Hydraulic pump smart device for oil production and data acquisition from well bottom

FIELD: oil and gas industry.

SUBSTANCE: invention suggests hydraulic pump smart device for oil production and acquisition and storage of data from the well bottom that comprises jet pump unit, the lower isolation valve and unit with electronic instruments, which form a united and integrated unit actuated by operating fluid injected to the well from the ground oil lifting, closure of the well bottom, recovery of pressure in the formation and lifting of the device to the surface. The invention also discloses the method for oil production, receipt and recording of data from the well bottom using the above device.

EFFECT: performance of one complex function consisting in lifting of fluid and recording of data from the well bottom by means of temporary closure of the well.

17 cl, 11 dwg

 

The technical field to which the invention relates.

This invention relates mainly to the study of oil and gas wells. In particular, the invention relates to a device and method of artificial lift oil from the reservoir through a system of hydraulic pump and getting information from the borehole bottom.

The level of technology

In traditional practice, the production of various forms of mechanized operation was based on oil and water solely through the use of differential pressure. For these purposes in the bottom hole install mechanical, electrical, hydraulic and screw pumps.

To determine which of the methods of artificial lift applied to individual wells of information about the reservoir (pressure, temperature, characteristics of the reservoir fluid and the flow rate). Some of this information (characteristics of fluid and flow rate) can be obtained on the surface during well operation, while the pressure in the reservoir and the temperature recorded in the borehole bottom.

In the prior art there are a large variety of jet pumps for the development, testing, and operation of oil and gas wells, are described in the following U.S. patents: 1,355,606; 1,758,376; 2,041,803; 2,080,623; 2,285,638; 2,287,076; 2,826,994; 3,215,087; 3,234,890; 3,887,008; 4,135,861; ,183,722; 4,293,283; 4,310,288; 4,390,061; 4,441,861; 4,504,195; 4,603,735; 4,605,069; 4,658,693; 4,664,603; 4,726,420; 4,744,730; 4,790,376; 5,055,002; 5,083609; 5,372,190; 5,472,054; 5,651,664; 5,667,364; 6,354,371.

Also in the prior art it is known device hydraulic jet pump for lifting fluids from oil wells (the patent for useful model EC-SMU-01-4158, Ecuador), which is selected as a prototype of the present invention. This invention satisfies the need of the oil industry in a compact mechanism that combines the advantages, such as instant closure of the hole in the bottom at the depth of the pump to reduce the effect of filling and achieving accurate registration parameters for calculation of the characteristics of the reservoir or well. Thus, the jet pump, which is an important part of the present invention has the features of known devices, but in addition to them has distinctive features, which allows its Assembly, the implementation and operation in accordance with the requirements of the mechanism. One of its distinguishing characteristics is the connector located in the lower part of the pump, which provides the possibility of mounting the lower shut-off valve, and also saves the bypass channels of the lower shut-off valve closed; and the presence in the upper part of the pump transition strip that has the screws on the wasp in the process.

Among the most well-known traditional methods of obtaining information about pressure and temperature at the bottom hole can be noted in the following ways:

a. The unit of the measuring devices are fastened with screws on the pipe for which you want the column pipe (large equipment) required for draining the pipe for approximately 10 hours and raising the pipe during the same time period. This procedure applies only to exploratory wells, but not for mining. The pressure of the reservoir to register in a timely manner at a time when a surge in the well starts flowing liquid.

b. Another known method is to use the lower shut-off valve, which use nitrogen to effect the closing, and which has dimensions of approximately 6 meters in length and 100 mm in diameter. But when implementing this method may be uncertainty as a condition of opening or closing cannot be determined, thus it causes difficulty when making operational decisions. In addition, to set the valve requires a lift, which makes this procedure very dangerous.

c. Another known method is associated with the stationary valve installed in the bottom hole (intake valve), which is equipped with a non-passing valve, which is pre-fixed by screws to the TRU is at the desired depth. Removing valve is produced using a cable line, and the process of descent and ascent of the valve takes about 6 hours if the ball valve is lifted from the valve seat. Otherwise, its rise is produced by extracting pipe that is unsafe procedure and is applied with a low formation pressure. If the formation pressure is greater than the hydrostatic pressure of the valve, it opens the valve upward, increasing the specified "content effect", leading to loss of time up to several days. Obviously this is undesirable, because it leads to a considerable loss of production.

None of the above methods known from the prior art, prevents lifting of the fluid and to record information about the well in optimal conditions with proper closing of the bottom of the borehole using a single device. Traditionally, this is performed using independent equipment that delivers the measuring instruments to the bottom of the borehole by means of the cable or pipe and requires additional lift (pump), which makes this procedure even more complicated, slow, dangerous and costly.

Thus, there is a need for a single device and method that allows you to perform one complex function; the rise of the fluid and record the information in the bottom hole by its temporary closure.

It is also necessary to close the bottom hole was instantly to reduce the effect of filling and ensure quick and accurate entry of parameters for calculation of the characteristics of the reservoir or well.

Therefore, the purpose of this invention is to eliminate the disadvantages known from the prior art methods by intelligent device that provides mechanized extraction of oil, as well as the temporary closure of wells in a single device.

More than 25 years experience of the author of an invention in the field of oil production contributed to the development of smart hydraulic pumping device for mechanical extraction of oil from obtaining and recording information in the bottom hole, taking into account the known method of mechanized lifting fluid through the jet pump, the lower shut-off valve for efficient recording of reservoir pressure and temperature through the temporary closure of wells in a quick way.

Disclosure of inventions

This invention relates to a smart hydraulic pumping device for mechanized production of oil and receiving and recording information from the borehole bottom (pressure and temperature) by trial operation, the temporary closure of wells, recovery and equalization in one simple operation, the Received data record and measuring instruments, installed on the smart device, which in the following will determine the maximum inflow of reservoir fluid and other parameters needed for the optimal operation of the well.

This invention can be applied in the exploration, testing and production wells.

Intelligent pumping device according to this invention contains the jet pump connected with the lower shut-off valve by means of intellectual connector, which in turn is connected with a power measuring means through the seal at the bottom, forming one integrated unit. Downhole install smart device by pumping from the surface of the working fluid through hydraulic surface pump, centrifuge, or other at low speed and pressure and go down the pipe prior to its installation in a sliding clutch smart devices.

