Downhole tool for creating evenly-spaced perforation tunnels
AssigneeHalliburton Energy Services, Inc.
InventorBrenden Michael Grove
Life of this patent
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Abstract
A downhole tool for perforating a borehole includes a gun body and charges arranged in a helix around the gun body and evenly spaced from both a nearest neighbor along the helix and a nearest neighbor in an adjacent wrap of the helix. Further, placement of the charges is based on a specified diameter of the borehole and specified charge density.
Claims18
A downhole tool for perforating a borehole at a location in the borehole having a wall with a diameter, comprising:
- a gun body;
- and
- charges arranged in a helix around the gun body and spaced to produce perforation tunnels in the wall at the location when detonated that are evenly spaced on the wall from both any nearest neighbor along the helix and a nearest neighbor in any adjacent wrap of the helix, and wherein placement of the charges is based on a specified charge density and a phase angle between each charge that is determined based on the diameter of the wall at the location.
A method for manufacturing a downhole tool used to perforate a borehole at a location in the borehole having a wall with a diameter, comprising:
- determining a position for each of multiple apertures formed radially along a helix around a gun body and spaced to produce perforation tunnels in the wall at the location that are evenly spaced on the wall from both any nearest neighbor along the helix and a nearest neighbor in any adjacent wrap of the helix, wherein the positions are based on a specified charge density and a phase angle between each aperture that is determined based on the diameter of the wall at the location;
- forming the gun body with the multiple apertures at the determined positions;
- and
- placing charges in a central cavity of the gun body and aligning the charges with the multiple apertures.
A method for perforating a formation from within a borehole through the formation at a location having a wall with a diameter, comprising:
- conveying a downhole tool into the borehole, wherein the downhole tool comprises:
- a gun body;
- and
- charges arranged in a helix around the gun body and spaced to produce perforation tunnels in the wall at the location that are evenly spaced on the wall from both any nearest neighbor along the helix and a nearest neighbor in any adjacent wrap of the helix, the spacing of the charges being based on a specified charge density and a tease angle between each charge that is determined based on the diameter of the wall at the location;
- and
- detonating the charges to form evenly spaced perforation tunnels in the wall.
Dependencies are inferred from the claim text.