1
James S Almaguer, Thomas H Zimmerman, Jorge E Lopez de Cardenas: Orienting downhole tools. Schlumberger Technology Corporation, Trop Pruner & Hu P C, January 16, 2001: US06173773 (55 worldwide citation)

A method and apparatus of orienting a tool in a wellbore includes running an orientation string into the wellbore, the orienting string including a positioning device, a measurement device (e.g., a gyroscope), and the tool. The orientation string is positioned in a predetermined interval in the well ...


2
Jorge E Lopez de Cardenas: Pivot gun having charges which slidingly engage a stationary detonating cord and apparatus for deploying the charges. Schlumberger Technology Corporation, Henry N Garrana, John H Bouchard, March 17, 1992: US05095801 (13 worldwide citation)

A pivot gun through-tubing perforating apparatus, which is adapted to be lowered through a tubing in a borehole, includes a perforating gun section and a deployment head section. The perforating gun section includes a plurality of charges which rotate or pivot about an axis during deployment, and a ...


3
Daniel C Markel, Jorge E Lopez de Cardenas, Victor M Vu: Phased perforating guns. Sclumberger Technology Corporation, Gordon G Waggett, John J Ryberg, John Bouchard, October 6, 1998: US05816343 (11 worldwide citation)

A perforating gun having a base structure made of a deformable material. The base structure includes support rings integrally attached to one another by connector portions. The capsule charges are mounted in corresponding support rings, and each support ring is adjustable by selective deformation of ...


4
Belgin Baser, Curtis L Boney, Eric Clum, Jorge E Lopez de Cardenas: Multilayered ball sealer and method of use thereof. Schlumberger Technology Corporation, Rachel E Greene, Tim Curington, May 6, 2014: US08714250 (6 worldwide citation)

A multilayered ball sealer having a deformable layer. The multilayered ball sealer has an outer or intermediate layer that is deformable under pressure. In the former, the deformable layer may be water-soluble or hydrolysable. In the latter, the outer layer is a sheath that contains the deformable l ...


5
Jorge E Lopez de Cardenas: Perforating gun assembly including a carrier having a first section adapted to separate from a second section when a charge on the second section detonates. Schlumberger Technology Corporation, Henry N Garrana, John H Bouchard, November 12, 1991: US05063822 (6 worldwide citation)

A novel dropoff apparatus adapted for use in a perforating gun or other such apparatus adapted to be disposed in a borehole includes an embrittled carrier section connected to a further section of the perforating gun or other such apparatus. The embrittled carrier section includes an embrittled carr ...


6
Jorge E Lopez de Cardenas: Drop off method for perforating gun capsule charge carriers. Schlumberger Technology Corporation, Henry N Garrana, John H Bouchard, April 28, 1992: US05107929 (5 worldwide citation)

A novel dropoff apparatus adapted for use in a perforating gun or other such apparatus adapted to be disposed in a borehole includes an embrittled carrier section connected to a further section of the perforating gun or other such apparatus. The embrittled carrier section includes an embrittled carr ...


7
Lawrence A Behrmann, Jorge E Lopez de Cardenas, Robert A Parrott: Optimizing charge phasing of a perforating gun. Schlumberger Technology Corporation, Trop Pruner & Hu P C, June 4, 2002: US06397947 (5 worldwide citation)

A method includes arranging shaped charges in a perforating gun to produce perforation holes in a helical pattern that is defined in part by a phase angle; and choosing four adjacent perforation holes to be created that are adjacent nearest neighbors. The distances are determined between three of th ...


8
Sascha Trummer, Eric Clum, Curtis L Boney, Jorge E Lopez de Cardenas, Belgin Baser, Jason Swaren: Method of placing ball sealers for fluid diversion. Schlumberger Technology Corporation, October 22, 2013: US08561696 (4 worldwide citation)

A method for placing ball sealers within a well formed within a subterranean formation for sealing holes in a casing of the well is carried out by performing at least one of two operations. The first operation involves providing a tag with at least one ball sealer or a carrier fluid containing the a ...


9
Jorge E Lopez de Cardenas, Adinathan Venkitaraman: Real time optimization of well production without creating undue risk of formation instability. Schlumberger Technology Corporation, Van Someren P C, Bryan P Galloway, March 18, 2008: US07343970 (1 worldwide citation)

A system and method is provided for producing fluid from a subterranean formation. A sensor system is used to monitor bottom hole flowing pressure and formation pressure. The relationship of these pressures is utilized in conjunction with a stability envelope of the formation in optimizing fluid pro ...


10
Timothy A Andrzejak, Jorge E Lopez de Cardenas, Robinson Egydio Lopes: Collapse initiated explosive pellet. SCHLUMBERGER TECHNOLOGY CORPORATION, February 5, 2019: US10196894

A technique facilitates analysis of hydraulic fractures. A plurality of explosive pellets is constructed for delivery into fracture or fractures of a subterranean formation. Each explosive pellet comprises an explosive material combined with an initiating member working in cooperation with a frictio ...