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