Lei Cha

City:

Chengdu

Country:

China

Published Applications:

Last publication date:

2026-02-12

Top Assignees for applications by Lei Cha

The entities that hold a legal rights for patent applications filed by inventor Cha Lei:

Lei Cha from Chengdu, CN has applied for patents for these inventions. The list has both pending applications and granted patents:

Intelligent Centralizer for Multi-Stage Diameter Reduction

INTELLIGENT DIRECTIONAL DEVICE FOR FULL ROTATION OF DRILL STRING

Intelligent directional device for full rotation of drill string

Directional Well Hydraulic Clutch Drill String Full Rotation Controller

All-metal intelligent control motor

High-frequency composite impactor

Drill string rotation controller for directional drilling

Fracking tool with electromagnetic intelligent control sliding sleeve

InventorID:

6593607 ⎘