| 发明名称 |
NUCLEAR MAGNETIC RESONANCE APPARATUS, SYSTEMS, AND METHODS |
| 摘要 |
Apparatus and systems include a magnet assembly comprising a central magnet having a first axial end and a second, opposite axial end; a first end piece magnet having a proximal end and a distal end, the proximal end spaced apart from the first axial end of the central magnet; and a second end piece magnet spaced apart from the second axial end of the central magnet; at least one first shim magnet disposed adjacent to or at least partially surrounded by first magnetically permeable material, the at least one first shim magnet disposed next to an end of the first end piece magnet that is proximal to the central magnet, or next to an end of the first end piece magnet that is distal to the central magnet; and a downhole tool attached to the magnet assembly. Additional apparatus, systems, and methods are disclosed. |
| 申请公布号 |
US2017003413(A1) |
申请公布日期 |
2017.01.05 |
| 申请号 |
US201615103782 |
申请日期 |
2016.02.10 |
| 申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
Jachmann Rebecca Corina;Li Lilong;Reiderman Arcady |
| 分类号 |
G01V3/32;E21B47/00;G01R33/34;G01R33/44;G01R33/3875 |
主分类号 |
G01V3/32 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An apparatus, comprising:
a magnet assembly to produce a magnetic field in a volume in a geological formation, the magnet assembly comprising:
a central magnet having a first axial end and a second, opposite axial end;a first end piece magnet spaced apart from the first axial end of the central magnet; anda second end piece magnet spaced apart from the second axial end of the central magnet;at least one first shim magnet disposed between the central magnet and the first end piece magnet, the first shim magnet disposed adjacent to or at least partially surrounded by a first magnetically permeable material, the first shim magnet to shape a first static magnetic field sub-volume provided by the central magnet and the first end piece magnet; and a downhole tool attached to the magnet assembly. |
| 地址 |
Houston TX US |
