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Class Information
Number: 73/152.48
Name: Measuring and testing > Borehole or drilling (e.g., drill loading factor, drilling rate, rate of fluid flow) > During drilling > Downhole measurement > Force
Description: Subject matter wherein the determination of the physical characteristic of the borehole, the casing, or the drill rigging is made by measuring an agency or an influence that if applied to a free body results chiefly in acceleration of the body and sometimes in elastic deformation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7171851 |
Temperature compensated strain measurement |
Feb. 6, 2007 |
| 7108081 |
Instrumented internal blowout preventer valve for measuring drill string drilling parameters |
Sep. 19, 2006 |
| 6957575 |
Apparatus for weight on bit measurements, and methods of using same |
Oct. 25, 2005 |
| 6957580 |
System and method for measurements of depth and velocity of instrumentation within a wellbore |
Oct. 25, 2005 |
| 6957574 |
Well integrity monitoring system |
Oct. 25, 2005 |
| 6843120 |
Apparatus and method of monitoring and signaling for downhole tools |
Jan. 18, 2005 |
| 6802215 |
Apparatus for weight on bit measurements, and methods of using same |
Oct. 12, 2004 |
| 6662645 |
Apparatus and method for measuring forces on well logging instruments |
Dec. 16, 2003 |
| 6550322 |
Hydraulic strain sensor |
Apr. 22, 2003 |
| 6450022 |
Apparatus for measuring forces on well logging instruments |
Sep. 17, 2002 |
| 6389890 |
Hydraulic strain sensor |
May. 21, 2002 |
| 5833015 |
Method and apparatus for sinking pipes or cables into a pilot borehole |
Nov. 10, 1998 |
| 5739431 |
Miniature magnetometer-accelerometer |
Apr. 14, 1998 |
| 5608162 |
Method and system of trajectory prediction and control using PDC bits |
Mar. 4, 1997 |
| 5347859 |
Dynamometric measuring device for a drill pipe |
Sep. 20, 1994 |
| 5205163 |
Method and apparatus for determining the torque applied to a drillstring at the surface |
Apr. 27, 1993 |
| 5050690 |
In-situ stress measurement method and device |
Sep. 24, 1991 |
| 4958517 |
Apparatus for measuring weight, torque and side force on a drill bit |
Sep. 25, 1990 |
| 4958125 |
Method and apparatus for determining characteristics of the movement of a rotating drill string including rotation speed and lateral shocks |
Sep. 18, 1990 |
| 4941951 |
Method for improving a drilling process by characterizing the hydraulics of the drilling system |
Jul. 17, 1990 |
| 4926686 |
Method for determining the wear of the cutting means of a tool during drilling a rocky formation |
May. 22, 1990 |
| 4821563 |
Apparatus for measuring weight, torque and side force on a drill bit |
Apr. 18, 1989 |
| 4813274 |
Method for measurement of azimuth of a borehole while drilling |
Mar. 21, 1989 |
| 4811597 |
Weight-on-bit and torque measuring apparatus |
Mar. 14, 1989 |
| 4805449 |
Apparatus and method for measuring differential pressure while drilling |
Feb. 21, 1989 |
| 4695957 |
Drilling monitor with downhole torque and axial load transducers |
Sep. 22, 1987 |
| 4608861 |
MWD tool for measuring weight and torque on bit |
Sep. 2, 1986 |
| 4597289 |
Device for measuring stresses transmitted by a shaft, in particular to a drill bit |
Jul. 1, 1986 |
| 4515011 |
Torque transmitting and indicating device for well drilling apparatus |
May. 7, 1985 |
| 4409824 |
Fatigue gauge for drill pipe string |
Oct. 18, 1983 |
| 4359898 |
Weight-on-bit and torque measuring apparatus |
Nov. 23, 1982 |
| 4359899 |
Weight on drill bit measuring apparatus |
Nov. 23, 1982 |
| 4120198 |
Weight-on-bit measuring apparatus |
Oct. 17, 1978 |
| 3981186 |
Device for blocking at a given torque a rotating machine driven by a hydraulic turbine |
Sep. 21, 1976 |
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