Method for reducing wellbore bending

FIELD: mining.

SUBSTANCE: inner surface of the wellbore is coated with a thermionic material with up to 3 eV, that allows to align the wellbore temperature at its non-uniform heating and, hence, reduce the thermal bending in the wellbore.

EFFECT: increased reliability of the wellbore operation with the reduction of energy and material costs.

3 cl

 



 

Same patents:

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to military technology, namely the technology of production of gun barrels. The method of production of a gun barrel consists in the fact that the solid blank on the length of the barrel is cut along the horizontal axis. In each part of the blank a recess is cut for the bore, the surface of the recess is machined. The prepared surface is coated by the method of argon-arc welding in combination with the self-propagating high-temperature synthesis. The non-consumable electrode is used as tungsten-rhenium, and the filler electrode - as the electrode of compacted exothermic mixture of titanium powder with boron and/or carbon. After welding the finishing treatment of horizontal surfaces of the blanks and the surfaces of welding of recesses is carried out to the desired calibre of the barrel. Connection of the treated blank parts to each other to the barrel is carried out on the outer surface by winding with interference in layers of high-strength steel wire or ribbon, or a ribbon of carbon fibre.

EFFECT: reducing the weight of the gun, reducing the bending vibrations of the barrel, increasing the durability of the coating while maintaining high service characteristics.

4 dwg

FIELD: weapons and ammunition.

SUBSTANCE: proposed process comprises preliminary barrel etching and shot blasting. Then, first layer of nickel is applied by electrolytic process. Then, heat treatment is performed by high-temperature annealing at 600-610°C at heating and cooling rate of not over 15°C/min. Now, second layer is applied by slip process from slip composition, containing the following components in wt %: fine powder (Al, Cr, Ni, Fe) - 45-50%; chromic anhydride - 3%; surfactant - 0,2%, chromia-alumina-phosphate binder making the rest.

EFFECT: higher wear resistance, homogeneous improved chemical composition of gun barrel.

3 cl

FIELD: weapons and ammunition.

SUBSTANCE: proposed method comprises barrel boring and reaming. Then, barrel bore is subjected to mandrelling. Gun barrel is subjected to annealing with heating to 0.9-0.95 of α to γ phase transition temperature at the rate not higher than 10-15°C a minute and to finishing mandrelling. Holding in heat treatment makes 85-95 minutes while cooling is performed at the rate not over 15°C a minute.

EFFECT: higher accuracy of hits and reliability.

2 cl

FIELD: weapons and ammunition.

SUBSTANCE: barrel breech end is subjected to hardening by heat treatment and barrel is subjected to external reduction by application of detonation coating on barrel outer surface.

EFFECT: higher quality of hardening, simplified process.

FIELD: weapons and ammunition.

SUBSTANCE: when manufacturing an item, formation of a coating on an inner surface of a barrel, smooth or rifled barrel, is carried out by means of mechanical pressure from a tool in the amount of at least 2.5 N/mm2. The coating material is represented by finely dispersed powders of natural mineral materials with energy density of at least 80 kJ/cm2 or their mixtures with a process medium. As a result, the coating with thickness of at least 50 mcm is produced. In process of operation the coating of the inner surface of the barrel is recovered periodically via a number of shots determined for each type of firearms by means of a tool developing pressure of at least 2.5 N/mm2 and by using powders of natural mineral materials or their mixtures with a process medium at the ratio of 1:1.

EFFECT: on an inner surface of a firearms barrel a corrosion-resistant coating is produced, which recovers the inner surface of the barrel and increases close pattern of shooting.

2 cl, 2 ex

FIELD: weapons and ammunition.

SUBSTANCE: creation method of protective antifriction coating on inner surface of barrel channel of small-arms and artillery systems is implemented during firing by supplying protective antifriction compound contained in annular grooves of drive obturating device to "barrel - drive obturating munition device" contact area.

