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Configuration No. 4

Closed system. Perforation under drawdown in horizontal well using main and backup hydraulic impact head with delayed actuating time, packer and circulating valve, opened under certain pressure. Use of the spacer (perforator frame without charge between impact head and charged perforator) is required for safe operations.

  1. Production tubing
  2. Shortened connection pipe
  3. Packer
  4. Circulating valve
  5. Shaped charge perforator
  6. Hydraulic impact head with time delay