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)
  • Direct Push (Geoprobe)

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


  • 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)


We are committed to being your preferred drilling contractor by consistently providing the best service.

Contact us today