HTWA 1.5m/ 2m/ 3m Thin Wall Drill Rod Pipe

HTWA is a standard lightweight and optimized upgraded version of thin-walled rope core drill pipe, manufactured in accordance with the DCDMA international standard. It has an outer diameter of 92.2mm and a wall thickness of 4.5mm. It is made from 4130/ZT950 chromium-molybdenum alloy seamless steel pipes and undergoes overall quenching and tempering heat treatment. The structure of the drill pipe body and the joint are optimized, both ends are forged and reinforced, and the threads are subjected to high-frequency surface quenching. It achieves excellent wear resistance and anti-sticking properties, as well as good thread sealing performance. On the basis of maintaining full specification compatibility and interchangeability with HTW, HTWH, HQ drill bits, expanders, and inner pipe assemblies, it weighs 12% less than conventional HTW, with a single-meter weight of 9.8kg. There are three standard lengths available: 1.5m, 2m, and 3m. It not only has superior torsional performance compared to traditional HQ thick-walled drill pipes, but also improves the mud flow cross-sectional area by 16%, has excellent slag removal and drill bit cooling effects, and can significantly reduce the torque load of the drilling rig and the cost of field transportation. It can perfectly replace HQ thick-walled drill pipes and is suitable for large and medium-sized hydraulic rope core drilling rigs. It is recommended for use in 2000 meters or less of medium-depth hole complete hard rock stratum mineral exploration operations.

1.Lightweight and reduced load: 12% lighter than the standard HTW, the drilling rig's rotation torque is smaller, fuel consumption is lower, and manual transportation in mountainous areas is more effortless.

2.Excellent large-diameter circulation: The inner diameter is superior to that of HTW and HQ thick-walled rods. The mud flow is greater, and the complete formation discharge is smooth, the drill bit has good heat dissipation, and the problem of clogging and stopping the drill is reduced.

3.National standard universal: DCDMA standard threads. The original HTW/HQ complete set of drilling tools can be directly matched without the need to replace the inner pipe or the fishing assembly.

4.Cost-effective choice: For regular complete formations, no heavy-duty HTWH is needed. HTWA has sufficient strength, and the procurement and usage costs are lower than the thickened HTWH. It is more economical for medium and deep holes.

Large-scale metal mineral prospecting, coalfield deep exploration, highway & railway geotechnical investigation, water conservancy engineering drilling, geothermal well drilling, large-diameter horizontal underground coring, tailing deposit geological survey.

Q1: Solid HQ drill pipe is overweight, resulting in heavy rig load & high field transportation cost?
A: HTWA is 11% lighter than HQ rod to cut rig torque, fuel cost and onsite handling expense effectively.

Q2: Standard HTW is over-weighted with high cost for intact formation medium-deep drilling?
A: HTWA lightweight design satisfies drilling up to 1800m in intact rock with lower purchase cost than regular HTW.

Q3: Small ID of HQ leads to poor mud circulation and frequent bit balling?
A: Enlarged inner bore boosts mud flow by 16% for better cuttings discharge and bit cooling to avoid bit balling downtime.

Q4: Worried about incompatibility with existing HTW/HQ core accessories?
A: DCDMA standard threads enable full interchange with original HTW & HQ bits and barrel assemblies.

Q5: Heavy-duty HTWH brings redundant strength & poor cost-performance in intact strata?
A: HTWA balances strength and weight, competent for intact hard rock at much lower cost than reinforced HTWH.