Intelligent pumping device starts working, when the working fluid (oil or water) is pumped from the surface into the jet pump through the Elevator column at a pressure which is increased up to 3500 psi. Because it's not a standard pressure, it will depend on the maximum flow rate and the desired production volume. Then start lifting fluid to the surface due to the jet effect (prin the IP Venturi) and test wells to determine the maximum flow rate on the surface, which is calculated in the calibration tanks, while measuring instruments installed in the unit, record the pressure and temperature of the stream.

After setting the flow rate at the discretion of the technicians test is finished by stopping the injection from the surface, and at this time the lower shut-off valve performs its function of closing the hole in the bottom, and measuring devices record the pressure of the reservoir, or in other words, the existing pressure in the area from the reservoir to the lower shut-off valve.

During the course of the stream and close the bore of the measuring instruments installed on the gate valve, in addition to recording the pressure flow and pressure in the reservoir, also record the temperature change in each of these cases.

A distinctive feature of this invention is that the closure of the wells in the mine run immediately, thus minimizing specified "content effect". At the end of the injection hydrostatic pressure acts on the top layer of the bottom shut-off valve, lowering the plunger to its seat on the bottom ball, resulting in a complete closure of the lower shut-off valve to start the recovery process pressure in the reservoir, which continues to increase over time until it reaches a maximum value that represents the useful data for the study of the formation.

When the injection pressure is re-applied from the surface, the jet pump again starts to work and created by the Venturi effect vacuum pump lifts the top layer, which is located in the plunger, the spring moves the plunger up and automatically moves from the lower shut-off valve in the open position, the fluid passes through the valve and production resumed.

More particularly the invention relates to extracting a smart hydraulic pumping device to the surface by changing the hydrostatic pressure and the pressure in the reservoir where the pump.

Technical advantages of the present invention is the provision of a method of gathering information about the parameters of the borehole bottom by closing the bottom valve. In particular, can be carried out the collection of information on pressure and temperature, which can be used to determine formation parameters, to calculate the characteristics of the reservoir, to simulate various dynamic and hydrodynamic pressures, all of which are extremely useful when calculating PI (productivity index layer), the study of the formation, to obtain better recovery of oil; as well as in decision making, providing a good investment.

The introduction of the lower shut-off valve in the jet us is, in addition to the other features of this invention is the development of technology, which until now was not known in the oil industry. Due to its design and the possibility of closure, carried out using a plunger and two balls of highly resistant materials, the lower shut-off valve has become more effective. In addition, the lower shut-off valve equipped with a special bypass channel that facilitates the extraction pump to the surface.

Another technical advantage of this invention lies in the fact that you write dynamic pressure or pressure flow and temperature at the depth where you installed intellectual pumping device at the time the automatic opening of the bottom shut-off valve when the injection pressure applied to the nozzle of the jet pump, which leads to the start of the process of lifting fluid through a Venturi. The beginning and the continuation of the write occurs during the whole extraction operations, which can last days, months or even years.

Another technical advantage of the present invention also consists in an automatic closing bottom shut-off valve when the smart device detects the pressure drop downloads and starts the recovery process pressure in the reservoir at the location where you installed the device. This is the time for recording values of reservoir pressure and temperature in the static mode. The operator determines the response time of the valve and closure of the well.

Another technical advantage of the present invention is to minimize the "content effect", because only a momentary closure of the hole in the bottom. In particular, the reduction effect of filling leads to reduced costs, as the downtime and the time works well. This procedure cannot be performed by any known method mechanized operation.

Another technical advantage of the present invention is to lift the pump from the bottom of the borehole after completion of the extraction operations, close the valve and recording options. The smart device of the present invention has a bypass channel for equalization of hydrostatic and pressure, without which it would be impossible to raise the device to the surface. This feature of the invention is different from the traditional methods that require a more lengthy and expensive operations with the use of special equipment.

An additional advantage of this invention is possible in one operation to combine the recording of information about dynamic or hydrostatic pressure of the borehole, formation pressure in the closing period, and temperature in both cases. Collected Yes the data is stored in electronic measuring devices, mounted with the bottom shut-off valve.

Brief description of drawings

In Fig.1 shows a schematic view of an oil well with an intelligent device for mechanized oil production, receiving and recording information from the borehole bottom.

In Fig.2 shows a view of smart devices in the context.

In Fig.3 shows a cross-section of the jet pump and its components.

In Fig.4 shows a detailed view of the housing with the outlet holes.

In Fig.5 shows a detailed view of the block nozzles.

In Fig.6 presents a cross-section of the lower shut-off valve and its components.

In Fig.7 shows the position of the plunger in the open and the closed bottom flap.

Fig.8 is a detailed picture of the connection between intellectual connector and the valve body.

Fig.9 is a detailed image of a bypass channel in the case of intelligent valve.

In Fig.10 shows a cross-section of the hull jet pump and its components.

In Fig.11 shows a cross-section of the block of electronic measuring instruments and their components.

The implementation of the invention

In Fig.1 presents a diagram of the main parts of an oil well to work with an intelligent device that is the object of the present image is etenia.

To install smart devices on the borehole bottom tube 1 must be disconnected from the head 2, part smart devices have inside the head, which is connected with the Elevator column 3 in the lower part, as shown in Fig.1. Should be started dive tubing string 3: moving smart device from the head 2 to the sliding sleeve 4 is carried out by pumping the working fluid through the line injection 5 (water or oil) from the surface using a hydraulic pump, a centrifuge or other, at low pressure (100-200 psi), while the smart device will not reach the depth of the sliding clutch 4 to install it. Seal 6 herringbone type is a seal that prevents the flow of the mixture of the fluid in the zone of the reservoir, as it forms a tight seal between the casing 7 and the Elevator column 3.

Smart hydraulic pumping device in accordance with Fig.2 has the following groups:

group 8: the jet pump;

group 9: the lower shut-off valve;

group 10: the body of the jet pump;

group 11: the block of electronic measuring devices.

Build smart hydraulic pumping device is performed in the following order:

The lower part of the lower shut-off valve 9 is screwed to the intellectual is Oh downhole tube 12. The upper end of the valve is screwed to the outer tube 13, and the jet pump without the fishing neck 14 is injected inside of the outer tube 13 and is connected to the lower shut-off valve 9 through intellectual connector 15. Then the upper packer 16 mounted on the outer tube 13 with the respective seal elements 17, 18 and 19.

