Schlumberger Technology Corporation

Other

USA As Represented by Secretary of the Navy

Philip Kneisl

Brenden M Grove

Andrew T Werner

Gary L Rytlewski

Alexander F Zazovsky

James E Brooks

Lawrence A Behrmann

Jorge E Lopez De Cardenas

Ian C Walton

Steven W Henderson

Timothy Al Andrzejak

Alfredo Fayard

Mark C Duhon

James A Gusack

Bennie Gill

Hongfa Huang

Mark D Lowell

Raymond Dickes

An explosive pellet for characterizing a fracture in a subterranean formation is provided. The pellet can include a casing having a detonation material and an explosive material disposed within the casing. The pellet can also include a nonexplosive material moveably disposed within the casing. Movement of the nonexplosive material can generate a predetermined amount of energy in the form of friction-generated heat sufficient to detonate the explosive material.

Explosive pellet

A downhole device having an explosive component includes a high temperature stable explosive having thermal stability greater than 200&#xb0; C., wherein the explosives having a compound of formula (I) or (II): 

Application of high temperature explosive to downhole use

A perforating apparatus that is usable with a well includes a shaped charge. The shaped charge includes a case, an explosive and a liner. The liner is adapted to form a perforation jet to form a perforation tunnel and promote an exothermic reaction inside the tunnel to create a pressure wave to force debris from the tunnel.

Shaped charge

A detonating device includes a high explosive portion comprising high explosive; a low explosive portion comprising low explosive; and a transition portion between the high explosive portion and the low explosive portion, wherein the transition portion comprises a mixture of high explosive and low explosive.

Detonation to igniter booster device

A perforating charge for use in a wellbore includes an explosive and a liner to be collapsed by detonation of the explosive. The liner includes at least a first liner portion and a second liner portion which have different cohesiveness.

Perforating charge for use in a well

A tool for use in a wellbore has an activation assembly, which has a support structure and a reactive layer on the support structure. The reactive layer is formed of a pyrotechnic material. The activation assembly also includes an electrically conductive protective layer covering the reactive layer to protect the reactive layer from electrical discharge. The tool further includes a component to be activated by the activation assembly.

Protective electrically conductive layer covering a reactive layer to protect the reactive layer from electrical discharge

A propellant assembly for fracturing a formation around a well includes a propellant and a detonating cord wrapped around the propellant, the detonating cord to ignite the propellant upon detonation of the detonating cord. Alternatively, the propellant can include a substantially central axial bore, with the propellant having a plurality of axial slots extending radially outwardly from the axial bore toward the outer surface of the propellant. A detonating cord is arranged within the axial bore of the propellant.

Propellant fracturing of wells

A method for perforating a wellbore comprises placing a perforating device in a cased wellbore that passes through a subterranean formation. The perforating device comprises at least one explosive perforating charge that can be detonated in order to perforate the casing and allow the formation fluids to enter the wellbore. A perforating fluid is placed in the wellbore between the perforating device and the casing. The ratio of the critical temperature of the perforating fluid in &#xb0; K and the temperature of the subterranean formation adjacent to the casing in &#xb0; K is between about 1.0-1.3. When the at least one explosive charge in the perforating device is detonated, at least one perforation is formed in the casing, and at least a portion of the perforating fluid is forced into the subterranean formation.

Perforating method

An apparatus for reducing the post-detonation pressure of a perforating gun, the apparatus including a perforating gun carrying at least one explosive charge, wherein when the explosive charge is detonated the explosive charge produces a pressurized detonation gas, and a mechanism for reducing the pressure of the detonation gas proximate the perforating gun. The detonation gas pressure is desirably reduced in a time frame sufficient to create a dynamic underbalance condition to facilitate a surge flow of fluid from a reservoir into a wellbore. The pressure reduction mechanism may include singularly or in combination a heat sink to reduce the temperature of the detonation gas, a reactant to recombine with the reactant gas and reduce the molar density of the detonation gas, and a physical compression mechanism to utilize the waste energy of the detonation gas to create work, simultaneously reducing the temperature of the gas and the molar density of the detonation gas.

Method and apparatus for reducing pressure in a perforating gun

The present invention provides high temperature explosive binders. More specifically, the present invention provides thermally stable polymeric binders for use in pressed explosives and suitable for environments such as the oilfield environment.

Hi-temp explosive binder

The present invention provides an anti-hijacking system. In one embodiment, the anti-hijacking system is used in an airplane to provide forceful contact to disarm, disable, immobilize or otherwise incapacitate a hostile intruder who has entered the cockpit. The anti-hijacking system includes one or more inflation devices, such as deployable air bags.

Anti-hijacking system

The present invention provides an anti-hijacking system. In one embodiment, the anti-hijacking system is used in an airplane cockpit to provide forceful contact to disarm, disable, immobilize or otherwise incapacitate a hostile intruder who has entered the cockpit. The anti-hijacking system includes one or more inflation devices, such as deployable air bags.

Solutions and process are described useful to produce coated HE powder granules in an aqueous slurry agglomeration process. A reaction mixture is made utilizing a lacquer stock solution comprising a binder material dissolved in a substantially aqueous-immiscible organic lacquer solvent, and an aqueous HE powder slurry solution comprising a non-aqueous soluble HE powder and an at least partially aqueous-miscible organic co-solvent. The co-solvent acts as an entrainer and improves the immiscible of the lacquer solvent in the water phase of the aqueous HE powder slurry solution, resulting in formation of HE powder agglomerates that remain stable as the solvents are removed from the reaction mixture during the agglomeration process. Further, the process is adjustable to substantially eliminate organic solvent contamination of the waste water stream.

Slurry coating method for agglomeration of molding powders requiring immiscible lacquer solvents

The present invention provides a method and apparatus for providing zero-defect pressed articles with minimal, remote operator intervention. The apparatus includes a programmable logic controller, controlling a powder feeder portion having a dump bucket which is weighed by an electronic scale. Desired weights of powder in the dump bucket are dumped to a first location and conveyed to the press. Non-desired weights of powder in the dump bucket are dumped to a second location and may be recycled. The invention provides for precise weighing of powder and avoids waste of powder in the event of improper powder dispensing and provides for complete automatic logging of production and testing data, and rejection of defective articles, avoiding the need to manually test each produced article. This method and apparatus are particularly useful in the pressing of energetic materials into pellets or casings, where manual operations are restricted for safety reasons.

Growing community of inventors

Pearland, TX, United States of America

Philip Kneisl