Naizhen Liu

Follow

Person

Beijing, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Rotary steerable drilling tool with a linear motor
- Patent number 9,447,641
- Issue date Sep 20, 2016
- Naizhen Liu
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
METHOD FOR CONTROLLING DRILLING DIRECTIONS OF A DRILL BIT BY A ROTA...
- Publication number 20160356088
- Publication date Dec 8, 2016
- Naizhen Liu
- E21 - EARTH DRILLING MINING
Information Patent Application
Apparatus and Method for At-Bit Resistivity Measurements
- Publication number 20150035535
- Publication date Feb 5, 2015
- Naizhen Liu
- G01 - MEASURING TESTING
Information Patent Application
Apparatus and Method for At-Bit Resistivity Measurements By A Toroi...
- Publication number 20150028874
- Publication date Jan 29, 2015
- Naizhen Liu
- G01 - MEASURING TESTING
Information Patent Application
ROTARY STEERABLE DRILLING TOOL WITH A LINEAR MOTOR
- Publication number 20140345944
- Publication date Nov 27, 2014
- Naizhen Liu
- E21 - EARTH DRILLING MINING