PQ3 Overshot Assembly Core Barrel Diamond Drilling
PEERCHEER offers standard PQ3 PWL-3 triple tube core barrel for use with PQ/PHD/PT rods. PQ3 overshot assembly core barrel utilizes a third tube called an inner tube liner or split tube. PQ3 overshot assembly core barrel is commonly used in surface drilling conditions when drilling coal, clay bearing or highly fractured formations. PQ3 core barrel only available in surface configurations and is available for application in standard DCDMA P size hole. It consists of the PQ3 head assembly , PQ3 inner tube components and PQ3 outer tube components.
Product Details
Parameter
PQ3 overshot assembly core barrel Standard configuration:
1-PQ3 Head Assembly
2-PQ3 Pump Out Adapter
3-PQ3 Piston Plug
4-PQ3 O Ring
5-PQ3 Core Ejection Piston
6-PQ3 Split tube
7-PQ3 Inner Tube
8-PQ3 Stop Ring
9-PQ3 Core Lifter
10-PQ3 Core Lifter Case
11-PQ3 Locking Coupling
12-PQ3 Adapter Coupling
13-PQ3 Landing Ring
14-PQ3 Outer Tube
15-PQ3 Inner Tube Stabilizer
16-PQ3 Thread Protector
NOTE：
(1)PQ3 core bit and reaming shell are not included
(2) 1.5m/5ft and 3m/10ft PQ3 core barrels are available
(3)The newest MKII spearhead PQ3 core barrel is also available
PQ3 overshot assembly core barrel Parameters Table
| PQ3 Nonimal Parameter | mm | Inches |
| PQ3 Hole Diameter(approx.) | 122.6 | 4.827 |
| PQ3 Core Diameter(approx.) | 83.0 | 3.268 |
| PQ3 Core Bit Set OD(approx.) | 122.0 | 4.803 |
| PQ3 Core Bit Set ID(approx.) | 83.0 | 3.268 |
| PQ3 Reaming Shell Set OD(approx.) | 122.6 | 4.827 |
| PQ3 Outer Tube OD | 117.5 | 4.626 |
| PQ3 Outer Tube ID | 103.2 | 4.063 |
| PQ3 Inner Tube OD | 95.6 | 3.764 |
| PQ3 Inner Tube ID | 88.9 | 3.500 |
| PQ3 Split Tube OD | 88.5 | 3.484 |
| PQ3 Split Tube ID | 86.0 | 3.386 |
