Intelligent separate production process string and implementation method

Abstract

This invention belongs to the field of oil and gas field development technology, and discloses an intelligent production process string and implementation method suitable for small wellbores. The intelligent production process string includes: a sand control string, including a sand control screen located in the open hole section, a sand control top packer located at the front end of the sand control screen, and at least one open hole segment sand control packer for segmenting the open hole section to form multiple sub-open hole sections; a production string, including at least a production distributor located in each sub-open hole section, an electrically controlled setting packer that sets and cooperates with the open hole segment sand control packer and is connected to the adjacent production distributor, a lower intelligent node connected to the foremost production distributor, and a drop tool connected to the lower intelligent node; and a production string, including at least an upper intelligent node and an electric submersible pump connected sequentially from bottom to top. The upper intelligent node is connected to the surface control device via a first steel pipe cable, the production distributor is connected to the lower intelligent node via a second steel pipe cable, and the upper intelligent node is magnetically coupled to the lower intelligent node through the drop tool.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field development technology, specifically to an intelligent production process tubing and its implementation method. Background Technology

[0002] my country's offshore oilfields have entered the stage of refined injection and production development. At present, the main offshore stratified production tubing strings are drop-out stratified production tubing strings and Y-type stratified production tubing strings, and mechanical sand control is generally adopted. The production tubing strings adopt an insertion sealing method to achieve stratification with the inner sealing cylinder of the sand control tubing string. The lifting system adopts electric submersible pumps.

[0003] Because conventional mechanical sliding sleeves have shortcomings as stratification production tools, such as low efficiency in switching and adjusting layers and unsuitability for wells with large deviation, the stratification production tools used in existing stratified oil production tubing are usually intelligent stratification production tools that can be controlled from the ground. Disposable production lines typically use cableless intelligent production controllers, but these controllers have drawbacks such as limited battery power, restricted adjustment frequency, and the need to generate pressure waves by pumping water from the casing. This results in low communication success rates for pressure wave transmission from the casing and the risk of reservoir contamination. Y-type production lines usually use cable-controlled or hydraulic intelligent production controllers. These controllers require cables or hydraulic lines as control signal transmission channels, typically laid externally on the tubing. While they are highly adaptable to 9-5 / 8in casing, their use in smaller casings presents challenges due to space constraints at the Y-joint location, posing a risk of compressing communication cables or hydraulic lines, increasing the risk of accidents during installation, and limiting the selection of ESPs, especially in 7in casings, where ESP selection is significantly restricted and may not meet production needs.

[0004] As development progresses into the later stages, the number of sidetracking adjustment wells is increasing. "7-inch casing + 6-inch open hole" is the main completion method for sidetracking adjustment wells. Therefore, there is an urgent need for an intelligent production string suitable for small wellbores to make up for the above-mentioned shortcomings of existing technologies. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes an intelligent wellbore extraction process string and implementation method suitable for small wellbores.

[0006] The intelligent sub-mining process string according to the present invention includes: a sand control string, comprising a sand control screen pipe located within an open-hole section, a sand control top packer located at the front end of the sand control screen pipe, and at least one open-hole segment sand control packer for segmenting the open-hole section to form multiple sub-open-hole sections; a production string, comprising at least a production distributor located within each sub-open-hole section, an electrically controlled setting packer that sets and cooperates with the open-hole segment sand control packer and is connected to the adjacent production distributor, a lower intelligent node connected to the foremost production distributor, and a drop tool connected to the front end of the lower intelligent node; and a production string, comprising at least an upper intelligent node and an electric submersible pump connected sequentially from bottom to top. The upper intelligent node is connected to a ground control device via a first steel pipe cable, the production distributor is connected to the lower intelligent node via a second steel pipe cable, and the upper intelligent node is magnetically coupled to the lower intelligent node through the drop tool.

[0007] Furthermore, the upper smart node includes a plug, in which a first energy coil and a first signal coil are sequentially arranged along its axial direction. The lower smart node includes a lower connector with an inner cavity, in which a second energy coil and a second signal coil are sequentially arranged along the axial direction of the lower connector. The plug is inserted into the inner cavity so that the first energy coil and the second energy coil are opposite each other to realize the transfer of electrical energy, and at the same time the first signal coil and the second signal coil are opposite each other to realize bidirectional signal communication.

