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7637326 |
Downhole safety valve apparatus and method
A safety valve ( 100 ) replaces an existing safety valve ( 102 ) in order to isolate a production zone from a tubing string when closed. Preferably the safety valve ( 100 ) includes a flow...
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7604063 |
Flow valve and method
An apparatus for controlling the flow of a medium. The apparatus comprises a base having a plurality of arms extending from the base. The base and arms define a cage. A valve member is positioned...
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7591319 |
Gas activated actuator device for downhole tools
An actuator device for setting a downhole tool is disclosed. The actuator device includes a gas releasing material that releases a gas when activated by a solvent or other activator. The gas...
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7533728 |
Ball operated back pressure valve
A method for selectively closing a downhole one way check valve, the method having the following steps: attaching the valve to a casing; locking the valve in an open configuration; running the...
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7520329 |
Injection valve
A valve for use in a downhole tool The valve has an inlet communicating with the work string from which it is anchored. The inlet provides a flow path of a first cross-sectional area. A sealing...
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7510018 |
Convertible seal
A method and apparatus for sealing a wellbore is described herein. A convertible seal includes a sealing element and a valve. The sealing element is in fluid communication with the valve and...
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7500523 |
Valve for controlling the flow of fluid between an interior region of the valve and an exterior region of the valve
Embodiments of the invention are directed to a valve. In one embodiment, the valve includes a body having a first biasing member and a sealing member configured to axially move inside the body...
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7377327 |
Variable choke valve
Embodiments of the present invention generally provide a more reliable variable choke flow control valve. In one embodiment, a variable choke valve for use in a wellbore is provided. The valve...
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7341108 |
Well downhole liquid dispenser
A well downhole liquid dispenser is disclosed in which an inlet/discharge port assembly is provided having an inlet port in fluid communication with the shoulders of a conical piston. The point of...
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7240739 |
Well fluid control
A well conduit that has an aperture for communicating with a target reservoir and a one-way valve in the aperture may be used in injection and production wells. Other devices, systems, methods, and...
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7234529 |
Flow switchable check valve and method
According to one embodiment of the invention, a flow switchable check valve includes a housing, a guide member having a bore extending therethrough disposed within the housing, and a poppet having...
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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...
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7191830 |
Annular pressure relief collar
The present invention is an apparatus for relieving annular fluid pressure between nested casing strings. The invention includes a pressure relief collar formed of a cylindrical housing and a set...
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7168492 |
Wellbore annulus flushing valve
The invention relates to downhole wellbore apparatus and particularly, but not exclusively, to apparatus for use in wellbore cleaning operations. A downhole tool ( 2 ) comprises a body ( 4 ) having...
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7134488 |
Isolation assembly for coiled tubing
An isolation assembly for use with coiled tubing is described. The isolation assembly has a check valve for providing selective fluid communication through from the coiled tubing, through the...
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7108068 |
Floating plate back pressure valve assembly
A back pressure valve assembly for use in a well casing string. The valve assembly comprises a housing with a stationary and a floating plate therein. The floating plate is moveable between an open...
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7069997 |
Valve cage insert
The insert for a ball and seat valve comprises a tubular cylindrical body formed by vertically spaced apart top and bottom rings joined by helically inclined and circumferentially spaced apart ribs...
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7048079 |
Mud saver valve
A three-part sub-assembly comprising a wire line retrievable spear. The spear having two fluid chambers. A diverter valve having a truncated, inverted cone valve seat is preferably threaded into...
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7017671 |
Mud saver valve
A mud saver valve being operable in conjunction with a top drive unit to retain mud in the top drive unit when a tubular is disconnected therefrom. The valve utilizes a spring-loaded piston to...
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6966366 |
Plunger enhanced chamber lift for well installations
The present invention is addressed to a method of retro-fitting a well installation to reconfigure it to provide plunger enhanced chamber lift. The method comprises the steps of providing a...
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6942039 |
Flapper valve and associated method for single trip retrieval of packer tools
A method of providing for a single trip removal of packer tools by providing a flapper valve in the upper packer tools which opens when pressure below the tool exceeds the pressure above the tool...
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6880639 |
Downhole injection system
A system for the downhole injection of chemical into a well through capillary tubing using a surface chemical pump includes downhole injection valve. The downhole injection valve includes an...
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6851480 |
Gas operated automatic, liquid pumping system for wells
An improved, unattended, liquid pumping device for oil and gas wells featuring a bellows controlled flow valve that opens and closes at preset pressures. Additionally a well head receiver design...
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6808023 |
Disconnect check valve mechanism for coiled tubing
A tubing conveyed disconnect check valve mechanism having releasable connection with a payload tool and being selectively actuated downhole for disconnecting from the payload tool for retrieval by...
