CGE WUXI 70.1*5mm ZT950 Steel NQ Wireline Drill Rod Pipe

NQ rope drill pipe is the core tool for core sampling drilling in geological exploration. It connects the drilling rig with the diamond drill bit, transmits torque and drilling pressure, and provides a passage for the inner pipe assembly. Compared with global mainstream products, the drill pipe body specifications are 70.1*5mm, suitable for medium to deep hole drilling up to 1500m. It is widely used in geological exploration, engineering geological investigation, deep mining drilling in mines, mineral exploration, etc.

Pipe body: Seamless pipe made of high-strength ZT950 steel, overall quenching and tempering, straightness ≤ 1mm/m, high coaxiality, strong resistance to bending and torsion.

Thread: Thread quenched, anti-sticking, wear-resistant, easy to tighten and loosen.

Joint: Self-connecting overall structure, no welding, high strength, good stability.

Matching tools: NQ diamond drill bit, inner pipe assembly, fishing tool, inner chamber of the winch, puller, etc. 

High operational efficiency: Without the core drilling mode, it eliminates the need for repeated lifting and disassembly of the drill pipe. Compared to conventional drill pipes, the overall efficiency is significantly improved, and the advantage becomes more pronounced as the hole depth increases.

Good core integrity: The drill pipe column remains in the hole throughout the process, without disturbing the formation and the core. This effectively ensures a high core recovery rate and meets the strict requirements of geological sampling and mineral analysis.

Strong load-bearing capacity: The ZT950 material combination with a reasonable wall thickness design provides excellent resistance to twisting and fracture, enabling it to stably handle high-load conditions such as medium-depth holes, hard rock, and fractured formations within 1800 meters.

Long service life and low cost: Standard threads + reinforced heat treatment result in slow wear, less sticking and deformation, extending the service life, reducing the frequency of component replacements, and lowering the overall project cost.

High versatility: Compatible with mainstream NQ series drilling rigs and drilling accessories, this one machine can be used for multiple purposes, covering various scenarios such as geology, mining, engineering, wells, and geothermal energy.

Geological exploration, deep drilling, coal fields / oil and gas, engineering surveying, hydrology / geothermal energy

Applicable drilling tools: NQ double-tube coring assembly, NQ diamond drill bit, NQ enlarger, NQ retrieval tool

Drilling rig compatibility: XY-44, XY-5, CSK-1000 and other medium and deep-hole core drilling rigs

Length selection: For shallow holes (≤500 m), choose 1.5 m; for deep holes (≥500 m), choose 3.0 m, to enhance efficiency

1.Always use thread lubricant: It can reduce surface wear during the threading and disassembly process, metal powder fills the contact area between the threads, improving the sealing performance of the drill rod and enhancing the connection rigidity of the threads.

2. Check for wear: When the outer diameter of the joint or the pipe body wears more than 1mm (for the QA series, it is 1.5mm), replacement is necessary.

3. Prevent thread deformation: Use wrench for threading and disassembly of the drill rod to avoid using a sledgehammer to strike; it is necessary to straighten the drill rod and gently interlock to prevent thread damage and avoid causing sticking or leakage.

4. Avoid oversize construction: During construction, strictly follow the process gradation.

5. Do not use for hole opening: When using drill rod to open a hole.

6. Choose the appropriate drilling pressure: Prevent the drill rod from bending and deforming due to excessive drilling pressure.

Q1: For traditional conventional drill pipe deep-hole drilling, the process of pulling and setting the drill pipe takes a long time and the construction efficiency is low. Can the NQ rope core extraction drill pipe solve this problem?
A: Yes. This drill pipe is equipped with a rope core extraction system. There is no need to pull the entire drill pipe out of the hole. Only the inner tube for core extraction can be retrieved through the retrieval device. This significantly reduces the frequency of pulling and setting, and compared to conventional drill pipes, it can save more than 60% of auxiliary working hours, significantly improving the overall drilling efficiency.

Q2: During deep-hole operations, frequent pulling of the drill pipe, repeated disassembly of the drill pipe threads delays the project schedule. How can this drill pipe improve the situation?
A: The NQ drill pipe adopts standard 1:22 conical precision threads. The disassembly is smooth and the alignment is accurate. In addition, the rope core extraction process significantly reduces the number of drill pipe disassembly and assembly, effectively avoiding the loss of time caused by frequent disassembly, and is suitable for continuous construction of medium and deep holes of several kilometers.

Q3: When the strata are fractured and the rock layer is soft, the core is prone to be lost and the take rate does not meet the standards. Can this product improve the situation?
A: Yes. Relying on the structural advantages of rope core extraction, the core can be quickly collected into the inner tube and retrieved in time, reducing the loss of the core in the hole, preventing erosion, and collapse. Under normal circumstances, the core take rate can reach over 95%, meeting the sampling standards for geological exploration.

Q4: During deep-hole drilling, rock core blockage is prone to occur, which affects sampling and drilling. How can this be solved?
A: The NQ drill pipe has a reasonable inner diameter size and the matching core extraction assembly has good fluidity. Combined with the dedicated retrieval tools, the core can be quickly handled when blocked, and the fault can be resolved without raising the drill pipe, avoiding long-term drill pipe stoppage.

Q5: The drill pipe threads are prone to wear, stick, and get stuck, and are replaced frequently, resulting in high usage costs. Has this drill pipe been optimized?
A: Yes. The rod body and the joint are made of 4130 alloy material. The joint threads are surface hardened for hardening treatment. The hardness difference between the male and female threads forms a reasonable hardness difference, effectively preventing sticking, and resisting wear. Under normal circumstances, the core take rate can reach over 95%, meeting the sampling standards for geological exploration.