Return valve

FIELD: machine engineering.

SUBSTANCE: valve comprises a body with a central threaded hole, the body includes a cage, a seat and a spring-loaded shutoff element interacting with the seat which is movably mounted in the valve cage. In the cage there is a cavity and a bottom with holes therein, in the cage cavity there is a spring for pressing a locking element to the seat, wherein the cage in the longitudinal section has a bowl shape formed by a first cylindrical portion and a second elongated cylindrical portion of a smaller diameter. In said cage portions there is the locking element made in the form of a rod with a semicircular head interacting with the seat. The seat is made with an outer thread and screwed into the central threaded body hole, the seat end is pressed to the end face of the first cylindrical cage portion, the rod end of the locking element is located inside the spring, wherein the body, the rod and the cage are made with projections, the end of the cylindrical cage portion is pressed to the body projection. A spring is between the rod and the cage projections, one spring end rests against the cage projection, and the other spring end rests against the rod projection.

EFFECT: increased efficiency of the return valve.

3 cl, 1 dwg

 



 

Same patents:

FIELD: machine building.

SUBSTANCE: locking element is made in form of the spherical locking element pressed to the seat with possibility of its movement is equipped by the support elements made in form of the curvilinear legs. The supporting elements are connected with the spherical locking element and support made, for example, in form of the ring with hole for the liquid passage. The locking element is made in form of one part out of viscoelastic, wearproof material, for example, polyurethane.

EFFECT: improved valve operating reliability.

6 cl, 3 dwg

Automatic valve // 2535466

FIELD: machine building.

SUBSTANCE: invention relates to design of suction and discharge valves of piston compressors. The automatic valve contains seat, lift limiter and stop device under them pressed to the seat by means of at least one pair of the permanent magnets which like poles look on each other. One magnet of the pair is movable and is installed with the possibility of movement in slot of the lift limiter against the second fixed magnet . The lift limiter is out of two parts with jointing plane passing between the magnets of the pair. The slot with movable magnet is located in the part nearest to the seat. The fixed magnet is single-piece, and is installed in second part of the lift limiter. Between parts of the lift limiter in zone of the permanent magnets there is cavity connected with its through channels.

EFFECT: invention increases reparability and reliability of the valve work in case of the environment pollution.

3 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: wedge valve gate unit comprises a casing with inlet and outlet branch pipes turned to each other by bores, where seats sealed hermetically and fixed in respect to the casing are set, are interacting with the responsive sealing fields of disks which are controlled by ridges of curved shape which are installed in the hole of a shell connected to a spindle. The hole in the shell on the outlet branch pipe side is blind, the shell on the inlet branch pipe side is with continuous curvilinear surface interacting with the responsive outer surface of a pivoted lever at closing of the gate. A niche is provided on the inner side of the lever and a disk is movably and rotationally installed in the niche.

EFFECT: creation of full passage gate unit of a wedge valve with two functions, namely, blocking of conveyed medium flow and prevention of return flow of the conveyed medium at the open wedge valve gate unit.

3 cl, 3 dwg

Valve // 2489626

FIELD: machine building.

SUBSTANCE: valve includes a body with inlet and outlet branch pipes, an element with a sleeve on ribs and a seat, which is installed in the housing, a spring-loaded gate with a seal, which contacts the seat and is made in the form of a cap with a central groove, which interacts with the sleeve through inner diameter of the groove. The body consists of two parts of body 1 and inlet body 2, which are rigidly attached to each other. The sleeve on ribs and the seat are integral parts of body 1. Piston 4 is installed on end part of the sleeve. The central groove in the gate is stepped. Tight cover plate 8 is installed on end part of the central groove of the gate. Outer diameter of piston 4 interacts with a blind central groove of the gate of larger diameter.

EFFECT: invention allows enlarging the possibility of using the valve in parts of machine-building industry and simplifying the design.

5 cl, 1 dwg

Automatic valve // 2478857

FIELD: machine building.

