| 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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Audited Supplier Here are some additional details and information about the role of drill rods in rock coring:
Material Selection: Drill rods are typically made of high-strength materials such as alloy steel or stainless steel. These materials provide the necessary strength and durability to withstand the forces and stresses encountered during drilling. The specific material chosen depends on factors such as the drilling conditions, depth, and type of rock formation being cored.
Threaded Connections: Drill rods feature threaded connections at each end, allowing them to be joined together to form a drill string. These connections are typically standardized, such as API (American Petroleum Institute) threads, to ensure compatibility with drilling equipment and accessories. Proper assembly and tightening of the threaded connections are essential to maintain the integrity and strength of the drill string.
Rod Diameter and Wall Thickness: Drill rods come in various diameters and wall thicknesses. The selection of the appropriate rod size depends on factors such as the drilling equipment capabilities, desired core diameter, and the anticipated drilling forces. Thicker walls provide increased strength and stability but can also result in heavier drill rods.
Rod Length and Extensions: Drill rods are available in different lengths ranging from a few meters to several tens of meters. The length of the drill rods is determined by the depth of the rock formation being cored. In cases where the standard length is insufficient, extensions can be added to the drill string to reach greater depths.
Coring Fluid Circulation: In some coring operations, drill rods also facilitate the circulation of coring fluid. Coring fluid, typically a mixture of water and additives, is used to cool the core bit, remove cuttings from the hole, and maintain pressure in the wellbore. Drill rods may have internal channels or grooves to allow the flow of coring fluid from the surface to the core bit.
Maintenance and Inspection: Regular inspection and maintenance of drill rods are essential to ensure their optimal performance and safety. Visual inspections should be conducted before and after each use to identify any signs of wear, damage, or thread deformation. Proper cleaning, lubrication, and storage of drill rods are important to prevent corrosion and maintain their longevity.
Limitations and Considerations: It is important to consider the limitations of drill rods in rock coring. Factors such as the maximum depth achievable, torque limitations, and the type of rock formation being drilled can impact the selection and performance of drill rods. Additionally, in extremely hard or abrasive formations, the wear and lifespan of drill rods may be reduced, requiring more frequent replacement or the use of specialized rods.
Remember, drill rods are critical components in rock coring operations, and their proper selection, maintenance, and inspection are crucial for successful and efficient coring. Consulting with drilling experts, manufacturers, or industry-specific resources can provide further guidance on the specific applications, limitations, and best practices related to drill rods in rock coring.
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 value does coring provide for field development?
A: It helps target remaining infill/step out wells by constraining structural/stratigraphic interpretations. Correlation of cores between boreholes is also important to develop areal extent and connectivity between formations.
Q2: How does coring help production optimization?
A: Identifying permeability barriers, baffles or thief zones from core contributes to reservoir compartmentalization understanding. This guides injection/production scheme placement, supporting secondary/tertiary recovery and pressure management decisions.
Q3: What advantages does coring offer for field appraisal?
A: Early evaluation of deliverability, flow rates and fluid saturations from core plug tests better define hydrocarbon volumes, recovery factors and reserve categorization potential. This influences commercial development plans.
Q4: How does coring benefit unconventional resources?
A: Characterizing rock fabric, fracture/cleat networks, organic richness and mineral volumes is critical for optimal stimulation design in shale gas, tight sandstone and coalbed methane plays. Core provides microscopic-scale reservoir characterization.
Q5: What value does coring provide for carbon capture/storage?
A: It helps identify suitable confining caprock sequences and productive reservoirs with high porosity/permeability injection targets but minimal natural fractures. Core analysis quantifies critical trapping mechanisms and seal integrity parameters.
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