公开(公告)号：US20210189838A1

公开(公告)日：2021-06-24

申请号：US16723222

申请日：2019-12-20

Applicant: Schlumberger Technology Corporation

Inventor： Jani Reijonen ,  Giovana Stefan ,  Austin Jones ,  Matthieu Simon ,  Anthony Durkowski ,  Marc-Andre de Looz ,  Justin Mlcak

IPC: E21B41/00 ,  H05H3/06

Abstract: A downhole tool may include a high-voltage power supply disposed within a housing to transform input power to the downhole tool from a first voltage to a second voltage greater than the first voltage. The high-voltage power supply may include an array of capacitors, which may include multiple rows of capacitors. The rows of capacitors may be parallel with a symmetric cross section as viewed from an end of the array of capacitors. The high-voltage power supply may also include diodes electrically coupled to the array of capacitors.

公开(公告)号：US20140183348A1

公开(公告)日：2014-07-03

申请号：US13728950

申请日：2012-12-27

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Jani Reijonen ,  Luke Perkins ,  Harold Pfutzner

IPC: H01J27/20 ,  G01V5/08

CPC classification number: H01J27/205 ,  G01V5/085 ,  H01J1/3044 ,  H01J3/04 ,  H01J2201/30411

Abstract: An ion source for use in a particle accelerator includes at least one cathode. The at least one cathode has an array of nano-sized projections and an array of gates adjacent the array of nano-sized projections. The array of nano-sized projections and the array of gates have a first voltage difference such that an electric field in the cathode causes electrons to be emitted from the array of nano-sized projections and accelerated downstream. There is a ion source electrode downstream of the at least one cathode, and the at least one cathode and the ion source electrode have the same voltage applied such that the electrons enter the space encompassed by the ion source electrode, some of the electrons as they travel within the ion source electrode striking an ionizable gas to create ions.

Abstract translation: 用于粒子加速器的离子源包括至少一个阴极。 所述至少一个阴极具有纳米尺寸突起的阵列和与纳米尺寸突起阵列相邻的栅极阵列。 纳米尺寸突起阵列和栅极阵列具有第一电压差，使得阴极中的电场使电子从纳米尺寸突起阵列发射并加速下游。 在至少一个阴极的下游存在离子源电极，并且至少一个阴极和离子源电极施加相同的电压，使得电子进入由离子源电极包围的空间中，一些电子就像它们 在离子源电极内行进进入可电离气体以产生离子。

公开(公告)号：US11665806B2

公开(公告)日：2023-05-30

申请号：US16722887

申请日：2019-12-20

Applicant: Schlumberger Technology Corporation

Inventor： Jani Reijonen ,  Vincent Ernst

IPC: G01V5/10 ,  G01V5/12 ,  H05G1/52 ,  H01J35/14 ,  G01N23/203

CPC classification number: H05G1/52 ,  G01V5/10 ,  G01V5/12 ,  H01J35/153 ,  G01N2223/053 ,  G01N2223/063 ,  G01N2223/106 ,  G01N2223/1016 ,  G01N2223/304 ,  G01N2223/616

Abstract: The present disclosure relates to a downhole tool that includes a first photon flux detector disposed at a first radial position about a longitudinal axis of the downhole tool that measures a first signal indicative of an x-ray flux of the x-ray photons. The downhole tool also includes a second photon flux detector disposed at a second radial position about the longitudinal axis of the downhole tool that measures a second signal indicative of the x-ray flux of the x-ray photons. Further, the downhole tool includes a controller communicatively coupled to the first photon flux detector and the second photon flux detector that determines a condition associated with the electron beam based at least in part on a relative x-ray flux from the first photon flux detector and the second photon flux detector.