EFFECT: simplifying the application process of protective antifriction coating on inner surface of the barrel channel and shortening the time required for that process; providing uniform coating of similar parts of the barrel channel; improving the fire safety level on the position of arrangement of small-arms and artillery systems.

3 cl, 5 dwg

FIELD: weapons and ammunition.

SUBSTANCE: method consists in application of marking elements that indent a bullet onto an inner surface of a rifled gun barrel. The difference consists in application of marking elements on the inner surface of the rifled gun barrel by firing a bullet with previously applied marking elements.

EFFECT: definite identification of a rifled gun using a bullet with application of previously applied marking elements.

3 cl

FIELD: weapons and ammunition.

SUBSTANCE: identification system is characterised by availability of a marking element on the inner surface of a rifled barrel and a cartridge chamber of firearms. The marking element is a mixture of at least three radioactive isotopes selected from a group that contains 69Co, 55Fe, 210Pb, 63Ni and 90Sr.

EFFECT: identification of firearms is achieved both with the help of a bullet and an empty case.

FIELD: weapons and ammunition.

SUBSTANCE: method consists in application of coating to gun striker surface, which provides penetration of set of microelements into surface of case capsule during firing, determination and comparison of information signals the first one of which represents response of capsule surface after its contact with striker, and the second one from surface of case capsule, which is shot from unknown gun. As individual marks used for identification with the help of method of radioactive indicators there used are at least three radioactive isotopes chosen from the group containing 69Co, 55Fe, 210Pb, 63Ni1 and 90Sr, and thickness of coating on surface of gun striker is 3.0 to 5.0 mcm.

EFFECT: improving reliability of analysis result.

FIELD: weapons and ammunition.

SUBSTANCE: identification system is characterised by available marking element on striker surface, and mixture consisting at least of three radioactive isotopes chosen from the group containing 69Co, 55Fe, 210Pb, 63Ni and 90Sr.

EFFECT: unique specific identification of item of mass gun as per striker mark on case.

FIELD: weapon and ammunition.

SUBSTANCE: cooling system consists of two tanks - larger and smaller - with cooling emulsion connected among themselves by the pipeline through the cooling tap. The smaller tank is located inside the fire control handle in the lower part of which the drain plug is located. In the smaller tank the cylinder with holes, the piston and the rubber ball inside the piston is located. The return spring of the piston is located around it in its top part above the small tank. The pipeline the top end of which is laid into the stock cartridge chamber is connected to the lower part of the cylinder. On the pipeline near the trigger the tap with a guidon connected by rod to the lower end of the trigger is installed. In case of use of a folding butt both tanks are connected with a flexible hose.

EFFECT: improving cooling efficiency of gun barrels in submachine guns, auto-machine guns, heavy-calibre machine guns and automatic cannons.

2 cl, 2 dwg

FIELD: weapons and ammunition.

SUBSTANCE: invention refers to military equipment. A gun barrel cooling system has a barrel and a bolt. In addition, a piston compressor, either one-pass or two-pass, is installed, the piston-rod of which is connected in a movable manner with one of its ends to the bolt or to a bolt, and with its other end to a piston by means of a pin, and a receiver is connected to an outlet valve with the compressor cylinder; the receiver air line is directed to the barrel channel cartridge chamber.

EFFECT: improving cooling efficiency of gun barrels in submachine guns, auto-machine guns, heavy-calibre machine guns and automatic cannons.

1 dwg

FIELD: weapons and ammunition.

SUBSTANCE: method for removing explosive gas from inhabited compartments of military tracked vehicles involves creation of air overpressure with a filtration ventilation plant and withdrawal of the air containing carbon monoxide from inhabited compartments through non-densities in the tank body. When an electric trigger of a coaxial machine gun (a gas source) is being pressed, a signal is supplied via electric wires through a time relay to an electric motor with an impeller, by putting it into operation. At rotation of the motor impeller, air underpressure is created through a one-sided valve in the isolated volume, where the coaxial machine gun (a gas source) is located. The air saturated with explosive gas is sucked out and gases are removed under pressure via a pipeline from isolated volume and inhabited compartments. Isolated volume is made from polymer or rubber-coated fabric or metal.

