{HEAD ~ Control release capsules} comprising a breaker contained within a enclosure member are employed to break {TAIL ~ fracturing fluids} 
are employed to break
{ HEAD ~ Control release capsules } comprising a breaker contained within a enclosure member are employed to break { TAIL ~ fracturing fluids }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL