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Drill Pipe

Secoroc Drill Pipe catalog page
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.
Secoroc tubes

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

Technical Spec:

Tubing J-55Tool Joints, Adapters
Tensile Strength (RM) min.75,000 PSISurface Hardness58-62 HRC
Yield Strength (ReH) min.55,000 PSIDepth0.080"
Elongation (A5) min.15%Core Hardness32-36 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-80Tool Joints, Adapters
Tensile Strength (RM) min.100,000 PSISurface Hardness58-62 HRC
Yield Strength (ReH) min.80,000 PSIDepth0.080"
Elongation (A5) min.18%Core Hardness32-36 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:
FeatureHot Rolled TubingCold Drawn Tubing
OvalityIncluded in the tolerance for the wallIncluded in the tolerance for the wall
Wall Thickness+/- 10-12%+/- 3-4%
StraightnessN/A0.012"/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 in action
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 joints, inside
Friction Welded:
  • Friction welding gives much stronger joints, compared with electrode welding, due to less risk of impure joints.

DTH Hammer with DTH Bit

Hammer with Rotary Bit

Rotary HeadThe power unit that rotates the drill string.
Spindle AdapterAlso 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 PipeAvailable in a variety of lengths, diameters, wall thicknesses, and thread configurations.
Starter PipeSimilar 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 AdapterUsually 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 BitThe percussive mechanism that drills the hole. Available in a wide range of diameters and styles depending on the application.
Rotary (Tricone) BitMay 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*CompWall Thick (inch)Length (feet)inchFlat locHex (inch)Wgt (lbs.)
3.502-3/8 API regPipe0.50030.03.5Both EndsNo491
3.502-3/8 API regPipe0.33725.02.5Both EndsNo315
3.502-3/8 API regStarter Pipe0.75021.02.5Both EndsNo485
3.502-3/8 API regStarter Pipe0.50026.63.5Both EndsNo441
4.002-7/8 API regPipe0.33730.03.5Pin Only3.50489
4.002-7/8 API regPipe0.75030.03.5Pin Only3.50751
4.002-7/8 API regPipe0.33725.03.5Pin Only3.50421
4.002-7/8 API regPipe0.33725.03.0Both EndsNo410
4.002-7/8 API regPipe0.33725.03.5Both EndsNo410
4.002-7/8 API regStarter Pipe0.75026.63.5Pin OnlyNo520
4.002-7/8 API regStarter Pipe0.33721.03.0Both EndsNo313
4.002-7/8 API regStarter Pipe0.33721.03.5Both EndsNo313
4.002-7/8 API regStarter Pipe0.75021.03.5Both EndsNo388
4.502-7/8 IFPipe0.33725.03.5Pin Only4.00412
4.502-7/8 IFStarter Pipe0.62521.03.5Both EndsNo584
4.502-7/8 IFPipe0.33730.03.5Pin Only4.00489
4.502-7/8 IFPipe0.33720.03.5Box OnlyNo344
4.503-1/2 API regPipe0.62525.03.5Pin Only4.00833
4.503-1/2 API regPipe0.33730.03.5Pin Only4.00489
4.503-1/2 API regPipe0.75030.03.5Pin Only4.00989
4.503-1/2 API regPipe0.50030.03.5Pin Only4.00667
4.503-1/2 API regPipe0.43035.03.5Pin Only4.00760
4.503-1/2 API regStarter Pipe0.75026.63.5Pin OnlyNo855
4.503-1/2 IFPipe0.33720.03.5Box OnlyNo344
