Well flow control method and device
FIELD: oil and gas industry.
SUBSTANCE: typical well operating equipment can include separator for separation of water from oil, in which the produced mixture of fluid media is obtained and mixture is divided into the corresponding water and oil flows. Water flow can be pumped back to the well. For that purpose, well system for water pumping speed control back to the well can be developed. Group of inventions provides the improvement of well flow control efficiency. Essence of inventions: well equipment designed for receiving fluid medium flows through the first and the second fluid medium flow passage channels is arranged in the well. The above equipment includes flow separation control having the device connected to the first channel and the device connected to the second channel, which are interconnected. Outlet flows in the first and the second channels are controlled by means of the control.
EFFECT: increasing outlet flow in one of the first and second channels in response to increase in outlet flow in the other of the first and the second channels by means of action on one of the above devices to keep constant ratio of outlet flows in the above channels.
16 cl, 6 dwg
The present invention relates to a method and system for control of flow of fluid in the well.
Well there are various tasks that are associated with running streams. For example, a typical operational equipment of the well may include a separator for separating water from oil, which receives the extracted mixture of fluid and separates the mixture into corresponding streams of water and oil. The flow of water may be pumped back into the well, and it may be well developed system for regulating the rate of injection of water back into the well.
The usual method of flow control in the environment of the wells associated with the use of the device, creating a loss, such as nozzles or other restrictions. The size of the duct in the device can determine, for example, using a simple hydraulic calculations that are based on the assumption that the downhole hydraulic parameters are relatively unchanging in time. However, when the pressure and/or flow characteristics in one part of the hydraulic system is changed, the entire balance of the flow may be compromised, since the calculated size is no longer correct.
Thus, a need exists for improved methods of control flow in the well.
Brief description of the invention
According to the image the structure created way flow control fluid in the borehole, when placed in the well downhole equipment for receiving flows through the first and second channels for passing the flow of fluid media containing regulator separation of the flow interacting with the device associated with the first channel, and a device associated with the second channel, using a regulator to regulate the output streams in the first and second channels so that increased output in one of the first and second channels in response to the increase in output in the other of the first and second channels by pressing on one of these devices for maintaining constant the ratio of output flows in these channels.
As you can use the hardware flow divider.
In the process, you can adjust these output streams so that their ratio is essentially not dependent on the pressure downstream from the point at which the regulation.
In the process, you can create output streams from a single input stream or from multiple input streams.
As the equipment you can use at least one hydrocyclone for receiving at least one of the threads, or piping for feeding at least one stream from the well to the surface or, at least one pipeline for injection, at least one of the threads in the hole.
Threads can be created by a separator fluid. According to the invention created downhole system for control of flow of fluid in the well containing the first and second channels located in the bore for passage of fluid flows, and a regulator of the flow separation for regulating the ratio of the output streams in the first and second channels, interacting with the device associated with the first channel, and a device associated with the second channel, and the controller is able to regulate the output streams in the first and second channel in such a way that increases the output stream in one of the first and second channels in response to the increase in output in the other of the first and second channels by pressing on one of the first and second devices for maintaining constant the ratio of output flows in these channels.
The system can include a flow divider.
At least one of the first and second channels can skip at least one flow from the well to the surface.
The system may further comprise downhole equipment for feeding at least one stream to the flow.
The flow regulator may include a mechanical the mechanical device or Venturi.
The first channel can be designed for the passage of well fluid produced in the borehole to the surface, and the second channel can be used for the passage of water extracted in the hole, back into the well.
Advantages and other features of the present invention will be apparent from the following drawings, descriptions and claims.
BRIEF DESCRIPTION of DRAWINGS
Figure 1 depicts a block diagram of a method of flow control in the borehole according to the variant of the present invention.
Figure 2 - schematic view of a system for control of flow in the well created by a single input flow according to a variant of the present invention.
Figure 3 - schematic view of a system for control of flow in the well created by multiple threads at the input according to a variant of the present invention.
4 is a schematic view of the control flow separation on the basis of a Venturi according to the variant of the present invention.
5 is a schematic view of the regulator of the flow separation on the basis of the mechanical feedback according to a variant of the present invention.
6 is a schematic view of a borehole according to a variant of the present invention.
