Perforator charge with a case containing a reactive material

Abstract

A perforator charge includes a case formed of a material blend that includes a reactive material that is activated during explosive detonation of the perforator charge. An explosive and a liner are contained in the case, with the liner to collapse in response to detonation of the explosive.

1 . A perforator charge comprising:
 a case formed of a material blend that includes a reactive material that is activated during explosive detonation of the perforator charge;   an explosive contained in the case; and   a liner contained ill the case, the liner to collapse in response to detonation of the explosive.   
   
   
       2 . The perforator charge of  claim 1 , wherein the reactive material when activated during explosive detonation of the perforator charge produces a pressure pulse in a wellbore interval. 
   
   
       3 . The perforator charge of  claim 2 , wherein the reactive material when activated produces a dynamic overbalance condition. 
   
   
       4 . The perforator charge of  claim 1 , wherein the reactive material is activated by at least one selected from the following: a detonation gas, a wellbore fluid, and another reactive material. 
   
   
       5 . The perforator charge of  claim 1 , wherein the reactive material comprises a powdered reactive material. 
   
   
       6 . The perforator charge of  claim 1 , wherein the reactive material is at least one material selected from the following: titanium, a titanium alloy, titanium mixed with another metal, a titanium alloy mixed with another metal, and nickel aluminum. 
   
   
       7 . The perforator charge of  claim 1 , wherein the material blend of the case further comprises a non-reactive material mixed with the reactive material. 
   
   
       8 . The perforator charge of  claim 7 , wherein the non-reactive material is selected from the following: tungsten, copper, tin, lead, and bismuth. 
   
   
       9 . The perforator charge of  claim 7 , wherein the non-reactive material provides enhanced density and strength for the case. 
   
   
       10 . The perforator charge of  claim 7 , wherein the non-reactive material and reactive material are compacted to form the case. 
   
   
       11 . The perforator charge of  claim 1 , wherein the material blend comprises a powdered material blend. 
   
   
       12 . A perforating gun comprising:
 a carrier; and   at least one perforator charge mounted to the carrier, wherein the at least one perforator charge comprises:
 a case formed of a material blend that includes a reactive material that is activated in an explosive detonation environment generated by the perforator charge; 
 an explosive contained in the case; and 
 a liner contained in the case, the liner to collapse in response to detonation of the explosive. 
   
   
   
       13 . The perforating gun of  claim 12 , wherein the material blend further comprises a non-reactive material mixed with the reactive material, the non-reactive material to provide density and green strength. 
   
   
       14 . The perforating gun of  claim 12 , wherein the at least one perforator charge comprises at least one capsule perforator charge. 
   
   
       15 . The perforating gun of  claim 12 , wherein the at least one perforator charge comprises at least one non-capsule perforator charge. 
   
   
       16 . The perforating gun of  claim 12 , wherein the carrier comprises a carrier strip. 
   
   
       17 . The perforating gun of  claim 12 , wherein the reactive material is activated by at least one selected from the following: detonation gases and a wellbore fluid. 
   
   
       18 . The perforating gun of  claim 12 , wherein the reactive material comprises at least one material selected from the following: titanium, a titanium alloy, titanium mixed with another metal, a titanium alloy mixed with another metal, and nickel aluminum. 
   
   
       19 . A method for use in a wellbore, comprising:
 lowering a perforating tool into the wellbore, wherein the perforating tool comprises at least one perforator charge including a case that contains an explosive, wherein the case is formed of a material blend including a reactive material; and   activating the at least one perforator charge, wherein the reactive material of the at least one perforator charge is activated during detonation of the at least one perforator charge to create a corresponding pressure pulse.   
   
   
       20 . The method of  claim 19 , wherein the pressure pulse causes generation of a dynamic overbalance condition in an interval of the wellbore. 
   
   
       21 . The method of  claim 20 , further comprising:
 performing at least one of the following in presence of the dynamic overbalance condition: fluid injection, transient overbalance generation, and fracturing.   
   
   
       22 . The method of  claim 19 , wherein the reactive material comprises at least one material selected from the following: titanium, a titanium alloy, titanium mixed with another metal, a titanium alloy mixed with another metal, and nickel aluminum.