Pressure activated proportional flow bypass tool assembly

A tool assembly, comprising:

• a main body having a proximal end with a proximal opening and a distal end opposite said proximal end with a distal opening,
• wherein said main body being comprised of an off-set through bore in fluid connection with said proximal opening and said distal opening, a mounting body portion adjacent said off-set through bore, and a support portion adjacent said off-set through bore opposite said mounting body portion;
• a cavity within said mounting body portion, said cavity being comprised of cavity surface, a first cavity end between said cavity surface and said proximal end, and a second cavity end between said cavity surface and said distal end;
• a flow restrictor means in fluid connection with a pressure inlet port;
• and
• a bypass assembly removably attached to said main body within said cavity and having an inner side and an outer side opposite said inner side,
• wherein said cavity surface is comprised of:
• a cavity attachment means;
• a channel surface centered over said off-set through bore;
• a first fluid bypass port longitudinally aligned on a center axis of said channel surface, said first fluid bypass port being in fluid connection with said off-set through bore;
• a second fluid bypass port longitudinally aligned on said center axis of said channel surface, said second fluid bypass port being in fluid connection with said off-set through bore, said first fluid bypass port being positioned a set distance from said second fluid bypass port;
• and
• said pressure inlet port aligned with said fluid bypass ports and placed either between said first fluid bypass port and said second cavity end or between said second fluid bypass port and said second cavity end, said pressure inlet port being in fluid connection with said off-set through bore,
• wherein said bypass assembly comprises:
• a bypass housing having a proximal bypass end and a distal bypass end opposite said proximal bypass end;
• a bypass attachment means made integral with said bypass housing;
• a pressure chamber at said distal bypass end and having a distal end cap and a pressure stop, said distal end cap being set against said distal bypass end, said pressure stop extending from said distal end cap toward said proximal bypass end;
• a piston having a first piston end and a second piston end opposite said first piston end, said second piston end facing said pressure chamber;
• a spring assembly having a proximal end cap at said proximal bypass end and a spring member engaged with said first piston end;
• a first fluid bypass hole extending through said bypass housing and having a first fluid bypass inner opening and a first fluid bypass outer opening opposite said first fluid bypass inner opening;
• a second fluid bypass hole extending through said bypass housing and having a second fluid bypass inner opening and a second fluid bypass outer opening opposite said second fluid bypass inner opening;
• and
• a pressure inlet hole extending through said inner side of said bypass assembly to said pressure chamber,
• wherein said piston has a first piston flow hole and a second piston flow hole, said first piston flow hole and said second piston flow hole being between said first piston end and said second piston end,
• wherein said first piston flow hole is positioned at said set distance from said second piston flow hole,
• wherein said piston has a first piston position corresponding to said first fluid bypass outer opening in sealed connection to said off-set through bore by said piston and said second fluid bypass outer opening in sealed connection to said off-set through bore by said piston,
• wherein said piston has a second piston position corresponding to said first fluid bypass outer opening in fluid connection with said off-set through bore through said first piston flow hole and said second fluid bypass outer opening in fluid connection with said off-set through bore through said second piston flow hole,
• wherein said first fluid bypass hole is aligned with said first fluid bypass port, said second fluid bypass hole being aligned with said second fluid bypass port,
• wherein said first fluid bypass hole is positioned said set distance from said second fluid bypass hole, and
• wherein said pressure chamber is aligned with said pressure inlet port, said pressure chamber being in fluid connection with said pressure inlet port and said off-set through bore through said pressure inlet hole.