Well tubing/casing vibrator apparatus

A vibrator apparatus for connection to a well tubular member for imparting longitudinal vibrations thereto, said vibrator apparatus comprising:

• a vibrator section including a member adapted to be connected to an elongated well tubular member for transferring vibrations thereto;
• a support section disposed between said vibrator section and a wellhead structure for supporting said apparatus on said wellhead structure, said support section including an array of plural pressure fluid cylinder assemblies mounted on said support section and arranged in a substantially symmetrical pattern with respect to a longitudinal axis of said tubular member;
• and
• a pressure fluid circuit including a pump and a manifold for receiving pressure fluid from said pump for distributing pressure fluid to respective ones of said cylinder assemblies and for receiving pressure fluid from said cylinder assemblies, respectively.

A vibrator apparatus for connection to a well tubular member for imparting longitudinal vibrations thereto, said vibrator apparatus comprising:

• a vibrator section including a member adapted to be connected to an elongated well tubular member for transferring vibrations thereto;
• a support section disposed between said vibrator section and a wellhead structure for supporting said apparatus on said wellhead structure, said support section including an array of plural pressure fluid cylinder assemblies mounted on said support section;
• a pressure fluid circuit including a pump and a manifold for receiving pressure fluid from said pump for distributing pressure fluid to respective ones of said cylinder assemblies;
• flow control devices disposed between said cylinder assemblies and said manifold for effectively causing fluid flow through said cylinder assemblies during operation of said apparatus;
• and
• plural accumulators disposed in parallel communication with said circuit for damping at least one of pressure and flow fluctuations in said circuit.

A vibrator apparatus for connection to a well tubular member for imparting longitudinal vibrations thereto, said vibrator apparatus comprising:

• a vibrator section including a member adapted to be connected to an elongated well tubular member for transferring vibrations thereto;
• a support section disposed between said vibrator section and a wellhead structure for supporting said apparatus on said wellhead structure, said support section including pressure fluid support and isolation members operably supporting said vibrator section;
• and
• means for supporting said tubular member on said vibrator section for rotation with respect to said vibrator section comprising a bearing support member, a bearing assembly supported by said bearing support member and a member engaged with said bearing assembly for supporting said tubular member with respect to said vibrator apparatus for rotation with respect to said vibrator apparatus.