CN115992677A - Same-well intelligent injection and production device, injection and production system and injection and production method thereof - Google Patents

Abstract

The invention relates to an intelligent injection and production device, an injection and production system and an injection and production method for the same well. The existing partial area oil reservoir reserves are small in scale and scattered in distribution, and a special injection and production system is needed. The invention discloses an intelligent injection and production device for the same well, which comprises an annular sleeve, wherein an upper outer end cover and a lower outer end cover are respectively arranged at the upper end and the lower end of the annular sleeve, a valve cavity is arranged on the lower outer end cover, a lower inner end cover is sleeved at the lower end of the lower outer end cover, a cavity hole and a vertical flow-through pipe are respectively arranged in the upper end cover and the lower end cover and on the annular sleeve to form a flow-through channel, an electric control commutator is simultaneously arranged in the annular sleeve, and the position of a valve core is controlled by the electric control commutator to realize the conduction and sealing between the cavity holes so as to finish injection and production conversion. The injection and production device is matched with a special injection and production pump to directly reinject the production liquid with higher water content to the appointed horizon under the well, so that the pressure of the appointed horizon is enhanced, the exploitation of crude oil at the horizon is realized, and meanwhile, the conversion of the injection and production horizons can be realized.

Description

Same-well intelligent injection and production device, injection and production system and injection and production method thereof

Technical Field

The invention belongs to the technical field of intelligent injection and production of oil fields, and relates to an intelligent injection and production device, an intelligent injection and production system and an intelligent injection and production method for the same well.

Background

In the oil extraction process, with continuous accumulation of experience and continuous updating of technology, a set of relatively complete oil extraction system is formed. The oil layer pressure is higher at the beginning, and the oil well collects crude oil to the ground for treatment by means of the oil layer pressure; along with the reduction of the oil layer pressure, a water injection well is required to be arranged independently for recovering or enhancing the oil layer pressure, so that the oil extraction efficiency is improved.

The oil reservoir reserves of a part of areas are small in scale and scattered in distribution, the construction of a flooding well pattern is not cost-effective, the station building and water injection are uneconomical due to insufficient energy of the oil reservoir and low pressure level, but the oil reservoir of an individual oil reservoir is rich at the same time, and the oil reservoir has development potential, so that a special injection and production system is required for acquisition.

Disclosure of Invention

In order to solve the problems, the invention aims to provide the same-well intelligent injection and production device, the injection and production system and the injection and production method thereof.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

firstly, the invention provides an intelligent injection and production device for the same well, which is characterized in that: the device comprises an annular sleeve, wherein an upper outer end cover and a lower outer end cover are respectively arranged at the upper end and the lower end of the annular sleeve, an upper cavity hole penetrating through the upper end surface and the lower end surface of the upper outer end cover is arranged in the upper outer end cover, a valve cavity is arranged at the upper end of the lower outer end cover, a lower cavity which is relatively penetrated with the valve cavity is arranged at the lower end of the lower outer end cover, a lower inner end cover is sleeved in the lower cavity, a cavity hole A which is radially penetrated with the middle part of the valve cavity is also axially arranged on the lower outer end cover, and a cavity hole B which is radially penetrated with the bottom of the valve cavity is arranged at the radial periphery of the lower outer end cover; the lower cavity bottom of lower part outer end cover is provided with the cavity D that radially link up in valve pocket middle part, be provided with in the lower part inner end cover and link up its upper and lower end's cavity C, cavity C and valve pocket bottom axial relative link up, the annular sleeve in be provided with perpendicular overflow pipe and automatically controlled commutator, perpendicular overflow pipe with go up cavity and cavity A and link up each other from top to bottom and be connected, automatically controlled commutator sets up the valve pocket on, through automatically controlled commutator control in proper order with the cavity ABCD that the valve pocket link up between each other switch on or seal.

Further, the electric control commutator comprises a screw rod transmission mechanism and an adjusting valve core, one end of the adjusting valve core is embedded in the valve cavity, the other end of the adjusting valve core is in driving connection with the screw rod transmission mechanism, and the screw rod transmission mechanism drives the adjusting valve core to move in the valve cavity so as to control the mutual conduction or sealing between the cavity holes ABCD to realize injection-production conversion.

Further, the upper end of the lower outer end cover is provided with a cavity E communicated with the valve cavity, and the upper outer end cover is provided with a cable joint communicated with the upper end and the lower end of the upper outer end cover.

Further, a pressure test set, a temperature test set and a data analysis set are arranged at the upper end of the lower outer end cover, and the pressure test set is communicated with the cavity E; the data analysis group is electrically connected with the electric control commutator, the pressure test group and the temperature test group, the data analysis group is in communication connection with a ground controller for controlling the injection and production position, and the ground controller is connected and controlled through a cable connector to realize the mutual conduction or sealing of the cavity ABCD.

