Overshots
Boart Longyear's™ overshots are an integral part of the Genuine Q™ Wireline System. Once the inner tube is full of core, the overshot is lowered to the bottom of the hole, and its heavy-duty lifting dogs grab a secure hold at the top of the inner tube assembly.
For maximum productivity in underground or pump-in applications, Boart Longyear offers the new Quick Pump-in™ overshot. The new Quick Pump-in overshot provides significantly improved pump-in rates with dual pump-in lip-seals. In addition, it incorporates the proven/reliable, patented Landing Indicator bushing as an optional bypass valve feature. When drilling flat or slightly declined, the landing indicator bushing and valve ball will provide a pressure spike upon landing and allow fluid to bypass the overshot when pulling from the hole, significantly improving retraction rates and eliminating the need to refill the hole with drilling fluid.
Conversion Kits
Boart Longyear has set up conversion kits to assist our customers in converting over, instead of buying a completely new system. There are also kits available to convert between surface and underground applications.
EZY lock overshot
As part of Boart Longyear's commitment to safety on the drill site, we offer the patented EZY-Lock overshot for use with the Genuine Q Wireline System. The safety and productivity features included in the design provide highly reliable core barrel retrieval for all surface exploration applications.
The EZY Lock is available for above-ground Genuine Q Wireline Systems in sizes B to P.
Standard Boart Longyear overshot features:
- Heavy duty lifting dogs and compression spring
- Threaded connection between jar staff and overshot head
- High strength alloy steel jar staff with increased diameter and fail safe stop
- Locking sleeve prevents release of inner tube
- Optional dry hole lowering kit
