Class 175/42 - Indicating agent released in drilling fluid

Subclass of Class 175 - Boring or penetrating the earth
Definition: Subject matter comprising a drilling fluid system and a
No. of patents: 30
Last issue date: 12/22/2009

Number	Title	Issue Date
7635033	Downhole abrading tool having taggants for indicating excessive wear A downhole abrading tools has a body with a first end for connection with a rotating component of a drill string, and a cutting end for rotation in unison with the body, the cutting end having an abrading matrix containing an abrasive material for rotating engagemen...	12/22/2009
7464771	Downhole abrading tool having taggants for indicating excessive wear A downhole abrading tools has a body with a first end for connection with a rotating component of a drill string, and a cutting end for rotation in unison with the body, the cutting end having an abrading matrix containing an abrasive material for rotating engagemen...	12/16/2008
7410011	Method to determine the concentration of deuterium oxide in a subterranean formation The extent of invasion of a water-based drilling fluid into a formation may be determined using at least two tracers where one is deuterium oxide and the other is a water-soluble tracer. One such method includes introducing a drilling fluid having an aqueous phase a...	08/12/2008
7210342	Method and apparatus for determining gas content of subsurface fluids for oil and gas exploration A process to analyze fluid entrained in well boreholes. The process includes gathering trap gas samples from return of drilling mud at multiple depths. The process also includes the steps of subjecting the samples to mass spectrometry in order to determine mass to c...	05/01/2007
7178590	Well fluids and methods of use in subterranean formations Improved well fluids that include hollow particles, and methods of using such improved well fluids in subterranean cementing operations are provided. Also provided are methods of cementing, methods of reducing annular pressure, and well fluid compositions. While the...	02/20/2007
7172028	Reciprocating slickline pump A reciprocating hydraulic slickline pump for use in a wellbore. The pump comprises a pump member. The pump member is reciprocated axially by slickline in order to form an upstroke and downstroke. The pump is configured such that it pressurizes fluid within a workstr...	02/06/2007
7152002	Method and apparatus for analysis of elements in bulk substance A substance analyzer utilizing Prompt Gamma Neutron Activation Analysis for identifying characteristics of a substance and method of manufacturing the same are disclosed. The analyzer is small enough to be portable and to allow its use in many applications where cur...	12/19/2006
7026950	Motor pulse controller The present invention provides a method and apparatus for generating one or more than one physically detectable physical influence changes to control or manipulate a down hole device. The present invention intercepts existing control signals to various controllers o...	04/11/2006
7009198	Pattern method and system for detecting foreign object debris using a fluorescent drilling lubricant A method of detecting a non-fixed object created during hole drilling operations on a system (12) includes applying a light emitting lubricant (25) to a drill bit (37) of a hole-drilling device (31). The light emitting lubricant adheres t...	03/07/2006
6908262	Systems and methods for driving large diameter caissons A system for driving a large diameter caisson into the ground, comprising a crane assembly, a plurality of vibratory devices, a clamp assembly, a suspension assembly, and a timing system. Each vibratory device generates a vibratory force. The clamp assembly rigidly ...	06/21/2005
6725926	Method of tracking fluids produced from various zones in subterranean wells Compositions and methods for determining the source of treatment fluids being produced from a production formation having multiple zones by introducing a treatment composition having a tracking material into a zone in the subterranean formation, and detecting the tr...	04/27/2004
6659175	Method for determining the extent of recovery of materials injected into oil wells during oil and gas exploration and production Disclosed is a method of determining the extent of recovery of materials injected into a oil well comprising the steps of: a) preparing a material to be injected into an oil well; b) admixing therewith a chemical tracer compound at a predetermined concent...	12/09/2003
6374668	Gas analyzer A gas analyzer for an oil drilling rig normally flows gas captured from a mud pit source through parallel paths from the gas source to a total gas analyzer. One of the paths is a loop path. Periodically the loop path is switched from the source to the tot...	04/23/2002
6125786	Underground warning system for underground conduits or pipes The invention provides a warning to the excavation above a pipe, conduit or cable laid underground by a service utility by the directional drilling method by providing a coloured area of drilling mud and/or soil about the pipe, conduit or cable. A colouri...	10/03/2000