[0008] Furthermore, the intelligent sampling process string also includes a positioning detection module. This module includes a Hall element housed within the plug and a magnetic material housed within the lower connector. The Hall element is located between the first energy coil and the first signal coil, while the magnetic material is located between the second energy coil and the second signal coil. The Hall element comprises a first Hall element and a second Hall element spaced apart from top to bottom along the axis of the plug. The magnetic material comprises a first magnetic ring and a second magnetic ring spaced apart from top to bottom along the axis of the lower connector. The first magnetic ring forms a first magnetic field region, and the second magnetic ring forms a second magnetic field region. During the insertion of the plug into the lower connector, when at least part of the second Hall element enters the second magnetic field region and at least part of the first Hall element enters the first magnetic field region, a positioning electrical signal is generated. This positioning electrical signal is transmitted back to the ground control device via a first steel pipe cable connected to the upper intelligent node.

[0009] Furthermore, the production string also includes a telescoping compensator connecting the upper smart node and the electric submersible pump. The first steel pipe cable includes a first connecting section connecting the ground control device and the telescoping compensator and a second connecting section connecting the telescoping compensator and the upper smart node. The telescoping compensator includes a telescoping rod connected to the electric submersible pump and a housing connected to the upper smart node. The housing has an opening and a sliding inner cavity communicating with the opening. The telescoping rod includes a slider that slides into the sliding inner cavity and a rod body connected to the slider. The outer diameter of the slider is larger than the outer diameter of the opening. A spiral steel armor is provided between the slider and the opening. The spiral steel armor is sleeved on the rod body. The rod body is connected to the electric submersible pump. The first connecting section is connected to the rod body, and the second connecting section is connected to the housing.

[0010] Furthermore, the electrically controlled setting packer includes a main control circuit board, a micro motor connected to the main control circuit board, a lead screw connected to the micro motor, a rubber cylinder pressure ring connected to the lead screw, a setting rubber cylinder connected to the rubber cylinder pressure ring, and a first cable connector connected to the main control circuit board. The first cable connector is connected to a second steel pipe cable. When setting is required, the ground control device sends a setting command to the main control circuit board. After receiving the setting command, the main control circuit board controls the micro motor to rotate, thereby driving the lead screw to rotate, which in turn drives the rubber cylinder pressure ring to squeeze the setting rubber cylinder, thus achieving setting.

[0011] Furthermore, the distribution unit includes a control circuit board, a pressure detection module, a regulating valve actuator, and a second cable connector. After the ground control device issues a control command, it is analyzed by the control circuit board to control the regulating valve actuator to adjust the opening. The pressure detection module is used to detect the pressure inside and outside the pipe and upload it to the ground control device. The ground control device provides the flow rate of each sub-section based on the built-in relationship chart between the pressure difference inside and outside the pipe and the flow rate.

[0012] Furthermore, the production string also includes a positioning seal located at the front end of the sand-proof top packer, and a casing top packer located between the positioning seal and the lower smart node for suspending and straightening the production string. The casing top packer is provided with a pressure transmission hole and a through hole for the second steel pipe cable to pass through.

[0013] Furthermore, the drop tool includes a well-keeping short section connected to the lower smart node and a drop tool short section connected to the well-keeping short section. The drop tool short section is connected to the upper smart node. Both the drop tool short section and the well-keeping short section have through holes for passing through the upper smart node. The end of the through hole on the well-keeping short section facing the upper smart node is formed into a trumpet shape.

[0014] According to the intelligent production process implementation method of the present invention, the application of the above-mentioned intelligent production process tubing includes the following steps: Step 1, running the sand control tubing; Step 2, running the production distribution tubing through the upper tubing, and after the positioning seal is in place, closing the production distribution device; Step 3, pressurizing to set the packer at the top of the casing, continuing to pressurize to disengage the release sub and the well-keeping sub, and pulling out the upper tubing; Step 4, running the production tubing to connect the upper intelligent node and the lower intelligent node; Step 5, the surface control device receives the connection signal and sends a setting command to set the electrically controlled setting packer; Step 6, the surface control device adjusts the opening degree of the production distribution device located in each sub-open hole section according to the reservoir requirements.

