Abstract: 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.

Abstract: An electronic initiation system for use with a firing panel may include an input connector, a plurality of electronic ignition circuits (EICs) operably coupled together in series, and an indicator operably coupled to an output of each EIC of the plurality of EICs. A first EIC of the plurality of EICs may be operably coupled to the input connector. The indicator is configured to generate an indication in response to an output of an EIC of the plurality of EICs satisfying a predetermined condition.

Abstract: A perforating gun housing includes a housing wall extending between a first housing portion defining a chamber, and a second housing portion defining a bore. The housing wall includes a first outer surface, a second outer surface, and a face extending substantially perpendicularly to the second outer surface between the first outer surface and the second outer surface. A perforating gun tool string comprises a first gun housing coupled to a second gun housing, wherein each gun housing includes a housing wall having a first threaded portion and a second threaded portion for attachment to an adjacent gun housing. A method for assembling a wellbore tool string includes providing a first gun housing and a second gun housing, inserting the second end of the first gun housing into the first end of the second gun housing, and rotating the first gun housing relative to the second gun housing.

Abstract: A firing head assembly is described. The firing head assembly includes a tubular housing, upper piston and lower pistons, and a compressible member arranged within a lumen of the tubular housing and positioned between the upper and lower pistons. According to an aspect, the assembly includes a safety assembly that includes a sleeve having a zigzag shaped slot therein. The safety assembly may include a key that radially extends from a surface of one of the pistons, through the zigzag shaped slot. The distance between the upper and lower pistons may be adjusted by adjusting a pressure inside the tubular housing and a second pressure outside the tubular housing. The upper and lower pistons may function to operatively adjust the arrangement of the key within the zigzag shaped slot to activate the firing head assembly to either trigger an explosive reaction or to not trigger the explosive reaction.

Abstract: According to some embodiments, devices, systems, and methods of connecting and sealing against the introduction of liquids a receiver booster and a detonating cord in an exposed perforating gun are disclosed. According to an aspect, an encapsulated receiver booster is disclosed. The encapsulated receiver booster has an effective connection and seal with a detonating cord and the seal provides consistent integrity against the introduction of liquid, occupies a relatively small amount of space around the connection between the detonating cord and receiver booster, and is configured for use with exposed perforating gun systems. According to other aspects, associated exposed perforating gun systems and methods for connecting and sealing a receiver booster and a detonating cord are generally disclosed.

Abstract: A power charge and method for actuating a wellbore tool with a power charge. The power charge may include a first volume containing a first energetic material and a second volume containing a second energetic material positioned within the first energetic material. The second energetic material may be a faster burining material compared to the first energetic material. The wellbore tool may include a power charge cavity, an initiator positioned in an initiator holder adjacent to the power charge within the power charge cavity, and a gas diverter channel for directing to an expansion chamber gas pressure generated by combustion of the power charge, to actuate the wellbore tool. The method may include inserting the initiator into the initatior holder within the power charge cavity and initiating combustion of the first energetic material and the second energetic material.

Abstract: A drone conveyance system for deploying drones into an oil or gas wellbore is described. The system includes a platform, a drone magazine, a platform receiver, a conveyance, and a wellhead receiver. A drone magazine contains a plurality of the drones and selectively releases/feeds the drones into the platform receiver. More than one drone magazine, each containing different drone types, may supply drones to the platform receiver such that different drones may be ordered for disposal into the wellbore. The platform receiver prepared the drones to be moved from the platform to the wellhead by the conveyance. The wellhead receiver accepts the drones from the conveyance and prepares each received drone for dropping into the wellbore via the wellhead.

Abstract: Components for a perforation gun system are provided including combinations of components including a self-centralizing charge holder system and a bottom connector that can double as a spacer. Any number of spacers can be used with any number of holders for any desired specific metric or imperial shot density, phase and length gun system.

Abstract: A positioning device includes a shaped charge holder. A plurality of shaped charge receptacles formed in the shaped charge holder are configured to arrange a plurality of shaped charges in a desired orientation. The shaped charges are detonated by a detonator in response to an initiation signal. The positioning device may be secured in a perforating gun module, with vertical and horizontal movement of the positioning being inhibited in the perforating gun module.

Abstract: Pressure-isolating bulkhead structures with integrated selective electronic switches circuitry are provided. The pressure-isolating bulkhead structure may be a single unit having the integrated electronic switch circuitry, as well as an electrical connector that includes at least one of a wire and a pin contact. Such integrated selective electronic switch circuitry may be fashioned within a self-contained, inner pressure-isolating enclosure body. Such inner pressure-isolating enclosure body may be produced about the selective electronic switch circuitry such that the inner pressure-isolating enclosure body and switch circuitry are produced as a unit, which can be easily placed within a variety of bulkhead structures, and subsequently within a perforating gun.