EFFECT: reduction of degree of content of explosive gas in inhabited compartments of tracked vehicles.

The invention relates to the field of military equipment and is aimed at improving an existing small arms, such as General purpose machine guns

FIELD: weapons and ammunition.

SUBSTANCE: method for removing explosive gas from inhabited compartments of military tracked vehicles involves creation of air overpressure with a filtration ventilation plant and withdrawal of the air containing carbon monoxide from inhabited compartments through non-densities in the tank body. When an electric trigger of a coaxial machine gun (a gas source) is being pressed, a signal is supplied via electric wires through a time relay to an electric motor with an impeller, by putting it into operation. At rotation of the motor impeller, air underpressure is created through a one-sided valve in the isolated volume, where the coaxial machine gun (a gas source) is located. The air saturated with explosive gas is sucked out and gases are removed under pressure via a pipeline from isolated volume and inhabited compartments. Isolated volume is made from polymer or rubber-coated fabric or metal.

EFFECT: reduction of degree of content of explosive gas in inhabited compartments of tracked vehicles.

FIELD: weapons and ammunition.

SUBSTANCE: invention refers to military equipment. A gun barrel cooling system has a barrel and a bolt. In addition, a piston compressor, either one-pass or two-pass, is installed, the piston-rod of which is connected in a movable manner with one of its ends to the bolt or to a bolt, and with its other end to a piston by means of a pin, and a receiver is connected to an outlet valve with the compressor cylinder; the receiver air line is directed to the barrel channel cartridge chamber.

EFFECT: improving cooling efficiency of gun barrels in submachine guns, auto-machine guns, heavy-calibre machine guns and automatic cannons.

1 dwg

FIELD: weapon and ammunition.

SUBSTANCE: cooling system consists of two tanks - larger and smaller - with cooling emulsion connected among themselves by the pipeline through the cooling tap. The smaller tank is located inside the fire control handle in the lower part of which the drain plug is located. In the smaller tank the cylinder with holes, the piston and the rubber ball inside the piston is located. The return spring of the piston is located around it in its top part above the small tank. The pipeline the top end of which is laid into the stock cartridge chamber is connected to the lower part of the cylinder. On the pipeline near the trigger the tap with a guidon connected by rod to the lower end of the trigger is installed. In case of use of a folding butt both tanks are connected with a flexible hose.

EFFECT: improving cooling efficiency of gun barrels in submachine guns, auto-machine guns, heavy-calibre machine guns and automatic cannons.

2 cl, 2 dwg

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to weapons, namely to devices for cooling of artillery barrels. Cooling device of artillery barrels arranged in shaft between projectile and propellant charge. Device has possibility of formation of thin sublimating cooling coating on inner surface of barrel during firing.

EFFECT: technical result consists in creation of effective cooling system of artillery barrel without making significant changes in its design.

6 cl, 3 dwg

FIELD: mining.

SUBSTANCE: inner surface of the wellbore is coated with a thermionic material with up to 3 eV, that allows to align the wellbore temperature at its non-uniform heating and, hence, reduce the thermal bending in the wellbore.

EFFECT: increased reliability of the wellbore operation with the reduction of energy and material costs.

3 cl

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to the field of development and fabrication of custom made firearms and may be used for the identification of rifled barrels of small arms that are manufactured in small lots. A method consists in applying a coating onto the inner surface of rifled arms barrels and cartridge chambers. The coating provides penetration of a set of microelements into the lateral surface of a bullet while it passes through the barrel in the course of firing and identification of the arms using neutron activation analysis of the bullet and cartridge case surfaces. Moreover, the applied coating contains three metals with their radioactive isotopes half-life period not less than 5 days.

EFFECT: providing unambiguous indentification of rifled weapons.

2 cl

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