Sealing elements, which are located in the upper packer 16 and those that are installed in a downhole tube 12, are identical and are sealed by the seal on the top and bottom sealed surfaces sliding clutch 4. Further, for fixing the jet pump 8 in the housing in the upper packer 16 is set bronze screws, fasten and adjust the fishing neck 14. At the bottom of the tube 12 installing the electronic unit measuring devices 11, at the end of the entire device Assembly, you need to configure, after which it is ready for placement in the well.

This intelligent device is designed with different sizes: for wells with diameter of the column 114, 89 and 73 mm All materials of carbon steel, used in this smart device, have a surface nitriding treatment using gases and salts. After a detailed description of the construction shown in Fig.2, the independent description of each of the above groups of the invention.

In Fig.3 of bragano cross-section of the jet pump 8 and its components.

The fishing neck 14 is an element that is used to retrieve the smart device 20, when due to the accumulation in it or around it carbonates or other solid components, its extraction through hydraulic pressure is impossible. In this case it is necessary to use steel cable for these operations, which are called fishing. Transition extension 21 acts as an extension for Assembly fishing neck 14 and the upper packer and allows to fix the jet pump in the housing due to the clamping pressure of bronze screws 22 on the outer surface of the extension 21 at its work and closed the hole. Also transitive extension 21 cuts bronze screws 22 to open the bypass channel 23 of the lower shut-off valve 9.

The upper packer 16 accommodates the nozzle 24 in the inner part and seal kit 17, 18 and 19 in the outer part, which contains two Chevron seal 18. Chevron seal 18 is centered Central passage 19, which is V-shaped metal ring, and the adjusted limit passage 17, which is also a metal ring. The unit, formed from the elements 17, 18 and 19, creates an airtight seal that provides the direction of the flow of fluid to the nozzle 24. In the lower part of the packer 16 in which R is Solorina nozzle 24, there is a ring seal 25 for sealing.

The nozzle 24 has a conical inner surface, and its smallest diameter can be one of 18 different sizes depending on the production characteristics of the well. This change in diameter during the passage of liquid through the nozzle 24 converts the potential energy of pressure into kinetic energy the velocity of the injected fluid, which is known as the Venturi effect, which creates a vacuum (the pressure difference), passage of the reservoir fluid through the stopper 26 of the nozzle in the nozzle 27. The stopper 26 of the nozzle also serves to separate the nozzle 24 and the nozzle 27, as shown in Fig.3. In the nozzle are mixed pumped working fluid and a fluid operated well.

The nozzle 27 and the nozzle 24 are the main parts of the pump. The efficiency of the jet pump, the rise in production from a well depends on its design. These pump parts are made of tungsten carbide.

The nozzle 27 inside has two compartments: one constant, through which passes the mixture, and the other in the form of a cone formed by the two angles of 2 and 15, designed to convert the kinetic energy into potential. The components of the nozzle are designed to reduce the pressure drop due to friction and increase efficiency of the jet pump. The kinetic energy of the mixture is converted into the mouth of the nozzle in the potential, which leads to increased pressure and reduce speed before entering the diffuser 28, which is a continuation of the nozzle 27. The diffuser 28 is connected to the upper end of the nozzle 27, where the energy increases to a maximum value for the lifting of the mixture of fluids to the surface, overcoming the force of gravity hydrostatic pressure and the pressure drop due to friction. The lower end of the diffuser 28 is connected to the housing 29 with the outlet holes, each link of which has a sealing ring 30 to prevent leakage from both ends of the connection. The mixture flows through the housing 29 with the exhaust hole and out through the space between the Elevator casing 3 and the casing 7; power jet pump will be sufficient for lifting the fluid through this free space to his hit to the head 2, exit to the surface through the flow line 31 and the connection line, which goes to the station control production.

Intellectual connector 15 is fixed with screws to the bottom of the housing 29 with the exhaust holes. This unit provides the passage of fluid from the well from the bottom shut-off valve to the jet pump. In addition, he opens and closes the bypass channel 32 to change the pressure when it is Timo to extract the smart device to the surface.

The outer tube 13 serves as a screw connection between the upper packer 16 and the housing 29 with the exhaust holes, creating a free space between the interior of the outer tube 13, the outer walls of the nozzle 27 and a valve 28, through which the fluid reservoir is circulated for subsequent contact with the nozzle 27 and further to the diffuser 28.

For the jet pump Assembly install the diffuser 28, which has two sealing rings 30 on the terminal parts, then under pressure establish the nozzle 27 in the upper part of which is the stopper 26 of the nozzle, where the nozzle 24. On the inner part of the upper packer 16 is placed a sealing ring 25 and the nozzle 24. On the outer part of the upper packer 16 establish sealing elements in the following order: Central passage 19, the Chevron seal 18 and an end transition 17; transition extension 21 is fixed by screws to the top, and after full build intelligent devices establish a fishing neck 14. To complete the Assembly of the pump casing 29 with the exhaust hole connected to the upper packer 16 through the outer tube 13. Finally, through the intelligent connector 15 jet pump connected to the lower shut-off valve.

In Fig.6 depicts the bottom shut-off valve, which is connected in the upper part with the outer tube 3. The lower shut-off valve is connected to the jet pump and is one of the main parts in this invention. In the housing 33 of the valve are all parts of the valve as shown in Fig.6.

The plunger 34 in the Assembly formed by the two threaded metal parts and contains inside the upper ball 35, which is located on the flattened surface, and the lower part of the plunger forms a seal with the lower ball 36 when moving the plunger 34 down.

The elements 37 of the sealing rings are located on the outer wall of the plunger for the formation of a hermetic seal with the inner surface of the valve body.

A metal sealing ring 38 is located on the downhole tube 12 and acts as a stopper for the bottom of the ball 36, holding it immobile. In the upper part of the metallic sealing ring 38 is spring 39 stainless steel, which pushes the piston 34 upward, while the lower shut-off valve is open and the jet pump is running.

In position, when the lower shut-off valve is closed, the plunger 34 is lowered, compressing the spring 39 to its landing on the lower ball 36.

The balls 35 and 36 are made of tungsten carbide, a material that has high strength and resistance to wear and corrosion, providing a seal type metal-metal-aligned surfaces of the plunger 34.

Downhole samples of the and 12 is connected to the lower shut-off valve, in the lower part of which is located a sealing system 17, 18 and 19, which contains three Chevron seals 18, centered Central passage 19, which is a metal V-ring and aligned end passage 17, which is also a metal ring. The unit, formed from the elements 17, 18 and 19, forms a hermetic seal with the bottom surface of the seal sliding clutch 4 in Fig.1.

To assemble the lower shut-off valve lower ball 36 and the metal sealing ring 38 is placed in a downhole tube 12, and the plunger 34 together with the upper ball 35 on the inside, and in the bypass channel 32 is placed a sealing ring 37. Next, put the plunger 34 in the housing 33 of the valve, install the spring 39 and screwed downhole tube 12 to the housing 33 of the stop valve 9.

In Fig.10 shows a cross-section of the hull jet pump and its components.

In the outer pipe 13 is placed the jet pump, the lower part of the outer tube screwed to the bottom shut-off valve, and in the upper part of connecting with the upper packer 16. In addition, the outer tube has a number of side holes for release of the pumped fluid in the space between the casing 7 and the Elevator column 3.

Inside the upper packer 16 is set to jet pump seals 17, 18 and 19; the exterior of the packer had the t edge which holds the pump when it is docked with a sliding sleeve 4. The lower outer part contains a set of seals 17, 18 and 19, which are mounted by screwing the upper end of the outer tube 13. Seal kit serves as a hermetic seal between the jet pump and the clutch 4. In the upper part of the sides made two screw holes, tightening the screws 22.

In Fig.11 shows a cross-section of the block 40 measuring devices, which is a capsule for protection of electronic measuring devices 41 from shock or vibration. Unit 40 measuring devices combined with downhole tube 12 at its lower end. Unit 40 measuring devices are also equipped with a spring 42, the housing 43 of Teflon MG2, lock nut and container 44. The body 43 of Teflon MG2 constructed from smooth, but resistant to the temperature of the material, and serves to isolate and protect the electronic instrumentation, preventing contact of metal to metal. The channels 45 supply of formation fluid to the measuring devices communicated with the borehole fluid and provide their contact with the measuring instrument 41. It should be noted that the container of the measuring devices is of special construction, which is adapted to the dimensional parameters of electronic measuring devices.

Unit 40 measuring devices also is the tsya holder Chevron seals 17, 18 and 19 in the position of the connection hole stopper 12. This kit seal forms a seal at the bottom of the jet pump together with a sliding sleeve 4; channels for access of fluid from the well to the pump located in the upper part of the body 43 of the block and measuring devices.

For the Assembly block 40 measuring devices 41 are placed in the housing 43 of Teflon MG2, have one spring 42 on each end portion of the measuring devices, enter the measuring instruments in the block 40 and adjust with locking nut.

Electronic measuring devices 41 record and store information about the flow pressure and temperature during operation of the pump, as well as information about restoring the pressure in the reservoir and the temperature when the valve is closed.

Mechanized production of oil

After you install smart hydraulic pumping device 20 in a sliding sleeve 4, the working fluid, which descends through the Elevator column 3, gradually increasing the pressure to the recommended pressure for pilot operation (from 1000 to 3500 psi), is fed into the jet pump through the fishing neck 14 until it reaches the nozzle 24 which converts the potential energy of pressure into kinetic energy due to the Venturi effect, creating a vacuum. At this time the lower shut-off valve automatically from rivets because of created from below by the spring 39, the pressure on the plunger 34. In turn, the plunger lifts the lower ball 36 from its seat, allowing passage of formation fluids from the downhole tube 12 to the interior of the shut-off valve, passing through the interior of the plunger and lifting the top layer 35. Further, the liquid passes through intellectual connector 15, moving in the direction of the outlet housing 29, thus achieving space between the inner surface of the outer pipe 13 and the outer surface of the diffuser 28, to the trajectory at the point of suction pump, which is the stopper 26 of the nozzle. At this point of time the fluid flow is sucked into the nozzle 27 to mix with the injected fluid. This fluid mixture passes through the diffuser 28 and up to the outlet of the housing 29, going towards the free space between the casing 7 and the Elevator column 3 for the final rise to the surface and exit of fluid from the flow line 31.

In the process, smart hydraulic pumping device on the surface of the manufactured product testing, capacity in barrels per hour to obtain an estimate of daily production. This assessment will allow the user to perform the required calculations and installed measurement devices at the well bottom, hydrodynamic recording is providing and the temperature of the formation fluid.

Temporary closure of wells

Temporary closure of the wells produced by closing the bottom valve, refers mainly to the separation pressure in the reservoir from the hydrodynamic pressure of the liquid column in the well, located on a smart device, and the pressure of the formation.

Temporary closure of the wells perform after a certain number of hours of operation of wells, installed by the user, why stop pumping fluid from the surface to the jet pump and close the valve wellhead. At this point, due to the hydraulic pressure of the shut-off valve upper ball 35 together with the plunger 34 is lowered, maintaining the tension of the spring 39 until it snaps into the lower ball 36, thereby closing the lower shut-off valve and automatically blocking the passage of fluid from the well into the jet pump.

The design of the plunger with a double seal system using the upper and lower balls 35 and 36 is new in the present invention, which until then was not known from the prior art. This construction of the plunger ensures a more reliable and effective closure, especially in wells with large pressures in the reservoir, because the lower ball 36 prevents the raising of the reservoir pressure, the top of the ball 35 and the opening of the bottom valve.

During temporary closure of the wells with titsa to a minimum "content effect", allowing you to restore the natural pressure in the reservoir, which increases with time until it reaches the maximum value, which is a very useful information for operators of wells that can calculate the potential wells. The time of closing of the wells determines the operator of the well.

Removing smart devices

After completion of the operations of mining, closure of the well and record the settings for the smart device must be raised to the surface for extraction of measuring instruments of their shell and load the information into the computer.

To retrieve a smart device it is necessary to equalize the pressure above and below the lower shut-off valve through the bypass channel, without removing the intelligent device to the surface would be impossible.

The opening of the bypass channel 32 perform either hydraulically or mechanically. In the first case it is carried out by injection of the working fluid in the reverse direction at low pressure (100-500 psi) through the free space between the tubing casing 3 and the casing 7, so that the jet pump is shifted upwards. In the second case it is performed by means of a cable line, pulling the smart device from the fishing neck.

If any of these procedures, the jet pump to the wives to be shifted upward to a height of 381 mm, cutting off the screws 22. This shift will lead to the intellectual output connector 15 from the housing 33 of the valve and the opening of the bypass channel 32 to equalize the pressure, after which the smart device is released from the clutch 4 and can be lifted hydraulically.

1. Smart device hydraulic pump for oil, retrieve and save information from the borehole bottom, characterized in that it contains jet pump installation, lower shut-off valve and the block with electronic measuring devices that form a single integrated unit, which is driven by the working fluid pumped into the well from the surface to the implementation of mechanized oil production, closure of the borehole bottom, the recovery of the pressure in the reservoir and remove the device to the surface.

2. Smart device hydraulic pump p. 1, wherein the jet pump is connected to the lower shut-off valve by intellectual connector connected to the bottom of the housing with the outlet holes of the jet pump, while in the lower part of the smart connector is connected to the lower shut-off valve, allowing formation fluid to pass through the inner part of the intellectual connector from the bottom shut-off valve to jet the pump; intellectual connector opens and closes the bypass channel so that the pressure equalized, when you want to retrieve your smart device to the surface.

3. Smart device hydraulic pump p. 1, characterized in that the lower shut-off valve is connected with a power measuring devices using a downhole tube, ensuring the passage of the reservoir fluid to the lower shut-off valve, and in the upper threaded part of the downhole tube connected with the lower shut-off valve and the lower part are connected with the unit of measuring instruments; in the upper internal part of the downhole tube has a seat for the bottom of the ball and a metal sealing ring.

4. Smart device hydraulic pump p. 1, wherein the jet pump comprises a fishing neck, transition strip, the upper packer, inside which is placed a nozzle on the outer part of the seal kit, nozzle converts the potential energy of pressure into kinetic energy the velocity of the injected fluid, which is known as the Venturi effect; also, the pump comprises a stopper nozzle; the nozzle, in which are mixed the injected working fluid and the reservoir fluid; a nozzle formed inside the two angles of 2 and 15, which reduces the Yeri pressure due to friction; the pump includes an outer tube, which acts as a threaded connection between the upper packer and the casing with the exhaust holes, forming a free space between the interior of the outer tube and the exterior surfaces of the nozzle, and a diffuser through which the reservoir fluid enters the nozzle and continues to flow into the diffuser, which is a continuation of the nozzle, where the energy increases to a maximum value, providing a mixture rise to the surface; the lower part of the diffuser is connected to the housing with outlet holes, which has a longitudinal inner bore, through which flows the fluid entering the pump and passing through the Central inner channel, releasing transversely working fluid and produced fluid mixed in the nozzle, in the direction of the free space between the casing and tubing of a column.

5. Smart device hydraulic pump p. 1, wherein the jet pump also contains a transitive extension Assembly fishing neck with the upper packer and fixing jet pump in the housing by means of the fastening bronze screws on the outer surface of the transition strip and transition strip adapted for cutting bronze screws at offset pump up when lifting the pump to the surface, and the intellectual is hydrated connector is released from the bypass channel of the lower shut-off valve.

6. Smart device hydraulic pump p. 1, wherein the jet pump includes a housing formed by the outer tube, which is connected to the lower end of the housing bottom shut-off valve and the upper end with the upper packer, which contains two threaded holes, in which twisted the screws.

7. Smart device hydraulic pump p. 1, characterized in that the lower shut-off valve includes a valve body, a plunger Assembly, spring, and upper and lower balls made of tungsten carbide.

8. Smart device hydraulic pump p. 7, characterized in that the plunger Assembly of the lower shut-off valve has two aligned surfaces, on which are mounted upper and lower balls for the hermetic sealing of the bottom shut-off valve.

9. Smart device hydraulic pump p. 1, characterized in that the lower shut-off valve also has a bypass channel located along the peripheral part of the valve body.

10. Smart device hydraulic pump p. 1, characterized in that the unit of the measuring instrument contains electronic measuring instruments pressure and temperature and the input channels to access the reservoir fluid to the measuring instrument, the spring and the body is made of Teflon MG2, which is full of the stew isolates and protects electronic measuring instruments from contact with the metal; in the upper part of the unit of the measuring devices are bolted to the face of the tube, and lock nut locks the measuring devices in the block; and the block instrumentation is also the holder of a set of Chevron seals in position when the unit is screwed to the face of the tube.

11. The oil extraction method and receiving and recording information from the borehole bottom, characterized in that it contains smart device hydraulic pump, in which the jet pump, the lower shut-off valve, and flow meter are connected to each other, forming a single integrated unit, which uses the hydraulic energy of the working fluid pumped into the well from the surface to achieve the following objectives:
- the location of the smart device in the borehole;
- perform mechanical oil extraction and calculation of flow rate and flow pressure and temperature measuring devices;
closing the well and recording the pressure and temperature of the reservoir, and back to the pressure; and
- equalization of pressures and retrieve your smart device to the surface.

12. The oil extraction method and receiving and recording information from the borehole bottom on p. 11, characterized in that the installation of smart devices on the bottom of the borehole begin when the tube usedin is on from the head, place the pump inside the head, which is connected with the Elevator column, and move through the column until the pump is not installed in a sliding sleeve downhole, the move is carried out by pumping the working fluid through the line injection (water or oil) from the surface using a hydraulic pump at low pressure (100-200 psi), while the smart device reaches the sliding clutch to install it.

13. The oil extraction method and receiving and recording information from the borehole bottom on p. 11, characterized in that the mechanized extraction is performed after the installation of smart hydraulic pumping device in a sliding clutch; the working fluid pumped from the surface, gradually increasing pressure (from 1000 to 3500 psi); the working fluid through the fishing neck enters the jet pump until, until it reaches the nozzle, where the conversion of potential energy of pressure into kinetic energy velocity through the Venturi, creating a vacuum; when the lower shut-off valve is automatically opened due to the generated pressure spring from below the plunger, which in turn lifts the bottom ball from its seat, allowing passage of formation fluids from the downhole tube to the interior of the shut-off valve, passing through the inner part of the plunger is lifting the top layer; the liquid then passes through intellectual connector, moving towards the body with outlet holes, thus reaches the space between the inner surface of the outer tube and the outer surface of the diffuser to the trajectory at the point of suction pump, which is the stopper nozzle; at this time the flow is sucked into the nozzle to mix with the injected fluid, the fluid mixture passes through the diffuser and to the housing with outlet holes, leaving a free space between the casing and tubing of a column of products for final lift fluid to the surface and exit flow line.

