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Class Information
Number: 73/152.22
Name: Measuring and testing > Borehole or drilling (e.g., drill loading factor, drilling rate, rate of fluid flow) > Fluid flow measuring or fluid analysis > During drilling > Pressure
Description: Subject matter wherein the determination of the characteristic of the borehole, the casing, or the drill rigging is made by measuring pressure.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7438128 |
Identifying zones of origin of annular gas pressure |
Oct. 21, 2008 |
| 7416023 |
Formation pressure testing apparatus with flexible member and method of formation pressure testing |
Aug. 26, 2008 |
| 7395879 |
MWD formation tester |
Jul. 8, 2008 |
| 7313481 |
Methods and devices for analyzing and controlling the propagation of waves in a borehole generated by water hammer |
Dec. 25, 2007 |
| 7266983 |
Methods to detect formation pressure |
Sep. 11, 2007 |
| 7261168 |
Methods and apparatus for using formation property data |
Aug. 28, 2007 |
| 7201231 |
Apparatuses and methods for deploying logging tools and signalling in boreholes |
Apr. 10, 2007 |
| 7178608 |
While drilling system and method |
Feb. 20, 2007 |
| 7031841 |
Method for determining pressure of earth formations |
Apr. 18, 2006 |
| 6923052 |
Methods to detect formation pressure |
Aug. 2, 2005 |
| 6843119 |
Apparatus for measuring and recording data from boreholes |
Jan. 18, 2005 |
| 6823950 |
Method for formation pressure control while drilling |
Nov. 30, 2004 |
| 6769296 |
Apparatus and method for measuring formation pressure using a nozzle |
Aug. 3, 2004 |
| 6675914 |
Pressure reading tool |
Jan. 13, 2004 |
| 6659197 |
Method for determining drilling fluid properties downhole during wellbore drilling |
Dec. 9, 2003 |
| 6644110 |
Measurements of properties and transmission of measurements in subterranean wells |
Nov. 11, 2003 |
| 6575244 |
System for controlling the operating pressures within a subterranean borehole |
Jun. 10, 2003 |
| 6474152 |
Methods and apparatus for optically measuring fluid compressibility downhole |
Nov. 5, 2002 |
| 6427785 |
Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
Aug. 6, 2002 |
| 6427530 |
Apparatus and method for formation testing while drilling using combined absolute and differential pressure measurement |
Aug. 6, 2002 |
| 6401838 |
Method for detecting stuck pipe or poor hole cleaning |
Jun. 11, 2002 |
| 6308562 |
Technique for signal detection using adaptive filtering in mud pulse telemetry |
Oct. 30, 2001 |
| 6240787 |
Method of determining fluid inflow rates |
Jun. 5, 2001 |
| 6178815 |
Method to improve the quality of a formation fluid sample |
Jan. 30, 2001 |
| 6116340 |
Downhole build-up pressure test using coiled tubing |
Sep. 12, 2000 |
| 6058771 |
Determination of fluid influx or efflux |
May. 9, 2000 |
| 5975219 |
Method for controlling entry of a drillstem into a wellbore to minimize surge pressure |
Nov. 2, 1999 |
| 5846056 |
Reciprocating pump system and method for operating same |
Dec. 8, 1998 |
| 5731517 |
Measuring device used in a four-parameter measuring system and in a high temperature and high pressure condition |
Mar. 24, 1998 |
| 5309761 |
Methods and apparatus for measuring the erodability of drilling fluid deposits |
May. 10, 1994 |
| 5275040 |
Method of and apparatus for detecting an influx into a well while drilling |
Jan. 4, 1994 |
| 5154078 |
Kick detection during drilling |
Oct. 13, 1992 |
| 5052219 |
Procedure and cell for measuring coefficients of adhesion and friction of a drilling fluid |
Oct. 1, 1991 |
| 4733232 |
Method and apparatus for borehole fluid influx detection |
Mar. 22, 1988 |
| 4733233 |
Method and apparatus for borehole fluid influx detection |
Mar. 22, 1988 |
| 4694692 |
Drilling fluid density measurement system |
Sep. 22, 1987 |
| 4606415 |
Method and system for detecting and identifying abnormal drilling conditions |
Aug. 19, 1986 |
| H55 |
Method for improved mud pulse telemetry |
May. 6, 1986 |
| 4510800 |
Drilling mud testing system having a thermally isolated pump |
Apr. 16, 1985 |
| 4483189 |
Flushing apparatus for a drilling mud testing system |
Nov. 20, 1984 |
| 4390291 |
Thermal indicator for wells |
Jun. 28, 1983 |
| 4387774 |
Time recorder for in-hole motors |
Jun. 14, 1983 |
| 4299123 |
Sonic gas detector for rotary drilling system |
Nov. 10, 1981 |
| 4297880 |
Downhole pressure measurements of drilling mud |
Nov. 3, 1981 |
| 4274283 |
Apparatus and method for measuring fluid gel strength |
Jun. 23, 1981 |
| 4138887 |
Drilling mud level monitor and alarm |
Feb. 13, 1979 |
| 4043193 |
Method and apparatus for measuring volume and density of fluids in a drilling fluid system |
Aug. 23, 1977 |
| 3968844 |
Determining the extent of entry of fluids into a borehole during drilling |
Jul. 13, 1976 |
| 3955411 |
Method for measuring the vertical height and/or density of drilling fluid columns |
May. 11, 1976 |
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