68results about How to "Reduce fluid velocity" patented technology

A catheter tip designed to reduce the outflow velocity and/or directional momentum of fluid being infused by a catheter having such a tip. In one variation, a plurality of channels is provided at the distal portion of the catheter to increase the outflow cross-sectional area. In another variation, the diameter of the catheter at its distal portion where the fluid exits is increased. In yet another variation, a bullet-shaped nose is implemented which may decrease turbulence at the distal end of catheter tip. The low velocity outflow catheter tip may also be implemented on a dual lumen catheter, such as a hemodialysis catheter, to reduce recirculation rate. Various device configurations and methods for such implementations are also disclosed.

A flow control element comprises a cylindrical element body having a bore formed therethrough. The cylindrical element body may include inner and outer peripheral surfaces and define a plurality of tortuous flow passages which extend between the inner and outer peripheral surfaces. The flow control element is formed as a unitary structure wherein the flow passages are oriented along at least two axes. The flow control may be formed by direct to metal laser sintering wherein successive layers of powdered metallic material are solidified by applying laser energy to the selected portions until the flow element is formed as a unitary structure with a plurality of flow passages extending therethrough. The laser energy is selectively applied to the powdered metallic material according to a computer model of the flow control element.

A manifold for distribution of well servicing fluids, such as fracturing fluids, to a plurality of wells. The manifold has a single bore through which the fluid flows and a plurality of outlets which are connected to the bore. Two or more of the outlets deliver the fluid to each wellhead. Valves are positioned in each of the outlets so that each of the wellheads can be independently isolated from the fluids for selecting which of the wells will be serviced at any given time. A total cross-sectional area of the outlets feeding each of the wells is greater than the cross-sectional area of the bore which results in a velocity reduction in the outlets which reduces erosion in the manifold and the downstream components Systems are described using prior art manifolds or manifolds according to embodiments of the invention for use specifically with fracturing fluids containing proppant. Proppant can be delivered to the fracturing fluid through the manifold, directly to the wellhead or both, to reduce erosion. Use of a manifold according to embodiments of the invention, in combination with the systems described, are particularly useful for reducing erosion with proppant-laden fracturing fluids.

In a system for optimizing natural gas production in response to real-time variations in wellbore parameters, a PLC or other wellsite intelligence technology is used to monitor liquid and gas production from the wellbore under friction-loaded conditions. Using baseline production data obtained during production tests, the PLC determines and initiates the appropriate operating mode for the wellbore to optimize a selected production criterion to suit measured wellbore parameters. The operating mode either a continuous clean-out mode, in which gas is continuously injected into the wellbore to control liquid loading, or an intermittent clean-out, in which liquid loading is regulated by intermittent gas injection. In preferred embodiments, the system uses bladder-type control valves having upstream and downstream solenoids, to control production tubing flow rate within a range between upper and lower set points.

The invention relates to heat exchange equipment and discloses a plate-fin heat exchanger. The plate-fin heat exchanger comprises a shell, a fixing part arranged on the shell and used for fixing the plate-fin heat exchanger, a heat exchange core and an end socket cavity welded at two ends of the heat exchange core, wherein the end socket cavity is welded with an inlet pipe and an outlet pipe; the heat exchange core comprises outside clapboards, inside clapboards, an inside fin, an inside seal, an outside fin, an outside seal and bilateral side plates; the outside fin and the outside seal arranged between the outside clapboards forms a cold passageway ; the inside fin and the inside seal arranged between the inside clapboards forms a hot passageway; the end socket cavity is communicated with the hot passageway; the cold passageway and the hot passageway are arranged in a layered crossing way; the inside of the end socket cavity is provided with a punching baffle, and holes with diameters from small to large are distributed along a central axis of the punching baffle from inside to outside. The structure improves the uniformity of flow velocity distribution of outlet cross-section of the whole plate and improves the heat exchange performance of the heat exchanger.

