Basic Info.
Product Description
Product Description:
Some additional details about drill rods in the rock coring and drilling industry:
Rod Alignment and Surveying: Drill rods play a crucial role in maintaining the alignment and trajectory of the borehole. Alignment can be ensured through the use of alignment guides or centralizers attached to the drill rods. Additionally, specialized surveying tools like gyroscopes or magnetic survey instruments can be installed in the drill rods to provide accurate measurements of the borehole orientation and alignment.
Rods for Diamond Drilling: Diamond drilling is a common method used in mineral exploration and geotechnical investigations. Drill rods for diamond drilling are designed to support the diamond bit and provide water or drilling fluid circulation to cool the bit and remove cuttings. These rods often have a waterway or flushing channels to facilitate efficient drilling operations.
Rods for Reverse Circulation (RC) Drilling: Reverse circulation drilling is a technique commonly used in exploration drilling for sampling and collecting rock chips or cuttings. Drill rods for RC drilling are specifically designed to allow for the collection of drill cuttings through the center of the rods, which are then brought to the surface for analysis.
Rods for Auger Drilling: Auger drilling is a method used for shallow soil investigation or environmental sampling. Drill rods for auger drilling are typically hollow and have a helical auger attached to the bottom. The rotation of the rods and the auger allows for the extraction of soil or other materials from the subsurface.
Rods for Sonic Drilling: Sonic drilling is a technique that utilizes high-frequency vibrations to advance the drill bit into the ground. Drill rods for sonic drilling are designed to transmit the vibrations from the sonic drill head to the bit efficiently. These rods are often constructed with materials that minimize energy loss and dampen vibrations.
Rods for Geotechnical Instrumentation: Drill rods are used in the installation of various geotechnical instruments and sensors for monitoring ground conditions. These instruments, such as piezometers, inclinometers, or extensometers, are attached to the drill rods and inserted into the borehole to measure parameters like groundwater pressure, ground movement, or stress-strain behavior.
Rods for Environmental Sampling: In environmental investigations, drill rods are often used to collect soil, sediment, or groundwater samples for analysis. Different sampling techniques, such as direct push sampling or soil vapor sampling, may require specialized drill rods designed to accommodate specific sampling tools or equipment.
Rods for Casing Advancement: In some drilling operations, drill rods are used to advance casing or pipe into the ground simultaneously with the drilling process. These rods, known as casing advancement systems, allow for the installation of casing or liner to stabilize the borehole or provide structural support.
Rods for Offshore Drilling: Offshore drilling operations pose unique challenges due to the marine environment and water depths. Drill rods used in offshore drilling are designed to withstand the corrosive effects of seawater and the higher pressures encountered at greater depths. They may also incorporate features for improved thread sealing and connection integrity.
Rods for Geothermal Drilling: Geothermal drilling involves drilling deep into the earth to tap into geothermal energy resources. Drill rods for geothermal drilling are designed to handle the high temperatures and pressures encountered in geothermal reservoirs. They often incorporate advanced materials and specialized coatings to withstand the extreme geothermal conditions.
These additional details provide further insights into the specific applications and considerations related to drill rods in various drilling techniques, such as diamond drilling, reverse circulation drilling, auger drilling, sonic drilling, geotechnical instrumentation, environmental sampling, casing advancement, offshore drilling, and geothermal 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 is the difference between straight hole and directional drilling?
A: Straight hole drilling involves drilling vertically downward, while directional drilling refers to drilling deviated wellbores at an angle or horizontally using specialized bottomhole assembly tools and steering techniques to reach targets.
Q2: Why are drilling mud weights important to control?
A: Correct mud weight balancing downhole pressure helps prevent underground kicks, blowouts and lost circulation. Too light can allow gas influx, too heavy risks fracturing formation and stuck pipe. Proper monitoring and adjustment is critical for well integrity and safety.
Q3: What is the purpose of blowout preventers (BOP)?
A: BOP stacks installed at wellhead provide a mechanical means to shut in a well immediately in an emergency like a kick to prevent a blowout at surface. Components like blind/pipe rams can seal drilled annulus or around drillstring to contain downhole pressures.
Q4: What is underreaming and when is it used?
A: Underreaming refers to enlarging the wellbore below restriction points like narrow shale layers. This prevents stuck pipe when tripping through. Expandable reamers cut an eccentric widened hole below standard bit size to facilitate running liners or casing through tight zones safely.
Q5: What are common downhole motors used for?
A: Downhole motors driven by drilling fluids generate rotation for steerable systems or drillstring in stationary pipe applications like coiled tubing drilling. Positive displacement motors or turbines are utilized for mud pulse MWD, LWD logging, and motor-driven RSS rotary steerable technologies.
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