Abstract: A detonating cord for using in a perforating gun includes an explosive layer and an electrically conductive layer extending around the explosive layer. The electrically conductive layer is configured to relay a communication signal along a length of the detonating cord. In an embodiment, a protective jacket extends around the electrically conductive layer of the detonating cord. The detonating cord may be assembled in a perforating gun to relay a communication signal from a top connector to a bottom connector of the perforating gun, and to propagate a detonating explosive stimulus along its length to initiate shaped charges of the perforating gun. A plurality of perforating guns, including the detonating cord, may be connected in series, with the detonating cord of a first perforating gun in communication with the detonating cord of a second perforating gun.

Abstract: A single use setting tool for actuating a tool in a wellbore includes an inner piston extending through a central bore of an outer sleeve. The inner piston has a seal adapter portion and a piston cavity housing an initiator holder for receiving a push-in detonator. A gas diverter channel is open to and extends from the piston cavity through an annular wall of the piston, to transfer gas pressure to a gas expansion chamber for stroking the outer sleeve. A method of actuating a wellbore tool with a single use setting tool includes inserting an initiator into the initiator holder, attaching a tandem seal adapter to the seal adapter portion of the inner piston, and relaying an electrical signal to a line-in portion of the initiator, to initiate the initiator. The single use setting tool may be used in a wellbore tool string.

Abstract: A system and a method of providing a reliable and consistent time delay in an oil and gas exploration/recovery device inserted in a bore hole is presented. The reliability and consistency of the time delay is a result of the use of electronic circuitry in determining the length of time delay. The system and method presented provide a time delay unit that is modular/commoditized, facilitating quick and easy integration of each component of the time delay unit in the field. Further, assembly and disassembly of the time delay unit is easily accomplished in the field and may be designed to operate with standard percussion and detonation elements.

Abstract: A drone conveyance system and a wellhead receiver for deploying drones into an oil or gas wellbore includes a platform, a drone magazine, a platform receiver, a conveyance, and a wellhead receiver. The wellhead receiver prepares the drone to be inserted into the wellbore via the wellhead. Preparation of the drone to be inserted into the wellbore includes adjusting the physical conditions surrounding the drone to approximate the physical conditions in the wellbore. The preparation may be performed using fluid inputs and outputs connected to a compartment of the wellhead receiver. Other preparation processes may also take place in the wellhead receiver such as assuring the appropriate drone is being inserted, that the drone has been programmed appropriately, that safety devices have been deactivated and charging an onboard power supply of the drone.

Abstract: According to some embodiments, a bottom-fire perforating drone for downhole delivery of a wellbore tool, and associated systems and methods, are disclosed. In an aspect, the wellbore tool may be a plurality of shaped charges that are arranged in a variety of configurations, including helically and in one or more single radial planes around a perforating assembly section, and detonated in a bottom-up sequence when the bottom-fire perforating drone reaches a predetermined depth in the wellbore. In another aspect, the shaped charges may be received in shaped charge apertures within a body of a perforating assembly section, wherein the shaped charge apertures are respectively positioned adjacent to at least one of a receiver booster, detonator, and detonating cord for directly initiating the shaped charges.

Abstract: A shaped charge closure member for encapsulating a slotted shaped charge is described. The closure member includes a body having a closed upper portion, and a lower portion opposite the upper portion. The closure member has first and second side walls, a front wall, and a back wall. Each wall tapers from the lower portion to the upper portion. A skirt having a substantially rectangular cross-section extends vertically away from each of the walls, at the lower portion of the body. The skirt engages with an open portion of a slotted shaped charge case, thereby forming an encapsulated slotted shaped charge. The encapsulated slotted shaped charge may be used in an exposed perforating gun system.

Abstract: A holder for shaped charges is shown and described. The charge holder facilitates a high shot density for use with a perforating gun. The shaped charges are arranged to direct explosive force axially outward from a perforating gun. The plurality of radially spaced charges are designed to result in an annular ring of blast effect in any metal tubing associated with the oil/gas extraction operation as well as any concrete conduits in which the tubing is disposed.

Abstract: An initiator head assembly may include a body and an electrical contact component positioned proximal to the body. The body may include a head extending from a base, and a platform extending from the head, and the body may be injection molded as a unitary component. The electrical contact component may include a line-in portion positioned proximal to the platform and a ground portion positioned proximal to the head. The electrical contact component may be formed integrally with the body such that it is anchored in a fixed position in the body. An initiator for a perforating gun assembly may include the initiator head assembly and a shell coupled to the initiator head assembly.