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| Number | Title | Issue Date |
| 7322417 | Technique and apparatus for completing multiple zones An apparatus that is usable with a well includes a string and a plurality of tools that are mounted in the string. The string includes a passageway. The tools are mounted in the string and are adapted to be placed in a state to catch objects (free-falling objects an... | 01/29/2008 |
| 7188674 | Downhole milling machine and method of use The present invention is directed to a method and apparatus for providing a pathway for fluid communication through a tubing-retrievable subsurface safety valve (TRSSV). The method and apparatus are designed to be deployed within a hydrocarbon wellbore after the TRS... | 03/13/2007 |
| 7156119 | Hydrant knock-off combination flow stop and backflow check valve A hydrant knock-off combination flow stop valve and backflow check valve, mountable between water system riser and a wet-type hydrant having a breakaway flange ring. The vertical valve has a bulbous, cylindrical outer wall having an upper flange connecting to a wet-... | 01/02/2007 |
| 7128083 | Wet barrel fire hydrant flow preventer The present invention provides a fluid flow prevention apparatus for a wet barrel fire hydrant which is simple and inexpensive to install and effectively cuts off water flow while reducing water hammer. The fluid flow apparatus includes an in-line valve member for c... | 10/31/2006 |
| 7124770 | Shear mechanism for backpressure relief in a choke valve The present invention relates to a mechanism for preventing damage to the actuator of a hydraulic choke valve in the event of excessive backpressure on the outlet of the choke. The backpressure relief device is applicable to a choke valve which meters flow from a hi... | 10/24/2006 |
| 7080486 | Pass-through firestop device A cast-in-place pass through firestop device for providing a passage in a partition in a structure through which wires, cables, pipes, and the like are run includes a housing having a riser portion with frangible connections that define removable bands that can be r... | 07/25/2006 |
| 7055605 | Downhole circulation valve operated by dropping balls A downhole tool (10) for selectively circulating fluid in a borehole is disclosed. The tool operates via the use of a combination of deformable drop balls (36) and smaller hard drop balls (40). In use a deformable drop ball (36) moves a s... | 06/06/2006 |
| 7044151 | Piston-activated valve and methods and apparatus for restraining free play in a device Apparatus and methods for fitting mechanical parts to minimize prevent free play are described. An apparatus having a piston is designed so as to restrain the piston before actuation, and so as to allow the piston to gain momentum before striking an object. The desc... | 05/16/2006 |
| 6966380 | Valves for use in wells A valve assembly to control the intake of fluid. The valve assembly has a valve body and a valve choke disposed therein. The valve choke has a choke bore through the interior of the valve choke. The valve choke has a plurality of orifices to the choke bore spaced at... | 11/22/2005 |
| 6923430 | Valve A valve which intended to control the flow of a fluid, for example a gas, comprises a valve body (50), an internal member for opening and shutting-off the passage of the gases, an operating handwheel (56) connected to the opening and shut-off member, a... | 08/02/2005 |
| 6644336 | Method and apparatus for automatic shutoff of a valve when a substance is present in a flow of fluid A tensile load is applied to a sensor element that will carry the tensile load in the absence of a substance and will fail to carry the tensile load in the presence of the substance. The sensor element is disposed in a flow of fluid, and a flow control me... | 11/11/2003 |
| 6314982 | Link apparatus An extendable/retractable link apparatus 10 defines a fluid passage therethrough and may be connected between two relatively moveable components, e.g. an aircraft ejector seat and the adjacent fixed airframe, so that, when there is relative movement withi... | 11/13/2001 |
| 6148915 | Apparatus and methods for completing a subterranean well Methods and apparatus provide desired levels of continuous fluid pressure in a portion of a wellbore during completion operations. In a described embodiment, a method permits continuous fluid communication between a tubular string extending to the earth's... | 11/21/2000 |
