7020results about "Blasting" patented technology

A primer composition that includes red phosphorus having an acid scavenger and a polymer thereon. The primer composition includes at least one other component that is substantially free of lead. The other component is at least one oxidizer, or at least one oxidizer and at least one of at least one secondary explosive composition and at least one energetic binder. The primer composition optionally includes at least one element having an ionic charge to ionic radius ratio of 4 or of 8, such as magnesium, zirconium, aluminum, silicon, titanium, tungsten, alloys thereof, and combinations thereof. The red phosphorus and the at least one oxidizer are present in the primer composition at approximately stoichiometric amounts. An ordnance element including the primer composition is also disclosed.

New systems and methods have been invented for explosively forming openings, ledges, windows, holes, and lateral bores through tubulars such as casing, which openings may, in cerain aspects, extend beyond the casing into a formation through which a wellbore extends. In certain aspects openings (e.g. ledges, initial, or completed windows) in wellbore tubulars (e.g. tubing or casing) are made using metal oxidizing systems, water jet systems, or mills with abrasive and / or erosive streams flowing therethrough and / or therefrom.

A cartridge assembly for use with a perforating system having a contact terminal that connects to a perforating signal line when inserted into a receptacle end of a perforating gun. A detonator may be included in an end of the cartridge assembly for initiating a detonating cord in the perforating gun. The cartridge assembly is a modular unit that replaces the manual connections made when assembling a string of perforating guns. The cartridge assembly may optionally include a controller switch for controlling current flow through the cartridge assembly.

A blasting system facilitates the actuation of a plurality of programmable detonators according to a desired blasting pattern, to cause the discharge of a plurality of associated charges, by downloading to the detonators blasting information that can be automatically determined by a portable handheld unit that incorporates a positional detecting device, such as a GPS device. The blasting information for any given detonator can be determined by the handheld unit as a function of the distance and the direction of the movement of the unit to the detonator, and / or by the actual GPS location while at the site of the detonator. This automatic determination of blasting information, and particularly the delay times, based on the movement of the unit to the detonator, eliminates error prone human calculations of the delay times needed for multiple detonators at a blasting site. This simplifies the operations and procedures needed for achieving a desired blasting pattern, without sacrificing safety or quality.

A shaped charge includes a charge case; an explosive disposed inside the charge case; and a liner for retaining the explosive in the charge case, wherein the liner comprises a material reactive with a component of an earth formation. A method for perforating in a well includes disposing a perforating gun in the well, wherein the perforating gun comprises a shaped charge having a charge case, an explosive disposed inside the charge case, and a liner for retaining the explosive in the charge case, wherein the liner includes a material that can react with a component of an earth formation; detonating the shaped charge to form a perforation tunnel in a formation zone; and allowing the material comprising the liner to react with the component of the earth formation.

A system includes a well tool for deployment in a well, a controller, and a link coupled between the controller and the well tool. The well tool comprises plural control units, each of the plural control units having a microprocessor and an initiator coupled to the microprocessor. Each microprocessor is adapted to communicate bi-directionally with the controller. The controller is adapted to send a plurality of activation commands to respective microprocessors to activate the respective control units. Each activation command containing a unique identifier corresponding to a respective control unit.

Wireless detonator assemblies (51-59) in use, form a cross-communicating network of wireless “detonator assemblies, such that communication of each wireless detonator assembly (57-59) with an associated blasting machine (50) can occur either directly, or via relay of signals (61-69) between other wireless detonator assemblies (51-56) in the network. Wireless detonator assemblies (51-59) can disseminate information (such as status information, identity information, firing codes, delay times and environmental conditions) among all of the wireless detonator assemblies in the network, while compensating for signal transmission relay delays at nodes in the network, thereby enabling the wireless detonator assemblies to detonate the explosive charges in accordance with the delay times. Various wireless detonator assemblies and corresponding blasting apparatus are disclosed and claimed. Methods of blasting using the wireless detonator assemblies and blasting apparatus are also disclosed and claimed.

A perforating gun having a charge case with a boss element partially circumscribing Optionally the pair of bosses may be included that are substantially symmetric about the axis of the charge case. Forming a shaped charge with such a charge case allows for gun strips to be formed with increased web material between adjacent shape charges in the gun strips. The increased web material provides for a more structurally sound gun tube, especially when dealing with high density charges. Notches may be provided in the gun tube on the outer radius of the holes formed to receive the shape charges, the notches are to be aligned with the bosses on the outer periphery of the shaped charge case. This also may orient the charge cases so they are pre-aligned for ready connection to an associated detonation cord.

