A tandem seal adapter (TSA) for use with a wellbore tool may include a TSA body including a first end and a second end opposite the first end in an axial direction, a bore extending through the TSA body from the first end to the second end, an electrical contact assembly provided within the bore, the electrical contact assembly being configured to provide electrical connectivity through the bore. The electrical contact assembly may include a bulkhead provided within the bore. An axial position of a maximum outer diameter of the TSA body may overlap with the bulkhead in the axial direction. A portion of the bore overlapping in the axial direction with an entirety of the TSA body having an outer diameter equal to the maximum outer diameter may have a constant bore diameter.

A method and apparatus for providing a universal plug in cartridge detonator capability in box-by-box perforating guns.

An electrical connector apparatus for use in a downhole tool comprising a housing, a contact screw within outer threads and inner threads, a contact plunger within the inner bore of the housing and a second cylinder protruding from the first cylinder. The contact spring is located between the contact plunger and the contact screw and pre-loads the contact plunger within the housing.

An electrical connector apparatus for use in a downhole tool comprising a housing, a contact screw within outer threads and inner threads, a contact plunger within the inner bore of the housing and a second cylinder protruding from the first cylinder. The contact spring is located between the contact plunger and the contact screw and pre-loads the contact plunger within the housing.

A method, system, and apparatus for restraining a firing pin using a bushing for use in a downhole switch that is armed using the explosive energy of a previously detonated shaped charge.

A method, system, and apparatus for restraining a firing pin using a bushing for use in a downhole switch that is armed using the explosive energy of a previously detonated shaped charge.

An electronic fuze for a projectile, the electronic fuze including at least one electronic board arranged in a housing of the body of the projectile, the electronic board being encapsulated in a block of protective material. The electronic board is secured to at least one support rod partially encapsulated in the block of protective material. The support rod is inserted through a hole in a wall integral with the body of the projectile, and the support rod is secured to the wall by a fastening device. A first decoupling devices is interposed between the block of protective material and the wall and a second decoupling device is interposed between the fastening device and the wall. The electronic board is located towards a front part of the projectile and the wall is located towards a rear part of the projectile.

An electronic fuze for a projectile, the electronic fuze including at least one electronic board arranged in a housing of the body of the projectile, the electronic board being encapsulated in a block of protective material. The electronic board is secured to at least one support rod partially encapsulated in the block of protective material. The support rod is inserted through a hole in a wall integral with the body of the projectile, and the support rod is secured to the wall by a fastening device. A first decoupling devices is interposed between the block of protective material and the wall and a second decoupling device is interposed between the fastening device and the wall. The electronic board is located towards a front part of the projectile and the wall is located towards a rear part of the projectile.

A perforating gun may include a gun carrier extending in an axial direction and a tandem seal adapter (TSA). The gun carrier having a maximum outer carrier diameter. The TSA may include a first TSA region having a first TSA outer diameter, a second TSA region having a second TSA outer diameter, and a shoulder surface formed between an outer surface of the first TSA region and an outer surface of the second TSA region. The second TSA outer diameter may be larger than the first TSA outer diameter and smaller than the maximum outer carrier diameter. A portion of the gun carrier may abut with the shoulder surface.

A perforating gun may include a gun carrier extending in an axial direction and a tandem seal adapter (TSA). The gun carrier having a maximum outer carrier diameter. The TSA may include a first TSA region having a first TSA outer diameter, a second TSA region having a second TSA outer diameter, and a shoulder surface formed between an outer surface of the first TSA region and an outer surface of the second TSA region. The second TSA outer diameter may be larger than the first TSA outer diameter and smaller than the maximum outer carrier diameter. A portion of the gun carrier may abut with the shoulder surface.