Chris Cheng

9 Patents

• US124355852025

  Hydraulic Control Apparatus and Method for a Downhole Tool

  China National Petroleum Corporation

  0 cites
• US123374282025

  Force Modulation Cartridge System for a Drill Bit

  China National Petroleum Corporation

  0 cites
• US122186102025

  Sensor System with an Interior Sensor and a Piezoelectric Power Supply

  China National Petroleum Corporation

  0 cites
• US121041112024

  Unique PDC Microstructure and the Method of Making It

  CHINA NATIONAL PETROLEUM CORPORATION

  0 cites
• US120117732024

  Cutting Elements with Reduced Variable Back Rake Angle

  Beijing Huamei, Inc.

  0 cites
• US118792962024

  Blade Cap Force Modulation System for a Drill Bit

  Beijing Huamei, Inc. CNPC

  0 cites
• US118080902023

  Force Modulation System for a Drill Bit

  Beijing Huamei Inc. CNPC

  0 cites
• US117942902023

  Method for Forming Cutters

  Beijing Huamei, Inc.

  0 cites
• US117028912023

  Force Modulation System with an Elastic Force Member for Downhole Conditions

  Beijing Huamei Inc. CNPC

  0 cites