Products Description
As the core component of the drill string, API 5DP drill pipe is typically precision-manufactured from seamless steel tubing with a wall thickness range of 9–11 mm. This critical component serves a dual role in oil drilling: on one hand, it transmits torque to ensure drilling stability and efficiency; on the other hand, it facilitates the delivery of drilling fluid, providing necessary lubrication and cooling for downhole operations. As the drill pipe progressively penetrates deeper, the wellbore expands accordingly. Thus, drill pipe holds a pivotal position in oil drilling.
The drill pipe primarily consists of two parts: the API 5DP drill pipe body and drill pipe tool joint. The pipe body forms the main structural element, while the tool joints connect multiple drill pipes to form a continuous drill string. Structurally, the tool joints are connected to the pipe body through specific methods, with the two mainstream connection types being upset threaded connection and butt-welded connection. Upset threaded connections are gradually being phased out, while friction butt-welding technology has become the dominant manufacturing process in modern drill pipe production.
Application Scenarios and Technical Extensions of Drill Pipes
Drill pipe categories should be further refined based on specific operational requirements:
Oil drilling: Must withstand high-temperature and high-pressure environments (e.g., deep-well drill pipes can tolerate temperatures exceeding 200°C). API standards classify them into standard drill pipes (e.g., E-75, X-95 grades) and high-strength drill pipes (e.g., G-105, S-135 grades).
Geological exploration: Lightweight drill pipes (e.g., aluminum alloy) are used for shallow sampling, with lower torque requirements (typically <20,000 N·m).
Special operations: Coiled tubing drill pipes (OD ≤ 50.8 mm) are used for directional drilling, offering higher flexibility but weaker torsional resistance.
It is important to distinguish between drill pipes and tool joints: the drill pipe body is made of seamless steel tubing, while the tool joints connect individual sections via friction welding. The thread type (e.g., NC26, NC38) directly impacts sealing performance and tensile strength.
Products Specification
Application: Used for Mine, water well drilling, well drilling, coal and fore poling
Size: OD:60.32mm-168.28mm,WT:6.45-12.7mm,LENGTH: R1, R2, R3
Pipe Standard: API 5DP E75,X95, G105, S135
Upset Style: lU,EU,IEU
Connection: NC26-NC50,5 1/2FH, 6 5/8FH
Internal coating: TK34,TC2000,Arnco 100XT,200XT,300XT
Dimension Tolerances
Chemical Composition
Mechanical Properties
Products packaging
Drill Pipe Packaging Method
Individual wrapping: Each drill pipe should be placed in a separate plastic bag, with only one drill pipe per bag.
Secure packaging: Tightly seal the plastic bag and secure it with strapping to prevent external forces (vibration, impact) from causing wear or damage.
Wooden box packaging: After strapping, perform secondary packaging using wooden crates. Each crate should contain drill pipes of the same length, with 3–5 drill pipes per crate.
Drill Pipe Labeling Requirements
Label content: Include the following information:
Length
Diameter
Grade
Steel mill
Total usage time
Total usage count
Serial number
Label placement: Attach the label to the center of the drill pipe's outer surface to avoid affecting operational efficiency.
Durability: Use weather-resistant label paper and waterproof paint to prevent peeling in wet or oily environments.
Clarity: Ensure label content is clear and complete, with no alterations or wear.
Packaging date: Indicate the packaging date on the label to help manage the drill pipe's lifespan effectively.
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