Procedure for pumping lift gas into production flow string of oil well and device applied thereon for control of lift gas yield

FIELD: oil and gas production.

SUBSTANCE: group of inventions refers to procedure of pumping lift gas into production flow string of oil well via one or several devices for control of yield of lift gas and to facility applied thereon for control of lift gas yield. The essence of the invention is as follows: the facility consists of a tubular case of a valve with a flow passage connected with one end to pressure pipeline of lift gas, while with another end to internal space of production string; further the facility consists of a rotation body of a flap valve connected to the body of the valve and installed in the flow passage so that when the body of the valve turns into an open position it is essentially oriented parallel to the flow passage. When the body of the valve rotates into a closed position it orients perpendicularly to the flow passage and is pressed to a circular saddle of the valve thus shutting off lift gas pass via the flow passage. Also there is a protective bushing designed to slide in the flow passage between the first position, wherein the bushing passes through the circular saddle of the valve during rotation of the valve body in the open position protecting the valve saddle and valve body from wear under flow of lift gas or other fluid, and the second position wherein the bushing passes through a part of the flow passage before the valve body during rotation of the valve body in the closed position. There is a flow limiter forming a part of the protective bushing of the valve; dimension of the limiter produces different pressure with lift gas flowing through it; difference in pressure actuates the bushing to move into the first position. Also the bushing is characterised with a tapered narrowing part. External diametre of the bushing gradually diminishes in a successive direction of the bushing; the first flexible sealing ring is installed in the case before the saddle of the valve, therefore external surface of the narrowing part of the saddle is pressed to internal surface of the first sealing ring when the bushing is in its first position and in such way there is ensured an impenetrable for fluid sealing in circular space between the narrowing part of the bushing and the tubular body of the valve; as a result, in the second position of the bushing, the first sealing ring just not tightly contacts the narrowing part of the bushing.

EFFECT: facilitating efficiency of procedure and reliability of device operation.

10 cl, 2 dwg

 

Prior art

The present invention relates to a method of injection carrier gas into the production casing of the oil well through one or more devices for regulating the flow rate of carrier gas and used in the way that the device for controlling the flow rate of carrier gas.

Usually transporting gas is injected into the annular space between the production column and the surrounding casing and then pumped to transport the gas in the production casing from the annular space through one or more devices for regulating the flow rate of carrier gas in the lateral deposits distributed along the length of the production string. Transporting gas, which is pumped through the device for controlling the flow rate in the flow of crude oil (or other fluid medium) in the production string, reduces the density of the column of fluid in it and increases the speed of production of crude oil in the well.

Commercially available devices for regulating the flow rate of carrier gas typically use one-way check valves with ball, hemisphere or cone, which is pressed by a spring to the valve seat insert. If the pressure of the carrier gas above the pressure of the flow of crude oil in exploitatio the Noah column, this pressure difference exceeds the force of the spring acting on the ball, causing the spring is compressed and the ball rises or moves to or from the valve seat, and transporting the gas can pass from the gas-filled uploaders pipes in the production casing. But if the pressure of the flow of crude oil will be higher than the pressure of carrier gas in uploaders pipe, the total force of the spring and the pressure difference in the device for controlling the flow rate of the transport gas is being pushed ball or hemisphere to the annular seat, thereby closing the valve and preventing the leakage of crude oil or other fluid from the production string in uploaders pipe.

The difficulty known non-return valves is that the ball or hemisphere and the annular valve seat exposed to the influence of the flow of carrier gas, which may be liquid or sand, or other abrasive particles and/or aggressive chemicals like hydrogen sulfide and carbon dioxide. In this regard, a sphere or a hemisphere and the valve seat is exposed to mechanical or chemical destruction, which may leak from the valve, and crude oil or other fluid medium can flow into the uploaders pipe from the casing and vposledstvii and will be able to block the injection of carrier gas, when the level of crude oil or other fluid medium in uploaders pipe will reach the location of the device for controlling the transporting gas or devices for regulating the flow.

