Electric control opening device for fracturing sliding sleeve

Abstract

The utility model discloses an electric control opening device for a fracturing sliding sleeve. The device comprises an anchoring short section, a pressure transmission shaft, an outer sheath and a plug, wherein one end of the outer sheath is connected with the anchoring short section through an upper fixing screw; the other end of the connecting rod is connected with the plug through a lower fixing screw; the anchoring short section is circumferentially fixed with the pressure transmission shaft through a first limiting mechanism; the anchoring short section is axially fixed with the pressure transmission shaft through a second limiting mechanism; wherein a signal identification unit and a power supply unit are arranged in the outer sheath; a hydraulic driving unit is arranged on the pressure transmission shaft; the power supply unit supplies power to the signal identification unit and the hydraulic driving unit; the signal identification unit is used for identifying whether a built-in RFID tag of the fracturing sliding sleeve is consistent with a preset tag or not and starting the hydraulic driving unit according to an identification result; the technical problems that an existing device is low in sliding sleeve opening construction efficiency and tedious in operation are solved.

Description

Technical Field

[0001] This utility model belongs to the field of casing cementing and fracturing technology, and particularly relates to an electrically controlled opening device for fracturing sliding sleeves. Background Technology

[0002] In the field of oil and gas exploration and development, fracturing technology is one of the important means to improve the production of oil and gas wells. Traditional fracturing technology mainly achieves staged fracturing through perforation and bridge plugs. However, these methods have problems such as complex operation, high cost, and large water consumption. With the advancement of technology, the infinite-stage fracturing sliding sleeve technology has emerged. It can not only greatly simplify the construction process, but also significantly improve fracturing efficiency and oil and gas well production. This patent will introduce an electrically controlled opening device for infinite-stage fracturing sliding sleeves and its construction method, aiming to further optimize fracturing technology and improve the economy and efficiency of oil and gas development.

[0003] In existing unlimited-stage fracturing sliding sleeve technology, mechanical switching devices or soluble bridge plugs are typically used to open and close the sliding sleeve. However, these technologies still need improvement in terms of ease of operation, level of intelligence, and flexibility in fracturing stages. Especially in complex geological conditions and deep well environments, traditional mechanical switching devices require tubing or coiled tubing, which can lead to insufficient fracturing flow rate and thus affect fracturing effectiveness. Furthermore, while soluble bridge plugs can achieve flexible control of fracturing stages, they are affected by factors such as wireline operations and fluid pumping, which impacts fracturing time and increases the cost of fracturing operations. Utility Model Content

[0004] To address the aforementioned problems, this invention proposes an electrically controlled opening device and its construction method for fracturing sliding sleeves. This invention achieves precise capture and opening of the sliding sleeve through an electrical control system, not only improving the intelligence level of fracturing operations but also enabling unlimited and flexible adjustment of the fracturing stages. It effectively solves the current market demand for fracturing operations using sliding sleeves in ultra-long horizontal sections, protecting the integrity of the fracturing wellbore while allowing for an unlimited number of sliding sleeves to be deployed in long horizontal sections. It also improves the fracturing depth, achieving refined fracturing and increasing production efficiency. Furthermore, this device boasts advantages such as simple structure, convenient operation, and safety and reliability, making it suitable for various complex geological conditions and deep well environments.

[0005] This utility model is implemented using the following technical solution:

[0006] An electrically controlled opening device for a fracturing sleeve; the device includes an anchoring short section, a pressure transmission shaft, an outer sheath, and a plug. One end of the outer sheath is connected to the anchoring short section via an upper fixing screw; the other end is connected to the plug via a lower fixing screw. The anchoring short section is circumferentially fixed to the pressure transmission shaft via a first limiting mechanism; the anchoring short section is axially fixed to the pressure transmission shaft via a second limiting mechanism. The outer sheath contains a signal identification unit and a power supply unit; the pressure transmission shaft is equipped with a hydraulic drive unit; the power supply unit supplies power to the signal identification unit and the hydraulic drive unit; the signal identification unit identifies whether the RFID tag built into the fracturing sleeve matches a preset tag and activates the hydraulic drive unit based on the identification result; the hydraulic drive unit, through the first limiting mechanism and the second limiting mechanism, respectively, connects the pressure transmission shaft to the... The separation of the anchoring short section enables sliding sleeve fracturing, wherein: the signal identification unit consists of a receiving antenna, a signal processor, and a control board; the hydraulic drive unit includes a first locking spring, at least two locking balls, a hydraulic valve core, a second locking spring, a push rod, a stop cap, a retaining ring, a connecting screw, an electromagnetic push rod, and an electromagnetic push rod mounting plate; wherein: the pressure transmission shaft is connected to the hydraulic valve core through a hydraulic valve core hole; the locking balls are mounted on the hydraulic valve core; the stop cap is threaded to the pressure transmission shaft; the retaining ring is threaded to the anchoring short section; the locking balls are locked to the hydraulic valve core by the stop cap and the first locking spring, and the hydraulic valve core is located on the hydraulic inner hole of the pressure transmission shaft; the pressure transmission shaft is connected to the push rod through a push rod mounting hole; the electromagnetic push rod is mounted on the electromagnetic push rod mounting plate, and the electromagnetic push rod mounting plate is connected to the retaining ring by a connecting screw.

[0007] Furthermore, the first limiting mechanism consists of a locking block, a pressure ring, and a disc spring; wherein: the anchoring short section is connected to the locking block through the locking block, and the pressure transmission shaft is limited to the locking block in the axial locking groove through the pressure ring and the disc spring; thereby realizing the axial fixation of the pressure transmission shaft in the electrically controlled opening device.

