公开(公告)号：US10261214B2

公开(公告)日：2019-04-16

申请号：US15143657

申请日：2016-05-02

Applicant: Schlumberger Technology Corporation

Inventor： Christian Stoller

IPC: G01V5/10 ,  G01V3/08 ,  G01V3/38

Abstract: A method for separating and quantifying gamma ray induced and neutron induced responses in a radiation detector includes detecting radiation in a radiation field comprising neutrons and gamma rays. The detected events are converted into a detector pulse amplitude spectrum. The pulse amplitude spectrum is decomposed into contributions from detected gamma rays and detected neutrons using gamma ray standard spectra and neutron standard spectra and a spectral fitting procedure which results in a best fit between a weighted sum of the contributions and the detector pulse amplitude spectrum. The fitting procedure includes determining fitting parameters for each of the standard spectra wherein at least one of the fitting parameters is different for the gamma ray standard spectra and the neutron standard spectra. In one embodiment, the fitting parameter is spectral gain.

公开(公告)号：US20180261349A1

公开(公告)日：2018-09-13

申请号：US15952277

申请日：2018-04-13

Applicant: Schlumberger Technology Corporation

Inventor： Luke T. Perkins ,  Christian Stoller ,  Peter Wraight

IPC: G21G4/02 ,  H05H3/06

CPC classification number: G21G4/02 ,  G01V5/10 ,  H01J35/00 ,  H01J35/04 ,  H01J35/14 ,  H01J2235/023 ,  H05G1/02 ,  H05G1/10 ,  H05H3/06

Abstract: 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.

公开(公告)号：US20180210110A1

公开(公告)日：2018-07-26

申请号：US15894023

申请日：2018-02-12

Applicant: Schlumberger Technology Corporation

Inventor： Kenneth E. Stephenson ,  David Rose ,  Avtandil Tkabladze ,  Christian Stoller ,  John J. Simonetti

IPC: G01V5/10

CPC classification number: G01V5/104 ,  G01V5/101

Abstract: Systems, methods, and devices for inelastic gamma-ray logging are provided. In one embodiment, such a method includes emitting neutrons into a subterranean formation from a downhole tool to produce inelastic gamma-rays, detecting a portion of the inelastic gamma-rays that scatter back to the downhole tool to obtain an inelastic gamma-ray signal, and determining a property of the subterranean formation based at least in part on the inelastic gamma-ray signal. The inelastic gamma-ray signal may be substantially free of epithermal and thermal neutron capture background.

公开(公告)号：US20180188409A1

公开(公告)日：2018-07-05

申请号：US15393805

申请日：2016-12-29

Applicant: Schlumberger Technology Corporation

Inventor： Mauro Manclossi ,  Laurent Laval ,  Christian Stoller

IPC: G01V5/08

Abstract: A downhole tool includes a radiation generator configured to output radiation using electrical power received from a power supply. A first portion of the radiation is emitted into a surrounding sub-surface formation. The downhole tool also includes a radiation detector coupled proximate the radiation generator. The radiation detector includes a micromesh gaseous detector, and the radiation detector is configured to output a measurement signal based at least in part on interaction between a second portion of the radiation output by the radiation generator and the radiation detector. Additionally, the downhole tool includes a control system communicatively coupled to the radiation generator and the radiation detector. The control system is configured to determine measured characteristics of the radiation output from the radiation generator based at least in part on the measurement signal and to control operation of the radiation generator based at least in part on the measured characteristics.

公开(公告)号：US20180061610A1

公开(公告)日：2018-03-01

申请号：US15791818

申请日：2017-10-24

Applicant: Schlumberger Technology Corporation

Inventor： Matthieu Simon ,  Anthony Durkowski ,  Christian Stoller

IPC: H01J35/02 ,  E21B47/08 ,  G01V3/30 ,  G01V3/12 ,  G01N23/20 ,  E21B47/01

CPC classification number: H01J35/025 ,  E21B47/011 ,  E21B47/082 ,  E21B47/1015 ,  E21B49/00 ,  G01N9/24 ,  G01N23/20008 ,  G01N2035/00306 ,  G01N2201/0227 ,  G01N2223/05 ,  G01N2223/204 ,  G01N2223/30 ,  G01V3/12 ,  G01V3/30 ,  G01V5/0008 ,  G01V5/04 ,  G01V5/12 ,  H01J3/023 ,  H01J37/061 ,  H01J43/04 ,  H02M7/103 ,  H05G1/10 ,  H05H3/06 ,  H05H5/045 ,  Y10T29/41 ,  Y10T29/49117

Abstract: A well-logging tool may include a sonde housing, and a radiation generator carried by the sonde housing. The radiation generator may include a generator housing, a target carried by the generator housing, a charged particle source carried by the generator housing to direct charged particles at the target, and at least one voltage source coupled to the charged particle source. The at least one voltage source may include a voltage ladder comprising a plurality of voltage multiplication stages coupled in a bi-polar configuration, and at least one loading coil coupled at at least one intermediate position along the voltage ladder. The well-logging tool may further include at least one radiation detector carried by the sonde housing.

