Pup joints are critical components in oilfield operations, offering flexibility in connecting tubing and casing while adjusting string length. Available in various configurations, sizes, and materials, pup joints serve diverse purposes, from connecting oil tubing to ensuring proper alignment in casing systems. This article provides an in-depth look at the specifications and options available for tubing and casing pup joints, helping you make informed decisions for your projects.
What are API 5CT Tubing Pup Joints?
Pup joints are short sections of tubing or casing designed for use in oil and gas wells. Manufactured to meet stringent API 5CT and API 5B standards, these joints are available in multiple grades, thread types, and configurations to accommodate various operational needs. The wide range of options ensures compatibility with different well conditions and drilling requirements.
Product Name:Pup Joints, Casing Pup Joints, Tubing Pup Joints, NUE/EUE Tubing Pipe, Perforated Pup Joints.
Tubing Pup Joints
Tubing pup joints are used to connect two sections of oil tubing or adjust the overall tubing string length. Their specifications include:
Sizes: Tubing pup joints are available in diameters ranging from 2⅜ inches (60.3 mm) to 4½ inches (114.6 mm).
Weights: Standard or custom weights can be selected depending on operational needs.
Lengths: Common lengths include 1, 2, 3, 4, 6, 8, 10, and 12 feet, with custom lengths available upon request.
Steel Grades: Popular grades include J55, N80, L80, and P110, each suited for specific well conditions.
Connections: Options include external upset (EU) and non-upset (NU) connections, ensuring secure and reliable performance.
Customization: Custom sizes, markings, paint, plating, and additional inspection services are available to meet unique requirements.
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SPECIFICATIONS
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TUBING PUP JOINT
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OD
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GRADE
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END TYPE
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LENGTH(FT)
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2 3/8"
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J/K/L/N/P
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NUE/EUE
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2/3/4/5/6/8/10/12
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2 7/8"
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J/K/L/N/P
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NUE/EUE
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2/3/4/5/6/8/10/12
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3 1/2"
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J/K/L/N/P
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NUE/EUE
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2/3/4/5/6/8/10/12
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4 1/2"
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J/K/L/N/P
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NUE/EUE
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2/3/4/5/6/8/10/12
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Casing Pup Joints
Casing
pup joints are used to connect two sections of casing or adjust the length of a casing string in oil and gas wells. Their specifications include:
Outside Diameter: These range from 4½ inches (114.6 mm) to 13⅜ inches (339.7 mm), covering a broad spectrum of well applications.
Weights: All standard weights are available, and custom options can be tailored to specific needs.
Lengths: Common lengths mirror those of tubing pup joints, with options from 1 to 12 feet and custom lengths available.
Steel Grades: Grades such as H40, J55, K55, N80, L80, T95, C110, P110, and Q125 ensure suitability for diverse well environments.
Connections: Options include SC (Short Coupling), LC (Long Coupling), BC (Buttress Coupling), Semi-Premium, and Premium threads for different casing requirements.
Customization: As with tubing pup joints, casing pup joints can be customized with specific markings, paint, plating, and inspection services.
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ASING PUP JOINT
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OD
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GRADE
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END TYPE
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4 1/2"
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J/K/L/N/P
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LTC/STC/BTC
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5"
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J/K/L/N/P
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LTC/STC/BTC
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5 1/2"
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J/K/L/N/P
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LTC/STC/BTC
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6 5/8"
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J/K/L/N/P
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LTC/STC/BTC
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7"
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J/K/L/N/P
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LTC/STC/BTC
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7 5/8"
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J/K/L/N/P
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LTC/STC/BTC
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7 3/4"
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J/K/L/N/P
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LTC/STC/BTC
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8 5/8"
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J/K/L/N/P
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LTC/STC/BTC
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9 5/8"
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J/K/L/N/P
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LTC/STC/BTC
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10 3/4"
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J/K/L/N/P
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STC/BTC
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11 3/4"
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J/K/L/N/P
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STC/BTC
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13 3/8"
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J/K/L/N/P
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STC/BTC
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grade
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Yield Strength
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Tensile Strength
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Min
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Max
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Min
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Psi
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MPA
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Psi
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MPA
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Psi
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MPA
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J55
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55000
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379
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80000
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552
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75000
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517
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K55
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55000
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379
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80000
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552
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95000
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655
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N80
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80000
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552
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110000
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758
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100000
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689
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L80
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80000
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552
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95000
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655
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95000
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655
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P110
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110000
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758
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140000
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965
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125000
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862
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Thread Types and Configurations
Pup joints come with a variety of thread types to suit different operational and compatibility requirements. Common options include:
NUE (Non-Upset Ends)
EUE (External Upset Ends)
VAM, STC, LTC, BTC
Special Clearance (XC), VAM TOP, NEW VAM
Each thread type is engineered for reliable sealing and structural integrity, ensuring smooth operations in complex well conditions.
Pup Joint Options
Various configurations of pup joints are available to meet specific operational needs, such as:
Pin x Pin
Pin x Pin with Couplings
Loose Coupling
Box x Pin with Couplings
Hand Tight Coupling
Box x Pin with Bucked-On Couplings
These configurations enhance adaptability and ease of use, making them indispensable in modern oilfield operations.
Usage and Applications of pup joints
The primary purpose of pup joints is to adjust the length of tubing and casing strings during installation or maintenance. They are widely used for:
Connecting Tubing and Casing: Ensures seamless integration and alignment between joints.
Adjusting Length: Helps operators achieve precise string lengths, improving operational accuracy.
Repair and Maintenance: Simplifies disassembly and reassembly, enhancing overall efficiency.
Conclusion
Pup joints, whether tubing or casing, play a vital role in oilfield operations. Their diverse specifications, from sizes and grades to thread types and configurations, ensure compatibility with various well conditions. By selecting the right pup joints for your project, you can achieve optimal performance, durability, and efficiency in your operations.
Understanding the details of API 5CT pup joints and their wide range of options empowers operators to make well-informed choices, contributing to the success of their drilling projects
Pup joint Manufacturer/Pup joint Supplier-BAOWI STEEL MANUFACTURING CO.,LTD
For oil well tubing pup joint, Baowi Steel can provide API standard types (EU, NU, SC, LC, BC, etc.) and BSIG special types and other fixed-length oil well tubing nipples accessories according to the personalized needs of customers. According to the needs of on-site use, they can be processed into nipples with couplings, double external buckle nipples, conversion nipples with different buckle types, conversion nipples with different outer diameter specifications, etc.
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