SUBSTANCE: automatic valve includes a seat, a lift limiter and shutoff elements arranged between them. Each shutoff element is pressed to the seat by means of at least one pair of constant magnets facing each other with their similar poles. Magnets are fixed in shells-holders from non-magnetic material, which are provided with longitudinal flats on external cylindrical surface. Shells-holders with magnets are installed so that they can be mutually moved in the seat of the lift limiter having an axial drain hole. At the bottom of lower shell, which faces the above hole, there formed are radially directed grooves deepening from the centre to the periphery and continued to flats on cylindrical surface.

EFFECT: improving operating reliability of the valve under conditions of polluted and humidified working fluid.

5 cl, 7 dwg

FIELD: machine building.

SUBSTANCE: minimum pressure valve is equipped with a casing with an inlet opening and an outlet opening, which are connected via an internal system of channels. The above channel system is provided with a moving valve body. The above moving housing is borne against the support surface around the inlet opening in closed position by means of a spring and thus shuts off the inlet opening. When in open position, the above moving housing is located at the distance from the support surface so that the inlet opening is connected to the outlet opening through the channel system. The valve body is installed in the valve casing. The above casing is made in the form of a cylindrical casing forming a cylindrical chamber, which is closed on one end with an end wall and open on the other end. The casing is rigidly fixed in the above channel system and forms together with the valve body a closed inner cavity connected to the inlet opening through a channel.

EFFECT: spring with lower rigidity is used, owing to which the range of pressures, in which the valve body moves, is reduced.

14 cl, 3 dwg

Check valve // 2463506

FIELD: machine building.

SUBSTANCE: check valve comprises body with connection branch pipes for main component, mainly, oil and dischargeable component, mainly, mix of oil and gas. Shut off element consists of fixed and moving parts interacting over common equidistance surface and is made up of, preferably, of seat with spring-loaded disc arranged in inner unit case. Said inner block represents a shaped solid of revolution, preferably, a cylinder, arranged inside valve body along dischargeable component line. Shutoff element lengthwise axis is located perpendicular to dischargeable element branch pipe axis. Chamber communicated via channels with valve body inner chamber is arranged above valve disc. Said channels are open upstream. Cover is fitted in valve body mating part to lock inner unit with shutoff element. Said inner unit is heat-isolated from valve body by nonmetallic ring seals. Note here that gas chamber is arranged between said inner unit and valve body. Inner unit case face opposite the cover accommodates tie rod, mainly, cylindrical. One end of said tie rod interacts with inner unit case while its opposite shaped end interacts with valve body cover. Valve body cover represents hollow cylinder with one closed end face to make closed gas chamber inside said cover, between cover end face and inner unit end face. Clearance is provided between cover thrust surface and inner unit face.

EFFECT: higher reliability.

2 dwg

Check valve // 2463439

FIELD: machine building.

SUBSTANCE: check valve comprises body and branch pipes for primary and dischargeable components. Shutoff element consists of fixed and moving parts interacting over common equidistant surface and is arranged inside valve body along dischargeable component line. Shutoff element is made up of seat with spring-loaded disc and arranged inside inner unit case. Said inner block represents a shaped solid of revolution, preferably, a cylinder, arranged inside valve body along dischargeable component line. Shutoff element lengthwise axis is located perpendicular to dischargeable element branch pipe axis. Chamber communicated via channels with valve body inner chamber is arranged above valve disc. Said channels are open upstream. Cover is fitted in valve body mating part to lock inner unit with shutoff element. Said inner unit is heat-isolated from valve body by nonmetallic ring seals. Note here that gas chamber is arranged between said inner unit and valve body. Valve body cover represents hollow cylinder with one closed end face to make closed gas chamber inside said cover, between cover end face and inner unit end face.

EFFECT: higher reliability.

2 dwg

FIELD: oil-and-gas production.

SUBSTANCE: proposed method consists in forcing warm extracted medium, for example, reservoir fluid with temperature of 15-25 over outer shaped surface of intenral unit accommodating shutoff valve. Shut off element consists of fixed and moving parts interacting over common equidistance surface and is made up of, preferably, of seat with spring-loaded disc arranged in inner unit case. Valve body has inlet branch pipe and hydrocarbon product discharge branch pipe and cover arranged on body rear. In keeping required temperature of inner unit, it is isolated from valve body by nonmetallic, preferably, rubber mix ring seals. Note here that, additionally, heat losses are reduced by making air chamber between inner unit face and valve body cover.