A cartridge assembly for use with a perforating system having a contact terminal that connects to a perforating signal line when inserted into a receptacle end of a perforating gun. A detonator may be included in an end of the cartridge assembly for initiating a detonating cord in the perforating gun. The cartridge assembly is a modular unit that replaces the manual connections made when assembling a string of perforating guns. The cartridge assembly may optionally include a controller switch for controlling current flow through the cartridge assembly.

An ordnance system of the present invention may include or feature any one or more of: a control unit, one or more effectors (detonators, initiators, shaped charges and the like), and a two-, three- or four-wire communication bus between the control unit and the effectors; an addressable system in which all the effectors can be connected to the same communication bus and the control unit can issue coded signals on the bus addressed to a specific effector; inductive coupling between the effectors and the communication bus; and a multi-voltage level communication system in which communication signals are carried at a first voltage and arming signals are provided at a second, higher voltage. Other features may include two-way communication between effectors and the control unit and the de-centralization of firing control so that the control unit does not have exclusive control over whether the effectors function. As a result, the individual effectors possess decision-making ability and, for purposes of this invention, may be referred to as "intelligent" effectors. To participate in the decision-making process, effectors of this invention may be equipped with sensors or other diagnostic circuitry whose condition is checked for satisfactory output before functioning is permitted to occur.

A tool activation system and method includes receiving an authorization code of a user to verify access rights of a user to activate the tool. In one example, the authorization code is receive from a smart card. The environment around the tool, which can be in a wellbore, for example, is checked. In response to the authorization code and the checking of the environment, activation of the tool is enabled.

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.

An initiator for initiating detonation in a detonation cord of a perforating system, where the initiator comprises a modular electronic igniter that quick connects into a portion of high explosive. The high explosive is disposed in a housing having an end of detonation cord crimped therein. The electronic igniter may be shipped to the field and / or stored separate from the high explosive then the two may be assembled just prior to deploying the perforating gun assembly in a wellbore. Various methods of quick connecting the electronic igniter to the high explosive may be used.

The perforation gun is comprised of a tubular carrier, a charge holder, a plurality of sealed charges, and a detonating cord. The tubular carrier has a length and a plurality of openings. The charge holder has a length and is comprised of a plurality of mounting locations which are each capable of receiving one of the sealed charges. The charge holder is capable of being secured within the carrier. The detonating cord is coupled to at least one sealed charge. In the mounted position and when the charge holder is secured within the carrier, the charges are aligned with the openings in the carrier such that, upon detonation, charge blasts emitted from the charges exit though the carrier openings and perforate a well casing and cement. In one aspect of the invention, the carrier openings are spirally arranged and spaced along the length of the carrier. In still another aspect of the invention, the openings are vertically arranged and spaced along the length of the carrier. In still another aspect of the invention, the carrier is closed at the top and bottom. In still another aspect of the invention, the carrier is capable of capturing debris created by a charge blast emitted from the sealed charges.

Embodiments of the present invention relate to systems, methods, and apparatus for reliably communicating a detonation signal and perforating oil and / or gas well casings. Particularly, at least one embodiment includes a pass-through bulkhead connection switch that can reliably withstand high operating temperatures and pressures. Such pass-through bulkhead connection switch can be used in perforating gun assemblies and can eliminate or reduce incidents of failed detonations.

Disclosed herein are boosters that include components sufficient for wireless communications with an associated blasting machine. In selected aspects, there are disclosed wireless electronic boosters that are self-contained and robust. Such boosters are especially suited for underground mining operations, optionally employing automated placement of boosters at a blast site.

A security screen device for protecting persons and property is provided. The security screen device comprises an enclosed screen housing defining a screen receiving area. A screen material made of high strength fibers is receivable within the screen housing in an undeployed condition with the screen material having a first edge and a second edge. The first edge is secured within the screen receiving area and a weighted bar is secured to the second edge of the screen material. An activation mechanism opens one side of the screen housing releasing the screen material from the housing into a deployed condition such that the second edge of the screen material travels in a direction generally away from the enclosed screen housing thereby pulling the screen material from the enclosed screen housing.