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    Neutron imaging devices for cased wells and open boreholes
    5.
    发明授权
    Neutron imaging devices for cased wells and open boreholes 有权

    公开(公告)号：US11163089B2

    公开(公告)日：2021-11-02

    申请号：US16522877

    申请日：2019-07-26

    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

    Inventor： Harold Pfutzner ,  Mohammed Badri ,  Mustapha Abbad

    IPC: G01N23/22 ,  G01V5/10 ,  E21B49/00 ,  G01N23/02 ,  G01N23/223 ,  G01V5/08 ,  G01V5/04

    Abstract: A neutron imaging device employs a neutron source including a sealed enclosure, gamma ray detector(s) spaced from the neutron source, and particle detector(s) disposed in the sealed enclosure of the neutron source. The output of the particle detector(s) can be used to obtain a direction of particles generated by the neutron source and corresponding directions of neutrons generated by the neutron source. Such information can be processed to determine locations in the surrounding borehole environment where the secondary gamma rays are generated and determine data representing formation density at such locations. In one aspect, the gamma ray detector(s) of the neutron imaging device can include at least one scintillation crystal with shielding disposed proximate opposite ends of the scintillation crystal. In another aspect, the particle detector(s) of the neutron imaging device can include a resistive anode encoder having a ceramic substrate and resistive glaze.

    NEUTRON IMAGING DEVICES FOR CASED WELLS AND OPEN BOREHOLES
    6.
    发明申请
    NEUTRON IMAGING DEVICES FOR CASED WELLS AND OPEN BOREHOLES 有权

    公开(公告)号：US20210026034A1

    公开(公告)日：2021-01-28

    申请号：US16522877

    申请日：2019-07-26

    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

    Inventor： Harold Pfutzner ,  Mohammed Badri ,  Mustapha Abbad

    IPC: G01V5/10 ,  G01N23/223 ,  G01N23/02 ,  E21B49/00

    Abstract: A neutron imaging device employs a neutron source including a sealed enclosure, gamma ray detector(s) spaced from the neutron source, and particle detector(s) disposed in the sealed enclosure of the neutron source. The output of the particle detector(s) can be used to obtain a direction of particles generated by the neutron source and corresponding directions of neutrons generated by the neutron source. Such information can be processed to determine locations in the surrounding borehole environment where the secondary gamma rays are generated and determine data representing formation density at such locations. In one aspect, the gamma ray detector(s) of the neutron imaging device can include at least one scintillation crystal with shielding disposed proximate opposite ends of the scintillation crystal. In another aspect, the particle detector(s) of the neutron imaging device can include a resistive anode encoder having a ceramic substrate and resistive glaze.

    ION SOURCE WITH CATHODE HAVING AN ARRAY OF NANO-SIZED PROJECTIONS
    10.
    发明申请
    ION SOURCE WITH CATHODE HAVING AN ARRAY OF NANO-SIZED PROJECTIONS 有权
    具有纳米尺寸投影阵列的阴极的离子源

    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。

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