Further, when the cavity AD is conducted, the cavity BC is conducted at the same time; when the cavity AC is conducted, the cavity BD is conducted; and when the cavity AB is conducted, the cavity CD is sealed at the same time.

Secondly, the invention also provides an intelligent injection and production system, which comprises a downhole casing pipe and is characterized in that: the intelligent injection and production device comprises a well intelligent injection and production device, and is characterized in that the intelligent injection and production device is sleeved inside the underground sleeve, an upper packer and a lower packer are connected to the lower end of the intelligent injection and production device respectively, and the intelligent injection and production device in the same well is communicated with an upper liquid layer and a lower liquid layer respectively through the upper packer and the lower packer.

Further, the upper end of the underground sleeve is provided with a wellhead christmas tree and a ground controller, the upper end of the same-well intelligent injection and production device is provided with an injection and production pump, the same-well intelligent injection and production device and the injection and production pump are connected to the wellhead christmas tree and the ground controller through oil pipes and cables respectively, and the same-well intelligent injection and production device is controlled by the ground controller to be respectively communicated with or sealed with the upper-layer packer and the lower-layer packer.

Further, the lower end of the lower packer is sequentially connected with a valve and a screen pipe through an oil pipe.

Further, cavity holes AD of the same-well intelligent injection and production device are communicated, and injection and production are carried out when cavity holes BC are communicated; the cavity holes AC of the same-well intelligent injection and production device are communicated, and the cavity holes BD are communicated to perform injection, production and production; and flushing is performed when the cavity AB of the intelligent injection and production device with the same well is conducted and the cavity CD is sealed.

The third, the invention also provides an injection and production method using the intelligent injection and production system, which is characterized in that: comprising the following steps:

step 1) connecting a lower packer into a downhole casing; making a lower packer;

step 2) the upper layer packer and the same well intelligent injection and production device are connected and then sequentially put into a downhole casing, the upper layer packer and the lower layer packer are in sealing butt joint, and the lower layer packer and the upper layer packer are upwards connected with the same well intelligent injection and production device at the same time;

and 3) installing a ground controller, and controlling and adjusting the same-well intelligent injection and production device to perform injection and production operation through the ground controller.

By adopting the technical scheme, the invention has the following advantages and effects:

(1) According to the intelligent injection and production device for the same well, the mutual communication or sealing between liquids is realized through the through-flow channel formed by the cavity holes ABCD and the through-flow pipeline, the communication or sealing of the cavity holes ABCD is realized by controlling the axial up-down position of the regulating valve core of the electric control commutator in the valve cavity, and the injection and production operations such as injection and production, injection and production and well flushing in the same well are realized through the communication or sealing between the cavity holes ABCD.

(2) According to the same-well intelligent injection and production device and injection and production system, injection and production of an oil layer with specified potential are realized firstly, and the injection and production are carried out in the same well, so that the production efficiency is improved, and the pertinence is enhanced; secondly, the pressurized injection liquid is derived from an oil layer with higher water content, so that the waste of crude oil is avoided, the yield of the crude oil is improved for the whole system, and the production benefit is increased; thirdly, the scale of the injection well pattern is reduced, the establishment of a water injection station is avoided, and the investment cost in the early stage and the subsequent maintenance cost are greatly reduced.

(3) The same-well intelligent injection and production device, the injection and production system and the injection and production method provided by the invention not only realize the injection and production function of the same well, but also realize the injection and production conversion of each oil layer, wherein an injection and production pump is connected with the same-well intelligent injection and production device downwards through an oil pipe during injection and production, and is connected with a wellhead christmas tree upwards through the oil pipe, so that the injection and production function is completed, and an acquisition liquid layer with higher water content is injected into a designated liquid layer after being pressurized; the intelligent injection and production device for the same well is connected with the upper packer and the lower packer downwards through the oil pipe during injection and production conversion, and is connected with the injection and production pump upwards through the oil pipe, so that the injection and production conversion between oil layers is realized, the appointed oil layers can be injected and pressurized, the oil layers can be mined, the requirement interchangeability and convenience during oil well development are ensured, and the sealing of each oil layer can be realized during well flushing.

Drawings

FIG. 1 is a schematic diagram of the same well intelligent injection and production device.

Fig. 2 is a cross-sectional view of M-M of fig. 1.

FIG. 3 is an enlarged schematic view of the regulating valve core of the present invention.

Fig. 4 is an enlarged schematic view of the valve chamber of the present invention.

Fig. 5 is a schematic diagram of the injection and production structure of the intelligent injection and production device in the same well.

