Drill Pipe

Secoroc Tubes -- Part of a Productive Package
Though their importance is often underestimated, tubes play an important role in DTH drilling -- regardless of application, rock type, hole depth, or drill rig. The key features of a high quality DTH tube are durability, accuracy, and manageability.
High Quality Tubing
Secoroc tubes are made from cold drawn tubing, providing a superior surface finish and tolerance compared to their hot-rolled counterparts. Our solution drastically reduces the risk of scaling -- the cause of so many premature hammer failures.

No Weak Links
Traditionally the threads and the joint between the tube and the end-pieces are vulnerable. To combat the problem we've friction-welded the joints for maximum strength and heat-treated the end-pieces for optimum durability.
Never Losing the Thread
Heat-treating the threads ensures not only a long service life, but also simplifies joining and breaking -- thereby cutting cycle time. To meet varying demands, we provide a selection of API threads. For applications where foam injection are used, we recommend the IF thread. Naturally, we also offer a wide range of subs and crossovers -- all made of high quality steel and heat-treated in the same way as tube end-pieces.

Pipes From 4-1/2" and Wall Thickness >0.346"
Hot Rolled Grade API J-55

Technical Spec:

Tubing J-55 Tool Joints, Adapters
Tensile Strength (RM) min. 75,000 PSI Surface Hardness 58-62 HRC
Yield Strength (ReH) min. 55,000 PSI Depth 0.080"
Elongation (A5) min. 15% Core Hardness 32-36 HRC (approx. 300 HB)

Hot rolled tubing fits inside the API N-80 standard, but it has the following shortcomings:
  • The hot rolled surface is rough and can release scaling from the inside, which can enter into the hammer and cause severe damage to internal components.
  • A rough surface gives higher friction losses, resulting in a higher pressure drop in the drill string.
  • Wide tolerance of the wall thickness +/- 10-12%.
  • Straightness tolerance not assigned. Must be straightened after welding.
  • Production problems due to wide tolerances.

Pipes From 2-3/4" to 4-1/2" and Wall Thickness >0.346"
Hot Rolled Grade API J-55

Technical Spec:

Tubing N-80 Tool Joints, Adapters
Tensile Strength (RM) min. 100,000 PSI Surface Hardness 58-62 HRC
Yield Strength (ReH) min. 80,000 PSI Depth 0.080"
Elongation (A5) min. 18% Core Hardness 32-36 HRC (approx. 300 HB)

In order to improve the quality of DTH tubes we are now changing over to cold drawn tubing, and the features and benefits are as follows:
Feature Hot Rolled Tubing Cold Drawn Tubing
Ovality Included in the tolerance for the wall Included in the tolerance for the wall
Wall Thickness +/- 10-12% +/- 3-4%
Straightness N/A 0.012"/ft

Benefits in Short of Cold Drawn Tubing:
  • Reliable wall thickness
  • Less ovality, less risk of eccentric wear
  • Better quality of the friction weld, less risk of concentricity of welding
  • Better wear resistance due to increased hardness
  • Reliable weights max 2-3% variance
  • Less risk of damage to the tube from the straightening operation
  • An overall weight reduction of our DTH tube assortment
  • Still API N-80 standard for tubing

Friction Welding 2-3/4" to 5-1/2" ---- Over 5-1/2" Shrink Fit and Stick Welded

Friction Welding:
  • Friction welding is a safe and efficient way to weld the end-pieces on to the tube material. The welding becomes stronger than the tube.
  • Friction welding is a combination between friction and pressure.
  • The end-pieces rotate with a speed of 480 RPM, and the pressure is between 1,015 PSI and 2,175 PSI depending on the tube diameter and wall thickness.

Friction Welded:
  • Friction welding gives much stronger joints, compared with electrode welding, due to less risk of impure joints.



