Class 166/332.7 - Having equalizing valve

Subclass of Class 166 - Wells
Definition: Longitudinally moveable operator including a flow regulating
No. of patents: 40
Last issue date: 03/15/2011

Number	Title	Issue Date
7905292	Pressure equalization device for downhole tools A pressure equalizing tool can be run into a downhole tool on wireline or coiled tubing preferably and temporarily secured before being actuated to separate two components in a downhole tool that are in a sealing relation but are configured to be temporarily movable...	03/15/2011
7762336	Flapper latch The present invention generally relates to a method and an apparatus for selectively isolating a portion of a wellbore. In one aspect, an apparatus for isolating a zone in a wellbore is provided. The apparatus includes a body having a bore. The apparatus further inc...	07/27/2010
7422065	System for controlling zones of fluid in and out of a wellbore A system for controlling zones of fluid flow in and out of a wellbore. The wellbore has a top of a well and a bottom of a well. The system has a control line connected to a power source, and a control system; wherein the control line is disposed within the wellbore....	09/09/2008
7363981	Seal stack for sliding sleeve A method and apparatus for sealing a tool for use in a wellbore is provided. The seal is configured to be disposed in a tool comprising a ported sliding sleeve and a ported housing. The tool may be actuable between a closed and an open position. The seal is configur...	04/29/2008
7347273	Bottom hold completion system for an intermittent plunger A bottom hole assembly for an intermittent lift plunger system includes a retrievable downhole anchor which may be set and reset in one downhole trip, a retrievable packing device, and a plunger stop. ...	03/25/2008
7204313	Equalizing flapper for high slam rate applications A flapper valve assembly is described having an equalizing port assembly with a bleed valve member that is moveable between an open position and a closed position. The equalizing port assembly features a structural support member in the form of a retainer key that i...	04/17/2007
7191843	Valve apparatus with seal assembly A valve apparatus. The valve apparatus is disposed within a well so that an annulus is formed between an outer portion of the valve and an inner portion of the well. In one preferred embodiment, the valve apparatus comprises an outer mandrel containing an annulus po...	03/20/2007
7137450	Electric-hydraulic power unit The present invention is directed to an electric-hydraulic power unit. In one illustrative embodiment, the power unit comprises a body having a movable pressure barrier positioned therein, the movable pressure barrier defining first and second chambers therein, a co...	11/21/2006
6983803	Equalizer valve and associated method for sealing a fluid flow A dirty fluid valve for sealing high differential fluid pressures in a drilling environment and methods for using such a valve is disclosed. One embodiment of the valve includes a seal cartridge having several openings for directing a fluid path through the cartridg...	01/10/2006
6973974	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...	12/13/2005
6848509	Pressure equalizing plunger valve for downhole use An equalizer valve for a flapper in an SSV has one embodiment where the plunger body is covered with a lubricious material in the bore in the flapper to counteract wear caused by off-center contact with the plunger by the flow tube. In another embodiment the flow tu...	02/01/2005
6763892	Sliding sleeve valve and method for assembly A sliding sleeve valve and method for assembly is disclosed. The valve comprises a segmented main body that is assembled from a top, middle and bottom segments. The middle segment has flow apertures. A closing sleeve is co-axially mounted in the assembled main body....	07/20/2004
6644408	Equalizing flapper for down hole safety valves An equalizer valve for a flapper in a subsurface safety valve is described. A tapered plunger is biased by compact spring disposed in the plunger bore. The spring is supported by a C-shaped ring extending into a peripheral groove around the plunger bore....	11/11/2003
6474419	Packer with equalizing valve and method of use A packer with an equalizing valve for automatically equalizing the pressure above and below the packer element. The packer comprises a housing having an equalizing valve disposed therein. A packer element is disposed about the housing for sealingly engagi...	11/05/2002
6347668	Relievable check valve assembly for oil wells and water wells A relievable check valve assembly having various trigger forms for oil wells and water wells adapted to control the liquid flow when inserted tubing is being removed from a well....	02/19/2002
6325153	Multi-valve fluid flow control system and method A system and method for controlling production fluid flow from a chamber extending between a casing disposed in a downhole bore and tubing disposed in the casing. A plurality of valves are disposed in respective openings formed in the tubing, and a passag...	12/04/2001
6296061	Pilot-operated pressure-equalizing mechanism for subsurface valve A subsurface valve with a pressure-equalizing mechanism is provided to permit pressure above and below a valve closure member to equalize prior to the opening of the valve closure member. The pressure-equalizing mechanism may be installed, for example, in...	10/02/2001
6283217	Axial equalizing valve A subsurface valve with a pressure equalizing mechanism is provided to permit pressure above and below a valve closure member to equalize prior to the opening of the valve closure member. An actuating key is releasably engageable with a recess in a flow t...	09/04/2001
6237693	Failsafe safety valve and method A subsurface well safety valve having a flow tube telescopically movable in a housing for controlling the movement of a valve closure member. A piston and cylinder assembly actuates the flow tube and is in communication with hydraulic control fluid from t...	05/29/2001
6112816	Single-phase annulus-operated sliding sleeve A sliding sleeve is provided to control the flow of fluids through a tubular conduit. The sliding sleeve may include a housing having a longitudinal bore, at least one annulus pressure port, and at least one fluid flow port. An inner sleeve is disposed fo...	09/05/2000
