English
A tubing pup joint—also referred to as pup joint tubing—is a short length of pipe, typically ranging from 2 to 10 feet long, used in the oil and gas industry. Its primary function is to adjust the length of tubing strings to ensure proper alignment and fit within the wellbore. These joints are essential for connecting various sections of tubing, especially when standard lengths do not meet specific well requirements.
Tubing pup joints are designed and manufactured as per API 5CT standards to adjust the height of tubings. Made of seamless steel tubings, the material grade of a tubing pup joint can be available in J55, K55, N80, L80, or P110. Sizes of tubing pup joints range from 2⅜" to 4½", with thread options including 8RD, 10RD, or BTC. End connection types can be NUE and EUE. The lengths of tubing pup joints are often offered in 2ft, 3ft, 4ft, 6ft, 8ft, 10ft, and 12ft.
| Type: tubing Pup Joint, pup joint oil and gas, pup joint drilling, api 5ct Pup joint, perforated pup joint | ||||
| OD | Grade | End Type | Outside diameter | Wall thickness |
| (mm) | (mm) | |||
| 2-3/8" | J55/K55/N80/L80/P110 | NUE/EUE | 60.32 | 4.83 |
| 2-7/8" | J55/K55/N80/L80/P110 | NUE/EUE | 73.02 | 5.51 |
| 3-1/2 | J55/K55/N80/L80/P110 | NUE/EUE | 88.90 | 6.45 |
| 4-1/2" | J55/K55/N80/L80/P110 | NUE/EUE | 114.3 | 6.88 |
1. Length Adjustment: Fine-tunes the tubing string to match the well depth accurately.
2. Space Management: Ensures proper alignment with wellhead equipment or downhole tools.
3. Repair and Replacement: Replaces damaged tubing sections without replacing the entire string, saving time and costs.
4. Customization: Facilitates adjustments in complex well designs, such as horizontal or multilateral wells.
5. Pressure Integrity: Maintains the same pressure and load ratings as the main tubing, ensuring safety and performance.
Pup joints—specifically pup joint tubing—allow for precise adjustments in the length of tubing strings. This flexibility is crucial for fitting tubing into wells with specific depth requirements or irregular wellbore geometries.
They simplify the process of installing and maintaining tubing strings. Pup joints can be easily added or removed to adjust the length of the tubing string as needed.
By allowing for better alignment and fit, pup joints help maintain the structural integrity of the tubing string. This reduces the risk of leaks, failures, and other issues that could compromise well performance.
Pup joints can be used in various applications, including production tubing, injection tubing, and workover operations. They are also compatible with different types of tubing and can be used with various connection types.