Rotary Head The power unit that rotates the drill string.
Spindle Adapter Also called a "saver sub," threads into the rotary head and drill pipe, protects the threads of the rotary head, considered to be part of rotary head.
Drill Pipe Available in a variety of lengths, diameters, wall thicknesses, and thread configurations.
Starter Pipe Similar to the drill pipe, always the first pipe in the hole, usually shorter to compensate for the length of the DTH hammer, and with a greater wall thickness to withstand more abrasion as the hole is drilled.
Sub Adapter Usually a short adapter, threaded on both ends in a male/female, female/female, male/male configuration. May be used to increase or decrease the thread diameter or change the thread style as needed for a particular application.
DHT Hammer/ DTH Bit The percussive mechanism that drills the hole. Available in a wide range of diameters and styles depending on the application.
Rotary (Tricone) Bit May take the place of the DTH Hammer and Bit in applications where percussive drilling is not required.

Click on below tabs for detailed information

  Wrench Flats  
Dia (inch) Thread Pin/Box* Comp Wall Thick (inch) Length (feet) inch Flat loc Hex (inch) Wgt (lbs.)
3.50 2-3/8 API reg Pipe 0.500 30.0 3.5 Both Ends No 491
3.50 2-3/8 API reg Pipe 0.337 25.0 2.5 Both Ends No 315
3.50 2-3/8 API reg Starter Pipe 0.750 21.0 2.5 Both Ends No 485
3.50 2-3/8 API reg Starter Pipe 0.500 26.6 3.5 Both Ends No 441
4.00 2-7/8 API reg Pipe 0.337 30.0 3.5 Pin Only 3.50 489
4.00 2-7/8 API reg Pipe 0.750 30.0 3.5 Pin Only 3.50 751
4.00 2-7/8 API reg Pipe 0.337 25.0 3.5 Pin Only 3.50 421
4.00 2-7/8 API reg Pipe 0.337 25.0 3.0 Both Ends No 410
4.00 2-7/8 API reg Pipe 0.337 25.0 3.5 Both Ends No 410
4.00 2-7/8 API reg Starter Pipe 0.750 26.6 3.5 Pin Only No 520
4.00 2-7/8 API reg Starter Pipe 0.337 21.0 3.0 Both Ends No 313
4.00 2-7/8 API reg Starter Pipe 0.337 21.0 3.5 Both Ends No 313
4.00 2-7/8 API reg Starter Pipe 0.750 21.0 3.5 Both Ends No 388
4.50 2-7/8 IF Pipe 0.337 25.0 3.5 Pin Only 4.00 412
4.50 2-7/8 IF Starter Pipe 0.625 21.0 3.5 Both Ends No 584
4.50 2-7/8 IF Pipe 0.337 30.0 3.5 Pin Only 4.00 489
4.50 2-7/8 IF Pipe 0.337 20.0 3.5 Box Only No 344
4.50 3-1/2 API reg Pipe 0.625 25.0 3.5 Pin Only 4.00 833