U.S. patent No. 5535828 reveals controlled from the surface of the valve carrier gas, which is injected, with the possibility of its withdrawal, side seam in the flow pipe of an oil well and which has the shape of a truncated cone, the valve body is mounted on a hydraulic piston, which is driven from the surface and presses the valve body to have a shape of a truncated cone with the valve seat to the valve body was raised from the valve seat. The valve body and the valve seat is opened for exposure to a stream of carrier gas, and they are exposed to mechanical and chemical destruction.

According to U.S. patent No. 5004007 provide controlled from the surface of the valve for the injection of chemical reagents, in which the valve body of the folding type and the corresponding annular valve seat is protected from exposure to the flow of the injected chemical protective sleeve, which hydraulic pressure pushes through the annular valve seat and which is pushed back by the spring when the reduction of hydraulic pressure below a threshold level, causing the body of the folding CL the pan can sit on the annular valve seat. Known valve for injection of chemical reagents has a flow limiter connected to the valve body and the piston, acting on the differential pressure in the flow limiter. The piston is installed in the cylindrical cavity in the valve body near the sleeve and connected with it. The piston serves to overcome the frictional forces between the sleeve and seals between the sleeve and the valve body, and the location of the piston sleeve near complicates the valve, thereby increasing its cost, and he may refuse if the pollutants, sand or abrasive particles Scopata in the cylindrical cavity above the piston and/or if you break the seal.

Complex design-driven surface of the valve for the injection of chemicals makes it impractical to replace the known wear of ball valves spring action.

The purpose of the present invention is to provide an improved method for injection carrier gas, according to which use one or more devices for regulating the flow rate of carrier gas having a minimum number of moving wear parts and which is cost effective and durable, and the creation of durable device for controlling the flow rate of carrier gas, easy to manufacture and convenient ekspluatacii.

The invention

According to the invention a device for regulating the flow rate of carrier gas for injection carrier gas or other fluid into the production casing of an oil well containing a tubular valve body having a flow channel connected at one end with a pressure pipeline transporting gas and the other end with the inner space of the casing, the body of the flapper valve, connected to rotate with the valve body and installed in the flow channel so that during rotation of the valve body in the open position it is oriented essentially parallel to the flow channel, and rotating the body of the valve body in the closed position it is oriented essentially perpendicular to the flow channel and pressed against the circular valve seat, thereby blocking the passage of carrier gas flow channel, a protective sleeve valve mounted slidable in the flow channel between a first position in which the sleeve passes through the annular valve seat while rotating the valve body in its open position, thereby protecting the valve seat and the valve body from wear by the flow of carrier gas or other fluid medium, and a second position in which the sleeve passes che the ez part of the flow channel before the valve seat while rotating the valve body in its closed position, and the flow limiter, which forms part of the protective sleeve valve and having a size for creating the differential pressure passing through it a stream of carrier gas, under the action of which the sleeve is able to move in the first position, the sleeve has a conical tapering portion, the outer diameter of the sleeve is gradually reduced in subsequent direction of the sleeve, the first flexible sealing ring mounted in the casing in front of the valve seat, resulting in the outer surface of the tapering part of the seat is pressed against the inner surface of the first sealing ring when the sleeve is in its first position, thereby providing impervious to the fluid seal in the annular space between the tapering part sleeve and a tubular valve body when the sleeve is in its first position, as a result, the first sealing ring only loosely in contact with the tapering part of the sleeve when the sleeve is in its second position.

The device may include a second flexible sealing ring mounted in the tubular body after the first sealing ring and is able to act as a stop for the sleeve when it is moved to its first position.

The first and second sealing rings can be made of the elastomeric material and form a reinforced annular chamber, in case flapper valve and seat when moving the sleeve in its first position.

The body of the flapper valve may have a spring disposed between the tubular valve body and a protective sleeve valve and capable of displacing the valve body in the closed position and a protective sleeve valve in the second position.

The device can be configured with removable installation is essentially in a vertical position in a side pocket in the production string of an oil well, and the spring is able to be compressed when the excess weight protective sleeve valve and effort impacts from transporting gas on the sleeve a predetermined threshold value.

The spring can be made with the possibility of compression at a pressure of injection carrier gas is less than the pressure of the injection carrier gas that is generated during normal oil production.

