| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 089100150 | WELL PERFORATORS | 40 |
| 20080307951 | SAFETY VENT DEVICE - A perforating gun system having a relief system for relieving high pressure during unexpected high temperature or situations that may produce rupture of the gun body. The relief system may be responsive either to high temperatures as well as high pressures. In the high temperature situation, the relief system has a fuseable link that melts thereby allowing movement of a piston to open vent communication between the inside of a gun body in the ambient conditions. Similarly, a pressure device includes a piston responsive to pressure that moves under high pressure within the gun body thereby exposing a port enabling communication between the inside of the gun body and the ambient conditions. | 12-18-2008 |
| 20090217810 | Method and Device for Detonating an Explosive Charge - A method for detonation of a plug device in a fluid environment is described, which is in contact with a body, such as an ignition pellet, and it is characterised in that a number of pressure increases are exerted against the plug device, whereby each pressure increase causes a movement of a piston ( | 09-03-2009 |
| 20100000397 | High Density Perforating Gun System Producing Reduced Debris - A perforating system has a perforating module comprising a unitary body of explosive. The explosive is contained within a non-explosive casing, or liner, having formed indentations and a cover thereover. The indentations, which will transform into explosively formed penetrators (EFP's) upon detonation, have a perimeter shape that allows for improved packing density, e.g., a hexagonal perimeter, which results in relatively little “dead space” wherein no perforating penetrators are generated. In operation, the module provides a relatively dense shot pattern and substantially reduced amount of post-detonation debris that could clog the perforations and/or require remedial clean-up or repeat perforation. | 01-07-2010 |
| 20100011944 | Perforation Gun System for Sealing Penetration Holes - A perforation gun includes an external gun barrel in the interior of which perforators are located which can be ignited via a fuse extending through the gun barrel and which, after ignition, pierce the gun barrel with perforation holes. A sliding tube or a swellable two-component foam is provided which automatically closes the perforation holes. The swellable two-component foam can be provided in a cartridge located inside the gun barrel and can be broken up by the ignited fuse, thereby allowing foam to escape from the cartridges, allowing it to swell and obliterate the perforation holes. The sliding tube can be displaced after perforation by an adjusting device by at least the diameter of the perforation hole, the sliding tube being located coaxially between the perforators and the gun barrel. | 01-21-2010 |
| 20100212480 | Explosive well tool firing head - A firing head embodiment of the invention confines a connected capacitance cartridge, explosive detonator, and wireline connection switch within an independent, cylindrical housing tube that is environmentally capped at both ends by threaded closures for secure transport to a well site. | 08-26-2010 |
| 20100263523 | RETENTION MEMBER FOR PERFORATING GUNS - A perforating gun includes a charge tube having shaped charges affixed thereto. Each shaped charge includes a radially outward pointing post adapted to receive a detonator cord. A retention member installed on the post provides a compressive force that energetically couples the detonator cord to the post. The radially outermost portion of the retention member is radially flush with or radially recessed relative to the radially outermost portion of each post. In one embodiment, the retention member has a rounded medial portion, a central opening and a pair of locking tabs that point radially inward to the central opening. Each post may include a slot for receiving the detonator cord and a circumferential groove that is adapted to receive the locking tabs. | 10-21-2010 |
| 20100269676 | WELLBORE PERFORATING DEVICES - Wellbore perforating devices are disclosed. In one example, a wellbore perforating device includes a plurality of shaped charges and a holder that holds the plurality of shaped charges so that upon detonation the charges intersect a common plane extending transversely to the holder. | 10-28-2010 |
| 20110056362 | ENERGETIC MATERIAL APPLICATIONS IN SHAPED CHARGES FOR PERFORATION OPERATIONS - A shaped charge includes a cup-shaped casing defining an interior volume; a liner located within the interior volume; an explosive disposed between the liner and the casing; and a reactive material disposed between the liner and the casing. A method for generating a dynamic overbalance inside a wellbore includes disposing a perforation gun in the wellbore; and detonating a shaped charge in the perforation gun, wherein the shaped charge includes a cup-shaped casing defining an interior volume, a liner located within the interior volume, an explosive disposed between the liner and the casing, and a reactive material disposed between the liner and the casing. | 03-10-2011 |
