Pivoting Finger Centraliser for Deviated Well Cementing

The centraliser employs dynamic fingers that can pivot between a retracted configuration during run-in and an extended configuration during centralisation. This dynamic transformation allows the centraliser to adapt to different operational phases, providing both easy deployment and high load-bearing capacity when needed.

The centraliser body is divided into multiple independent fingers that can move relative to each other. Each finger can be independently extended to engage the conduit wall, distributing the load across multiple contact points and significantly increasing the overall load bearing capacity while maintaining reliability.

The fingers serve multiple functions: they act as structural support elements during run-in, transform into load-bearing engagement elements during centralisation, and can be locked in position to maintain centralisation. This multi-functionality reduces the need for separate components for each operational phase.

The fingers are nested within the centraliser body in the retracted configuration, allowing them to be stored compactly during deployment. When activation is required, the fingers extend outward from the body, transforming from a compact nested state to an extended engagement state without requiring separate storage mechanisms.

The collar acts as an intermediary component that translates axial movement into radial finger extension. By moving along the finger's length, the collar pivots the finger from the retracted to the extended configuration, providing a simple mechanical means to convert linear motion into the desired angular motion without complex linkages.

The finger's own geometry and the collar's movement along it create the pivoting action automatically. The mechanical arrangement allows the collar's linear displacement to self-generate the rotational motion of the finger through the defined geometric relationship between the collar path and the finger pivot point.