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Civil Construction

Civil Construction

API Drill Pipe

Drill Pipe Inc. begins the manufacturing process utilizing the best material, that is, premium alloy steel with top-of-the-line mill certification credentials verifying metallurgy, Tensile strength, Yield strength and Elongation, all critical to the performance of the Drill Pipe.

We employ Inertia Welding technology for our pipe, from 2 7/8"-5 1/2," and it is Submerge Arc Welded from 6"-7 5/8". All threads are manufactured from 4140 Alloy Steel with heat-treatment enhancement Q&T, which further increases their strength and durability.

Expert machinists thread the tool joints on the most modern CNC Machining Centers the industry has to offer. Laser-aided Quality Control insures axial dimensions are correct so the tools are straight and run true. There are plenty of good reasons behind the quality of our Drill Pipe.

Construction Drill Pipe Chart

API Drill
Pipe OD 
Pipe Wall Pipe Length Threads Tool Joint ID Weight/Ft Flats pin Flats Box
2 3/8" .190 wall 1M, 1.5M, 5', 2M, 3M, 10' 2 IF 1" 5.5# 4 4
  .254 wall 1M, 1.5M, 5', 2M, 3M, 10'     7# 4 4
  .280 wall 1M, 1.5M, 5', 2M, 3M, 10'     8# 4 4
2 7/8" .217 wall 1M, 1.5M, 5', 2M, 3M, 10' 2 3/8 M Jr 1 1/2" 8# 4 4
  .276 wall 1M, 1.5M, 5', 2M, 3M, 10'     9# 4 4
  .362 wall 1M, 1.5M, 5', 2M, 3M, 10'     11# 4 4
3" .156 wall 1M, 1.5M, 5', 2M, 3M, 10' 2 3/8 Reg 1" 7# 4 4
  .188 wall 1M, 1.5M, 5', 2M, 3M, 10'     8# 4 4
  .250 wall 1M, 1.5M, 5', 2M, 3M, 10'     9# 4 4
  .375 wall 1M, 1.5M, 5', 2M, 3M, 10'     12# 4 4
3 1/2" .219 wall 1M, 1.5M, 5', 2M, 3M, 10' 2 3/8 Reg 1" 9# 4 4
  .250 wall 1M, 1.5M, 5', 2M, 3M, 10'     10# 4 4
  .368 wall 1M, 1.5M, 5', 2M, 3M, 10'     14# 4 4
4" .262 wall 1M, 1.5M, 5', 2M, 3M, 10' 3 1/2 Reg 1 3/4" 13# 2 2
  .330 wall 1M, 1.5M, 5', 2M, 3M, 10'     15# 2 2
4 1/2" .250 wall 1M, 1.5M, 5', 2M, 3M, 10' 3 1/2 Reg 1 3/4" 14# 2 2
  .337 wall 1M, 1.5M, 5', 2M, 3M, 10'     18# 2 2
5" .296 wall 1M, 1.5M, 5', 2M, 3M, 10' 3 1/2 Reg 1 3/4" 18# 2 2
  .362 wall 1M, 1.5M, 5', 2M, 3M, 10'     20# 2 2
5 1/2" .361 wall 1M, 1.5M, 5', 2M, 3M, 10' 4 1/2 Reg 2 1/4" 22# 2 2
6 5/8" .352 wall 1M, 1.5M, 5', 2M, 3M, 10' 4 1/2 Reg 2 1/4" 27# 2 2
7" .362 wall 1M, 1.5M, 5', 2M, 3M, 10' 6 5/8 Reg 3 1/2" 29# 2 2
7 5/8" .375 wall 1M, 1.5M, 5', 2M, 3M, 10' 6 5/8 Reg 3 1/2" 34# 2 2

DPI Inc. has an exceptionally comprehensive range of in-house manufacturing capabilities. This enables us to offer custom manufactured product - "built to order" for nearly all configurations of Drill Pipe.

Our in-house combination of Engineering, Machining Centers - Inertia / Sub Arc welding technology - Upsetting - Heat Treating Capability/ Expertise including Annealing - Quench and Temper - Induction Hardening - meticulous quality control - coupled with experience in manufacturing drilling tool for over 35 years, is significant. This enables us to deliver Drill Pipe that matches your specific application, even if considered unusual.

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