公开(公告)号：US4704579A

公开(公告)日：1987-11-03

申请号：US694087

申请日：1985-01-23

Applicant: Lawrence A. Pyatt ,  Robert W. Thompson

Inventor： Lawrence A. Pyatt ,  Robert W. Thompson

IPC: E21B47/00 ,  E21B47/09 ,  G01D9/42 ,  G01N27/72 ,  G01V3/10 ,  G01N27/82 ,  G01R33/12

CPC classification number: G01N27/72 ,  E21B47/0002 ,  E21B47/0905 ,  G01D9/42 ,  G01V3/102

Abstract: A combination of magnetics and a special geometric environment is employed to distinguish whether an instrument is positioned within a pipe formed of magnetizable or non-magnetizable material, and is the basis, in part, for a method and an apparatus used in controlling picture taking at the bottom of a well bore. A coil is energized repetitively in a circuit in which the voltage across the coil, or the current that flows through the coil, can be measured. Whether the coil is in a magnetic or non-magnetic environment is determined by the magnitude of the change in coil voltage or current.

Abstract translation: 使用磁性和特殊几何环境的组合来区分仪器是否位于由可磁化或不可磁化的材料形成的管道内，并且部分地基于用于控制图像拍摄的方法和装置的基础 井的底部。 线圈在其中可以测量线圈上的电压或流过线圈的电流的电路中重复地通电。 线圈是否处于磁性或非磁性环境中是由线圈电压或电流变化的大小决定的。

公开(公告)号：US4527122A

公开(公告)日：1985-07-02

申请号：US387598

申请日：1982-06-11

Applicant: Lawrence A. Pyatt ,  Robert W. Thompson

Inventor： Lawrence A. Pyatt ,  Robert W. Thompson

IPC: E21B47/00 ,  E21B47/09 ,  G01D9/42 ,  G01N27/72 ,  G01V3/10 ,  G01N27/82 ,  G01R33/00 ,  G03B37/00

CPC classification number: G01V3/102 ,  E21B47/0002 ,  E21B47/0905 ,  G01D9/42 ,  G01N27/72

Abstract: A combination of magnetics and a special geometric environment is employed to distinguish whether an instrument is positioned within a pipe formed of magnetizable or non-magnetizable material, and is the basis, in part, for a method and an apparatus used in controlling picture taking at the bottom of a well bore. A coil is energized repetitively in a circuit in which the voltage across the coil, or the current that flows through the coil, can be measured. Whether the coil is in a magnetic or non-magnetic environment is determined by the magnitude of the change in coil voltage or current.

Abstract translation: 使用磁性和特殊几何环境的组合来区分仪器是否位于由可磁化或不可磁化的材料形成的管道内，并且部分地基于用于控制图像拍摄的方法和装置的基础 井的底部。 线圈在其中可以测量线圈上的电压或流过线圈的电流的电路中重复地通电。 线圈是否处于磁性或非磁性环境中是由线圈电压或电流变化的大小决定的。

公开(公告)号：US4365197A

公开(公告)日：1982-12-21

申请号：US119171

申请日：1980-02-06

Applicant: Lawrence A. Pyatt ,  Robert W. Thompson

Inventor： Lawrence A. Pyatt ,  Robert W. Thompson

IPC: E21B47/00 ,  E21B47/09 ,  G01D9/42 ,  G01N27/72 ,  G01V3/10 ,  G01N27/82

CPC classification number: G01D9/42 ,  E21B47/0002 ,  E21B47/0905 ,  G01N27/72 ,  G01V3/102

Abstract: A combination of magnetics and a special geometric environment is employed to distinguish whether an instrument is positioned within a pipe formed of magnetizable or non-magnetizable material, and is the basis, in part, for a method and an apparatus used in controlling picture taking at the bottom of a well bore. A coil is energized repetitively in a circuit in which the voltage across the coil, or the current that flows through the coil, can be measured. Whether the coil is in a magnetic or non-magnetic environment is determined by the magnitude of the change in coil voltage or current.

Abstract translation: 使用磁性和特殊几何环境的组合来区分仪器是否位于由可磁化或不可磁化的材料形成的管道内，并且部分地基于用于控制图像拍摄的方法和装置的基础 井的底部。 线圈在其中可以测量线圈上的电压或流过线圈的电流的电路中重复地通电。 线圈是否处于磁性或非磁性环境中是由线圈电压或电流变化的大小决定的。

公开(公告)号：US3302131A

公开(公告)日：1967-01-31

申请号：US54876066

申请日：1966-05-09

Applicant: LAWRENCE A PYATT ,  BERNARD FARMEN ,  CHARLES J LINK ,  HARMON G SCOVILLE ,  THOMPSON ROBERT W

Inventor： PYATT LAWRENCE A

IPC: B06B1/02 ,  H03B5/36

CPC classification number: H03B5/36 ,  B06B1/023 ,  B06B2201/55