Indexing Sub

The Indexing Sub is a specialized tool engineered to enable controlled rotation of casing or liner strings, addressing the challenges of reaching target depth in complex and difficult wellbores. In operations where conventional string rotation is not feasible or might generate excessive torque, the Indexing Sub provides a reliable solution to rotate the casing in stages. This capability is crucial in navigating tight sections of the wellbore, ensuring that the casing string can be successfully installed to the desired depth without the risk of sticking or excessive drag.

The tool operates by allowing the casing string to rotate in controlled increments as the string is picked up and set down. This staged rotation helps to clear obstructions and debris that might otherwise prevent the casing from reaching the target depth. A unique feature of the Indexing Sub is its ability to rotate only when under tension, meaning that no torque is generated when setting down weight on the string. This feature protects other components in the downhole assembly from potential damage due to torque transfer.

The Indexing Sub is compatible with both cemented and un-cemented casing operations, making it a versatile tool for a wide range of applications. It is particularly useful in scenarios where full string rotation is necessary but difficult to achieve due to wellbore conditions. Additionally, the tool can be used in conjunction with reamer shoes to assist in clearing debris and ensuring smooth passage of the casing string through tight spots.

Built from high-strength steel, the Indexing Sub is designed to withstand the demanding conditions of downhole environments. Its corrosion-resistant coating ensures durability and long-term performance, even in harsh wellbore conditions. The tool is available in various sizes to match different casing and liner configurations, ensuring that it can be tailored to specific operational needs.

In summary, the Indexing Sub is an essential tool for managing wellbore challenges and ensuring successful casing operations. By enabling controlled rotation without generating excessive torque, it helps operators to reach target depths efficiently and safely, even in the most challenging well conditions.