公开(公告)号：US20160032708A1

公开(公告)日：2016-02-04

申请号：US14783244

申请日：2014-04-08

Applicant: PRAD RESEARCH AND DEVELOPMENT LIMITED ,  SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Ahmed Amine Mahjoub ,  Sebastien Isambert ,  Emmanuel Fayeulle ,  Didier Fouillou ,  Michael L. Evans ,  Christian Stoller

IPC: E21B47/01 ,  E21B17/10

CPC classification number: E21B47/011 ,  E21B17/1078

Abstract: A downhole tool operable for conveyance within a wellbore extending into a subterranean formation, and for obtaining one or more measurements of the subterranean formation, wherein the downhole tool comprises a sensor, a pressure housing containing the sensor and mounted on an external surface of the downhole tool, and a sliding stabilizer covering the pressure housing.

Abstract translation: 井下工具，其可操作用于在延伸到地下地层内的井筒内传送，并且用于获得地下地层的一个或多个测量值，其中所述井下工具包括传感器，包含所述传感器并安装在所述井下的外表面上的压力壳体 工具和覆盖压力壳体的滑动稳定器。

公开(公告)号：US09897718B2

公开(公告)日：2018-02-20

申请号：US15104354

申请日：2014-12-17

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Marie-Laure Mauborgne ,  Ahmed Amine Mahjoub ,  Markus Berheide ,  Christian Stoller

IPC: G01V5/10

CPC classification number: G01V5/101

Abstract: Methods and downhole tools involving neutron-absorbing gamma ray windows are provided. One such method involves emitting neutrons from a neutron source in a downhole tool in a well into a surrounding geological formation. This may produce formation gamma rays through interactions between the neutrons and elements of the geological formation. The formation gamma rays may be detected by a gamma ray detector when the gamma rays pass via a gamma ray window that includes a neutron-absorbing material disposed in a substrate material of the downhole tool. The gamma ray window may be both more transmissive of gamma rays than the substrate material and less transmissive of neutrons than a window without the neutron-absorbing material. This may decrease a neutron flux that would otherwise reach the gamma ray detector and the tool materials surrounding it and thus would otherwise lead to a background signal contaminating a signal corresponding to the detected formation gamma rays.

公开(公告)号：US20160320521A1

公开(公告)日：2016-11-03

申请号：US15104354

申请日：2014-12-17

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Marie-Laure Mauborgne ,  Ahmed Amine Mahjoub ,  Markus Berheide ,  Christian Stoller

IPC: G01V5/10

CPC classification number: G01V5/101

Abstract: Methods and downhole tools involving neutron-absorbing gamma ray windows are provided. One such method involves emitting neutrons from a neutron source in a downhole tool in a well into a surrounding geological formation. This may produce formation gamma rays through interactions between the neutrons and elements of the geological formation. The formation gamma rays may be detected by a gamma ray detector when the gamma rays pass via a gamma ray window that includes a neutron-absorbing material disposed in a substrate material of the downhole tool. The gamma ray window may be both more transmissive of gamma rays than the substrate material and less transmissive of neutrons than a window without the neutron-absorbing material. This may decrease a neutron flux that would otherwise reach the gamma ray detector and the tool materials surrounding it and thus would otherwise lead to a background signal contaminating a signal corresponding to the detected formation gamma rays.

Abstract translation: 提供了涉及中子吸收伽马射线窗的方法和井下工具。 一种这样的方法包括从井中的井下工具中的中子源发射中子到周围的地质层。 这可能通过中子和地质构造元素之间的相互作用产生形成γ射线。 伽马射线通过包括设置在井下工具的基底材料中的中子吸收材料的伽马射线窗口时，伽马射线检测器可以检测形成γ射线。 与没有中子吸收材料的窗口相比，伽马射线窗口可以比衬底材料更能够透射伽马射线，并且对中子的透射较少。 这可能会降低否则会到达伽马射线探测器和围绕它的工具材料的中子通量，从而否则会导致背景信号污染对应于检测到的地层伽马射线的信号。