EFFECT: higher reliability of valve operation.

2 dwg

Check valve // 2463437

FIELD: machine building.

SUBSTANCE: check valve comprises body and branch pipes for primary and dischargeable components. Shutoff element consists of fixed and moving parts interacting over common equidistant surface and is arranged inside valve body along dischargeable component line. Chamber is arranged above valve disc communicated with valve body inner chamber. Note here that channels open downstream. Cover is fitted in valve body mating part to lock inner unit with shutoff element. Said inner unit is heat-isolated from valve body by nonmetallic ring seals. Note here that gas chamber is arranged between said inner unit and valve body. Link mat be arranged inner unit case end facing the cover to interact with said case by its one end and by opposite end, preferably, shaped one, with valve body cover inner surface made up of hollow cylinder with one closed end. Clearance is provided for between cover thrust surface and inner unit end face. Said valve body cover inner surface made up of hollow cylinder with one closed end interacts with inner unit case end face.

EFFECT: higher reliability.

3 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: device comprises a pipe string run in to the well, a packer with a flow shutoff mounted in it. The packer is made as a hollow body with the upper row of openings placed above the sealing element in the packer. Inside the hollow body there is a pipe concentric to its axis and fixed rigidly to the pipe string from top and to the piston from bellow. The pipe with piston may be moved axially in regard to the hollow case of the flow shutoff. In the hollow body below the sealing element of the packer there is the lower row of openings. The piston is made hollow and plugged from below. Opposite the upper and lower rows of openings in the hollow body the piston is equipped with inner cylindrical sample capture and a row of feedthrough openings. In the hollow body above the upper row of radial openings there is a cam slot in the form of longitudinal groove and three transversal grooves. The transversal grooves are made from the upper, medium and lower parts of the lower part of the longitudinal grove. In cam slot of the hollow body there is a guide pin installed so that it may be moved axially and transversally. It is fixed rigidly in the piston above its upper inner circular sample capture. When the guide pin is placed in the transversal groove made of the medium part of the longitudinal groove, the device is designed to connect inner space of the pipe through a row of feedthrough openings of the piston, inner cylindrical sample capture, the upper and lower rows of openings with over-packer and below-packer space of the well. When the guide pin is placed in the transversal groove made of the upper part of the longitudinal groove, the device is designed to connect inner space of the pipe through a row of feedthrough openings of the piston, inner cylindrical sample capture, the upper row of openings with over-packer space of the well. The lower row of openings in the hollow body is sealed in tight-proof way by the piston. When the guide pin is placed in the transversal groove made of the lower part of the longitudinal groove, the device is designed to connect inner space of the pipe through a row of feedthrough openings of the piston, inner cylindrical sample capture, the lower row of openings with below-packer space of the well. At that the upper row of openings in the hollow body is sealed in tight-proof way by the piston.

EFFECT: simplified design of the device, improved reliability of its operation and expanded functionality.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil and gas producing industry and can be used for annular gas bypassing to the flow string in wells operated by sucker-rod pump units. Task of the invention is to perfect design of the downhole device for annular gas bypassing in order to improve operational efficiency of the well sucker-rod pumping equipment notwithstanding temperature conditions of the well operation and pressure of annular gas. The device is placed in the well annular space over the well fluid level in the flow string collar. The device comprises a return valve and a radial hydraulic channel. In the collar lower part there is a radial hydraulic channel interconnected to the well annular space at the one side through the return valve and to the flow string cavity at the other side through a jet device. At that axes of the radial hydraulic channel and the jet device are crossed in the nozzle area of the latter. Besides the device comprises a flow string with a whipstock for gas-fluid flow in it. The whipstock is made as a bushing capable to be fixed in the flow string collar. Length of the whipstock for gas-fluid flow is less than distance between receipt and discharge of the jet device. Axes of the radial hydraulic channel and the jet device are perpendicular. Fixation of the whipstock for gas-liquid flow in the flow string collar may be implemented by equipping the flow string collar with an inner groove and the whipstock for gas-liquid flow with a ring holder.

