FIELD: polymer fibers. ^ SUBSTANCE: invention relates to technology of producing high-quality polyester fibers with modified section characterized by satisfactory color tone and excellent moldability and suitable for textile industry. Polyester fibers characterized by deformed section are prepared from polyester polymer. Polymer is prepared via polycondensation of aromatic dicarboxylic acid ester ...

FIELD: polymer fibers. ^ SUBSTANCE: invention relates to technology of producing high-quality mixed yarns constituted by polyester fibers having different degrees of shrinkage and characterized by good color tone and lack of napping, which allow the yarns to be applied in textile industry. Ester used to produce yarn is prepared by using catalyst comprising, in the first embodiment of invention, mi...

FIELD: well drilling and operation, particularly to connect power source to power consumer, namely to downhole instrument. ^ SUBSTANCE: connector comprises generator shaft and downhole instrument case connected with each other. Bush, thrust washer, rigid insulated washer, resilient sleeve shaped as truncated cone are concentrically arranged inside the shaft. The resilient sleeve is provided with c...

FIELD: well survey, particularly geothermal well survey. ^ SUBSTANCE: temperature probe assembly comprises temperature sensors installed in upper or lower assembly part and uniformly distributed around a circle having radius r>R3/2, where R3 is probe assembly radius. Circle center coincides with probe assembly axis. Assembly also has safety lamp made as a pipe with orifices. Summary orifice area i...

FIELD: wind power engineering. ^ SUBSTANCE: according to invention, in stator of wind electric generator containing coil, magnetic circuits, magnetic field sources, two rotors-windwheels installed for magnetic contact with magnetic circuits, stator is furnished with two pairs of magnetic circuits, one pair of which has straight and the other, L-shaped end pieces. One L-shaped end piece and one str...

FIELD: mechanical engineering. ^ SUBSTANCE: differential mechanism comprises housing (1), parallel shafts (5) and (4), screw (2), and nut (3). Nut (3) cooperates with screw (2) through the kinematic link composed of three pairs of gearing wheels. Screw (2) can move along the axis. The number of teeth of conical wheel of first shaft (5) of electric motor (6) is determined by the number of teeth cho...

FIELD: electrical engineering. ^ SUBSTANCE: proposed method for cycling lead-acid batteries includes following steps: withdrawal of first electrolyte of desired concentration and temperature from first tank; distribution of mentioned first electrolyte within battery; continuous circulation of mentioned first electrolyte at predetermined and actually constant concentration and temperature for prede...

The invention relates to the compounds of formula I, their preparation and the pharmaceutical compositions containing the compounds. The invention also relates to the use of the compounds of formula I in preparing medicines, which can treat sexual dysfunction of animals including human (male and female), especially erectile dysfunction of male and the diseases in which the function of phospholipas...

Methods and systems are provided for downhole analysis of formation fluids by deriving fluid properties and associated uncertainty in the predicted fluid properties based on downhole data, and generating answer products of interest based on differences in the fluid properties. Measured data are used to compute levels of contamination in downhole fluids using an oil-base mud contamination monitorin...

FIELD: electric generators adapted to supply power to downhole apparatuses, namely to pressure compensators included in generator lubrication systems. ^ SUBSTANCE: pressure compensator comprises upper cowl, body, spring-loaded pressure compensator piston having rod connected to end thereof, filling device closed with lid. To prevent pressure compensator piston jamming the piston is centered in pre...

A submersible pumping system includes a submersible pump; a gauge disposed proximate the submersible pump; a Stirling cooler disposed proximate the gauge, wherein the Stirling cooler has a cold end configured to remove heat from the gauge and a hot end configured to dissipate heat; and an energy source configured to power the submersible pumping system.

L'invention concerne un procédé de modification d'un substrat inorganique visant à lui conférer des propriétés anti-microbiennes, ledit procédé consistant à greffer en une ou plusieurs étapes sur une surface dudit substrat des groupements ayant des propriétés anti-microbiennes intrinsèques ou des groupements capables de libérer des espèces ayant des propriétés anti-microbiennes. Le procédé est car...

FIELD: systems for cooling articles arranged in loading compartment of furnace chamber of apparatus for hot isostatic pressing. ^ SUBSTANCE: in order to provide uniform cooling of loading compartment of furnace chamber, hot pressurized working fluid is discharged out of loading compartment and cold working fluid is fed under pressure in such a way that it flows downwards through discharged pressur...

A tire production method comprising a step of sticking a chafer rubber (21) onto a substrate (15) by winding a rubber ribbon spirally, a step of sticking a sidewall rubber (22) of first color to a position on the substrate (15) spaced from the position where the chafer rubber is stuck by winding a rubber ribbon spirally, a step of sticking a sidewall rubber (23) of second color between the chafer ...

A security method comprises inputting into a database on a computer system ( 2 ) data as to a forecast of transfer relative to the database, and inputting into the database data as to actual transfers relative to the database, the computer system taking appropriate action in the event that the transfers are not in accordance with the forecast. Apparatus for performing the security method comprises...

A method for certification of a political website in accordance with one embodiment of the invention determines a candidate name and office (210). The method confirms that the determined name is registered to run for the office (220). The method confirms that the URL associated with the website is controlled by the determined name (230).

A well treatment tool, comprising: a tool body; a clamping system for locating the tool body in a well; a positioning system for orienting the tool body in the well axially and azimuthally; a reservoir system comprising at least one fluid reservoir in the tool body; and a pumping system for pumping fluid from the reservoir to a region of the well to be treated. The treatment tool can also re-estab...

An apparatus and method for processing different feeds in a fluid catalytic crackingunit are disclosed which result in improved yields of C3, C4and gasoline range hydrocarbons as compared to conventional systems. The processcomprises injecting a main hydrocarbon feed into a catalyst-containing riserreactor through a plurality of main feed injectors, and injecting a light hydrocarbonfeed into the r...

Expandable polystyrene foam compositions having flame retardant properties,flame retardant expanded polystyrene foams, methods of making such foams, andproducts comprising such compositions and foams are provided. A flame-retardedexpanded polystyrene foam contains a flame retardant compound having the structure:(I) wherein R is H or CH3.; Se describen las composiciones de espuma de poliestireno ex...