Drill Pipe

Enttu's Drill Pipe drill pipes are specialized DTH (Down-the-Hole) drill pipes designed for water well drilling, mining, and geothermal drilling scenarios. They feature high tensile strength, corrosion resistance, and universal compatibility with standard DTH hammers and bits, ensuring stable performance in medium-to-hard rock formations.

DRILL PIPE SERIES – KEY ADVANTAGES
Full Size Range
50 – 127 mm OD, 3 m to 12 m length, API REG/IF or square/taper thread → one-stop for any DTH, water-well or auger project.
89mm (3.5-inch) Model: Tailored for shallow water well drilling (depth ≤ 100m). Its compact structure makes it ideal for residential water supply, small-scale agricultural irrigation, and rural community water well projects, balancing efficiency and cost-effectiveness.
114mm (4.5-inch) Model: The most versatile size in our lineup, suitable for medium-depth water wells (100–300m). It also adapts to light mining blast hole drilling, eliminating the need for separate drill pipe procurement for multi-scenario operations.
127mm (5-inch) Model: Engineered for deep water well drilling (300–500m) and geothermal exploration. Enhanced wall thickness (8–10mm) strengthens high-pressure resistance, ensuring stable performance in high-stress underground environments.
140mm (5.5-inch) Model: Specialized for ultra-deep water wells (>500m) and hard rock formations. Its reinforced load-bearing structure withstands long-term drilling impact and torque, reducing wear and replacement frequency in harsh working conditions.
 2. Two Performance Tiers
API Heavy-Wall: 6.5-12 mm, E75-X95, Box-Pin, deep-hole high torque.
Economic Light-Wall: 4-6.5 mm, Q235B, plug-in taper, fast, low-cost
Quick-Change Economy
Square/taper options install in seconds, no rig tongs, 20 % lighter, 15 % cheaper.
Global Standards
API 5DP, NC26-NC38, 2-3/8" to 3-1/2" REG threads – same couplings worldwide.
Custom Length & Grade
R1/R2/R3, S135 on request, any OD/WT within 48 h quotation.
One series, every hole – from shallow irrigation to 1 000 m geotherma

Material

High-quality low-carbon or alloy steel for balanced strength and toughness
Full traceability from certified billet to finished pipe

Manufacturing Process

Friction-welded joints: pipe body and tool-joint forged as one piece, 100 % ultrasonic inspected
Internal-external upset (IEU) design increases tensile strength and fatigue life
Precision CNC threading ensures perfect hand-tight make-up and repeatable torque

Performance & Reliability

Wall thickness 4 – 12 mm, length 1 – 9 m on request; strict ovality ≤ 0.5 %
Working torque up to 12 000 N·m; safety factor ≥ 2.5
Surface shot-blasted + black or copperized finish for maximum thread anti-galling

Quality Assurance

Each pipe hydro-tested to 1.5 × working pressure
Full set of mill certs, UT & MT reports provided with shipment

Sustainability & Cost

Light-wall options reduce rig weight and fuel consumption
Modular Box-Pin or quick-connect ends allow rapid on-site make-up and re-use

Tailored to your project: We customize design and raw-material specifications to match your exact application—consult our sales team for a fast, accurate quotation.

Contact our team today to get a quote – we’ll ensure you get the right power unit to maximize your drilling efficiency.

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