Schlumberger

Brochure: Shock Sub Impact and Vibration Reduction Sub

Date: 3/1/2011

Download: Shock Sub (1.34 MB PDF)

The Shock Sub impact and vibration reduction sub is a drillstring component that is designed to absorb and dampen the variable axial dynamic loads produced by the drill bit during “normal” drilling operations, by interrupting the harmonic cycle created by the bit. The tool uses a bidirectional spring action that allows it to automatically adjust for a wide range of values for weight on bit (WOB). As axial loads are produced, energy is absorbed through the use of the Belleville spring assembly, while force dampening is accomplished by mechanical friction.

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