A method of completing a subterranean well having a well casing extending though an earth formation is provided, including the steps of: suspending an apparatus at a selected depth within the well casing; creating an unbalanced condition within the well casing; forming a lateral bore in the formation by jetting a pressurized fluid from the apparatus through a casing opening in the well casing and into the earth formation; receiving in the well casing through the casing opening fluid and formation debris created from forming the lateral bore; and lifting the fluid and formation debris received by the well casing upwardly through the well casing to the well surface.

The invention describes a laser sensor or laser sensor module (100) using self-mixing interference for particle density detection, a related method of particle density detection and a corresponding computer program product. The invention further relates to devices comprising such a laser sensor or laser sensor module. It is a basic idea of the present invention to detect particles by means of self-mixing interference signals and determine a corresponding particle density. In addition at least a first parameter related to at least one velocity component of a velocity vector of the particles is determined in order to correct the particle density if there is the relative movement between a detection volume and the particles. Such a relative movement may for example be related to a velocity of a fluid transporting the particles (e.g. wind speed). Furthermore, it is possible to determine at least one velocity component of the velocity of the particles based on the self-mixing interference signals.

A heat exchanger device having a plurality of substantially parallel tubes. Each tube has an outer diameter which is less than or equal to one millimeter and further includes a first end portion and a second end portion. A first manifold forms an inlet for the first fluid and further forms a plurality of first openings, whereby each of the first end portions of the parallel tubes is attached in a sealed manner to the first manifold so that each tube is in fluid communication with a respective one of the first openings. A second manifold spaced from and opposing the first manifold forms an outlet for the first fluid and further forms a plurality of second openings, whereby each of the second end portions of the parallel tubes is attached in a sealed manner to the second manifold so that each tube is in fluid communication with a respective one of the second openings. The plurality of substantially parallel tubes are laterally disposed relative to one another so that they form at least one corrugated pattern when viewed in an imaginary plane which intersects and is perpendicular to the longitudinal axes of the tubes.

In a scroll shape of a centrifugal compressor, an enlargement rate of a ratio A/R of a cross-sectional area A of a scroll portion 12 to a radius R from an axis L1 of a compressor impeller 3 to a centroid P₀ of a cross section of the scroll portion is reduced from a winding start to a winding end of the scroll portion.

The invention discloses a cooperative control method for a tandem double-wind-wheel wind turbine generator set, and belongs to the technical field of wind power control. The problems that an existing tandem double-wind-wheel wind turbine generator set is not decoupled in operation and low in operation efficiency are solved. The tandem double-wind-wheel wind turbine generator set front and back wind wheel cooperative control strategy with transmission decoupling is provided, firstly, after operation intervals of front and back wind wheels are divided and the optimal output value is determined, the maximum overall output of the wind turbine generator set serves as the target, and output cooperative control over the front wind wheel and the rear wind wheel is carried out by adjusting the rotating speeds and pitch angles of the front wind wheel and the rear wind wheel. According to the cooperative control method for the tandem double-wind-wheel wind turbine generator set, the highest overall efficiency and the lowest load of the unit are taken as control targets, the front and rear wind wheels cooperate with each other, so that the unit is higher in efficiency, wider in high-efficiency area and more friendly in grid connection, the kilowatt-hour cost of the wind turbine generator set can be greatly reduced, and the grid connection characteristic of the unit is improved.

The present invention relates to a three-phase separator (33) for separating off from a fluid gas and particles contained therein, comprising at least one pair of two gas collection caps (1, 2) extending in a horizontal longitudinal direction (L) and each having a plate section (3, 4). The plate sections converge in the downward direction. At the bottom ends the plate sections leave an inlet passage (7), elongated in the longitudinal direction, for the fluid containing particles and an outlet passage (8), elongated in the longitudinal direction, for settled particles. A discharge opening (9) for fluid, opening into the settling chamber, is provided at a level higher than the inlet and outlet passages. The inlet passage (7) and the outlet passage (8) are located in the extension of one another, viewed in the longitudinal direction. The surface area of the inlet passage is preferably greater than the surface area of the outlet passage. The discharge opening is provided level with or beyond the outlet passage.