[0015] Furthermore, in step two, before the upper tubing carrying the production string is lowered, the release tool and the lower intelligent node are prefabricated into a tool assembly, and the upper tubing is connected to the release tool. After the positioning seal is lowered into place, a cable is used to carry the test intelligent node into the interior of the upper tubing and insert it into the lower intelligent node, so that the test intelligent node and the lower intelligent node are magnetically coupled. Then, an operation command is issued through the ground control device to shut down the production generator. Alternatively, in step two, before the upper tubing carrying the production string is lowered, the upper intelligent node, the release tool, and the lower intelligent node are prefabricated into a tool assembly, and the upper tubing is connected to the upper intelligent node. After the positioning seal is lowered into place, an operation command is issued through the ground control device to shut down the production generator.

[0016] Compared with existing technologies, the intelligent sampling process tubing and implementation method of the present invention have the following advantages:

[0017] 1) It enables the maintenance of electric submersible pumps without moving the production tubing, thereby effectively improving pump inspection efficiency and reducing operating costs.

[0018] 2) The hand-free, non-contact, electrically controlled intelligent production process string avoids the space constraints of Y-type tubing in small-sized wells, which limits the selection of electric submersible pumps and can meet the needs of large-volume fluid extraction production. It also enables intelligent measurement and control functions such as long-term power supply and online control monitoring.

[0019] 3) The upper production tubing and the lower distribution tubing are flexibly compensated and connected, avoiding the impact on the electric submersible pump when the production tubing and distribution tubing are connected.

[0020] 4) The use of electrically controlled setting packers not only makes them easier to run in horizontal well sections, thus solving the difficulty of running conventional insertion seals in horizontal well sections, but also has a higher rubber sleeve expansion ratio and sealing pressure difference. The rubber sleeve expansion ratio can reach 1.7 to 2, and the sealing pressure difference can reach 15 MPa, thus making up for the shortcomings of conventional small-size compression packers that have poor setting effect due to low sealing pressure difference.

[0021] 5) This process string is also suitable for 9-5 / 8in casing or larger diameter wells, and still has the advantages of improving pump inspection efficiency and online monitoring and control. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the intelligent sampling process tubing according to an embodiment of the present invention;

[0023] Figure 2 for Figure 1 The diagram shown illustrates the connection between the upper and lower intelligent nodes.

[0024] Figure 3 for Figure 2 The diagram shown illustrates the structure and working principle of the position detection module, showing the six different positions of the Hall element.

[0025] Figure 4 The corresponding signal issued by the arrival detection module Figure 3 A schematic diagram of electrical signals at six different locations is shown;

[0026] Figure 5 for Figure 1 The diagram shown is a structural schematic of the expansion joint in its extended state.

[0027] Figure 6 for Figure 1 The diagram shows the structure of the expansion joint in the retracted state.

[0028] Figure 7 for Figure 1 The diagram shows the internal structure of the production equipment.

[0029] Figure 8 for Figure 1 The diagram shown is a structural schematic of the electrically controlled setting packer.

[0030] Figure 9 This is a schematic diagram of the intelligent sampling process implementation method according to the first embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the intelligent sampling process implementation method according to the second embodiment of the present invention. Detailed Implementation

[0032] To better understand the purpose, structure, and function of this invention, the invention will be described in further detail below with reference to the accompanying drawings.

[0033] Figure 1 The structure of the intelligent sampling process string 100 according to an embodiment of the present invention is shown. Figure 1As shown, the intelligent sub-production process string 100 may include: a sand control string, which may include a sand control screen 18 located within the open hole section 25, a sand control top packer 16 located at the front end of the sand control screen 18, and at least one open hole segment sand control packer 20 for segmenting the open hole section 25 to form multiple sub-open hole sections; a production string, which may include at least a production distributor 17 located within each sub-open hole section, an electrically controlled setting packer 19 that sets and cooperates with the open hole segment sand control packer 20 and is connected to the adjacent production distributor 17 through a first tubing 24, a lower intelligent node 11 connected to the foremost production distributor 17 through a second tubing 14, and a drop tool 10 connected to the front end of the lower intelligent node 11; and a production string, which may include at least an upper intelligent node 9 and an electric submersible pump 7 connected sequentially from bottom to top through a third tubing 5. Among them, the upper intelligent node 9 is connected to the ground control device 1 through the first steel pipe cable 21, the production device 17 is connected to the lower intelligent node 11 through the second steel pipe cable 22, and the upper intelligent node 9 is magnetically coupled to the lower intelligent node 11 through the drop tool 10.

