Shaped charge casing cutter
OwnerWilliam T. Bell, James G. Rairighinventors
Life of this patent
Estimating the term…
Abstract
A shaped charge casing cutter is constructed with the cutter explosive formed into radial section modules aligned in a toroidal cavity between a pair of housing plates. The center sections of the plates are contiguously aligned with opposite parallel surfaces of a center disc. The plate rims are offset from respective center disc planes in opposite directions from each other to form a toroidal cavity. The toroidal cavity is enclosed by a circumferential belt secured to said plate rims. V-grooved shaped charge explosive in the form of multiple pi sections is distributed about the cavity to intimately contact a pair of frusto-conical liners.
Claims17
A shaped charge pipe cutter comprising:
- first and second substantially circular housing plates, each having a planar rim and planar center section aligned about a common axis, the respective planes of said rim and center section having substantially parallel offsets;
- a substantially planar center disc having a perimeter channel for confining detonation cord between opposite parallel face planes, at least one transverse aperture through said disc between said face planes, explosive material disposed within said transverse aperture between opposite junction points with said perimeter channel, a detonator aperture intersecting said transverse aperture along said common axis;
- the respective housing plate center sections aligned contiguously against respective center disc faces with oppositely directed rim offsets to form a substantially toroidal cavity between said rims;
- a circumferential belting ring secured to said planar rims to maintain a parallel alignment between said planar rims;
- and
- a shaped charge explosive disposed within said substantially toroidal cavity to discharge a substantially radial cutting jet through said belting means.
A shaped charge casing cutter comprising:
- a pair of substantially circular housing plates, each plate having a rim in a first plane and a center section in a second plane, the respective planes of said rim and center section being substantially parallel and offset from each other;
- a substantially planar center disc having opposite parallel face planes, a perimeter channel between said face planes for confining a circumferential detonation cord, an aperture through said disc between said face planes and between a pair of junction points with said perimeter channel, said aperture for receipt of explosive material a detonator aperture penetrating said disc substantially normal to a disc face plane along an axis common to said pair of substantially circular housing plates and center disc;
- the center section of each substantially circular housing plate aligned contiguously against respectively opposite substantially planar center disc faces with said rims offset in opposite directions to form a substantially toroidal cavity between said rims;
- a circumferential belt secured to said rims of each substantially circular housing plate to complete an enclosure of said substantially toroidal cavity and maintain a parallel alignment between said rims;
- and
- a shaped charge explosive disposed within said substantially toroidal cavity to discharge a substantially radial cutting jet through said circumferential belt.
Dependencies are inferred from the claim text.