Wellhead equipment

FIELD: oil industry.

SUBSTANCE: invention refers to oil production, and namely to wellhead equipment. It consists of a casing head with side taps, which rests upon the pipe hanger with side taps, and the device for relieving pressure from the tube space. The device meant for relieving pressure from the tube space is a jet pump installed in the tube hanger tap. The suction of the jet pump is connected with the nozzle to the casing head cavity and to the annular space between the production casing and the flow column. The assembly for separate throttling of water and gas and for warming the flow being pumped is installed on the nozzle before the jet pump suction.

EFFECT: providing gas extraction and pressure relief from the tube space; when the flow is warmed, reliability of the wellhead equipment is increased.

1 dwg, 2 cl

 

The invention relates to the oil industry, and in particular to the wellhead equipment for oil and gas. The main purpose of the wellhead equipment is suspension pump pipe, the direction of the production well flow line and the provision of gas from the annulus.

Known wellhead valve, a device for releasing gas from the annulus which is executed in the form of a valve complex structures with moving the sleeves and two locking elements.

The disadvantages of them are work insecurity and frequent freezing in the winter. Closest to the claimed invention is No. 2242583, selected as a prototype, in which the relief device pressure from the annulus is made in the form of a Venturi installed in the exhaust pipe suspension and communicating a zone of low pressure with a column head.

Its disadvantages are achieving only a certain reduction of the pressure in the annulus and inefficiency from freezing in the winter.

The aim of the invention is to increase the reliability of the wellhead equipment of the well, a complete reduction of gas pressure in the annulus, preventing conditions for hydrate formation, the increase of the inflow of oil into the well and preventing measurement of the project equipment in the winter.

In the technical solution is used the effect of the vacuum jet pumps (ejectors) and the effects of heat by throttling fluid through local hydraulic resistance and by throttling gas (throttle Joule-Thomson).

It is known that the jet pump with a free-falling stream of water capable of creating a vacuum of 100 mm Hg So using a jet pump in the design of wellhead equipment eliminates complications in the operation of wells by creating the necessary effects when pumping gas-liquid flow. By throttling fluid creates a thermal effect, which is determined by the formula:

where

the coefficient of restitution;

- Prandtl number;

µ is the dynamic viscosity, PA·s;

ρ,ρ15density, kg/m3;

- Heat oil, j/kg°C;

t is the operating temperature of the oil to the throttling process;

Δ - value drosselweg pressure, PA.

λn=0,14; µ=0,01÷0,07; ρ=1000; ρ15=700; C=2000.

By throttling gas emissions are observed, the Joule-Thomson consisting in changing the temperature of the gases at their extension. Experiments show that at sufficiently high pressures the CE gases give a negative Joule-Thomson i.e. heated. Petroleum gas up to 90% of methane, and under certain conditions it will be a negative effect.

We denote the pressure, volume and potential energy of the gas to equal the P1V1U1after throttling - R2V2U2. "Usually when the throttle real gas P1Vl-P2V2>0 and U2-U2>0, the work push the gas leads to an increase in internal energy. In conditions when the push is greater than the increase in the internal potential energy ΔUnomits abundance is increased and the internal kinetic energy ΔUCINthe temperature of the gas increases (dT>0)"(Heat, Vinluan., Megatron and other Textbook for high schools. M.: Vysshaya SHKOLA, 2005, str).

The invention is illustrated by the drawing, which shows a diagram of the borehole wellhead equipment.

Borehole mouth valves are installed on the production casing and contains a flanged tubular cylinder 1 with the side-wall 2 and the flanged pipe suspension side outlet 4. Pipe pendant 3 rests on the tubular cylinder 1 and is attached to her as a flange connection. In the exhaust pipe 4 of the suspension 3 is the jet pump 5, the reception of which is connected with the pipe 6, which is connected with the cavity of the casing head 1, and hence with Olamim annular space 8, educated the production column 9 and column tubing 10. During well operation oil flows through the tubing pipe 10 and through the outlet 4 is drawn from the well bottom to the surface in the oil collecting reservoir. The jet pump 5 is installed in the exhaust pipe 4 of the suspension 3, provides a selection of gas and the reducing gas pressure in the annular space 8, which reduces the back pressure on the reservoir and increases the flow of oil to the well, increasing its performance.

