Link Latch technology eliminates the chance of mis-latches and partial latches by connecting the latches together with links. The links have the added benefit of increasing the mechanical advantage of retraction, reducing the chance of stuck tubes. The latches have also increased in size to reduce the high wear common with older spring latch systems.

Boart Longyear’s overshots are an integral part of the Q™ Wireline system. Once the inner-tube is full of core, the overshot is lowered to the bottom of the hole. Its heavy-duty lifting dogs grab a secure hold at the top of the inner-tube assembly.

The Ezy-Lock sleeve provides a quick, one-handed rotation of the sleeve 90° to lock the overshot lifting dogs to the spearpoint and protects against accidental release.  When combined with the use of the safety pin, the overshot minimizes the chances of accidentally dropping the inner tube assembly during handling.

The Ezy-Lock overshot features upgraded components, heavy duty lifting dogs, two compression springs for improved durability and a new re-usable press-fit pivot-pin, eliminating peening in the field for easy lifting dog maintenance.

The Ezy-Lock overshot has an upgraded threaded connection between the jar staff and overshot head for improved strength. The jar staff itself is high-strength alloy steel with an increased diameter and fail-safe stop to reduce the chance of fatigue failures.