6109356	Well completion tool having pressure relief capability incorporated therein and associated method A well tool is disclosed, which includes features that enhance the reliability and safety of wellsite operations. In one disclosed embodiment, a pressure relief device is incorporated in a well completion tool. The pressure relief device is in fluid commu...	08/29/2000
6079497	Pressure equalizing safety valve for subterranean wells A subsurface safety valve having a valve member with a pressure equalizing mechanism is provided. The valve member includes a bore therethrough for receiving an equalizing plug. A beam is attached to the upper surface of the valve member for transferring ...	06/27/2000
5884705	Equalizing valve seat for a subsurface safety valve An equalizing subsurface safety valve for controlling fluid flow in a well conduit has a tubular body member with a longitudinal bore extending therethrough, and a flapper hingably connected within the tubular body member to alternately permit and prevent...	03/23/1999
5752569	Flow tube for use in an equalizing subsurface safety valve An equalizing subsurface safety valve for controlling fluid flow in a well conduit comprises a tubular body member having a longitudinal bore extending therethrough, a flapper hingably connected within the tubular body member to alternately permit and pre...	05/19/1998
5704393	Coiled tubing apparatus The apparatus and method for injecting coiled tubing downhole includes a connector member disposed on the end of the coiled tubing and supporting a downhole tool. The connector member includes a dual check valve in the fluid passageway which allows fluid ...	01/06/1998
5503229	Equalizing subsurface safety valve An equalizing subsurface safety valve for controlling fluid flow in a well conduit has a tubular body member with a longitudinal bore extending therethrough, and a flapper hingably connected within the tubular body member to alternately permit and prevent...	04/02/1996
5156209	Anti blow-out control apparatus In a downhole assembly (1) including an outer casing or mandrel (2), an axially movable prong (11) in the mandrel, and means for equalizing pressure within the mandrel (1) comprising a fluid duct (7) communicating the interior of the mandrel with the outs...	10/20/1992
5156220	Well tool with sealing means A downhole well tool is provided which includes a shifting sleeve for opening a flow communication port. The well tool includes first and second primary seal elements positioned upstream and downstream, respectively, of the port as well as upstream and do...	10/20/1992
4991654	Casing valve A casing valve includes an outer housing with a sliding sleeve. First and second seals define a sealed annulus within the housing. A latch is disposed in the sealed annulus for latching the sliding sleeve in its first and second positions. The housing has...	02/12/1991
4915175	Well flow device A sliding sleeve valve well flow control device having a tubular nipple connectable in a well tubing string and side ports for flow into the nipple and a retrievable pack-off sleeve insertable into the nipple for closing the side ports, the sleeve includi...	04/10/1990
4848457	Annulus sliding sleeve valve An annulus valve for a well concentric tubing hanger has features to prevent damage to the seals. The annulus valve has a closure sleeve that when moved to an open position, communicates fluid from an annulus between casing and tubing to a point above the...	07/18/1989
4487261	Well completion and testing system A well completion and testing system and method. The system includes a tubing string having an integral locking sub and a testing probe assembly for use with well testing instruments and having an equalizing and bypass valve, the probe assembly being rele...	12/11/1984
4473122	Downhole safety system for use while servicing wells A safety valve which prevents undesired fluid flow while conducting hydraulic workover or snubbing operations on a well. The safety valve includes three separate valve portions for blocking fluid flow. A poppet valve can be opened and closed from the well...	09/25/1984
4407329	Magnetically operated fail-safe cutoff valve with pressure equalizing means A magnetically operated fail-safe cutoff valve of general application and particularly suitable for down hole fluid well applications is provided having a simple highly reliable valve for equalizing the pressure across the main cutoff valve while closed t...	10/04/1983
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
4278131	Port apparatus for well piping A port apparatus for well piping comprising a sleeve valve mounted in longitudinally slideable engagement with the bore of an outer housing, the sleeve valve having an open position, a pressure equalization position, and a closed position, the sleeve valv...	07/14/1981
4134452	Well testing tool A tool for testing conditions at a specific depth in a well is run into the well on a wire line. The tool includes a stem having sealing rings around its outer surface adapted to seal against the inner wall of a locking assembly mounted on the lower end o...	01/16/1979
4094359	Apparatus and methods for testing earth formations Improved apparatus and methods are provided for conducting drill stem and production testing operations. A bypass sub removably receives a wireline tool in sealing engagement within a bypass sub bore, with the bypass sub including bypass passage means and...	06/13/1978
3981364	Well tubing paraffin cutting apparatus and method of operation Apparatus for use in removing paraffin from a well tubing string above a wireline operated subsurface safety valve assembly installed in the tubing string and its method of operation. The safety valve assembly controls the flow of production oil and/or ga...	09/21/1976
3930540	Wellbore circulating valve A wellbore circulating valve especially useful in a string of testing tools utilizes a sequentially ratcheted inner mandrel which covers a series of flow ports and is opened by a predetermined sequence of operations which move the mandrel away from the fl...	01/06/1976

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Class 166/332.7 - Having equalizing valve