API 5CT Tubing & Casing Pup Joint – Essential OCTG for Oil & Gas Well Completion

API 5CT Pup Joint is a critical OCTG component for oil‑gas drilling, well completion and workover operations. It is manufactured from seamless OCTG raw materials complying with API Spec 5CT, equipped with API standard threads and couplings on both ends. Pup joints are widely used for string length compensation and accurate positioning of downhole tools in onshore & offshore oil‑gas wells, water injection wells and geothermal wells.

Field tubing and casing are supplied in standard fixed lengths. Deviations often occur between actual downhole string assembly and designed well depth. As short pipe segments with matching thread configuration, pup joints adjust total length of tubing/casing strings without cutting full‑length pipes. They enable precise setting of packers, landing tools, perforating guns and hangers, ensuring wellbore integrity and smooth downhole operations.

Pup joints fall into tubing pup joint and casing pup joint. Multiple steel grades, OD sizes and thread forms are available, including standard and custom non‑standard lengths.

Please confirm outer diameter, steel grade, wall thickness, thread type, effective length and service environment (H₂S / CO₂ corrosion) for proper matching between pup joint and downhole string to guarantee long‑term well safety.