| Type: | Wireline Drill Rod |
|---|---|
| Usage: | Core Drilling |
| Certification: | CE, ISO |
| Material: | Cr-Mo Steel, 4130 |
| Surface Treatment: | Heat Treatment |
| Industry: | Rock Coring Survey |
| Samples: |
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| Customization: |
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Here are some additional details about drill rods:
Drill Rod Manufacturing Process: Drill rods are typically manufactured through a series of processes that involve forging, heat treatment, machining, and inspection. Here's a brief overview of the manufacturing steps:
Forging: The initial step involves forging the drill rod blanks from high-quality steel alloys. Forging involves shaping the heated steel material into the desired rod shape using compressive forces.
Heat Treatment: After forging, the drill rod blanks undergo heat treatment processes such as quenching and tempering. Heat treatment helps improve the mechanical properties of the steel, including its strength, hardness, and toughness.
Machining: The heat-treated drill rod blanks are then machined to achieve the final dimensions and thread profiles. Machining processes like turning, milling, and threading are employed to create the required features and tolerances.
Inspection: Throughout the manufacturing process, drill rods undergo rigorous inspection to ensure their quality and adherence to specifications. Various non-destructive testing methods, including visual inspection, ultrasonic testing, and magnetic particle inspection, may be employed to detect any defects or discontinuities.
Drill Rod Grades: Drill rods are available in different grades, which indicate their specific properties and suitability for various drilling applications. The grade of a drill rod is typically determined by the steel material used and its mechanical properties. Higher-grade drill rods generally offer superior strength, toughness, and resistance to wear and fatigue. Common drill rod grades include API Grade E, S135, and G105, among others.
Drill Rod Compatibility: Drill rods need to be compatible with other components of the drilling system, such as drill bits, subs, stabilizers, and drilling rigs. Compatibility ensures that the different components fit together securely and function effectively during drilling operations. Drill rod manufacturers often provide compatibility charts or guidelines that specify the suitable combinations of drill rods and other drilling equipment.
Specialized Drill Rods: In addition to the standard drill rods used in various drilling applications, there are specialized types of drill rods designed for specific purposes:
Coring Rods: Coring rods are used in core drilling, where the objective is to extract intact cylindrical samples of the subsurface. These rods are designed to accommodate core barrels and core bits, allowing for efficient retrieval of core samples.
Directional Drill Rods: Directional drill rods are used in directional drilling, a technique employed to deviate the wellbore from the vertical. These rods are designed to withstand the bending and torque forces associated with directional drilling operations.
Sonic Drill Rods: Sonic drill rods are used in sonic drilling, a method that utilizes high-frequency vibrations to advance the drill bit into the ground. These rods are engineered to transmit the sonic energy efficiently while maintaining structural integrity.
Drill Rod Maintenance: Proper maintenance of drill rods is critical to ensure their longevity and performance. Some maintenance practices include:
Cleaning: Regularly cleaning drill rods after use helps remove dirt, debris, and drilling fluids that can cause corrosion or blockage in the threaded connections.
Lubrication: Applying a suitable thread compound or lubricant to the threaded connections helps reduce friction, prevent galling, and promote smooth makeup and breakout of the drill rods.
Storage: Proper storage of drill rods involves keeping them in a dry, clean environment to prevent corrosion. Rod racks or stands can be used to organize and protect the drill rods from physical damage.
Inspection: Regular inspection of drill rods helps identify any signs of wear, damage, or fatigue. Visual inspection and non-destructive testing techniques can be employed to detect any defects or discontinuities.
Replacement: When drill rods exhibit significant wear, damage, or fatigue, they should be replaced to maintain drilling efficiency and safety. It is important to follow manufacturer recommendations for the maximum service life of drill rods.
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:
Q1: What causes cracks to form in drilling rods?
A: Cracks are caused by cyclic fatigue from bending stresses, tension/compression loading, corrosion/wear reducing integrity over time, thermal shock during welding repairs, manufacturing defects, stress concentrations from scratches/impacts and more.
Q2: What NDT methods are used?
A: Common NDT includes magnetic particle, eddy current, ultrasonic, and radiographic testing. These evaluate integrity without damaging the metal.
Q3: What is whipstock drilling and when used?
A: Whipstocks are wedges that deflect sidetrack holes at predetermined angles, allowing drilling around obstructions from one surface location through multiple pay zones. Used to bypass fish/plugs.
Q4: What defects may be seen?
A: Thread wear, corrosion, thinning, cracking, pitting, galling, damage, ovalization, protector wear are inspected for.
Q5: What is the purpose of downhole jars?
A: Jars mechanically jolt stuck pipe to overcome friction and free or break out the string. Springs or compressible components rapidly expand on trigger.
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