Fig. 6 is a schematic diagram of the structure of the injection top of the same well intelligent injection and production device.

FIG. 7 is a schematic diagram of a well flushing structure of the intelligent injection and production device for the same well.

FIG. 8 is a schematic diagram of the working principle of the injection and production system of the present invention.

FIG. 9 is a schematic diagram of the system for intelligent injection and production in the same well.

Wherein: 1-1 wellhead christmas tree, 1-2 underground casing, 1-3 oil pipe, 1-4 injection and production pump, 1-5 same well intelligent injection and production device, 1-6 upper layer packer, 1-7 lower layer packer, 1-8 valve, 1-9 sieve tube, 1-10 ground controller and 1-11 cable;

the device comprises a 2-1 upper outer end cover, a 2-2 electric control commutator, a 2-3 lower outer end cover, a 2-4 lower inner end cover, a 2-5 annular sleeve, a 2-6 pressure test set, a 2-7 temperature test set, a 2-8 data analysis set, a 2-1-1 upper cavity, a 2-1-2 cable connector, a 2-2-1 high temperature motor, a 2-2-2 screw rod transmission mechanism, a 2-2-3 regulating valve core, a 2-3-1 valve cavity, a 2-5-1 vertical overflow pipe, a 2-2-3-1 core door, a 2-2-3-2 runner, a 2-3-1-1 cavity door and a 2-3-1-2 valve port.

Detailed Description

The following detailed description of the embodiments of the present invention will be provided with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the invention, but rather are merely illustrative of the true spirit of the invention.

As shown in fig. 1 and 2. The invention provides an intelligent injection and production device for the same well, which comprises an annular sleeve 2-5, wherein an upper outer end cover 2-1 and a lower outer end cover 2-3 are respectively arranged at the upper end and the lower end of the annular sleeve 2-5, an upper cavity hole 2-1 penetrating through the upper end surface and the lower end surface of the upper outer end cover 2-1 is arranged in the upper outer end cover 2-1, a valve cavity 2-3-1 is axially arranged at the center of the upper end of the lower outer end cover 2-3, and the valve cavity 2-3-1 penetrates through the lower outer end cover. The center of the lower end of the lower outer end cover 2-3 is provided with a lower cavity which is communicated with the valve cavity 2-3-1 relatively, the lower cavity is internally sleeved with a lower inner end cover 2-4, the periphery of the valve cavity 2-3-1 of the lower outer end cover 2-3 is axially provided with a cavity A which is communicated with the middle part of the valve cavity 2-3-1 radially, one side of the radial periphery of the lower outer end cover 2-3 is provided with a cavity B which is communicated with the bottom of the valve cavity 2-3-1 radially, the bottom of the lower cavity of the lower outer end cover 2-3 of the periphery of the lower inner end cover 2-4 is axially provided with a cavity D which is communicated with the middle part of the valve cavity radially, and the lower inner end cover 2-4 is internally provided with a cavity C which is communicated with the upper end and the lower end of the valve cavity. The annular sleeve 2-5 is internally provided with an electric control commutator 2-2, the vertical overflow pipe 2-5-1 and the electric control commutator 2-2 are positioned in the annular sleeve 2-5, the vertical overflow pipe 2-5-1 is communicated with the cavity A and the upper cavity 2-1, the electric control commutator 2-2 is arranged on the valve cavity 2-3-1, and the cavity ABCD communicated with the valve cavity 2-3-1 is controlled to be communicated with or sealed with each other sequentially through the electric control commutator 2-2.

Specifically, the upper outer end cover 2-1 is of a cylindrical cavity structure, and the lower end of the upper outer end cover is provided with external threads for being in threaded sealing connection with the upper end of the annular sleeve 2-5. The center of the upper outer end cover 2-1 is provided with a conical cavity, the conical cavity is a blind cavity, the upper part of the conical cavity is large and small, the upper end of the conical cavity is in threaded connection with an oil pipe, the upper end and the lower end of the side wall of the upper outer end cover 2-1 are respectively provided with a cable joint 2-1-2, and the cable joints are connected through cables penetrating through the upper end and the lower end of the upper outer end cover 2-1. The upper cavity hole 2-1-1 is arranged at one side of the bottom of the conical cavity and axially penetrates through the bottom of the conical cavity and the lower end face of the upper outer end cover 2-1.

