Superior Grade Material DCDMA Standard Wireline Core Drilling Rods
BWL NWL HWL PWL
Sinocoredrill Wireline Drill Rods are made of high quality carbon
seamless steel tubes with high mechanical properties. All wireline
drill rods are fully heat treated, case hardened at two ends till
50 to 55 HRC hardness to protect thread connection and increases
its’ wear resistance and drill rod life.
General characteristic:
Good concentricity
High precision
Well wear resistance
Long drilling life
- Cold-drawn seamless steel tubing of very high mechanical
resistance, a steel of exceptional performance unequaled on the
market.
- This exceptional mechanical resistance is on the full length of the
rods.
- Straightness and Hoop Stress controlled tubing.
- Surface treatment on pin threads to prevent galling.
Sizes: AQ, BQ, NQ, HQ, PQ, NT, HT, PT, AW, BW, NW, AWJ, BWJ, NWJ
Length: 1.0M, 1.5M, 2.0M, 3.0M etc
Q series wireline drill rods specifications:
Size | O.D | I.D | Weight (kg/3m) | Desc |
| AQ | 44.5mm | 34.9mm | 14.0 | Entire length heat treated, case hardened at two ends |
| BQ | 55.6mm | 46.1mm | 18.0 |
| NQ | 69.9mm | 60.3mm | 23.5 |
| HQ | 88.9mm | 77.8mm | 34.5 |
| PQ | 114.3mm | 101.6mm | 52.2 |
Performance Rating:
| Name | Rated Pullback | Rated Torque | Threaded connection tightening torque ,Nm | Maximum torque Nm | Maximum drilling depth m |
| | Min Max | |
| BWL | 130kN | 800Nm | 405 550 | 450 | 1500 |
| NWL | 250 kN | 2000 Nm | 600 750 | 600 | 1500 |
| HWL | 250 kN | 2000 Nm | 1010 1350 | 1080 | 1200 |
| PWL | 450kN | 4000Nm | 1010 3500 | 2950 | 900 |
Mechanical Properties:
| Name | Tensile Strength: | Yield Strength : | Elongation
(%): | Tooth angle | Hardness |
| BWL | 990 Mpa | 870 Mpa | 17% | 29º | HRC28-32 |
| NWL | 983 Mpa | 895 Mpa | 19% | 29º | HRC28-32 |
| HWL | 960 Mpa | 855 Mpa | 18.5% | 29º | HRC28-32 |
| PWL | 1050 Mpa | 930 Mpa | 14.5% | 29º | HRC28-32 |
Wireline core drilling useage steps:
1. To mount drill rods, bits, and core barrel etc drilling tools with
a diamond drill rig.
2. To utilize a diamond drill bit attached to the end of drill rods
to cut a cylindrical core of solid rock.
3. To retrieve the core samples to the surface by retracting the
winch cable which located on the top end of the core barrel,
lowered inside the rod string.
4. To remove the core sample from the core barrel, break it into
small pieces to make it fit into the sample trays and catalogue.