EFFECT: usage of device allows reducing pressure of annular gas notwithstanding temperature and pressure conditions thus increasing life between overhauls for the sucker-rod pumping equipment; besides, this device allows reducing pump-setting depth for the sucker-rod pump due to increase of fluid level over the pump thus reducing consumption of the flow string and pump rods and increasing life between overhauls for the units.

3 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: device comprises well with horizontal section extending over bed with different permeability zones, string with cable, electric valves, pressure and temperature transducers, one or several packers tightly isolating the zones of different permeability. Said transducers are connected with metering assy at well mouth while valves are connected with control unit. Note here that pump for product extraction via annulus is arranged above said valves. Outlets of valves are connected with pipe inner space while inlets, apart from the valve at valve bottom, are connected with annulus. Every valve is composed of encase motor with reduction gear with shaft articulated with pusher. Inner space and case of the latter are filled with lubricant. Ball valve can tightly interact with its seat while cup with inlet channels is arranged under said seat. Note here that inlet of the valve nearby the mouth is communicated with annulus. Ball of every valve is connected by basket with pusher to be displaced therewith. The valves are arranged opposite the well appropriate zone for communication by inlet channels therewith. Inlet channels of every valve are provided with appropriate temperature and pressure transducers+. Valve cups are tightly and rigidly connected with the valve body and provided, apart from the valve nearby the bottom, with lengthwise overflow channels. Body of every valve apart from that nearby the bottom is provided with adapter bush to revolve and to be fixed at transportation position. Pusher inner cavity houses the floating piston and is connected by rod end with technological channels to pipe inner space while head end is connected with space above said pusher.

EFFECT: enhanced performances, independent extraction of products from every interval.

5 dwg

Well testing device // 2545234

FIELD: oil and gas industry.

SUBSTANCE: invention is related to well-flow cut-off systems and may be used for leak test of pipe strings. The device comprises a plug of removable material, which is set in the well pipe for the purpose of the above testing. At that pipe walls have channels (3, 4, 8), which ensure flowing connection between cavity (70) of the well over the plug and cavity (72) below the plug. At that the device comprises a cut-off element designed to ensure continuous closure of the flowing connection. The channel is formed preferably with axial cavity/chamber (4), wherein there is a piston designed to perform readjustment by axial movement from the first position with open flowing connection through the channel to the second position wherein the connection is closed permanently and may be open again.

EFFECT: improved efficiency of the well flow cut-off at leak testing of pipe strings.

10 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: valve includes a body with the upper and lower connection threads, valve saddle fixed rigidly inside the body, thrust bush and washer with central and peripheral openings fixed in body by a locking ring, disc valve with rod passing through the central opening of washer, driving washer and spring installed between washer and driving washer. The rod of disc valve is made hollow with horizontal openings in the upper section connecting the tubing area over the valve with the area below the valve. The driving washer is a stepped one, and its lower part with less diameter forms a sliding friction couple with outer surface of the hollow valve rod. In the upper part of the driving washer with screwed cover and centralisers there are horizontal openings with diameter larger than diameter of openings in the valve rod. In the upper part of the valve rod from outside there is a locking ring and O-rings of elastic material, which are placed at both sides of horizontal openings in the valve rod.

EFFECT: improved efficiency of filter cleaning.

2 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: locking element is made in form of the spherical locking element pressed to the seat with possibility of its movement is equipped by the support elements made in form of the curvilinear legs. The supporting elements are connected with the spherical locking element and support made, for example, in form of the ring with hole for the liquid passage. The locking element is made in form of one part out of viscoelastic, wearproof material, for example, polyurethane.

EFFECT: improved valve operating reliability.

