Some additional details related to wireline coring using a drill rod in the mining industry:
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Core Sample Analysis and Testing:
- Laboratory Testing: Core samples obtained through wireline coring are subjected to a range of laboratory tests to extract valuable information. These tests can include mineralogical analysis, geochemical analysis, physical properties testing (e.g., density, porosity), and mechanical testing (e.g., compressive strength, tensile strength). These tests help determine the quality and characteristics of the rock formation, which is essential for mine planning and design.
- Sample Preparation: Core samples are carefully prepared in the laboratory before testing. This may involve cutting the core into specific lengths, removing any damaged or contaminated sections, and ensuring the samples are representative of the rock formation being analyzed.
- Non-Destructive Testing: In addition to destructive testing, non-destructive testing techniques may be employed to assess the properties of the core samples without damaging them. Examples of non-destructive testing include X-ray fluorescence (XRF) analysis, X-ray diffraction (XRD) analysis, and geophysical testing methods such as seismic testing or electrical resistivity measurement.
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Borehole Imaging:
- Borehole Imaging Tools: Wireline coring can be complemented with borehole imaging tools to obtain detailed visual information about the borehole wall and rock formations. These tools, such as optical televiewers or acoustic borehole imagers, capture images or acoustic data that can help identify rock structures, fractures, bedding planes, and other geological features.
- Interpretation and Analysis: The data collected from borehole imaging tools is interpreted and analyzed to gain a better understanding of the geological conditions, rock properties, and structural features encountered in the borehole. This information is valuable for geological mapping, rock mass characterization, and identifying potential mineralization zones.
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Directional Drilling and Steering:
- Directional Drilling: Wireline coring can be combined with directional drilling techniques to reach specific targets or control the trajectory of the borehole. Directional drilling involves adjusting the inclination and azimuth of the drill string to steer the borehole in a desired direction.
- Steering Tools: Specialized tools, such as mud motors or rotary steerable systems, may be used to control the direction of the drill string. These tools allow for real-time adjustments to the drilling path, enabling precise targeting of mineralized zones or specific geological features.
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Downhole Surveying:
- Surveying Tools: Downhole surveying tools, such as gyroscopic survey instruments or magnetic survey tools, can be used in wireline drilling to accurately determine the orientation and position of the borehole. These tools provide data on the borehole's inclination, azimuth, and coordinates, which are crucial for accurate geological mapping and spatial analysis.
- Survey Data Interpretation: The survey data is interpreted to create detailed borehole logs, cross-sections, and three-dimensional models of the subsurface. This information aids in understanding the geological structure, identifying potential mineralization zones, and optimizing mining exploration and development strategies.
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Drilling Optimization and Efficiency:
- Real-Time Monitoring: Wireline drilling operations can be monitored in real-time using various sensors and instruments. Parameters such as drilling parameters (e.g., torque, weight on bit), penetration rate, and downhole conditions (e.g., temperature, pressure) can be continuously monitored to optimize drilling performance and identify any potential issues or challenges.
- Automation and Control Systems: Advanced automation and control systems can be implemented in wireline drilling rigs to improve drilling efficiency and safety. These systems can automate certain drilling processes, provide real-time feedback to the drill operator, and ensure precise control over drilling parameters.
Wireline coring using a drill rod is a versatile and efficient method for obtaining high-quality core samples in the mining industry. The integration of laboratory testing, borehole imaging, directional drilling, downhole surveying, and drilling optimization techniques allows for a comprehensive understanding of the subsurface geology and supports informed decision-making in mining exploration, resource evaluation, and mine planning activities.
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: How do you torque and test drill pipe connections?
A: Apply appropriate rotation while recording torque values to specified limits and check for any leakage with pressure testing before using connections downhole.
Q3: How do you monitor downhole survey readings?
A: MWD or LWD tools provide real-time well trajectory readouts to optimize directional control and target accuracy during directional drilling operations.
Q4: How do you take formation core samples?
A: Run specialized coring bits and core catchers to cut continuous rock cores for geological analysis to identify resource-bearing zones for production.
Q5: How do you dispose of drill cuttings?
A: Collect, contain and dispose of cuttings in an environmentally-approved manner according to permit regulations to prevent contamination.
Q5: What PPE is required when tripping pipe?
A: Wear steel-toe boots, hard hat, gloves minimum. Fall protection may also be needed near unguarded drill floor risks from handling heavy rods.