| 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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Wireline drilling pipe, also known as wireline drill rods, is a specialized type of drilling equipment used in the drilling industry for various applications, including mineral exploration, geological surveys, and environmental monitoring. Here are some key points about wireline drilling pipe:
Purpose and Function: Wireline drilling pipe is primarily used for core drilling, where the objective is to extract cylindrical samples of the subsurface. The pipe serves as a conduit for the drill bit and the retrieval of the core sample. Unlike conventional drill rods, wireline drill pipe allows for the retrieval of the core sample without removing the entire drill string from the borehole. This feature enables efficient and continuous drilling operations.
Design and Construction: Wireline drill pipe is typically made of high-strength steel alloy to withstand the rigors of drilling. The pipe is designed to be lightweight yet durable, allowing for easy handling and transportation. It consists of several sections, each connected by threaded couplings or rod joints. The pipe sections are generally thinner and longer compared to conventional drill rods to facilitate the retrieval of the core sample.
Wireline System: Wireline drilling pipe is an integral part of a wireline drilling system, which includes additional components such as the wireline winch, wireline cable, and the wireline core barrel. The wireline winch is used to raise and lower the drill string, while the wireline cable provides the necessary strength and flexibility to transmit power and data between the surface and the downhole tools.
Core Barrel Assembly: At the bottom end of the wireline drill pipe, a core barrel assembly is attached. The core barrel is a specialized tool that houses the core bit and collects the core sample during drilling. It typically consists of an inner tube, overshot assembly, and a core lifter. The inner tube houses the core sample and protects it during retrieval. The overshot assembly engages the core bit and allows for the retrieval of the core sample. The core lifter ensures that the core sample remains intact during the extraction process.
Wireline Coring Process: The wireline coring process involves the following steps:
Advantages of Wireline Drilling: Wireline drilling offers several advantages over conventional drilling methods:
Continuous Sampling: Wireline drilling allows for continuous sampling of the subsurface without interrupting the drilling process. This enables efficient and rapid data acquisition, especially in applications where a high volume of core samples is required.
Minimal Waste: With wireline drilling, only the core sample needs to be extracted, resulting in minimal waste material. This is particularly beneficial in environmentally sensitive areas or projects where waste disposal is a concern.
Reduced Downtime: The ability to retrieve core samples without removing the entire drill string from the borehole reduces downtime and improves drilling efficiency. It eliminates the need for tripping out the entire drill string after each core sample extraction.
High-Quality Core Samples: Wireline drilling provides high-quality core samples due to the continuous extraction process. The core samples are generally less fragmented and better preserved, allowing for accurate analysis and interpretation.
Wireline drilling pipe is a specialized tool that plays a crucial role in core drilling operations. Its design, along with the wireline system and core barrel assembly, enables efficient and continuous extraction of core samples. By utilizing wireline drilling pipe, drilling professionals can obtain high-quality subsurface samples for geological analysis, mineral exploration, and other scientific and engineering purposes.
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 managed pressure drilling (MPD)?
A: MPD actively controls downhole pressure profiles during critical operations like tripping and drilling using precise monitoring and adjustment systems. This minimizes formation integrity, influx and flow control risks.
Q2: What type of drill bits are used for PDC drilling?
A: PDC bits feature a matrix of superhard polycrystalline diamond segments bonded to the bit face instead of steel teeth. Roller cone and fixed cutter PDC bits are adapted for different rock formations.
Q3: What is underbalanced drilling?
A: Underbalanced drilling maintains lower pressure than formation at bit for controlled flowback. It reduces formation damage, allows improved reservoir evaluation/cleanup and eliminates reservoir "kill" compared to conventional methods.
Q4: Why is blowout preventer testing important?
A: Regular BOP pressure testing demonstrates integrity and functionality of components like rams before operations, in case emergency well control is needed. Testing ensures BOP operates as designed to seal the well if unexpected downhole pressures are encountered.
Q5: What is a snubbing unit and when is it used?
A: Snubbing units use coiled tubing to pump fluids/tools/cement into pressurized wells or retrieve rods without depressurizing through the BOP stack. Used when intervention is needed in live wells with kicks/fracs/plugs.
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