Commonly Used Drill Pipe Sizes and Inner Diameters

Drill pipe is an important tool in oil drilling and can be used to drill holes and feed drill bits. Drill pipes come in different sizes and are suitable for wells of different depths and for different types of rock. This article will introduce common drill pipe sizes and inner diameters. Commonly used drill pipe sizes and inner diameters include international and domestic standard drill pipe models, diameter ranges and inner diameter sizes. Different drill pipes have different characteristics and applications.

International standard drill pipe:

1. AW drill pipe

AW drill pipe is a drilling rig accessory manufactured by Atlas Copco, an American drill rig and tool manufacturer, and is widely used in rock drilling and mine exploration. Its diameter range is 27mm-43mm, and its inner diameter is 18mm-31.75mm. AW drill pipe is a heavy-duty, high-strength drill pipe suitable for deep hole drilling and special engineering drilling. It is mainly used to drill shallow wells with a depth of no more than 100 meters, and the length is usually 6 meters, 9 meters or 12 meters.

2. BW drill pipe
BW drill pipe is a type of drill pipe that is smaller than AW drill pipe and is widely used in geological exploration, basic engineering, water conservancy engineering and other fields. Its diameter range is 36mm-60mm, and its inner diameter is 22mm-36mm. BW drill pipe is more suitable for drilling shallower formations than AW drill pipe. It is mainly used for drilling depths between 100 meters and 200 meters, and the length is usually 6 meters, 9 meters or 12 meters.

3. NW drill pipe

NW drill pipe is a drill pipe with larger diameter, thicker and more durable, suitable for deep hole geotechnical exploration and hydraulic drilling. Its diameter range is 47mm-89mm, and its inner diameter is 32mm-56mm. NW drill pipe is a high-performance drilling tool that can cope with heavy loads and strong impact working environments. It is mainly suitable for drilling with depths between 200 meters and 600 meters, and the length is usually 3 meters or 6 meters.

4. HW drill pipe

HW drill pipe is a larger diameter and more durable drill pipe that is widely used in geological drilling and oil exploration. Its diameter range is 76mm-146mm, and its inner diameter is 46mm-101mm. HW drill pipe is a high-quality, extremely durable drilling tool suitable for a variety of deep hole and heavy-duty drilling operations. It is mainly used for drilling depths between 600 meters and 1000 meters, and the length is usually 3 meters or 6 meters.

5. HWT drill pipe

HWT drill pipe is a 3.45-inch (88mm) diameter drill pipe with an inner diameter of 2.625-inch (66.7mm) suitable for drilling depths between 1,000 meters and 1,500 meters. Its length is usually 3 meters or 6 meters.

6. PW drill pipe
PW drill pipe is a 4.25-inch (108 mm) diameter drill pipe with an inner diameter of 3.75-inch (95.3 mm) suitable for drilling depths between 1,500 meters and 2,000 meters. Its length is usually 3 meters or 6 meters.

Chinese standard drill pipe:

1. Φ42 drill pipe
Φ42 drill pipe is a relatively common domestic standard drill pipe with a diameter of 42mm and an inner diameter of 28mm. It is suitable for different types of geological drilling and exploration of engineering structures.

2. Φ50 drill pipe

Φ50 drill pipe is a domestic standard drill pipe with wide applicability, with a diameter of 50mm and an inner diameter of 34mm. It is suitable for different fields such as geotechnical exploration and foundation construction.

3. Φ60 drill pipe

Φ60 drill pipe is one of the larger diameter drill pipes in domestic standards, with a diameter of 60mm and an inner diameter of 40mm. It is suitable for drilling operations in some deeper holes such as highway tunnels and subway construction.

Conclusion:

This article introduces commonly used drill pipe sizes and inner diameters. Different drill pipes have different characteristics and applications. Choosing the appropriate drill pipe can help improve drilling efficiency and quality.

Read more: Common Drill Pipe Connection