14. The oil extraction method and receiving and recording information from the borehole bottom by p. 13, characterized in that the position where the lower shut-off valve is open and the liquid rises to the surface, make trial production wells to determine the flow rate, and measuring devices located in the unit, continue to record pressure and temperature.

15. The oil extraction method and receiving and recording information from the borehole bottom on p. 11, characterized in that the temporary closure of boreholes after a period of operation of the well, why stop pumping fluid from the surface to the jet pump and ecrivait valve wellhead, at this point, due to the hydraulic pressure of the shut-off valve upper ball valve with plunger is lowered, maintaining the tension of the spring until the plunger snaps into the bottom ball, thereby closing the lower shut-off valve and automatically blocking the passage of fluid from the reservoir to the jet pump, in this moment begins the process of restoring the pressure in the reservoir, reducing "content effect" to a minimum.

16. The oil extraction method and receiving and recording information from the borehole bottom by p. 15, characterized in that the closing period of the lower shut-off valve and measuring devices record the pressure in the reservoir and the temperature, i.e. the pressure in the interval from the reservoir to the lower shut-off valve, and simultaneously starts the recovery process pressure in the reservoir, which increases over time until it reaches the maximum value.

17. The method according to p. 15, wherein removing the smart device to the surface produced by the equalization of pressure above and below the lower shut-off valve by opening the bypass channel and the injection of the working fluid in the reverse direction at low pressure (100-500 psi) through the free space between the tubing string and the casing, so that the jet pump slip up to a height of 381 mm, cutting off the screw, and intellectual connect the tel out of the valve body, at this point, the bypass channel is open, which leads to the equalization of pressure and the release of smart devices from the clutch and retrieving it to the surface.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: development method of heavy oil or bitumen mine field with controlled production extraction includes construction of the top injector and bottom producer with horizontal sections placed one above the other, injection of heat carrier through the horizontal injector with bed heating by creation of steam chamber and extraction of the product through the bottom producer. Thermograms of steam chamber are taken, the chamber's warm-up state is analysed for uniform heating and available temperature peaks, and considering the obtained thermograms uniform heating of steam chamber is performed by changing zones of product extraction. Before start-up of extraction with permanent taking of thermograms heat carrier is injected to the below horizontal well until the layer between wells is heated. Thereafter thermograms are taken along horizontal boreholes of both wells with identification of interval with maximum temperature between the wells. Then measurement instruments are removed, heat carrier in injected to the injector and pump is run in to the above interval in the producer, product is produced by the pump till pressure communication is set between the wells. The pump is removed from the producer, a pump with fibre-optical cable is run in to the well in order to control thermogram along the whole length of producer and monitor pump movement to less heated intervals in process of oil or bitumen production.

EFFECT: usage of this method allows increase in oil recovery factor and open flow potential due to even heating of the steam chamber using standard equipment.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method consists in pulse lighting and recording of walls of a casing string of a well by means of a pulse light source and a picture telecamera with further processing of the obtained video materials, as per which place and nature of damage to the wall of the well casing string is determined. Before visual investigations are performed, acoustic investigations of intensity of noise emission are performed as to depth and azimuthal angle of the well by means of a point-directed transducer of intensity of noise emission with a directivity pattern coinciding as to direction with the directivity pattern of the pulse light source. With that, recording of walls of the well casing string by means of the picture telecamera is performed when an output signal from the transducer of intensity of noise emission exceeds the specified threshold value.

EFFECT: improving performance of search of location places of damages to a casing string.

5 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to chemical and thermal treatment of a bottom-hole formation zone in developing high-viscosity oil deposits. A hollow cylinder rod is connected to a line of hollow pumping rods. A unit has also a working substance supply unit. This unit is stationary and isolated from a well production gathering line. An inside below an intake screen of the pump, between the cylinder wall and the surface of the hollow rod is divided into two sections. The cylinder rod is common for both sections and extends through a cylinder rod packing. The packing is provided between the sections. The bottom of the cylinder is connected to a tail piece with outlet holes. The tail piece comprises a hollow discharge rod. It is connected to the hollow rod of the pump. A non-return spring-loaded valve is arranged on the outlet of the hollow discharge rod of the pump.

EFFECT: unit comprises the differential sucker-rod pump, a cylinder of which is connected to a flow column; it ensures more reliable operation of the bore-hole sucker-rod pump unit and reducing serviceability.

1 dwg

FIELD: mining.

SUBSTANCE: proposed system comprises surface data receiving and processing unit connected in supply circuit electrical cable - downhole motor (DHM) with downhole telemetry unit (TU) port. Said TU has a through lengthwise hole to control and to transmit to surface data receiving and processing TU, data covering the parameters of top and bottom beds. Note here that TU port is connected via serial data collection and transmission unit, communication interface and power supply with its extra port whereto connected is well bottom bed parameters metering unit (MU) via sealed connector. Said extra port is intended for transmission of requested date from MU to TU. MU and TU are interconnected via sealed connector fitted in TU case cut-out Said telemetry serial data collection and transmission unit can generate packages of data on top and bottom bed transducer parameters from MU and convert said data for transmission to surface data receiving and processing unit via downhole motor supply cable for said data to be recognized for transmission to user.

EFFECT: better manufacturability of system assembly and higher reliability of operation.

7 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is related to the area of well drilling and intended for transfer of well data to the surface through an electromagnetic communication line. The method for transfer of well data through an electromagnetic communication line is suggested by means of current excitation in the formation surrounding the lower part of the drill string. At that current is excited in the formation by EMF of a free-running generator connected to the string and a coaxial ring isolated from the string. Besides, an additional coaxial ring isolated from the string is introduced to the upper assembly of the pipe string and collection of alternating voltage is done from this ring as induced in the formation close to the string surface by flowing current generated by the radiating ring. At that value of the above voltage is modulated by EMF of the free-running generator controlled in compliance with coded bottomhole data. The device for implementation of the above method is also claimed.

EFFECT: improving reliability of data transfer from the bottomhole through the electromagnetic communication line, expansion of its scope of application and simplification of the device design for manufacture.

2 cl, 2 dwg

FIELD: mining.

SUBSTANCE: in killed well temperature is measured, and the temperature change rate is measured in the depth intervals located within the productive formations, and in the depth intervals located in immediate proximity from productive formations. In the depth intervals located within the productive formations, the sections are separated, the temperature change rate in which is much higher than the temperature change rate in the depth intervals located in immediate proximity from productive formations. The numerical model of temperature change in a killed well is developed which takes into account the influence of formation fluid filtering at the temperature change rate in the killed well, the measurements results are compared with the results of numerical simulation and using the best agreement of measurement results and simulation results the filtration rate of formation fluids in the depth intervals located within the of productive formations are determined.