The body of the flapper valve may have an inclined surface with such dimensions, at which point the initial contact with the sleeve when it is moved from the second position to the first position is a point most remote from the hinge pin body flapper valve.

The angle of the tapering portion of the sleeve is selected so that the hub is centered in the body when the moving body flapper valve in the open on egenie.

According to the invention also created a method of injection carrier gas in the operating pipe oil well through at least the above-described device and method of production of crude oil, according to which crude oil production increase due to the injection of carrier gas in the production casing, using the specified method.

These and other features, advantages and the method of injection carrier gas and device for controlling the flow rate according to the invention in more detail is set out in the attached claims, the abstract and the description with reference to the accompanying drawings.

Brief description of drawings

Hereinafter the invention is described in more detail with reference to the accompanying drawings, which depict the following:

figure 1 depicts a longitudinal section of a device for controlling the flow rate according to the invention in the open position of the housing flapper valve and the second position, the protective sleeve valve, and

figure 2 is a longitudinal section of a device for controlling the flow rate shown in figure 1 in the closed position of the hinged flap and the first position of the protective sleeve valve.

Detailed description of the preferred embodiment of the

As shown in figure 1, the device for controlling the flow containing the tubular body clapano, having a longitudinal flow passage 2, in which the body 3 flapper valve installed with the possibility of rotation in such a way that the valve body 3 can be rotated between a closed position in which the body 3 is pressed against the circular valve seat 4, according to figure 1, and an open position in which the valve body 3 is oriented parallel to the flow channel 2, as shown in figure 2.

Protective sleeve 5 valve installed in the valve body, with the possibility of sliding between the first position according to figure 2, and a second position, according to Fig 1.

In the first position according to figure 2 the valve is open, and the pressure difference in the limiter 8, set in sleeve 5, pushes the sleeve 5 upwards, causing the sleeve is pressed against the first and second sealing rings 6 and 7. A pressure difference is created by the flow of carrier gas or other fluid within the valve body through multiple inlet ports 9 and passing through the flow channel 2 to the outlet 10 of the valve above the valve, causing the sleeve 5 rises, overcoming the action of the spring 11.

In the second position according to figure 1 in the flow channel 2, the transporting gas is not injected, and therefore, no pressure difference in the limiter 8 stream, and the spring 11 pushes the sleeve down, resulting in the top of the sleeve 5 is under the number of the zinc saddle 4 flapper valve. The downward movement of the sleeve 5 in the second position enables the body 3 flapper valve to turn down to the ring to the valve seat 4.

In addition to the spring 11, which moves the sleeve 5 in the second position, any reverse flow of fluid through the sleeve 5 creates a pressure difference, which also creates a force in the direction of movement of the sleeve 11 in the second (closed) position. Protective sleeve 5 valve has a tapering upper portion, the angle of narrowing which is selected in such a way that the sleeve 5 is centered during its movement to the first position. Thus, if the sleeve is in the first position according to figure 2, the conical outer surface of the sleeve 5 is tightly in contact with the first elastomeric sealing ring 6. The first and second sealing rings 6 and 7 thus form an annular recess 12, in which the body 3 and the annular valve seat 4 is protected from mechanical and/or chemical destruction caused by the flow of carrier gas through the flow channel 2. When the interrupt injection carrier gas spring 11 pushes the sleeve 5 down, and the first sealing ring only loosely in contact with the tapering outer surface of the protective sleeve 5 of the valve, and therefore the sleeve smoothly slide in its second position under the action of tension springs and under its own weight,and it requires no additional hydraulic force an additional piston - in accordance with U.S. patent No. 5004007.

Instead of providing the sleeve with a tapering top and install the second o-ring 6 in the recess in the inner wall of the housing 1 of the second valve sealing ring 6 can be installed in a recess in the outer wall of the cylindrical sleeve 5, which is surrounded by a tapering body portion 1 of the valve.

The housing 1 of the valve has a conical nose portion 14 and a few o-rings 15, which provide the opportunity for removable installation of the valve in a side pocket in the production string according to the technical solution of U.S. patent No. 5535828, and the inlet 9 is communicated through the fluid medium with the annular space between the production column and the surrounding casing, and in this space to transport the gas is pumped from the surface, and the exhaust port 10 of the valve produces transporting gas in the crude oil stream in the production string.

The outlet valve 10 can have many small holes for pump gas or porous membrane according to the published international patent application WO 0183944 through which the transporting gas is pumped into a stream melkodispersionnyh bubbles in the flow of crude oil, resulting in a foam or foamy mixture of carrier gas and si is th oil.

The plane of the inclined surface 3A of the body 3 of the valve is not parallel to the plane of the sealing surfaces of the valve. The sealing surface of the valve fully and simultaneously in contact with the entire surface of the seal or valve seat 4 in the device for regulating the flow rate. The sealing surface of the flapper valve and the sealing surface in the housing of the device for controlling the flow perpendicular to the geometric axis of the sleeve 5 and parallel to the surface of the sleeve. Because the plane of the inclined surface 3A of the body 3 of the hinged valve is not parallel to the surface 5A of the sleeve 5 when the sleeve 5 is moved from the second position to the first position, the sleeve 5 is in contact with one part of the surface 3A of the body 3 of the hinged valve prior to its engagement with the other part. The inclined surface 3A of the hinged valve shall be of such dimensions, at which point 3C of the initial contact with the sleeve while moving it from the second position to the first position will be a point 3C, the farthest from the hinge pin 3B of the body flapper valve. Due to this, the voltage acting on the hinge pin 3B, will decrease, so will last the lifetime of the hinge pin and reducing the number of failures caused by voltage hinge pin.

The angles of the inlet holes 9 have a RA the measures that the incoming fluid is introduced into the flow channel 2 device for controlling the flow rate with a minimum of sharp changes of direction. This is to minimize changes direction provides the possibility of increasing the amount of carrier gas or other fluid through the device to regulate the flow at the same flow condition, and other devices to regulate the flow rate, which is not envisaged minimum number of changes of direction of flow. In addition, reducing the number of changes the flowing direction of the fluid reduces erosion surfaces of the device for controlling the flow rate due to reduced turbulence.

1. A device for controlling the flow rate of carrier gas for injection carrier gas or other fluid into the production casing of an oil well containing a tubular valve body having a flow channel connected at one end with a pressure pipeline transporting gas and the other end with the inner space of the casing, the body of the flapper valve, connected to rotate with the valve body and installed in the flow channel so that during rotation of the valve body in the open position it is oriented essentially parallel to the flow channel, and when the chief is the valve body in the closed position it is guided, essentially perpendicular to the flow channel and pressed against the circular valve seat, thereby blocking the passage of carrier gas flow channel, a protective sleeve valve mounted slidable in the flow channel between a first position in which the sleeve passes through the annular valve seat while rotating the valve body in its open position, thereby protecting the valve seat and the valve body from wear by the flow of carrier gas or other fluid medium, and a second position in which the sleeve passes through a portion of the flow channel before the valve seat while rotating the valve body in its closed position, and stopper flow forming part of the protective sleeve valve and having a size for creating the differential pressure passing through it a stream of carrier gas, under the action of which the sleeve is able to move in the first position, the sleeve has a conical tapering portion, the outer diameter of the sleeve is gradually reduced in subsequent direction of the sleeve, the first flexible sealing ring mounted in the casing in front of the valve seat, resulting in the outer surface of the tapering part of the seat is pressed against the inner surface of the first sealing ring when the sleeve is in its first position, the sa is output providing not permeable to the fluid seal in the annular space between the tapering part of a sleeve and a tubular valve body when the sleeve is in its first position, in the result, the first sealing ring only loosely in contact with the tapering part of the sleeve when the sleeve is in its second position.

2. The device according to claim 1, which includes a second flexible sealing ring mounted in the tubular body after the first sealing ring and is able to act as a stop for the sleeve when it is moved to its first position.

3. The device according to claim 2, in which the first and second sealing rings made of elastomeric material and form a reinforced annular chamber in which is located the housing flapper valve and seat when moving the sleeve in its first position.

