Boart Longyear Launches Roller Latch™ Quick Pump-In™ Overshot

SALT LAKE CITY, Utah — December 30, 2021 — Since Boart Longyear introduced the Q™ Wireline system in 1966, retrieving the inner tube from the core barrel has been handled the same way: an overshot with lifting dogs (spring-loaded hooked “fingers”) is lowered or pumped into the hole until it snaps over a pivoting spearhead mechanism affixed to the inner tube assembly.  In 2018, we launched the Roller Latch™ Overshot to solve the problem for surface drillers.  Today, we are excited to announce the availability of the Roller Latch™ Quick Pump-In™ Overshot, specifically developed for underground and up-hole drilling.

Drillers regularly deal with several challenges when retrieving a core barrel, partial trips, false indications, and spearhead failures. Resetting the landing indication is a costly process and, it increases the opportunity for injury.

The new overshot applies our experience with Roller Latch head assemblies to create a system that eliminates spearheads and lifting dogs entirely. The spearhead is replaced by a socket adapter that accepts the overshot itself. Rollers securely latch into an internal groove in the adapter.

The new overshot is designed for self-flushing and easy cleaning by flushing through the porting provided. With a brand-new pump-in cable release system, the Roller Latch will eliminate shear pins and increase the reliability of wireline recovery.

The Roller Latch family of in-hole tools includes a surface treatment that provides excellent corrosion resistance and reduces wear on the overshot. The spearhead assembly pivots in the center making it twice as strong and less likely to break when pulling the tube out.

“We’re very excited about this solution,” said Chris Drenth, Product Manager, “it provides underground drillers access to safer, more productive wireline technology.”


About Boart Longyear

Established in 1890, Boart Longyear is the world’s leading provider of drilling services, orebody data collection, and drilling products. With a focus in mining and exploration activities, including copper, gold, nickel, zinc, and uranium, the company also operates in the energy, oil sands exploration, and environmental sectors.

The Drilling Services division provides drilling expertise including diamond coring, reverse circulation, large diameter rotary, and sonic drilling. Applications include exploration, production, mine dewatering, water supply drilling, and pump services.

The Geological Data Services division utilizes scanning technology and down-hole instrumentation to capture geological data from drilled core and chip samples. This valuable data gives mining companies the ability to make timely and intelligent decisions.

The Products division includes research and development, global manufacturing, marketing, and equipment service capabilities. The division holds hundreds of patents, covering drill rigs, exploration and production tooling and consumables as well as genuine parts for customers worldwide.

Boart Longyear is headquartered in Salt Lake City, Utah, USA, and listed on the Australian Securities Exchange in Sydney, Australia (ASX:BLY). More information about Boart Longyear can be found at

View all Press Releases ››

Boart Longyear
Simple Share Buttons