公开(公告)号：US20180003854A1

公开(公告)日：2018-01-04

申请号：US15196255

申请日：2016-06-29

Applicant: Schlumberger Technology Corporation

Inventor： Matthieu Simon ,  Christian Stoller

IPC: G01V5/12 ,  E21B49/08 ,  E21B49/00

CPC classification number: G01V5/125 ,  E21B49/00 ,  E21B49/08 ,  G01V5/08

Abstract: The current disclosure is related to a downhole tool that comprises an electronic photon generator and at least one detector. The electronic photon generator comprises a cathode configured to emit electrons, a first target configured to generate photons when struck by the electrons, a second target configured to generate photons when struck by the electrons, and a beam steering device that directs the electrons to a first or second target. The at least one detector is configured to detect at least some of the photons emitted by the first target and at least some of the photons emitted by the second target.

公开(公告)号：US09835736B2

公开(公告)日：2017-12-05

申请号：US14643988

申请日：2015-03-10

Applicant: Schlumberger Technology Corporation

Inventor： Christian Stoller ,  Robert A. Adolph ,  Bradley A. Roscoe

IPC: G01T1/202 ,  G01T1/20 ,  G01V5/00 ,  G01V5/10

CPC classification number: G01T1/202 ,  G01T1/20 ,  G01V5/00 ,  G01V5/10

Abstract: Systems, methods, and devices for thermally protecting a scintillator crystal of a scintillation detector are provided. In one example, a thermally-protected scintillator may include a scintillator crystal and a thermal protection element, which may partially surround the scintillator crystal. The thermal protection element may be configured to prevent the scintillator crystal from experiencing a rate of change in temperature sufficient to cause cracking or non-uniform light output, or a combination thereof.

公开(公告)号：US20170285219A1

公开(公告)日：2017-10-05

申请号：US15086238

申请日：2016-03-31

Applicant: Schlumberger Technology Corporation

Inventor： Dominic Joseph Brady ,  Ali Bin Al-Sheikh ,  Christian Stoller

IPC: G01V5/10 ,  E21B34/06 ,  E21B47/09 ,  E21B33/12

CPC classification number: E21B47/09 ,  G01V5/101

Abstract: Methods may include detecting the presence of a component in a wellbore including irradiating an interval of a wellbore containing one or more components of a wellbore tool with a neutron source, wherein the one or more components of the wellbore tool comprise one or more tracer materials; measuring the radiation emitted from the one or more components of a wellbore tool; determining one or more of presence, location, and intensity of the radiation emitted from the one or more components of the wellbore tool. Devices may include a first element comprising one or more tracer materials, wherein the one or more tracer materials emit gamma radiation upon irradiation with a neutron source; wherein the tool is configured to be emplaced in a subterranean formation.

公开(公告)号：US09715022B2

公开(公告)日：2017-07-25

申请号：US13895130

申请日：2013-05-15

Applicant: Schlumberger Technology Corporation

Inventor： Wolfgang Ziegler ,  Christian Stoller ,  Kenneth E. Stephenson

IPC: G01V5/00 ,  G01T1/40 ,  G01T1/20

CPC classification number: G01T1/40 ,  G01T1/20 ,  G01T1/2018

Abstract: A radiation detector package includes a support apparatus at least part of which is constructed from a naturally occurring radioactive material. A scintillator is associated with the support apparatus. The support may include a detector housing carrying a photodetector and the scintillator, and the detector housing may be constructed from the naturally occurring radioactive material.

公开(公告)号：US20160306070A1

公开(公告)日：2016-10-20

申请号：US15193849

申请日：2016-06-27

Applicant: Schlumberger Technology Corporation

Inventor： Matthieu Simon ,  Peter Wraight ,  Christian Stoller ,  Kenneth E. Stephenson ,  Andrew Bazarko

IPC: G01V5/12 ,  E21B17/16 ,  E21B49/00

CPC classification number: G01V5/125 ,  E21B17/16 ,  E21B47/00 ,  E21B49/00 ,  G01N23/083 ,  G01V5/04 ,  G01V5/12

Abstract: 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.

Abstract translation: 提供了包括诸如电子X射线发生器的电子辐射发生器的同时钻孔工具及其使用方法。 这种钻井测井工具的一个例子可以包括圆周钻铤，径向设置在钻铤内部的底盘，以及设置在底盘内的电子X射线发生器和X射线探测器。 电子X射线发生器可以将X射线从测井钻井工具中排出到地层中。 X射线检测器可以检测在地下地层散射之后返回到钻井测井工具的X射线，其可以用于确定地下岩层的密度和/或岩性。