Bizarre Patents
An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8151888 | Well tool with combined actuation of multiple valves A well tool with combined actuation of multiple valves. A well tool includes at least two valves and an actuator which actuates each of the valves, one valve being positioned longitudinally between the other valve and the actuator, and the other valve being operable... | 04/10/2012 |
| 8113286 | Downhole barrier valve A ball type downhole barrier valve capable of bidirectional sealing features a ball rotating on its axis to open or close with control line pressure to an actuating rod piston assembly. The ball is also shiftable to a locked open position. A cage surrounds the ball ... | 02/14/2012 |
| 8074718 | Ball seat sub A downhole tool for providing a pressure differential between sub-assemblies, the downhole tool including an elongated body, a tubular assembly disposed within the elongated body, the tubular assembly including a central flowbore with an inner diameter and a central... | 12/13/2011 |
| 7347286 | Drill string valve assembly A drill string valve assembly includes a tubular valve body, including an outer surface and an inner bore for housing a valve mechanism to control fluid flow through the bore; and an axial load support releasably securable to the outer surface of the valve body, the... | 03/25/2008 |
| 7165608 | Wellbore power generating system for downhole operation A downhole tool (100) for wellbore operations comprises a substantially tubular member (130) that is operably positionable in the wellbore and a rotation member (110) that is rotatably disposed within the substantially tubular member (130... | 01/23/2007 |
| 6957699 | Downhole shut-in tool The invention provides a downhole shut-in tool for obtaining formation pressure data. The tool includes a fast-closing main valve and a pressure-relief valve operable between open and closed positions to effect periodic sealing and release of formation pressure with... | 10/25/2005 |
| 6832656 | Valve for an internal fill up tool and associated method The present invention generally relates to a valve for use in an oilfield tool. The valve includes a valve body and a valve member disposed in the valve body. The valve member is movable between an open and closed position. The valve member includes an aperture ther... | 12/21/2004 |
| 6769490 | Downhole surge reduction method and apparatus A method and apparatus for use in the oil well industry for running in drilling/production liners and sub-sea casings down a borehole through drilling fluid on a drill pipe using a running tool with the benefits of surge pressure reduction are disclosed. In accordan... | 08/03/2004 |
| 6746222 | Bottom discharge valve A bottom discharge valve is located on the bottom of the pump barrel just above the standing valve. The externally threaded pin end of the standing valve threads into the lower internally threaded portion of the bottom discharge valve. The externally threaded or pin... | 06/08/2004 |
| 6715557 | Tool string A tool string for deployment in a wellbore includes an upper string and a lower string. The upper string includes a valve actuator, and the lower string includes a valve. The lower string is adapted to receive the upper string, and the valve actuator controls the op... | 04/06/2004 |
| 6668933 | Ball valve seat and support A ball valve assembly has a lower support, an upper seat, a spherical ball, and linkages for rotating the ball. The lower support has a spherical support surface for the ball. The lower support also has a pair of guides for maintaining alignment of the ba... | 12/30/2003 |
| 6662886 | Mudsaver valve with dual snap action A mudsaver valve is described that has a bi-directional snap action in opening and closing the valve. The mudsaver valve is adjustable for different mud weights and includes a preassembled valve cartridge for ease of assembly. Furthermore, elevated pressu... | 12/16/2003 |
| 6662877 | Formation isolation valve An assembly that is usable in a subterranean well includes a valve, a sleeve and an index mechanism. The valve is adapted to selectively isolate a region of the well, and the sleeve is adapted to be moved by a downhole tool to cause the valve to transitio... | 12/16/2003 |
| 6513594 | Subsurface safety valve In a broad aspect, the invention may include a subsurface safety valve for controlling a fluid flow through a well conduit. The valve may include a housing that has a bore and is disposed within an annulus defined by the space between the well conduit and... | 02/04/2003 |
| 6401826 | Lubricator for underbalanced drilling A system usable with a subterranean well includes a tubing and a lubricator. The tubing is adapted to receive a drill string in a passageway of the tubing, and the lubricator is located downhole and is connected to the tubing. The lubricator is adapted to... | 06/11/2002 |
| 6250383 | Lubricator for underbalanced drilling A system usable with a subterranean well includes a tubing and a lubricator. The tubing is adapted to receive a drill string in a passageway of the tubing, and the lubricator is located downhole and is connected to the tubing. The lubricator is adapted to... | 06/26/2001 |
| 6220359 | Pump through safety valve and method A downhole safety valve and method of operating a safety valve are provided. In general, the safety valve includes a housing having an interior fluid flow passage therethrough and at least one circulating port in the housing for providing fluid communicat... | 04/24/2001 |
| 6176316 | Subsea well head assembly A subsea wellhead assembly is disclosed with an extension spool secured thereto and an in line tree assembly locked within the extension spool. Ball valves are disposed within the vertical bores of the in line tree assembly. Valve actuators are disposed r... | 01/23/2001 |
| 6152229 | Subsea dual in-line ball valves A dual in-line ball valve assembly for a subsea tree intervention tool has a pair of axially-movable pistons and a rotatable linkage member pinned between each of the pistons and the independently operable ball valves. The linkage members have eccentric h... | 11/28/2000 |
| 6131663 | Method and apparatus for positioning and repositioning a plurality of service tools downhole without rotation A method and apparatus is disclosed for downhole remediation. In the preferred embodiment, a bridge plug and service packer can be run into a well on coiled or rigid tubing. The assembly is capable of being set without rotation. The service packer is lock... | 10/17/2000 |
