The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 2017
Filed:
Aug. 28, 2012
Wei Chen, Shandong, CN;
Laiju Han, Shandong, CN;
Zuohui LI, Shandong, CN;
Feng Sun, Shandong, CN;
Yifeng Wang, Shandong, CN;
Qinglong Liu, Shandong, CN;
Fengling Xu, Shandong, CN;
Zhenhua LV, Shandong, CN;
Wei Chen, Shandong, CN;
Laiju Han, Shandong, CN;
Zuohui Li, Shandong, CN;
Feng Sun, Shandong, CN;
Yifeng Wang, Shandong, CN;
Qinglong Liu, Shandong, CN;
Fengling Xu, Shandong, CN;
Zhenhua Lv, Shandong, CN;
CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing, CN;
SHENGLI DRILLING TECHNOLOGY RESEARCH INSTITUTE OF SINOPEC, Dongying, Shandong, CN;
Abstract
The present disclosure relates to a downhole rotating magnetic field generator, wherein a stator assembly is formed by fixedly connecting a guiding stator, windings, and a body together, and a rotor assembly is formed by mounting a turbine rotor and a permanent magnet together. Between the stator assembly and the rotor assembly, sliding bearings are arranged and small mud passages are formed. There is no metal isolation between the rotor and the stator for cutting through the magnetic lines of force, so that the eddy current loss is relatively small. Meanwhile, with mud flowing through the passages as lubricant, overheating of the generator can be prevented and high power output can be ensured.