Shaped charge assembly, explosive units, and methods for selectively expanding wall of a tubular

A method of selectively expanding at least a portion of a wall of a tubular via a shaped charge tool, comprising:

• assembling the shaped charge tool comprising a housing and an explosive material forming a first explosive unit located within the housing, wherein the first explosive unit is liner-less;
• positioning a detonator adjacent to the first explosive unit;
• positioning said shaped charge tool within the tubular;
• and
• actuating said detonator to ignite the explosive material causing a shock wave that travels radially outward to impact the tubular at a first location and expand said at least a portion of the wall of the tubular radially outward without perforating or cutting through said at least a portion of the wall, to form a protrusion of the tubular at said at least a portion of the wall, wherein the protrusion extends into an annulus between an outer surface of the wall of the tubular and an inner surface of a wall of another tubular or a formation.

A method of selectively expanding at least a portion of a wall of a tubular at a well site via a shaped charge tool comprising a housing, the method comprising:

• receiving an unassembled set of explosive units at the well site, each explosive unit comprising explosive material and being liner-less, and each explosive unit being divided into two or more segments that, when joined together, form the each explosive unit;
• joining, at the well site, the segments of each explosive unit together to form the each explosive unit;
• positioning each explosive unit within the housing of the shaped charge tool;
• positioning a detonator adjacent to one of the each explosive units;
• positioning said shaped charge tool within the tubular;
• and
• actuating said detonator to ignite the explosive material causing a shock wave that travels radially outward to impact the tubular at a first location and expand said at least a portion of the wall of the tubular radially outward without perforating or cutting through said at least a portion of the wall, to form a protrusion of the tubular at said at least a portion of the wall, wherein the protrusion extends into an annulus between an outer surface of the wall of the tubular and an inner surface of a wall of another tubular or a formation.

A method of selectively expanding a wall of a tubular via an expansion tool comprising explosive units spaced axially along a length of the expansion tool, the method comprising:

• positioning the expansion tool within the tubular;
• simultaneously actuating a first explosive unit and a second explosive unit to cause a shock wave from the first explosive unit and a shockwave from the second explosive unit to travel radially outward to impact the tubular at a first location and a second location, respectively, wherein each impact expands at least a portion of the wall of the tubular radially outward without perforating or cutting through said at least a portion of the wall, to form a protrusion of the tubular, wherein each protrusion extends into an annulus between an outer surface of the wall of the tubular and an inner surface of a wall of another tubular or a formation;
• and
• subsequently actuating a third explosive unit to cause a shock wave that travels radially outward to impact the tubular at a third location between the first location and the second location to expand a portion of the wall between the first location and the second location radially outward without perforating or cutting through said portion of the wall, to form a third protrusion of the tubular, wherein the third protrusion extends into the annulus.