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| Number | Title | Issue Date |
| 7124820 | Exothermic tool and method for heating a low temperature metal alloy for repairing failure spots along a section of a tubular conduit An exothermic well tool and method of use for the repair of failure spots along a section of a first tubular conduit, such as casing, wherein the housing of the tool is heated to at least a temperature approximately in excess of that required to activate and melt an... | 10/24/2006 |
| 7059299 | Multi-stage sliding air throttle valve assembly and cylinder assembly engine including same A multi-stage air throttle valve assembly is provided for use in a multiple cylinder engine. The valve assembly provides a series of shiftable valve plates to provide full, maximum opening of air ports having passageways therethrough for introduction of air into the... | 06/13/2006 |
| 6767116 | Lighting fixture assembly A lighting fixture for mounting from a suspensory surface, such as a ceiling, wall, or the like, includes a counterweight for balancing or equalizing the weight in the fixture resulting from a ballast being positioned within the frame of the fixture. The weight of t... | 07/27/2004 |
| 6758668 | Preheating device for heavy wall pipe A preheating apparatus is disclosed which supports a hollow, cylindrical combustible heating element. A solid fuel mixture is used to generate hot gases for the heating of metal surfaces for pre-welding purposes. A grooveway is imbedded radially around the upper por... | 07/06/2004 |
| 5495892 | Inflatable packer device and method An inflatable packer and a method for its use are provided for introduction into a subterranean well bore on a conduit. A fold can form in the inflatable elastomeric bladder of the packer during inflation or deflation, forming a seal on the central body o... | 03/05/1996 |
| 5428651 | Nuclear reactor locking piston drive system and valve assembly A locking piston drive system and valve assembly is provided for shutdown of a nuclear reactor. "Chatter" in a check valve assembly which occurs during charging and/or re-charging of control fluid within a control line is eliminated by providing a valve h... | 06/27/1995 |
| 5417289 | Inflatable packer device including limited initial travel means and method An inflatable packer and a method for its use are provided for introduction into a subterranean well bore on a conduit. A pinch can form in the inflatable elastomeric bladder of the packer during inflation, forming a seal on the central body, which obstru... | 05/23/1995 |
| 5390748 | Method and apparatus for drilling optimum subterranean well boreholes A method and apparatus are provided for drilling a borehole through formations of the earth to a targeted position relative to the entrance of the borehole on the surface of the earth. At each measurement of the position and orientation of the downhole dr... | 02/21/1995 |
| 5327930 | Nuclear reactor locking piston drive system and valve assembly A locking piston drive system and valve assembly is provided for shutdown of a nuclear reactor. "Chatter" in a check valve assembly which occurs during charging and/or re-charging of control fluid within a control line is eliminated by providing a valve h... | 07/12/1994 |
| 5317954 | Pressure switch assembly The present invention provides a pressure switch assembly for monitoring a source of fluid pressure. In one embodiment, the pressure switch assembly senses a variation of fluid pressure for actuation of a micro-switch to open or close an electric circuit.... | 06/07/1994 |
| 4757838 | Fire hose reel An improved swivel fire hose reel is particularly suitable for use with fire safety equipment for industrial installations. A reel having a substantially vertical axis is pivotably mounted on a base, enabling the reel to rotate 360° and allow the hose to... | 07/19/1988 |
| 4754612 | Method for optimizing the mechanical output of a fluid pressure free piston engine A fluid pressure, free piston engine, such as a centrifugal piston expander, provides a cyclically varying torque to a rotatable output shaft. A unidirectional or overrunning rotational clutch comprising two relatively rotatable elements has one element s... | 07/05/1988 |
| 4755230 | Method of and composition for removing paraffin deposits from hydrocarbon transmission conduits A method is provided for removing paraffin deposits from the interior of a hydrocarbon transmission conduit, such as a subsea pipeline. The method comprises the steps of introducing into an isolated length of the conduit containing the paraffin a pre-dete... | 07/05/1988 |
