1
James E Brooks, Wenbo Yang, Brenden M Grove, Ian C Walton, Manish Kothari, Lawrence A Behrmann, Alfredo Fayard, Daniel C Markel, Wallace E Voreck: Components and methods for use with explosives. Schlumberger Technology Corporation, Jeffrey E Griffin, Brigitte L Jeffery, Trop Pruner & Hu PC, April 29, 2003: US06554081 (36 worldwide citation)

An apparatus and method is provided to reduce interference resulting from activation of explosive devices. One type of interference is charge-to-charge interference, and another type of interference is pre-shock interference between a detonating cord and an explosive, such as a shaped charge. To red ...


2
Wenbo Yang, Alfredo Fayard, Robert A Parrott, Klaus B Huber, Jeffrey P Meisenhelder, A Glen Edwards, Steven W Henderson, Joseph B Edone, Wanchai Ratanasirigulchai, Manuel Gonzalez: Method and apparatus for orienting perforating devices and confirming their orientation. Schlumberger Technology Corporation, Van Someren PC, Bryan P Galloway, Jaime A Castano, February 21, 2006: US07000699 (35 worldwide citation)

The present invention provides an apparatus and method of orienting perforating gun strings. One embodiment of the present invention provides an orienting weight provided in a portion of the perforating device, such as the shaped charge, the loading tube or the gun housing. Additional weight may be ...


3
Wenbo Yang, Brenden M Grove, Lawrence A Behrmann, Alfredo Fayard, Daniel C Markel: Encapsulant providing structural support for explosives. Schlumberger Technology, Jeffrey E Griffin, Brigitte Jeffery, Trop Pruner & Hu PC, February 18, 2003: US06520258 (30 worldwide citation)

An apparatus and method is provided to provide structural support for explosives (e.g., shaped charges) in a tool (e.g., a perforating gun). An encapsulant surrounds at least portions of the explosives to provide structural support for the explosives. The encapsulant contains a porous material, such ...


4
James E Brooks, Philip Kneisl, Alexander F Zazovsky, Mark C Duhon, Alfredo Fayard: Propellant fracturing of wells. Schlumberger Technology Corporation, Trop Pruner & Hu P C, Kevin B McGoff, Bryan P Galloway, October 7, 2008: US07431075 (15 worldwide citation)

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, ...


5
Robert A Parrott, Janet S Denney, Jack F Lands, Alfredo Fayard: Shaped recesses in explosive carrier housings that provide for improved explosive performance in a well. Schlumberger Technology Corporation, Jeffrey E Griffin, Brigitte Jeffery, Trop Pruner & Hu P C, October 8, 2002: US06460463 (12 worldwide citation)

A carrier for containing explosives (e.g., shaped charges) includes a housing having a plurality of recesses, each recess having a periphery and a side surface extending around the periphery. The side surface is shaped to a geometry to reduce or control reflection of compression waves generated in r ...


6
Robert A Parrott, Janet S Denney, Jack F Lands, Alfredo Fayard: Shaped recesses in explosive carrier housings that provide for improved explosive performance. Schlumberger Technology Corporation, Jeffrey E Griffin, Brigitte L Jeffery, John J Ryberg, February 25, 2003: US06523474 (10 worldwide citation)

A carrier for containing explosives (e.g., shaped charges) includes a housing having a plurality of recesses, each recess having a periphery and a side surface extending around the periphery. The side surface is shaped to a geometry to reduce or control reflection of compression waves generated in r ...


7
Manish Kothari, Wenbo Yang, Alfredo Fayard, Anthony F Veneruso, Larry A Behrmann, Jack F Lands, Claude D Jones: Method and apparatus of protecting explosives. Schlumberger Technology Corporation, Trop Prunet & Hu P C, May 14, 2002: US06386296 (7 worldwide citation)

A method and apparatus to protect explosive components used in various tools, such as tools for use in wellbores, includes a component with an adsorptive material. Example tools include perforating gun strings that include shaped charges, detonating cords, and booster explosives. Other tools may inc ...


8
William B Underhill, Scott W Leaney, David Gerez, Alfredo Fayard: Technique and system for performing a cross well survey. Schlumberger Technology Corporation, Myron K Stout, Rachel E Greene, David Cate, January 31, 2012: US08107317 (5 worldwide citation)

A technique includes providing a source in a first well and a seismic receiver in a second well to detect a seismic event that is caused by the source. The technique includes referencing clocks in the source and receiver to a common reference time frame and determining a time in the reference time f ...


9
Haoming Li, Zheng Rong Xu, Chantal Smitheman, Cesar Gama, Alfredo Fayard: Wireless perforating gun. Schlumberger Technology Corporation, Trop Pruner & Hu P C, Kevin B McGoff, Rodney V Warfford, July 27, 2010: US07762172 (5 worldwide citation)

A loading tube for installation in the body of a perforating gun is disclosed. The loading tube holds a plurality of shaped charges whose detonation is electrically initiated, and the loading tube, when installed in the body, comprises at least a portion of the electrical circuit used to initiate de ...


10
Alfredo Fayard, Haoming Li, Robert A Parrott: Perforating gun. Schlumberger Technology Corporation, Jeffery E Griffin, Briqitte L Jeffery, Trop Pruner & Hu P C, February 25, 2003: US06523449 (5 worldwide citation)

A technique includes arranging perforating charges of a perforating gun into groups of adjacent perforating charges. Each perforating charge of each group is aligned in a direction associated with the group. The groups are oriented to form a phasing for the perforating gun.