Coupling low-pressure manifold passages in hydraulic fracturing systems

A fluid coupler for fluidly coupling a first passage and a second passage respectively carrying a first fluid and a second fluid for a hydraulic fracturing operation, the fluid coupler comprising:

• a first conduit and a second conduit, each of the first conduit and the second conduit defining a primary end and a secondary end, the primary end of the first conduit configured to be connected to the first passage to selectively fluidly couple the first conduit with the first passage, the primary end of the second conduit configured to be connected to the second passage to selectively fluidly couple the second conduit with the second passage;
• a connector conduit fluidly coupled between the secondary end of the first conduit and the secondary end of the second conduit;
• a first coupler valve positionable between the first passage and the primary end of the first conduit;
• and
• a second coupler valve positionable between the second passage and the primary end of the second conduit, wherein, in an open state of the first coupler valve and the second coupler valve,
• fluid coupling between the first passage and the second passage is established by the fluid coupler, and
• a transmission of one of the first fluid and the second fluid into at least a portion of the other of the first passage and the second passage is facilitated to selectively increase a quantity or a proportion of one of the first fluid or the second fluid within a fracturing fluid for the hydraulic fracturing operation.

A manifold assembly for a hydraulic fracturing system, the manifold assembly comprising:

• a high-pressure section;
• a low-pressure section including a first passage and a second passage respectively carrying a first fluid and a second fluid, each of first fluid and the second fluid configured to be pumped into the high-pressure section to form a fracturing fluid, the fracturing fluid suppliable into a well bore for performing a hydraulic fracturing operation;
• a fluid coupler for fluidly coupling the first passage and the second passage, the fluid coupler including:
• a first conduit and a second conduit, each of the first conduit and the second conduit defining a primary end and a secondary end, the primary end of the first conduit connected to the first passage to selectively fluidly couple the first conduit with the first passage, the primary end of the second conduit connected to the second passage to selectively fluidly couple the second conduit with the second passage;
• a connector conduit fluidly coupled between the secondary end of the first conduit and the secondary end of the second conduit;
• a first coupler valve positioned between the first passage and the primary end of the first conduit;
• and
• a second coupler valve positioned between the second passage and the primary end of the second conduit, wherein, in an open state of the first coupler valve and the second coupler valve,
• fluid coupling between the first passage and the second passage is established by the fluid coupler, and
• a transmission of one of the first fluid and the second fluid into at least a portion of the other of the first passage and the second passage is facilitated to selectively increase a quantity or a proportion of one of the first fluid or the second fluid within the fracturing fluid for the hydraulic fracturing operation.