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Patents Grants
last 30 patents
Information
Patent Grant
Expansion tool assembly for expandable tubular
Patent number
11,293,254
Issue date
Apr 5, 2022
China National Petroleum Corporation
Quanli Zhang
E21 - EARTH DRILLING MINING
Information
Patent Grant
Expandable liner hanger
Patent number
10,858,917
Issue date
Dec 8, 2020
CNPC ENGINEERING TECHNOLOGY R&D COMPANY LIMITED
Quanli Zhang
E21 - EARTH DRILLING MINING
Information
Patent Grant
Mechanical and hydraulic dual-effect expansion device for well dril...
Patent number
10,641,067
Issue date
May 5, 2020
China National Petroleum Corporation
Binggui Xu
E21 - EARTH DRILLING MINING
Information
Patent Grant
Casing windowing method and tool using coiled tubing
Patent number
10,450,801
Issue date
Oct 22, 2019
China National Petroleum Corporation
Yanping Zhang
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
EXPANSION TOOL ASSEMBLY FOR EXPANDABLE TUBULAR
Publication number
20210396092
Publication date
Dec 23, 2021
CHINA NATIONAL PETROLEUM CORPORATION
Quanli Zhang
E21 - EARTH DRILLING MINING
Information
Patent Application
Expandable Liner Hanger
Publication number
20200332629
Publication date
Oct 22, 2020
CNPC Engineering Technology R&D Company Limited
Quanli Zhang
E21 - EARTH DRILLING MINING
Information
Patent Application
MECHANICAL AND HYDRAULIC DUAL-EFFECT EXPANSION DEVICE FOR WELL DRIL...
Publication number
20180202267
Publication date
Jul 19, 2018
CHINA NATIONAL PETROLEUM CORPORATION
Binggui XU
E21 - EARTH DRILLING MINING
Information
Patent Application
CASING WINDOWING METHOD AND TOOL USING COILED TUBING
Publication number
20170152718
Publication date
Jun 1, 2017
CHINA NATIONAL PETROLEUM CORPORATION
Yanping ZHANG
E21 - EARTH DRILLING MINING