| 4754812 | Dual string packer method and apparatus A packer, preferably utilized for dual string operations, comprising a plurality of axially stacked body elements including, from the bottom up, a hydraulic housing, a lower cone element, an annular slip cage containing radially expansible slip elements, ... | 07/05/1988 |
| 4754632 | Apparatus for bending structural metal rails The invention relates to an apparatus for bending structural metal rails, preferably rails for multi-glazed windows, and gives instructions for a bending unit (20) having two wringing heads (6) which can be displaced relative to the width of the rail, for... | 07/05/1988 |
| 4452583 | Liquid hydrocarbon burning method and apparatus An improved apparatus is provided for burning hydrocarbon-containing matter as a result of, for example, testing operations on a subterranean well wherein the hydrocarbon-containing matter is atomized and sprayed outwardly from a ring of nozzles whose axe... | 06/05/1984 |
| 4421170 | Method and apparatus for quick replacement of cartridge filters used in well fluid cleaning operations A cylindrical housing is adapted to receive and discharge fluid in a subterranean well. In a preferred form, a plate is positioned in the cylinder separating it into first and second chambers. Filter adapter receiving means are disposed across the plate, ... | 12/20/1983 |
| 4415038 | Formation protection valve apparatus and method A method and apparatus are provided for effecting the automatic closing of the bore of a subterranean well conduit upon the withdrawal of a tubular work string or production string from the conduit and the reopening of such bore upon the reinsertion of a ... | 11/15/1983 |
| 4402052 | Apparatus for making threaded joints incorporating a make-up speed controller An apparatus is provided for controlling the speed of rotation of a joint member during the operation of making a threaded joint. At lower speeds of rotation, a counter means receives clock pulses generated at a predetermined frequency and counts down fro... | 08/30/1983 |
| 4401158 | One trip multi-zone gravel packing apparatus An apparatus is provided for gravel packing a plurality of zones within a subterranean well. Primary sealing means are adapted for setting in casing at a position above the zones. A plurality of sets of production screens and valve means are provided, the... | 08/30/1983 |
| 4396911 | Multi-point level indicator system An apparatus for monitoring the level of material in a plurality of hoppers or bins includes a radiation source and sensor associated with each hopper. Each sensor generates an output signal representing the incidence of radiation passing through the mate... | 08/02/1983 |
| 4393931 | Combination hydraulically set hanger assembly with expansion joint The disclosure relates to an improved apparatus for effecting the cementing of a liner at the bottom of a well bore. The liner sleeve assembly is inserted into the well bore on a hanger which is detachably connected to a running tool, which, in turn is co... | 07/19/1983 |
| 4393485 | Apparatus for compiling and monitoring subterranean well-test data An apparatus for monitoring the testing of a subterranean well by acquiring data from the well includes means for monitoring transducers positioned downhole, at the wellhead, at a separator or at other locations to obtain the values for a predetermined se... | 07/12/1983 |
| 4388971 | Hanger and running tool apparatus and method A conduit gripping tool such as a packer or hanger is provided for use in subterranean wells, together with a running tool and a method for installing the gripping tool in the well. Threaded means are mounted on the running tool for axial movement. The ha... | 06/21/1983 |
| 4383578 | Casing bore receptacle with fluid check valve Apparatus for use in injecting treatment solutions through the annulus between two concentric conduits, such as tubing and casing, and then circulating it upwards with produced hydrocarbons. The apparatus comprises an integral valve and seal, including a ... | 05/17/1983 |
| 4374487 | Pilot with cantilevered spring A fluid actuated pilot assembly employing a cantilevered spring member which is mounted to apply a force to a sensing piston in opposition to the force applied by the sensed fluid pressure. Upon the occurrence of the pressure of the fluid being sensed exc... | 02/22/1983 |
| 4373584 | Single trip tubing hanger assembly An apparatus is provided for producing a well from at least one productive zone penetrated by the well bore in which casing is set below the top of the well. Tubing hanger means support at least one production tubing string extending downwardly in the wel... | 02/15/1983 |
