US5253939A
|
|
High performance bearing pad for thrust bearing
|
US5267398A
|
|
Method for manufacturing a diamond thrust bearing
|
US5146433A
|
|
Mud pump noise cancellation system and method
|
US5181576A
|
|
Downhole adjustable stabilizer
|
US5275040A
|
|
Method of and apparatus for detecting an influx into a well while drilling
|
US5092687A
|
|
Diamond thrust bearing and method for manufacturing same
|
US5139094A
|
|
Directional drilling methods and apparatus
|
US5154078A
|
|
Kick detection during drilling
|
US5033557A
|
|
Hydraulic drilling jar
|
US5063776A
|
|
Method and system for measurement of fluid flow in a drilling rig return line
|
US4976143A
|
|
System and method for monitoring drill bit depth
|
US4941951A
|
|
Method for improving a drilling process by characterizing the hydraulics of the drilling system
|
US4949575A
|
|
Formation volumetric evaluation while drilling
|
US4956921A
|
|
Method to improve directional survey accuracy
|
US4887464A
|
|
Measurement system and method for quantitatively determining the concentrations of a plurality of gases in drilling mud
|
US4852399A
|
|
Method for determining drilling conditions while drilling
|
US4833914A
|
|
Pore pressure formation evaluation while drilling
|
US4876886A
|
|
Method for detecting drilling events from measurement while drilling sensors
|
US4805449A
|
|
Apparatus and method for measuring differential pressure while drilling
|
US4847815A
|
|
Sinusoidal pressure pulse generator for measurement while drilling tool
|