6 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: device includes a housing, a branch pipe with a central duct, openings and an nut, which is concentrically located in the housing, and a spring. The nut is installed on an outer surface of the branch pipe in its part, and the spring is installed between the nut and the housing, in which there is an internal cylindrical recess. In the lower part of the internal cylindrical recess of the housing there are radial ducts. A hollow cylindrical valve provided with an annular projection from above is rigidly attached from below to the branch pipe inserted into the housing with a possibility of restricted leak-proof downward movement of the internal cylindrical recess of the housing. The cavity of the internal cylindrical recess of the housing above the annular projection of the cylindrical valve is interconnected with openings to the central duct, and the cavity of the internal cylindrical recess under the projection is interconnected with radial ducts to the space outside the housing. There is also a replaceable sleeve and a check valve passing in an upward direction. According to the invention, the hollow cylindrical valve below the internal cylindrical recess of the housing is provided with radial openings. Below the radial openings, the cylindrical valve is provided with a replaceable sleeve with through openings from above. A blind rod is installed into the replaceable sleeve and provided from above with a radial through hole, into which a pin is installed, which is inserted in the radial openings of the hollow cylindrical valve and rigidly fixed in the housing. The blind rod has a possibility of restricted back-and-forth axial movements together with the housing relative to the replaceable sleeve with the hollow cylindrical valve with a possibility of cyclic opening and closing of through holes of the replaceable sleeve during pumping of liquid to the device.

EFFECT: possibility of increasing liquid flow rate at pulse pumping to a formation in a formation pressure maintenance system during development of oil deposits.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to mining industry and can be used at drilling and completing of wells. An insulating device for a formation fracturing plug includes a ball seat equipped with a mounting surface and a ball having a possibility of contacting to the mounting surface. The mounting surface profile is dome-shaped; the first portion of the profile has a curvature radius that corresponds to the curvature radius of the ball profile, and the second portion has a curvature radius that is larger than that of the first portion. Besides, the invention describes a fracturing plug and an insulation method of zones of a productive formation using an insulating device.

EFFECT: improvement of tightness of an insulating device.

11 cl, 49 dwg

FIELD: mining.

SUBSTANCE: group of inventions relates to mining industry and can be used in bottom-hole valve systems. The system includes a tubular column and a hollow activation ball. The tubular column is adapted for arrangement in a well and includes a seat. The activation ball is adapted for lowering to the well to be arranged in the seat. The ball includes an outer cover that forms a spherical surface. The outer cover forms a closed volume and is made from metallic material. The activation ball includes a supporting structure located on the inner surface of the outer cover.

EFFECT: improvement of efficiency of a bottom-hole tool activation system.

26 cl, 13 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: valve comprises hollow body with coupling and union threaded ends for coupling with flow string and with radial hole, hollow slide valve with radial bore and piston. Hollow slide valve is arranged off centre relative to said body and rigidly fixed at its outer surface. Radial bores of the body and slide valve are intercommunicated, hollow slide valve being provided with lateral channel. Piston is rigidly secured at rod lower part while rod upper part is provided with outer circular ledge and fitted tightly in adjusting nut for axial displacement relative to adjusting nut. Adjusting nut is screwed in hollow slide inner thread made at its top end. The piston is spring loaded downward from said nut. Fluid chamber communicated with the body inner space is made in said slide valve. Overpressure in said fluid chamber makes piston displace axially upward to communicate said chamber with the well casing annulus via the slide valve lateral channel.

EFFECT: decreased and controlled hydraulic pressure, ease of logging instrument arrangement, combination of several jobs in one lowering of tubing.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: downhole tool includes a drill bit on its lower end and a drill motor containing a casing with a rotor rotating in the rotor channel in the casing when the drill tool passes through it. The rotor has a bypass channel for bypassing some portion of the drill mud via it. The valve includes a plate of the valve, which is installed upstream of the motor and has at least one flow pass and at least one bypass passing through the same plate. At least one flow pass is hydraulically interconnected with the rotor channel for passage of the drill mud passing through it. The rotor is made so that it can be rotated in the casing. At least one bypass is selectively hydraulically interconnected with the bypass valve when the rotor is being rotated in the casing, and the bypass channel is selectively moved in a position of alignment with at least some part of at least one bypass for bypass of some part of the drill mud via it, thus generating an impact action on the hammer.

EFFECT: preventing seizures of a drill tool, reducing vibration, increasing drilling efficiency with a downhole tool so that the bit damage is prevented.

25 cl, 14 dwg

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