5.003-1/2 API regPipe0.37525.03.5Pin Only4.00562
5.003-1/2 API regPipe0.50025.03.5Pin Only4.00630
5.003-1/2 API regPipe0.75025.03.5Pin Only4.00907
5.003-1/2 API regPipe0.50030.03.5Pin Only4.00756
5.003-1/2 API regPipe0.33730.03.5Pin Only4.00837
5.003-1/2 API regPipe0.75030.03.5Pin Only4.001,081
5.003-1/2 API regPipe0.50035.03.5Pin Only4.00874
5.003-1/2 API regPipe0.75035.03.5Pin Only4.001,264
5.003-1/2 API regStarter Pipe0.75026.63.5Both EndsNo980
5.003-1/2 API regStarter Pipe0.37521.63.5Both EndsNo485
5.003-1/2 API regStarter Pipe0.75029.63.5Both EndsNo1,086
5.003-1/2 API regStarter Pipe0.75031.63.5Both EndsNo1,159
5.003-1/2 BecoPipe0.75030.03.5Pin Only4.621,097
5.003-1/2 BecoPipe0.50030.03.5Pin Only4.62773
5.003-1/2 BecoPipe0.50035.03.5Pin Only4.62892
5.003-1/2 BecoPipe0.50025.03.5Pin Only4.62654
5.003-1/2 BecoStarter Pipe0.50026.63.5Pin OnlyNo573
5.003-1/2 BecoStarter Pipe0.50021.63.5Pin OnlyNo551
5.503-1/2 BecoPipe0.41525.04.5Both Ends5.00733
5.503-1/2 BecoPipe0.41530.04.5Both Ends5.00866
5.503-1/2 BecoPipe0.75030.04.5Both Ends5.001,240
5.503-1/2 BecoPipe0.75025.04.5Both Ends5.001,044
5.503-1/2 BecoPipe0.75035.04.5Both Ends5.001,434
5.503-1/2 BecoStarter Pipe0.41525.84.5Both EndsNo685
5.503-1/2 BecoStarter Pipe0.41520.84.5Both EndsNo621
6.254 BecoPipe0.50025.04.5Both Ends5.00868
6.254 BecoPipe0.50030.04.5Both Ends5.001,013
6.254 BecoPipe0.75030.04.5Both Ends5.001,447
6.254 BecoPipe0.50035.04.5Both Ends5.00993
6.254 BecoPipe0.75035.04.5Both Ends5.001,678
6.254 BecoStarter Pipe0.50025.84.5Both EndsNo899
6.254 BecoStarter Pipe0.50020.84.5Both EndsNo747
7.004-1/2 BecoPipe0.75025.05.0Pin Only6.001,410
7.004-1/2 BecoPipe0.75030.05.0Pin Only6.001,672
7.004-1/2 BecoPipe0.75035.05.0Pin Only6.001,945
7.004-1/2 BecoPipe0.50030.05.0Pin Only6.001,174
7.004-1/2 BecoPipe0.50025.05.0Both Ends6.001,042
7.004-1/2 BecoPipe0.50030.05.0Both Ends6.001,200
7.004-1/2 BecoPipe0.50035.05.0Both Ends6.001,372
7.004-1/2 BecoPipe0.75030.06.0Both Ends6.501,703
7.004-1/2 BecoPipe1.00025.06.0Both Ends6.501,443
7.004-1/2 BecoStarter Pipe0.50025.75.0Pin EndNo1,205
7.625-1/4 BecoPipe0.75025.06.0Both Ends6.501,571
7.625-1/4 BecoPipe0.87525.05.0Pin Only6.501,709
7.625-1/4 BecoPipe0.75030.06.0Both Ends6.501,857
7.625-1/4 BecoPipe0.75030.06.75Both EndsNo1,877
7.625-1/4 BecoPipe1.00030.06.0Both Ends6.502,220
7.004-1/2 BecoPipe0.62535.05.75Both EndsNo1,619
7.004-1/2 BecoPipe1.00035.05.75Both EndsNo2,077
7.004-1/2 BecoPipe0.75035.05.75Both EndsNo1,945
7.004-1/2 BecoStarter Pipe1.00030.35.75Both EndsNo1,760
7.004-1/2 BecoStarter Pipe0.75029.05.75Both EndsNo1,652
7.005-1/4 BecoPipe0.62535.06.50Both EndsNo1,619
7.005-1/4 BecoStarter Pipe0.62531.96.50Both EndsNo1,478
7.005-1/4 BecoStarter Pipe0.62532.96.50Both EndsNo1,522
7.625-1/4 BecoPipe1.00045.06.75Both EndsNo2,921
7.625-1/4 BecoPipe0.75045.06.75Both EndsNo2,740
7.625-1/4 BecoPipe1.00035.06.75Both EndsNo2,223
7.625-1/4 BecoPipe0.75035.06.75Both EndsNo1,963
7.625-1/4 BecoStarter Pipe1.00032.96.75Both EndsNo2,408
8.626 BecoPipe0.90650.07.75Both EndsNo5,410
8.626 BecoStarter Pipe1.00032.97.75Both EndsNo2,879
