Casing Advance Systems

Drill it. Case it. One pass.

Drill King’s Casing Advance Systems drill the hole and advance casing at the same time, through unstable overburden into solid bedrock. No hole collapse, less trip time, and a stable, cased borehole in a single run, with casing up to 36″ (914 mm) in diameter.

Wing King

4½" – 36" casing (115 – 914 mm)

Cased holes through the toughest overburden. Cam-actuated wings open on rotation to cut a hole slightly larger than the casing OD, so the pipe follows the bit down without restriction.

Simple 2 & 3 wing cam-sliding design

Loose overburden into solid bedrock, large-diameter piling

Permanent or retrieved

Ring Bit

4" – 24" casing (102 – 610 mm)

Precision casing through overburden. A heavy-duty ring bit, casing shoe and locking pilot bit form one oversized cutting face that pulls the casing down behind it.

Pilot bit locks into the ring bit via locking lugs

Foundation piling, anchoring, water well, geothermal, site investigation

Standard and Pass-Thru, for drilling on through the ring with no tool change

Borehole Stability

Prevents collapse in fractured rock, loose gravels and unconsolidated overburden by casing as you drill, not after.

One-Pass Efficiency

Eliminates the separate drilling and casing stages required by conventional methods, reducing project timelines and cost.

Flexible Casing Retention

Choose permanent (left-in-hole) or retrieved casing depending on project and engineering requirements.

Compatible With Your Fleet

Designed to pair with Drill King's full range of DTH hammers and most industry-standard casing pipe.

Not sure which system fits your ground conditions? Our technical team can match the right configuration to your formation, casing spec and rig setup. Ask for a recommendation.

Foundation & Pile Drilling

Stable, cased holes through fill and overburden for building, bridge and infrastructure foundations.

Anchoring & Underpinning

Accurate cased holes for ground anchors and underpinning where loose ground would otherwise collapse.

Water Well Drilling

Case through unconsolidated overburden to reach the aquifer and bedrock in a single pass.

Geothermal Wells

Keep boreholes open through loose surface layers for residential and large-scale geothermal installations.

Mineral Exploration

Get through difficult overburden quickly so drilling can continue into the target formation.

Site Investigation

Reliable cased boreholes for geotechnical investigation in mixed and unstable ground.

What is a Casing Advance System?

A specialized drilling solution that drills the hole and advances casing at the same time. It maintains borehole stability and prevents collapse in unstable formations.

What's the difference between Wing King and Ring Bit systems?

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.

What applications are best suited for Casing Advance Systems?

Foundation drilling, water well drilling, geothermal drilling and mineral exploration are the most common applications: anywhere unstable overburden sits above bedrock.

Can casing be retrieved after drilling?

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.

Can Drill King customize a system for my project?

Yes. Both systems can be customized for non-standard casing or extra hard-facing treatments in highly abrasive ground.

Does Drill King offer technical support for installation?

Yes. Drill King’s technical department offers in-depth support for installing, operating and maintaining Casing Advance Systems, tailored to your drilling requirements.

Tell us your casing size, ground conditions and application, and we’ll recommend the right Wing King or Ring Bit configuration.