Fracturing sequential operation method using signal responsive ported subs and packers

摘要: The method allows a pressure test of string with external packers without having the packer setting apparatus exposed to tubing so that at later time and lower than pressure, can be set annulus opened piston references low chamber. in any desired order. Thereafter, circulation sub triggered open allow fracking start. Fracking each interval beyond first an uphole direction accomplished pumping ever increasing balls seats associated sliding sleeves In cemented completions, after test, ported on timer or other signal combination bridge plug perforating gun location.