According to variants of the present invention flows in the downhole environment is controlled by adjusting the flow ratio. Thus, this approach is to overcome the disadvantages of conventional downhole hydraulic systems in which the dimensions of the nozzle and other hydraulic parameters laid under the assumption that the costs, pressure and other downhole parameters, changes will not occur.
More specifically, as shown in figure 1, the method 10 according to variants of the present invention includes creating at the stage 14 in the bore of the hydraulic system, which includes communicating channels for the passage of threads. The ratio of the flow regulating stage 16 so that this ratio remains relatively constant and is not sensitive to changes in pressure and/or flow rate in the hydraulic system.
As a more concrete example, figure 2 shows a system 30 for regulating flow in a borehole according to some variants of the present invention. The system 30 includes two cross-connected hydraulic subsystem control flow, which regulate output streams 60 and 70 that are generated from the input stream 40. More specifically, the input stream 40 (coming through the pipeline 34) is divided into two intermediate stream 42 and 46 is supplied through pipes 44 and 48, respectively, to the controller 50 flow (controller 50A is designed to control the flow 46, and the controller 50b is designed to control the flow 42). The controller 50b, driving the intermediate flow 42, creates an output stream 60, and the controller 50A, intermediate driving the m stream 46, creates an output stream 70.
The sensors 54A, 54b thread set up to define the threads 46 and 42, respectively, and create a positive feedback regulator 50 flow in another channel. Thus, the controller 50 controls the output stream 70 on the basis of the output stream 60, which is determined by the sensor 54b. Similarly, the controller 50b regulates the output flow 60 on the basis of the output stream 70, defined by the sensor 54A. Thanks to the positive feedback generated by this control scheme, the controller 50 of the flow increases the output stream 70 in response to the detection of an increase of the output stream 60. Similarly, the controller 50b of the flow increases the output stream 60 in response to a detected increase in the output stream 70.
Although figure 2 shows the control circuit for use with a single input stream, in other embodiments of the invention, such a control scheme can be used to control the relations of threads created parallel input streams. More specifically, figure 3 shows a variant of this system 76 according to some variants of the present invention. System 76 receives parallel input streams 78. System 76 may include, for example, a passive device 74, which regulates the resulting output streams 80, received in response to the presence of parallel input streams 78, so, th is the ratio of output streams 80 is relatively constant. So, for the two output streams Q1and Q2system 76 essentially does the following equality:
Q1/Q2=k (equation 1),
where "k" is a constant.
As a more specific example of a passive device 74 (Fig 3) according to some variants of the present invention may be a Venturi or mechanism of the measuring diaphragm. For example, figure 4 shows a passive, built on the Venturi controller 100 of the flow separation according to variants of the present invention. The controller 100 receives the input stream 104 (for this example) at the input 105. The input stream 104 flows through the main channel of the tube 110 Venturi to create a corresponding output stream 108 at the output 107. Tube 110 Venturi includes a suction inlet 115, making the suction force to the piston 120 in response to the presence in the main channel of the tube 110 Venturi. This suction created by the flow available in the main channel of the tube 110 Venturi causes the piston to overcome the resistance of springs 140 and move to open the channel 117 and flow. Channel 117, in turn, communicates with the inlet 105. Thus, for a given flow through the tube 110 Venturi opens the message through the channel 117 to create a corresponding thread on another output 131 of the controller 100. When the output stream 108 is increased, this PR is leads to a corresponding increase in suction line 115 suction for further opening of the channel 117 for further increase in the flow 130. Thus, the controller 100 creates a positive feedback for regulating the ratio of output streams 108 and 130 so that it is relatively constant.
It should be noted that the controller 100 shown in figure 4 and described merely to illustrate the passive flow divider or flow regulator that can be used in the downhole environment according to some variants of the present invention. In other embodiments of the present invention can be used with other passive or active flow control.
Figure 5 as another variant of the present invention shows a system 150, which uses two dimensional device 160 to regulate the ratio of the two output streams 180. Essentially, the bulk of the device 160 include blades or turbines, which rotate in response to the incoming input stream 152. Due to the mechanical connection 170 between volumetric devices 160 their rotation is controlled partly through positive feedback from other volumetric device 160. Thus, increasing the flow through one volumetric unit 160 causes a corresponding increase in flow through another bulky device 160.
