Drilling with Casing

Increase efficiency and mitigate drilling hazards with simultaneous drilling and casing

Simultaneous drilling and casing operations accelerate well construction, reduce risk exposure, and mitigate potential hazards. Using our drilling-with-casing (DwC) or drilling-with-liner (DwL) systems, you can drill, ream, run, set, and cement your casing or liners in a single trip. Our DwC systems are compatible with our OverDrive casing-running and drilling system for added benefits.

Download the brochure on dDwC™ directional drilling with casing

Casing Drill Bits

Drill in any environment to the planned depth

Our unique Defyer® bit series provides custom solutions for DwC operations in virtually all conditions. With temperature ratings up to 400°F (204°C), the bits enable casing drilling across soft, medium and hard rock formations. And, they can be drilled out with the planned BHA, which eliminates the need for dedicated drillout trips.

The bit design includes a selectable blade count and configurable cutter size to suit your formation type and application. Mounted on the face of the tool, the polycrystalline-diamond-compact cutters maximize drilling efficiency and durability.

See the specifications for our drillable DPA casing bits

See the specifications for our drillable DT casing bits

drill bit

Directional Drilling With Casing

Drill in any direction to TD using a retrievable BHA

Our dDwC™ directional drilling-with-casing system enables retrieving your bottomhole assembly (BHA) to replace damaged or worn components or to recover advanced systems—without pulling the entire casing string. 


Read more about our recoverable dDwC systems

Drilling with Casing Accessories

Further enhance drilling and casing performance

We offer various enhancements—including our rubber-lined DwC centralizer, torque ring, and float collar—to complement our DwC and DwL services. 

Our rubber-lined DwC centralizer provides superior performance and extreme durability throughout the casing-drilling operation. The lightweight centralizer makes installation simple, reduces friction and casing wear, and optimizes fluid bypass. Our easy-to-install torque ring substantially increases the torque rating of buttress, STC, or LTC connections. Our field-proven float collar offers both backpressure capability and drillability.

See the specifications for our CleanReam™ premium bit

See the specifications for our DwC nonrotating centralizer

non rotating centralizer

Get More Details on Drilling with Casing

Simultaneous drilling and casing operations accelerate well construction, reduce risk, and mitigate potential hazards. To learn more about how our systems can add value to your operation, please complete the contact form below. One of our specialists will be in touch.