power tongprecision strain gagepredestuction zoneprefored wire ropepremature setting of cementpressure bombpressure build uppressure build up curvepressure build up methodpressure chamberpressure collapsepressure compensationpressure diskpressure drillingpressure drivepressure feedpressure gradientpressure headpressure logpressure maintenancepressure multiplierpressure observation wellpressure pumppressure recorsderpressure regulatorpressure restorantionpressure surgepressure valvepressure volume temperatureprestressed concrete structureprimary cementationprimary exploitationprimary fieldprimary intersticeprimary migrationprimary oil fieldprimary porosityprimary reservsprimary waterprime moverprime v a pomppriming of pumpprobable recoverable gas reservesprobable recovesprobeproduce v an fieldproducing depthproducing gas wellproducing oil wellproducing rate