The above-described control flow can be used in the well for various tasks. As a concrete example of some options n the standing of the invention, such systems flow control can be used to separate the well water from oil. The basic principle is the adoption of produced fluid (a mixture of oil and water in which the water content is usually eighty percent or more) and pumping the extracted fluid through the device, which separates the water from the mixture and inject water into the zone of sediment in the well. As a more concrete example, figure 6 shows the well 200, containing the controller 244 split stream according to the variants of the present invention.
Well 200 contains productive zone 220 located below the lower packer 240, and an area of 260 water drainage, located between the lower packer 240 and the upper packer 241. The pump 222 wells 200 receives the extracted mixture 221 downhole fluid containing oil and water. The pump 222 creates an output stream 230, which enters the separator 234, separating oil from water, which according to variants of the present invention may be a hydrocyclone. Hydrocyclone 234 creates two streams: a stream of water and the flow of oil.
Without proper regulation of the flow ratio of oil and water may experience a few problems. For example, if the number of extracted water will increase more than expected, to prevent water flow on the surface of the well 200, the speed with which the water is pumped back into the zone 260 water drainage, should be increased. If water production is substantially less than expected the axis, in this zone 260 can tap to pump oil. Therefore, by controlling the ratio of the flows of oil and water efficiency removal of water and oil rises to the maximum.
As shown in Fig.6, the controller 244 streams produces a stream 270 water pipeline 250 is fed into the zone 260 water drainage, and the controller 244 creates a thread 217 oil by pipeline, or the production string 215 is applied to the surface.
So, the General purpose of the flow regulator is to maintain the ratio of the flow separation at a constant level in the environment of the well. The flow regulator determines changes in flow or pressure and responds by maintaining the ratio of the flows. This design should be contrasted with the approach according to which the design of the hydraulic system, based on an assumed (but probably incorrect) model of the flow separation, use the jets loss to forcibly separate thread or placed in the system unit, which removes the water. The latter approach can be significantly more complex than using the controller to separate thread, because this approach will require sensors for water and feedback on the valve that controls the flow.
When using controllers in the environment occurs well bore is only practical questions of a General nature, and specific tasks. Devices are passive (i.e. they do not require energy). Therefore, in order to influence the flow distribution, you must do the work, which is based on the losses in the device for measuring the flow (which can be small if you use a Venturi tube), especially if the controller thread is to throttle the flow (primarily as a partially closed valve). The greater the degree of control should reach the device, the greater the loss. Therefore, significant flow separation under adverse pressure drops will create the greatest drop in pressure on the device.
The flow control can have moving parts to limit the flow, and, consequently, the presence of solid particles in the environment well can be dangerous and to exclude the possibility of applying flow control volume type. Solid particles can also pose a problem for the flow control of the hydraulic type, since the flow velocity through the flow sensor and the flow is high. Usually to create sufficient hydraulic forces in the hydraulic system feedback using the flow velocity of several meters per second. The upper boundary of the flow rate may be limited by factors such as erosion and potential jamming of moving parts high is iskorosten stream.
The device may have a finite dynamic range depending on theDregarding the characteristics of the flow controllers flow, but one device can cover flow separation in the ratio of 10:1 and the change of pressure in one of the flows downstream.
Using the controller to the flow separation after separator that separates oil and water, regardless of whether he refers to the gravitational type, is a hydrocyclone or a rotating cyclone, you may experience other difficulties. First, the pressure in the two separated flows may not necessarily be the same, and, secondly, the density of the two streams may be different. The pressure difference at the inlet can be compensated by the design of the flow regulator in one or both lines either in the form of a correction in the controller thread, if the difference is small, either in the form of device loss (for example, fixed jet) in line pressure.
The use of the hydraulic control associated with the presence of the flow sensor, the characteristics of which are proportional to the square root of the density. Therefore, differences and changes in density in one or both lines affect the management, but if you have some knowledge about the initial properties of the fluid, it is possible to set the initial installation to account for the initial conditions and the square is Oren reduces the sensitivity to this effect. In this configuration, the sensor flow line of the fluid, rich in oil, affects the flow line of the fluid rich in water and Vice versa, so there is a combined effect of the density contrast between the two lines.
Although the present invention has been described in relation to a limited number of options, specialists from the present description will be clear to numerous modifications and variations of the present invention. All such modifications and variants are included within the inventive idea and scope of the present invention covered by the appended claims.
