Drilling Services Products Geological Data Careers Company Investors Search for: ROTARY DRILLING For holes from 15 cm to 152 cm (6 to 60 in) for dewatering, freeze holes, paste holes, mineral exploration, geothermal, oil and gas pre-collars, cavern wells, injection/extraction holes, water test holes, or monitor wells, you need safe, straight, hassle-free meters from a drilling contractor with the right technical expertise and compliant and reliable rigs and equipment. APPLICATION Surface Drilling Water Services CONTACT AN EXPERT Safe and Compliant You need safe and compliant rotary drilling services contractors that employ the most progressive, effective safety programs, utilize field-designed safety innovations, and cultivate a safety culture where every employee knows safety is the number one priority. World-class safety and training programs promote employee empowerment and engagement at all levels. Programs that identify and mitigate risks for a strong safety culture and easily mirror and incorporate your safety programs is why Boart Longyear is ISO certified. Local Talent, Global Strength You need local work forces and a drilling services contractor with a solid reputation for operating responsibly in the communities in which you operate. Global means you have access to the diverse Boart Longyear workforce, cross-regional and cross-functional services, expertise and equipment, and global metrics and reporting. Consistent, Reliable Service To successfully accomplish your next small or large rotary drilling project, hire Boart Longyear for our technical expertise, experience, global service and supply facilities and measurable performance data. We deliver solutions, integrity and results through our consistent and reliable service. Diverse Fleet of Rigs and Equipment By continuously investing in developing and designing efficient and safe rotary rigs and equipment, you can count on Boart Longyear for industry-leading depths, productivity and up-time. In-house engineers design and build state-of-the-art rotary drill rigs that feature state-of-the-art technology like auto-drilling and hands-free rod handling. Boart Longyear equipment is designed for safety and field-tested for compliance and reliability. SAFETY EXCELLENCE Boart Longyear is committed to ongoing investments in industry-leading Environmental, Health and Safety programs. LEARN MORE Solutions. Integrity. Results. ROTARY DRILLING METHODS AND CAPABILITIES 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 ›› ROTARY DRILLING SERVICES FLEET Rigs Pull Back Drillrod Size Hole Size Angle Capable DH I (Modified Driltech) 90,000 Lbs 5.5" & 7" 6 3/4" - 22" No DH III (Modified Driltech) 90,000 Lbs 5.5" & 7" 6 3/4" - 22" No T130XD (Schramm) 130,000 Lbs 5.5" & 7" 6 3/4" - 26" Yes LR™140 (Boart Longyear) 140,000 Lbs 5.5" & 7" 6 3/4" - 38" Yes T145 (Schramm) 145,000 Lbs 5.5" & 7" 6 3/4" 20" No LR™200 (Boart Longyear) 200,000 Lbs 5.5" & 7" 6 3/4" - 31" No LR™300 (Boart Longyear) 300,000 Lbs 5.5", 7" & 9 5/8" 6 3/4" - 60" No LR™500 (Boart Longyear) 500,000 Lbs 6 5/8" 8 3/4" - 60" No LR™700 (Boart Longyear) 700,000 Lbs 6 5/8" 8 3/4" - 60" No Dependent on hole size, casing size and casing wall thickness (call for quotes accordingly) Ready to take the next step? Submit a Request for Tender to have Boart Longyear review your project and submit a bid to supply our drilling services. REQUEST FOR TENDER IMAGE GALLERY DOWNLOADS Rotary Drilling Services Overview English (PDF) EXPLORE MORE SAFETY INNOVATION Continuous improvement processes are boosting productivity at Boart Lon… SAFETY INNOVATION Keeping new starts safe as the market rebounds CASE STUDY Drilling Services Achieves Sound Abatement with Electric Rotary Rig CASE STUDY Unique drilling method used to develop water wells FIELD EXPERTS How to Drill Large-Diameter Holes Through Lost Circulation Formations In… RELATED SERVICES Dewatering Drilling Services Directional Drilling Surface Coring CONTACT US CONTACT AN EXPERT BE THE FIRST TO KNOW Type your email below to subscribe to monthly updates on new products, services, best practices, and events. 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