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| Number | Title | Issue Date |
| 7392845 | Method of treating oil or gas well with biodegradable emulsion A biodegradable water-in-synthetic oil base emulsion, effective in the removal of filter cakes, consists of an external phase of a surfactant emulsified in a paraffinic base oil. The emulsion is particularly effective in breaking-down the interfacial rheological pro... | 07/01/2008 |
| 7392844 | Method of treating an oil or gas well with biodegradable low toxicity fluid system A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a fatty acid ester, such as methyl soyate. The fluid system may further contain a lactic acid ester, such as ethyl lactate, and/or a nonionic surfactant. Th... | 07/01/2008 |
| 7267183 | Drill bit lubricant with enhanced load carrying/anti wear properties A high-temperature lubricant is shown and described. The lubricant includes a base stock and about 1 to about 20 weight percent zirconium 2-ethylhexanoate. The lubricant may also include about 1 to about 9 weight percent bismuth 2-ethylhexanoate. ... | 09/11/2007 |
| 7231976 | Method of treating an oil or gas well with biodegradable low toxicity fluid system A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a blend of lactic acid ester, such as ethyl lactate, and a fatty acid ester, such as methyl soyate. The fluid system may be further in the form of a microem... | 06/19/2007 |
| 7071150 | Biodegradable lubricating composition and uses thereof, in particular in a bore fluid The invention concerns a biodegradable lubricating composition, based on mineral hydrocarbon oil and ester, comprising a majority amount of a mineral hydrocarbon fraction substantially free of aromatic compounds, said fraction having a normal paraffin content not mo... | 07/04/2006 |
| 6857485 | Shale hydration inhibition agent and method of use A water-base drilling fluid for use in drilling wells through a formation containing a shale which swells in the presence of water. The drilling fluid preferably includes: an aqueous based continuous phase, a weight material, and a shale hydration inhibition agent h... | 02/22/2005 |
| 6620769 | Environmentally acceptable fluid polymer suspension for oil field services This invention provides a water-free oil based fluid polymer suspension composition for use as a rheology modifier and fluid loss reducer in oil or gas well servicing fluids. It has been found that by using white medicinal oil as a carrier, high solids co... | 09/16/2003 |
| 6514915 | Synthetic base fluid for enhancing the results of crude oil characterization analyses Blends of synthetic olefins for use as the continuous phase of fluids selected from the group consisting of drilling, drill-in, and completion fluids. The blends meet EPA discharge requirements while also permitting investigators to clearly discern the pr... | 02/04/2003 |
| 6484821 | Shale hydration inhibition agent and method of use A water-base drilling fluid for use in drilling wells through a formation containing a shale which swells in the presence of water. The drilling fluid preferably includes: an aqueous based continuous phase, a weight material, and a shale hydration inhibit... | 11/26/2002 |
| 6455474 | High performance environmentally friendly, low temperature, drilling fluids Discloses environmentally friendly, low temperature base oils and drilling fluids. The drilling fluid is constituted of one or more of weighting agents, emulsifiers, wetting agents, viscosifiers, fluid loss control agents, proppants, and other particulate... | 09/24/2002 |
| 6422325 | Method for reducing borehole erosion in shale formations A method is disclosed that provides a stable invert emulsion for an oil-based drilling fluid with an environmentally friendly additive that effectively eliminates shale hydration and consequent borehole erosion. The additive is preferably potassium format... | 07/23/2002 |
| 6419016 | Methods of cementing in subterranean zones Improved methods of cementing in subterranean zones penetrated by well bores are provided. The methods are basically comprised of the steps of preparing a cement composition comprised of a hydraulic cement, a biodegradable, substantially non-dispersing se... | 07/16/2002 |
| 6323157 | Base oil for well fluids having low pour point temperature Disclosed are compositions having utility as well fluid base oils. The base oils are comprised of a mixture of internal predominantly linear tetradecene (C14) isomers and internal predominantly linear hexadecene (C16) isomers. The base oils of this invent... | 11/27/2001 |
