Patent application number | Description | Published |
20090016810 | LINEAR GUIDE - A linear guide, in particular for a device for electrochemical metal machining, that guides a linear movement of a quill that is moved periodically in a machine frame in order to periodically modify a working gap between a cathode situated on the quill and a workpiece in the direction of the longitudinal axis of the quill, the quill being connected to the machine frame by a plurality of connecting rods, the connecting rods being situated, in the no-load, non-deflected state, essentially parallel to the longitudinal axis of the quill , and the connecting rods having at the point of connection to the quill, as well as at the point of connection to the machine frame, a notch hinge in order to enable, via the hinge, the periodic linear movement of the quill, and the flexibilities of these notch hinges being based on elasticities in their structures formed by targeted thinning of the material. | 01-15-2009 |
20140069809 | MACHINE FOR ELECTROCHEMICAL METAL MACHINING - The invention relates to a machine for electrochemical metal machining, wherein metal is removed by electrolytic dissolution of the workpiece ( | 03-13-2014 |
Patent application number | Description | Published |
20120160516 | System and Method for Positioning a Bottom Hole Assembly in a Horizontal Well - A system of couplings and method of use of the couplings to locate a downhole tool connected to coiled tubing, such as a bottom hole assembly, within a selected segment of a casing string. The selected segment of casing may be a ported collar or ported housing that permits the treatment and/or stimulation of the adjacent well formation. The system of couplings may be two, three, or four couplings that are spaced apart at predetermined lengths. The predetermined lengths may be shorter than typical lengths of casing segments. The distance between the first and second coupling may be substantially identical to the distance between the third and fourth coupling. The use of distances between the couplings that are shorter than the length of conventional casing segments may provide surface indicators as to the location of the bottom hole assembly with a higher confidence than relying on a traditional tally sheet. | 06-28-2012 |
20130248181 | Downhole Isolation and Depressurization Tool - A depressurization tool is described for use downhole in depressurizing an isolated zone. A decompression chamber containing a compressible fluid volume is described. The opening of the chamber is sealed with a closure that is configured to open upon application of a pressure differential across the opening. When used downhole within an isolated and nonpermeable wellbore zone, excessive ambient pressure will cause the closure to open and allow the chamber to fill with fluid at increased pressure, depressurizing the wellbore zone. The tool is useful in wellbore completion systems that include sliding sleeves. | 09-26-2013 |
20150075809 | DOWNHOLE ISOLATION AND DEPRESSURIZATION TOOL - A depressurization tool is described for use downhole in depressurizing an isolated zone. A decompression chamber containing a compressible fluid volume is described. The opening of the chamber is sealed with a closure that is configured to open upon application of a pressure differential across the opening. When used downhole within an isolated and nonpermeable wellbore zone, excessive ambient pressure will cause the closure to open and allow the chamber to fill with fluid at increased pressure, depressurizing the wellbore zone. The tool is useful in wellbore completion systems that include sliding sleeves. | 03-19-2015 |
Patent application number | Description | Published |
20110155377 | JOINT OR COUPLING DEVICE INCORPORATING A MECHANICALLY-INDUCED WEAK POINT AND METHOD OF USE - A system and method using liner joints, pup joints, couplings, or similar components incorporating a mechanically-induced weak point to access targeted subterranean rock formations. More particularly, the mechanically-induced weak point may comprise a machined weakness, blow-out plug, burst disc, soluble plug, or the like. The mechanically-induced weak point may be adapted to burst at a predetermined blow-out pressure differential. Alternatively, the soluble plug may be manufactured of soluble material adapted to selectively dissolve in certain solutions. | 06-30-2011 |
20110174491 | BOTTOM HOLE ASSEMBLY WITH PORTED COMPLETION AND METHODS OF FRACTURING THEREWITH - A ported completion and method for use in fracturing multi-zone wells. A casing assembly having a plurality of casing lengths and one or more collars positioned so as to couple together the casing lengths. The collars may be a tubular body having an inner flow path, one or more fracture ports configured to provide fluid communication between an outer surface of the collar and the inner flow path, one or more valve holes intersecting the fracture ports, one or more valve vent holes positioned to provide fluid communication between the valve holes and the inner flow path, and one or more valves positioned in the valve holes for opening and closing the fracture ports. The valves are configured to open when a pressure differential is created between the fracture ports and the valve vent holes. The valve vent hole may be an annulus around the perimeter of the tubular body. | 07-21-2011 |
Patent application number | Description | Published |
20090289214 | MAGNETORHEOLOGICAL FORMULATION - Magnetorheological formulations, processes for preparing the same and uses therefor, the formulations comprising: (a) an ionic liquid comprising anions and cations, and (b) dispersed magnetizable particles having a mean diameter of 0.1 to 500 μm; wherein the ionic liquid comprises one or more salts selected from the group consisting of 1-butyl-3-methyl-imidazolium methylsulfate, 1-ethyl-3-methylimidazolium ethylsulfate, 1-ethyl-3-methyl-imidazolium thiocyanate, 1-butyl-3-methylimidazolium thiocyanate, 1-ethyl-3-methyl-imidazolium acetate, 1-butyl-3-methylimidazolium acetate, 1-ethyl-3-methylpyridinium ethylsulfate, 1-ethyl-3-methylimidazolium dicyanamide, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-hexyl-3-methylimidazolium tetrafluoroborate, 1-methyl-3-octylimidazolium tetrafluoroborate, 1-methyl-3-octylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-hexyl-3-methylimidazolium hexafluorophosphate, methyltrioctylammonium bis(trifluoromethylsulfonyl)imide, 1-ethyl-3-methylimidazolium 2-(2-methoxyethoxy)ethylsulfate and mixtures thereof. | 11-26-2009 |
20100078586 | MAGNETORHEOLOGICAL LIQUID - A magnetorheological formulation which comprises at least one base oil, at least one magnetizable particle, a at least one dispersant and a at least one thixotropic agent is described. | 04-01-2010 |
20100238760 | CONSTANT LOAD SHEAR CELL FOR MAGNETORHEOLOGICAL FLUIDS - The invention relates to a constant load shear cell and a method for constant loading of a magnetorheological fluid in a constant load shear cell. The constant load shear cell comprises a rotatable shaft ( | 09-23-2010 |
20100307601 | METHOD AND DEVICE FOR CONDITIONING A SUSPENSION CONTAINING MAGNETIZABLE PARTICLES - Methods comprising: providing a suspension comprising magnetizable particles; and delivering the suspension through a gap ( | 12-09-2010 |
20110030454 | RHEOMETER - The invention relates to a rheometer having a rotatable shaft ( | 02-10-2011 |
20110120207 | METHOD AND DEVICE FOR CHARACTERIZING MAGNETORHEOLOGICAL FLUIDS - A method for characterizing magnetorheological fluids using a volume flow rate measurement. The volume flow of the magnetorheological fluid through a capillary is initially measured, with a constant weight force being applied onto the magnetorheological fluid. A magnetic field is then applied to the capillary, and the volume flow of the magnetorheological fluid through the capillary is measured with the magnetic field applied, with a second constant weight force being applied onto the magnetorheological fluid. A device for carrying out the method comprises a container for storing a magnetorheological fluid, wherein the container is connected on one side to a capillary through which the magnetorheological fluid can flow, and is closed on a different side by a movable piston, which presses the magnetorheological fluid through the capillary with a constant weight force, and means for generating a magnetic field are provided in the region of the capillary. | 05-26-2011 |