Drill Rods Marked with Measurement Indicators for Accurate Depth of The Drill Hole

• Type: Wireline Drill Rod
• Usage: Core Drilling
• Certification: CE, ISO
• Material: Cr-Mo Steel, 4130
• Surface Treatment: Heat Treatment
• Industry: Rock Coring Survey
• Model NO.: AQ,BQ,LTK48,NQ,NQ3,HQ,HQ3,PQ,PQ3 NTW, BTW, HTW
• Transport Pack: Iron Bundle
• Product Name: Drilling Rod, Drill Pipe
• Thread Type: Pi, Metric, Dcdma etc.
• Connection: Male/Female
• Surface Finish: Smooth
• Name: Drill Rod, Drill Pipe
• Full Name: Rock Coring Drilling Rod
• Machine Type: Drill Tool
• Application: Oil Mining, Coal Mining, Well Drilling, Ore Minin
• Formation: Medium, Hard, Hard Rock Formation
• Transport Package: Nude/Wooden Case/Carten
• Specification: BQ, NQ, HQ, PQ, SQ
• Trademark: BEST
• Origin: China
• HS Code: 73045120
• Production Capacity: 500000 Pieces/Year

Product Description

Product Description:

 

Some more details and information related to wireline drill rods:

1. Drill Rod Materials:

   • Steel: Most wireline drill rods are made of high-strength steel, such as alloy steel or heat-treated steel. These materials provide the required strength, durability, and resistance to wear and deformation during drilling operations.
   • Alloy Composition: The specific alloy composition of the steel used in drill rods may vary depending on the desired properties, such as tensile strength, hardness, and toughness. Common alloying elements include chromium, molybdenum, nickel, and vanadium.

2. Drill Rod Design:

   • Length and Diameter: Wireline drill rods are available in various lengths and diameters to accommodate different drilling depths and borehole sizes. Longer drill rods are used for deeper drilling, while shorter rods are suitable for shallow drilling or limited access areas.
   • Thread Types: Drill rods feature threaded connections at each end to facilitate their assembly and disassembly during drilling operations. Common thread types include API, AWJ, and NWJ, among others. The choice of thread type depends on the specific drilling equipment and industry standards.
   • Inner Tube and Outer Tube: Some wireline drill rods consist of an inner tube and an outer tube. The inner tube is used to collect the core samples, while the outer tube provides structural support and helps maintain stability during drilling.

3. Drill Rod Accessories:

   • Stabilizers: Stabilizers are used to enhance the stability and straightness of the drill rod during drilling. They are typically placed at strategic intervals along the drill string to minimize deflection and maintain drilling accuracy.
   • Core Barrels: Core barrels are used in wireline coring operations to collect and retrieve core samples. They are attached to the bottom end of the drill rod assembly and contain a core bit or cutting shoe to capture the geological formations.
   • Overshots: Overshots are specialized tools used to retrieve the inner tube of the drill rod, along with the core sample, from the borehole. They provide a secure grip on the inner tube, allowing it to be pulled to the surface without detachment or accidental dropping.

4. Drill Rod Care and Maintenance:

   • Cleaning: After each drilling operation, clean the drill rod thoroughly to remove any drilling fluids, cuttings, or debris. This helps prevent contamination and ensures the longevity of the rod.
   • Lubrication: Apply a suitable thread compound or lubricant to the threads and connections of the drill rod during assembly. This reduces friction, prevents thread galling, and facilitates smooth tightening and loosening of the connections.
   • Storage: Store the drill rods in a clean, dry, and well-ventilated area. Protect them from moisture, extreme temperatures, and corrosive substances that can degrade the rod's performance and structural integrity.

5. Troubleshooting and Problem Resolution:

   • Thread Damage or Wear: If the threads of the drill rod become damaged or worn, it may affect the connection integrity. In such cases, consult the manufacturer's guidelines for thread repair or replacement options.
   • Bending or Deformation: If a drill rod becomes bent or deformed, it should be replaced promptly. Using a bent or deformed rod can compromise drilling accuracy, cause tool jamming, or lead to equipment failure.
   • Core Barrel or Core Bit Issues: If the core barrel or core bit experiences excessive wear or damage, it should be replaced to ensure effective core sampling and retrieval.

Remember, proper care, maintenance, and inspection of wireline drill rods are essential for safe and efficient drilling operations. Regularly inspect the rod for signs of wear, damage, or deformation, and address any issues promptly to prevent potential problems during drilling.

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 swelling and sticking of core in the tube?
A: Partial desaturation and exposure drying sensitive shales prone to volumetric expansion on contact with air, causing core to seize inside protective plastic liner tubes during extraction process.

Q2: How can swelling core be safely removed from the liner?
A: Soak tube in solvent like methyl alcohol or acetone to re-saturate exposed surfaces, then gently push or tap core segments free without twisting motions that may cause breakage. Work slowly with minimal pressure.

Q3: How does loss of mud circulation affect coring operations?
A: Loss of hole cleaning capability allows cuttings to bridge the annulus, potentially causing the core barrel or drill pipe to get stuck during trips. It also hinders collection of high-quality core samples.

Q4: What are the signs of lost circulation?
A: Reduced returns to surface with recovery of only drilling mud, presence of drilling fluid at inappropriate formation levels, drop in mud hydrostatic pressure, packing off or bridging formations.

Q5: How can circulation losses be addressed while coring?
A: Break circulation to shake out bridge, increase mud weights, circulate loss-prevention materials, retry interval with salt/polymer muds, isolate loss zones before coring other sections. Consider re-designing mud system based on lithology.

 

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