| 20110271823 | Electronic Selector Switch for Perforation - A circuit includes a line input for receiving a line power. The circuit further includes a line output for transmitting the line power. The circuit further includes a next-gun-detect output and a next-gun-detect input. The circuit further includes a first detonator connection and a second detonator connection, the second detonator connection being connected to a ground. The line input is coupled to the first detonator connection through a one-polarity-pass component that only allows power of a first polarity to pass. The line input is coupled to the first detonator connection through a detonate-enable switch circuit that is coupled to the next-gun-detect output and the line input. The detonate-enable switch passes power only if (a) the next-gun-detect output is not coupled to the next-gun-detect input and (b) power of a second polarity has previously been applied to the line input while the next-gun-detect output is not coupled to the next-gun-detect input. | 11-10-2011 |
| 20110283872 | Downhole severing tool - The pipe cutting capacity of a explosive pipe cutter may be improved by mixing the explosive material with powdered metal to increase the explosive gas density or directing colliding shock fronts from opposite axial directions against a disc of metal having a shock impedance substantially corresponding to the shock impedance capacity of the explosive material | 11-24-2011 |
| 20120198988 | PERFORATING GUN HAVING SELF-CLOSING PENETRATION HOLES - A perforating gun having an outer gun barrel, inside of which an inner barrel is coaxially arranged, carrying perforators that can be ignited by means of a detonating cord leading through the gun barrel and, after ignition, pierce the gun barrel in order to form penetration holes, wherein means are provided for automatically closing the penetration holes after the blast, said means being a swellable medium. In order to ensure that the swellable medium requires little space in the perforating gun and can be easily integrated into the perforating gun, the swellable medium is disposed in a laminary manner inside the perforating gun. | 08-09-2012 |
| 20130118342 | EXPLOSIVE CARRIER END PLATES FOR CHARGE-CARRIERS USED IN PERFORATING GUNS - Explosive carrier end plates for charge-carriers utilized in guns for the perforation of petroleum producing wells. Each gun is mounted coupled vertically with similar guns inside the casing of the well, and each gun is a hollow cylinder in the interior of which there is a corresponding tubular carrier that has multiple peripheral mountings for a radial placement of the shaped-charges. The carrier is mounted in the gun by means of a top insulating end plate that has a retractable electrical spring contact capable of pushing upwards, and a bottom insulating end plate. The end plates have a centering clip for anchoring in a respective window of the cylindrical wall of the carrier. Both end plates have a single removable insert axially fitted between two tubular inserts, which present reciprocal guiding and positioning means for a pin keyway slot to enable mounting with the end plate. A pin and groove are provided between the peripheral cylindrical walls of end plates and the gun's wall, for anchoring in and positioning the end plate to guide the exit of each jet of the shaped charges. | 05-16-2013 |
| 20130145924 | STRUCTURE FOR GUNPOWDER CHARGE IN COMBINED FRACTURING PERFORATION DEVICE - This invention provides a structure for gunpowder charge for charging gunpowders of different rates in combined fracturing perforation devices. The structure for gunpowder charge is convenient to mount and transport. In one embodiment, said structure for gunpowder charge comprises an inner gunpowder box located between adjacent perforating charges in the charge frame of a perforation device, and an outer gunpowder box attached to the outer wall of the charge frame, wherein said outer gunpowder box comprises one or two box units ( | 06-13-2013 |
| 20130228066 | Resistor-based Ignition System for a Core Gun - A core gun igniter assembly features a resistor under 50 ohms that is welded rather than soldered to a circuit. Upon energizing the circuit, the resistor creates the heat needed to directly set off the propellant to directly drive the core barrel into the surrounding formation to obtain the desired core sample. The use of a titanium powder ignition mix on a nichrome wire with its attendant safety risks is eliminated. | 09-05-2013 |
| 20130340599 | REUSABLE PERFORATING GUN AND PORT PLUG - A perforating gun of unique port and port plug architecture. The gun may include ports with separate guide channel and engagement regions for receiving a port plug. Once more, the engagement region may be offset from the central axis of the guide channel and overall port. Thus, the engagement region of the port as well as the matching engaging mechanism of the port plug may be out of the direct line of fire when a perforating application takes place. The same may be true of a seal for the port plug. Therefore, achieving adequate engagement and sealing of the port with such plugs may be more effective, for example, in spite of the guide channel and other portions of the gun carrier beginning to exhibit post-perforation bulging. | 12-26-2013 |
