Abstract: A downhole assembly includes an isolation tool disposable downhole of a perforation gun. The isolation tool includes a tubular body having a seat, and an occluding device supported on the tubular body in an unseated position, and movable to a seated position on the seat in response to at least one of a firing operation of the perforation gun and a selected fluid velocity through the isolation tool. Fluid communication through the isolation tool is allowed in uphole and downhole directions in the unseated position of the occluding device, and blocked in the downhole direction in the seated position of the occluding device.

Abstract: A method of detecting flow in a tubular includes disposing an identifier within a component, the component including a seat configured to receive a plug member thereon, the identifier disposed separately from the seat; arranging the component within the tubular to position the identifier at a selected location within the tubular; flowing fluid through the tubular and subsequently through the component within the tubular and past the identifier within the component; releasing at least trace amounts of the identifier into the fluid when the fluid flows past the identifier; and detecting the at least trace amounts of the identifier in the fluid at a location uphole of the component.

Abstract: A downhole assembly includes an isolation tool disposable downhole of a perforation gun. The isolation tool includes a tubular body having a seat, and an occluding device supported on the tubular body in an unseated position, and movable to a seated position on the seat in response to at least one of a firing operation of the perforation gun and a selected fluid velocity through the isolation tool. Fluid communication through the isolation tool is allowed in uphole and downhole directions in the unseated position of the occluding device, and blocked in the downhole direction in the seated position of the occluding device.

Abstract: A fluid flow location identification positioning system includes, at least one component that is attachable within a tubular at any user selectable location within the tubular, and an identifier in operable communication with the at least one component configured to be eroded by fluid that flows therepast, at least trace amounts of the identifier are releasable into fluid that erodes the identifier

Abstract: A fluid flow location identification system includes, a tubular having at least a first opening and a second opening therethrough, wherein the first component is degraded at least by fluid flowing from an outside of the tubular to an inside of the tubular through the first opening and the second component is degraded at least by fluid flowing from an outside of the tubular to the inside of the tubular through the second opening. Trace amounts of a first identifier are releasable into fluid degrading the first component, trace amounts of a second identifier are releasable into fluid degrading the second component. The trace amounts of the first identifier and the trace amounts of the second identifier are detectable in fluid after having comingled to allow determination of whether each of the first opening and the second opening have fluid flowing therethrough.