Inventor

SWITZER DAVID A

CA82 patents

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

SWITZER DAVID A

EVOLUTION ENGINEERING INC

Universal downhole probe system

Detection of downhole data telemetry signals

Mounting and component holder apparatuses and assemblies for holding rigid components

Integrated downhole system with plural telemetry subsystems

Downhole electromagnetic and mud pulse telemetry apparatus

Drill collar with integrated probe centralizer

Downhole electromagnetic and mud pulse telemetry apparatus

Downhole pocket electronics

Downhole probes and systems

Downhole telemetry signal modulation using pressure pulses of multiple pulse heights

Fluid pressure pulse generating apparatus with primary seal assembly, back up seal assembly and pressure compensation device and method of operating same

Fluid pressure pulse generator and method of using same

Optimizing downhole data communication with at bit sensors and nodes

Optimizing electromagnetic telemetry transmissions

Integrated downhole system with plural telemetry subsystems

Mounting and component holder apparatuses and assemblies for holding rigid components

Methods and apparatus for downhole probes

Electromagnetic telemetry gap sub assembly with insulating collar

Downhole electromagnetic and mud pulse telemetry apparatus

Axially-supported downhole probes

Pinned electromagnetic telemetry gap sub assembly

Electromagnetic telemetry gap sub assembly with insulating collar

Axially-supported downhole probes

Method and apparatus for multi-channel downhole electromagnetic telemetry

Electromagnetic communications system and method for a drilling operation

Mud pulse telemetry apparatus with a pressure transducer and method of operating same

Methods and apparatus for generating electromagnetic telemetry signals

Fluid pressure pulse generating apparatus and method of using same

System and method for regulating an electromagnetic telemetry signal sent from downhole to surface

Fluid pressure pulse generating apparatus with primary seal assembly, back up seal assembly and pressure compensation device and method of operating same

Optimizing electromagnetic telemetry transmissions

Method and apparatus for placing receiver electrodes for EM telemetry transmissions

Mud pulse telemetry apparatus with a pressure transducer and method of operating same

Downhole telemetry

Method and system for transmitting a data frame of an electromagnetic telemetry signal to or from a downhole location

Integrated downhole system with plural telemetry subsystems

Integrated downhole system with plural telemetry subsystems

Downhole electromagnetic and mud pulse telemetry apparatus

Method and apparatus for detecting gamma radiation downhole

Multi-mode control of downhole tools

Integrated downhole system with plural telemetry subsystems

Rotary locking sub for angular alignment of downhole sensors with high side in directional drilling

Universal downhole probe system

Electromagnetic communications system and method for a drilling operation

Axially-supported downhole probes

Integrated downhole system with plural telemetry subsystems

Apparatus for angular alignment of downhole sensors with high side in directional drilling

GEONOMIC TECH INC

Method and apparatus for measuring a wellbore

Method and apparatus for measuring a wellbore

CAMWELL PAUL L

Spindle for mud pulse telemetry applications