| 6085845 | Surface controlled formation isolation valve adapted for deployment of a desired length of a tool string in a wellbore A method and apparatus is disclosed for building a tool string uphole of any desired length prior to lowering that tool string downhole into a wellbore for the purpose of performing wellbore operations downhole during a single trip into the wellbore. The ... | 07/11/2000 |
| 6073698 | Annulus pressure operated downhole choke and associated methods A downhole choke and associated methods provide enhanced efficiency and accuracy in well sampling and testing operations due to its capability for substantially minimizing the amount of time needed to establish steady state flow conditions in a well, and ... | 06/13/2000 |
| 5992520 | Annulus pressure operated downhole choke and associated methods A downhole choke and associated methods provide enhanced efficiency and accuracy in well sampling and testing operations due to its capability for substantially minimizing the amount of time needed to establish steady state flow conditions in a well, and ... | 11/30/1999 |
| 5894890 | Normally closed retainer valve with fail-safe pump through capability A retainer valve provides increased safety in wellsite operations. In a preferred embodiment, operation of the retainer valve may be responsive to control line pressure or to tubing pressure. The retainer valve response is controlled by several factors, a... | 04/20/1999 |
| 5884703 | Normally closed retainer valve with fail-safe pump through capability A retainer valve provides increased safety in wellsite operations. In a preferred embodiment, operation of the retainer valve may be responsive to control line pressure or to tubing pressure. The retainer valve response is controlled by several factors, a... | 03/23/1999 |
| 5884707 | Normally closed retainer valve with fail-safe pump through capability A retainer valve provides increased safety in wellsite operations. In a preferred embodiment, operation of the retainer valve may be responsive to control line pressure or to tubing pressure. The retainer valve response is controlled by several factors, a... | 03/23/1999 |
| 5884708 | Normally closed retainer valve with fail-safe pump through capability A retainer valve provides increased safety in wellsite operations. In a preferred embodiment, operation of the retainer valve may be responsive to control line pressure or to tubing pressure. The retainer valve response is controlled by several factors, a... | 03/23/1999 |
| 5794699 | Metal-to-metal sliding side door for wells Assemblies and methods are provided for selectively opening and closing a side port in a flow conductor for a well. In general, the sliding side door assembly includes a housing and a door subassembly. The housing has a generally tubular shape defining a ... | 08/18/1998 |
| 5782304 | Normally closed retainer valve with fail-safe pump through capability A retainer valve provides increased safety in wellsite operations. In a preferred embodiment, operation of the retainer valve may be responsive to control line pressure or to tubing pressure. The retainer valve response is controlled by several factors, a... | 07/21/1998 |
| 5518073 | Mechanical lockout for pressure responsive downhole tool An improved mechanical system selectively locks the tester valve of an annulus pressure responsive tester valve in position for an indeterminate number of well annulus pressure cycles. The tester valve can be closed upon demand. The forces which accomplis... | 05/21/1996 |
| 4967844 | Selectively operable ball valve and production packer system A system for installing and removing a production packer and ball valve apparatus in a well casing. The packer apparatus and valve apparatus are transported into a casing with an on/off overshot connected to a string of tubing. The packer is set by tubing... | 11/06/1990 |
| 4903775 | Well surging method and apparatus with mechanical actuating backup A well surging system having pressure actuated ball valves and a mechanical actuating backup for the upper of said ball valves. The apparatus comprises a valve assembly portion containing the upper and lower ball valves which may be independently pressure... | 02/27/1990 |
| 4871019 | Wellbore fluid sampling apparatus A wellbore fluid sampling apparatus includes an elongated barrel member having a chamber formed by a through flow passage opening from the bottom of the barrel member to a port in the barrel member. Spaced apart ball type valve closure members are connect... | 10/03/1989 |
| 4560004 | Drill pipe tester - pressure balanced A spherical valve member type having a drill pipe tester valve and a moving apparatus to provide for moving the spherical valve member axially relative to the housing between its said open and closed positions, thereby permitting downward forces exerted u... | 12/24/1985 |
| 4535852 | Drill string valve actuator An actuator for opening and closing a valve connected into a tubular element at the upper end of a drill string, to close off the flow of fluid through the element, and including a sleeve about the tubular element movable upwardly and downwardly relative ... | 08/20/1985 |
| 4513944 | Valve with latching means A valve and particularly a safety valve for use in controlling flow from a well in which an external motor is utilized to shift the actuator of a valve such as a ball valve. The reciprocating rod of the motor is protected by resilient means between the cr... | 04/30/1985 |
| 4502542 | Well system Disclosed is a well system, particularly adapted to pumpdown operation in which lowering an easily retrievable tool string, including an improved standing valve, into an improved foot valve opens the foot valve for production flow. The standing valve prev... | 03/05/1985 |
| 4470465 | Ball type shut in tool A ball valve type shut in tool having utility in gravel packing operations. The tool comprises a tubular housing having a mechanically actuated valve ball disposed therein. The ball is locked in an open or closed mode by the force of a ring spring expandi... | 09/11/1984 |
| 4406328 | Apparatus for locking a ball valve element in one position A ball valve assembly is provided having an internally projecting pin on the actuating sleeve element for the ball valve which engages a recessed shoulder in the periphery of the valve to prevent accidental displacement of the ball valve from its fully op... | 09/27/1983 |
| 4289165 | Equalizing ball valve member An equalizing ball valve member and valve apparatus for use in a tubing string in a well bore of an oil or gas well to isolate a lower portion of the well bore below a packer including a body having a longitudinal bore therethrough connectible in a well t... | 09/15/1981 |