On the pipe 6 additionally set the node 7, which is the construction of three devices. The first is to twist flow, which under the action of centrifugal forces droplets of moisture collected on the perimeter and through the throttle openings of the second device using a jet pump 5 is discharged through the throttle orifice in the discharge line. Dry gas is pumped through the third device in the center of the node 7. By throttling the liquid and the dry gas is the effect of heat dissipation that contribute to the reliable operation of wellhead equipment in the winter.

When working in the summer or the lack of need for heating up the flow of oil to enhance oil flow mouth valves can be used without node 7, which improves performance is Kvasiny.

1. Borehole mouth armature containing installed on the production casing pipe head with elbows resting on her pipe hanger with branches and device for pressure relief of the annular space, wherein the device for pressure relief of the annulus is made in the form prescribed in the exhaust pipe suspension jet pump, the intake of which is connected with the cavity of the casing suspension.

2. Borehole mouth valve according to claim 1, characterized in that it further provides a device for separate throttling water and gas with the aim of obtaining warmth against the freezing equipment.



 

Same patents:

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to mining industry and can be used for exploiting oil-gas fields through remote, automatic and manual control of well shutting-off devices. According to the method, a well can be controlled through opening and closing of shutting-off devices of an X-mas tree - wing and casing valves and an underground safety valve, as well as through regulation of well flow rate using a throttle valve. The well is connected to a control station connected to a central control unit, which comprises a pump-accumulator unit and a well control unit. The pump-accumulator unit comprises a group of pumps and a power functional hydropneumatic accumulator, linked through an actuating medium, mainly in form of liquid, with a high-pressure line, which connects them to the well control unit. The high-pressure line is connected through reducing pressure regulators to power lines for functional control of shutting-off devices and the throttle valve. The station is equipped with a logical control line, which is connected to actuating mechanisms, providing for automatic command transmission for consecutive closure of the wing valve, casing valve, underground safety valve through delay mechanisms. Each delay mechanism has a control hydropneumatic accumulator and a throttle, adjusted for given delay of flow of actuating medium from the control hydropneumatic accumulator. The shut-off command arrives at the actuating mechanism of the wing valve first, then with given delay, to the actuating mechanism of the casing valve, after which, with given further delay, to the actuating mechanism of the underground safety valve. The logical control line is hydraulically linked to monitoring and control devices - a fuse link and a low- and high-pressure control valve. The monitoring and control devices are connected through the actuating medium, each to its trigger mechanism which controls pressure release in the given logical control line. The logical control line is doubly provided with similar trigger mechanisms for remote and manual triggering successive closure of the said well shutting-off devices in the said order.

EFFECT: more reliable and accident-free operation of an oil-gas field, reduced cost of extracting formation fluid, easier control of processes due to automated control of well shutting-off devices.

24 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to mining industry and can be used for exploiting gas fields through remote, automatic and manual control of well shutting-off devices. According to the method, a well can be controlled through opening and closing of shutting-off devices of an X-mas tree - wing and casing valves and an underground safety valve, as well as through regulation of well flow rate using a throttle valve. The well is connected to a control station, which comprises a pump-accumulator unit and a well control unit. The pump-accumulator unit comprises a group of pumps and a power functional hydropneumatic accumulator, linked through an actuating medium with a high-pressure line, which connects them to the well control unit. The high-pressure line is connected through reducing pressure regulators to power lines for functional control of shutting-off devices and the throttle valve. The station is equipped with a logical control line, which is connected to actuating mechanisms, providing for automatic command transmission for consecutive closure of the wing valve, casing valve, underground safety valve through delay mechanisms. Each delay mechanism has a control hydropneumatic accumulator and a throttle, adjusted for given delay of flow of actuating medium from the control hydropneumatic accumulator. The shut-off command arrives at the actuating mechanism of the wing valve first, then, with given delay, to the actuating mechanism of the casing valve, after which, with given further delay, to the actuating mechanism of the underground safety valve. The logical control line is hydraulically linked to monitoring and control devices - a fuse link and a low- and high-pressure control valve. The monitoring and control devices are connected through the actuating medium, each to its trigger mechanism which controls pressure release in the given logical control line. The logical control line is doubly provided with similar trigger mechanisms for remote and manual triggering successive closure of the said well shutting-off devices in the said order.

EFFECT: more reliable and accident-free operation of a gas field, reduced cost of extracting gas, easier control of processes due to automated control of well shutting-off devices.

25 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of gas-condensate fields and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of wells, which are part of a gas-condensate well pad. The well pad comprises at least two gas-condensate wells, each of which contains a production casing with a flow column with underground production equipment, containing at least a remote controlled safety valve with an actuating mechanism, wellhead with wellhead equipment, with a casing head and a tubing head on which is mounted an X-mas tree with shutting-off devices - casing and wing valves with actuating mechanisms, as well as a throttle valve adjacent to the latter with an actuating mechanism, and monitoring and control devices - a fuse link and a low- and high-pressure control valve. Each well is connected to a control station through its shutting-off devices, throttle valve and safety valve, where the control station comprises a common pump-accumulator unit and at least one control unit for each well. The pump-accumulator unit comprises a group of pumps and a high-pressure power functional hydropneumatic accumulator, connected to it through actuating medium of a high-pressure line. Each control unit comprises power lines for functional control of actuating mechanisms of shutting-off devices, throttle valve, safety valve for each well, supplied by the said high-pressure line, through pressure regulators, and can control their operation through a time-stepped system for delaying command transmission for at least shutting off each well in the logical sequence: "wing valve - casing valve - safety valve" - logical control line, linked to the fuse link and the low- and high-pressure control valve and fitted with hydraulic distribution valves, with possibility of backing up command transmission for shutting off each well. One of these valves can transmit a well shut-off command to the logical control line from the fuse link, the other - from the low- and high-pressure control valve, and at least two others - from remote and manual control respectively. The said delay system comprises delay mechanisms, fitted on sections for interaction of the logical control line with power lines for functional control of actuating mechanisms of the casing valve and safety valve. The delay mechanisms comprise a control hydropneumatic accumulator and a throttle, which provide for shutting off each well at different times. The power line for functional control of the actuating mechanism of the safety valve of each well is provided with at least one pressure booster, which interacts with a reducing pressure regulator, which provides for values which, when multiplied with the transmission ratio of the booster, provide for operating pressure at the output, required for operation of the actuating mechanism of the safety valve.

EFFECT: more reliable and accident-free operation of a well, which is part of a gas-condensate well pad and much easier control of processes.

17 cl, 3 dwg, 1 ex

Gas well pad // 2367787

FIELD: gas-and-oil production.

SUBSTANCE: invention relates to exploitation of gas fields and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of wells, which are part of a gas well pad. The well pad comprises at least two gas wells, each of which contains a production casing with a flow column with underground production equipment, containing at least a remote controlled safety valve, wellhead with wellhead equipment, with a casing head and a tubing head, an X-mas tree with casing and wing valves, as well as a throttle valve adjacent to the latter with an actuating mechanism, and monitoring and control devices - a fuse link and a low- and high-pressure control valve. Each well is connected to a control station through its shutting-off devices, throttle valve and safety valve, where the control station comprises a common pump-accumulator unit and at least one control unit for each well. The pump-accumulator unit comprises a group of pumps and a high-pressure power functional hydropneumatic accumulator, connected to it through actuating medium of a high-pressure line. Each control unit comprises power lines for functional control of actuating mechanisms of shutting-off devices, throttle valve, safety valve for each well, supplied by the said high-pressure line, through pressure regulators, and can control their operation through a time-stepped system for delaying command transmission for at least shutting off each well in the logical sequence: wing valve - casing valve - safety valve - logical control line, linked to the fuse link and the low- and high-pressure control valve and fitted with hydraulic distribution valves, with possibility of backing up command transmission for shutting off each well. One of these valves can transmit a well shut-off command to the logical control line from the fuse link, the other - from the low- and high-pressure control valve, and at least two others - from remote and manual control respectively. The said delay system comprises delay mechanisms, fitted on sections for interaction of the logical control line with power lines for functional control of actuating mechanisms of the casing valve and cut off device. The delay mechanisms comprise a control hydropneumatic accumulator and a throttle, which provide for shutting off each well at different times.

EFFECT: more reliable and accident-free operation of a well, which is part of the gas well pad, reduced cost of extracting gas and much easier control of processes.

17 cl, 3 dwg

Oil well // 2367786

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of oil fields, and can be particularly used for remote, automatic and manual control of actuating mechanisms of well shutting-off devices. The well has a production casing with a flow column with underground production equipment, containing at least a circulating valve, shear valve, non-freezing check valve and, if necessary, a separating device, meant for separating oil and water. There is also a remote controlled device for cutting off flow of oil, which has an actuating mechanism, a wellhead with wellhead equipment, with a casing head, a tubing head, on which an X-mas tree is mounted, which includes shutting-off devices - casing and wing valves with actuating mechanisms, as well as a throttle valve adjacent to the latter, which regulates well flow rate and has an actuating mechanism, and monitoring and control devices - a fuse link and a low- and high-pressure control valve. The well is connected to a station for controlling shutting-off devices, throttle valve and cut off device, which comprises a pump-accumulator unit and at least one control unit per well. The pump-accumulator unit comprises a group of pumps and a high-pressure power functional hydropneumatic accumulator, connected to it through actuating medium of a high-pressure line. The control unit comprises power lines for functional control of actuating mechanisms of shutting-off devices, throttle valve and cut off device, where the said power lines are supplied by the said high-pressure line through pressure regulators, which reduce functional pressure to the required value. There is also a logical control line, which controls operation of actuating mechanisms through a time-stepped system for delaying command transmission for at least shutting-off the well in the logical sequence: wing valve - casing valve - cut off device. This line is connected to the fuse link and low- and high-pressure control valve and is fitted with hydraulic distribution valves with possibility of backing up command transmission for well shutting off. One of these valves can transmit a well shut-off command to the logical control line from the fuse link, the other - from the low- and high-pressure control valve, and at least two others - from remote and manual control respectively. The said delay system comprises delay mechanisms, fitted on sections for interaction of the logical control line with power lines for functional control of actuating mechanisms of the casing valve and cut off device. The delay mechanisms comprise a control hydropneumatic accumulator and a throttle, which provide for well shut-off at different times. The power line for functional control of the actuating mechanism of the throttle valves is provided with a three-position distribution valve, preferably with two electromagnets.

EFFECT: more reliable and accident-free operation of an oil well, reduced cost of oil extraction and much easier control of processes.

16 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to mining industry and can be used for exploiting oil fields through remote, automatic and manual control of well shutting-off devices. According to the method, a well can be controlled through opening and closing of shutting-off devices of an X-mas tree - wing and casing valves and an underground safety valve, as well as through regulation of well flow rate using a throttle valve. The well is connected to a control station, which comprises a pump-accumulator unit and a well control unit. The pump-accumulator unit comprises a group of pumps and a power hydropneumatic accumulator, linked through an actuating medium with a high-pressure line, which connects them to the well control unit. The high-pressure line is connected through reducing pressure regulators to power lines for functional control of shutting-off devices and the throttle valve. The station is equipped with a logical control line, which is connected to actuating mechanisms, providing for automatic command transmission for consecutive closure of the wing valve, casing valve, underground safety valve through delay mechanisms. Each delay mechanism has a control hydropneumatic accumulator and a throttle, adjusted for given delay of flow of actuating medium from the control hydropneumatic accumulator. The shut-off command arrives at the actuating mechanism of the wing valve first, then with given delay, to the actuating mechanism of the casing valve, after which, with given further delay, to the actuating mechanism of the underground safety valve. The logical control line is hydraulically linked to monitoring and control devices - a fuse link and a low- and high-pressure control valve. The monitoring and control devices are connected through the actuating medium, each to its trigger mechanism which controls pressure release in the given logical control line. The logical control line is doubly provided with similar trigger mechanisms for remote and manual triggering successive closure of the said well shutting-off devices in the said order.

EFFECT: more reliable and accident-free operation of an oil field, reduced cost of extracting oil, easier control of processes due to automated control of well shutting-off devices.