| 6255256 | Non-toxic, inexpensive synthetic drilling fluid A non-toxic, inexpensive synthetic fluid for use in wellbore fluids (e.g., drilling fluids) is selected from the group consisting of (A) fluids having (I) a pour point greater than about -30° C. (-22° F.) and (II) a cetane index greater than 50, and com... | 07/03/2001 |
| 6247543 | Shale hydration inhibition agent and method of use A water-base drilling fluid for use in drilling wells through a formation containing a shale which swells in the presence of water. The drilling fluid preferably includes: an aqueous based continuous phase, a weight material, and a shale hydration inhibit... | 06/19/2001 |
| 6159907 | Method for treating a well employing a non-toxic, inexpensive fluid A non-toxic, inexpensive synthetic fluid for use in wellbore fluids (e.g., drilling fluids) is selected from the group consisting of (A) fluids having (I) a pour point greater than about -30° C. (-22° F.) and (II) a cetane index greater than 50, and com... | 12/12/2000 |
| 6110874 | Non-toxic, inexpensive synthetic drilling fluid A non-toxic, inexpensive synthetic fluid for use in wellbore fluids (e.g., drilling fluids) is selected from the group consisting of (A) fluids having (I) a pour point greater than about -30° C. (-22° F.) and (II) a cetane index greater than 50, and com... | 08/29/2000 |
| 6107255 | Non-toxic inexpensive synthetic drilling fluid A non-toxic, inexpensive synthetic fluid for use in wellbore fluids (e.g., drilling fluids) is selected from the group consisting of (A) fluids having (I) a pour point greater than about -30° C. (-22° F.) and (II) a cetane index greater than 50, and com... | 08/22/2000 |
| 6057272 | Drilling fluids comprising mostly linear olefins The present invention relates to synthetic hydrocarbon as the continuous phase of a drilling fluid. These hydrocarbons comprise mostly linear olefins, preferably C14 to C18 olefins.... | 05/02/2000 |
| 6054416 | Drilling fluids comprising biodegradable heteropolyglycols A fluid selected form the group consisting of a drilling, a drill-in, and a completion fluid, said fluid comprising a substantially linear heteropolyglycol in an amount effective to perform a function selected from the group consisting of polymer stabiliz... | 04/25/2000 |
| 6034037 | Non-toxic inexpensive synthetic drilling fluid A non-toxic, inexpensive synthetic fluid for use in wellbore fluids (e.g., drilling fluids) is selected from the group consisting of (A) fluids having (I) a pour point greater than about -30° C. (-22° F.) and (II) a cetane index greater than 50, and com... | 03/07/2000 |
| 6001280 | Oil-soluble tracer solutions containing gadolinium compounds A tracer solution suitable for use in measuring flow velocities in a borehole, includes: a) a gadolinium salt of a carboxylic acid of general formula ##STR1## where R is an alkyl of not less than four carbon atoms, typically C4 or C5 alkyl, and ... | 12/14/1999 |
| 5958845 | Non-toxic, inexpensive synthetic drilling fluid A non-toxic, inexpensive synthetic fluid for use in wellbore fluids (e.g., drilling fluids) is selected from the group consisting of (A) fluids having (I) a pour point greater than about -30° C. (-22° F.) and (II) a cetane index greater than 50, and com... | 09/28/1999 |
| 5891832 | Drilling fluid additive containing a fish oil/glycol mixture and related methods A drilling fluid additive for use during drilling and excavating applications, the additive comprises a mixture of an oil, an ester alcohol, nonionic surfactant and polypropylene glycol; and a method for manufacturing a drilling fluid additive comprising ... | 04/06/1999 |
| 5869434 | Free-flowing borehole servicing preparations containing linear -olefins, more patricularly corresponding drilling fluids The invention relates to the use of at least predominantly linear hydrocarbon compounds olefinically unsaturated in the alpha-position with flashpoints of at least about 80° as the oil phase or as part of the oil phase of oil- or water-based free-flowing... | 02/09/1999 |
| 5869433 | Non-fluorescing oil-based drilling fluid The present invention relates to an oil-based drilling fluid, a continuous phase for an oil-based drilling fluid, and additives for an oil-based drilling fluid. The drilling fluid, the continuous phase of the drilling fluid, and the additives for the oil-... | 02/09/1999 |
| 5851958 | Olefins and lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids The present invention provides drilling fluid additives for water-based drilling muds comprising olefins having the following general structure: Cn H2[(n-x)+1] wherein n is between about 8-30; x is the number of carbon-carbon double bonds... | 12/22/1998 |
