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:
Oct. 04, 2022
Filed:
Jul. 01, 2021
China University of Geosciences (Beijing), Beijing, CN;
Yu Wang, Beijing, CN;
Jiaxing Lu, Beijing, CN;
Lingrong Kong, Beijing, CN;
Baolin Liu, Beijing, CN;
Kai Zhang, Beijing, CN;
CHINA UNIVERSITY OF GEOSCIENCES (BEIJING), Beijing, CN;
Abstract
A full-metal dynamic-sealed concentrically-centered downhole displacement motor includes an outer tube, a stator fixed in the outer tube, a rotor rotatably connected in the stator, and a flow distribution shaft suspended in the rotor. When the rotor rotates, the plurality of circulation ports is alternately communicated with the flow distribution holes, and an accommodation space for flowing the drilling fluid is formed among the plurality of rotor copper rods; each of the circulation ports has a notch on the side of the rotor copper rod that is in communication with the accommodation space; the stator is provided with pressure relief ports for allowing the annular chamber and the accommodation space to communicate with each other, and the flow distribution hole and the pressure relief port are circumferentially arranged in a staggered manner.