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US 9,810,048 B2Granted
Perforating gun
AssigneeBenteler Steel/Tube GmbH
InventorJozef Balun
Life of this patent
Estimating the term…
Abstract
The invention relates to a perforating gun used for hydraulic fracturing applications in a wellbore and has an outer tube having several recesses of a second kind. The recesses of a second kind are configured to absorb shock waves from a shape charge in the perforating gun to reduce the numbers of cracks that form on the perforating pun. In some embodiments, the recesses of a second kind have a variety of shapes and sizes to aid in the absorption of shock waves.
Claims19
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.
1 more element
Dependencies are inferred from the claim text.