4. The device according to any one of claims 1 to 3, in which the body of the flapper valve has a spring disposed between the tubular valve body and a protective sleeve valve and capable of displacing the valve body in the closed position and a protective sleeve valve in the second position.

5. The device according to claim 4, which is made with removable installation is essentially in a vertical position in a side pocket in the production string of an oil well, and the spring is able to be compressed when the excess weight protective sleeve valve and effort impacts from transporting gas on the sleeve a predetermined threshold value.

6. Device is about according to claim 5, in which the spring is configured to compress when pressure injection carrier gas is less than the pressure of the injection carrier gas that is created when normal oil production.

7. Device according to any one of claims 1 to 3, 5 and 6, in which the body of the flapper valve has an angled surface such size, at which point the initial contact with the sleeve when it is moved from the second position to the first position is a point most remote from the hinge pin body flapper valve.

8. The device according to claim 1, in which the angle of the tapering portion of the sleeve is selected so that the hub is centered in the body when the moving body flapper valve in the open position.

9. The method of injection carrier gas in the operating pipe oil well through the at least one device made according to one of claims 1 to 8.

10. Method of production of crude oil, according to which crude oil production increase due to the injection of carrier gas in the production casing, using the method according to claim 9.



 

Same patents:

Wellhead equipment // 2368759

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

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: mining industry.

SUBSTANCE: invention can be used in case of gas-lift operation of wells equipped by free piston-type installations. Invention envisages stopping well, connecting tube space and annular space in wellhead, recording bottom zone and wellhead pressures in tube and annular spaces, and computing well operation parameters using inflow curve plotted according to differences of bottom zone and wellhead pressures. Volume of produced fluid is found from potential output of formation and from condition of output of free piston. When comparing these volumes, parameters of well are computed in the base of minimum volume value.

EFFECT: optimized well operation.

2 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: foam-forming compound for shutting wells contains hydrocarbon liquid, mixture of surfactants, one of components thereof is water solution of lignosulphonate reagent of 25% concentration, herbal filling agent and 20% water solution of calcium chloride, as lignosulphonate agent reagent it contains powder-like technical lignosulphonate, and as other component of surfactant mixture - hexamethylentetramine, and as herbal filling agent - peat or grass flour with following ratio of components in percents of mass: hydrocarbon liquid 12-14, said water solution of technical powder-like lignosulphonate 17-21, hexamethylentetramine 0.17-0.63, peat or grass flour 3-6, said calcium chloride solution - the rest, while relation of mass portions between said water solution of technical powder-like lignosulphonate and hexamethylentetramine is 1: 0.01-0.03 respectively, as grass flour it contains pulverized herbal waste of grain bread production or similar substance.

EFFECT: higher efficiency.

2 cl, 18 ex, 1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: compound includes water and inhibiting salt, as inhibiting salt contains processed electrolyte - side product during production of magnesium via electrolysis from carnallite, and additionally as reducer of filtering and thickener - carbooximethylcellulose polymer, and as colmatation agent - magnesium oxide with following relation of components in percents of mass: processed electrolyte - side product of magnesium production via electrolysis from carnallite 10.0-15.0, carbooximethylcellulose 2.5-3.0; magnesium oxide 1.0-2.0, water 80.0-86.5.

EFFECT: higher efficiency.

3 tbl

FIELD: oil and gas producing industry, in particular composition for killing of well.

SUBSTANCE: claimed polysaccharide gel contains sweet or mineralized water, polysaccharide gelling agent, boron cross-linking agent, diethanolamine, quaternary ammonium compounds, and mixture of non-ionic and anionic surfactant (complex surfactant). Mixture of water soluble oxyethilated alkylphenols and their sulphoethoxylates in form of sodium salts or salts with triethanolamine is used as complex surfactant in amount of 0.1-0.5 kg on 1000 l of water being the gel base. Polysaccharide gel is obtained by dissolution and hydration of polysaccharide gelling agent in sweet or mineralized water (preferably monovalent ion solution) followed by treatment of obtained polysaccharide solution with aqueous solution including boron cross-linking agent, diethanolamine, quaternary ammonium compounds, and complex surfactant.

