Inventor

ZHANG LIZHENG

US38 patents

⚠️ This page may combine multiple inventors who share the name “ZHANG LIZHENG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ZHANG LIZHENG

HALLIBURTON ENERGY SERVICES INC

Pressurized NMR core analyzer

Rotary steerable system with multiple rows of actuators

Centralizer with opposing hollow spring structure

Centralizer with opposing projections

Centralizer with elongated rods

Centralizer with opposing hollow spring structure

Steering actuation mechanism

Downhole sensor for formation fluid property measurement

Filtering of RSS pad noise in mud pulse telemetry systems and detection of RSS pad leaks

Steering valve for deactivating a steering pad of a rotary steerable system

Secondary steering pad retention mechanism

Shear pin for deactivating a steering pad of a rotary steerable system

Steering valve for deactivating a steering pad of a rotary steerable system

Eccentric centralizer

Downhole machining tool

Thermal management system for downhole tools

Sonde centralization inside a collar

Rotary steerable system steering pad actuator for wellbore drilling

Rotary steerable system for wellbore drilling

Wireline cable fatigue monitoring using thermally-induced acoustic waves

Formation fluid sampling methods and systems

Customized centralizing housing for downhole tool

Downhole formation fluid viscometer sensor

ZHANG LIZHENG

Method and system for performing statistical leakage characterization, analysis, and modeling

Statistical static timing analysis of signal with crosstalk induced delay change in integrated circuit

Efficient statistical timing analysis of circuits

Method and system for performing statistical leakage characterization, analysis, and modeling

Method and apparatus for formation testing and sampling when performing subterranean operations

Statistical iterative timing analysis of circuits having latches and/or feedback loops

WISCONSIN ALUMNI RES FOUND

Efficient statistical timing analysis of circuits

Statistical iterative timing analysis of circuits having latches and/or feedback loops

ZHANG WEI

Measuring fluid conductivity

Downhole fluid resistivity sensor systems and methods

CADENCE DESIGN SYSTEMS INC

Method and system for crosstalk analysis

IBM

Method, system, and program product for accommodating spatially-correlated variation in a process parameter

GEORGIA TECH RES INST

Inspection systems and methods

ZHENGXINYUAN TECH HANGZHOU CO LTD

Simultaneous placement and routing based method and apparatus for incremental design optimization, and computer device

DIRKSEN RONALD JOHANNES

Formation environment sampling apparatus, systems, and methods