The invention discloses a device for testing multi-phase flow and heat transfer characteristics of a supercritical water circulating fluidized bed, which consists of an experimental section, a circulating system and a testing system, and comprises a lifting pipe, a cyclone separator, a filter, a feeding bin, a vertical pipe, an L-shaped material return valve, a circulating water tank, a first plunger pump, a second plunger pump, a damping buffer, a flowmeter, a first heat regenerator, a second heat regenerator, a first heater, a second heater, a back pressure valve, a cooling water tank, a cooling water pump, a first cooler, a second cooler, an open cooling tower, a plurality of regulating valves and other parts, and a plurality of K-type thermocouples, pressure difference sensors, capacitance probes and other testing devices. The device for testing multi-phase flow and heat transfer characteristics of the supercritical water circulating fluidized bed lays a foundation for research onthe multi-phase flow and heat transfer characteristics of the supercritical water circulating fluidized bed reactor, establishment of design theory, optimization of operation conditions and popularization of application.

A system for separating suspended and dissolved materials in a fluid having a pH offset from neutral is disclosed. It employs a plurality of stacked, generally flat treatment beds each having a surface angled downward for receiving the fluid. Since the fluid is spread over a large surface, its velocity slows causing suspended materials to drop out of the fluid as a sludge. A pH correction device adds an agent to the flowing fluid which will bring the pH closer to neutral thereby causing said dissolved materials to precipitate out and into the sludge. Portions of the beds may be isolated and the sludge collected resulting in a fluid having substantially less suspended and dissolved materials at a pH and temperature closer to normal. This invention is especially useful for remediating acid mine drainage.

The invention discloses a soil leaching remediation reduction system and a construction method thereof, and belongs to the technical field of soil remediation. The soil leaching remediation reductionsystem comprises a feeding primary grading unit, a high-pressure jet separation unit, a secondary grading unit, a slurry settling concentration unit, a filter pressing unit, a sewage treatment unit, adust tail gas treatment unit and an instrument electrical control unit which are connected in sequence. According to the system, the grading quantity and the equipment quantity are greatly reduced, and for soil treatment of small-sized polluted sites, the whole system can adopt modularized container equipment or skid-mounted equipment which is convenient to move, so that the on-site constructioncost can be greatly reduced, the construction period can be greatly shortened, and the remediation efficiency is improved. The system is simple and ingenious in structure, easy and convenient to operate, low in equipment investment cost, small in occupied area, particularly suitable for remediation projects of small contaminated sites, capable of achieving multi-equipment parallel operation, suitable for treatment of medium and large sites, wide in application range, good in effect and wider in application prospect.

A flow back separator including a housing including a bore housing for communicating with a solid collection chamber, an inlet port for receiving formation fluid flow, and a helical member disposed within the housing bore for directing formation fluid flow received through the inlet port along a helical path wherein solids within the formation fluid flow are forced towards a wall of the housing bore under centrifugal force.

A rotor blade includes an elongated body having a leading edge, a trailing edge, a proximal end, and a distal end; a fluid inlet; a fluid outlet arranged near the distal end of the elongated body; and a fluid duct contained within the elongated body, the fluid duct being substantially open between the fluid inlet and the fluid outlet, the fluid duct having a shape to reduce fluid velocities C generated by the interaction of fluid exiting the fluid duct and external fluid at the distal end.

The invention relates to the field of impellers and discloses a high-lift pump impeller for an electric automobile. The high-lift pump impeller for the electric automobile comprises an impeller body (2) installed in a pump body, the impeller body (2) comprises a panel (3) and blades (4) installed on the panel (3), the blades (4) comprise main blade bodies (41) and auxiliary blade bodies (42), themain blade bodies (41) and the auxiliary blade bodies (42) are circumferentially arranged round the central axis of the panel (3), and the length of the main blade bodies (41) is larger than that of the auxiliary blade bodies (42). According to the high-lift pump impeller for the electric automobile, the two kinds of blade bodies are arranged, so that the flow area between the blades is increased;since bending of the blades is reduced and jamming of the blades is also reduced, the circulation area of the blades is increased; and the inlet flow speed is reduced, so that the anti-cavitation performance of the impeller is improved.