25 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to mining industry and can be used for exploiting gas-condensate fields through remote, automatic and manual control of well shutting-off devices. According to the method, a well can be controlled through opening and closing of shutting-off devices of an X-mas tree - wing and casing valves and an underground safety valve, as well as through regulation of well flow rate using a throttle valve. The well is connected to a control station, which comprises a pump-accumulator unit and a well control unit. The pump-accumulator unit comprises a group of pumps and a modular-sectional power functional hydropneumatic accumulator, linked through an actuating medium with a high-pressure line, which connects them to the well control unit. The high-pressure line is connected through reducing pressure regulators to power lines for functional control of shutting-off devices and the throttle valve. The station is equipped with a logical control line, which is connected to actuating mechanisms, providing for automatic command transmission for consecutive closure of the wing valve, casing valve, underground safety valve through delay mechanisms. Each delay mechanism has a control hydropneumatic accumulator and a throttle, adjusted for given delay of flow of actuating medium from the control hydropneumatic accumulator. The shut-off command arrives at the actuating mechanism of the wing valve first, then with given delay, to the actuating mechanism of the casing valve, after which, with given further delay, to the actuating mechanism of the underground safety valve. The logical control line is hydraulically linked to monitoring and control devices - a fuse link and a low- and high-pressure control valve. The monitoring and control devices are connected through the actuating medium, each to its trigger mechanism which controls pressure release in the given logical control line. The logical control line is doubly provided with similar trigger mechanisms for remote and manual triggering successive closure of the said well shutting-off devices in the said order.

EFFECT: more reliable and accident-free operation of a gas-condensate field, reduced cost and easier control of gas-condensate extraction processes.

25 cl, 3 dwg

Oil well pad // 2367772

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of oil fields and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of wells, which are part of an oil well pad. The oil well pad comprises at least two oil wells, each of which contains an extracting column with a flow column with underground production equipment, containing at least circulating and shear valves, non-freezing return valve and, if necessary, a separation column, meant for separating oil and water, as well as a remote controlled device for cutting off flow of oil, made with an actuating mechanism, wellhead with wellhead equipment, with a column head, tubing head, on which an X-mas tree is mounted, which comprises shutting-off devices - casing and wing valves with actuating mechanisms, as well as a throttle valve adjacent to the latter for controlling flow, made with an actuating mechanism, and monitoring and control elements - fuse link and a low- and high-pressure valve. Each well is linked through its shutting-off devices to a control station, which comprises a common pump-accumulator unit and at least one control unit for each well. The pump-accumulator unit comprises a group of pumps and a high-pressure power functional hydropneumatic accumulator linked through the actuating medium of the high-pressure line. Each control unit comprises power lines for functional control of actuating mechanisms of shutting-off devices, throttle valve and the cut off device, supplied by the said high-pressure line through pressure regulators, and controls their operation through a time-stepped system for command transmission for at least closure of a well in the logical sequence: "wing valve - casing valve - cut off device" - logical control line, linked to the fuse link and low- and high-pressure control valve and fitted with hydraulic control valves which can back up command transmission for closure of each well. One of the hydraulic control valves transmits a command for closing each well to the logical control line from the fuse link, the other - from the low- and high-pressure control valve, and at least two others - from remote and manual control, respectively. The said delay system comprises delay mechanisms, fitted on sections for interaction of the logical control line with power lines for functional control of actuating mechanisms of the casing valve and the cut off device, where the delay mechanisms comprise a hydropneumatic accumulator and a throttle, which provide for closure of each well at different times. The power line for functional control of the actuating mechanism of the throttle valve is provided with a three-position distribution valve, preferably with two electromagnets.

EFFECT: more reliable and accident-free operation of oil wells, which are part of an oil well pad, reduced cost of extracting oil and much easier control of processes.

16 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to reservoir engineering and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of gas field wells. The equipment contains a control station for shutting-off devices of the well, more specifically wing and casing valves, fitted on wellhead equipment, choke valve, underground safety valve, with actuating mechanisms, as well as a valve for controlling low and high pressure and a fuse link. The control station includes at least one control unit for actuating mechanisms for shutting off devices, a pump-accumulator unit with and actuating medium, mainly in form of liquid, power lines for functional control of the said actuating mechanisms and a logical control line, which can provide for command transmission for at least shutting off the well in a logical sequence: wing valve - casing valve - underground safety valve, fitted for this system for double selective actuation, respectively, of the low pressure and high pressure control valves, fuse link, either remote or manual command for closing shutting off devices of the well. For this purpose the said line is also provided with a timed three-step actuating system with slow transmission of actuation command for at least closure of casing valve and underground safety valve, including logical control lines in at least sections for controlling the casing valve and the underground safety valve, different time-tuned command transmission delay mechanisms, consisting of a combination a hydropneumatic accumulator and a choke, fitted in series in the said sections. The pump-accumulator unit has a tank with actuating medium and a group of pumps.