| 20140041515 | Well Perforating Apparatus - An improved well perforating apparatus comprising: a one or more rounded scallops in a perforating gun body of a perforating gun; said one or more rounded scallops comprising a cut away portion of said perforating gun body having a bore portion and a rim; and said rim comprising a bore angle between said bore portion and said perforating gun body. | 02-13-2014 |
| 20140053715 | COMPOSITE PERFORATION DEVICE WITH SCALLOPS ON THE INNER WALL - The present invention relates to a composite perforating device with scallops on its inner wall to improve the depth of penetration in the oil reservoir during perforation of oil and gas well. In one embodiment, the scallops on the inner wall of the gun body are located at a position corresponding to the open end of a perforating charge. In one embodiment, the scallop may have a stepped-cylindrical or truncated-conical inner peripheral surface and a conical or flat bottom surface. Alternatively, the scallop may have an inner conical surface. The scallops on the inner wall of the gun body increased the burst heights of the perforating charges such that the penetration depth of the perforating device is increased. | 02-27-2014 |
| 20140060295 | STRUCTURE FOR GUNPOWDER CHARGE IN MULTI-FRAC COMPOSITE PERFORATING DEVICES - This invention provides a structure for gunpowder charge in multi-frac composite perforation devices that is easy to assemble and transport while the charge volume of gunpowder is increased. In one embodiment of the present invention, an triplet outer gunpowder box is attached onto the outer wall of the charge frame and comprises one middle gunpowder box charged with gunpowder of certain burning rate, and two side-hung gunpowder boxes charged with gunpowder of another burning rate. The two side-hung gunpowder boxes are separately located on the two sides of the middle gunpowder box and are connected with the middle gunpowder box as a unit. The middle gunpowder box is located at a position corresponding to the perforating charge, and has an inner groove for orienting the perforating charge and a through hole through which the jet flow passes. | 03-06-2014 |
| 20140076132 | Extended Jet Perforating Device - An explosive charge assembly comprises a casing, a first liner, a second liner, a first explosive charge disposed between the casing and the first liner, and a second explosive charge disposed between the first liner and the second liner. The first liner and the second liner are configured to form a single jet upon detonation of the first explosive charge and the second explosive charge. | 03-20-2014 |
| 20140083283 | High Density Perforating Gun System Producing Reduced Debris - A perforating system has a perforating module comprising a unitary body of explosive. The explosive is contained within a non-explosive casing, or liner, having formed indentations and a cover thereover. The indentations, which will transform into explosively formed penetrators (EFP's) upon detonation, have a perimeter shape that allows for improved packing density, e.g., a hexagonal perimeter, which results in relatively little “dead space” wherein no perforating penetrators are generated. In operation, the module provides a relatively dense shot pattern and substantially reduced amount of post-detonation debris that could clog the perforations and/or require remedial clean-up or repeat perforation. | 03-27-2014 |
| 20140096670 | Perforating gun drop sub - A perforating gun assembly comprises a drop sub linking the firing head to the gun tube or tubes. The drop sub includes a 360° perimeter shaped charge explosive for severing pipe having an axial bore to accommodate a pass-through of the perforation charge detonation chord. Consequently, the severing tool is detonated by the traverse of a detonation wave along the chord length to disconnect the perforating gun prior to detonation of the perforation charges. | 04-10-2014 |
| 20140123841 | BI-DIRECTIONAL SHAPED CHARGES FOR PERFORATING A WELLBORE - A shaped charge assembly for perforating a wellbore tubular and a subterranean formation intersected by a wellbore may include a first shaped charge and a second shaped charge disposed on an outer surface of the wellbore tubular. The first shaped charge points radially outward toward the formation, and the second shaped charge points radially inward toward the wellbore tubular. | 05-08-2014 |
| 20140137723 | Bottom hole firing head and method - Detonation of a perforating gun is initiated by engagement of the lower distal end of the gun assembly against a bottom hole bore plug. A fluid pressure actuated firing head is initiated by well fluid that is pressurized by a free piston having an integral rod projecting from the distal end of the gun assembly. The piston is displaced against a closed fluid volume when the projecting rod engages the bore plug. | 05-22-2014 |
