Hydraulic multiphase pump

A fluid pumping system comprising:

• a pair of substantially counter synchronous fluid pumps;
• a power fluid circuit for providing power fluid to and from the pair of fluid pumps;
• and
• an indexing circuit for regulating the fluid in the power fluid circuit, whereby the indexing circuit ensures that the pair of fluid pumps remain in substantially counter synchronous operation.

A pump system for transporting a fluidstream, the system comprising:

• a first and a second plunger, each plunger movable between an extended position and a retracted position using a fluid operated cylinder;
• a fluid power circuit for providing fluid to and from a first portion of the fluid operated cylinder;
• and
• an indexing circuit providing fluid to and from the fluid power circuit;
• whereby the indexing circuit ensures that each plunger reaches its full extended position prior to the other plunger reaching the retracted position.

A method for pumping a fluidstream comprising:

• operating a pump system including:
• a pair of substantially counter synchronous fluid pumps;
• a fluid power circuit for providing fluid to and from the pair of fluid pumps;
• an indexing circuit providing fluid to and from the fluid power circuit;
• and
• a charge circuit for providing fluid to the fluid power circuit and the indexing circuit;
• and
• biasing one of the fluid pumps as the fluid pump moves from the retracted position toward the extended position.

A method for pumping a fluidstream comprising:

• operating a pump system including:
• a pair of substantially counter synchronous fluid pumps;
• a fluid power circuit for providing fluid to and from the fluid pumps;
• an indexing circuit providing fluid to and from the fluid power circuit;
• a charge circuit for providing fluid to the fluid power circuit and the indexing circuit;
• and
• an acceleration valve in selective communication with the fluid power circuit and the indexing circuit;
• and
• ensuring that each fluid pump reaches its full extended position prior to the other fluid pump reaching the retracted position.

A method for increasing efficiency while pumping a fluidstream comprising:

• operating a pump system including:
• a pair of substantially counter synchronous fluid pumps;
• a fluid power circuit for providing fluid to and from the fluid pumps;
• an indexing circuit providing fluid to and from the fluid power circuit;
• and
• a power saving circuit for providing fluid to and from a power saving cylinder;
• and
• transferring energy between the fluid pumps.

A method for pumping a fluidstream comprising:

• operating a pump system including:
• a pair of substantially counter synchronous fluid pumps;
• a fluid power circuit for providing fluid to and from the fluid pumps;
• an indexing circuit providing fluid to and from the fluid power circuit;
• a charge circuit for providing fluid to the fluid power circuit and the indexing circuit;
• and
• at least one valve assembly for selective communication from the indexing circuit to the power fluid circuit;
• and
• ensuring that each fluid pump reaches its full extended position prior to the other fluid pump reaching the retracted position.

A method for pumping a fluidstream comprising:

• operating a pump system including:
• a pair of substantially counter synchronous fluid pumps;
• a fluid power circuit for providing fluid to and from the fluid pumps;
• an indexing circuit providing fluid to and from the fluid power circuit;
• a charge circuit for providing fluid to the fluid power circuit and the indexing circuit;
• an accumulator for storing fluid;
• and
• a relief valve;
• and
• ensuring that each fluid pump reaches its full extended position prior to the other fluid pump reaching the retracted position.