Slotting Perforation Technology (SPT) - method of opening casing, cement and productive formation in oil and gas wells by cutting of continuous deep longitudinal slots along the wellbore.
For creation of slots is used a special SPT tool/equipment, which cuts slots by rectilinear and constant movement of abrasive cutting jets along the wellbore without moving tubing.
Main idea of SPT technology:
opening a large casing’s area and creation of a large drainage penetration’s zone in the productive forma-tion (for good hydrodynamic connection well with the productive formation)
unloading annular circular compressive stress in the near wellbore zone (for increases of permeability and porosity, and accordingly increasing the productive inflow.
Slotting perforation Technology is the only method, supposed to unload annular compressive stress conditions around the wellbore
In classical Slotting Perforation Technology (SPT) the whole process of cutting the casing, cement and formation carried out in a single indivisible cycle without addition chemical or mechanical additives.
Classical SPT is absolutely environmentally friendly method (components: sand and water).
Slotting Perforation Technology (SPT) is the is the most effective method of opening productive formation through the casing, and cement sheath with slicing long and deep longitudinal slots along the borehole.
Slotting Perforation Technology (SPT) is an absolutely reasonably efficient Technology for produce infow in newly drilled wells, and for successful completion/recompletion of old, dry and low-producing oil and gas wells.
Slotting Perforation Technology (SPT) is the only method, supposed to unload annular compressive stress conditions around the wellbore.
Slotting Perforation Technology (SPT) technology refers to basic methods of initial opening casing, cement and productive formation (as some kinds of drilling, gun perforation, cumulative perforation, abrasive jet’s-point perforation, and some types of slotting perforations), and not refers to stimulation (optional) methods (as acoustic, acid, air, cavitation, chemical, electrical, frequency, gas, hydraulic, laser, magnetic, plasma, pneumatic, pulse, resonance, shock, steam, stress (overstress), temperature, thermal, ultrasonic, vacuum, vibration, wave etc.)