DIRECTIONAL DRILLING
Boart Longyear is a full-service directional drilling provider. Our extensive technical experience and directional capabilities can be used to drill paste holes and methane vent wells, pre-collar for raise bores and water wells, and on occasion for mineral exploration. Learn more ››

SELF-CONTAINED DRILLING FLUIDS
Boart Longyear uses a self-contained drilling fluids system where, as the drilling fluids return to the surface, they are collected in a tank where the cuttings settle and the drilling fluid is then reused in the drilling process. Self-contained drilling fluids tanks ensure proper mixture and maintenance of drilling fluids and save money by eliminating the need for a pit. Not needing a pit for drilling fluids is environmentally safe and reduces the drill pad size, may require fewer disturbance permits, and eliminates the need to back fill.

AIR HAMMER DRILLING
Air hammer drilling forces compressed air through the drill pipe to drive an air hammer bit at the bottom of the borehole. The pneumatic bit rapidly strikes the rock, pulverizing it. Air drilling doesn’t seal off the borehole, which allows for higher producing aquifers than mud rotary.

DUAL ROTARY
Dual Rotary maintains borehole stability by advancing an outer casing, which allows advancement in the most challenging ground conditions where other overburden drilling systems are unsuccessful. Once the casing is in place, well installation can be accomplished in a controlled environment.

DUAL TUBE FLOODED REVERSE
This unique drilling process uses dedicated dual wall drill pipe and drilling fluid along with the injection of air in order to drill large diameter holes. Using Dual Tube Flooded Reverse (DTFR), fluids always circulate inside the dual tube pipe and can’t escape into the formations. Instead of maintaining fluids at the surface and circulating throughout the wellbore, DTFR generally drills with the borehole fluids at their naturally occurring level.

REVERSE CIRCULATION
This method of drilling utilizes a dual tube drill string. Drill fluid or air flows down the inner annulus of the drill string, collects cuttings at the bit face, and travels back up the center of the string. If using fluid instead of air, the fluid is collected on the surface where it is filtered and recirculated in the drilling process. Learn more ››