1. The method of controlling the flows of fluid in the borehole, which is placed in the well downhole equipment for receiving fluid flows through the first and second channels for passing the flow of fluid media containing regulator separation of the flow interacting with the device associated with the first channel, and a device associated with the second channel, using a regulator to regulate the output streams in the first and second channels so that increased output in one of the first and second channels in response to the increase in output in the other of the first and second channels by pressing on one of these device for maintaining constant soothes the of output flows in these channels.
2. The method according to claim 1, in which the equipment used by the flow divider.
3. The method according to claim 1, in which regulate these output streams so that their ratio is essentially not dependent on the pressure downstream from the point at which the regulation.
4. The method according to claim 1, wherein creating the output streams from a single input stream.
5. The method according to claim 1, wherein creating the output streams from multiple input streams.
6. The method according to claim 1, in which the equipment is used, at least one hydrocyclone for receiving at least one of the threads.
7. The method according to claim 1, in which the equipment used by the pipeline for supplying at least one stream from the well to the surface.
8. The method according to claim 1, in which the equipment is used, at least one pipeline for injection, at least one of the threads in the hole.
9. The method according to claim 1, in which threads are created by a separator fluid.
10. Downhole system for control of flow of fluid in the well containing the first and second channels located in the bore for the passage of streams of fluid, and a controller for dividing the stream for regulating the ratio of the output streams in the first and second channels, interacting with the device, contact the TES with the first channel, and the device associated with the second channel, and the controller is able to regulate the output streams in the first and second channel in such a way that increases the output stream in one of the first and second channels in response to the increase in output in the other of the first and second channels by pressing on one of the first and second devices for maintaining constant the ratio of output flows in these channels.
11. The system of claim 10, which contains the flow divider.
12. The system of claim 10, in which at least one of the first and second channel capable of transmitting at least one stream from the well to the surface.
13. The system of claim 10 additionally containing downhole equipment for feeding at least one stream to the flow.
14. The system of claim 10, in which the flow regulator includes a mechanical device.
15. The system of claim 10, in which the flow regulator includes a Venturi tube.
16. The system of claim 10, in which the first channel is intended for the passage of well fluid produced in the borehole to the surface, and the second channel is designed to pass water, extracted in the hole, back into the well.
FIELD: oil industry.
SUBSTANCE: device refers to the oil industry and can be used when the fluid is pumped from the oil wells with a high gas content by using the electric-centrifugal pump equipment. Fluid pumping-out method by using electric-centerfugal equipment is done by the inlet of the gas liquid mixture in the gas separator, rising its pressure in the feed screw 5, gas separator 7 gas liquid mixture stream roolup, stream separation followed by the outlet of the separated gas to the annular space 12 and inlet of the gas-free fluid in the electric-centrifugal pump. In the pumping well's limited radial dimensions, in advance, before placing the electric-centerfugal equipment in the pumping well, the gas liquid mixture inlet range is determined, for each value of this range, feed-screw 5 and gas separator 7 geometric measurements are calculated and then the unit is completed consisting the batch of the calculated feed-screws 5 for each inlet value within one pumping well measurements.
EFFECT: increased gas separator reliability and support of the range of the saturated gas content in the gas liquid mixture.
4 cl, 3 dwg
SUBSTANCE: well sand separator comprises a body, a lower double-sided and intermediate subs with transverse and longitudinal channels and tubes for the descending flow, trap chambers. A part of the lower double-sided sub arranged below the transverse channels is made of large diameter compared to its upper part. At the same time two nets with a spiral between them are placed onto this part of the lower sub, and the external sub is equipped with a trap chamber.
EFFECT: reduced concentration of sand at the outlet from the separator with preservation of device throughput in process of operation.
FIELD: engines and pumps.
SUBSTANCE: invention can be used for pumping fluids containing mechanical impurities from wells. Deep-well oil extraction pumping unit comprises pump with submerged motor with housing communicated with pump inlet in its top, and in, its bottom, with outlet of purified fluid from separator, and sump of mechanical impurities. Gravity separator of mechanical impurities consists of coaxially arranged pipes. Inner pipe is coupled with outer pipe by coupling. Outer pipe lower section is located below coupling but above inner pipe lower end face. Inner pipe lower section communicates bottom hole with pump intake via casing. Sump of mechanical impurities represents a continuation of gravity separator outer pipe and is provided with spring-loaded valve arranged at the sump bottom. Distance from bottom hole pump unit to the valve exceeds that from said unit to perforation spacing.