10.758 BecoPipe1.0006.839.25Both EndsNo1,306
Wrench Flats
Dia (inch)Thread Pin/BoxCompWall Thick (inch)Length (feet)inchFlat locHex (inch)Wgt (lbs.)
7.004-1/2 BecoPipe1.00040.05.75Both EndsNo2,394
7.625-1/4 BecoPipe1.00040.06.75Both EndsNo3,223
8.626 BecoPipe1.00040.07.75Both EndsNo4,595
10.758 BecoPipe1.00040.09.25Both EndsNo5,471
Wrench Flats
Dia (inch)Thread Pin/BoxCompWall Thick (inch)Length (feet)inchFlat locHex (inch)Wgt (lbs.)
3.002 ZPipe0.25013.02.25Both EndsNo104
3.002 ZPipe0.50013.02.25Both EndsNo176
3.002 ZStarter Pipe0.2508.82.25Both EndsNo73
3.002 Z Pin, 2-3/8 API reg boxStarter Pipe0.5008.02.25Both EndsNo132
3.002-3/8 API regPipe0.25410.02.25Both EndsNo79
3.502-1/2 ZPipe0.25413.02.74Both EndsNo126
3.502-1/2 Z Pin, 2-3/8 API reg boxStarter Pipe0.3688.861.75Pin OnlyNo106
3.502-1/2 Z Pin, 3-1/2 API reg boxStarter Pipe0.3689.02.74Both EndsNo110
4.002-1/2 ZPipe0.25013.03.00Both EndsNo148
4.002-1/2 ZStarter Pipe0.2508.03.00Both EndsNo95
4.002-1/2 Z Pin, 3-1/2 API reg boxPipe0.50013.03.00Both EndsNo249
4.002-1/2 Z Pin, 3-1/2 API reg boxStarter Pipe0.5009.03.00Both EndsNo88
Wrench Flats
Dia (inch)Thread Pin/BoxCompWall Thick (inch)Length (feet)inchFlat locHex (inch)Wgt (lbs.)
4.503-1/2 API regPipe0.3725.03.50Pin Only4.00412
4.503-1/2 API regStarter Pipe0.62521.63.50Both EndsNo597
5.504 FHPipe0.41525.04.50Both Ends5.00733
7.624-1/2 BecoPipe0.50020.06.00Both Ends6.50923
7.624-1/2 BecoPipe0.50030.06.00Both Ends6.501,297
7.624-1/2 BecoPipe0.50025.06.00Both Ends6.501,110
7.625-1/4 BecoPipe0.7508.06.75Both EndsNo626
7.625-1/4 BecoStarter Pipe0.75025.06.75Both EndsNo1,524
Wrench Flats
Dia (inch)Thread Pin/BoxCompWall Thick (inch)Length (feet)inchFlat locHex (inch)Wgt (lbs.)
7.625-1/4 BecoPipe2.00035.06.62Both EndsNo3,830
8.626 BecoPipe2.00035.07.75Both EndsNo4,996
10.758 BecoPipe1.00035.09.25Both EndsNo4,511
12.758 BecoPipe1.00035.010.50Both EndsNo5,026
13.3810 BecoPipe1.00035.011.38Both EndsNo5,264
Wrench Flats
Dia (inch)Thread Pin/BoxCompWall Thick (inch)Length (feet)inchFlat locHex (inch)Wgt (lbs.)
3.502-3/8 IFPipe0.36820.02.75Box OnlyNo229
4.502-7/8 IFPipe0.33720.03.50Box OnlyNo344
4.503-1/2 API regPipe0.33720.03.50Box OnlyNo344
Dia (inch)Thread Pin/BoxWall Thick (inch)Length (feet)Circ Grip (inch)Wgt (lbs.)
3.502-3/8 API reg1/66.152-3/857
4.503-1/2 API reg1/46.153-3/4104
Std LengthsDia (inch)Thread Pin/BoxWall Thick (inch)Length (feet)Wrench FlatsWgt (lbs.)
ROC F6 = 4.0m32-3/8 API reg1/413.12No flats106
ROC L8 = 6.0m32-3/8 API reg1/416.40No flats128
ROC 830 = 4.0m
ROC 860 = 5.0m3-1/22-3/8 API reg1/413.12No flats133
ROC 936 = 6.0m3-1/22-3/8 API reg1/416.40No flats164
ROC F6 = 4.0m3-1/22-3/8 API reg1/419.68No flats184
ROC L6 = 5.0m or 4m (check conf of the rig)3-1/22-3/8 API reg1/319.68No flats280
ROC L8 = 6.0m42-7/8 API reg1/413.12No flats152
ROC 830 = 4.0m42-7/8 API reg1/416.40No flats197
ROC 860 = 5.0m42-7/8 API reg1/419.68No flats232
ROC 936 = 6.0m4-1/23-1/2 API reg1/419.68No flats254
4-1/23-1/2 API reg1/319.68No flats350
5-1/24-1/2 API reg1/319.68No flats442
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