EFFECT: well killing composition of improved quality.

2 cl, 6 ex, 1 tbl

FIELD: oil extractive industry.

SUBSTANCE: method includes mounting compressor pump in such a way, that input aperture of tail piece was positioned below bed sole. Prior to that water cone in face-adjacent zone is destroyed by draining water through tail piece, connected to lower suck-in valve of compressor pump cylinder, and along behind-pipe space through side suck-in valve of compressor pump cylinder. In case of increase of hydrocarbon contained in drained liquid beginning of water cone destruction is assumed. Draining is continued until destruction of emulsion in water cone, formed in non-homogenous porous environment of bed at limits of hydrocarbon-water and water-hydrocarbon, separation of water and hydrocarbon streams and bringing current water-hydrocarbon contact to initial position. Then during extraction water is drained through tail piece, and hydrocarbon - along behind-pipe space.

EFFECT: higher yield.

3 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes preparation of technological liquid - water solution of sylvinite ore mixture with chlorine calcium by solving a mixture of components in hot fresh technical water, drained from oil and water preparation plants or bed water. During solution of sylvinite ore mixture with chlorine calcium in bed water the latter is drained from the well at temperature 60-90°C. Technological liquid is produced with solution density 1.23-1.37 t/m3. Then prepared technological liquid is fed into well shaft a bit lower, oppositely to zone and above ceiling of productive bed with forming of hydraulic column above the latter. Then well shaft to the mouth is filled with water. Value of technological liquid hydraulic column of high density on basis of said mixture, fed into well shaft above ceiling of productive column of technological liquid is taken in amount, necessary and enough from well stopping conditions.

EFFECT: higher efficiency.

6 cl, 1 ex

FIELD: oil and gas production.

SUBSTANCE: water-based composition that can be used for killing of well during pullout of hole and well remedial work as well as for temporary abandonment of well contains, wt %: carboxymethylcellulose3.5-4.5, sodium hydroxide1.5-2.0, copper sulfate 0.3-0.4, and methanol 4.0-16.0.

EFFECT: improved rheological properties of composition and increased lifetime of formed gels.

1 tbl

FIELD: oil and gas industry.

SUBSTANCE: method includes serial pumping into well of buffer, blocking and pressing liquid, blocking liquid contains hydrocarbon base, acyclic acid, caustic soda and mineral filler with following relation of components in percents of mass: hydrocarbon base 41-72, acyclic acid 6.1-14.4, caustic soda 4.9-13.0, mineral filler the rest. Hydrocarbon base of blocking liquid is oil or oil processing products. As mineral filler blocking liquid has calcium carbonate with diameter of particles no less than 2 micrometers.

EFFECT: higher efficiency, simplified maintenance, simplified construction.

3 cl, 1 ex

FIELD: oil industry.

SUBSTANCE: at least one acoustic dynamic is mounted immediately on product pipe in oil well and acoustic characteristic of flowing environment flow is determined in product pipe. It is sent into surface controller, using product pipe. Using surface controller flowing substance flowing mode is determined, on basis of which working parameters of oil well are adjusted. Working parameters of oil well can be adjusted to detect Taylor mode of flow. For adjustment of working parameters throttle is used and/or controlled valve of oil well, controlling amount of gas, forces into product pipe. For determining mode of flow of flowing environment artificial neuron net can be used. It is possible is provide energy for acoustic sensor through product pipe. It is possible to determine additional physical characteristics of flowing substance, for example pressure and temperature.

EFFECT: higher efficiency.

3 cl, 22 dwg

FIELD: mining industry.

SUBSTANCE: system has first induction throttle, second induction throttle and controlled switch. Second induction throttle is positioned near second branch of pipeline structure. Controlled switch has two outputs. First switch output is electrically connected to pipeline structure on the side of induction throttles connection, where first and second branches of pipeline structure intersect. Second output of switch is electrically connected to pipeline structure on other side of at least one induction throttle. Pipeline structure can be positioned inside oil well, and can have casing string and operation tubing column. Also described is method for extracting oil products from oil well using said system.

EFFECT: higher efficiency.

4 cl, 10 dwg

Up!