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Wells > Valves, Closures Or Changeable Restrictors > Fluid Operated > Variably Opened

Variably Opened

Variably Opened patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

01/16/14 - 20140014352 - Downhole pressure compensating device
The present invention relates to a downhole pressure compensating device for use in combination with a downhole tool, comprising a housing with a chamber and an internal hollow section, a first piston dividing the chamber into a first section and a second section, the first section being in fluid communication...

09/19/13 - 20130240212 - Systems and techniques to actuate isolation valves
A tool that is usable in a well and may include an operator, a switch, a resilient device and an indexer. The switch may be configured to selectively communicate a first force to the operator, thereby actuating the tool. The resilient device may exert a second force. The indexer may...

03/07/13 - 20130056217 - Flow path control based on fluid characteristics to thereby variably resist flow in a subterranean well
A system for variably resisting flow of a fluid composition can include a flow passage and a set of one or more branch passages which intersect the flow passage, whereby a proportion of the composition diverted from the passage to the set of branch passages varies based on at least...

10/06/11 - 20110240298 - Wellhead valve system for adjusting the flow with integrated multiphase flow rate measuring ability
The present invention refers to a wellhead valve system for adjusting the flow, for example, of hydrocarbon, comprising a hydraulic control valve (10) for opening the wellhead made up of a valve body (11) provided with a pipe (14,15) for the passage of a flow (F) of fluids, having an...

09/01/11 - 20110209873 - Method and apparatus for single-trip wellbore treatment
The apparatus consists of a tubular housing carried into the well on a workstring. A series of spaced isolation modules is provided for each zone and carried into the well on a tubular conduit. The first, or most downstream module includes first and second sealing mechanisms to isolate the first...

03/03/11 - 20110048724 - System for pulse-injecting fluid into a borehole
Applying pulses to liquid being injected into wells makes the ground/liquid formation more homogenous, and more penetrative. A system for automatically creating the pulses is described, in which a piston is acted upon by the pressure differential (PDAF) between the supplied accumulator pressure and the formation pressure. The changing levels...

11/19/09 - 20090283272 - Pipeless sagd system and method
A SAGD system including a string defining an axial flow channel and an annular flow pathway, a fluid access structure between the axial flow channel and the annular flow pathway, and a valve disposed within the annular flow pathway. The valve being selectively closable to selectively inhibit annular flow in...

08/06/09 - 20090194289 - Water sensitive adaptive inflow control using cavitations to actuate a valve
An apparatus for controlling fluid flow between a wellbore tubular and a wellbore annulus includes a passage between a bore of the wellbore tubular and the wellbore annulus. The passage causes cavitations in a flowing fluid made up of mostly water. The cavitations activate a flow control device that controls...

05/28/09 - 20090133879 - Rotary control valve and associated actuator control system
A rotary control valve and associated actuator control system. An actuator control system comprises a rotary control valve including a generally planar face seal, and an actuator operatively connected to the rotary control valve. Another actuator control system comprises a control valve including multiple faces having multiple ports formed therein....