The fiber aggregates are useful, for example, for {HEAD ~ flowback control} in {TAIL ~ wellbores} and reservoirs 
The fiber aggregates are useful , for example , for { HEAD ~ flowback control } in { TAIL ~ wellbores } and reservoirs
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH