China Suppliers Factory API 5CT J55/K55 BTC Seamless Steel Casing Pipe for Oil Wells

Casing, the primary structural support and stability for a wellbore, performs the following functions: 1) stabilizing the wellbore, 2) protecting unconfined water sands from contamination, 3) isolating undesirable water from producing formations, and 4) controlling and restricting well pressures during drilling, production, and workover operations. Casing is installed in sections, or "strings", each subsequently smaller in diameter and cemented securely in place. Casing strings include the Conductor, Surface, Intermediate, and Production Casing, with a unique purpose for each string to help the well become robust and safe. When designing the casing, careful consideration is given to casing grade, casing size, and casing weight. This is important in consideration of expected hole conditions, acting pressures, and depth of target. Our casing pipes are designed to yield both high collapse pressures, burst pressures, and tensile loads, sufficiently protecting the performance of the well.