The lower outer end cover 2-3 is of a cylindrical cavity structure, and an external thread is arranged at the upper end of the lower outer end cover 2-3 and is used for being in threaded sealing connection with the lower end of the annular sleeve 2-5. The lower cavity arranged at the inner center of the lower end of the lower outer end cover 2-3 penetrates through the upper end and the lower end of the lower outer end cover, the lower cavity is formed by vertically penetrating and communicating a cylindrical cavity and a conical cavity, the cylindrical cavity is communicated with the valve cavity 2-3-1, and an inner thread is arranged on the inner peripheral edge of the end part of the conical cavity at the lower end of the lower outer end cover 2-3 and is used for being connected with an oil pipe in a threaded mode to be communicated with a lower liquid layer.

The lower inner end cover 2-4 is of a step-shaped cavity structure, the cavity hole C is arranged in the upper end of the lower inner end cover 2-4, the cavity hole C is of a cylindrical cavity structure, the lower end of the lower inner end cover 2-4 is provided with a conical cavity communicated with the cavity hole C, the conical cavity is small in upper part and large in lower part, and the lower end of the conical cavity of the lower inner end cover 2-4 is also used for being connected with an oil pipe in a threaded mode. The upper end of the lower inner end cover 2-4 is sleeved in the cylindrical cavity of the lower outer end cover 2-3, and the conical cavity in the lower inner end cover 2-4 is connected with the bottom of the valve cavity 2-3-1 through a cavity hole C. An annular clearance space is formed between the outer periphery of the lower inner end cap 2-4 and the conical cavity of the lower outer end cap 2-3. The inner peripheral edge of the conical cavity at the lower end of the lower inner end cover 2-4 is provided with internal threads for connecting the oil pipe to the upper liquid layer in a threaded manner.

The cavity A is of an L-shaped structure, the cavity A is a single cavity, the valve cavity 2-3-1 is a round cavity, the cavity A is axially arranged on the periphery of the valve cavity 2-3-1, the lower end of the cavity A is radially communicated with the valve cavity 2-3-1, the cavity B is a radially arranged single cavity, one end of the cavity B is communicated with the peripheral surface of the lower outer end cover 2-3, and the other end of the cavity B is radially communicated with the valve cavity 2-3-1. The cavity D is of a C-shaped annular cavity structure, and the C-shaped annular cavity of the cavity D is not communicated with the cavity B. The cavity D is provided at the outer periphery of the cavity B. The cavity hole D is axially and circumferentially arranged between the inner walls of the lower outer end covers 2-3 on the periphery of the lower inner end cover 2-4, the lower end of the cavity hole D is communicated with the annular clearance space through the end part of the lower outer end cover 2-3, the upper end of the cavity hole D is communicated with the radial periphery of the valve cavity 2-3-1, and the lower end of the cavity hole D is radially communicated with the annular clearance space.

The annular sleeve 2-5 is of a vertically through cavity structure, the upper end and the lower end of the annular sleeve 2-5 are provided with internal threads, the upper end and the lower end of the annular sleeve 2-5 are respectively in threaded connection with the upper outer end cover 2-1 and the lower outer end cover 2-3, so that external liquid can be prevented from entering the instrument, and an internal circuit is protected. The electric control commutator 2-2 is arranged in a space on one side of the vertical overflow pipe 2-5-1 in the annular sleeve 2-5, the electric control commutator 2-2 is axially arranged in parallel with the vertical overflow pipe 2-5-1, and the lower end of the electric control commutator 2-2 is inserted into the valve cavity 2-3-1 to control the cavity ABCD to be mutually conducted or sealed through the valve cavity 2-3-1. The lower ends of the lower outer end cover 2-3 and the lower end of the lower inner end cover 2-4 are communicated with the upper layer packer and the lower layer packer underground through oil pipes to realize the communication with the upper layer liquid layer and the lower layer liquid layer.

The vertical overflow pipe 2-5-1 is a circular sleeve, the lower end of the vertical overflow pipe is connected and communicated with the through hole A, and the upper end of the vertical overflow pipe is communicated with the upper cavity hole 2-1-1 on the upper outer end cover. Liquid enters the vertical overflow pipe 2-5-1 through the conical cavity of the upper outer end cover and the upper cavity hole 2-1-1, and enters the cavity hole A through the vertical overflow pipe, and the cavity hole A is communicated with or sealed by other cavity holes BCD to realize overflow between the liquids.

Further, the electric control commutator 2-2 comprises an adjusting valve core 2-2-3, a high temperature motor 2-2-1 and a screw rod transmission mechanism 2-2, one end of the adjusting valve core 2-2-3 is sleeved in the valve cavity 2-3-1, the other end of the adjusting valve core 2-3 is in driving connection with the high temperature motor 2-2-1 through the screw rod transmission mechanism 2-2, and the high temperature motor 2-2-1 drives the screw rod transmission mechanism 2-2-2 to drive the adjusting valve core 2-2-3 to move in the valve cavity 2-3-1 so as to control the cavity ABCD to be mutually conducted or sealed.