[0034] In the intelligent production process string 100 of this embodiment, the upper intelligent node 9 and the lower intelligent node 11 are connected by magnetic coupling. On the one hand, this enables the transmission of electrical energy and communication signals, thereby realizing the transmission of electrical energy and signals between the ground control device 1 and the production distributor 17. On the other hand, when it is necessary to maintain the electric submersible pump 7, it is only necessary to lift the production string to separate the upper intelligent node 9 and the lower intelligent node 11, so that the maintenance of the electric submersible pump 7 can be carried out without moving the production distribution string. This effectively improves the pump maintenance efficiency and reduces the operating cost. In addition, the detachable connection between the upper intelligent node 9 and the lower intelligent node 11 allows for a larger space in the string where the electric submersible pump 7 is located. In small-sized wellbores, this effectively avoids the limitation of Y-shaped string space on the selection of the electric submersible pump 7, thereby meeting the needs of high-volume fluid extraction production. Furthermore, the open-hole segmented sand control packer 20 in the sand control tubing works in conjunction with the electrically controlled setting packer 19 in the production tubing. The setting command is sent to the electrically controlled setting packer 19 through the surface control device 1, and the electrically controlled setting packer 19 can be set in the open-hole segmented sand control packer 20. The setting cooperation of the two realizes segmented isolation and production of the horizontal open-hole section, and the electrically controlled setting packer 19 is easier to run in the horizontal section, thus solving the difficulty of running conventional insert seals in the horizontal section. On the other hand, the electrically controlled setting packer 19 has a higher rubber expansion ratio and a larger sealing pressure difference in the open-hole segmented sand control packer 20, thus making up for the shortcomings of conventional small-size compression packers that have poor setting effect due to low sealing pressure difference.

[0035] In a preferred embodiment, the above-described open-hole segmented sand packer 20 can be used during new well development, while chemical packers can be used instead in older wells that are already in production.

[0036] According to the present invention, in such Figure 2 In the preferred embodiment shown, the upper intelligent node 9 may include a plug 91, within which a first energy coil 92 and a first signal coil 93 are sequentially arranged along its axial direction. The lower intelligent node 11 may include a lower connector forming an inner cavity 111, within which a second energy coil 112 and a second signal coil 113 are sequentially arranged along the axial direction. The plug 91 is inserted into the inner cavity 111 such that the first energy coil 92 and the second energy coil 112 are aligned to achieve power transfer, while the first signal coil 93 and the second signal coil 113 are aligned to achieve bidirectional signal communication. In this embodiment, by providing energy coils and signal coils inside both the upper intelligent node 9 and the lower intelligent node 11, the upper intelligent node 9 and the lower intelligent node 11 achieve power and communication signal transmission through magnetic coupling resonance, thereby realizing power and signal transmission between the ground control device 1 and the distributor 17.

[0037] Furthermore, such as Figure 2 As shown, the intelligent sampling process tubing may also include a positioning detection module. This module may include a Hall element 94 disposed within the connector 91 and a magnetic material 114 disposed within the lower connector. The Hall element 94 is located between the first energy coil 92 and the first signal coil 93, and the magnetic material 114 is located between the second energy coil 112 and the second signal coil 113. Figure 3 As shown, the Hall element 94 may include a first Hall element 941 and a second Hall element 942 spaced apart from top to bottom along the axial direction of the plug 91. The magnetic material 114 may include a first magnetic ring 1141 and a second magnetic ring 1142 spaced apart from top to bottom along the axial direction of the lower connector. The first magnetic ring 1141 forms a first magnetic field region 101, and the second magnetic ring 1142 forms a second magnetic field region 102. During the insertion of the plug 91 into the lower connector, when the second Hall element 942 at least partially enters the second magnetic field region 102 and the first Hall element 941 at least partially enters the first magnetic field region 101, a docking signal is generated. The docking signal is transmitted back to the ground control device 1 through the first steel pipe cable 21 connected to the upper smart node 9. In this embodiment, the first Hall element 941 and the second Hall element 942, as well as the first magnetic ring 1141 and the second magnetic ring 1142, can realize the interval detection of docking, effectively control the insertion speed of the tubing, and avoid damage to the electric submersible pump 7, the upper smart node 9, and the lower smart node 11 caused by the impact force during docking.

