and drill collars to mitigate stress concentration between flexible drill pipes and rigid drill collars. In horizontal and extended-reach wells, they often replace drill collars to reduce friction losses.

Our company strictly adheres to standards such as API Spec 7-1, NS-1, and DS-1 to provide customers with high-performance weighted drill pipe products. We continuously develop weighted drill pipe solutions tailored to special operating conditions, keeping pace with advancements in drilling technology.

• Drill Pipe Manufacturing Process (English Version)

  
  

  nspection → End upsetting → Integral heat treatment → Pipe straightening → Pipe inspection (leakage, ultrasonic) → Physical and chemical testing → Finished pipe inspection → Cold straightening → Pipe end machining

Tool Joint Processing

• Tool joint material incoming inspection → Sawing and forging (if necessary) → Joint upsetting → Joint marking → Joint heat treatment → Joint Brinell hardness testing → Physical and chemical testing → Ultrasonic inspection

• Make-up/break-out test (if necessary) → Phosphating → Magnetic particle inspection → Joint marking → Cold rolling (if necessary) → Finished joint inspection → Joint thread machining → Joint profile machining

• Final joint inspection

Drill Pipe Processing

• Drill pipe & joint end face preparation → Friction welding → Weld post-heating → Weld flash removal → Weld heat treatment (quenching, tempering) → Physical and chemical testing → Weld finishing → Magnetic particle inspection

• Ultrasonic inspection → Finished product inspection → Hardbanding (if necessary) → Internal coating (if necessary) → Measuring, weighing and marking → Final inspection → Packaging → Delivery