Created on 08.24
Oil Casing‑Core Wellbore Protection Pipe for Oil & Gas Drilling
Oil casing is the core special pipe for oil and gas exploration, manufactured in accordance with API 5CT international standard. It is widely used in on‑shore oilfields, offshore gas fields, deep wells, high‑pressure wells and shale‑gas projects.
Run casing downhole and complete cementing operations. Its main functions are to support wellbore, prevent formation collapse, isolate water and hydrocarbon zones, and avoid leakage and channeling risks, ensuring safe drilling and production.
Common sizes range from 4‑1/2″ to 20″. Typical steel grades include J55, K55, N80, L80, P110, Q125. Thread connections cover STC, LTC, BTC and premium connections with reliable tensile strength and sealing performance.
Seamless oil casing features dense metallurgical structure, high collapse resistance and corrosion resistance. It performs steadily under high‑temperature and high‑pressure downhole conditions, which is fundamental for stable well production.