4.50 3-1/2 API reg Pipe 0.337 30.0 3.5 Pin Only 4.00 489
4.50 3-1/2 API reg Pipe 0.750 30.0 3.5 Pin Only 4.00 989
4.50 3-1/2 API reg Pipe 0.500 30.0 3.5 Pin Only 4.00 667
4.50 3-1/2 API reg Pipe 0.430 35.0 3.5 Pin Only 4.00 760
4.50 3-1/2 API reg Starter Pipe 0.750 26.6 3.5 Pin Only No 855
4.50 3-1/2 IF Pipe 0.337 20.0 3.5 Box Only No 344
5.00 3-1/2 API reg Pipe 0.375 25.0 3.5 Pin Only 4.00 562
5.00 3-1/2 API reg Pipe 0.500 25.0 3.5 Pin Only 4.00 630
5.00 3-1/2 API reg Pipe 0.750 25.0 3.5 Pin Only 4.00 907
5.00 3-1/2 API reg Pipe 0.500 30.0 3.5 Pin Only 4.00 756
5.00 3-1/2 API reg Pipe 0.337 30.0 3.5 Pin Only 4.00 837
5.00 3-1/2 API reg Pipe 0.750 30.0 3.5 Pin Only 4.00 1,081
5.00 3-1/2 API reg Pipe 0.500 35.0 3.5 Pin Only 4.00 874
5.00 3-1/2 API reg Pipe 0.750 35.0 3.5 Pin Only 4.00 1,264
5.00 3-1/2 API reg Starter Pipe 0.750 26.6 3.5 Both Ends No 980
5.00 3-1/2 API reg Starter Pipe 0.375 21.6 3.5 Both Ends No 485
5.00 3-1/2 API reg Starter Pipe 0.750 29.6 3.5 Both Ends No 1,086
5.00 3-1/2 API reg Starter Pipe 0.750 31.6 3.5 Both Ends No 1,159
5.00 3-1/2 Beco Pipe 0.750 30.0 3.5 Pin Only 4.62 1,097
5.00 3-1/2 Beco Pipe 0.500 30.0 3.5 Pin Only 4.62 773
5.00 3-1/2 Beco Pipe 0.500 35.0 3.5 Pin Only 4.62 892
5.00 3-1/2 Beco Pipe 0.500 25.0 3.5 Pin Only 4.62 654
5.00 3-1/2 Beco Starter Pipe 0.500 26.6 3.5 Pin Only No 573
5.00 3-1/2 Beco Starter Pipe 0.500 21.6 3.5 Pin Only No 551
5.50 3-1/2 Beco Pipe 0.415 25.0 4.5 Both Ends 5.00 733
5.50 3-1/2 Beco Pipe 0.415 30.0 4.5 Both Ends 5.00 866
5.50 3-1/2 Beco Pipe 0.750 30.0 4.5 Both Ends 5.00 1,240
5.50 3-1/2 Beco Pipe 0.750 25.0 4.5 Both Ends 5.00 1,044
5.50 3-1/2 Beco Pipe 0.750 35.0 4.5 Both Ends 5.00 1,434
5.50 3-1/2 Beco Starter Pipe 0.415 25.8 4.5 Both Ends No 685
5.50 3-1/2 Beco Starter Pipe 0.415 20.8 4.5 Both Ends No 621
6.25 4 Beco Pipe 0.500 25.0 4.5 Both Ends 5.00 868
6.25 4 Beco Pipe 0.500 30.0 4.5 Both Ends 5.00 1,013
6.25 4 Beco Pipe 0.750 30.0 4.5 Both Ends 5.00 1,447
6.25 4 Beco Pipe 0.500 35.0 4.5 Both Ends 5.00 993
6.25 4 Beco Pipe 0.750 35.0 4.5 Both Ends 5.00 1,678
6.25 4 Beco Starter Pipe 0.500 25.8 4.5 Both Ends No 899
6.25 4 Beco Starter Pipe 0.500 20.8 4.5 Both Ends No 747
7.00 4-1/2 Beco Pipe 0.750 25.0 5.0 Pin Only 6.00 1,410
7.00 4-1/2 Beco Pipe 0.750 30.0 5.0 Pin Only 6.00 1,672
