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Wuhan, CN
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Patents Grants
last 30 patents
Information
Patent Grant
Multiple ridge diamond compact for drill bit and drill bit
Patent number
11,725,459
Issue date
Aug 15, 2023
KINGDREAM PUBLIC LIMITED COMPANY
Qiang Liu
E21 - EARTH DRILLING MINING
Information
Patent Grant
Polycrystalline diamond compact and drilling bit
Patent number
11,391,095
Issue date
Jul 19, 2022
KINGDREAM PUBLIC LIMITED COMPANY
Hongping Tian
E21 - EARTH DRILLING MINING
Information
Patent Grant
Hybrid bit with roller cones having inserts
Patent number
11,326,402
Issue date
May 10, 2022
KINGDREAM PUBLIC LIMITED COMPANY
Guanfu Tu
E21 - EARTH DRILLING MINING
Information
Patent Grant
Tricone rock bit for horizontal wells and hard formation wells
Patent number
9,410,378
Issue date
Aug 9, 2016
KINGDREAM PUBLIC LTD. CO.
Zengyuan Shao
E21 - EARTH DRILLING MINING
Information
Patent Grant
Tri-cone bit for high RPM drilling applications
Patent number
9,238,944
Issue date
Jan 19, 2016
Kingdream Public Ltd. Co.
Hongping Tian
E21 - EARTH DRILLING MINING
Information
Patent Grant
Tube welding rod resistant to high stress abrasion
Patent number
9,199,338
Issue date
Dec 1, 2015
KINGDREAM PUBLIC LIMITED COMPANY
Liehua Zhang
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Convex crested insert with deflected wedge surfaces
Patent number
8,360,175
Issue date
Jan 29, 2013
Kingdream Public Ltd. Co.
Xiaobing Fan
E21 - EARTH DRILLING MINING
Information
Patent Grant
Roller bit with a journal pin offset from the central axis thereof
Patent number
7,299,887
Issue date
Nov 27, 2007
Kingdream Public Ltd. Co.
Xuezhong Liu
E21 - EARTH DRILLING MINING
Information
Patent Grant
Roller bit parallel inlayed compacts
Patent number
6,595,304
Issue date
Jul 22, 2003
Kingdream Public Limited Company
Zhihua Chen
E21 - EARTH DRILLING MINING
Information
Patent Grant
Bearing sealing means of earth boring bits
Patent number
6,176,331
Issue date
Jan 23, 2001
Kingdream Public Ltd., Co.
Zhi Xun Jin
E21 - EARTH DRILLING MINING
Information
Patent Grant
Single cone earth boring bit
Patent number
6,119,797
Issue date
Sep 19, 2000
Kingdream Public Ltd. Co.
Chunling Hong
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
MULTIPLE RIDGE DIAMOND COMPACT FOR DRILL BIT AND DRILL BIT
Publication number
20210277722
Publication date
Sep 9, 2021
KINGDREAM PUBLIC LIMITED COMPANY
Qiang LIU
E21 - EARTH DRILLING MINING
Information
Patent Application
HYBRID BIT WITH ROLLER CONES HAVING INSERTS
Publication number
20210087886
Publication date
Mar 25, 2021
KINGDREAM PUBLIC LIMITED COMPANY
Guanfu TU
E21 - EARTH DRILLING MINING
Information
Patent Application
A HYBRID BIT WITH ROLLER CONE HAVING INSERTS
Publication number
20200362638
Publication date
Nov 19, 2020
KINGDREAM PUBLIC LIMITED COMPANY
Guanfu TU
E21 - EARTH DRILLING MINING
Information
Patent Application
Polycrystalline Diamond Compact and Drilling Bit
Publication number
20200347680
Publication date
Nov 5, 2020
KINGDREAM PUBLIC LIMITED COMPANY
Hongping TIAN
E21 - EARTH DRILLING MINING
Information
Patent Application
TUBE WELDING ROD RESISTANT TO HIGH STRESS ABRASION
Publication number
20140305922
Publication date
Oct 16, 2014
KINGDREAM PUBLIC LIMITED COMPANY
Liehua Zhang
C21 - METALLURGY OF IRON
Information
Patent Application
TUBE WELDING ROD RESISTANT TO LOW STRESS ABRASION
Publication number
20140238193
Publication date
Aug 28, 2014
KINGDREAM PUBLIC LIMITED COMPANY
Liehua Zhang
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Application
TRICONE ROCK BIT FOR HORIZONTAL WELLS AND HARD FORMATION WELLS
Publication number
20140116787
Publication date
May 1, 2014
Kingdream Public Ltd. Co.
Zengyuan Shao
E21 - EARTH DRILLING MINING
Information
Patent Application
TRI-CONE BIT FOR HIGH RPM DRILLING APPLICATIONS
Publication number
20110220423
Publication date
Sep 15, 2011
Kingdream Public Ltd. Co.
Hongping Tian
E21 - EARTH DRILLING MINING
Information
Patent Application
Convex Crested Insert With Deflected Wedge Surfaces
Publication number
20100300766
Publication date
Dec 2, 2010
KINGDREAM PUBLIC LTD. CO.
Xiaobing Fan
E21 - EARTH DRILLING MINING
Information
Patent Application
Tri-cone bits for horizontal and hard formation drilling applications
Publication number
20100032215
Publication date
Feb 11, 2010
Kingdream Public Ltd. Co.
Zengyuan Shao
E21 - EARTH DRILLING MINING
Trademark
last 30 trademarks
Information
Trademark
76235634 - K
Serial number
76235634
Registration number
2741025
Filing date
Apr 5, 2001
KINGDREAM PUBLIC LIMITED COMPANY
6 - Common metals and their alloys
Information
Trademark
78056886 - JZ
Serial number
78056886
Registration number
2697828
Filing date
Apr 5, 2001
KINGDREAM PUBLIC LIMITED COMPANY
6 - Common metals and their alloys
Information
Trademark
76235107 - KINGDREAM
Serial number
76235107
Registration number
2745918
Filing date
Apr 4, 2001
Kingdream Public Limited Company
6 - Common metals and their alloys