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:
Aug. 25, 2015
Filed:
Nov. 21, 2012
College of Petroleum Engineering, China University of Petroleum—beijing (Cupb), Changping District, Beijing, CN;
Gensheng Li, Beijing, CN;
Jilei Niu, Shandong, CN;
Zhongwei Huang, Beijing, CN;
Huaizhong Shi, Beijing, CN;
Shouceng Tian, Beijing, CN;
Jiasheng Fu, Beijing, CN;
China University of Petroleum-Beijing (CUPB), Changping District, Beijing, CN;
Abstract
An impulse-type underground supercharged jet drilling method and device. The impulse-type underground supercharged jet drilling method uses up and down vibrations of a drill string or weight on bit variation during the drilling process, so that an upper joint connected to the drill string drives a housing and a supercharging cylinder block to move up and down relative to a supercharging piston, while the supercharging piston, a high pressure line, and a drive shaft disposed outside the high pressure line make a reciprocally retractable movement relative to the housing. As a result, some working fluid entering the supercharging cylinder block is intermittently supercharged, and discharged from a high pressure fluid passage disposed in the supercharging piston and the high pressure line. The device effectively imparts an underground supercharging to parts of the drilling fluid, thus improving the rock breaking efficiency and the drilling speed.