Patent ID: 9121224
Filing Date: 2015-09-01
Classification: E21B,Y10T

Abstract:
1. A vibration tool for use with a tubular string in a well bore through which drilling fluid is pumped, comprising: a housing attachable to said tubular string; a rotatable mass mounted within said housing for at least substantially symmetrical rotation within said housing around an axis of said housing, said rotatable mass being configured to rotate in response to flow of said drilling fluid through said housing; a plurality of mounts within said housing to rotatably mount said mass for rotation; a reciprocal member mounted for reciprocal movement at least substantially parallel to said axis of said housing; and a first mechanical interconnection between said rotatable mass and said reciprocal member whereby rotational movement of said rotatable mass results in reciprocating movement of said reciprocal member, wherein at least two of said plurality of mounts for said housing for rotationally mounting said mass are positioned on axially opposite sides of said mass with respect to an axis of said housing and prevent axial movement of said mass with respect to said housing.