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