Hydraulic Ball Drop Actuation for Reusable Downhole Tools

The patent extracts the actuation control function from the wire line system and integrates it into the ball drop mechanism. The ball seat and shear pin assembly are incorporated directly into the reamer body, eliminating the need for external wire line assemblies to control actuation and deactivation.

The patent combines multiple functions into integrated components. The ball seat serves as both the actuation trigger and the deactivation mechanism through the shear pin assembly. The hydraulic actuation system is merged with the mechanical ball drop mechanism, allowing single-action control for both activation and deactivation.

The patent implements a recoverable shear pin assembly that can be reset for repeated use. The shear pins are designed to be replaceable and resettable, allowing the ball seat mechanism to be reused multiple times. The deactivation function is recovered through the same ball drop mechanism that performs activation, enabling multiple actuation cycles.

The ball seat assembly serves multiple functions: it acts as the actuation trigger, the deactivation mechanism through shear pin failure, and the reset point for subsequent operations. This multi-functional design allows the same component to handle both activation and deactivation across multiple cycles.

The patent replaces complex electronic control systems with a purely mechanical ball drop and shear pin mechanism. The actuation and deactivation functions that would require electronic solenoid valves and computer control are achieved through mechanical pressure differentials and shear pin failure, eliminating electronics entirely.

The patent uses simple, inexpensive mechanical components such as shear pins and balls instead of expensive electronic systems. The shear pins are designed as sacrificial elements that fail at predetermined pressures, providing reliable control without the cost and complexity of electronic actuators and control systems.