US 9,810,048 B2
Perforating gun
Jozef Balun, Paderborn (DE)
Assigned to Benteler Steel/Tube GmbH, Paderborn (DE)
Filed by BENTELER STEEL/TUBE GMBH, Paderborn (DE)
Filed on Sep. 23, 2015, as Appl. No. 14/863,070.
Prior Publication US 2017/0081948 A1, Mar. 23, 2017
Int. Cl. E21B 43/116 (2006.01)
CPC E21B 43/116 (2013.01) 19 Claims
OG exemplary drawing
 
1. A perforating gun, comprising:
a) an outer tube which is a tubular housing of the perforating gun with a wall thickness and an outer surface, and the outer tube having a plurality of first recesses on the outer surface, wherein each first recess has a first depth that is less than the wall thickness of the outer tube, and
b) an inner tube within the outer tube which is a charge holder that holds a plurality of shape charges,
wherein each first recess corresponds to one shape charge and each shape charge has an opening directed to a corresponding first recess so that after detonation of the shape charges a high pressure and a high speed jet is generated and directed to the corresponding first recess,
the outer tube having a plurality of second recesses on the outer surface, wherein each second recess has a second depth that is less than the wall thickness of the outer tube, wherein each second recess forms a continuous edge with the outer surface of the outer tube.