Deep Continuous Core Sampling with Precision & Control
Geoprobe 8150LS Sonic Drilling
When projects demand deep, continuous core sampling with minimal disturbance, sonic drilling provides a level of control that conventional methods cannot match. O’Keefe Drilling operates the Geoprobe® 8150LS, a full-size sonic drill rig capable of advancing casing and collecting continuous core samples in excess of 300 feet across complex subsurface conditions.
Provide target depth, formation details, and project scope for a detailed proposal.
HOW SONIC DRILLING WORKS
What Is Sonic Drilling?
Sonic drilling uses high-frequency vibration to advance casing and core barrels through soil and rock formations. The vibratory energy reduces friction between casing and formation, allowing continuous sampling while maintaining borehole integrity.
Compared to conventional auger or rotary drilling, sonic drilling often provides:
- Continuous, high-quality core recovery
- Reduced sample disturbance
- Improved borehole stability
- Minimal reliance on drilling fluids
- Reduced investigation-derived waste (IDW) in many conditions
These characteristics make sonic drilling particularly effective in mixed formations and environmentally sensitive sites.
APPLICATION CONDITIONS
When Sonic Is the Right Choice
Sonic drilling is commonly selected when projects require:
- Continuous core sampling through multiple geologic formations
- Deep environmental site investigation
- Minimal cross-contamination risk
- Stable boreholes in unconsolidated materials
- Reduced drilling fluid introduction
- Improved recovery in glacial till, fill, or mixed overburden
Where traditional methods may struggle with borehole collapse or inconsistent recovery, sonic drilling maintains formation control and sample quality.
SONIC RIG PLATFORM
8150LS Platform Capabilities
The Geoprobe 8150LS is a full-size sonic platform developed to meet the demands of larger, more complex drilling programs.
Depth Capacity: Continuous sampling and casing advancement beyond 300 feet, project dependent
Formation Capability:
- Consolidated materials, including rock
- Glacial till
- Mixed overburden
- Backfill and rubble
- Variable or unstable formations
The 8150LS delivers greater sonic head power and platform stability than smaller rigs, allowing deeper advancement and improved performance in demanding conditions.
Continuous Casing Advancement & Core Control
The ability to continuously advance casing while retrieving core is one of the primary advantages of sonic drilling.
This approach:
- Protects borehole integrity
- Reduces collapse risk in unconsolidated soils
- Improves sample continuity
- Minimizes exposure of open boreholes
- Supports accurate environmental and geotechnical interpretation
Controlled advancement helps maintain alignment and depth accuracy throughout the drilling process.
Environmental & Investigation Applications
The 8150LS supports a wide range of programs, including:
- Environmental site investigations
- Deep monitoring well installation
- Contaminated site characterization
- Geotechnical investigations
- Industrial and municipal projects
- Complex subsurface assessments
Sonic drilling is often preferred when minimal disturbance and improved sample recovery are required.
Safety, Efficiency & Field Performance
Every component of the 8150LS platform is designed to support safe and efficient operations.
We focus on:
- Maintaining borehole stability
- Protecting core integrity
- Minimizing surface disturbance
- Coordinating closely with engineering and environmental teams
- Executing drilling programs with precision and control
The combination of experienced crews and advanced sonic technology allows us to deliver dependable results in complex field conditions.
Frequently Asked Questions
How is sonic drilling different from auger or rotary drilling?
Sonic drilling uses high-frequency vibration to advance casing and retrieve continuous core samples, often providing improved recovery and borehole stability in difficult formations.
How deep can the Geoprobe 8150LS drill?
The 8150LS can continuously sample and advance casing beyond 300 feet, depending on site conditions and project requirements.
Is sonic drilling appropriate for contaminated sites?
Yes. Sonic drilling reduces reliance on drilling fluids and can minimize cross-contamination risk, making it suitable for many environmental investigations.
Can sonic drilling penetrate rock?
Yes. The 8150LS is capable of advancing through consolidated formations, including rock, as well as mixed and unconsolidated materials.
When should sonic drilling be selected?
Sonic drilling is often selected when continuous sampling, deep investigation, improved recovery, and formation stability are priorities.
O'Keefe Drilling
Related Services
Water Well Drilling
Caisson Drilling
Geotechnical Drilling
Request a quote
Planning a Sonic Drilling Program?
If your project requires deep continuous sampling or controlled casing advancement, we are ready to review your requirements and provide a detailed bid.
Share target depths, formation characteristics, and project objectives to begin the proposal process.