Active energy-absorbing shock absorber for perforation combined well testing

An active energy-absorbing shock absorber for perforation combined well testing, comprising:

• a first energy-absorbing mechanism circumferentially arranged;
• a second energy-absorbing mechanism for absorbing a detonation load;
• and
• an axial-force cushioning mechanism;
• wherein the first energy-absorbing mechanism comprises a gun body, a gun head, a gun tail joint, a support frame, an energy-absorbing filling layer and a detonation mechanism;
• the gun head is provided at a first end of the gun body;
• the gun tail joint is provided at a second end of the gun body;
• the support frame is provided inside the gun body;
• the energy-absorbing filing layer is provided between an outer side of the support frame and an inner side of the gun body;
• the energy-absorbing filling layer is made of a foamed aluminum material;
• and the detonation mechanism is provided inside the support frame, and is provided between the gun head and the gun tail joint;
• the second energy-absorbing mechanism comprises an intermediate connecting cylinder, an outer cylinder, a limiting step, a movable impact head, a support base, a hydraulic buffer mechanism, a piston rod, an energy-absorbing spring and an inner cavity piston;
• the intermediate connecting cylinder and the outer cylinder are provided on a side of the gun tail joint away from the gun head;
• the movable impact head is provided inside the intermediate connecting cylinder through the limiting step;
• the hydraulic buffer mechanism is provided between the intermediate connecting cylinder and the outer cylinder through the support base;
• the movable impact head is provided with the piston rod penetrating through the support base;
• the energy-absorbing spring is sleevedly provided on a part of the piston rod between the movable impact head and the support base;
• an end of the piston rod extends into the hydraulic buffer mechanism, and is provided with the inner cavity piston;
• and
• the axial-force cushioning mechanism comprises a housing, a guide mechanism, a buffer shaft and a multi-stage buffer spring;
• a side of the outer cylinder away from the intermediate connecting cylinder is provided with the housing;
• the buffer shaft is provided at an end inside the housing through the guide mechanism;
• and the multi-stage buffer spring is provided on the buffer shaft.