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7624810 |
Ball dropping assembly and technique for use in a well
A technique that is usable with a well includes running string that includes a tool and a flowable object that is held in a retained position within the string downhole in the well. After the...
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7624792 |
Shear activated safety valve system
A safety valve system includes a safety valve having an actuator and a line connected to the actuator. The safety valve is operable by opening the line in the well, with the line being free of any...
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7617874 |
Flexible matrix composite actuator for use in subsurface wellbores
A valve control system for a wellbore includes a fiber composite actuator functionally coupled to a valve operating member and means for controllably charging an interior of the actuator with fluid...
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7614454 |
Downhole actuation method and apparatus for operating remote well control device
A method for repeatably providing large operating forces to actuate a remote device in a well which includes well production means penetrating to some depth, surface means for restricting or...
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7597149 |
Safety valve with extension springs
A safety valve with extension springs. In a described embodiment, a valve for use in a subterranean well includes a closure member having open and closed positions. A structure displaces to cause...
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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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7584800 |
System and method for indexing a tool in a well
A technique is provided to control a downhole tool in a well. An indexer is used to adjust a downhole tool to specific positions on a plurality of positions. The indexer is actuated between...
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7575051 |
Downhole vibratory tool
A vibratory tool for downhole use is capable of letting a wireline or other tools pass a passage therethrough that can be subsequently closed by landing a plug on a seat. The dump valve is disposed...
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7562712 |
Setting tool for hydraulically actuated devices
A tool is actuated in a well based on one or more issued commands being interpreted and implemented by the apparatus. The apparatus comprises a power generation module that multiplies pressure...
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7552774 |
Control line hydrostatic minimally sensitive control system
A control system for a downhole tool, such as a subsurface safety valve, features an operating piston that is insensitive to tubing pressure in the valve. The hydrostatic forces from the single...
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7552773 |
Multicycle hydraulic control valve
A multicycle hydraulic control valve. A control and actuation system for a well tool includes a control valve having one or more metal-to-metal seals which open while differential pressure exists...
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7537056 |
System and method for gas shut off in a subterranean well
A gas inflow control system is used in a well. A downhole tool is combined with an automatic valve that is automatically actuatable to a flow position in the presence of a well liquid flowing into...
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7503385 |
Single line control module for well tool actuation
A single line control module for well tool actuation. A well tool control system includes an actuator, a control module for controlling pressure applied to the actuator, and a single line extending...
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7467658 |
Down hole drilling fluid heating apparatus and method
An apparatus for providing heat energy to a fluid, including a housing adapted for connection into a working string and for inserting into a borehole, a flow path for the fluid extending within the...
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7464761 |
Flow control system for use in a well
A technique is provided to control flow in a well. A well completion comprises one or more flow control valve systems coupled by an electric line and a hydraulic line. Each flow control valve...
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7464759 |
Method for flowing fluid into or from a well
A method for injecting fluid into a well or producing fluid from a well comprising providing one or more single fluid line sliding sleeve downhole tool assemblies into a well in a closed position,...
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7455114 |
Snorkel device for flow control
The present invention provides for the operation of a downhole flow control device using a snorkel tube.
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7438130 |
Downhole actuating apparatus and method
A method and apparatus for actuating a downhole tool is provided. The apparatus of the present invention includes a remotely energized actuator device that facilitates storage of energy needed to...
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7424917 |
Subsea pressure compensation system
Systems and method for operating subsea devices and pressure compensated reservoir systems useful therewith which in certain aspects, include a chamber with a piston therein acted on an exposed...
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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...
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7389821 |
Downhole trigger device having extrudable time delay material
A trigger device for setting a downhole tool includes a retaining member that restricts the downhole tool from setting until it is properly positioned within the well and a force acts upon an...
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7363980 |
Downhole flow control apparatus, operable via surface applied pressure
Flow control apparatus, for placement in a downhole location in the tubing string of a well. The apparatus comprises a valve element and a lock element. Application and removal of annulus pressure...
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7357198 |
Downhole apparatus
The invention relates to apparatus for use in wellbores and particularly, but not exclusively, to circulating subs used during downhole drilling operations. The apparatus includes a control groove...
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7331396 |
Subsea production systems
A subsea production system is disclosed. The subsea production system may comprise a well head, a tubing spool, a tubing hanger, an annulus, a production tree, and a bypass flow path.
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7331392 |
Pressure range delimited valve
A differential pressure valve has a valve body containing a main piston axially moveable therein to open a fluid inlet to a fluid outlet at preset high pressure and to close at a preset lower...
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7311153 |
Flow-biased sequencing valve
A technique that is usable with a well includes providing a sequencing valve to in a first state to communicate a first flow through a first port of the valve and in a second state close fluid...