[0038] Combination Figure 3 and Figure 4 As shown, Figure 3 The six different positions of the Hall element are shown. Figure 4 The corresponding signal emitted by the position detection module is shown. Figure 3 The diagram shows electrical signals at six different positions, where the solid line represents the signal emitted by the first Hall element 941 and the dashed line represents the signal emitted by the second Hall element 942. The operation of the positioning detection module is as follows: As the production column is gradually lowered, the upper intelligent node 9 is gradually inserted into the lower intelligent node 11. When the upper intelligent node 9 is at position ①, neither the first Hall element 941 nor the second Hall element 942 detects a magnetic field, and the electrical signals transmitted back to the ground control device 1 are both 0. As the column continues to be lowered, when the upper intelligent node 9 is at position ②, the second Hall element 942 detects that the magnetic field strength of the first magnetic ring 1141 is greater than a certain set threshold, and the electrical signal value is 1, transmitted back to the ground control device 1. When the upper intelligent node 9 moves from position ② to position ③, the electrical signal transmitted back by the second Hall element 942 remains 1, and the first Hall element 941 remains 0. When the upper intelligent node 9 moves from position ③... When the upper intelligent node 9 is at position ④, the second Hall element 942 transmits a signal of 0, while the first Hall element 941 remains at 0. When the upper intelligent node 9 is at position ④, the first Hall element 941 detects that the magnetic field strength of the first magnetic ring 1141 is greater than a certain set threshold, and the signal value is 1, which is transmitted back to the ground control device 1. When the upper intelligent node 9 moves from position ④ to position ⑤, the second Hall element 942 transmits a signal of 0, while the first Hall element 941 remains at 1. When the upper intelligent node 9 moves from position ⑤ to position ⑥, both the first Hall element 941 and the second Hall element 942 transmit signals of 1. At this time, the second Hall element 942 at least partially enters the second magnetic field region 102, and the first Hall element 941 at least partially enters the first magnetic field region 101. This range is the docking interval, which enables effective power supply and communication between the upper intelligent node 9 and the lower intelligent node 11. Preferably, the docking interval distance can be 500mm.

[0039] According to the present invention, in such Figure 1 In the preferred embodiment shown, the production tubing may further include an expansion joint 8 connecting the upper smart node 9 and the electric submersible pump 7. The first steel pipe cable 21 includes a first connecting section connecting the ground control device 1 and the expansion joint 8, and a second connecting section connecting the expansion joint 8 and the upper smart node 9. Wherein, combined with Figure 5As shown, the telescopic compensator 8 may include a telescopic rod 84 connected to the electric submersible pump 7 and a housing 81 connected to the upper smart node 9. The housing 81 has an opening 83 and a sliding inner cavity 82 communicating with the opening 83. The telescopic rod 84 may include a slider 85 that slides in cooperation with the sliding inner cavity 82 and a rod body connected to the slider 85. The outer diameter of the slider 85 is larger than the outer diameter of the opening 83. A spiral steel armor 86 is provided between the slider 85 and the opening 83. The spiral steel armor 86 is sleeved on the rod body. The rod body is connected to the electric submersible pump 7. The first connecting section is connected to the rod body through a second cable connector 88, and the second connecting section is connected to the housing 81 through a third cable connector 87.

[0040] This embodiment installs a telescopic compensator 8 between the electric submersible pump 7 and the upper intelligent node 9. The telescopic compensator 8 can compensate for the first steel pipe cable 21, preventing the first steel pipe cable 21 from breaking due to the creep of the oil pipe during production, thereby improving the stability of the production system and extending the service life of downhole tools. It can also compensate for the oil pipe of the production string, facilitating flexible docking when the upper intelligent node 9 and the lower intelligent node 11 are connected, thus avoiding impact on the electric submersible pump 7.

[0041] like Figure 5 As shown, the expansion joint 8 is in the extended state. The spiral steel armor 86 inside the expansion joint 8 can meet the axial tension of the first steel pipe cable 21 during tubing creep, thereby improving the cable's service life downhole. Figure 6 As shown, the telescopic compensator 8 is in the retracted state. The telescopic compensator 8 can preferably be set to meet the distance adjustment of 500mm to 1000mm, or multiple sets of tools can be connected in series to achieve a larger distance adjustment.