| 5846913 | Invert biodegradable n-alkane(s) wellbore fluid containing less than 10 percent by weight of cycloparaffing isoparaffing and aromatic compounds, and method of drilling with such fluid The invention concerns wellbore fluids suitable for use in the oil and gas exploration and production industries and embraces fluids used for drilling, completion, workover or packing of wellbores. The invention is especially concerned with biodegradable ... | 12/08/1998 |
| 5837655 | Purified paraffins as lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids The present invention provides non-toxic, biodegradable purified paraffins which may be used as lubricants, rate of penetration enhancers, and/or spotting fluids for water-based drilling muds. When used as a spotting fluid additive, the paraffin isomers p... | 11/17/1998 |
| 5759963 | Use of acetals Acetals are used as a mineral oil substitute, oil component or base oil in invert-emulsion drilling muds, emulsion drilling muds, engine oils, gearbox oils, lubricating oils and also metal-working fluids, coolants, cooling lubricants and hydraulic fluids.... | 06/02/1998 |
| 5741759 | Skeletally isomerized linear olefins The present invention relates to synthetic hydrocarbons produced by skeletal isomerization, and the isomerization process. The products are especially useful as the continuous phase of a drilling fluid, for example when prepared from C14 to C | 04/21/1998 |
| 5711900 | Gadolinium compounds for use as oil-soluble tracers A tracer solution suitable for use in measuring flow velocities in a borehole, includes: a) a gadolinium salt of a carboxylic acid of general formula ##STR1## where R is an alkyl of not less than four carbon atoms, typically C4 or C5 alkyl, and ... | 01/27/1998 |
| 5589442 | Drilling fluids comprising mostly linear olefins The present invention relates to synthetic hydrocarbon as the continuous phase of a drilling fluid. These hydrocarbons comprise mostly linear olefins, preferably C14 to C18 olefins.... | 12/31/1996 |
| 5569642 | Synthetic paraffinic hydrocarbon drilling fluid An environmentally friendly invert drilling fluid comprises a water-in-oil emulsion which includes (a) at least 50 volume percent of a low toxicity base oil, and (b) at least one additive selected from the group consisting of emulsifiers, viscosifiers, we... | 10/29/1996 |
| 5547925 | Low toxicity terpene drilling fluid and drilling fluid additive A water based drilling fluid comprises 1-8% of an additive comprising saturated terpene, a mixture of saturated terpenes or a mixture of saturated and unsaturated terpenes. The drilling fluid is substantially non-toxic and has an LC-50 greater than 30,000... | 08/20/1996 |
| 5508258 | Use of surface-active alpha-sulfo-fatty acid di-salts in water and oil based drilling fluids and other drill-hole treatment agents Described is the use of surface-active alpha-sulfofatty acid di-salts as ecologically compatible emulsifiers of the W/O type and O/W type, respectively, in fluid and pumpable drilling fluids and other fluid drilling-hole treatment agents which comprise a ... | 04/16/1996 |
| 5498596 | Non toxic, biodegradable well fluids Well fluids such as drilling muds, especially useful in offshore drilling, are formulated with a hydrocarbon oil blend of a low viscosity poly alpha-olefin (PAO) such as a low molecular weight oligomer of decene together with a C10 to C18 | 03/12/1996 |
| 5352383 | Corrosion inhibitor and sealable thread protector end cap for tubular goods A liquid anticorrosion composition adapted for application to ferrous tubular goods is provided comprising an aqueous solution of cyclohexylammonium benzoate and a benzoate salt, which is preferably prepared by reacting cyclohexylamine with excess sodium ... | 10/04/1994 |
| 5344817 | Downhole drilling spotting fluid composition and method An aqueous-based composition comprising a glycerophosphoric acid ester and a diacetyltartaric acid ester of mono and/or diglycerides when combined with viscosifier, sealant and weighting agent is suitable for use as a spotting fluid for downhole drilling ... | 09/06/1994 |
| 5189012 | Oil based synthetic hydrocarbon drilling fluid The present invention relates to an improved continuous phase for an oil based drilling fluid and specifically a synthetic hydrocarbon continuous phase which is non-polluting and minimally toxic. The invention provides excellent drilling fluid properties ... | 02/23/1993 |
