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Class Information
Number: 73/152.44
Name: Measuring and testing > Borehole or drilling (e.g., drill loading factor, drilling rate, rate of fluid flow) > During drilling > Drill depth rate
Description: Subject matter wherein the drill rigging includes a drill and the determination of the physical characteristic of the borehole, the casing, or the drill rigging is made by either (a) measuring the rate at which the drill cuts through the formation, or (b) periodically measuring the depth of the drill which is utilized to compute the rate at which the drill cuts through the formation.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7412331 |
Method for predicting rate of penetration using bit-specific coefficient of sliding friction and mechanical efficiency as a function of confined compressive strength |
Aug. 12, 2008 |
| 6363780 |
Method and system for detecting the longitudinal displacement of a drill bit |
Apr. 2, 2002 |
| 6131673 |
Method of assaying downhole occurrences and conditions |
Oct. 17, 2000 |
| 5844132 |
Method and system for real-time estimation of at least one parameter linked with the behavior of a downhole tool |
Dec. 1, 1998 |
| 5794720 |
Method of assaying downhole occurrences and conditions |
Aug. 18, 1998 |
| 5581024 |
Downhole depth correlation and computation apparatus and methods for combining multiple borehole measurements |
Dec. 3, 1996 |
| 5398546 |
Determination of drill bit rate of penetration from surface measurements |
Mar. 21, 1995 |
| 5321982 |
Method for measuring the rate of penetration of an equipment progressing in a well |
Jun. 21, 1994 |
| 5274552 |
Drill string motion detection for bit depth calculation |
Dec. 28, 1993 |
| 4961343 |
Method for determining permeability in hydrocarbon wells |
Oct. 9, 1990 |
| 4845628 |
Method for optimization of drilling costs |
Jul. 4, 1989 |
| 4794535 |
Method for determining economic drill bit utilization |
Dec. 27, 1988 |
| 4747303 |
Method determining formation dip |
May. 31, 1988 |
| 4685329 |
Assessment of drilling conditions |
Aug. 11, 1987 |
| 4627276 |
Method for measuring bit wear during drilling |
Dec. 9, 1986 |
| 4419886 |
Rate of penetration sensor for oil drilling rigs |
Dec. 13, 1983 |
| 4389885 |
Signal generator for a penetration rate measuring apparatus |
Jun. 28, 1983 |
| 4367477 |
Rate of penetration recorder |
Jan. 4, 1983 |
| 4138886 |
Method and apparatus to measure the rate of advance of a drilling tool on a floating drilling installation |
Feb. 13, 1979 |
| 4085509 |
Apparatus for compensating for the heaving of a floating drilling platform for connection with apparatus for measuring the rate of penetration of pipe run into an offshore well |
Apr. 25, 1978 |
| 4064749 |
Method and system for determining formation porosity |
Dec. 27, 1977 |
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