公开(公告)号：US09805904B2

公开(公告)日：2017-10-31

申请号：US14539670

申请日：2014-11-12

Applicant: Schlumberger Technology Corporation

Inventor： Jani Reijonen ,  Matthieu Simon

IPC: H01J35/14 ,  G01V5/12 ,  H01J9/18 ,  H05G1/06

CPC classification number: H01J35/14 ,  G01V5/12 ,  H01J9/18 ,  H05G1/06

Abstract: A radiation generator may include an elongate generator housing having a proximal end and a distal end, a target electrode within the housing at the distal end thereof, a charged particle source within the housing at the proximal end thereof to direct charged particles at the target based upon a first biasing potential, and a field shaping electrode within the housing and adjacent the source to shape a field within the housing. At least one accelerator electrode may be within the housing on an opposite side of the field shaping electrode from the source to accelerate charged particles from the source to the target based upon a second biasing potential different than the first biasing potential. The field shaping electrode may be electrically floating so that the charged particles are directed from the source to the target without applying a biasing potential to the field shaping electrode.

公开(公告)号：US08866068B2

公开(公告)日：2014-10-21

申请号：US13728950

申请日：2012-12-27

Applicant: Schlumberger Technology Corporation

Inventor： Jani Reijonen ,  Luke Perkins ,  Harold Pfutzner

IPC: G01V5/00 ,  H01J27/20 ,  G01V5/08

CPC classification number: H01J27/205 ,  G01V5/085 ,  H01J1/3044 ,  H01J3/04 ,  H01J2201/30411

Abstract: An ion source for use in a particle accelerator includes at least one cathode. The at least one cathode has an array of nano-sized projections and an array of gates adjacent the array of nano-sized projections. The array of nano-sized projections and the array of gates have a first voltage difference such that an electric field in the cathode causes electrons to be emitted from the array of nano-sized projections and accelerated downstream. There is a ion source electrode downstream of the at least one cathode, and the at least one cathode and the ion source electrode have the same voltage applied such that the electrons enter the space encompassed by the ion source electrode, some of the electrons as they travel within the ion source electrode striking an ionizable gas to create ions.

Abstract translation: 用于粒子加速器的离子源包括至少一个阴极。 所述至少一个阴极具有纳米尺寸突起的阵列和邻近纳米尺寸突起阵列的门阵列。 纳米尺寸突起阵列和栅极阵列具有第一电压差，使得阴极中的电场使电子从纳米尺寸突起阵列发射并加速下游。 在至少一个阴极的下游存在离子源电极，并且至少一个阴极和离子源电极施加相同的电压，使得电子进入由离子源电极包围的空间中，一些电子就像它们 在离子源电极内行进进入可电离气体以产生离子。

公开(公告)号：US11899159B2

公开(公告)日：2024-02-13

申请号：US16838490

申请日：2020-04-02

Applicant: Schlumberger Technology Corporation

Inventor： Jani Reijonen ,  Kevin McFarland

IPC: G01V5/08 ,  G01V5/12 ,  H01J29/48 ,  H05H5/06 ,  H01J35/06 ,  H01J35/04 ,  H01J35/14 ,  H05G1/08 ,  H01J35/32 ,  H01J35/18 ,  H01J35/16 ,  H01J35/08

CPC classification number: G01V5/08 ,  G01V5/125 ,  H01J29/481 ,  H01J35/045 ,  H01J35/064 ,  H01J35/14 ,  H01J35/16 ,  H01J35/186 ,  H01J35/32 ,  H05G1/085 ,  H05H5/06 ,  H01J35/116

Abstract: A beam injector may include a cathode emitter to emit electrons and an electrode to bias at least a portion of the electrons to remain on the cathode emitter and focus the emitted electrons into an electron beam. The beam injector may also include a resistor coupled between the cathode emitter and the electrode and configured to allow self-regulation of a voltage potential on the electrode based at least in part on a current of the electron beam.

公开(公告)号：US20200321182A1

公开(公告)日：2020-10-08

申请号：US16838490

申请日：2020-04-02

Applicant: Schlumberger Technology Corporation

Inventor： Jani Reijonen ,  Kevin McFarland

IPC: H01J29/48 ,  H01J35/06 ,  G01V5/12 ,  H05H5/06

Abstract: A beam injector may include a cathode emitter to emit electrons and an electrode to bias at least a portion of the electrons to remain on the cathode emitter and focus the emitted electrons into an electron beam. The beam injector may also include a resistor coupled between the cathode emitter and the electrode and configured to allow self-regulation of a voltage potential on the electrode based at least in part on a current of the electron beam.

