{HEAD ~ This invention} provides an apparatus and process for producing heavy crude oil from a subterranean formation penetrated by {TAIL ~ a well bore} 
{ HEAD ~ This invention } provides an apparatus and process for producing heavy crude oil from a subterranean formation penetrated by { TAIL ~ a well bore }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL