Schlumberger Technology Corporation

Other

Services Petroliers Schlumberger

Schlumberger Holdings Limited

Prad Research and Development Limited

Peter D Wraight

Christian Stoller

Joel Lee Groves

Luke T Perkins

Matthieu Simon

Arthur J Becker

Etienne Vallee

Kenneth Edward Stephenson

James A Grau

Bradley Albert Roscoe

Jani Petteri Reijonen

Roger Griffiths

Wolfgang P Ziegler

Jean-Pierre Poyet

Benjamin Levitt

Anthony Durkowski

Arthur D Liberman

Rod W Shampine

Robert A Adolph

Jean-Michel Hache

John E Edwards

Harold Pfutzner

Markus Berheide

John J Simonetti

Donald C McKeon

Nicolas Renoux

Irina Molodetsky

Erik Rhein-Knudsen

Nihal I Wijeyesekera

Mike Evans

Urmi DasGupta

Edouard Marienbach

Ken Stephenson

Andrew Bazarko

Oliver Clinton Mullins

Jacques J Orban

Yi-Qiao Song

Michael Lynn Evans

Go Fujisawa

Felix K Chen

Darwin V Ellis

Vincent Chatelet

Jeffrey S Schweitzer

Olivier G Philip

Hubert D Scott

Lennox Reid

James C Mayes

Cornelis Huiszoon

James Leslie Thornton

Libai Xu

Bruno Jorion

Frederic Gicquel

Russel C Hertzog

Gilles Mathieu

Gary W Corris

William A Loomis

Kevin Lee Hiles

Brad Roscoe

Robert Little

Russell C Hertzog

Dennis J Pittman

Axel Quignard

Roland Banas

Kent Lang

Leo Chirovsky

Sunil N Gulrajani

Fabien Guizelin

Fabien Nibodeau

Edward Clayton

Frederic Gicquiel

Avto Tkabladze

Christian Galiano

Verna L Lomax

Xavier Herve

Disclosed is a radiation logging tool, comprising a tool housing; a compact generator that produces radiation; a power supply coupled to the compact generator; and control circuitry. Embodiments of the compact generator comprise a generator vacuum tube comprising a source generating charged particles, and a target onto which the charged particles are directed; and a high voltage supply comprising a high voltage multiplier ladder located laterally adjacent to the generator vacuum tube. The high voltage supply applies a high voltage between the source and the target to accelerate the charged particles to a predetermined energy level. The compact generator also includes an electrical coupling between an output of the high voltage supply and the target of the generator vacuum tube to accommodate the collocated positions of the generator vacuum tube and the high voltage power supply.

High voltage supply for compact radiation generator

A scintillator type radiation detector package is provided including a scintillation crystal directly coupled to the window of a photomultiplier. A scintillator package is also provided having a longer life at wellbore temperature with minimal deterioration of a hygroscopic scintillation crystal(s). Direct optical coupling of the scintillator to the photomultiplier reduces the amount of light lost at coupling interfaces and improved detection resolution over the conventional structures having separate packages for crystal and photomultiplier.

Integrated coupling of scintillation crystal with photomultiplier in a detector apparatus

Systems, methods, and apparatuses to identify functional issues of a neutron radiation generator are described. In certain aspects, a method includes receiving an operation extractor signal from an extractor electrode of a radiation generator, determining a calculated extractor signal of the radiation generator, and comparing the operation extractor signal to the calculated extractor signal. The calculated extractor signal may be determined from an operation acceleration signal from an acceleration member of the radiation generator, an operation electron beam signal from electrons backstreaming in the radiation generator, an ion signal of an ion beam of the radiation generator, or a combination thereof.

Method and apparatus to identify functional issues of a neutron radiation generator

Various embodiments for shortening the overall length of a pulsed neutron generator having a high voltage power supply are disclosed, including but not limited to, providing the plurality of stages of a high voltage power supply wrapped circumferentially or helically about a radiation generator tube. Various techniques for reducing voltage differentials and mitigating the risk of arcing in these embodiments are also disclosed.

Compact radiation generator

An installation for intervention in a well, comprises a lower assembly comprising a neutron generator and a power source electrically connected to the neutron generator; a surface assembly comprising one or more safety devices, each safety device being either in a safe state or an unsafe state; and a communication module that connects the lower and surface assemblies. The surface assembly also comprises a surface transmitting device for transmitting data to the downhole assembly via the communication module including a first transmitter for transmitting an activating command, where the first transmitter transmits the activating command only if each of the safety device is in a safe state, and a second transmitter for transmitting a stopping command, where the second transmitter transmits the stopping command if one of the safety device is in an unsafe state.

Installation for intervention in a well comprising a neutron generator, and method associated therewith

Systems, methods, and apparatuses to determine an operation gas pressure in a neutron radiation generator are described. In certain aspects, a method to determine the operation gas pressure includes receiving an operation radiation signal from a radiation generated by electrons backstreaming in a radiation generator, and determining from the operation radiation signal an operation gas pressure in a chamber of the radiation generator. An operation radiation signal may be received from a radiation detector associated with a neutron radiation generator. A radiation detector may detect radiation produced by particles (e.g., electrons) striking a portion (e.g., a cathode) of the neutron radiation generator.

Method and apparatus to determine pressure in a neutron radiation generator

Logging-while-drilling tools incorporating an electronic radiation generator, such as an electronic X-ray generator, and a method for using the same are provided. One example of such a logging-while-drilling tool may include a circumferential drill collar, a chassis disposed radially interior to the drill collar, and an electronic X-ray generator and an X-ray detector disposed within the chassis. The electronic X-ray generator may emit X-rays out of the logging-while-drilling tool into a subterranean formation. The X-ray detector may detect X-rays that return to the logging-while-drilling tool after scattering in the subterranean formation, which may be used to determine a density and/or a lithology of the subterranean formation.

Logging-while-drilling tool incorporating electronic radiation generator and method for using same

Systems and methods for neutron porosity well logging with high precision and reduced lithology effects are provided. In accordance with an embodiment, a downhole neutron porosity tool may include a neutron source, a neutron monitor, a neutron detector, and data processing circuitry. The neutron source may emit neutrons into a subterranean formation while the neutron monitor detects a count of neutrons proportional to the neutrons emitted. The neutron detector may detect a count of neutrons that scatters off the subterranean formation. The data processing circuitry may determine an environmentally corrected porosity of the subterranean formation based at least in part on the count rate of neutrons scattered off the subterranean formation normalized to the count rate of neutrons proportional to the neutrons emitted by the neutron source.

Neutron porosity downhole tool with improved precision and reduced lithology effects

The present invention provides systems and methods capable of improving the efficiency and effectiveness of leaching operations. In one embodiment, the present invention may utilize a coiled tubing directional drilling system capable of treating interior portions of the heap/formation. In one embodiment, the present invention may utilize a system and method capable of capturing real time temperature and resistivity data pertaining to pregnant solution characteristics in the heap/formation. In one embodiment, the present invention may utilize one or more wire line deployed X-Ray Fluorescence (XRF) spectrometers capable of quantitatively measuring concentrations of desired metals in the heap/formation during leaching operations. In one embodiment, the present invention utilizes multiple passes of elemental capture spectroscopy logs acquired at regular time intervals to monitor metal concentrations during leaching operations. In one embodiment, the present invention provides one or more subsurface barriers capable of optimizing leaching operations.

Mining systems and methods

An ion source for use in a radiation generator includes an active cathode configured to emit electrons on a trajectory away from the active cathode, at least some of the electrons as they travel interacting with an ionizable gas to produce ions. In addition, there is at least one extractor downstream of the active cathode having a potential such that the ions are attracted toward the at least one extractor.

Ion source having negatively biased extractor

Systems, methods, and devices with improved electrode configuration for downhole nuclear radiation generators are provided. For example, one embodiment of a nuclear radiation generator capable of downhole operation may include a charged particle source, a target material, and an acceleration column between the charged particle source and the target material. The acceleration column may include several electrodes shaped such that substantially no electrode material from the electrodes is sputtered onto an insulator surface of the acceleration column during normal downhole operation.

Electrode configuration for downhole nuclear radiation generator

Growing community of inventors

Missouri City, TX, United States of America

Peter D Wraight