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6789626 |
Apparatus and method for cleaning debris from wells
A system and method for restarting a downhole pump that has seized due to an accumulation of debris above the pump and around the pump intake. The system consists of a flexible annulus sealing...
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6758273 |
Low-flow groundwater sampling system
Methods, apparatus, and systems for low-flow sampling of a fluid source. One illustrative embodiment of the invention is directed to a method for manually sampling a fluid source in a well,...
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6715555 |
Subsea well production system
A tubing hanger positioned within the bore of a wellhead body has a vertical bore from which a tubing string may be suspended within a well bore. When the hanger is landed, a fluid passageway in...
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6684950 |
System for pressure testing tubing
A system and method is provided for pressure testing a tubing string. A valve is utilized within the tubing string to enable selective application of pressure in the tubing above the valve....
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6640824 |
Mud saver kelly valve
A mud saver valve is described that features an outer housing that retains upper and lower valve pistons therewithin. The pistons coordinate to provide a check valve so that fluid, such as drilling...
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6629566 |
Method and apparatus for removing water from well-bore of gas wells to permit efficient production of gas
Method and apparatus for removing water from a gas well to permit efficient production of gas while protecting formation from introduced pressures. The apparatus comprises a one-way-valve that...
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6622795 |
Flow actuated valve for use in a wellbore
The present invention generally relates to a flow-actuated valve for use in a wellbore. The invention includes a body having a closing member and a seat. The closing member and seat are separable...
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6585048 |
Wellbore system having non-return valve
In a wellbore system, non-return valves placed in one or more well boreholes within the system. The valves are placed in the production string downstream from the producing zones, the valve having...
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6571876 |
Fill up tool and mud saver for top drives
A tubular tool body carried at the end of a drilling rig top drive is received within a drill string being used as a landing string to position casing in a wellbore. External threads on the tool...
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6536521 |
Multi-stage liquid elevator
A multi-stage liquid elevator which is assembled from individual stages is a fabricated from ordinary pipe components and has no moving parts. Each elevator stage consists of a reservoir defined by...
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6520256 |
Method and apparatus for cementing an air drilled well
A downhole cementing system employing a cement choke within the casing to reduce the downward velocity of cement through the casing and thereby inhibit formation fracturing caused by vibration of...
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6457520 |
Bottom hole assembly with coiled tubing insert
An Internal Bottom Hole Assembly (IBHA) for a Coiled Tubing (CT) enables the CT to be used with other devices downhole. The IBHA includes a connector, a valve assembly and an emergency disconnect...
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6427773 |
Flow through bypass tubing plug
A tubing plug is adapted for insertion into a tubing string for sealing the tubing string. The tubing plug is comprised of a housing having an outer surface, wherein the housing is adapted for...
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6425413 |
Valve with secondary load bearing surface
A valve ( 120 ) for controlling fluid flow therethrough in downhole applications is disclosed. The valve ( 120 ) comprises a valve housing having a valve closure mechanism ( 122 ) and a valve seat...
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6386289 |
Reclosable circulating valve for well completion systems
A valve for use in a tool positioned in a well that includes a body having a bore and a port connected to permit fluid communication between the well and the bore. A piston is supported in the body...
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6354378 |
Method and apparatus for formation isolation in a well
An isolation system and method for use in a wellbore that passes through a formation includes a flow conduit capable of receiving a fluid flow from the formation and an isolation system coupled to...
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6341652 |
Backflow prevention device
A system for preventing backflow of a fluid from one zone to another, e.g. from a lower wellbore zone to an upper wellbore zone. The system is deployed in cooperation with a tube, such as a tube...
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6289926 |
Flapper valve assembly with seat having load bearing shoulder
A flapper valve assembly (120) for controlling fluid flow therethrough is disclosed. The flapper valve assembly (120) comprises a tubular valve housing having a valve chamber. A valve seat (124) is...
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6289992 |
Variable pressure pump through nozzle
An apparatus for insertion into a well to displace well fluid. A flexible hose is lowered into an annulus between strings of casing. A nozzle is affixed to the lower end of the hose. During...
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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...
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6199636 |
Open barrel cage
An open type cage, having exterior threads and three equally spaced slots, which locates and contains the stationary or standing ball and seat check valve, and connects to standardized, stationary...
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6186239 |
Casing annulus remediation system
A casing annulus remediation system for lowering a flexible hose into an annulus between strings of casing in a petroleum well by pressurizing the hose so that the hose is rigid and may be forced...
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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...
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6148920 |
Equalizing subsurface safety valve with injection system
A pressure equalizing subsurface safety valve with a fluid injection system is provided. A fluid injection conduit is connected from a source of injection fluid, such as at the earth's surface, to...
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6102060 |
Detachable locking device for a control valve and method
A valve device for use downhole is described as comprising a body member and a channel through the body member through which fluid can flow. A moveable member is mounted within the body member, and...
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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...
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