Lubrication delivery for pump packing assembly

A manifold assembly configured to deliver lubricant to a stuffing box of a fluid end of a reciprocating pump, the manifold assembly comprising:

• tubing disposed around at least a portion of a bore of the stuffing box in which a packing assembly is disposed, the tubing being configured to divert the lubricant to multiple radial flow paths circumferentially spaced around the bore, wherein the multiple radial flow paths lead to an interior surface of the packing assembly, and the lubricant is configured to decrease friction between the interior surface of the packing assembly and a reciprocating component moving along the interior surface;
• and
• a plurality of injectors that fluidly couple the tubing to the multiple radial flow paths, wherein the plurality of injectors or the multiple radial flow paths meter flows of the lubricant at different flow rates based on a friction gradient across the interior surface of the packing assembly.

A lantern ring for a packing assembly configured to be installed in a stuffing box of a fluid end of a reciprocating pump, the lantern ring comprising:

• a main body with a lateral surface disposed between an upstream end of the lantern ring and a downstream end of the lantern ring;
• and
• a plurality of holes circumferentially spaced around the lateral surface, each hole of the plurality of holes defining a radial flow path to an interior surface of the lantern ring that is configured to direct a lubricant to an interior surface of the packing assembly, the lubricant being configured to decrease friction between the interior surface of the packing assembly and a reciprocating component moving along the interior surface, wherein at least two holes of the plurality of holes have different diameters so that the at least two holes meter flows of the lubricant at different flow rates.