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Class Information
Number: 73/152.26
Name: Measuring and testing > Borehole or drilling (e.g., drill loading factor, drilling rate, rate of fluid flow) > Fluid flow measuring or fluid analysis > With sampling > From formation wall > With sealing detail
Description: Subject matter including means between a sample induction means and the formation wall which prevents the contamination of formation samples with borehole fluids and wherein significance is attributed to the contamination prevention means.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7584655 |
Formation tester tool seal pad |
Sep. 8, 2009 |
| 7584786 |
Apparatus and method for formation evaluation |
Sep. 8, 2009 |
| 7469746 |
Downhole sampling tool and method for using same |
Dec. 30, 2008 |
| 7458419 |
Apparatus and method for formation evaluation |
Dec. 2, 2008 |
| 7395879 |
MWD formation tester |
Jul. 8, 2008 |
| 7347262 |
Downhole sampling tool and method for using same |
Mar. 25, 2008 |
| 7207216 |
Hydraulic and mechanical noise isolation for improved formation testing |
Apr. 24, 2007 |
| 7204309 |
MWD formation tester |
Apr. 17, 2007 |
| 7178591 |
Apparatus and method for formation evaluation |
Feb. 20, 2007 |
| 7155990 |
Method and apparatus for determining a downhole fluid sample volume |
Jan. 2, 2007 |
| 7152466 |
Methods and apparatus for rapidly measuring pressure in earth formations |
Dec. 26, 2006 |
| 7128144 |
Formation testing and sampling apparatus and methods |
Oct. 31, 2006 |
| 7114385 |
Apparatus and method for drawing fluid into a downhole tool |
Oct. 3, 2006 |
| 7000697 |
Downhole measurement apparatus and technique |
Feb. 21, 2006 |
| 6956204 |
Determining fluid properties from fluid analyzer |
Oct. 18, 2005 |
| 6877559 |
Retrieving a sample of formation fluid in as cased hole |
Apr. 12, 2005 |
| 6786086 |
Determining the in situ effective mobility and the effective permeabilty of a formation |
Sep. 7, 2004 |
| 6769296 |
Apparatus and method for measuring formation pressure using a nozzle |
Aug. 3, 2004 |
| 6745835 |
Method and apparatus for pressure controlled downhole sampling |
Jun. 8, 2004 |
| 6658930 |
Metal pad for downhole formation testing |
Dec. 9, 2003 |
| 6655457 |
Method for use in sampling and/or measuring in reservoir fluid |
Dec. 2, 2003 |
| 6530428 |
Method and apparatus for in-situ production well testing |
Mar. 11, 2003 |
| 6386545 |
Fluid plug |
May. 14, 2002 |
| 6098020 |
Downhole monitoring method and device |
Aug. 1, 2000 |
| 5803186 |
Formation isolation and testing apparatus and method |
Sep. 8, 1998 |
| 5692565 |
Apparatus and method for sampling an earth formation through a cased borehole |
Dec. 2, 1997 |
| 5644076 |
Wireline formation tester supercharge correction method |
Jul. 1, 1997 |
| 5641642 |
In situ biofilm coupon device |
Jun. 24, 1997 |
| 5337822 |
Well fluid sampling tool |
Aug. 16, 1994 |
| 5293931 |
Modular, multi-level groundwater sampler |
Mar. 15, 1994 |
| 5293934 |
Ground water sampling unit having a fluid-operated seal |
Mar. 15, 1994 |
| 5184508 |
Method for determining formation pressure |
Feb. 9, 1993 |
| 5056595 |
Wireline formation test tool with jet perforator for positively establishing fluidic communication with subsurface formation to be tested |
Oct. 15, 1991 |
| 4936139 |
Down hole method for determination of formation properties |
Jun. 26, 1990 |
| 4879900 |
Hydraulic system in formation test tools having a hydraulic pad pressure priority system and high speed extension of the setting pistons |
Nov. 14, 1989 |
| 4860580 |
Formation testing apparatus and method |
Aug. 29, 1989 |
| 4860581 |
Down hole tool for determination of formation properties |
Aug. 29, 1989 |
| 4845982 |
Hydraulic circuit for use in wireline formation tester |
Jul. 11, 1989 |
| 4745802 |
Formation testing tool and method of obtaining post-test drawdown and pressure readings |
May. 24, 1988 |
| 4720996 |
Power control system for subsurface formation testing apparatus |
Jan. 26, 1988 |
| 4676096 |
Downhole resettable formation sampling tool |
Jun. 30, 1987 |
| 4593560 |
Push-off pistons |
Jun. 10, 1986 |
| 4507957 |
Apparatus for testing earth formations |
Apr. 2, 1985 |
| 4416152 |
Formation fluid testing and sampling apparatus |
Nov. 22, 1983 |
| 4369654 |
Selective earth formation testing through well casing |
Jan. 25, 1983 |
| 4339948 |
Well formation test-treat-test apparatus and method |
Jul. 20, 1982 |
| 4292842 |
Tool for testing earth formations in boreholes |
Oct. 6, 1981 |
| 4270385 |
Tool for testing earth formations in boreholes |
Jun. 2, 1981 |
| 4248081 |
Tool for testing earth formations in boreholes |
Feb. 3, 1981 |
| 4246782 |
Tool for testing earth formations in boreholes |
Jan. 27, 1981 |
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