Blasthole Drill Pipe, 7" OD, DML Rod, 35ft Shoulder to Shoulder, 4-1/2" BECO Box x Pin for Altas Copco DML Rig
Blasthole Drill Pipe, 7" outer diameter , DML Rod, 35ft Shoulder to Shoulder, 4-1/2" BECO Box x Pin for Altas Copco DML Rig
Blasthole Drill Pipe, 7" OD, DML Rod, 35ft Shoulder to Shoulder, 4-1/2" BECO Box x Pin for Altas Copco DML Rig
Blasthole Pipe, 7" OD, DML Rod, 35ft Shoulder to Shoulder, 4-1/2" BECO Box x Pin (for Altas Copco DML Rig) – Qty: 4
| Drill Pipes Specifications | ||||
| Outer diameter | Thread | Wall thickness | Length | |
| mm | inch | mm | mm | |
| 60 | 2 3/8 | FEDP (Failing connection) Mayhew Junior Mayhew Regular 2 3/8" API REG 2 7/8" API REG 3 1/2" API REG 4 1/2" API REG 6 5/8" API REG 2 3/8" API IF 2 7/8" API IF 3 1/2" API IF 4 1/2" API IF 3 1/2" BECO 4 1/2" BECO 5 1/4" BECO 6" BECO 8" BECO 10" BECO 12" BECO |
4 | 1000-6000 |
| 6.3 | ||||
| 76 | 3 | 4 | 1000-6000 | |
| 6.3 | ||||
| 89 | 3 1/2 | 4 | 1000-9600 | |
| 6.3 | ||||
| 8.8 | ||||
| 102 | 4 | 6.3 | 4000-9600 | |
| 8.8 | ||||
| 114 | 4 1/2 | 6.3 | 3000-12600 | |
| 12.5 | ||||
| 127 | 5 | 6.3 | 3000-12600 | |
| 12.5 | ||||
| 15 | ||||
| 133 | 5 1/4 | 6.3 | 3000-12600 | |
| 12.5 | ||||
| 15 | ||||
| 140 | 5 1/2 | 8.8 | 3000-12600 | |
| 12.5 | ||||
| 19 | ||||
| 152 | 6 | 8.8 | 3000-12600 | |
| 12.5 | ||||
| 19 | ||||
| 168 | 6 5/8 | 8.8 | 3000-12600 | |
| 12.5 | ||||
| 19 | ||||
| 178 | 7 | 9.6 | 3000-12600 | |
| 12.5 | ||||
| 19 | ||||
| 200 | 7 7/8 | 9.6 | 3000-12600 | |
| 12.5 | ||||
| 19 | ||||
| 203 | 8 | 9.6 | 3000-12600 | |
| 12.5 | ||||
| 19 | ||||
| Roschen Drill Pipe make by Friction Welding. | ||||
| Any special thread of Drill Pipe is available by request. | ||||
BECO = Bucyrus Erie Company. Thread form, pitch, height, and taper being within limits, pitch cone (pitch diameter) is generally verified by use of precision ground plug and ring gauges. Nominal standoff for plug gauge to box (female thread) seal face is flush (0.000 inch). Nominal standoff ring gauge to pin (male thread) seal face is (unlike API Spec 7 RSC connections) 0.665 inch. Gauges available from PMC Lonestar. I regularly send my BECO gauges to Lonestar for calibration and verification against their masters. I do not work for Lonestar.
Yes it does have a basic sketch of a BECO screw threaded connection, but the other data given about the BECO screw thread is less than I have stated in my original post.
I have contacted some major manufacturers of API thread gages in USA and they do not have the information either.
The information that I have to date is the following:
Connection Sizes: 3-1/2" to 8"
2 Threads per Inch
3" Taper per Foot
60° included flank angle
The next piece of basic information for which I search is a list of standard BECO screw thread sizes. This should be the easiest to find.
What will be more difficult to find will be the tolerances used for this screw thread. It may be that because of the steep taper of the BECO screw thread, any male and female will fit together if made reasonably close to the basic size.
Best regards,
Phiger Leo
Direct Line: 0086-137-6419 5009
WeChat/WhatsApp:: +86-137-6419 5009
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