Indicator of direction of force traversing natural media > Borehole direction or inclination > Fluid (e.g., drilling fluid, etc.) responsive > Patents

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Class Information
Number: 33/306
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Borehole direction or inclination > Fluid (e.g., drilling fluid, etc.) responsive
Description: Device wherein the borehole direction or inclination indicator reacts to or is controlled by the presence or motion of a fluid within the borehole.

Sub-classes under this class:

Class Number	Class Name	Patents
33/307	Varied pressure or pressure pulses representative	15

Patents under this class:

Patent Number	Title Of Patent	Date Issued
6931741	Scale device	Aug. 23, 2005
5112126	Apparatuses and methods for making geophysical measurements useful in determining the deflection of the vertical	May. 12, 1992
4802150	Mud pressure control system with magnetic torque transfer	Jan. 31, 1989
4636995	Mud pressure control system	Jan. 13, 1987
3983948	Method and apparatus for indicating the orientation of a down hole drilling assembly	Oct. 5, 1976