| 6035880 | Pressure activated switch valve A pressure activated valve and associated methods of using same provide increased functionality and convenience in actuating a tool operatively positioned within a subterranean well. In a described embodiment, a switch valve is utilized to control actuati... | 03/14/2000 |
| 5992441 | Fuel vapor vent valve A fuel vapor vent valve for a motor vehicle is connected to an upper wall of a fuel tank in vertically depending relationship. The valve has a cover with a vapor exit passage connected to a fuel vapor storage canister and a body depending from the cover. ... | 11/30/1999 |
| 5609179 | Automatic shut-off valve An automatic shut-off valve for a fire hydrant or other device that is vulnerable to breakage, which is attached to a straight-walled fluid carrying pipe, the valve having a pair of separated mounting rings (20 and 22) positioned in the pipe near the brea... | 03/11/1997 |
| 5598864 | Subsurface safety valve A subsurface safety valve has a tubular valve housing, a valve closure member movable between an open and a closed position, an axially shiftable flow tube for opening the valve closure member, a spring for biasing the flow tube to a closed position, a pi... | 02/04/1997 |
| 4628996 | Full opening check valve In accordance with the invention, a full opening check valve is provided which will close in response sustained high velocity flow through the valve. In one embodiment, a downhole blowout preventer is provided having a rigid outer sleeve which may be inte... | 12/16/1986 |
| 4611617 | Irrigation valve control apparatus An apparatus mountable on an irrigation pipe or other type of pipeline for use in controlling valves disposed within those pipes. The apparatus includes a mounting bracket which is attachable to the valve mechanism and the irrigation pipe. The mounting br... | 09/16/1986 |
| 4570658 | Pyrotechnic-actuated dual air valve A pyrotechnically actuated dual air valve is hermetically sealed on both et and both outlet ports of static and dynamic air ducts until the dual air valve is actuated by a squib charge. A single piston, when activated by the squib charge, concomitantly o... | 02/18/1986 |
| 4550743 | Bursting disc orientation device A bursting disc orientation device comprises a cut-away portion (7) on a predetermined one collar (2) of the bursting disc unit and cooperable with the cut-away portion, a projection (8) e.g. in the form of an arm of an angle bracket (9) secured to the pe... | 11/05/1985 |
| 4460046 | Control fluid communication nipple A communication nipple for communicating control fluid flow from the outside of a well tool to the inside of a well tool through a fluid passage in the well tool without the use of elastomer seals. A metal breakable screw extends vertically into and initi... | 07/17/1984 |
| 4307744 | Frangible intertank valve assembly The invention pertains to a conduit assembly consisting of a flexible hose having a self sealing valved fitting at each end, such assembly being suitable for interconnecting aircraft fuel cells. The assembly is crashworthy in that upon displacement of the... | 12/29/1981 |
| 4279266 | Sleeve valve Sleeve valve for a tank having an opening therein.... | 07/21/1981 |
| 4274484 | Dump valve Disclosed is an apparatus for swabbing wells. A cup type swab and dump valve are carried on the same mandrel. The dump valve protects the apparatus from excessive fluid load and drag.... | 06/23/1981 |
| 4097241 | Pyrotechnic tire inflator A light, portable, miniaturized tire inflator adapted to fit in a limited space, such as in a tire well for a deflated, space-saving tire in a trunk of an aubomobile, and adapted to be carried or held in one hand. The tire inflator includes: a pyrotechnic... | 06/27/1978 |
| 4088298 | Check valve assembly A check valve assembly for permitting unrestricted flow in one direction and limited flow in the reverse direction comprising: a valve body having a longitudinal flowbore therethrough; a seat member carried by the valve body; a closure member carried by t... | 05/09/1978 |
| 3954138 | Safety plug for sealing-off the tubing of a producing oil or gas well A safety plug for sealing-off the tubing in a deep producing well comprises a body fitted within the tubing by means of O-ring seals, an axial valve having two heads in opposition which are capable of being applied against top and bottom seatings of the b... | 05/04/1976 |