EFFECT: identification of depth intervals, where fluid flow occurs, and estimation of rate of their filtering in the location of observation well.

8 cl, 7 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to hole surveying and is intended for centring of instruments at their displacement along the borehole. The proposed device for centring of the downhole instruments comprises the main and extra systems of convex plate springs. Ends of the said main system of springs are articulated with extreme support sliders siding on a downhole instrument support guide. The number of springs of the extra system equals that of the main system. Note here that the ends of every spring of the said extra system can slide over the guide of the appropriate spring of the main system.

EFFECT: decreased sizes of downhole instruments, expanded applications.

2 cl, 1 dwg

FIELD: mining.

SUBSTANCE: as per one version of implementation, the method involves well shaft drilling by a drilling bit, determination of an axial load on the bit during drilling of the well shaft, determination of pressure drop in the working surface area of the drilling bit during drilling of the well shaft and determination of the corrected axial load on the bit as per a certain axial load on the bit and a certain pressure drop.

EFFECT: creation of improved drilling bit and method allowing to correct changes in measurement results of an axial load and torque, which occur due to pressure drop in the drilling bit.

20 cl, 6 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed process comprises series of thermometer measurements at quasistationary injection in tubing in interval from its funnel upward to 30-40 m. these measurements are used to define casing pipe tightness above tubing funnel.

EFFECT: accelerated determination.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: this invention is referred to methods for determining properties of productive formations at oil and gas deposits, in particular to an assessment of their properties. The method for determining the properties of a productive formation drilled by a well includes injection of fluid with a variety of tracer agents of a submicron size to the well bore and productive formation, waiting of flowback and determination of the formation properties. These properties are defined by an analysis of variations in the tracer distribution function against the size and type in the injected and produced fluid.

EFFECT: more efficient assessment of the porous formation properties.

18 cl

FIELD: chemistry.

SUBSTANCE: method comprises drying a polymer solution until complete evaporation of water; heating the polymer formed after drying the polymer solution, and determining the temperature range of active decomposition of the polymer at a given heating rate, as well as the degree of decomposition of the polymer in said temperature range; drying, performing thermal analysis in the temperature range which includes the temperature range of active decomposition of the polymer, and calculating weight loss of a weighed amount of the sample of porous medium and a weighed amount of the same sample of porous medium after pumping the polymer solution; determining the weight concentration of the polymer that has penetrated the porous medium based on the obtained values.

EFFECT: high accuracy of the obtained data and rapid analysis.

6 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves destruction of massif of a hydrate-containing manifold with high-pressure water jets, formation from destructed material of pulp in a near-bottom volume covered with a dome, lifting of the pulp containing gas and gas-hydrate onto a floating structure via a pipeline and separation of the pulp into gas, water and solid material with gas transfer to a state suitable for transportation. According to the invention, massif of the hydrate-containing manifold is converted to a solid body-liquid fine suspension with gas-hydrate particle size of 10-20 mcm. For that purpose, it is influenced with high-pressure jets formed in the near-bottom volume covered with the dome. Besides, the volume of the pulp formed in this volume is treated with an ultrasound with parameters causing cavitation effects in it. A hydrate-containing suspension is formed with content in it of a disperse phase of gas-hydrate of up to 20-25%. Capacity of destruction devices of massif of the hydrate-containing manifold is controlled proportionally to pressure in the pipeline in its near-bottom section. An ice pulp formed at dissociation of the gas hydrate is used for cooling of compressed gas - a product of dissociation of a gas-hydrate pulp.

EFFECT: increasing well performance efficiency of a gas-hydrate deposit.

6 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: according to the method in a watered part of a formation at first remedial cementing is made to cut the inflow of stratal water off and to isolate the watered part of the formation by a cement plug setting. A geophysical survey is performed in the non-watered part of the formation. Intervals are identified with bigger permeability of the productive formation areas. An assembly with an end-to-end channel is run in at the drill string and set by means of an anchor packer device. It is oriented towards one of the permeable areas of the productive formation. Mill equipment with a downhole drilling motor, flexible shaft and cutter is run in to the well at a flexible tube. An opening is cut in the production string wall with the use of an oil-based solution. The mill equipment is run out from the well. A jet nozzle is run in to the well up to a discharge outlet of the guide assembly. Cement stone and rock is washed out behind the production string so that a radial borehole is formed. The radial borehole treatment is made through the jet nozzle by an acid composition so that a cavern is formed. The flexible pipe with the jet nozzle is lifted out of the well. The guide assembly is rotated, for example, per 180 degrees and similar operations are performed to tunnel the next radial borehole. The guide assembly is lifted to the height of the next interval in the permeable areas of the productive formation and the similar operations are performed to tunnel the next radial boreholes. Up to the upper radial boreholes of the well an oil string is run in and the above string is made of tubing strings with the area of a clearance hole equal to the sum of all the clearance holes in the radial boreholes. The well is brought to operation.

EFFECT: improved efficiency of the method due to the removal of conditions for swelling of clays contained in the productive formation at tunnelling the radial borehole in low-permeable terrigenous deposits of water-swelling clays.

3 ex, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: according to the method a removable whipstock is installed. Then a window is cut in boring case. An offshoot is drilled from the main borehole. Offshoot drilling is made with running in of the boring case, its continuous cementing, perforation and provision of required reliability of attachment in the area of offshoot tracking. At that behind-the-casing flows of gas and liquid mixture are excluded. To this end upon window cutting a cement ring is cut in the boring casing and adjoining soil is cut as well in direction of offshoot drilling forming a cavern with diameter exceeding diameter of the offshoot. The cavern is poured with solid sealing compound and offshoot is drilled through the cavern. Downhole pumping equipment is placed in the main borehole and oil is extracted from the main borehole and offshoot.

EFFECT: increased oil extraction from offshoot at operated main borehole.