7.00 4-1/2 Beco Pipe 0.750 35.0 5.0 Pin Only 6.00 1,945
7.00 4-1/2 Beco Pipe 0.500 30.0 5.0 Pin Only 6.00 1,174
7.00 4-1/2 Beco Pipe 0.500 25.0 5.0 Both Ends 6.00 1,042
7.00 4-1/2 Beco Pipe 0.500 30.0 5.0 Both Ends 6.00 1,200
7.00 4-1/2 Beco Pipe 0.500 35.0 5.0 Both Ends 6.00 1,372
7.00 4-1/2 Beco Pipe 0.750 30.0 6.0 Both Ends 6.50 1,703
7.00 4-1/2 Beco Pipe 1.000 25.0 6.0 Both Ends 6.50 1,443
7.00 4-1/2 Beco Starter Pipe 0.500 25.7 5.0 Pin End No 1,205
7.62 5-1/4 Beco Pipe 0.750 25.0 6.0 Both Ends 6.50 1,571
7.62 5-1/4 Beco Pipe 0.875 25.0 5.0 Pin Only 6.50 1,709
7.62 5-1/4 Beco Pipe 0.750 30.0 6.0 Both Ends 6.50 1,857
7.62 5-1/4 Beco Pipe 0.750 30.0 6.75 Both Ends No 1,877
7.62 5-1/4 Beco Pipe 1.000 30.0 6.0 Both Ends 6.50 2,220
7.00 4-1/2 Beco Pipe 0.625 35.0 5.75 Both Ends No 1,619
7.00 4-1/2 Beco Pipe 1.000 35.0 5.75 Both Ends No 2,077
7.00 4-1/2 Beco Pipe 0.750 35.0 5.75 Both Ends No 1,945
7.00 4-1/2 Beco Starter Pipe 1.000 30.3 5.75 Both Ends No 1,760
7.00 4-1/2 Beco Starter Pipe 0.750 29.0 5.75 Both Ends No 1,652
7.00 5-1/4 Beco Pipe 0.625 35.0 6.50 Both Ends No 1,619
7.00 5-1/4 Beco Starter Pipe 0.625 31.9 6.50 Both Ends No 1,478
7.00 5-1/4 Beco Starter Pipe 0.625 32.9 6.50 Both Ends No 1,522
7.62 5-1/4 Beco Pipe 1.000 45.0 6.75 Both Ends No 2,921
7.62 5-1/4 Beco Pipe 0.750 45.0 6.75 Both Ends No 2,740
7.62 5-1/4 Beco Pipe 1.000 35.0 6.75 Both Ends No 2,223
7.62 5-1/4 Beco Pipe 0.750 35.0 6.75 Both Ends No 1,963
7.62 5-1/4 Beco Starter Pipe 1.000 32.9 6.75 Both Ends No 2,408
8.62 6 Beco Pipe 0.906 50.0 7.75 Both Ends No 5,410
8.62 6 Beco Starter Pipe 1.000 32.9 7.75 Both Ends No 2,879
10.75 8 Beco Pipe 1.000 6.83 9.25 Both Ends No 1,306
Wrench Flats
Dia (inch) Thread Pin/Box Comp Wall Thick (inch) Length (feet) inch Flat loc Hex (inch) Wgt (lbs.)
7.00 4-1/2 Beco Pipe 1.000 40.0 5.75 Both Ends No 2,394
7.62 5-1/4 Beco Pipe 1.000 40.0 6.75 Both Ends No 3,223
8.62 6 Beco Pipe 1.000 40.0 7.75 Both Ends No 4,595
10.75 8 Beco Pipe 1.000 40.0 9.25 Both Ends No 5,471
Wrench Flats
Dia (inch) Thread Pin/Box Comp Wall Thick (inch) Length (feet) inch Flat loc Hex (inch) Wgt (lbs.)
3.00 2 Z Pipe 0.250 13.0 2.25 Both Ends No 104
3.00 2 Z Pipe 0.500 13.0 2.25 Both Ends No 176
3.00 2 Z Starter Pipe 0.250 8.8 2.25 Both Ends No 73