[0042] According to the present invention, in such Figure 8 In the preferred embodiment shown, the electrically controlled setting packer 19 may include a main control circuit board 191, a micro motor 192 connected to the main control circuit board 191, a lead screw 193 connected to the micro motor 192, a rubber sleeve pressure ring 194 connected to the lead screw 193, a setting rubber sleeve 195 connected to the rubber sleeve pressure ring 194, and a first cable connector 196 connected to the main control circuit board 191, the first cable connector 196 being connected to a second steel pipe cable 22. When setting is required, the ground control device 1 sends a setting command to the main control circuit board 191. After receiving the setting command, the main control circuit board 191 controls the micro motor 192 to rotate, thereby rotating the lead screw 193, which in turn causes the rubber sleeve pressure ring 194 to compress the setting rubber sleeve 195, achieving setting.

[0043] Specifically, the setting command sent by the ground control device 1 is transmitted to the upper intelligent node 9 through the first steel pipe cable 21. The upper intelligent node 9 transmits the command to the second signal coil 113 of the lower intelligent node 11 through the first signal coil 93, and then to the main control circuit board 191 of the electrically controlled setting packer 19 through the second steel pipe cable 22 connected to the lower intelligent node 11. The first cable connector 4a is used to supply power to the electrically controlled setting packer 19. The electrical energy is transmitted to the upper intelligent node 9 through the first steel pipe cable 21. The upper intelligent node 9 transmits the power to the second energy coil 112 of the lower intelligent node 11 through the first energy coil 92, and then to the first cable connector 4a through the second steel pipe cable 22 connected to the lower intelligent node 11, thereby realizing the power supply to the electrically controlled setting packer 19.

[0044] According to the present invention, in such Figure 7 In the preferred embodiment shown, the production distribution device 17 may include a control circuit board 172, a pressure detection module 174, a regulating valve actuator 173, and a cable connector 171. The cable connector 171 on the left is connected to the second steel pipe cable 22, and the cable connector 171 on the right is connected to the next production distribution device 17. After the ground control device 1 issues a control command, it is analyzed by the control circuit board 172 to control the regulating valve actuator 173 to perform opening adjustment. Preferably, the opening adjustment of the production distribution device 17 for no less than 7 layers in a single well is completed, realizing functions such as water shut-off, oil stabilization, and water control in each oil layer. The pressure detection module 174 is used to detect the pressure inside and outside the pipe and upload it to the ground control device 1. The ground control device 1 can provide the flow rate of each sub-open hole section according to the built-in relationship chart between the pressure difference inside and outside the pipe and the flow rate, so as to achieve the purpose of oil stabilization and water control.

[0045] According to the present invention, in such Figure 1 In the preferred embodiment shown, the production string may further include a positioning seal 15 located at the front end of the sand-proof top packer 16, and a casing top packer 13 located between the positioning seal 15 and the lower smart node 11 for suspending and straightening the production string. The casing top packer 13 is provided with a pressure transmission hole and a through hole for the second steel pipe cable 22 to pass through. In this embodiment, the casing top packer 13 is provided to facilitate the settling of formation sand on its upper surface, or the settling of solid scale generated by the reaction between the upper string and the fluid on its upper surface; the pressure transmission hole is provided to prevent the trapping space between the casing top packer 13 and the positioning seal 15 from experiencing a rise in trapping pressure due to the production fluid, thereby affecting the safe setting of the casing top packer 13.

[0046] According to the present invention, in such Figure 9 and Figure 10In the preferred embodiment shown, the drop tool 10 may include a well-holding section 104 connected to the lower smart node 11 and a drop tool 103 connected to the well-holding section 104. The drop tool 103 is connected to the upper smart node 9. Both the drop tool 103 and the well-holding section 104 have through holes for passing through the upper smart node 9. The end of the through hole on the well-holding section 104 facing the upper smart node 9 is formed into a trumpet shape to facilitate the subsequent insertion and docking of the upper smart node 9.

[0047] According to the intelligent sampling process implementation method of the present invention, the above-mentioned intelligent sampling process string 100 is applied, combined with Figure 1 , Figure 9 as well as Figure 10 As shown, the process may include the following steps: Step 1, running the sand control tubing string; Step 2, running the production distribution tubing string through the upper tubing 12, and after the positioning seal 15 is in place, closing the production distribution device 17; Step 3, pressurizing to set the top packer 13 of the casing, continuing to pressurize to disengage the release sub 103 from the well-keeping sub 104, and pulling out the upper tubing 12; Step 4, running the production tubing string to connect the upper smart node 9 and the lower smart node 11; Step 5, the surface control device 1 receives the connection signal and sends a setting command to set the electrically controlled setting packer 19; Step 6, the surface control device 1 adjusts the opening degree of the production distribution device 17 located in each sub-open hole section according to reservoir requirements.

