DRILLING TECHNIQUES
Walker Drilling utilizes a wide range of drilling methodologies, testing and sampling techniques, and installation types to meet every client’s need.
With a range of access options, we are well equipped to tackle most projects in most locations.
The following is a list of the various methodologies and techniques we employ to get your project done to your specifications:
Drilling Methodologies
- Wireline diamond drilling AQ, BQ, NQ, HQ, PQ
- Double tube
- Triple tube
- Complete Environmental drilling capabilities
- Soil removal services
- Decontamination services
- Overcoring
- Soil Coring
- Air Coring
- Angle drilling
- 45-90° holes possible
- Hollow stem (2 ¼" to 12 ¼" O.D.) and Solid stem augers (4 ¼" O.D.)
- Mud rotary drilling (Tri-Cone soil and button) B, N, H, P sizes
- Wash boring (casing advancer NW, HW and casing BW,NW,HW,PW)
- DTH drilling (4" to 8" hammers, 4" to 10" button bits)
Access Options
- Land - truck/track/skid mounted rigs
- Marine - Large or small barge work, depending on size of machine required
- Heli-portable rigs (D25, D50, CS1000, Duralite 800N)
- Man portable rigs (Tripod/Winkie core drill)
- Skid-mounted rigs (D25, D50)
- Half Tower drilling capabilities on most rigs for low clearances
Installations
- Standard monitoring wells
- Flushmount
- Monument mount
- Piezometers
- Vibration sensors (vibrating wire piezometers)
- Vapor wells
- Slope inclinometers
Sampling Techniques
- Split Spoon sampling
- Standard Penetration Tests (SPT)
- Cone Penetration Tests
- Shear Vane Test
- Shelby Tube Sampling
- Permeability (packer) tests
- Pressure meter testing/overburden packer testing
- Piston Sampling
Other Techniques and Methods
- Hand Hammer
- Hydrovac/Air lance Vac (for daylighting or cuttings removal)
- Concrete Coring (4" to 12") and Concrete Saw cuts
- Excavations, including test pits
- Silt fence installations
- Use of blow-out preventers (BOPs)