公开(公告)号：US09791592B2

公开(公告)日：2017-10-17

申请号：US14539685

申请日：2014-11-12

Applicant: Schlumberger Technology Corporation

Inventor： Jani Reijonen

IPC: H01J35/00 ,  H01J35/02 ,  H01J35/04 ,  H01J35/14 ,  H01J35/16 ,  G01V5/04 ,  G01V5/12 ,  H01J35/32

CPC classification number: G01V5/04 ,  G01V5/125 ,  H01J35/00 ,  H01J35/02 ,  H01J35/025 ,  H01J35/04 ,  H01J35/045 ,  H01J35/14 ,  H01J35/16 ,  H01J35/32

Abstract: A radiation generator may include an elongate generator housing having a proximal end and a distal end, a target electrode within the elongate generator housing at the distal end thereof, a charged particle source within the elongate generator housing at the proximal end thereof to direct charged particles at the target electrode. A plurality of accelerator electrodes may be spaced apart within the elongate generator housing between the target electrode and the charged particle source to define a charged particle accelerator section. Each accelerator electrode may include an annular portion having a first opening therein, and a frustoconical portion having a base coupled to the first opening of the annular portion and having a second opening so that charged particles from the charged particle source pass through the first and second openings to reach the target electrode.

公开(公告)号：US20160133432A1

公开(公告)日：2016-05-12

申请号：US14539670

申请日：2014-11-12

Applicant: Schlumberger Technology Corporation

Inventor： Jani Reijonen ,  Matthieu Simon

IPC: H01J35/14 ,  H01J35/16 ,  H01J9/18 ,  G01V5/12

CPC classification number: H01J35/14 ,  G01V5/12 ,  H01J9/18 ,  H05G1/06

Abstract: A radiation generator may include an elongate generator housing having a proximal end and a distal end, a target electrode within the housing at the distal end thereof, a charged particle source within the housing at the proximal end thereof to direct charged particles at the target based upon a first biasing potential, and a field shaping electrode within the housing and adjacent the source to shape a field within the housing. At least one accelerator electrode may be within the housing on an opposite side of the field shaping electrode from the source to accelerate charged particles from the source to the target based upon a second biasing potential different than the first biasing potential. The field shaping electrode may be electrically floating so that the charged particles are directed from the source to the target without applying a biasing potential to the field shaping electrode.

Abstract translation: 辐射发生器可以包括具有近端和远端的细长的发生器壳体，在其远端处的壳体内的靶电极，在其近端处的壳体内的带电粒子源，以将带电粒子引导到基于靶 在第一偏置电位之内，以及场外成形电极在壳体内并与源极相邻以在壳体内成形场。 至少一个加速器电极可以在场外成形电极的与源极相反的一侧的壳体内，以基于不同于第一偏置电位的第二偏置电位将带电粒子从源极加速到目标。 场成形电极可以是电浮置的，使得带电粒子从源极引导到靶，而不向场成形电极施加偏置电位。

公开(公告)号：US09322262B2

公开(公告)日：2016-04-26

申请号：US13718888

申请日：2012-12-18

Applicant: Schlumberger Technology Corporation

Inventor： Leo Chirovsky ,  Luke Perkins ,  Jani Reijonen ,  Loic Vilde

IPC: G01N23/00 ,  H05H3/06 ,  E21B47/00 ,  G01N33/24 ,  G21G4/02

CPC classification number: E21B47/00 ,  G01N23/005 ,  G01N33/24 ,  G21G4/02 ,  H05H3/06

Abstract: A method for operating a pulsed neutron generator including an ionizer with an electron emitting cathode and a grid wherein the cathode and grid are disposed in a sealed chamber. At least one of the following is applicable to the ionizer; a distance between the cathode and the grid, a cathode current and/or a potential on the grid are selected such that the ionizer operates at most about one-half the space charge limited current for a grid current selected to provide a predetermined amount of neutron production.

Abstract translation: 一种用于操作脉冲中子发生器的方法，其包括具有电子发射阴极和栅极的电离器，其中阴极和栅极设置在密封室中。 以下至少一项适用于电离器; 选择阴极和栅极之间的距离，栅极上的阴极电流和/或电势，使得电离器对于选择用于提供预定量的中子的电网电流的空间电荷限制电流的至多约一半的操作 生产。