QUICK DEFINITION: OCTG CONNECTIONS (13CR / CRA)OCTG connections are threaded coupling mechanisms for casing and tubing, governed by API 5CT, API 5B, and proprietary premium standards. They are essential for ensuring gas-tight integrity in high-pressure, corrosive (CRA) wellbores. They fail catastrop

QUICK DEFINITION: CONNECTIONS OF OCTGOCTG (Oil Country Tubular Goods) connections are threaded mechanisms joining casing and tubing segments to maintain hydraulic integrity in wellbores. They are governed by API 5CT for manufacturing and API 5C5 for performance testing, specifically CAL IV for criti

QUICK DEFINITION: CONNECTIONS OF OCTGWHAT IS IT?Threaded joining mechanisms (specifically API Buttress and Semi-Premium) used to connect casing and tubing segments in oil and gas wells.STANDARD:Governed by API 5CT and API 5B specifications, with Semi-Premium adding proprietary features like torque s

Top 5 Causes of Thread Failure in 13Cr Completions and How to Prevent Them

Published: January 2026 | Technical Category: OCTG & Premium Connections

In high-corrosion $CO_2$ enviro

QUICK DEFINITION: X70 LINE PIPEX70 is a High-Strength Low-Alloy (HSLA) line pipe steel with a minimum yield strength of 70,000 psi (485 MPa), governed primarily by API 5Land ISO 3183standards. It is utilized in long-distance high-pressure gas and oil transmission lines where wall thickness reduction

QUICK DEFINITION: X70 LINE PIPEENTITY:A high-strength, low-alloy (HSLA) steel pipe manufactured via Thermo-Mechanical Controlled Processing (TMCP) rather than chemical alloying alone. STANDARD:Governed by API 5L PSL2 and ISO 3183. USE CASE:High-pressure oil and gas transmission pipelines requiring r