3 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to the oil and gas industry and can be used in particular to prolong anhydrous operation conditions of oil producers. The substance of the invention: a device comprises a pipe string lowered into a well, a packer with a sealing member and a flow shutdown mounted therein; a hollow body comprises a pipe concentric with its axis. From above, this pipe is rigidly connected to the pipe string, and from below - to a piston. The pipe and piston are axially movable in relation to the hollow body from the flow shutdown. The hollow body from the flow shutdown is blind off from below; its holes are inclined at 120 to each other in three vertical planes along the perimeter of the hollow body. The first vertical plane comprises two holes above and below the sealing element of the packer, respectively. One hole is formed in the second vertical plane below the sealing element of the packer. The third vertical plane has one hole above the sealing element of the packer. The piston has a slot configured to provide an alternative connection of the holes of the vertical planes to the pipe inside when the pipe string and piston move axially and rotate about the hollow body of the flow shutdown. The hollow body of the flow shutdown is provided with an outer long slot inside from below, while the piston at the bottom has three inner long grooves inclined at 120 to each other along the perimeter; the outer long slot of the hollow body of the flow shutdown can be fixed in any of the three inner long grooves of the piston.

EFFECT: simplifying the operational structure of the device, improving its reliability and enhancing the same.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to chemical and thermal treatment of a bottom-hole formation zone in developing high-viscosity oil deposits. A hollow cylinder rod is connected to a line of hollow pumping rods. A unit has also a working substance supply unit. This unit is stationary and isolated from a well production gathering line. An inside below an intake screen of the pump, between the cylinder wall and the surface of the hollow rod is divided into two sections. The cylinder rod is common for both sections and extends through a cylinder rod packing. The packing is provided between the sections. The bottom of the cylinder is connected to a tail piece with outlet holes. The tail piece comprises a hollow discharge rod. It is connected to the hollow rod of the pump. A non-return spring-loaded valve is arranged on the outlet of the hollow discharge rod of the pump.

EFFECT: unit comprises the differential sucker-rod pump, a cylinder of which is connected to a flow column; it ensures more reliable operation of the bore-hole sucker-rod pump unit and reducing serviceability.

1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to recovery of said well located at multihorizon field. Proposed process comprises injection of isolating composition via well tubing string and fitting of "liquid" packer below tubing string shoe. Then, flow tubing above "liquid" packer is filled with killing fluid. Tubing string is withdrawn from the well. Deflector wedge is fitted inside tubing string. Lateral opening is cut in tubing string above overlaying high-pressure productive bed. Side hole is bored through said bed to extend through its entire depth to make side hole face occur nearby said high-pressure productive bed. Casing string with filter is lowered into bored side hole. Casing string is cemented above filter to the roof of top high-pressure productive bed and said wedge is withdrawn. Hanger with latch joint arranged at its inner surface is lowered on temporary string. Said hanger is fitted inside flow string under side opening. Oil string provided with side opening is lowered into flow string till interaction with latch device so that side openings of both strings are located opposite each other. Then, influx from lateral hole is initiated to remove killing fluid from the well. Then, liner with centring funnel at its shoe and packer hanger at its top is lowered on flexible pipe inside oil string to "liquid" packer. Solvent is injected via said liner. Said solvent destructs said "liquid" packer its residues falling on the face. Now liner is lowered to bottom holes of perforation interval of the bottom low-pressure productive bed. Liner is suspended in oil string above side opening of oil string. Flexible pipe is withdrawn from the well to place the well in operation.

EFFECT: efficient recovery.

7 dwg

FIELD: transport.

SUBSTANCE: method for installation of rapid-moving eduction column includes passing the rapid-moving column into a well, engagement of key for interaction with occlusion with nipple occlusion, extending interacting with profile key on rapid-moving column to interact with corresponding stopping profile in well shaft wall and thus supporting the rapid-moving column. In this method, interaction of the key with nipple occlusion causes extending the key interacting with profile into engagement with stopping profile.

EFFECT: higher reliability of holding the rapid-moving column while keeping relatively large flow diameter of the column.

29 cl, 8 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves dilution of salt rock with fresh or subsaline water by cyclic action on the formation, each of which includes pumping of a working agent to the saline oil formation through a well, closure of the well for the time of salt rock dilution, extraction of liquid from the formation through the same well. Cycles of action on the deposit are repeated till full coverage of the saline formation by action before opening of oil deposits contained in it and production of all the extracted oil deposits. Water pumping to the formation is performed at maximum possible constant bottom-hole pressure till reduction of the well water intake capacity by 2-8 times in comparison to its value at the pumping beginning, and extraction of liquid from the formation is performed at minimum possible constant bottom-hole pressure before the liquid with volume of at least 1.1-1.5 volumes of the fresh or subsaline water pumped to the formation earlier is removed to the surface.

EFFECT: increasing permeability of a saline formation throughout the area of its propagation, increasing productivity of production wells, increasing the coverage of the formation by action, volume of the removed oil deposits and acceleration of development rates.

4 cl, 1 tbl

FIELD: oil and gas industry.

SUBSTANCE: invention relates to submersible pumping units for operation of wells, where it is necessary to increase the differential pressure drawdown, without deepening of submersible pumping unit, and/or with unsealed production casing. The unit for oil-well operation includes the tubing string, electric submersible cable, electric submersible pump, the hydroprotection and submersible electric motor of which are encapsulated in the pressure-tight housing, which is tightly closed on the housing of the input unit of the electric submersible pump, the liner consisting from the pipe string the top part of which through the bushing is tightly connected to the bottom part of the pressure-tight housing, and in the bottom part of the liner the branch pipe with external sealing elements is located. The unit contains at least one packer with internal through passage channel with the diameter allowing to pass through the packer the tool, equipment and instruments, without extracting the packer. The sealing unit for the tight connection with the branch pipe of the liner is located either in the packer housing, or in the device below or above the packer.

EFFECT: improvement of performance of recovery of formation fluid from the wells.

1 dwg

FIELD: oil extractive industry.

SUBSTANCE: method includes lowering a tail piece into well with temperature, electric conductivity and pressure sensors placed on tail piece along its length. Pressure sensors are used in amount no less than three and placed at fixed distances from each other. After that, continuously during whole duration of well operation between maintenance procedures, temperature, conductivity of well fluid, absolute value of face pressure and difference of pressures along depth of well in area of productive bed are recorded. Different combinations of pairs of pressure sensors are used for determining special and average values of well fluid density. When absolute pit-face pressure is lower then saturation pressure for well fluid by gas and/or when average values of density deviate from well fluid preset limits and/or when its conductivity deviates from preset limits, adjustment of well operation mode is performed.

EFFECT: higher efficiency, higher safety.

2 cl

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