Development of Type 73 GH Equal Hole Perforating Charge

In order to solve the problem of the perforation gun not being centered in the casing due to the gravity of the perforation gun during unconventional horizontal well perforation operations in oil and gas reservoirs, and the uneven perforation of the casing hole after perforation. A 73type GH equal aperture perforating projectile with a conical top with equal wall thickness and a curved lower inner wall is designed. Through numerical simulation analysis, it is found that the jet diameter formed by the perforating bullet is thick and the gradient is small, which can achieve uniform and consistent casing aperture after perforation when the perforating gun is not in the center. Through ground target testing, the average penetration depth of the perforating bullet is 534.3mm, and the average casing aperture is 10.4mm, indicating that it has the characteristics of large aperture deep penetration. The consistency deviation of aperture is 4%, which verifies that the numerical simulation results are consistent with the actual results, achieving the effect of equal aperture. The results show that the type 73GH equal hole perforating charge can effectively reduce the rupture pressure when perforating horizontal wells.