Inventor

VAN STEENWYK DONALD H

US39 patents

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

VAN STEENWYK DONALD H

SCIENT DRILLING INT

Direct switching modulation for electromagnetic borehole telemetry

Apparatus and method for electric field telemetry employing component upper and lower housings in a well pipestring

Electric field borehole telemetry

Apparatus and method for electric field telemetry employing component upper and lower housings in a well pipestring

Wireline wet connection

Valve assembly for borehole telemetry in drilling fluid

Electric field communication for short range data transmission in a borehole

Steerable drilling apparatus having a differential displacement side-force exerting mechanism

Method for magnetizing wellbore tubulars

Method to determine local variations of the earth&#39;s magnetic field and location of the source thereof

Multi-mode cushioning an instrument suspended in a well

Multi-mode cushioning an instrument suspended in a well

Miniature rope socket assembly for combined mechanical and electrical connection in a borehole wireline

Pulse production and control in drill strings

Inertially-stabilized magnetometer measuring apparatus for use in a borehole rotary environment

Inertially-stabilized magnetometer measuring apparatus for use in a borehole rotary environment

Downward communication in a borehole through drill string rotary modulation

Apparatus for locking wire line instrument to drill collar

Motion transducer for motion related to the direction of the axis of an eddy-current displacement sensor

Hydraulic fluid coupling

APPLIED TECH ASS

Casing joint detector

High speed well surveying and land navigation

High speed well surveying and land navigation

Borehole initial alignment and change determination

High speed well surveying

High speed well surveying

Survey apparatus, method employing angular accelerometer

Downhole drill bit drive motor assembly with an integral bilateral signal and power conduction path

Well mapping system and method with sensor output compensation

Survey apparatus and method employing rate-of-turn and free gyroscopes

Feedback-controlled piezoelectric force measuring apparatus

Apparatus and method to communicate information in a borehole

APPLIED TECH ASSOC

Mapping apparatus employing two input axis gyroscopic means

Survey apparatus and method employing all latitude, all attitude gyrocompassing

Survey apparatus and method employing rate-of-turn and free gyroscopes

PRICE TIMOTHY M

Electric field communication for short range data transmission in a borehole

Electric field communication for short range data transmission in a borehole

APPLIED MEDICAL DEVICES

Catheter locating device

SCIENT DRILLING INTERNAT INC

Downhole adjustable bent-angle mechanism for use with a motor for directional drilling

Method to determine local variations of the earth's magnetic field and location of the source thereof