Specifically, the end of the high-temperature motor 2-2-1 is provided with a screw rod transmission mechanism 2-2-2, the screw rod transmission mechanism 2-2-2 comprises a transmission screw rod, the front end of the transmission screw rod is provided with a movable sleeve shaft, an inner threaded hole is axially arranged on the movable sleeve shaft and is in threaded connection with one end of the transmission screw rod, the other end of the transmission screw rod is connected with the regulating valve core 2-2-3, the periphery of the movable sleeve shaft is axially provided with a limit groove, the outer part of the movable sleeve shaft is sleeved with a fixed cylinder frame, the inner periphery of the fixed cylinder frame is radially provided with a limit protrusion, the movable sleeve shaft is sleeved in the fixed cylinder frame, the limit protrusion is clamped in the limit groove to convert the rotary motion of the transmission screw rod into the linear motion of the movable sleeve shaft, the rear end of the fixed cylinder frame is provided with the high-temperature motor 2-2-1, the high-temperature motor 2-1 is in driving connection with the transmission screw rod through a motor reducer of the high-temperature motor, and the front end of the fixed cylinder frame is fixed at the upper end of the valve cavity 2-3-1 of the lower outer end cover. The high-temperature motor 2-2-1 drives the transmission screw rod to perform forward and reverse rotation, the transmission screw rod converts the forward and reverse rotation into axial up and down movement of the movable sleeve shaft so as to adjust the valve core 2-2-3 to move in the valve cavity 2-3-1 along the axial direction, and the valve core is respectively communicated with or sealed with the cavity ABCD.

As shown in fig. 3 and 4. The regulating valve core 2-2-3 is of a shaft body structure, a runner 2-2-3-2 with communicated cavity holes ABCD is arranged on the periphery of the regulating valve core 2-2-3 along the axial direction, and the runner 2-2-3-2 comprises a radial runner and an axial runner. An annular outer flange is sequentially arranged up and down along the axial direction of the regulating valve core 2-2-3, and the periphery of the annular outer flange is sealed with the periphery of the valve cavity 2-3-1 to form a core door 2-2-3-1. In the invention, preferably, the adjusting valve core 2-2-3 is axially provided with a plurality of layers of annular flanges to form a plurality of radial flow channels from bottom to top, the axial direction of the adjusting valve core 2-2-3 is simultaneously provided with an axial flow channel, the radial flow channel at the lowest end is used as a first radial flow channel, and at the moment, two ends of the axial flow channel are communicated with the first radial flow channel and a third radial flow channel.

The inner periphery of the valve cavity 2-3-1 is provided with valve ports 2-3-1-2 communicated with cavity holes ABCD in sequence along the axial direction, the valve cavity 2-3-1 is provided with annular inner flanges in sequence along the axial direction up and down, the outer periphery of the annular inner flanges is sealed with the outer periphery of the regulating valve core 2-2-3 to form a cavity door 2-3-1-1, a radial valve port is formed on the inner periphery of the valve cavity 2-3-1 between the upper and lower adjacent cavity doors 2-3-1-1, and the cavity hole at the lowest end of the valve cavity 2-3-1 is used as an axial valve port.

The radial valve port at the lowest axial end is used as a first radial valve port, the first radial valve port is communicated with the cavity B, the second radial valve port is communicated with the cavity D, the third radial valve port is communicated with the cavity A, E, and the axial valve port is communicated with the cavity C.

When the adjusting valve core 2-2-3 moves up and down along the valve cavity 2-3-1, the valve core is communicated or sealed with the cavity ABCD in sequence through the mutual matching of the core door 2-2-3-1, the runner 2-2-3-1 and the cavity door 2-3-1-1 and the valve port 2-3-1-2 of the adjusting valve core 2-2-3.

Further, the upper end of the lower outer end cover 2-3 is also provided with a cavity E opposite to the cavity A, the cavity E is of an L-shaped structure, and the lower end of the cavity E is radially connected with the valve cavity 2-3-1; the upper outer end cover 2-1 is provided with a cable joint 2-1-2 communicated with the upper end and the lower end of the upper outer end cover 2-1, and the cable joint 2-1-2 at the lower part of the upper outer end cover 2-1 stretches into the inner cavity of the annular sleeve 2-5.

Further, a pressure test set 2-6, a temperature test set 2-7 and a data analysis set 2-8 are arranged in the inner cavity of the annular sleeve 2-5 at the upper end of the lower outer end cover 2-3, and the pressure test set 2-6 is communicated with the cavity E; the data analysis group 2-8 is electrically connected with the electric control commutator 2-2, the pressure test group 2-6 and the temperature test group 2-7, the data analysis group 2-8 is in communication connection with the ground controller 1-10 for controlling the injection and production position, and the ground controller 1-10 is connected with the electric control commutator 2-2 through the indirect connection cable connector 2-1-2 to control the mutual conduction or sealing of the cavity ABCD.

