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COMMAND-SMFI's Heavy Weight Drill Pipe (HWDP) features a tool joint pin and box and a thick-walled tube with a raised central section for wellbore protection of the tube. The central section comes in various designs; slick, spiral, full spiral, or tri-spiral. HWDP can be manufactured as a welded assembly or machined integral from bars. HWDP in the bottom-hole assembly (BHA) provide a gradual transition between drill pipe and drill collars. Its main function is to transfer surface weight-on-bit (WOB) and pipe rotation to the drilling assembly. It also mitigates drill string fatigue and provides directional control of the BHA. In addition, Heavy Weight Drill Pipe can be used to push or force liners/screens down hole during drilling operations.


Vertical Drilling:

  • Weight-on-bit and compressive load member
  • Transitional and fatigue resistant member
  • Replacement of drill collars
  • Directional, Horizontal, and Extended Reach Drilling:

  • Weight-on-bit and compressive load member
  • Differential sticking and drill string lock-up prevention
  • Directional control of BHA
  • Remedial Operations:

  • Provide the weight required for milling, under-reaming, and hole-opening operations


  • Pipe body OD from 2-7/8" to 6-5/8"
  • API 7.1 & 7.2 specifications
  • Welded construction
  • Slick central section
  • Central upset with two bands each of 3" of hardbanding material to protect casing and prevent wear
  • Range 2 and 3 lengths
  • API & H90 connections
  • Fatigue resistance features (threads cold rolled, API pin stress relief groove, and API box bore-back)
  • Phosphate coating on threads and shoulders
  • Variety of steel grades: API, Sour Service, NS1, Low Temp
  • Options

  • Integral construction
  • Central section design: Spiral, Full-Spiral or Tri-Spiral
  • Longer tool joints, providing a maximum re-cut capability for longer service life
  • Internal Plastic Coating (IPC)
  • NS-1 or DS-1 or customers specifications
  • High-performance double shoulder connections upon request
  • HB 1” taper
  • HB extra length
  • Higher toughness specification providing greater safety margins in extreme drilling conditions
  • Make and Break
  • Other options upon request