What is TCP and when is it used?
Tubing Conveyed Perforating is also known as TCP. It is a method of lowering and positioning perforating carriers in a well and detonating from surface using a mechanical style of detonation system. This type of perforating is used when wells formation conditions or orientation demands that absolute well control is maintained. In some cases the well may need to be perforated when it is in an under balanced condition. This means that the pressure from the weight of the fluid column is less than that expected in the formation. Upon perforation no fluids from the well bore will invade into the formation and possibly damaging the hydrocarbon zone. Conversely a well may be perforated in an overbalanced state. Here a well is purposely flood upon perforating to create a flushed zone. Lastly when a well is severely deviated it may not permit conventional perforating tools to be lowered into position. This would limit the usage potential of those tools. TCP is accomplished by use of mechanical