5277263	Method for measuring formation fluids in drilling fluid In a well drilling operation (10), drilling fluid (70) is used to remove rock cuttings (68) and associated formation fluids released by the drill bit (84) and transport them to the surface. At the surface, a portion of these cuttings and fluids is extract...	01/11/1994
5140527	Method for the determination of the ionic content of drilling mud In the rotary drilling of oil wells a drilling mud is used both to transport the cuttings up to the surface and to impose an hydrostatic pressure on the walls of the borehole. For these functions the mud must for example have an acceptable viscosity and d...	08/18/1992
5027379	Method for identifying drilling mud filtrate invasion of a core sample from a subterranean formation A method of determining the invasion of drilling mud filtrate into a core sample from a borehole in a subterranean rock formation, comprising using a drilling mud which forms a filter cake during coring of the borehole thereby to limit invasion of drillin...	06/25/1991
4987960	Well fluid and test method A method of determining dilution of a well bore fluid, such as a drilling fluid, comprising preparing a drilling fluid having a known concentration of bromide ion, using the drilling fluid, recovering a sample of the used drilling fluid, determining quant...	01/29/1991
4904603	Monitoring drilling mud The invention in one aspect provides a method of testing drilling mud in use which comprises periodically sampling the circulating mud and analyzing its aqueous filtrate at the rig site by ion chromatography for selected positive and negative ions; one or...	02/27/1990
4807469	Monitoring drilling mud circulation For monitoring drilling mud circulation there is incorporated in the supply mud a known amount or concentration of at least one tracer ion which is substantially non-interactive with the other mud components and with the strata drilled, and the return or ...	02/28/1989
4787990	Low toxicity oil-based drilling fluid Disclosed is a low toxicity oil for use in drilling fluids. The oil consists essentially of branched- and cyclic-paraffins having 11 to 17 carbon atoms per molecule and further having a low aromatic content of less than about 1% and a low normal-paraffin ...	11/29/1988
4708212	Method and apparatus for optimizing determination of the originating depth of borehole cuttings Lag-determining method and apparatus which provides for determination of and an indication of when borehole cuttings from preselected depths arrive at the surface of the earth is disclosed and includes devices for inputting the value of the lag strokes an...	11/24/1987
4635735	Method and apparatus for the continuous analysis of drilling mud An oil well drilling rig (10) recirculates drilling mud which is analyzed continuously by pumping it through a gas separation unit (72) where the gases in the mud become separated and mixed with a carrier gas and are conveyed to gas analyzing devices (196...	01/13/1987
4630243	Apparatus and method for logging wells while drilling Measurement while drilling apparatus for detecting and communicating information relative to downhole parameters and/or characteristics of the earth strata via an electrically conductive drill string composed of a plurality of lengths of metallic pipe con...	12/16/1986
4495803	Method of monitoring the growth of cuttings beds in angled well bores A method for monitoring efficacy of removal of cuttings generated during drilling of a well is disclosed which features injection of artificial cuttings into the well-drilling fluid at a controlled rate and monitoring the rate of return of the artificial ...	01/29/1985
4447340	Method of tracing a well drilling mud In a method of tracing a well drilling mud by determining the concentration of a tracer ion in samples of filtrate from a drilling mud which contains a predetermined concentration of the tracer ion, the improvement wherein the tracer ion is the acetate io...	05/08/1984
4401169	System for lagtime measurement during drilling A drop device, method and article of manufacture used in measuring lagtime in the drilling of a well. A unique container with calcium carbide is inserted upwardly by its guide end into the open end of a pin connection prior to its threaded assembly into a...	08/30/1983
4352674	Method of tracing a well drilling mud In a method of tracing a well drilling mud by determining the concentration of a tracer ion in samples of filtrate from a drilling mud which contains a predetermined concentration of the tracer ion, the improvement wherein the tracer ion is the acetate io...	10/05/1982
4312414	Method and apparatus for obtaining saturation data from subterranean formations An apparatus (10) and method for obtaining oil and water saturation data from subterranean formations includes a drill bit (12) for boring a well core (26) containing the fluids. A core-catcher bowl (18) guides the well core (26) in the apparatus (10). An...	01/26/1982
4290498	Ablatible drill There is disclosed an ablatible drill comprising a soft or frangible matrix having embedded therein a multiplicity of hard inclusions which act as cutting teeth. During drilling, the matrix gradually wears away so that worn inclusions are circulated out o...	09/22/1981

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Class 175/42 - Indicating agent released in drilling fluid