Specifically, the cable joint 2-1-2 at the lower part of the upper outer end cover 2-1 stretches into the inner cavity of the annular sleeve 2-5, and the pressure test group 2-6, the temperature test group 2-7 and the data analysis group 2-8 are connected and communicated with external devices through the cable joint 2-1-2 on the upper outer end cover 2-1. The pressure test set 2-6 is arranged at the upper end part of the cavity E and communicated with the cavity E, the pressure test set 2-6 is used for measuring the lower layer pressure, the upper layer pressure and the inner cavity pressure of the annular sleeve 2-5, the cavity E is communicated with the cavity A through the valve core, and the pressure test set 2-6 can respectively detect the pressure data of the cavity through the cavity E. The temperature test group 2-7 is used for measuring the underground environment temperature, and the data analysis group 2-8 is used for carrying out statistical analysis on each real-time collected data.

The pressure test set 2-6 and the temperature test set 2-7 are both standard test components, the data analysis set 2-8 is a standard logic circuit for test analysis, and the temperature test set 2-7 and the data analysis set 2-8 are both in threaded connection with the upper end of the lower outer end cover 2-3. The data analysis group 2-8 is electrically connected with the electric control commutator 2-2, the pressure test group 2-6 and the temperature test group 2-7, the data analysis group 2-8 is simultaneously connected with a ground controller for controlling the injection and production position in a communication way, and the ground controller is used for controlling the electric control commutator 2-2.

Further, when the cavity AD is conducted, the cavity BC is conducted at the same time; when the cavity AC is conducted, the cavity BD is conducted; the cavity AB is communicated and the cavity C, D is sealed at the same time.

Specifically, as shown in fig. 5, 6, and 7. When the intelligent injection and production device is used in the same well, the lower inner end cover 2-4 at the lower end is communicated with the upper layer packer through an oil pipe, and the lower outer end cover 2-3 is communicated with the lower layer packer through an oil pipe, so that when the regulating valve core 2-2-3 is positioned at the upper end position of the valve cavity 2-3-1, the cavity AD is communicated and the cavity BC is communicated, and injection and drainage are realized at the moment; when the adjusting valve core 2-2-3 is positioned at the lower end position of the valve cavity 2-3-1, the cavity hole AC is conducted and the cavity hole BD is conducted; at this time, the production and the injection are realized; when the adjusting valve core 2-2-3 is positioned at the middle position of the valve cavity 2-3-1, the cavity holes C, D are sealed at the same time when the cavity holes AB are communicated, and well flushing is realized at the moment.

As shown in fig. 8 and 9. The invention provides an intelligent injection and production system using the same-well intelligent injection and production device, which comprises the same-well intelligent injection and production device 1-5 and a downhole sleeve 1-2, wherein the upper end of the downhole sleeve 1-2 is provided with a wellhead production tree 1-1 and a ground controller 1-10, an injection and production pump 1-4, an upper layer packer 1-6 and a lower layer packer 1-7 are sequentially arranged in the downhole sleeve 1-2 from top to bottom, the same-well intelligent injection and production device 1-5 is arranged between the injection and production pump 1-4 and the upper layer packer 1-6, the lower end of an inner end cover 2-4 of the lower part of the well intelligent injection and production device 1-5 is connected with the upper layer packer 1-6 through an oil pipe 1-3, the lower end of an outer end cover 2-3 of the lower part of the well intelligent injection and production device is connected with the lower layer packer 1-7 through the oil pipe 1-3, the upper end of the same-well intelligent injection and production device 1-4 is sequentially connected with the wellhead controller 1-6 through the oil pipe 1-3 and the cable 1-11, and the same-well intelligent injection and production device 1-4 is connected with the ground controller 1-10 through the same-1 control layer 1-6.

Further, the lower end of the lower packer 1-7 is also connected with a valve 1-8 and a screen pipe 1-9 in sequence through an oil pipe 1-3.

Further, when the cavity AD of the same-well intelligent injection and production device 1-5 is conducted and the cavity BC is conducted, the same-well intelligent injection and production device 1-5 is respectively communicated with the upper layer packer 1-6 and the lower layer packer 1-7 to realize injection and production; the cavity holes AC of the same-well intelligent injection and production device 1-5 are communicated and the cavity holes BD are communicated, and the same-well intelligent injection and production device 1-5 is communicated with the upper layer packer 1-6 and the lower layer packer 1-7 respectively for injection and production; the cavity AB of the same-well intelligent injection and production device 1-5 is communicated with the cavity CD at the same time, the same-well intelligent injection and production device 1-5 is communicated with the upper packer 1-6 and is sealed with the lower packer 1-7, and well flushing is carried out.