EFFECT: higher efficiency and reliability
FIELD: oil-and gas industry.
SUBSTANCE: gas tank contains cylindrical case and a shaft, on which an inlet unit located sequentially in relation to a flow direction, a pressure unit, a separation unit and an separated gas withdrawal in to a hole clearance outlet unit. The separation unit performed as a screw with a variable tooth spacing, which blade forms a constant or monotonous decreasing from the inlet to the outlet angle in diapason from 90 to 30°, with in a meridian cross section rotation axis, at that the screw blade in the cross section perpendicular to the rotation axis, executed with a reducer to a periphery. The cross section ages are hollowed to the rotation side with creation of an angle between tangent line to the cross section and on normal to the rotation axis, the angle is not greater than 90°.
EFFECT: invention of the gas tank, which can operate in liquid, containing abrasive particles, for along time without failure.
FIELD: oil-and gas industry.
SUBSTANCE: device contains a void chamber with a hole, equipped with a shut off valve in its bottom part, a pipe for a deposit collection. Between the case and the pipe a channel formed, which entrance located over the possible deposit layer, and exit - directly over the shut off valve. In the deposit collection pipe are separated outlets for the pipes cavity connection to the channel between the case and the pipe.
EFFECT: deposit withdrawal technical efficiency increase.
2 cl, 3 dwg
FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to gas-and-oil producing industry, particularly to extraction of watered oil and utilisation of produced water. Unit contains packer installed between top and bottom stratums, top and bottom multidirectional screw pumps, downed on production tubing into well and installed lower than packer and installed higher than packer, pumps drive, located on surface. Inlet of bottom pump is located lower than dynamic head of exuded under pressure action water from water-oil mixture of top stratum, and output is communicated to under-packer space. Additionally input of top pump is located higher than dynamic head of exuded water, and output is communicated to production tubing for lifting of watered oil on surface of well. Worm shaft of top pump and worm shaft of bottom pump, twisted to side opposite, are connected by rod, and casings of top and bottom pumps- by coupling bushing. Rod and coupling bushing are implemented with ability of regulation of length and fixation for achievement of required distance between inputs of pumps. Correlation of productivities of top and bottom pumps is selected depending on amount of received water into well with condition of providing of specific gravity separation of water-oil mixture of top stratum, in order to eliminate water catch by top pump and of oil - by bottom pump. Total capacity of pumps is selected so that it provides dynamic head of exuded water lower than top stratum, that eliminates formation of "aquatic wedge" on the opposite side to top productive stratum, providing increasing of operation life for oil extraction.
EFFECT: effectiveness increase and design simplification of the device.
4 cl, 1 dwg
FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to gas-and-oil producing industry, particularly to winning of water-cut oil and utilisation of produced water. Unit includes packer, installed between top and bottom stratums, top and bottom pumps with worm shafts, blown down on tubing string into well and installed higher than packer, pumps drive, located on surface. Inlet of bottom pump is located lower than dynamic head of water precipitated under action of gravitation from water-oil mixture of top stratum. Outlet of this pump is communicated to under-packer space. Additionally inlet of top pump is located higher than dynamic head of precipitated water, and outlet is communicated to tubing string. Between worm shafts it is installed reducer, input shaft of which is connected to bottom of top worm shaft, and outlet - with top of bottom worm shafts of pumps. Reducer body is rigidly connected to pipe lift string, and its gear ratio is selected so that correlation of efficiency of top and bottom pumps corresponds the amount correlation of supply into well of water and oil with condition of providing of gravity separation of water-oil mixture of top stratum at opposite rotation of worm shafts. Pipe lift string is implemented with ability of rotation under action of additional drive, located on surface.
EFFECT: design simplification, lighting of service and regulation ensured by placement of drive on wellhead, and also fitting simplification of pumps of required efficiency subject to water cut of top stratum products.
FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to petroleum industry and can be used for operation of high-flooded wells. Unit with double-acting pump for well with boring casing, two uncovers and packer, located between uncovers, contains piston, cylinder with bottom forcing valve, top and bottom inlet openings with suction valves, located over packer and, agreeably, higher and lower the piston, plunger with top delivery valve, implemented, as the piston, with ability of reciprocating motion, pipe string, on which into well it is chuted sucker-rod pump, inlet of which by means of pipe string is communicated through the top pressure valve to the wellhead, and through the bottom pressure valve - to under packer space. According to the invention piston is implemented with the ability of sequence for plunger upward ensured by pressure drop over this piston and under this piston up to intercommunication of piston chamber to top inlet opening for inflow through this hole of oil into piston chamber until, plunger would stop uppermost position, and its following displacement downward by plunger under weight action of strings up to its downward most position. Additionally at increasing of water cut of oil it is provided ability of strings allowance downward, and at reduction of water cut - grasp of strings.
EFFECT: effectiveness increase of oil extraction from watered field well ensured by ability of changing during the process of well operation of liquid amount percentage, elevated into mouth, and liquid amount, pumped into underseam at changing of water cut of well products.
2 cl, 3 dwg
FIELD: oil and gas production.
SUBSTANCE: invention refers to pump equipment engineering and can be implemented at production of oil with high contents of gas and abrasive particles. The gas separator consists of a cylinder case and a shaft whereon an input unit, a pressure unit, a separating unit and a unit of separated gas withdrawal into annular space are arranged successively downstream. The pressure unit is made in form of at least one axial step consisting of a working wheel in form of a bushing with blades and of a directing device. Minimal angle of the working wheel between tangent to a skeleton line of the blade and plane perpendicular to rotation axis increases 1.2-4.0 times in the direction from flow inlet to outlet. Length of flowing channels of the working wheel measured along its external cylinder surface corresponds to 1-4 of wheel diametre; number of blades does not exceed 4. Ration of bushing diametre to wheel diametre equals to 0.4-0.9. Meridian section of the wheel converges from inlet to outlet with convergent angle not more, than 15°.
EFFECT: designing gas separator operating in fluid with abrasive particles trouble-free over long period of time.
4 cl, 4 dwg
FIELD: engines and pumps.
SUBSTANCE: invention is related to oil machine building and may be used in submerged electric centrifugal pumps that pump gas-liquid mixtures with high content of solid particles from wells. Device comprises body, shaft, receiving base with channels and mesh for passage of well liquid, separator, channel for gas discharge, channel for discharge of separated liquid, channel for discharge of solid particles connected to container. Inside separator there is axial wheel installed, which is arranged with upper annular disc with internal channel for gas discharge. Ends of wheel blades and internal part of separator are arranged as cone-shaped. Above disc on shaft there is baffle installed, which is arranged in the form of cruciform radial blades, and fixed protective grid, above which compressing wheel is located. Suggested design will make it possible during pump operation to separate gas-liquid mixture with solid particles after supply to device in three flows: gas, liquid and solid particles with their direction along their motion channels due to effect of centrifugal forces.
EFFECT: increased efficiency of pumps operation in crooked wells having viscous, highly carbonated liquid and high content of solid particles.
FIELD: oil and gas production.
SUBSTANCE: method includes gaslift well operation by adjusting the flow rate of working and produced gas. The withdrawal of produced gas is done by tubing string and additional tubing string. The flow rate of working and produced gas is adjusted by opening and closing of driven shut-off elements in accordance to the control signals. Control signals come from automatic control unit and are generated according to the results of measured values compared with set parameter values. Note that the pressure is measured in the mouth and bottom hole, at the same time the flow rate of produced gas is measured. The flow rate of working and produced gas is adjusted in such a way to provide the specified well operation mode.
EFFECT: increase of well operation efficiency, reduction of level and removal of fluid accumulated in bottom-hole zone, provision of well operation stability.
2 cl, 1 dwg
FIELD: oil and gas production.
SUBSTANCE: system for use in the hole includes the string designed for location in the hole that consists of submersible electric pump, the first part of inductive coupler and completion section. Note that completion section is located in the well zone under development and includes the second part of inductive coupler, isolating packer, detection cable and electric device electrically connected to the second part of inductive coupler. Note that detection cable goes through the packer for provision of sensors to some well zones.
EFFECT: increase of system operation efficiency and collection of measurement data referred to the well characteristics.
28 cl, 7 dwg
FIELD: oil and gas industry.