[0048] Preferably, step two may include two implementation methods. For example... Figure 9 In the preferred embodiment shown, in step two, before the upper tubing 12 carrying the production string is lowered, the drop tool 10 (including the drop section 103 and the well-keeping section 104) and the lower smart node 11 can be prefabricated into a tool assembly, and the upper tubing 12 is connected to the drop section 103 of the drop tool 10. After the positioning seal 15 is lowered into place, the test smart node 26 is carried into the upper tubing 12 by the cable 27 and inserted into the lower smart node 11, so that the test smart node 26 and the lower smart node 12 are magnetically coupled. Then, the operation command is issued through the ground control device 1 to shut down the production controller 17. Since the signal of the production controller 17 cannot be tested after the lower smart node 11 is lowered, the communication of the production controller can be tested through the test smart node 26 after the production string is lowered into place. This embodiment can test the communication of the production controller 17 signal in stages.

[0049] In such Figure 10In the preferred embodiment shown, in step two, before the upper tubing 12 carrying the production string is lowered, the upper intelligent node 9, the release tool 10, and the lower intelligent node 11 can be prefabricated into a tool assembly, and the upper tubing 12 can be connected to the upper intelligent node 9. After the positioning seal 15 is lowered into place, an operation command is issued through the ground control device 1 to shut down the production dispenser 17. This embodiment allows for phased testing of the signal of the production dispenser 17 to ensure its normal operation throughout the entire process of lowering the production string.

[0050] According to the intelligent production process implementation method of this embodiment, when the electric submersible pump 7 needs pump inspection, the production tubing is lifted, the upper intelligent node 9 and the lower intelligent node 11 are separated, and the production tubing is retrieved. After pump inspection, the production tubing is connected according to the original tubing and lowered into the well. The upper intelligent node 9 and the lower intelligent node 11 are reconnected and put into place. The ground control device 1 can then re-control and adjust the production distributor 17. This method has the advantages of short construction cycle, high efficiency, and low cost.

[0051] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0052] In the description of this application, it should be understood that the terms "front end", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0053] Furthermore, the terms “first”, “second”, etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A smart sampling process tubing, characterized in that, include: A sand control tube string, the sand control tube string comprising a sand control screen tube located within an open-hole section, a sand control top packer located at the front end of the sand control screen tube, and at least one open-hole segmented sand control packer for segmenting the open-hole section to form a plurality of sub-open-hole sections; The production line includes at least a production dispenser located in each of the sub-open-eye sections, an electrically controlled setting packer that sets and cooperates with the open-eye segment sand-proof packer and is connected to the adjacent production dispenser, a lower intelligent node connected to the foremost production dispenser, and a drop tool connected to the front end of the lower intelligent node. as well as A production string, the production string comprising at least an upper smart node and an electric submersible pump connected sequentially from bottom to top; The upper intelligent node is connected to the ground control device via a first steel pipe cable, the production dispenser is connected to the lower intelligent node via a second steel pipe cable, and the upper intelligent node is magnetically coupled to the lower intelligent node through the drop tool. The upper smart node includes a plug, in which a first energy coil and a first signal coil are sequentially arranged along its axial direction. The lower smart node includes a lower connector with an inner cavity, in which a second energy coil and a second signal coil are sequentially arranged along the axial direction. The plug is inserted into the inner cavity such that the first energy coil and the second energy coil are opposite each other to achieve power transfer, and the first signal coil and the second signal coil are opposite each other to achieve bidirectional signal communication. The intelligent sampling process tubing also includes a positioning detection module. The positioning detection module includes a Hall element disposed in the plug and a magnetic material disposed in the lower connector. The Hall element is located between the first energy coil and the first signal coil, and the magnetic material is located between the second energy coil and the second signal coil. The Hall element includes a first Hall element and a second Hall element spaced apart from top to bottom along the axial direction of the plug. The magnetic material includes a first magnetic ring and a second magnetic ring spaced apart from top to bottom along the axial direction of the lower connector. The first magnetic ring forms a first magnetic field region, and the second magnetic ring forms a second magnetic field region. During the insertion of the plug into the lower connector, when the second Hall element at least partially enters the second magnetic field region and the first Hall element at least partially enters the first magnetic field region, a docking positioning electrical signal is generated. The docking positioning electrical signal is transmitted back to the ground control device through the first steel pipe cable connected to the upper intelligent node.

