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Class Information
Number: 166/250.01
Name: Wells > Processes > With indicating, testing, measuring or locating
Description: Process including a step of: providing evidence of a condition; e.g., leak, oil-gas interface; performing an analysis; e.g., downhole pressure; counting; or determining the position of an object or formation.

Sub-classes under this class:

Class Number	Class Name	Patents
166/250.15	Automatic control for production	198
166/250.07	Bottom hole pressure	120
166/250.03	Determining fluid interface or fluid level	62
166/254.1	Determining position of earth zone or marker	49
166/255.1	Determining position of object in well	105
166/250.13	Determining stuck point	10
166/250.1	Fracturing characteristic	136
166/250.11	Holder for coupon or sensor	57
166/250.09	Impression means	25
166/251.1	Including in situ combustion	53
166/252.1	Including production of earth fluid by driving fluid	78
166/250.17	Including testing or treating tool having at least one actuatable packer	118
166/253.1	Indicating the location, presence, or absence of cement	36
166/250.08	Leak testing or locating	61
166/250.14	Of cementing or plugging technique	62
166/250.02	Permeability determining	58
166/250.04	Plug indicating or releasing	12
166/250.16	Prospecting	39
166/250.05	Scale or corrosion determination	17
166/250.06	Steam quality	7
166/250.12	Tracer	47

Patents under this class:

1 2 3 4 5 6 7 8 9 10 11

Patent Number	Title Of Patent	Date Issued
6357524	System for using inert gas in oil recovery operations	Mar. 19, 2002
6359569	Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation	Mar. 19, 2002
6343649	Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation	Feb. 5, 2002
6334489	Determining subsurface fluid properties using a downhole device	Jan. 1, 2002
6330913	Method and apparatus for testing a well	Dec. 18, 2001
6325161	Method and apparatus for installing electronic equipment below soft earth surface layer	Dec. 4, 2001
6321838	Apparatus and methods for acoustic signaling in subterranean wells	Nov. 27, 2001
6305469	Method of creating a wellbore	Oct. 23, 2001
6302203	Apparatus and method for communicating with devices positioned outside a liner in a wellbore	Oct. 16, 2001
6276466	System for measuring the direction and revolution of a production string	Aug. 21, 2001
6272916	Acoustic wave transmission system and method for transmitting an acoustic wave to a drilling metal tubular member	Aug. 14, 2001
6244375	Systems and methods for performing real time seismic surveys	Jun. 12, 2001
6244338	System for improving coalbed gas production	Jun. 12, 2001
6241020	Method of recording a cross-load on a mobile repair unit for a well	Jun. 5, 2001
6234257	Deployable sensor apparatus and method	May. 22, 2001
6230800	Methods and apparatus for long term monitoring of a hydrocarbon reservoir	May. 15, 2001
6227310	Method and apparatus for providing a magnetic direction reference	May. 8, 2001
6223821	Inflatable packer inflation verification system	May. 1, 2001
6216782	Apparatus and method for verification of monophasic samples	Apr. 17, 2001
6216533	Apparatus for measuring downhole drilling efficiency parameters	Apr. 17, 2001
6213207	Method of distinguishing between installing different sucker rods	Apr. 10, 2001
6209639	Method of ensuring that well tubing was properly stretched	Apr. 3, 2001
6209651	Well production apparatus and method	Apr. 3, 2001
6199634	Method and apparatus for controlling the permeability of mineral bearing earth formations	Mar. 13, 2001
6189621	Smart shuttles to complete oil and gas wells	Feb. 20, 2001
6170573	Freely moving oil field assembly for data gathering and or producing an oil well	Jan. 9, 2001
6167964	Method of determining in-situ stresses	Jan. 2, 2001
6151961	Downhole depth correlation	Nov. 28, 2000
6148664	Method and apparatus for shutting in a well while leaving drill stem in the borehole	Nov. 21, 2000
6142228	Downhole motor speed measurement method	Nov. 7, 2000
6138752	Method and apparatus to determine subterrranean formation stress	Oct. 31, 2000
6138753	Technique for treating hydrocarbon wells	Oct. 31, 2000
6131658	Method for permanent emplacement of sensors inside casing	Oct. 17, 2000
6128949	Phase change analysis in logging method	Oct. 10, 2000
6125933	Formation fracturing and gravel packing tool	Oct. 3, 2000
6116085	Instrumentation tubing string assembly for use in wellbores	Sep. 12, 2000
6105690	Method and apparatus for communicating with devices downhole in a well especially adapted for use as a bottom hole mud flow sensor	Aug. 22, 2000
6102122	Control of heat injection based on temperature and in-situ stress measurement	Aug. 15, 2000
6092598	Method and apparatus for measuring operating parameters of a submergible pumping system	Jul. 25, 2000
6065538	Method of obtaining improved geophysical information about earth formations	May. 23, 2000
6061000	Downhole data transmission	May. 9, 2000
6050131	Method for verifying positive inflation of an inflatable element	Apr. 18, 2000
6041860	Apparatus and method for performing imaging and downhole operations at a work site in wellbores	Mar. 28, 2000
6041861	Method to determine self-calibrated circumferential cased bond impedance	Mar. 28, 2000
6026900	Multiple liner method for borehole access	Feb. 22, 2000
6026911	Downhole tools using artificial intelligence based control	Feb. 22, 2000
6006833	Method for creating leak-tested perforating gun assemblies	Dec. 28, 1999
6006832	Method and system for monitoring and controlling production and injection wells having permanent downhole formation evaluation sensors	Dec. 28, 1999
6006831	Electrical well logging fluid and method of using same	Dec. 28, 1999
6000470	Self-locking connector	Dec. 14, 1999