Abstract:
The invention relates to fluid actuator for influencing the flow along a flow surface through ejection of a fluid. By means of a like fluid actuator, a continuous flow is distributed to at least two outlet openings in order to generate fluid pulses out of these outlet openings. Control of this distribution takes place inside an interaction chamber which is supplied with fluid flow via a feed line. Into this interaction chamber there merge at least two control lines via control openings to which a respective different pressure may be applied. Depending on the pressure difference at the control openings, the flow in the interaction chamber is distributed to the individual outlet openings.
Abstract:
A molded fluidic device (20) having a power nozzle (PN1, PN2) with a width (W) and a coupling passage (21) coupling a source of fluid (22) to said power nozzle (PN1, PN2). The coupling passage (21) has a planar enlargement and a plurality of posts (24-1, 24-2...24-N) spaced across the enlargement, the spacing (S) between each post (24-1, 24-2...24-N) being less than the width (W) of the power nozzle (PN1, PN2) with the sum of spacing (S) being greater than the width (W).
Abstract:
Fluidic transducers of electrical signals from an electronic computer to accurately switch flow of a liquid to a utilization device. A liquid filled hollow channel (166 and 166') is accelerated along the flow axis thereof to produce a fluid control signal for a bistable fluidic switch element (112) with a cross-over type interaction channel (42) and a common outlet (45) to a pair of output passageways (147 and 148). In a preferred embodiment, electrical signals from an electronic computer (220) are supplied to a coil (170) centered by a spring (190 and 191) in a magnetic field, first in one direction of current flow and then in the opposite direction, to introduce bidirectional movement of the coil (170) and the hollow channel means (166 and 166') coupled thereto. The signals are preferably frequency modulated (205) (but may be pulse width modulated).
Abstract:
A device for vibrating tubing as it is inserted into a wellbore is disclosed. The device has a fluidic switch that has no moving parts. The fluidic switch is connected to a piston that oscillates back and forth in a cylinder. The piston is the only moving part. As the piston oscillates, it blocks and unblocks openings in the cylinder or other components. The movement of the piston controls the timing of the oscillation, and also generates an impulse or vibration. The vibration may reduce the friction between the tubing and the wellbore.
Abstract:
A system for treating a subterranean zone (110) includes a downhole fluid heater (120) installed in a wellbore (114). Treatment fluid, oxidant, and fuel conduits (124a, 124b, and 124c) connect fuel, oxidant and treatment fluid sources (142a, 142b, and 142c) to the downhole fluid heater (120). A downhole fuel control valve (126c) is in communication with the fuel conduit (124c) and is configured to change flow to the downhole fluid heater (120) in response to a change of pressure in a portion of the wellbore.
Abstract:
A system 100 for oscillating compressible working fluid in a wellbore 102 defined in a subterranean formation includes a fluid supply 116 and a fluid oscillator device 204. The fluid supply 116 communicates compressible working fluid into a conduit 106 disposed within the wellbore 102. The fluid oscillator device 204 is configured to reside in the wellbore 102. The fluid oscillator device 204 includes an interior surface that defines an interior volume of the fluid oscillator device 204, an inlet 310 into the interior volume, and an outlet 314 from the interior volume. The interior surface is static during operation to receive the compressible working fluid into the interior volume through the inlet 310 and to vary over time a flow rate of the compressible working fluid from the interior volume through the outlet 314.
Abstract:
A well system includes a main wellbore extending from a terranean surface toward a subterranean zone. A first lateral wellbore extends from the main wellbore into the subterranean zone. A second lateral wellbore extends from the main wellbore into the subterranean zone. A liner junction device resides in the main wellbore and has a first leg extending into the first lateral wellbore and a second leg extending downhole in the main wellbore. A treatment fluid injection string extends from in the main wellbore through the liner junction and into the first lateral wellbore and terminates in the first lateral wellbore. A seal in the first lateral wellbore seals against flow toward the main wellbore in an annulus adjacent an outer surface of the treatment fluid injection string.
Abstract:
A system 100 for oscillating compressible working fluid in a wellbore 102 defined in a subterranean formation includes a fluid supply 116 and a fluid oscillator device 204. The fluid supply 116 communicates compressible working fluid into a conduit 106 disposed within the wellbore 102. The fluid oscillator device 204 is configured to reside in the wellbore 102. The fluid oscillator device 204 includes an interior surface that defines an interior volume of the fluid oscillator device 204, an inlet 310 into the interior volume, and an outlet 314 from the interior volume. The interior surface is static during operation to receive the compressible working fluid into the interior volume through the inlet 310 and to vary over time a flow rate of the compressible working fluid from the interior volume through the outlet 314.
Abstract:
A fluid injection system for performing a thermal enhanced recovery operation includes a heated fluid generator and an energy conversion device operable to convert an energy supplied in the thermal enhanced oil recovery operation into electricity. Energy supplied into the wellbore in the thermally enhanced recovery operation is received, and at least a portion of the energy is converted into electricity downhole.
Abstract:
A fluidic oscillator includes a member having an oscillation inducting chamber (IC), at least one source of fluid (SF) under pressure, at least a pair of power nozzles (FH1, FH2) connected to the at least one source of fluid under pressure for projecting at least a pair of fluid jets into the oscillation chamber, and at least one outlet from the oscillation chamber for issuing a pulsating jet of fluid to a point of utilization or ambient. A common fluid manifold connected to said at least a pair of power nozzles. The shape of the power nozzle manifold forms one of the walls of the interaction or oscillation chamber. In some of the fluidic circuits, the length can be matched to fit existing housings. The power nozzle can have offsets which produce yaw angles in a liquid spray fan angle to the left or right depending on the direction desired. In some embodiments, the exit throat is off axis (off the central axis of the symmetry) by a small fraction to the left or right to move the leftward or rightward yaw angles in the spray. The outlet throat (BX) may be offset along the longitudinal axis by a small amount to produce a yaw angle of predetermined degree to the left or right depending on what is desired. Thus, one can construct circuits for yaw using a combination of the techniques described above which suits most applications.