| Customization: | Available |
|---|---|
| Type: | Wireline Drill Rod |
| Usage: | Core Drilling |
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some more details about drill rods in the rock coring and drilling industry:
Drill Rod Configurations: Drill rods can come in various configurations to meet different drilling requirements. These configurations include:
Single-piece Drill Rods: Single-piece drill rods are continuous rods that are used for shallow drilling applications where shorter rod lengths are sufficient.
Threaded Drill Rods: Threaded drill rods are made up of multiple threaded sections that can be connected or disconnected to achieve the desired drilling depth. This allows for flexibility in adjusting the length of the drill string.
Telescopic Drill Rods: Telescopic drill rods consist of nested sections that can be extended or retracted, allowing for variable drilling depths without the need for adding or removing sections. They are commonly used in sonic drilling and some geotechnical applications.
Rod Corrosion Protection: Drill rods are often subjected to harsh drilling environments and may be exposed to corrosive agents. To protect against corrosion, various measures can be taken, such as using corrosion-resistant materials like stainless steel or applying protective coatings.
Rod Straightness: Maintaining the straightness of drill rods is crucial for achieving accurate and precise drilling. Bends or deviations in the drill rods can affect the trajectory of the drilling operation. Therefore, drill rods are manufactured to strict tolerances to ensure minimal deflection during drilling.
Rod Diameter and Wall Thickness: The diameter and wall thickness of drill rods are selected based on the drilling requirements, including the desired borehole diameter, drilling method, and ground conditions. Thicker-walled rods are typically used for more demanding drilling operations or in situations where higher torque or weight capacities are required.
Rod Material Strength: Drill rods are made from high-strength materials to withstand the forces and stresses encountered during drilling. The material properties, such as tensile strength and hardness, are carefully selected to ensure the rods can withstand the required loads and resist wear and fatigue.
Rod Coupling Types: Drill rods have different coupling types to securely connect individual rod sections. Common coupling types include threaded connections, pin and box connections, or quick-release connectors. The choice of coupling depends on factors like the drilling method, equipment compatibility, and ease of assembly and disassembly.
Rod Markings and Identification: Drill rods often have markings or identification codes engraved or painted on them. These markings help track the rods, identify their specifications, and ensure proper inventory management.
Rod Certification and Standards: Drill rods may be subjected to industry standards and certifications to ensure their quality and performance. For example, drill rods used in the mining industry may need to comply with specific safety standards or certifications.
Rod Recycling and Disposal: Once drill rods reach the end of their service life, they can be recycled or disposed of in an environmentally friendly manner. Recycling can involve processes like melting down the rods to recover the metal content, while disposal methods adhere to local regulations and guidelines.
These additional details provide further insights into the various aspects of drill rods, including their configurations, protection against corrosion, straightness, material strength, coupling types, certification, and end-of-life considerations.
Parameter table
| Size | Outer Diameter (mm) | Inner Diameter(mm) |
| AQ | 44.7 | 37.3 |
| BQ | 55.7 | 46.1 |
| NQ | 70.0 | 60.2 |
| HQ | 89.0 | 78.0 |
| PQ(PHD) | 114.5 | 101.5 |
| BTW | 56.3 | 48.0 |
| NTW | 73.3 | 64.0 |
| HTW | 91.3 | 81.0 |
| AW/AWJ/AWY | 43.7 | 30.7 |
| BW/BWJ/BWY | 54.0 | 38.0 |
| NW/NWY | 66.8 | 51.0 |
| HW | 89.0 | 71.0 |
| 42mm | 42.0 | 30.0 |
| 50mm | 50.0 | 37.0 |
| 60mm | 60.0 | 48.0 |
| 70mm | 73.0 | 54.6 |
| 90mm | 89.0 | 69.0 |
| S75A | 71.0 | 60.0 |
| S95A | 89.0 | 78.0 |
| S110 | 110.0 | 98.0 |
| S130 | 129.0 | 117.0 |
| Name: | Wireline Drill Rod |
| Product Basic parameters | |
| Model: | AQ,BQ,LTK48,NQ,NQ3,HQ,HQ3,PQ,PQ3 NTW, BTW, HTW |
| Material: | Alloy Steel Tubing |
| Dimensions: | 0.5,1m, 1.5m, 2m,2.5,3m length or customized |
| Color: | Black or customized |
| Applications: | Drilling Tools |
| Standard: | ISO-9001 |
| Application: | Mining or geological Drilling |
| Rod Model | OD (mm) | ID (mm) | Thread Pitch(mm) | Pin Length(mm) | Rod Length(m) | Unit Bundle Qty (pcs) |
| BAU(Q) | 55.6 | 46.1 | 8.5 | 44.5 | 3 | 19/25/30 |
| NAU(Q) | 69.9 | 60.3 | 8.5 | 44.45 | 3 | 19/25/30 |
| HAU(Q) | 88.9 | 77.8 | 8.5 | 44.45 | 3 | 19/25/30 |
| BRAU(RQ) | 55.6 | 46.1 | 8.5 | 42 | 3 | 19/25/30 |
| NRAU(RQ) | 69.6 | 60.3 | 8.5 | 42 | 3 | 19/25/30 |
| HRAU(RQ) | 88.9 | 77.8 | 8.5 | 42 | 3 | 19/25/30 |
| PHD | 114 | 102 | 10.2 | 63 | 3 | 79/25/30 |
FAQ:
Q31: What causes cracks to form in drilling rods?
A: Cracks are caused by cyclic fatigue from repeated bending stresses during trip/rotation, tension/compression loading on threads, corrosion/wear reducing structural integrity over time, thermal shock during welding repairs, manufacturing defects, stress concentrations from scratches/notches, unintended impacts from mishandling or downhole.
Q32: What non-destructive testing methods are used on drilling rods?
A: Common NDT includes magnetic particle testing, eddy current testing, ultrasonic testing and radiographic testing (x-ray). MPT checks for external surface cracks. Ultrasonic wall thickness gauge measures corrosion/wear. Radiography checks internal flaws. Together these help evaluate rod integrity without damaging the metal.
Q33: What is whipstock drilling and when is it used?
A: Whipstocks are steel wedges installed in a cased/lined wellbore that deflect drilled sidetrack holes into predetermined angles, allowing drilling around obstructions or continued production from a single surface location in multiple pay zones. Used to bypass fish, bridge plugs etc.
Q34: What are some common defects seen in used drilling rods?
A: Thread wear, corrosion inside/out, thinning from abrasion, cracking from fatigue or impacts, pitting, galling/damage of threaded connections, out-of-roundness, damage/wearing of end protectors, residual hole/feeler gauge binding in threads indicating ovalization. Rigorous inspections needed to ensure integrity.
Q35: What is the purpose of a downhole jar or shock tool?
A: Downhole jars mechanically jolt or shock the stuck drill string to help overcome binding friction and freedamn or break loose a pipe stuck in the borehole. Common designs use spring-loaded or compressible components that rapidly expand on trigger to generate percussion forces several times the string weight.
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