公开(公告)号：US20140034822A1

公开(公告)日：2014-02-06

申请号：US13728918

申请日：2012-12-27

Applicant: Schlumberger Technology Corporation

Inventor： Michael L. Evans ,  Avtandil Tkabladze ,  Christian Stoller

IPC: G01V5/08

CPC classification number: G01V5/08 ,  G01V5/101

Abstract: A well-logging device may include a housing to be positioned within a borehole of a subterranean formation and at least one radiation source carried by the housing to direct radiation into the subterranean formation. The well-logging device may also include noble gas-based radiation detectors carried by the housing to detect radiation from the subterranean formation. At least one of the noble detectors is at a first axial spacing from the at least one radiation source, and at least one other of the noble gas-based radiation detectors is at a second axial spacing from the at least one radiation source different from the first axial spacing. A controller may determine at least one property of the subterranean formation based upon the detected radiation from the noble gas-based radiation detectors.

Abstract translation: 测井装置可以包括要被定位在地层的钻孔内的壳体和由壳体承载的至少一个辐射源以将辐射引导到地下地层中。 测井装置还可以包括由壳体携带的基于惰性气体的辐射探测器来检测来自地层的辐射。 至少一个贵族检测器处于与至少一个辐射源的第一轴向间隔，并且至少另一个基于惰性气体的辐射探测器处于与不同于该辐射源的至少一个辐射源的第二轴向间隔 第一轴向间距。 控制器可以基于来自稀有气体的辐射检测器的检测到的辐射来确定地下地层的至少一个性质。

公开(公告)号：US11887746B2

公开(公告)日：2024-01-30

申请号：US17532507

申请日：2021-11-22

Applicant: Schlumberger Technology Corporation

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

IPC: G21G4/02 ,  H05H3/06 ,  G01V5/10 ,  H01J35/04 ,  H01J35/14 ,  H01J35/00 ,  H05G1/10 ,  H05G1/02 ,  H05G1/00

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

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：US20210389495A1

公开(公告)日：2021-12-16

申请号：US17460825

申请日：2021-08-30

Applicant: Schlumberger Technology Corporation

Inventor： Pascal Millot ,  Adil Busaidy ,  Jeffrey Miles ,  Tong Zhou ,  Christian Stoller ,  David Rose ,  Richard Radtke

IPC: G01V5/10 ,  E21B47/12

Abstract: A presence of cement may be identified based on a downhole tool that may emit neutrons into a wellbore having at least one cement casing. The neutrons may interact with the particular material via inelastic scattering, inelastic neutron reactions, capture of neutrons and/or neutron activation through one of these reactions and cause a material to emit an energy spectrum of gamma rays, and wherein the downhole tool is configured to detect an energy spectrum of the gamma rays that is specific to at least one of a plurality of elements and associated a region within the wellbore. An amount of elements, such as calcium and silicon, may be determined from the gamma ray spectra that may indicate a present of cement within the wellbore.

公开(公告)号：US20210096275A1

公开(公告)日：2021-04-01

申请号：US17120788

申请日：2020-12-14

Applicant: Schlumberger Technology Corporation

Inventor： Matthieu Simon ,  Christian Stoller

IPC: G01V5/12 ,  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：US10120099B2

公开(公告)日：2018-11-06

申请号：US15326920

申请日：2015-07-21

Applicant: Schlumberger Technology Corporation

Inventor： Frederic Gicquel ,  Olivier G. Philip ,  Christian Stoller ,  Zilu Zhou

IPC: G01V5/00 ,  G01V5/10 ,  G01T1/24

Abstract: Devices and methods for a rugged semiconductor radiation detector are provided. The semiconductor detector may include a hermetically sealed housing and a semiconductor disposed within the housing that has a first surface and a second surface opposite one another. A first metallization layer may at least partially cover the first surface of the semiconductor and a second metallization layer may at least partially cover the second surface of the semiconductor. The first metallization layer or the second metallization layer, or both, do not extend completely to an edge of the semiconductor, thereby providing a nonconductive buffer zone. This reduces electrical field stresses that occur when a voltage potential is applied between the first metallization layer and the second metallization layer and reduces a likelihood of electrical failure (e.g., due to arcing).

