Pup joints fulfill important functions across drilling, completion, and workover operations. Its three primary applications are casing strings, production tubing, and oil country tubular goods (OCTG). Understanding typical usage enables proper selection to optimize construction and functionality.
Casing Pup Joints
The casing joint is used to precisely adjust the length of casing strings to match planned well depth and architecture. The ability to fine-tune lengths in small increments versus whole joints provides critical construction flexibility.
Short casing joints called stubs allow landing casing shoes at exact measured depths. Extenders or longer joints add small sections of length as needed. Heavy wall and weighted variants help manage string loads for directional drilling.
It connects via threaded couplings to attach seamlessly with casing joints. Common grades include J55, K55, N80, and L80 selected per design specifications. Robust casing joints reliably provide strength and seals for protection strings.
EUE and other flush profile connections minimize flow restrictions. Premium threads suit high-pressure or corrosive conditions. Careful length selection optimizes annular clearance while ensuring casing integrity at target setting points.
Tubing Pup Joints
In contrast to the casing, the tubing pup joint enables precise adjustment of production tubing strings. Their application focuses on tuning fluid flow performance versus well protection.
Tubing joints allow landing equipment like gas lift mandrels or packers at pre-planned well locations. Small length adjustments facilitate the assembly of optimized tubing dimensions. Extenders also remedy gaps by removing damaged joints.
Corrosion-resistant alloys like J55S and L80T suit tubing joint fabrication. Robust flush connections prevent hang-ups running in the well. Premium seals and close tolerance threading maintain integrity in critical production tubing.
OCTG Pup Joints
OCTG or oil country tubular goods refer to all piping used in drilling and extraction including casing, tubing, drill pipe, and accessories. OCTG pup joint provides short-length adjustments for any piping component.
Drill pipe pup joints fine-tune string length and positioning of bottom hole assemblies. Specialty alloys withstand wear, vibration, and torsional loading. Heavy versions provide weight to put weight on a drill bit.
If you need solutions related to drilling, completion, and workover operations, please contact us at info@vigorpetroleum.com.