Specifically, the lower inner end cover 2-4 at the lower end of the same-well intelligent injection and production device 1-5 is communicated with the upper layer packer 1-6 through the oil pipe 1-3, and the lower outer end cover 2-3 is communicated with the lower layer packer 1-7 through the oil pipe 1-3, so that when the regulating valve core 2-2-3 is positioned at the upper end position of the valve cavity 2-3-1, the cavity AD is communicated and the cavity BC is communicated, and injection and drainage are realized at the moment; when the adjusting valve core 2-2-3 is positioned at the lower end position of the valve cavity 2-3-1, the cavity hole AC is conducted and the cavity hole BD is conducted; at this time, the production and the injection are realized; when the adjusting valve core 2-2-3 is positioned at the middle position of the valve cavity 2-3-1, the cavity holes C, D are sealed at the same time when the cavity holes AB are communicated, and well flushing is realized at the moment.

The invention provides an injection and production method using the intelligent injection and production system, which comprises the following steps:

the first step: connecting the sieve tube 1-9, the valve 1-8 and the lower layer packer 1-7, using the continuous oil tube 1-3 to be put into the appointed position of the underground sleeve 1-2 from the injection well mouth, and extracting the continuous oil tube 1-3 after the lower layer packer 1-7 is sealed; the sieve tube 1-9 can filter large particle impurities to prevent the phenomenon of damage or blockage of an upper underground instrument, and the valve 1-8 is arranged at the upper end of the sieve tube 1-9 to prevent the occurrence of the phenomena of well fluid back pressure backflow, blowout and the like.

And a second step of: the upper layer packer 1-6, the same-well intelligent injection and production device 1-5 and the injection and production pump 1-4 are connected through the oil pipe 1-3, and are sequentially put into the underground sleeve 1-2 until sealing butt joint with the lower layer packer 1-7 is completed, the lower layer packer 1-7 and the upper layer packer 1-6 are downwards connected with the valve 1-8 through the oil pipe 1-3 and upwards connected with the same-well intelligent injection and production device 1-5 through the oil pipe 1-3, separation and sealing of oil layers are realized through pressure, independence between the oil layers is guaranteed, sealing of a wellhead is realized through the wellhead production tree 1-1, and blowout is prevented.

And a third step of: performing wellhead construction and ground controller 1-10 installation construction; the ground controller 1-10 is sequentially connected with the wellhead Christmas tree 1-1, the oil production pump 1-3, the same-well intelligent injection and production device 1-5, the upper packer 1-6 and the lower packer 1-7 through armored cables, so that the functions of signal transmission, signal processing, instruction control and the like of the whole acquisition system are realized, and the same-well intelligent injection and production device 1-5 is controlled and regulated to a working state through the ground controller 1-10 according to an oil production layer and an water injection layer which are determined through actual detection.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a same well intelligence annotates and adopts device which characterized in that: the device comprises an annular sleeve (2-5), wherein an upper outer end cover (2-1) and a lower outer end cover (2-3) are respectively arranged at the upper end and the lower end of the annular sleeve (2-5), an upper cavity hole (2-1-1) penetrating through the upper end surface and the lower end surface of the upper outer end cover (2-1) is arranged in the upper outer end cover (2-1), a valve cavity (2-3-1) is arranged at the upper end of the lower outer end cover (2-3), a lower cavity which is relatively penetrated with the valve cavity (2-3-1) is arranged at the lower end of the lower outer end cover (2-3), a lower inner end cover (2-4) is sleeved in the lower cavity, a cavity hole A which is radially penetrated with the middle part of the valve cavity (2-3-1) is also axially arranged on the lower outer end cover (2-3), and a cavity hole B which is radially penetrated with the bottom of the valve cavity (2-3-1) is radially arranged at the outer periphery of the lower outer end cover (2-3). The automatic valve is characterized in that a cavity D which is radially communicated with the middle of the valve cavity (2-3-1) is axially arranged at the bottom of the lower cavity of the lower outer end cover (2-3), a cavity C which is communicated with the upper end and the lower end of the valve cavity is arranged in the lower inner end cover (2-4), the cavity C is axially and relatively communicated with the bottom of the valve cavity (2-3-1), a vertical overflow pipe (2-5-1) and an electric control commutator (2-2) are arranged in the annular sleeve (2-5), the vertical overflow pipe (2-5-1) is vertically and mutually communicated with the upper cavity (2-1-1) and the cavity A, and the electric control commutator (2-2) is arranged on the valve cavity (2-3-1) and sequentially controls the cavity ABCD communicated with the valve cavity (2-3-1) or sealed.

