The 4E rule of engineering
Every project we design follows Safety, Economy, Aesthetics and Universality, in that order — a measurable roadmap instead of routine practice.
You are in the right place
Horizontal
drilling
specialists
Advanced technical infrastructure,
extensive machine fleet
Onshore / Offshore
Your reliable partner in HDD projects
Call us now
Let us engineer it for you
Solutions for infrastructure projects from 2 mm to 2000 mm in diameter.
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Where we work
Wherever you need horizontal drilling, we are with you
Power · Natural gas · Sewerage
Telecoms · Potable water and drainage
Engineering
Success takes more than coincidence
We model the project in software and share the results before work begins.
Technology
Horizontal drilling and boring technologies
Start by choosing the drilling method that fits your purpose.
Hard ground
Rock drilling & immense power
A difference in infrastructure
Get ahead of your competitors with effective solutions
Deltek
We put your infrastructure underground without touching the surface.
Horizontal directional drilling (HDD), auger boring and pipe jacking, trenchless pipe bursting and smart undergrounding consultancy. For diameters from 2 mm to 2000 mm, serving all of Türkiye from our Istanbul and Izmir offices.
196,210metresTotal bore length
28,136hoursWorking hours
324Satisfied partners
1,275tonnesFleet capacity
Services
All services →Four methods, one team.
Horizontal Directional Drilling
HDDWe install natural gas, potable water, sewer, power and fibre-optic lines underground. Locating and electronic targeting systems track the bore path with high precision.
Pipe Jacking / Auger Boring
Auger BoringThe method for installing large-diameter steel pipes underground. Pipe jacking, auger boring and microtunnelling save both cost and time.
Trenchless Pipe Bursting
Pipe BurstingWe replace old lines with new pipes without excavation — and, if you wish, in larger diameters.
Smart Undergrounding Consultancy
Smart UndergroundingMore than 20 years of experience in infrastructure planning. Innovative underground solutions bring projects to life that once seemed impossible.
Over 20 yearsInternationalField experience
About us
A multidisciplinary team in trenchless infrastructure.
We bring different engineering disciplines together under one roof, drawing on years of construction and infrastructure experience — and we remove unnecessary capacity and extra cost to build partnerships that last.
Deltek is a trenchless contractor providing horizontal drilling, horizontal directional drilling (HDD), pipe jacking, auger boring and microtunnelling and trenchless pipe bursting across Türkiye from its Istanbul and Izmir offices. We install natural gas, water, sewer, power and fibre-optic lines under rivers, motorways, railways and city streets without open-cut excavation.
A smart undergrounding approach
Our engineers introduced “smart undergrounding” to the literature. For every line they work out the most reasonable, most economical solution before the work begins.
A fleet for every scale
Up to 250 tonnes in horizontal directional drilling and 800 tonnes in auger boring. We prepare the feasibility report for machine and crew selection free of charge.
Guides
Technology section →What is horizontal drilling and how is it done?
Our technical pages explain horizontal drilling, trenchless boring and horizontal directional drilling; HDD rigs, drill rods, steering heads and reamers, locating systems and drilling fluid. We recommend reading them before choosing a trenchless method.
- Trenchless BoringTrenchless boring applications: water and sewer, gas and power, fibre-optic lines. Rig characteristics, planning and the trenchless boring sector in Türkiye.
- What Is Microtunnelling?Microtunnelling: pipe jacking with a remotely controlled closed-face machine. How it works, slurry and EPB machines, laser guidance, when it is chosen.
- What Is Auger Boring?Auger boring: a steel casing is jacked from a shaft while a head on a helical auger cuts the ground ahead. Steps, guided auger boring, suitable ground, FAQ.
- HDD Construction MethodPilot bore, reaming and pullback explained step by step with site photographs.
- HDD Drilling RigRig classes by thrust, pullback and torque, and how to choose the right machine.
- Drilling FluidThe six functions of bentonite-based drilling mud and how it is prepared for each soil type.
Blog
All articles →Latest articles.
08 November 2026
How Is a River Crossing Built? HDD Pipeline Crossings Step by Step
How a pipeline is taken under a river by HDD: investigation, profile design, entry and exit angles, depth of cover, frac-out risk, reaming and pullback.
08 November 2026
HDD or Open-Cut Trenching? A Cost and Time Comparison
HDD or open-cut trenching? Direct and indirect costs of both methods, duration, risk and a decision table showing which is more economical where.
08 November 2026
Geotechnical Investigation for HDD: How Ground Type Decides Method and Tooling
Why a geotechnical investigation is essential for HDD: how drill head, reamer, drilling fluid and risk change in clay, sand, gravel and rock.
Get in touch with any questions.
0850 888 3585