3.00 2 Z Pin, 2-3/8 API reg box Starter Pipe 0.500 8.0 2.25 Both Ends No 132
3.00 2-3/8 API reg Pipe 0.254 10.0 2.25 Both Ends No 79
3.50 2-1/2 Z Pipe 0.254 13.0 2.74 Both Ends No 126
3.50 2-1/2 Z Pin, 2-3/8 API reg box Starter Pipe 0.368 8.86 1.75 Pin Only No 106
3.50 2-1/2 Z Pin, 3-1/2 API reg box Starter Pipe 0.368 9.0 2.74 Both Ends No 110
4.00 2-1/2 Z Pipe 0.250 13.0 3.00 Both Ends No 148
4.00 2-1/2 Z Starter Pipe 0.250 8.0 3.00 Both Ends No 95
4.00 2-1/2 Z Pin, 3-1/2 API reg box Pipe 0.500 13.0 3.00 Both Ends No 249
4.00 2-1/2 Z Pin, 3-1/2 API reg box Starter Pipe 0.500 9.0 3.00 Both Ends No 88
Wrench Flats
Dia (inch) Thread Pin/Box Comp Wall Thick (inch) Length (feet) inch Flat loc Hex (inch) Wgt (lbs.)
4.50 3-1/2 API reg Pipe 0.37 25.0 3.50 Pin Only 4.00 412
4.50 3-1/2 API reg Starter Pipe 0.625 21.6 3.50 Both Ends No 597
5.50 4 FH Pipe 0.415 25.0 4.50 Both Ends 5.00 733
7.62 4-1/2 Beco Pipe 0.500 20.0 6.00 Both Ends 6.50 923
7.62 4-1/2 Beco Pipe 0.500 30.0 6.00 Both Ends 6.50 1,297
7.62 4-1/2 Beco Pipe 0.500 25.0 6.00 Both Ends 6.50 1,110
7.62 5-1/4 Beco Pipe 0.750 8.0 6.75 Both Ends No 626
7.62 5-1/4 Beco Starter Pipe 0.750 25.0 6.75 Both Ends No 1,524
Wrench Flats
Dia (inch) Thread Pin/Box Comp Wall Thick (inch) Length (feet) inch Flat loc Hex (inch) Wgt (lbs.)
7.62 5-1/4 Beco Pipe 2.000 35.0 6.62 Both Ends No 3,830
8.62 6 Beco Pipe 2.000 35.0 7.75 Both Ends No 4,996
10.75 8 Beco Pipe 1.000 35.0 9.25 Both Ends No 4,511
12.75 8 Beco Pipe 1.000 35.0 10.50 Both Ends No 5,026
13.38 10 Beco Pipe 1.000 35.0 11.38 Both Ends No 5,264
Wrench Flats
Dia (inch) Thread Pin/Box Comp Wall Thick (inch) Length (feet) inch Flat loc Hex (inch) Wgt (lbs.)
3.50 2-3/8 IF Pipe 0.368 20.0 2.75 Box Only No 229
4.50 2-7/8 IF Pipe 0.337 20.0 3.50 Box Only No 344
4.50 3-1/2 API reg Pipe 0.337 20.0 3.50 Box Only No 344
Dia (inch) Thread Pin/Box Wall Thick (inch) Length (feet) Circ Grip (inch) Wgt (lbs.)
3.50 2-3/8 API reg 1/6 6.15 2-3/8 57
4.50 3-1/2 API reg 1/4 6.15 3-3/4 104
Std Lengths Dia (inch) Thread Pin/Box Wall Thick (inch) Length (feet) Wrench Flats Wgt (lbs.)
ROC F6 = 4.0m 3 2-3/8 API reg 1/4 13.12 No flats 106
ROC L8 = 6.0m 3 2-3/8 API reg 1/4 16.40 No flats 128
ROC 830 = 4.0m
ROC 860 = 5.0m 3-1/2 2-3/8 API reg 1/4 13.12 No flats 133