SUBSTANCE: well of hydrocarbon raw material deposit, either gas one or gas-condensate one, includes production string with tubing string with underground operating equipment. Operating equipment includes at least a cutout valve with remote control, which is provided with an actuator, and well head with wellhead equipment. Wellhead equipment comprises casing head, tubing head on which there mounted is X-tree in the form of a fir tree, which includes shutoff members - master and side gate valves with actuators, as well as throttle valve adjacent to the latter, which controls the well flow rate and is provided with an actuator, and monitoring and control members - fuse insert and gas line pressure monitoring valve. Well is connected to control station by means of shutoff members, throttle valve and cutout valve. Control station is made in the form of a cabinet and includes pump accumulator plant and at least one control unit per well.
EFFECT: improving reliability and accident-free operation of gas well and simplifying the control of processes.
12 cl, 5 dwg
FIELD: oil and gas industry.
SUBSTANCE: opening and closing of shutoff-control valves of well cluster is performed by independent supply of working medium to actuators of shutoff-control valves and underground cutout valves in the specified sequence, as well as valves controlling the flow rate of each well. Method is implemented by means of control station mounted in the cabinet and including instrumentation and control, as well as hydraulic system. Hydraulic system includes pneumatic hydraulic pressure accumulators combined with working medium tank, pumps, pressure controls and multiplying gears, and has the possibility of controlling actuators of shutoff-control valves with time delay and in certain sequence. At that, in addition, control lines of loop and flare gate valves are mounted in cabinet of the station, which are installed on pipelines in close proximity to control cabinet, for example on one common frame.
EFFECT: invention simplifies mineral deposit production control process, as well as allows reducing the area occupied with process equipment.
21 cl, 5 dwg
FIELD: oil and gas industry.
SUBSTANCE: single wells or wells forming clusters are drilled; production wells are equipped with wellhead equipment with X-tree including at least one side gate valve and one master gate valve, as well as underground cutout valve and throttle valve and monitoring and control members, which are installed on the loop, for example, fuse strip and gas line pressure monitoring valve. Operation of the well is performed at simultaneous control of production processes of hydrocarbons by means of the station. Control processes involve opening and closing of shutoff-control valves of well cluster by independent supply of working medium to actuators of shutoff-control valves, as well as flare and loop gate valves, which are arranged on pipelines in close proximity to control cabinet, for example on one common frame with control cabinet. Opening of shutoff-control valves of each well is performed in the following way: underground cutout valve, master gate valve, loop gate valve, side gate valve; closing is performed in the reverse order.
EFFECT: improving operating reliability of shutoff-control valves.
3 cl, 5 dwg
FIELD: oil and gas industry.
SUBSTANCE: well cluster includes at least two wells. Each well includes underground operating equipment containing cutout valve and wellhead equipment having casing head, tubing head on which there mounted is X-tree including shutoff members - master and side gate valves. Well cluster is connected to control station of actuators of shutoff members, which is made in the form of a cabinet. Control station includes power lines of function control of shutoff members' actuators. In addition, control lines of loop and flare gate valves are mounted in the cabinet. Loop and flare gate valves are installed on pipelines in close proximity to control cabinet, for example on one common frame.
EFFECT: reducing the surface area occupied with the equipment and increasing cluster operating safety.
12 cl, 5 dwg
FIELD: oil and gas industry.
SUBSTANCE: control method of X-tree consists in opening/closing of shutoff-control valves by supplying the working medium to mechanisms of actuators of underground cutout valve, side and master gate valves by means of control station. Control station includes pneumatic hydraulic system connected through monitoring sensors of station operation parameters to control unit of the station. As control unit there used is software-and-hardware system with local control panel containing a display with sensor control to enter commands in on-line mode and local keyboard.
EFFECT: improved operating reliability of the control station and simpler design of the latter.
18 cl, 3 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to operation of oil production wells. Differential filter comprises swelling polymer applied on matrix particles to swell after contact with water to decrease filter permeability. Polymer is selected from polyacrylic acid or polymethacrylic acid, polymaleic anhydride, acrylamide polymer, polyamide, polyester, latex, and polyvinyl alcohol. Method of adjusting water ingress into well comprises incorporating claimed differential filter into wall bottom for operation therein. Note here that differential filter permeability decreases after contact with water.
EFFECT: controlled water ingress.
18 cl, 2 dwg, 1 ex
FIELD: oil and gas industry.