EFFECT: more reliable and accident-free operation of the well, reduced cost of extracting oil and gas and much easier control of processes.

15 cl, 3 dwg, 1 ex

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of gas fields and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of gas field wells. The equipment contains a control station for shutting-off devices of the well, more specifically wing and casing valves, fitted on wellhead equipment, throttle valve, underground safety valve, with actuating mechanisms, as well as a low- and high-pressure control valve and a fuse link. The control station includes at least one control unit for actuating mechanisms for shutting-off devices, a pump-accumulator unit with and actuating medium, power lines for functional control of the said actuating mechanisms and a logical control line, which can provide for command transmission for at least shutting off the well in the logical sequence: wing valve - casing valve - underground safety valve, fitted for this system for double selective actuation of, respectively, low- and high-pressure control valve, fuse link, either remote or manual command for closure of shutting-off devices of the well. For this purpose the said line is also provided with a timed three-step actuating system with delayed transmission of actuating command for at least closure of the casing valve and underground safety valve, including logical control lines and different time-tuned command transmission delay mechanisms, on at least sections for controlling the casing valve and safety valve. These lines consist of a combination of a hydropneumatic accumulator and a throttle fitted in series in the said sections. The power line for functional control of the actuating mechanism of the safety valve has at least one pressure booster.

EFFECT: more reliable and no-failure operation of the well, reduced cost of extracting gas, much easier control of processes.

15 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to oil and gas industry, particularly to devices which provide for uninterrupted operation of oil or oil-and-gas wells, characterised by annular gas show. The wellhead check valve comprises a hollow body, fitted with a supply pipe for the main component - formation fluid, mainly oil, and a supply pipe for the released component, mainly annular gas, as well as a supply pipe for the mixture of the main and released components. An internal unit is mounted inside the housing of the check valve, with a cup-shaped body, which has one channel in its side wall for releasing annular gas. The check valve also includes a shutting-off device inside the cup, with movable and immovable parts and dividing its cavity into an inlet part in front of the shutting-off device and a working part behind the shutting-off device in the direction of flow of the annular gas, linked to the stream of formation fluid through a channel in the side wall of the cup. The shutting-off device is mounted in the cup and its immovable part rests on the side wall of the cup of the internal unit of the check valve.

EFFECT: provision for uninterrupted operation of the well due to the check valve, which can wash the cup of the internal unit of the check valve with warm formation fluid, virtually on the entire perimeter during the entire operation period, as well as provision for an optimum thermal mode for any unfavourable external conditions.

20 cl, 11 dwg

Shutoff valve // 2315173

FIELD: oil and gas production, particularly safety oil-field valves, valves for gas-distribution stations and underground gas storage facilities.

SUBSTANCE: shutoff valve comprises body with inlet and outlet nipples, seat with gate, pilot mechanism and input mechanism. Pilot mechanism is made as vertical rod and horizontal piston cooperating one with another in central part thereof. Lower end of vertical spring-loaded rod is connected to gate through clip. Pilot mechanism is made as control mechanism with horizontal piston made as spring-loaded horizontal rod. Central part of spring-loaded vertical rod is provided with annular groove having bead. Device has packless electromagnetic drive including body with inductance coil, stop and fixed non-magnetic bush separating inductance coil and spring-loaded horizontal rod cavities in fluid-tight manner. One end of spring-loaded horizontal rod is made as coil core and is arranged inside fixed non-magnetic bush so that is may be communicated with stop. Another end thereof cooperates with annular groove bead.

EFFECT: extended range of valve application due to possibility of remote control.

1 dwg

FIELD: oil production equipment for reservoir pressure keeping systems and to be included in injection well wellhead fittings.

SUBSTANCE: check valve comprises reel-like body with central orifice for check valve receiving. The orifice has end annular sealing extensions to be inserted in corresponding grooves. The grooves are made in front and rear connection flanges of wellhead injection fitting pipeline. The check valve is valve pair of downhole sucker-rod pump. Valve pair position is within positive magnitude of angle of valve pair inclination with respect to horizontal line. Valve pair includes seat and ball arranged in valve cage with central and peripheral through channels so that the ball may move in longitudinal direction for distance equal to valve stroke. Seat is retained by seat holder from the side of front connection flange included in injection wellhead fittings pipeline provided with groove for disc filter receiving. The disc filter has inner annular bead formed from the side of wellhead fitting pipeline flange connection.