2. The same-well intelligent injection and production device according to claim 1 or 2, wherein: the electric control commutator (2-2) comprises a screw rod transmission mechanism (2-2-2) and an adjusting valve core (2-2-3), one end of the adjusting valve core (2-2-3) is embedded in the valve cavity (2-3-1), the other end of the adjusting valve core (2-2-3) is in driving connection with the screw rod transmission mechanism (2-2), and the screw rod transmission mechanism (2-2) drives the adjusting valve core (2-2-3) to move in the valve cavity (2-3-1) so as to control the cavity ABCD to be mutually conducted or sealed.

3. The intelligent injection and production device for the same well according to claim 2, wherein: the upper end of the lower outer end cover (2-3) is provided with a cavity E communicated with the valve cavity (2-3-1), and the upper outer end cover (2-1) is provided with a cable joint (2-1-2) communicated with the upper end and the lower end of the upper outer end cover (2-1).

4. The intelligent injection and production device for the same well according to claim 3, wherein: the upper end of the lower outer end cover (2-3) is provided with a pressure test group (2-6), a temperature test group (2-7) and a data analysis group (2-8), and the pressure test group (2-6) is communicated with the cavity E; the data analysis group (2-8) is electrically connected with the electric control commutator (2-2), the pressure test group (2-6) and the temperature test group (2-7), the data analysis group (2-8) is in communication connection with the ground controller (1-10) for controlling the injection and production position, and the ground controller (1-10) is connected with the electric control commutator (2-2) through the cable connector (2-1-2) to control the mutual conduction or sealing of the cavity ABCD.

5. The intelligent injection and production device for the same well according to claim 4, wherein: when the cavity AD is conducted, the cavity BC is conducted at the same time; when the cavity AC is conducted, the cavity BD is conducted; and when the cavity AB is conducted, the cavity CD is sealed at the same time.

6. An intelligent injection and production system comprises a downhole casing (1-2), and is characterized in that; the intelligent injection and production device for the well also comprises an intelligent injection and production device (1-5) for the same well, wherein the intelligent injection and production device (1-5) for the same well is sleeved inside the underground sleeve (1-2), the lower end of the intelligent injection and production device (1-5) for the well is respectively connected with an upper layer packer (1-6) and a lower layer packer (1-7), and the intelligent injection and production device (1-5) for the same well is respectively communicated with the upper layer liquid layer and the lower layer liquid layer through the upper layer packer (1-6) and the lower layer packer (1-7).

7. The intelligent injection and production system according to claim 6, wherein: the well head production tree is characterized in that a well head production tree (1-1) and a ground controller (1-10) are arranged at the upper end of a downhole casing (1-2), an injection pump (1-4) is arranged at the upper end of a same-well intelligent injection and production device (1-5), the same-well intelligent injection and production device (1-5) and the injection pump (1-4) are connected to the well head production tree (1-1) and the ground controller (1-10) through an oil pipe (1-3) and a cable (1-11) respectively, and the same-well intelligent injection and production device (1-5) is controlled to be communicated with or sealed with an upper packer (1-6) and a lower packer (1-7) respectively through the ground controller (1-10).

8. The intelligent injection and production system of claim 7, wherein: the lower end of the lower packer (1-7) is sequentially connected with a valve (1-8) and a screen pipe (1-9) through an oil pipe (1-3).

9. The intelligent injection and production system of claim 8, wherein: the cavity AD of the same-well intelligent injection and production device (1-5) is communicated, and injection and production are carried out when the cavity BC is communicated; the cavity holes AC of the same-well intelligent injection and production devices (1-5) are communicated, and simultaneously the cavity holes BD are communicated to perform injection, upper production and lower production; and the flushing is carried out when the cavity AB of the same-well intelligent injection and production device (1-5) is conducted and the cavity CD is sealed.

10. An injection and production method using the intelligent injection and production system of any one of claims 6-9, characterized by: comprising the following steps:

step 1), connecting and lowering a lower packer (1-7) into a downhole casing (1-2); making a lower packer (1-7);

step 2) the upper layer packer (1-6) and the same-well intelligent injection and production device (1-5) are connected and then sequentially put into the underground sleeve (1-2), the upper layer packer (1-6) is in sealing butt joint with the lower layer packer (1-7), and the lower layer packer (1-7) and the upper layer packer (1-6) are upwards connected with the same-well intelligent injection and production device (1-5) at the same time;

and 3) installing a ground controller 1-10, and controlling and adjusting the same-well intelligent injection and production device (1-5) through the ground controller 1-10 to perform injection and production operation.

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