- Directional Drilling Contractors, LLC.
 - Offers directional drilling, measurement while drilling, gamma and gyro survey services, and down hole motor repair. - Horizontal Drilling International (1)
- International Directional Services
- Supplier and manufacturer of services, rentals, and sales of tools for directional drilling services.
- LMR Drilling UK Ltd
- Horizontal directional drilling company that offers turnkey solutions to pipelines, pipeline crossings, outfalls, and landfalls.
- Longbore
- Provides horizontal drilling and power engineering applied to remediation wells and underground utilities installation.
- Pacific Boring, Inc.
- Providing horizontal drilling and pipe jacking services to the Western states.
- Snyder Construction Co.
- Services include boring, drilling, and tunneling.
- Southeast Directional Drilling
- Providing horizontal directional drilling services throughout the world.
- Suffolk Water Connections, Inc.
- Underground utility construction company specialising in directional drilling and installing underground utilities, including water lines, conduit, and telecommunication lines.
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