Alleviated Steel Drill Papes

Alleviated Steel Drill Papes with welded connectors are used for geophysical surveys in prospecting and exploration of solid minerals.

Alleviated Steel Drill Pipes

Technical characteristics of Alleviated Steel Drill Pipes

Standard size Pipe Connector Length L, m Weight, kg Thread Torque, Nm (±5%)
External diameter D, mm Wall thickness t, mm External diameter D1, mm Internal diameter d, mm OD of tong recess S, mm
ASDP-24 24.0 2.5 24.5 9 19 0.83 1.42 SPK-18 100
ASDP-34 34.0 3.5 34.5 16 27 1.00 3.29 SPK-27 500
ASDP-43 43.0 3.5 43.5 22 32 1.00 4.18 SPK-34 1000
ASDP-43 43.0 3.5 43.5 22 32 1.50 5.88 SPK-34 1000
ASDP-43 43.0 3.5 43.5 22 32 3.00 11.0 SPK-34 1000
ASDP-55 55.0 3.5 55.5 32 46 1.00 5.95 SPK-45 1800
ASDP-55 55.0 3.5 55.5 32 46 1.50 8.17 SPK-45 1800
ASDP-55 55.0 3.5 55.5 32 46 3.00 14.83 SPK-45 1800
ASDP-55 55.0 4.5 55.5 32 46 4.70 27.6 SPK-45 1800

Mechanical properties of pipes (at least)

Parameters Pipe (steel strength K) Pipe (steel 45) Connector (special steel)
Tensile strength, MPa 686 539 882
Yield strength, MPa 490 323 686
Elongation, % 12 16 15
Hardness HRC 26

Note:

  1. Mechanical properties of the drill pipe as well as for the weld seam.
  2. Mechanical properties of connectors indicated after the volumetric heat treatment.
  3. Surface hardness after heat treatment: pipe – not less 40 HRC, heat treated connector – not less 55 HRC.