PQ Surface Drilling Overshot
PEERCHEER offers compact PQ Ezy lock overshot for use with PQ/PQ3 core barrel. PQ EZY lock overshot is designed to protect against accidental release of PQ/PQ3 inner tube assembly. PQ Ezy Lock Overshot is ideal for surface applications when hoisting above ground.
PQ Surface Drilling Overshot Features:
• Ezy Lock Sleeve provides a quick, one-handed rotation of the sleeve to lock the lifting dogs.
• Quick Release Safety Pin locks the overshot head to the spearhead point.
• Threaded connection between jar staff and overshot head.
• High strength alloy steel jar staff with increased diameter and fail safe stop.
PQ Surface Drilling Overshot Features:
• Ezy Lock Sleeve provides a quick, one-handed rotation of the sleeve to lock the lifting dogs.
• Quick Release Safety Pin locks the overshot head to the spearhead point.
• Threaded connection between jar staff and overshot head.
• High strength alloy steel jar staff with increased diameter and fail safe stop.
Product Details
Parameter
PQ Surface Drilling Overshot Standard Parts:
1-PQ Overshot Eye Bolt
2-PQ Overshot Cable Swivel Collar
3-PQ Overshot Thrust Bearing
4-PQ Overshot Castle Nut
5-PQ Overshot Cotter Pin
6-PQ Overshot Grease Fitting
7-PQ Overshot Cable Swivel Body
8-PQ Overshot Jar Staff
9-PQ Overshot Jar Tube
10-PQ Overshot Hex Nut
11-PQ Overshot Washer
12-PQ Overshot Cap
13-PQ Overshot Spring
14-PQ Overshot Sleeve
15-PQ Overshot Compression Spring
16-PQ Overshot Ball
17-PQ Overshot Head
18-PQ Overshot Compression Spring
19-PQ Overshot Lifting Dog
20-PQ Overshot Plain Pin
21-PQ Overshot Spring Pin
22-PQ Overshot Locking Pin
23-PQ Overshot Set Screw
24-PQ Overshot Sleeve
25-PQ Overshot Locking Sleeve
NOTE：
(1)PQ Overshot with roller bar type is also available
PQ Surface Drilling Overshot
| PQ Nonimal Parameter | mm | Inches |
| PQ Hole Diameter(approx.) | 122.6 | 4.827 |
| PQ Core Diameter(approx.) | 85.0 | 3.346 |
| PQ Core Bit Set OD(approx.) | 122.0 | 4.803 |
| PQ Core Bit Set ID(approx.) | 85.0 | 3.346 |
| PQ Reaming Shell Set OD(approx.) | 122.6 | 4.827 |
