GUAN; Zhichuan

Patent Applications and Registrations

Patent applications and USPTO patent grants for GUAN; Zhichuan.The latest application filed is for "risk assessment-based design method for deep complex formation wellbore structure".

Company Profile

10.8.10

GUAN; Zhichuan - Qingdao CN
GUAN; Zhichuan - Qingdao City CN
Guan; Zhichuan - Shandong CN

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Risk Assessment-based Design Method For Deep Complex Formation Wellbore Structure App 20220170361 - GUAN; Zhichuan ; et al.	2022-06-02
Drill bit with joint function of induced unloading and abrasive jet and drilling method thereof Grant 11,255,127 - Liu , et al. February 22, 2	2022-02-22
Drill Bit With Joint Function Of Induced Unloading And Abrasive Jet And Drilling Method Thereof App 20210246729 - LIU; Yongwang ; et al.	2021-08-12
Drilling speed increasing device driven by downhole motor for generating shock vibration Grant 10,927,607 - Liao , et al. February 23, 2	2021-02-23
Risk Assessment-based Design Method For Deep Complex Formation Wellbore Structure App 20210011194 - GUAN; Zhichuan ; et al.	2021-01-14
Depressuriz od for downhole annulus drilling fluid Grant 10,815,743 - Liu , et al. October 27, 2	2020-10-27
Screw drill bypass valve with large displacement diversion function Grant 10,801,282 - Shi , et al. October 13, 2	2020-10-13
Depressuriz Od For Downhole Annulus Drilling Fluid App 20200270959 - LIU; YONGWANG ; et al.	2020-08-27
Drilling speed improvement device capable of producing both hydraulic pulse and impact vibration Grant 10,718,176 - Liao , et al.	2020-07-21
Drilling Speed Increasing Device Driven By Downhole Motor For Generating Shock Vibration App 20200199959 - LIAO; Hualin ; et al.	2020-06-25
Drilling Speed Improvement Device Capable Of Producing Both Hydraulic Pulse And Impact Vibration App 20200080379 - LIAO; Hualin ; et al.	2020-03-12
Screw Drill Bypass Valve With Large Displacement Diversion Function And A Method Of Using Same App 20190368289 - SHI; Yucai ; et al.	2019-12-05
Weight-on-bit self-adjusting drill bit Grant 10,233,695 - Guan , et al.	2019-03-19
Weight-on-bit Self-adjusting Drill Bit App 20180363381 - GUAN; ZHICHUAN ; et al.	2018-12-20
Method and system for improving drilling speed by using drill speed vibration Grant 9,540,881 - Guan , et al. January 10, 2	2017-01-10
Method And System For Improving Drilling Speed By Using Drill Speed Vibration App 20140166368 - Guan; Zhichuan ; et al.	2014-06-19

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