Pump down fiber system, method and tools for multilateral wells

A downhole system, comprising:

• a plurality of conduits configured to interconnect, via stab-in connections, to form a plurality of fiber channels extending along respective portions of a wellbore,
• wherein the plurality of fiber channels includes at least an upper fiber channel extending uphole from a wellbore junction, a lower main fiber channel extending downhole from the wellbore junction into a main bore, and a lower lateral fiber channel extending downhole from the wellbore junction into a lateral bore;
• a first fiber optic line configured to extend through the upper fiber channel and into the lower main fiber channel to a first downhole position;
• a second fiber optic line configured to extend through the upper fiber channel and into the lower lateral fiber channel to a second downhole position;
• a plurality of plugs having at least a first plug and a second plug,
• wherein the first plug is secured to a first leading end of the first fiber optic line,
• wherein the second plug is secured to a second leading end of the second fiber optic line, and
• wherein each plug of the plurality of plugs is configured to move along a respective fiber channel in response to fluid pressure in the respective fiber channel to drive a corresponding fiber optic line along the respective fiber channel;
• and
• a diverter assembly disposed at a junction between the upper fiber channel, the lower main fiber channel, and the lower lateral fiber channel,
• wherein the diverter assembly is configured to selectively direct the first plug and the first fiber optic line to move from the upper fiber channel into the lower main fiber channel in a first state and direct the second plug and the second fiber optic line to move from the upper fiber channel into the lower lateral fiber channel in a second state.

A downhole system, comprising:

• a plurality of conduits configured to interconnect, via stab-in connections, to form a plurality of fiber channels extending along respective portions of a wellbore,
• wherein the plurality of fiber channels includes at least an upper fiber channel extending uphole from a wellbore junction, a lower main fiber channel extending downhole from the wellbore junction into a main bore, and a lower lateral fiber channel extending downhole from the wellbore junction into a lateral bore;
• a first fiber optic line configured to extend through the upper fiber channel and into the lower main fiber channel to a first downhole position;
• a second fiber optic line configured to extend through the upper fiber channel and into the lower lateral fiber channel to a second downhole position;
• a plurality of plugs having at least a first plug and a second plug,
• wherein the first plug is secured to a first leading end of the first fiber optic line,
• wherein the second plug is secured to a second leading end of the second fiber optic line, and
• wherein each plug of the plurality of plugs is configured to move along a respective fiber channel in response to fluid pressure in the respective fiber channel to drive a corresponding fiber optic line along the respective fiber channel;
• and
• a diverter assembly disposed at a junction between the upper fiber channel, the lower main fiber channel, and the lower lateral fiber channel,
• wherein the diverter assembly is formed within a junction assembly disposed at least partially within the junction, and
• wherein the diverter assembly includes a shuttle valve configured to selectively direct the first plug and the first fiber optic line to move from the upper fiber channel into the lower main fiber channel in a first shuttle valve position and direct the second plug and the second fiber optic line to move from the upper fiber channel into the lower lateral fiber channel in a second shuttle valve position.