| 摘要 |
Apparatus and method for perforating a well by providing in said well a first tool string comprising a tubing string (24), a first firing head (52) responsive to fluid pressure in said tubing string, a second firing head (58) responsive to fluid pressure in said tubing string, and a perforating gun (32) operatively coupled proximate one end to said first firing head and operatively coupled proximate second end to said firing head; providing a second tool string (26) in said well; establishing a pressure in said well adjacent said zone to be perforated through use of said second tool string; and causing said first and second firing heads to be actuated by establishing a fluid pressure in said first tool string. |