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7306043 |
System and method to control multiple tools through one control line
The invention is a system and method a system used to control multiple downhole tools with one control line. The downhole tools may comprise any hydraulically actuated tools, such as valves,...
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7303020 |
Interventionless oil tool actuator with floating piston and method of use
An interventionless actuator for oil well tools is described wherein the actuator comprises at least one floating piston adapted to equalize a pressure differential and lock onto an actuating...
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7299866 |
Apparatus and method for cleaning out sand from an underbalanced hydrocarbon producing well
An apparatus and method is used in the cleaning out of sand in underbalanced gas wells. The present invention includes a valve subassembly equipped with an emergency shutin device to remotely...
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7296624 |
Pressure control apparatus and method
Pressure control in an isolated lower wellbore annulus, defined by a conduit sealably positioned within an isolated lower wellbore segment, is achieved while gravel packing by sensing the pressure...
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7264059 |
Method and device for pressure controlled sequential operation
A method and a device for controlling a downhole hydraulic sequential control system ( 1 ) in which a number of pressure relief valves ( 20, 22 ) are arranged to open sequentially directly or...
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7252153 |
Bi-directional fluid loss device and method
A fluid loss device including a flapper and seat assembly that provide a seal on a lower flapper surface when the flapper is closed and resists pressure in either direction. The flapper and seat...
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7240737 |
Direct proportional surface control system for downhole choke
A direct proportional control system for remotely controlling actuation of a tool. A well control system includes an actuator for a downhole well tool, the actuator including an actuator member...
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7204315 |
Dual valve well control in underbalanced wells
A method of isolating a reservoir of production fluid in a formation comprises providing a pair of valves ( 14, 16 ) in a bore intersecting a production formation and in which the hydrostatic...
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7201230 |
Hydraulic control and actuation system for downhole tools
A hydraulic control and actuation system for downhole tools. In a described embodiment, a hydraulic control and actuation system includes an internal chamber serving as a low pressure region and a...
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7178600 |
Apparatus and methods for utilizing a downhole deployment valve
Methods and apparatus for utilizing a downhole deployment valve (DDV) to isolate a pressure in a portion of a bore are disclosed. Any combination of fail safe features may be used with or...
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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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7159662 |
System for controlling a hydraulic actuator, and methods of using same
The present invention is directed to a system for controlling a hydraulic actuator, and various methods of using same. In one illustrative embodiment, the system comprises a first hydraulic...
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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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RE39209 |
Production fluid control device and method for oil and/or gas wells
A device and method for selectively controlling the flow of production fluid through a tubing string in an oil and gas well according to which a housing is connected to a tubing string for...
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7013980 |
Hydraulically actuated control system for use in a subterranean well
A control system for use in controlling actuation of tools in a subterranean well. In a described embodiment, a control system includes a well tool, an actuator for the well tool and a control...
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6978841 |
Sand removal and device retrieval tool
A simple debris removal apparatus for use in a wellbore. In one aspect of the invention a modular, interchangeable venturi is provided which can be retrofit into an existing debris bailer having a...
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6904975 |
Interventionless bi-directional barrier
An interventionless bi-directional barrier device of a downhole tool for use in a wellbore and a method of utilizing the barrier device to control the flow of production fluids in the wellbore are...
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6889771 |
Selective direct and reverse circulation check valve mechanism for coiled tubing
A method and apparatus for selectively actuating a dual check valve assembly within a well for a direct circulating operational mode or a reverse circulating operational mode. A tubular housing...
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6877566 |
Method and apparatus for causing pressure variations in a wellbore
A method and apparatus for causing pressure variations in a wellbore. A valve mechanism and a sealing device are provided in the wellbore. The valve mechanism is part of a valve device which may be...
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6867706 |
Frequency regulation of an oscillator for use in MWD transmission
An oscillating valve driven by the pressure in a mud pulser develops a pressure variation in the mud pulse signal that is at a frequency that is different than the frequencies of the mud system....
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6866100 |
Mechanically opened ball seat and expandable ball seat
A method and apparatus for obstructing the passage of fluid within a fluid flow conduit and subsequently reconfiguring the tool to allow substantially full-bore passage therethrough. Pressure...
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6827146 |
Double bellows gas lift valve “faustoval”
The phase of this process is done by the functionality of the perforated lower stem, which due to the fact that its internal conduit is able to connect the lower bellow in an alternated way, first...
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6782951 |
Flow-activated valve and method of use
According to the present invention, the flow-activated valve assembly is a fluid-driven tool for use in various down hole drilling and fishing operations, which is activated by the introduction of...
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6755253 |
Pressure control system for a wet connect/disconnect hydraulic control line connector
A pressure control system for a wet connect/disconnect hydraulic control line connector includes a reservoir and a piston in said reservoir. The reservoir contains hydraulic fluid or equivalent and...
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