2. The intelligent sampling process tubing according to claim 1, characterized in that, The production string also includes a telescoping compensator connecting the upper smart node and the electric submersible pump. The first steel pipe cable includes a first connecting section connecting the ground control device and the telescoping compensator and a second connecting section connecting the telescoping compensator and the upper smart node. The telescoping compensator includes a telescoping rod connected to the electric submersible pump and a housing connected to the upper smart node. The housing has an opening and a sliding inner cavity communicating with the opening. The telescoping rod includes a slider that slides into the sliding inner cavity and a rod body connected to the slider. The outer diameter of the slider is larger than the outer diameter of the opening. A spiral steel armor is provided between the slider and the opening. The spiral steel armor is sleeved on the rod body. The rod body is connected to the electric submersible pump. The first connecting section is connected to the rod body, and the second connecting section is connected to the housing.

3. The intelligent sampling process tubing according to claim 1, characterized in that, The electrically controlled setting packer includes a main control circuit board, a micro motor connected to the main control circuit board, a lead screw connected to the micro motor, a rubber cylinder pressure ring connected to the lead screw, a setting rubber cylinder connected to the rubber cylinder pressure ring, and a first cable connector connected to the main control circuit board. The first cable connector is connected to a second steel pipe cable. When setting is required, the ground control device sends a setting command to the main control circuit board. After receiving the setting command, the main control circuit board controls the micro motor to rotate, thereby driving the lead screw to rotate, which in turn drives the rubber cylinder pressure ring to squeeze the setting rubber cylinder, thus achieving setting.

4. The intelligent sampling process tubing according to claim 1, characterized in that, The distribution device includes a control circuit board, a pressure detection module, a regulating valve actuator, and a second cable connector. When the ground control device issues a control command, it is analyzed by the control circuit board to control the regulating valve actuator to adjust the opening. The pressure detection module is used to detect the pressure inside and outside the pipe and upload it to the ground control device. The ground control device provides the flow rate of each sub-naked section based on the built-in relationship chart between the pressure difference inside and outside the pipe and the flow rate.

5. The intelligent sampling process tubing according to claim 1, characterized in that, The production supply string also includes a positioning seal located at the front end of the sand-proof top packer, and a sleeve top packer located between the positioning seal and the lower intelligent node for suspending and straightening the production supply string. The sleeve top packer is provided with a pressure transmission hole and a through hole for the second steel pipe cable to pass through.

6. The intelligent sampling process tubing according to claim 5, characterized in that, The release tool includes a well-holding section connected to the lower smart node and a release section connected to the well-holding section. The release section is connected to the upper smart node. Both the release section and the well-holding section have through holes for passing through the upper smart node. The end of the through hole on the well-holding section facing the upper smart node is formed in a trumpet shape.

7. A method for implementing an intelligent sampling process, using the intelligent sampling process tubing according to claim 6, characterized in that, Includes the following steps: Step 1: Lower the sand control pipe column; Step 2: The production distribution string is lowered through the upper oil pipe. After the positioning seal is in place, the production distribution device is closed. Step 3: Pressurize to set the packer at the top of the casing, continue pressurizing to disengage the release section from the well section, and pull out the upper tubing; Step 4: Lower the production tubing to ensure that the upper intelligent node and the lower intelligent node are properly connected. Step 5: The ground control device receives the docking signal and sends a setting command to set the electrically controlled setting packer. Step six: The ground control device adjusts the opening degree of the production generator located in each of the sub-open hole sections according to the reservoir requirements.

8. The intelligent sampling process implementation method according to claim 7, characterized in that, In step two, before the upper tubing carrying the production string is lowered, the release tool and the lower intelligent node are prefabricated into a tool assembly, and the upper tubing is connected to the release tool. After the positioning seal is lowered into place, a cable is used to carry the test intelligent node into the interior of the upper tubing and insert it into the lower intelligent node, so that the test intelligent node and the lower intelligent node are magnetically coupled. Then, an operation command is issued through the ground control device to shut down the production dispenser. Alternatively, in step two, before the upper tubing carrying the production string is lowered, the upper intelligent node, the release tool, and the lower intelligent node are prefabricated into a tool assembly, and the upper tubing is connected to the upper intelligent node. After the positioning seal is lowered into place, an operation command is issued through the ground control device to shut down the production dispenser.

Images