Hollow Charge Liners Made of Powder Metal Mixtures

Abstract

The invention relates to inserts for hollow shots made of cold pressed powder mixtures, which can, for instance be used in the oil and gas extraction industries in well blasting.

1 . Hollow charge liners made of powder metal mixtures, characterized in that they contain 1 to 16% by weight, preferably 3 to 11% by weight aluminium and/or titanium, as well as lead and one or more heavy metals and/or alloys thereof, preferably bronze, copper, tungsten, tantalum and/or molybdenum, as well as optionally graphite. 
   
   
       2 . Hollow charge liners made of powder metal mixtures according to  claim 1 , characterized in that they contain 14 to 30% by weight lead, 70 to 85% by weight tungsten and 1 to 16, preferably 3 to 11% by weight aluminium. 
   
   
       3 . Hollow charge liners made of powder metal mixtures according to  claim 1 , characterized in that they contain 14 to 30% by weight lead, 70 to 85% by weight tungsten and 1 to 16, preferably 3 to 11% by weight titanium. 
   
   
       4 . Hollow charge liners made of powder metal mixtures according to  claim 1 , characterized in that they contain 14 to 30% by weight lead, 10 to 50, preferably 10 to 30% by weight tungsten, 30 to 60, preferably 50 to 60% by weight bronze or copper or a mixture of these and 1 to 16, preferably 3 to 11% by weight aluminium. 
   
   
       5 . Hollow charge liners made of powder metal mixtures according to  claim 1 , characterized in that they contain 19.8% by weight lead, 38% by weight tungsten, 34.7% by weight bronze, 7% by weight aluminium and 0.5% by weight graphite. 
   
   
       6 . Hollow charge liners made of powder metal mixtures according to  claim 1 , characterized in that they contain 14 to 30% by weight lead, 10 to 50, preferably 10 to 30% by weight tungsten, 30 to 60, preferably 50 to 60% by weight bronze or copper or a mixture of these and 1 to 16, preferably 3 to 11% by weight titanium. 
   
   
       7 . Hollow charge liners made of powder metal mixtures according to  claim 1 , characterized in that they contain 14 to 50% by weight lead, 50 to 80% by weight bronze or copper or a mixture of these and 1 to 16, particularly preferably 3 to 11% by weight aluminium. 
   
   
       8 . Hollow charge liners made of powder metal mixtures according to  claim 1 , characterized in that they contain 14 to 50% by weight lead, 50 to 80% by weight bronze or copper or a mixture of these and 1 to 16, particularly preferably 3 to 11% by weight titanium. 
   
   
       9 . Hollow charge liners made of powder metal mixtures according to  claim 1 , characterized in that they contain 19.5% by weight lead, 73.5% by weight bronze and 7% by weight titanium. 
   
   
       10 . Method of manufacturing hollow charge liners made of powder metal mixtures according to  claim 1  by cold-pressing powder metal mixtures. 
   
   
       11 . Method according to  claim 10 , characterized in that the constituents are mixed in the appropriate fractions and pressed into the final shape by compression under sufficiently high pressure without an additional supply of heat. 
   
   
       12 . Hollow charge liners made of powder metal mixtures according to  claim 1 , manufactured by a method comprising cold-pressing the powder metal mixtures. 
   
   
       13 . A method for blasting of well drill holes, comprising blasting well drill holes using the hollow charge liners made of powder metal mixtures according to  claim 1 .