EFFECT: increased operational reliability of check valve.

2 dwg

FIELD: technology for forcing substance and/or extracting fluid from well formations.

SUBSTANCE: valve includes shaft, which has one or more radial hydraulic channels, upper thimble or lower sub, upper and lower tubular threads with similar or different diameters. Shaft is made on one end with external threaded recess for spiral spring and adjusting nut, also with two external mounting surfaces with different diameters and grooves for packing elements, and differential piston mounted on two external mounting surfaces with or without an external support nut. Piston forms a hydraulic chamber together with shaft, connected to shaft hollow through one or several radial hydraulic channels. In accordance to invention in shaft, on another end, made additionally are external threaded recess for spiral spring and adjusting nut and a mounting surface. On external mounting surface, additional differential piston is mounted with or without threaded radial apertures, drive limiter, clamp, and internal packing, or a protective bushing is positioned for overlapping packing elements in grooves on middle external mounting surface of shaft during circulation of flow of substance through one or more radial hydraulic channels. Additional differential piston forms an additional hydraulic chamber with shaft, connected to shaft hollow through one or more additionally made radial hydraulic channels. Either both differential pistons or differential piston and protective bushing interact with each other under force from one or both spiral springs. In staring closed position of valve, packing elements in grooves hermetically isolate upper and/or lower hydraulic chambers from external space, and in working open position of valve, with upward or downward movement of differential piston, either another differential piston or protective bushing may overlap packing elements, thus preventing movement of a flow of substance through them.

EFFECT: increased reliability, efficiency and functionality of operation of diverter valve.

14 cl, 17 dwg

Shutoff valve // 2271438

FIELD: gas industry, particularly gas and oil flowing well protection during critical pressure decrease (increase) in well line.

SUBSTANCE: shutoff valve comprises body with inlet and outlet nipples, seat with gate, pilot mechanism, as well as adjusting and cocking devices. The pilot mechanism is made as vertical spring-loaded rod and horizontal piston with sealing means. Lower rod end is connected with the gate by link. Flat longitudinal surfaces with single transversal rests are formed in central parts of the rod and the piston. The rod and the piston may cooperate one with another so that rod rest is arranged over the piston rest. Shutoff valve adjusting device includes adjusting nut and spring brought into cooperation with the piston. The cocking device is made as outer cocking bush threadedly engaging the body and cocking bush, which may freely slide along upper rod end. The cocking bush is connected with outer cocking bush.

EFFECT: simplified structure, improved responsiveness, reliability and accuracy of valve operation.

2 dwg

FIELD: equipment for sealing or packing boreholes or wells.

SUBSTANCE: valve has metal body with inlet and outlet ends in which ceramic members are inserted. Valve also comprises replaceable reducer preferably formed ceramics. Flange unions connected to reducing valve provide transition from reducer orifice having small diameter to pipe having larger diameter. The pipe is communicated with oil refining equipment. Flange union has metal body with through channel in which ceramic member is arranged. Through channels of the ceramic members are preferably conical and have diameters gradually increasing from outlet orifice of reducing valve to inner orifice of the pipe.

EFFECT: increased service life.

41 cl, 15 dwg

Spool faucet // 2186952
The invention relates to the equipment infrastructure of oil and gas wells and can be used during the drilling and operation of oil and gas wells

The valve-choke // 2150568
The invention relates to the equipment infrastructure of oil and gas wells and can be used during the drilling and operation of oil and gas wells

FIELD: equipment for sealing or packing boreholes or wells.

SUBSTANCE: valve has metal body with inlet and outlet ends in which ceramic members are inserted. Valve also comprises replaceable reducer preferably formed ceramics. Flange unions connected to reducing valve provide transition from reducer orifice having small diameter to pipe having larger diameter. The pipe is communicated with oil refining equipment. Flange union has metal body with through channel in which ceramic member is arranged. Through channels of the ceramic members are preferably conical and have diameters gradually increasing from outlet orifice of reducing valve to inner orifice of the pipe.

EFFECT: increased service life.

41 cl, 15 dwg

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