| 20140331852 | Perforating Gun Apparatus for Generating Perforations having Variable Penetration Profiles - A perforating gun apparatus includes a carrier gun body having a plurality of jet target regions. A first set of the jet target regions has a first resistance to jet penetration and a second set of the jet target regions has a second resistance to jet penetration. A charge holder is positioned within the carrier gun body. A plurality of shaped charges is supported by the charge holder. A first set of the shaped charges is oriented to have discharge ends aligned with the first set of the jet target regions and a second set of the shaped charges is oriented to have discharge ends aligned with the second set of the jet target regions such that firing the first set of the shaped charges creates perforations having a first penetration profile and firing the second set of the shaped charges creates perforations having a second penetration profile. | 11-13-2014 |
| 20150027302 | PERFORATING GUN ASSEMBLY - A perforating gun assembly includes a gun carrier and a gun connected thereto. The perforating gun is positioned external to a flow passage of the perforating gun carrier. The perforating gun is activated by pressure in the flow passage defined by the perforating gun carrier. The perforating gun may be positioned in a slot or pocket defined in a wall of the perforating gun carrier. | 01-29-2015 |
| 20150096434 | SUB-CALIBER SHAPED CHARGE PERFORATOR - A shaped charge for use in perforating a wellbore that includes a shaped charge case, a liner in the case, and explosive between the liner and case. Detonating the explosive inverts the liner to form a metal jet that forms a perforation in a side wall of the wellbore. The outer diameter of the liner open end is set radially inward from the inner diameter of the case opening to define an annular gap. Providing a gap between the liner and case allows more control of distribution of material of the liner into the jet. | 04-09-2015 |
| 20150316360 | SHAPED CHARGE AND METHOD OF MODIFYING A SHAPED CHARGE - Some embodiments are directed to a shaped charge liner including an apex end and a base end and defining a main liner axis that passes through the apex and base ends, the liner being rotationally symmetric about the main liner axis wherein the liner has discrete rotational symmetry about the main liner axis. | 11-05-2015 |
| 20150337635 | Alignment System for Perforating Gun - An apparatus for restraining the movement of a gun charge holder within a gun tube including a snap ring with an alignment end that engages an end fitting and the gun tube simultaneously, the snap ring further comprising a grounding hole to facilitate the grounding of the electronics and detonation devices within the gun charge holder. | 11-26-2015 |
| 20150376991 | PERFORATING GUN WITH A HOLDING SYSTEM FOR HOLLOW CHARGES FOR A PERFORATING GUN SYSTEM - A perforating gun of a perforating gun system is provided including hollow charges positioned within a holding device. The holding device includes holes in which the hollow charges are inserted and secured. In an embodiment, the holes are arranged on at least one helix. In a further embodiment, the perforating gun provides collapsible and fragmentable components that minimize debris remaining in a wellbore upon detonation of the charges. | 12-31-2015 |
| 20160061572 | PERFORATING GUN AND DETONATOR ASSEMBLY - According to an aspect, a perforating gun assembly and a detonator assembly is provided. The detonator assembly includes at least a shell, means for selective detonation, and more than one electrically contactable component that is configured for being electrically contactably received by the perforating gun assembly without using a wired electrical connection, but rather forms the electrical connection merely by contact with at least one of the more than one electrically contactable components. A method of assembling the perforating gun assembly including the detonator assembly is also provided. | 03-03-2016 |
| 20160097264 | DETONATING CORD CLIP - An apparatus for use with a perforating device includes a section having a window and a detonating cord disposed in a bore of the section. The apparatus may include a detonator configured to generate a high order detonation; and a clip connecting the detonator to the detonating cord. The clip may be formed as a ribbon having a base and a prong extending from opposing sides of the base. The base has an opening for receiving the detonator. The prongs have biased ends to secure the detonating cord against a face of the detonator. | 04-07-2016 |
