An apparatus and method for locking a detonating cord against a shaped charge.

An apparatus and method for locking a detonating cord against a shaped charge.

An explosive device composed of an auxiliary flux compression generator operating to produce a high intensity magnetic field to seed a primary flux compression generator The auxiliary flux compression generator has a first section with a magnetic field supplied by a cylindrical permanent magnet array, the first section is composed of a helical winding having a prescribed pattern configured to convert explosive energy into magnetic energy that will be used as seed magnetic field for the primary flux compression generator.

A reactive armor unit has a first explosion center and a second explosion center, the unit being configured with a predetermined distance between the first and the second explosion centers.

A shaped charge for use in a well perforating tool includes a jet blocker disposed in an apex of a parabolic or cone-shaped liner. The jet blocker limits the velocity and/or length of a jet that forms upon discharging an explosive in the shaped charge. The jet blocker may include an inert cast-cure type of material such as an epoxy or a flowable plastic that can be readily inserted into an existing shaped charge to fill an external concavity in the liner to any desired height. The height and material selected for the jet blocker determines the degree to which the penetration achieved by the shaped charge is limited, and thus, determines which targeted annulus in the wellbore may be penetrated in operation.

A detonation wavefront controller for a linear shaped charge, comprising a first part and a second part. The first part comprises: a detonator holder, and a first aperture having a first width and a shape which is substantially a cyclic polygon, substantially an ellipse or substantially circular. The second part comprises: a second aperture having a second width larger than the first width. With the first part at least partly received within the second part, the first part is moveable relative to the second part to configure the detonation wavefront controller at least between: a first configuration with a first distance between the first aperture and the second aperture, and a second configuration with a second distance between the first aperture and the second aperture, the second distance larger than the first distance.

A detonation wavefront controller for a linear shaped charge, comprising a first part and a second part. The first part comprises: a detonator holder, and a first aperture having a first width and a shape which is substantially a cyclic polygon, substantially an ellipse or substantially circular. The second part comprises: a second aperture having a second width larger than the first width. With the first part at least partly received within the second part, the first part is moveable relative to the second part to configure the detonation wavefront controller at least between: a first configuration with a first distance between the first aperture and the second aperture, and a second configuration with a second distance between the first aperture and the second aperture, the second distance larger than the first distance.

A stand for vertically aligning borehole charges on non-level surfaces. The stand has a support base. A ball and socket assembly includes a socket portion connected to the support base and a ball portion disposed in the socket portion. The socket portion includes a grip interface to press against the ball portion. A body is connected to the ball portion. A clamp is attached to the socket portion at an interface of the ball and socket assembly between the socket portion and the ball portion. The body is configured to contain a shaped explosive charge for making a borehole. The ball and socket assembly is substantially hollow. The clamp adjusts compression of the ball and socket assembly.

A frame for a shaped charge has a body with a cylindrical configuration, the body having a central passage along an axis thereof and a track extending in a direction parallel to the axis for installing and removing a shaped charge, the track having a snap structure. The frame provides a slide-in snap-in charge receptacle for a shaped charge.

A non-detonable shaped charge capable of becoming detonable upon activation. The shaped charge may be utilized for use with a perforating gun in oilfield applications. In this regard, during transport and other handling in advance of reaching the application site, the charge may be non-detonable. However, upon an intentionally directed activation, such as through heating, the shaped charge may be detonable.