Implementation Standards for Tubing Pup Joints

The tubing pup joints are pipe fitting for connecting tubing, which is mainly used in the drilling, oil production and transportation processes of the oil and gas industries. It is characterized by a short length (usually 1-2 meters), a large diameter (generally 2-6 inches), and a thin wall thickness (generally 4-12mm).

The tubing pup joint plays an important role in the oil and gas industry, and is mainly used to connect and assemble downhole pipe strings. They usually have different lengths, such as 0.25 meters, 0.5 meters, 1 meter, 1.5 meters, etc. These lengths enable the tubing pup joint to adapt to different downhole operation requirements. In addition, the tubing pup joint also has the function of anti-wax and anti-scale. Through the design of the gradual change of the inner diameter, it can effectively prevent the deposition of wax and scale, and extend the pump inspection cycle and wax and scale formation cycle of the oil well. ‌

Implementation standards for tubing pup joints ‌

The implementation standards for tubing pup joints refer to the technical specifications and requirements that must be followed for the manufacture and testing of tubing pup joints. These standards ensure that tubing pup joints meet specific performance and quality requirements during design and production. The following are common implementation standards:

‌1. API 5CT‌: This is a standard specification for tubing and casing, developed by the American Petroleum Institute. API 5CT specifies the specifications, materials and performance requirements for tubing pup joints.

‌2. ASTM D1145-84‌: This standard defines the electrical insulation performance and appearance requirements of tubing pup joints.

‌3. ISO 178:2019‌: This standard specifies the test methods and evaluation criteria for tubing pup joints, including the measurement of parameters such as short-circuit current, voltage and withstand voltage.

‌4. ANSI/UL 498‌: This standard specifies the safety requirements for tubing pup joints, including appearance, insulation, electrical parameters and withstand voltage.

5. API 5B‌: This is also an important implementation standard for tubing pup joints, mainly used to ensure the quality and performance of tubing pup joints‌.

‌Specifications of tubing pup joints

1. Length: The length of tubing pup joints is usually between 2 feet (0.61 meters) and 20 feet (6.10 meters). The specific length ranges include 0.25 meters, 0.5 meters, 1 meter, 1.5 meters, etc. ‌

2. Diameter and wall thickness: The diameter of tubing pup joints is usually between 1.9 inches and 4.5 inches. Common diameter specifications include 1.9 inches, 2-3/8 inches, 2-7/8 inches, etc. There are also many options for wall thickness, such as 6.35 mm.

3. Steel grade: Common steel grades for tubing pup joints include J55, K55, N80, L80, L80-1, L80-9CR, L80-13CR and P110 ‌‌12. These steel grades of tubing pup joints are suitable for different application scenarios and needs. For example, J55 and K55 steel grades of tubing pup joints are suitable for general well conditions, while N80 and L80 steel grades of tubing pup joints are suitable for well conditions with medium pressure and temperature. P110 steel grade tubing pup joints are suitable for deep or ultra-deep wells with high pressure and temperature.

Summary

These standards ensure that the quality and performance of tubing pup joints during manufacturing and testing meet the requirements and are suitable for different application scenarios and needs. Tubing pup joints play an important role in the oil and gas industry. It can connect tubings of different specifications and play a role in connection and diversion. In practical applications, it is necessary to select appropriate standards and specifications according to specific uses and regional regulations.