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| Number | Title | Issue Date |
| 7211549 | Spotting fluid for use with oil-based muds and method of use A method for releasing a stuck drill string in the borehole of an underground formation employing an non-aqueous drilling fluid, the illustrative method including contacting the stuck drill string with a non-emulsion based, homogeneous additive composition effective... | 05/01/2007 |
| 6984611 | Spotting fluid for differential sticking A new composition for a spotting fluid and a method of using such spotting fluid for freeing differential stuck pipe in a subterranean well drilling operation is disclosed. The composition comprises an invert water-in-oil emulsion comprising iso-butyl oleate as its ... | 01/10/2006 |
| 6662871 | Spotting fluid for differential sticking A new composition for a spotting fluid and a method of using such spotting fluid for freeing differential stuck pipe in a subterranean well drilling operation is disclosed. The composition comprises an invert water-in-oil emulsion comprising iso-butyl ole... | 12/16/2003 |
| 6537951 | Fluid and method for releasing tubular elements stuck in a well The present invention relates to a well fluid for releasing tubular elements stuck in the well. The fluid comprises a part A consisting of one or more esters obtained by reaction of a linear or branched monocarboxylic acid (A.1) having between 8 and 24 ca... | 03/25/2003 |
| 6435276 | Spotting fluid for differential sticking A new composition for a spotting fluid and a method of using such spotting fluid for freeing differential stuck pipe in a subterranean well drilling operation is disclosed. The composition comprises an invert water-in-oil emulsion comprising iso-butyl ole... | 08/20/2002 |
| 6267186 | Spotting fluid and method of treating a stuck pipe The method for releasing the stuck pipe of the present invention uses a combination of components which oxidize the mud cake and generated gas bubbles to create an upward buoyancy for the oxidized mud cake. The spotting method of the present invention com... | 07/31/2001 |
| 6148917 | Method of releasing stuck pipe or tools and spotting fluids therefor Aphron-containing spotting fluids and their use in releasing pipe or tools stuck in the filter cake on the sides of a borehole are disclosed. The spotting fluids comprise a liquid, either aqueous, oleaginous, or mixtures thereof, a viscosifier which impar... | 11/21/2000 |
| 5715896 | Method and composition for reducing torque in downhole drilling The present invention relates to a method and a solution for use in downhole drilling to reduce the torque necessary to rotate the drill string. The solution comprises a phosphate and a sulfonate according to the formula (RSO3)x Me | 02/10/1998 |
| 5712228 | Silicone based fluids for drilling applications An essentially non-polluting, substantially non-toxic drilling fluid composition has been discovered that is particularly useful as a lubricant or spotting fluid in drilling oil and gas wells. The fluid comprises silicone which may be is mixed with an emu... | 01/27/1998 |
| 5671810 | Composition and method for relief of differential sticking during drilling A composition and method for use in freeing differentially stuck pipes is presented, comprising a hydrocarbon, acetic acid and a surfactant. The composition frees stock pipes quickly, thus reducing down-time during the process of drilling a subterranean w... | 09/30/1997 |
| 5652200 | Water based drilling fluid additive and methods of using fluids containing additives An additive for a water-based fluid which is to be used when the likelihood of differential sticking is high and which reduces the sticking tendency of the fluid and mud cake. An additive according to the invention comprises a well dispersed-particulate p... | 07/29/1997 |
| 5555937 | Method and combination of materials for releasing a stuck pipe A method and combination of materials for freeing stuck pipe involves first the spotting of a clear brine, preferably calcium chloride, calcium bromide or zinc bromide, or mixtures thereof, for a given period of time, preferably at least about 8 hours, in... | 09/17/1996 |
| 5415230 | Method and combination for materials for releasing a stuck pipe A method and combination of materials for freeing stuck pipe involves first the spotting of a clear brine, preferably calcium chloride, calcium bromide or zinc bromide, or mixtures thereof, for a given period of time, preferably at least about 8 hours, in... | 05/16/1995 |
| 5260268 | Methods of drilling well boreholes and compositions used therein The present invention relates to a method comprising the steps of introducing into a well borehole a composition, comprising water and an amount, sufficient to reduce drilling torque, prevent sticking or twisting of a pipe during drilling, or release a st... | 11/09/1993 |
| 5247992 | Fluid for releasing stuck drill pipe This invention discloses a method which utilizes an improved spotting fluid composition to release a stuck drill string in the bore hole of an underground formation employing an aqueous drilling fluid, the improved composition used in contacting the mud c... | 09/28/1993 |
| 5127475 | 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 ... | 07/07/1992 |
| 5045219 | Use of polyalphalolefin in downhole drilling The composition of matter and application thereof in the present invention relates to the application of a synthetic hydrocarbon compound, a polyalphaolefin liquid, blended in various concentrations with chemical oil and water emulsifiers, thinners and oi... | 09/03/1991 |
| 4964615 | Compositions for freeing jammed drill pipes Compositions free from mineral oil and used for freeing jammed drill pipes in drilling operations, and processes for using such compositions are disclosed. The compositions comprise a mixture of: (a) one or more fatty acid alkyl esters corresponding to the fol... | 10/23/1990 |
| 4876017 | Use of polyalphalolefin in downhole drilling Composition of matter in the present invention relates to the application of a synthetic hydrocarbon compound, such as a polyalphalolefin, which may be combined with emulsifiers and thinners (functional additives), at a ratio of approximately 9:1, to serv... | 10/24/1989 |
| 4614235 | Use of mono and polyalkylene glycol ethers as agents for the release of differentially stuck drill pipe A formulation suitable for preparation of a spotting pill effective in the release of stuck pipe in a borehole during a drilling operation which formulation contains a mono and/or poly alkylene glycol ether and viscosified sufficiently to make the formula... | 09/30/1986 |
| 4494610 | Method for releasing stuck drill pipe A method is revealed for releasing a stuck drill string in a borehole of an underground formation by application of an additive fluid comprising a lower carbon number alcohol and optionally a weighting material and/or diluent.... | 01/22/1985 |
| 4466486 | Method for releasing stuck drill pipe A method is revealed for releasing a stuck drill string in a borehole of an underground formation by application of an additive fluid comprising fresh water or brine and a polymer material.... | 08/21/1984 |
| 4464269 | Additive composition for release of stuck drill pipe An additive composition effective in the release of stuck pipe in a borehole during a drilling operation which composition contains propoxylated C18 -C32 alkanols, an oil-soluble emulsifier-wetting agent and a liquid hydrocarbon dilu... | 08/07/1984 |
| 4436638 | Additive composition for release of stuck drill pipe An additive composition effective in the release of stuck pipe in a borehole during a drilling operation which composition contains propoxylated C18 -C32 alkanols, an oil-soluble emulsifier-wetting agent and a liquid hydrocarbon dilu... | 03/13/1984 |
| 4427564 | Additive composition for release of stuck drill pipe An additive composition effective in the release of stuck pipe in a borehole during a drilling operation which composition contains a propoxylated lactone acid, e.g. a C8 -C22 alkyl lactone acids having from 10 to 13 propylene glycol... | 01/24/1984 |
| 4230587 | Additive composition for release of stuck drill pipe An additive composition effective in the release of stuck pipe in a bore hole during a drilling operation.... | 10/28/1980 |
