Detonator with fused head retention features

Abstract

A detonator may include an outer hull and a first holder contact and a second holder contact at least partially disposed within the outer hull. The first holder contact and the second holder contact may be configured to electrically connect with a first fuse contact and a second fuse contact of a fuse head. The detonator may further include a retention feature configured to maintain a position of the first holder contact and the second holder contact with respect to the first fuse contact and the second fuse contact

What is claimed is: 
     
         1 . A detonator for use with a fuse head having a first fuse contact and a second fuse contact, the detonator comprising:
 an outer hull;   a first holder contact and a second holder contact at least partially disposed within the outer hull, the first holder contact and the second holder contact configured to electrically connect with the first fuse contact and the second fuse contact of the fuse head; and   a retention feature configured to maintain a position of the first holder contact and the second holder contact with respect to the first fuse contact and the second fuse contact.   
     
     
         2 . The detonator of  claim 1 , wherein the retention feature is configured to maintain the position of the first and second holder contacts with respect to the first and second fuse head contacts when a solder-free connection connects the first and second holder contacts to the first and second fuse contacts. 
     
     
         3 . The detonator of  claim 1 , further comprising a fuse head holder is disposed around at least a portion of the holder block and configured to surround at least a portion of the fuse head. 
     
     
         4 . The detonator of  claim 3 , wherein the retention feature includes a retention cap configured to couple with the fuse head holder. 
     
     
         5 . The detonator of  claim 3 , wherein the fuse head holder is integrally formed with a casing of the detonator. 
     
     
         6 . The detonator of  claim 1 , wherein the retention feature comprises a retention block disposed between the fuse head holder and an ignition capable material. 
     
     
         7 . The detonator of  claim 1 , comprising a casing coupled to the outer hull. 
     
     
         8 . The detonator of  claim 7 , wherein the casing is coupled to the outer hull with a crimp. 
     
     
         9 . The detonator of  claim 7 , further comprising one or more electronic components enclosed by the casing. 
     
     
         10 . The detonator of  claim 1 , wherein the retention feature includes at least one indentation in the outer hull. 
     
     
         11 . The detonator of  claim 10 , wherein the at least one indentation in the outer hull comprises a crimp. 
     
     
         12 . The detonator of  claim 1 , wherein the fuse head includes a cross member extending between the first fuse contact and the second fuse contact and the retention feature includes a hook extending from the contact holder and configured to couple with the cross member. 
     
     
         13 . The detonator of  claim 1 , wherein the first fuse contact and the second fuse contact include an opening and the retention feature includes a hook formed in the first holder contact or the second holder contact, wherein the hook is configured to couple with the opening. 
     
     
         14 . A method for assembling a detonator, the method comprising:
 inserting a fuse head into a holder contact of the detonator via an opening in a fuse head holder of the detonator;   coupling a retention cap to the fuse head holder of the detonator with the fuse head inserted into the holder contact; and   disposing an outer hull over the retention cap and at least a portion of the fuse head holder.   
     
     
         15 . The method of  claim 14 , further comprising securing the outer hull to a casing of the detonator. 
     
     
         16 . The method of  claim 15 , wherein securing the outer hull to the casing of the detonator includes crimping the outer hull. 
     
     
         17 . The method of  claim 14 , coupling the retention cap to the fuse head holder of the detonator via one or more coupling features of the fuse head holder and one or more coupling features of the retention cap. 
     
     
         18 . The method of  claim 17 , wherein the one or more coupling features of the fuse head holder form a snap-fit with the one or more coupling features of the retention cap. 
     
     
         19 . The method of  claim 14 , further comprising disposing the detonator within a wellbore tool. 
     
     
         20 . A system comprising:
 a wellbore tool;   a detonator disposed in the wellbore tool, wherein the detonator includes:
 an outer hull; 
 a first holder contact and a second holder contact at least partially disposed within the outer hull, the first holder contact and the second holder contact configured to electrically connect with a first fuse contact and a second fuse contact of a fuse head; 
 a retention feature configured to maintain a position of the first holder contact and the second holder contact with respect to the first fuse contact and the second fuse contact.