SUBSTANCE: method includes production from a bed with a water-oil mixture in a forced mode, separation of the product into oil and water, and pumping of the released water into the bed for water intake. According to the invention, an overlying bed is opened in the well for water intake, a device is lowered into the well in the form of a lower pump and an upper pump, the inlet device of which is made as a pipe between a casing pipe and a pipe string, providing for total speed of flow during water and oil offtake that is lower than the speed of oil floating in water to separate the product in the well into oil and water. At the same time the released water is pumped with the lower pump into the bed for water intake. Pumps are selected with efficiency corresponding to watering of the bed produce, and total efficiency providing for forced offtake of the product with water and oil mixture. The device comprises pumps with drives made as capable of their serial arrangement on the pipe string in the well and having inlet and outlet devices, and a packer capable of arrangement between beds in the well, one of which is with a water-oil mixture, and the other one is intended for water intake. The inlet device of the upper pump is made as a cylindrical reservoir with an inlet side hole communicated with a bed holding a water-oil mixture, and the outlet device of this pump is made as a valve unit that lets oil through into a pipe string. The outlet device of the lower pump is made in the form of a channel with an injection valve to inject water into a bed intended for water intake, and the inlet device - in the form of a channel with a suction valve for pumping of settled water into the pump. According to the invention, the reservoir is made in the form of a pipe arranged between a casing pipe and a pipe string with the area of the inner circular section that provides for total speed of flow during water offtake with a lower pump and oil with an upper pump, which is lower than the speed of oil floating in water during intensive offtake in the reservoir. The side hole of the reservoir is arranged below the foot of the bed with water-oil mixture and the inlet of the upper pump by at least 1 m. At the same time above the upper bed designed to intake water, between the casing string and the reservoir, which is made as open at the bottom, there is an additional packet installed, and a channel of the outlet device of the lower pump is communicated with an internal packer space of the well, besides, the side hole of the reservoir is arranged above the inlet device of the lower pump at least by 1 m and below the dynamic level of the water and oil contact.
EFFECT: higher oil recovery of producing formations due to lower watering of the products, limitation of water offtake, higher gradient of pressure in borehole environment of the bed.
FIELD: oil and gas industry.
SUBSTANCE: method involves extraction of product from formation with water-oil mixture in forced mode, separation of product into oil and water and pumping of separated water to water receiving formation. According to the invention, drilling of lower water receiving formation is performed; device in the form of lower pump and upper pump is lowered into the well; inlet system of the above device is made in the form of a pipe between casing pipe and pipe string, which provides total flow velocity at water and oil extraction, which is less than floating-up velocity of oil in water for separation of product in well into water and oil. Separated water is pumped with lower pump to water receiving formation; at that, pumps are chosen with the capacity corresponding to formation product water content and total capacity providing the forced product extraction from the formation with water-oil mixture. Device includes pumps with drives, which have the possibility of being located in series on pipe string in the well and have inlet and outlet devices, and packer having the possibility of being located between formations in the well, the upper one of which has water-oil mixture, and lower one is intended to receive water. Inlet device of upper pump is made in the form of cylindrical capacity with side inlet hole interconnected with formation containing water-oil mixture, and outlet device of this pump is made in the form of valve unit passing the oil to pipe string. Outlet device of lower pump is made in the form of channel with water delivery valve to the formation intended to receive water, and inlet device is made in the form of channel with suction valve for pumping of settled water to the pump. At that, annular section area outside the capacity is chosen so that maximum flow velocity of water-oil mixture downstream of this section exceeds floating-up velocity of oil in water. At that, capacity is made in the form of a pipe located between casing pipe and pipe string with inner annular section area providing the total flow velocity at water extraction with lower pump and oil extraction with upper pump, which is lower than floating-up velocity of oil in water at intense extraction in the capacity. Side hole of the capacity is located at least 1 m below bottom of formation containing water-oil mixture and inlet of upper pump. At that, inlet device of lower pump is interconnected with the capacity at least 1 m below side hole. Capacity is closed from below with a plug with a connection pipe interconnected with outlet device of lower pump and with borehole space.
EFFECT: increasing oil recovery owing to increasing reservoir coverage coefficient at water flooding at advanced stage of development, and reducing material costs.
3 cl, 1 dwg
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.