Pup Joints

Specifications and Dimensions

Pup joints are available in standard lengths of 5, 10, 15, and 20 feet. For specialized needs, custom lengths can be manufactured upon request. They are designed to handle a minimum yield strength of 110,000 PSI, making them suitable for demanding drilling conditions.
These joints are often equipped with standard API or proprietary high-performance connections. This ensures compatibility with other components in the drill string, enhancing their adaptability.

Outside Diameter: 4 ½ inch – 13 3/8 inch

Typical Lengths: 1, 2, 3, 4, 6, 8, 10, 12 ft

The main materials of oil casing short sections are J55, K55, N80, L80, C90, T95, and P110. Hot rolling process round tube billet → heating → perforation → three-roller oblique rolling, continuous rolling or extrusion → tube removal → sizing (or reducing diameter) → cooling → straightening → water pressure test (or flaw detection) → marking → storage; cold drawing (rolling) seamless steel tube round tube billet → heating → perforation → heading → annealing → pickling → oiling (copper plating) → multi-pass cold drawing (cold rolling) → billet tube → heat treatment → straightening → water pressure test (flaw detection) → marking → storage.

Types of Pup Joints
Pup joints are categorized based on their connection types and applications. This classification helps in meeting various operational demands effectively.

Connection Types:
Threaded Pup Joints: These are further divided into two-head external thread, single-head external thread, and flathead external thread types.
Flange Pup Joints: This type connects through flanges and is often used in applications requiring bolted connections.

Usage-Based Types:
Tubing Pup Joints: Specifically designed for tubing operations, they are available in various lengths and grades.
Casing Pup Joints: These are shorter lengths of casing pipes used for precise placement in wellbores.

Connections
API Ferrule Connectors
Seamless oil pipes manufactured to API 5ct specification with quality API monogram. Available in optional diameters, lengths, weights and grades as required.

Threaded Connectors
Short seamless connections with high quality connections in API grades and special alloys. High quality ends are threaded by the manufacturer or licensee.

Sleeve Connectors
Available in any length, weight and grade as required.

Drilled Pup joint
Available in standard or special drilled distances. Each nipple has four rows of 3/8 inch holes drilled longitudinally along the pipe. Optional pattern, hole size and length as required.

Applications of Pup Joints

Maintenance and Repair: Pup joints make it easier to replace damaged sections without altering the entire pipe string.

Comparison with Tubing

Although pup joints and tubing share similar characteristics, their primary difference lies in their length. Pup joints are shorter than Range 1 tubing while maintaining the same thread connection. This feature ensures seamless integration within the tubular string.

Advantages of Using Pup Joints

Baowei-Steel offers high-quality pup joints designed to meet the rigorous demands of oil extraction. Our pup joints undergo hydrostatic testing, torque testing, and electromagnetic inspection to ensure reliability and durability. Whether used for casing strings or production tubing, Baowei-Steel's pup joints effectively prevent potential risks, avoiding costly losses. Choosing BAOWI Steel means securing your oil production with reliable support, ensuring safety and success.

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