公开(公告)号：US10114143B2

公开(公告)日：2018-10-30

申请号：US15375569

申请日：2016-12-12

Applicant: Schlumberger Technology Corporation

Inventor： Mauro Manclossi ,  Laurent Laval ,  Christian Stoller ,  Francoise Allioli

IPC: G01V5/06 ,  G01V5/10 ,  E21B47/00 ,  E21B47/10

Abstract: This disclosure is related to a downhole tool to be lowered into a wellbore, having a longitudinal axis and an outer surface, the tool including: a particle detection assembly having at least one particle detector for detecting at least a predetermined type of particles, wherein the particle detectors of the assembly are each wrapped around at least one detecting portion forming an angular portion of the tool azimuthal plane perpendicular to the longitudinal axis of the tool so that the detection assembly substantially forms a ring, at least a window transparent to the particle type and extending between the outer surface and the particle detection assembly.

公开(公告)号：US20180188412A1

公开(公告)日：2018-07-05

申请号：US15393793

申请日：2016-12-29

Applicant: Schlumberger Technology Corporation

Inventor： Sicco Beekman ,  Christian Stoller

IPC: G01V5/12

CPC classification number: G01V5/12

Abstract: A system for a downhole tool includes an X-ray generator that outputs X-ray radiation into a surrounding sub-surface formation using electrical power received from a power supply and a detector device adjacent the X-ray generator. The detector device includes a first detector with a first radiation sensitivity that outputs a first measurement signal based on interaction between a first portion of the X-ray radiation and the first detector. The detector device also includes a second detector with a second radiation sensitivity adjacent the first detector, where the second detector outputs a second measurement signal based on interaction between a second portion of the X-ray radiation and the second detector. Further, the detector device includes a control system communicatively coupled to the X-ray generator and the detector device, where the control system determines characteristics of the X-ray radiation output from the X-ray generator based at least in part on a radiation model that describes expected relationship between the characteristics of the X-ray radiation and doses indicated by the first measurement signal and the second measurement signal.

公开(公告)号：US09798037B2

公开(公告)日：2017-10-24

申请号：US14424396

申请日：2013-09-05

Applicant: Schlumberger Technology Corporation

Inventor： Tong Zhou ,  Christian Stoller

IPC: G01V5/10

CPC classification number: G01V5/108 ,  G01V5/101 ,  G01V5/102 ,  G01V5/105

Abstract: A method for determining a formation thermal neutron decay rate from measurements of radiation resulting from at least one burst of high energy neutrons into formations surrounding a wellbore includes determining a first apparent neutron decay rate in a time window beginning at a first selected time after an end of the at least one burst, a second apparent decay rate from a time window beginning at a second selected time after the burst and a third apparent decay rate from a third selected time after the burst. The second time is later than the first time. A thermal neutron capture cross section of fluid in the wellbore is determined. A decay rate correction factor is determined based on the first and second apparent decay rates and a parameter indicative of the wellbore capture cross-section. The correction factor is applied to the third apparent decay rate to determine the formation thermal neutron decay rate.

公开(公告)号：US20170176632A1

公开(公告)日：2017-06-22

申请号：US15375569

申请日：2016-12-12

Applicant: Schlumberger Technology Corporation

Inventor： Mauro Manclossi ,  Laurent Laval ,  Christian Stoller

IPC: G01V5/06

CPC classification number: G01V5/06 ,  E21B47/00 ,  E21B47/10 ,  G01V5/10

Abstract: This disclosure is related to a downhole tool to be lowered into a wellbore, having a longitudinal axis and an outer surface, the tool including: a particle detection assembly having at least one particle detector for detecting at least a predetermined type of particles, wherein the particle detectors of the assembly are each wrapped around at least one detecting portion forming an angular portion of the tool azimuthal plane perpendicular to the longitudinal axis of the tool so that the detection assembly substantially forms a ring, at least a window transparent to the particle type and extending between the outer surface and the particle detection assembly.

公开(公告)号：US20170139074A1

公开(公告)日：2017-05-18

申请号：US15346242

申请日：2016-11-08

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Christian Stoller ,  Matthieu Simon ,  David Alan Rose ,  Libo Yang ,  Onur Ozen ,  Sicco Beekman

IPC: G01V5/08 ,  E21B49/00

CPC classification number: G01V5/08 ,  E21B47/1015 ,  E21B49/00 ,  G01V5/04

Abstract: The present disclosure describes a downhole tool including an electrically operated radiation generator that selectively output radiation to a surrounding environment based at least in part on supply of electrical power; and a control system that determines likelihood of exposing living beings in the surrounding environment to output radiation by determining whether one or more check conditions is met; determine that each of the one or more check conditions is met before instructing the electrically operated radiation generator to output radiation; and instruct the electrically operated radiation generator to cease output of radiation when at least one of the one or more check conditions is no longer met.