| 4372400 | Apparatus for applying pressure to fluid seals An apparatus is provided for applying pressure to a fluid seal positioned between a reservoir of a first fluid, such as lubricating fluid, and a source of a second fluid under pressure, such as a drilling fluid in a downhole drilling apparatus. A piston i... | 02/08/1983 |
| 4372333 | Valve actuating apparatus and method A fluid pressure actuator is moved in one direction by fluid pressure and returned in the other direction by a compressed spring. With the method and apparatus embodied in the disclosure, a plurality of additional energy storage storing devices are compre... | 02/08/1983 |
| 4365402 | Method for counting turns when making threaded joints A method and apparatus are disclosed for making threaded joints, such as pipe joints, within a range of predetermined applied torque and turns values. A pipe or a pipe and a coupling are threaded onto the end of a pipe string. The applied torque is monito... | 12/28/1982 |
| 4359090 | Anchoring mechanism for well packer An anchoring mechanism for a well packer includes plural bidirectional one piece slip members which are radially extendable into gripping engagement with a well conduit. The slip members are engaged by wedge surfaces on cooperating upper and lower slip co... | 11/16/1982 |
| 4356867 | Temporary lock-open tool for subterranean well valve A method and an apparatus for setting the temporary lock-open mechanism incorporated in a safety valve employed in the subterranean well, the apparatus including an annular mandrel having an external, axially movable, radially expandable collet operated b... | 11/02/1982 |
| 4354513 | Cuttings washer assembly Particulate matter is deposited on an inclined vibrating screen. A spray of wash solution is directed onto the cuttings. As the cuttings move down the incline, the vibration agitates the wash solution and hydrocarbon contaminants from the cuttings. The so... | 10/19/1982 |
| 4349175 | Valve actuator having a continuously charged accumulator An actuator is provided which is respondable to control fluid pressure for moving an operative means of a valve between open and closed positions. Valve means are movable between open and closed positions and communicate between the accumulator means and ... | 09/14/1982 |
| 4349043 | Method and apparatus for prevention of over-pressurization of a pressure responsive device An apparatus and method are provided in which the apparatus is insertable along a pressure transmission conduit extending from a source point to a pressure responsive device, such as a safety valve in a subterranean well. The apparatus has a fluid passage... | 09/14/1982 |
| 4349204 | Non-extruding inflatable packer assembly An extrusion resistant expansible element for use as a sealing element or packer in a subterranean well bore. The expansible element comprises an inner elastomeric sleeve to which fluid pressure is internally applied to produce the expansion forces. The i... | 09/14/1982 |
| 4346256 | Conduit in supplying electrical power and pressurized fluid to a point in a subterranean well A conduit is provided for transmitting both electrical power and pressured hydraulic fluid from the surface to a point in a subterranean well. The conduit comprises an outer housing formed of steel or other high tensile strength material and one or more i... | 08/24/1982 |
| 4345651 | Apparatus and method for the mechanical sequential release of cementing plugs An apparatus and method are provided for holding and selectively mechanically releasing at least one plug device utilized in cementing a subterranean well, preferably a subsea well. The apparatus is securable and carryable on a manipulatable conduit, such... | 08/24/1982 |
| 4344651 | Corrosive environment tension packer A packer assembly and its method of use are provided, the packer assembly being carried on a first conduit for use in wells exposed to corrosive injection fluids, the well being encased by a second conduit having a locking recess defined therein, such as ... | 08/17/1982 |
| 4342657 | Method for breaking petroleum emulsions and the like using thin film spreading agents comprising a polyether polyol The invention relates to a method of breaking petroleum emulsions, by utilization of a homogeneous, micellar solution of a water-insoluble thin film spreading agent comprising: (a) from between about 5% and about 75% by weight of a polyether polyol; (b) f... | 08/03/1982 |
