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