ROC 936 = 6.0m 3-1/2 2-3/8 API reg 1/4 16.40 No flats 164
ROC F6 = 4.0m 3-1/2 2-3/8 API reg 1/4 19.68 No flats 184
ROC L6 = 5.0m or 4m (check conf of the rig) 3-1/2 2-3/8 API reg 1/3 19.68 No flats 280
ROC L8 = 6.0m 4 2-7/8 API reg 1/4 13.12 No flats 152
ROC 830 = 4.0m 4 2-7/8 API reg 1/4 16.40 No flats 197
ROC 860 = 5.0m 4 2-7/8 API reg 1/4 19.68 No flats 232
ROC 936 = 6.0m 4-1/2 3-1/2 API reg 1/4 19.68 No flats 254
4-1/2 3-1/2 API reg 1/3 19.68 No flats 350
5-1/2 4-1/2 API reg 1/3 19.68 No flats 442
Wrench Flats
Dia (inch) Thread Pin/Box Wall Thick (inch) Length (feet) inch Flat location Wgt (lbs.)
2-3/8 RD 50-6 1/6 9.8 2-1/6 Both Ends 51
3 RD 50-6 1/6 4.9 2-5/8 Both Ends 35
3 RD 50-6 1/6 6.6 2-5/8 Both Ends 42
3 RD 50-6 1/6 9.8 2-5/8 Both Ends 57
3 2-3/8 API reg 1/6 3.3 2-5/8 Both Ends 24
3 2-3/8 API reg 1/6 4.9 2-5/8 Both Ends 33
3 2-3/8 API reg 1/6 6.6 2-5/8 Both Ends 40
3 2-3/8 API reg 1/6 9.8 2-5/8 Both Ends 55
3 2-3/8 API reg 1/4 3.3 2-5/8 Both Ends 31
3 2-3/8 API reg 1/4 4.9 2-5/8 Both Ends 44
3 2-3/8 API reg 1/4 6.6 2-5/8 Both Ends 55
3 2-3/8 API reg 1/4 9.8 2-5/8 Both Ends 79
3-1/2 2-3/8 API reg 1/6 3.3 2-5/8 Both Ends 31
3-1/2 2-3/8 API reg 1/6 4.9 2-5/8 Both Ends 40
3-1/2 2-3/8 API reg 1/6 6.6 2-5/8 Both Ends 51
3-1/2 2-3/8 API reg 1/6 9.8 2-5/8 Both Ends 68
3-1/2 2-3/8 API reg 1/4 3.3 2-5/8 Both Ends 37
3-1/2 2-3/8 API reg 1/4 4.9 2-5/8 Both Ends 53
3-1/2 2-3/8 API reg 1/4 6.6 2-5/8 Both Ends 66
3-1/2 2-3/8 API reg 1/4 9.8 2-5/8 Both Ends 95
3-1/2 2-7/8 API reg 1/4 9.8 2-5/8 Both Ends 95
4 2-7/8 API reg 1/4 9.8 3 Both Ends 115
4-1/2 3-1/2 API reg 1/6 9.8 3-3/4 Both Ends 101
4-1/2 3-1/2 API reg 1/4 3.3 3-3/4 Both Ends 59
4-1/2 3-1/2 API reg 1/4 4.9 3-3/4 Both Ends 77
4-1/2 3-1/2 API reg 1/4 6.6 3-3/4 Both Ends 97
4-1/2 3-1/2 API reg 1/4 9.8 3-3/4 Both Ends 132
4-1/2 3-1/2 API reg 1/4 14.8 3-3/4 Both Ends 189
4-1/2 3-1/2 API reg 1/4 19.7 3-3/4 Both Ends 244
4-1/2 3-1/2 API reg 1/3 3.3 3-3/4 Both Ends 65
4-1/2 3-1/2 API reg 1/3 6.6 3-3/4 Both Ends 119
4-1/2 3-1/2 API reg 1/3 9.8 3-3/4 Both Ends 170
4-1/2 3-1/2 API reg 1/3 19.7 3-3/4 Both Ends 295
3-1/2 2-3/8 IF 1/4 6.6 2-5/8 Both Ends 68
3-1/2 2-3/8 IF 1/6 9.8 2-5/8 Both Ends 68
4-1/2 2-7/8 IF 1/4 19.7 3-3/4 Both Ends 247


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