The Casing Running Tool (CRT) is a primary interface between the casing string and the rig system, designed to deliver full mechanical control throughout casing running operations.
It enables controlled pick-up, set-down, rotation, and circulation while maintaining thread integrity and load transfer within design limits.

From field execution, correct CRT selection based on casing size, weight, connection type, and torque capacity is essential.
Improper engagement, over-torque, or poor weight management can lead to thread galling, casing deformation, premature release, or stuck casing scenarios.

During tight hole conditions, high drag environments, or wells with elevated dogleg severity, the ability to rotate and circulate through the CRT becomes critical for managing friction, improving hole cleaning, and maintaining running efficiency.
Continuous monitoring of hook load, torque response, and set-down weight is a key practice to detect abnormal trends early and prevent non-productive time.

A well-operated casing running tool is not just a handling device—it is a risk control element that directly affects casing integrity, cementing quality, and long-term well performance