| 20160130902 | Explosive Tubular Cutter And Devices Usable Therewith - Explosive cutter assemblies and methods include a liner having a single unitary body, and an explosive charge disposed within the liner. The explosive charge includes a continuous unitary body of explosive material having a first area disposed in association with an inner surface of the liner and a second area extending from the center of the assembly to the first area. A detonator can be used to ignite the second area of explosive material, causing propagation of a detonation to the first area, which in turn causes deformation of the liner and projection of the liner toward a target to form a cut. An adaptor sub having a detonator within can be inserted into the cutter assembly to secure the assembly together, position the detonator in association with the explosive material, and engage a conduit usable to raise and lower the cutter assembly and transmit a detonation signal. | 05-12-2016 |
| 20160168961 | PERFORATION GUN COMPONENTS AND SYSTEM | 06-16-2016 |
| 089100151 | Method of making | 7 |
| 20080202325 | PROCESS OF IMPROVING A GUN ARMING EFFICIENCY - A process is disclosed for assembling a gun tube for use in a perforating system. At a first location, which is not the site where perforating operations are to be conducted, the gun tube is completely assembled except for an initiating device. After transporting the gun tube to the site where perforating operations are to be conducted, an initiator is connected and installed via port in the gun tube. | 08-28-2008 |
| 20080295678 | PERFORATION GUN WITH INTEGRAL DEBRIS TRAP APPARATUS AND METHOD OF USE - The improved perforation gun of the present invention includes an outer gun barrel, which is used in conjunction with an inner movable charge carrier or an inner movable sleeve to trap virtually all of the debris created by the firing of the perforation gun. This elimination of debris reduces costly operational problems in both gravel pack and horizontal well completions. It also improves the production from a perforated underground hydrocarbon bearing formation since there is no debris to potentially cause plugging in the well or subsequent production lines. | 12-04-2008 |
| 20100011945 | ADAPTER FOR SHAPED CHARGE CASING - A shaped charge for use with a perforating gun having an adapter that can couple the shaped charge with perforating gun systems of more than one size. An interference fit can couple the adapter to the open end of a shaped charge. The adapter includes a base section having an outer diameter exceeding the shaped charge outer diameter. The adapter larger diameter can be coupled to perforating gun systems formed to receive shaped charges whose outer diameters exceed the outer diameter of the shaped charge coupled to the adapter. Thus the adapter can couple a shaped charge to a perforating gun that might otherwise have fittings too large to accommodate the shaped charge. | 01-21-2010 |
| 20100319520 | PERFORATING GUNS WITH REDUCED INTERNAL VOLUME - A perforating device has an elongated tubular housing and a loading device supporting a plurality of shaped charges. The loading device and the shaped charges are located inside the housing. A volume reduction device is adapted to fit within the loading device and to conform to the profile of the shaped charges thereby filling open volume in the housing. | 12-23-2010 |
| 20130000472 | MULTI-LAYERED PERFORATING GUN USING EXPANDABLE TUBULARS - A perforating gun body including a first layer having a first yield strength and a second layer having a second yield strength, the second layer positioned radially inwardly from the first layer with a radial gap initially provided between the first and second layers, the second layer expanded radially to engage the first and second layers, the first and second yield strengths being dissimilar. | 01-03-2013 |
| 20130036898 | METHOD FOR MAKING A RUST RESISTANT WELL PERFORATING GUN WITH GRIPPING SURFACES - A method for perforating a well using a rust resistant well perforating gun can include disposing coatings over the rust resistant well perforating gun to prevent rust, loading a charge into a charge hole, engaging a detonation cord with the charge and an actuator, engaging the charge loading tube into the gun carrier, lowering the rust resistant well perforating gun into the well, actuating the actuator, and exploding the charge to: form a high pressure in the gap, allow jets to pierce the recesses to produce high energy pulses, and fractionate the formation using the high energy pulses. | 02-14-2013 |
| 20130291711 | Explosive Device Booster Assembly and Method of Use - An apparatus for perforating a wellbore comprises a housing, at least one perforating charge disposed within the housing, a detonation cord coupled to the at least one perforating charge, and a booster coupled to an end of the detonation cord. The booster comprises a booster body having a first end and a second end, a cavity defined within the booster body between the first end and the second end, an explosive material disposed within the cavity adjacent the first end, and a locking feature disposed adjacent the second end, where the locking feature is configured to allow the booster to engage the end of the detonation cord in a first direction and resist movement in a second direction. | 11-07-2013 |
