Vibrational tool with tool axis rotational mass and method
AssigneeCNPC USA Corporation
InventorMarvin A. Gregory
Life of this patent
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Abstract
A vibrational tool with tool axis rotational mass and method is disclosed, which may be utilized to assist in lowering a drill string into a wellbore. A reciprocating member and rotatable mass are mounted within a vibrational tool housing. A plurality of curved passageways are positioned to induce rotation in response to fluid flow through the tool housing. As the rotatable mass rotates, a mechanical interconnection causes the reciprocating member to reciprocate, and results in vibrational forces for moving a bottom hole assembly.
Claims20
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;
- 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.
A method to provide a vibration tool for use with a tubular string in a well bore through which drilling fluid is pumped, comprising:
- providing a housing attachable to said tubular string;
- mounting a reciprocating member within said housing for reciprocating movement at least generally axially with respect to said housing;
- rotatably mounting a mass within said housing for rotation at least generally around an axis of said housing;
- mechanically interconnecting an end of said mass to said reciprocating member to provide a first mechanical interconnection whereby relative rotation of said mass with respect to reciprocating member results in reciprocal motion of said reciprocating member.
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 within said housing mounted for rotation in response to flow of said drilling fluid;
- a first variable resistance mechanism mechanically connected to said rotatable mass operable to vary a resistance to rotation of said rotatable mass whereby said fluid flow of said drilling fluid induces vibrations.
Dependencies are inferred from the claim text.