Drill King's Casing Advance Systems (CAS) simultaneously drill and advance casing through unstable overburden into solid bedrock — eliminating hole collapse, cutting trip time, and giving you a stable, cased borehole in a single run. Available as casing up to 36” (914mm) in diameter.
A Casing Advance System combines the drilling process with the casing process into one operation. A specialized casing drill bit, positioned in front of a conventional DTH air hammer, drills the hole while simultaneously driving casing down behind it — cutting a hole slightly larger than the casing OD so the pipe follows the bit down without restriction.
This matters most in fractured rock, loose gravels, sand, and other unconsolidated ground where an open, uncased hole would collapse before a conventional casing or grouting operation could be completed. By casing and drilling in the same pass, DKI’s CAS keeps the borehole stable from surface to bedrock, reduces overall drilling time, and lowers project cost versus multi-stage methods.
Cased holes through the toughest overburden. A simple, robust 2 & 3 wing cam-sliding design covering casing OD…
Precision casing through overburden. Heavy Duty Ring Bit, Casing Shoe, and locking Pilot Bit form one oversized cutting…
Prevents collapse in fractured rock, loose gravels, and unconsolidated overburden by casing as you drill, not after.
Eliminates the separate drilling and casing stages required by conventional methods, reducing project timelines.
Choose permanent (left-in-hole) or retrieved casing depending on project and engineering requirements.
Designed to pair with Drill King's full range of DTH hammers and most industry-standard casing pipe.
DKI offers two distinct Casing Advance System designs, each suited to different ground conditions, casing sizes, and project requirements. Both are available for permanent (left-in-hole) or retrieved (pulled-out) casing, and both can be customized for non-standard casing or extra hard-facing treatments in highly abrasive ground.
| Item Info | Wing King | Ring Bit (Standard / Pass-Thru) |
|---|---|---|
| Mechanism4.5"–36", large-diameter piling | Cam-actuated wings open on rotation | Pilot bit locks into ring bit via locking lugs-actuated 2 & 3 wing design; widest range in the DKI casing line. |
| Casing Size Range | 4.5” – 36” (115 – 914mm)Bit — Standard | 4” – 24” (102 – 610mm) |
| Best Suited To | Loose overburden into solid bedrock, large diameter piling | Foundation piling, anchoring, water well, geothermal, site investigation |
| Casing Retention | Permanent or retrieved | Permanent or retrieved |
| Notable Variant | Simple 2 & 3 wing configurations | Pass-Thru allows drilling on through ring — no tool change |
Not sure which system fits your ground conditions? Our technical team can match the right CAS configuration to your formation, casing spec, and rig setup — contact us for a project-specific recommendation.
A specialized drilling solution that simultaneously advances casing and drills the hole in challenging ground conditions, maintaining borehole stability and preventing collapse in unstable formations.
Foundation drilling, water well drilling, geothermal drilling, and mineral exploration are among the most common applications, anywhere unstable overburden sits above bedrock.
Wing King uses cam-actuated wings that open on rotation and suits larger casing sizes up to 36”. Ring Bit uses a locking pilot bit inside a ring bit for sizes up to 24”, with a Pass-Thru variant for drilling on through into bedrock without a tool change.
Yes. Both Wing King and Ring Bit systems are available in permanent (left-in-hole) and retrieved (pulled-out) configurations depending on your project’s engineering requirements.
Yes. Drill King’s technical department offers in-depth support for installing, operating, and maintaining Casing Advance Systems, tailored to your specific drilling requirements.
Tell us your casing size, ground conditions, and application, and our technical team will recommend the right Wing King or Ring Bit configuration — built to perform, engineered to last, made in the USA.
Built tough enough for the unpredictability of job sites, our equipment minimizes costly downtime and re-drills.
Every hole counts, and our tools are built to keep penetration rates high even in unpredictable, mixed formations.
Engineered for open-pit and underground alike, our tools lower per-meter drilling costs without sacrificing performance.
Engineered for the rigors of well-site conditions, our hammers and bits extend service life while reducing per-foot drilling costs.
Less downtime, fewer bit changes, more material moved. That's the Drill King difference for quarry operators who can't afford to slow down.
From residential wells to large-scale geothermal fields, our tools are trusted to get the job done right the first time