[0008] Furthermore, the second limiting mechanism includes a support block, a limiting pin, and a locking mechanism; the support block is disposed in the support block mounting groove in the anchoring short section, and the pressure transmission shaft is locked by engagement between the circumferential locking groove and the locking groove on the support block; the anchoring short section is connected to the circumferential locking groove disposed on the pressure transmission shaft by the limiting pin installed in the limiting pin mounting hole; thereby realizing the circumferential fixation of the pressure transmission shaft in the electrically controlled opening device; the locking groove is composed of a first conical surface, a second conical surface, a first support surface, and a second inner support surface; the circumferential locking groove is composed of a first cylindrical support surface, a second cylindrical support surface, a first support surface, and a second support surface.

[0009] Furthermore, the pressure transmission shaft is also provided with a one-way sealing unit; the one-way sealing unit includes a cup, a shoulder, and a retaining ring; the shoulder is composed of a slotted groove and an inner ring; the cup is connected to the anchoring short section by a thread; the shoulder and the retaining ring are disposed between the cup and the anchoring short section; a support limiting ring is connected to the pressure transmission shaft.

[0010] Furthermore, the anchoring sub, outer sheath, and plug are made of soluble metal.

[0011] Furthermore, the cup is made of soluble rubber vulcanized on a soluble metal.

[0012] Beneficial effects

[0013] 1. This utility model uses an RFID tag with a built-in sliding sleeve to enter the well. The position of the sliding sleeve is identified by inserting an opening device with a power supply, signal processor, control board and receiving antenna. All electronic control components are sealed with soluble rubber and soluble metal to prevent the antenna and electronic components from being damaged by contact with water.

[0014] 2. This utility model eliminates the need for continuous tubing trucks, cable winches, etc., during fracturing operations. The opening of the sliding sleeve and fracturing can be achieved simply by deploying an opening device at the wellhead, saving construction costs and improving construction efficiency.

[0015] 3. In this utility model, the length of the support block is greater than the gap at the casing coupling connection to avoid accidental locking of the opening device. The support block is fixed by the mechanism on the pressure transmission shaft when entering the well to prevent the support block from bulging out midway, which would cause it to fail to enter the correct position or to open accidentally.

[0016] 4. The metal and sealing rubber materials in this utility model are both water-soluble. After construction, more than 90% of the material in the device will dissolve in water, which will not affect subsequent production and well repair operations.

[0017] 5. In this utility model, one or more antennas are designed to simultaneously identify the tag signals on the sliding sleeve, thereby improving the recognition rate of the sliding sleeve opening device and increasing the success rate of opening and cracking the intelligent sliding sleeve. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an electrically controlled opening device for a fracturing sleeve according to this utility model;

[0019] Figure 2 This is a schematic diagram of a pressure transmission shaft in an electrically controlled opening device for a fracturing sleeve according to this utility model.

[0020] Figure 3 This is a schematic diagram of an anchoring short section in an electrically controlled opening device for a fracturing sleeve according to this utility model;

[0021] Figure 4 This is a schematic diagram of a shoulder guard in an electrically controlled opening device for a fracturing sleeve according to this utility model;

[0022] Figure 5 This is a schematic diagram of a support block in an electrically controlled opening device for a fracturing sleeve according to this utility model;

[0023] Figure 6 This is a schematic diagram of the hydraulic actuator unit of the electrically controlled opening device for fracturing sleeve after activation.

[0024] Figure 7 This is a schematic diagram of the anchored and sealed state in the electrically controlled opening device of the fracturing sleeve according to this utility model;

[0025] Figure label:

[0026] 1. Support limiting ring; 2. Pressure transmission shaft; 3. Leather cup; 4. Shoulder guard; 5. Retaining ring; 6. Anchoring short section; 7. Support block; 8. First locking spring; 9. Locking ball; 10. Hydraulic valve core; 11. Second locking spring; 12. Push rod; 13. Locking block; 14. Adjusting cap; 15. Pressure ring; 16. Disc spring; 17. Limiting pin; 18. Retaining ring; 19. Connecting screw; 20. Electromagnetic push rod mounting plate; 21. Electromagnetic push rod; 22. Outer sheath;

[0027] 23 Control board; 24 Plug; 25 Battery; 26 Signal processor; 27 Receiving antenna; 28 Rubber sealing sleeve; 29 Upper fixing screw; 30 Lower fixing screw; 31 Upper seal; 32 Upper sealing groove; 33 Upper sealing groove

[0028] The pressure transmission shaft 2 is composed of: 201 support block locking groove; 202 first pressure transmission hole; 203 second pressure transmission hole; 204 circumferential locking groove; 205 hydraulic valve core hole; 208 push rod mounting hole; 213 pressure transmission shaft locking groove; 209 support surface one; 210 support surface two; 211 cylindrical support surface one; 212 cylindrical support surface two; slit groove 401; and inner ring 402.

[0029] The anchoring sub section 6 consists of: 601 pressure ring sealing surface; 602 locking block mounting hole; 603 fluid transmission hole; 604 support block mounting groove; 605 limit pin mounting hole; 607 sealing groove outer sleeve; and 608 inner sealing surface.

[0030] The support block 7 is composed of 701 locking groove; 702 inner support surface one; 703 inner support surface two; 704 cone surface one; 705 cone surface two; and 706 anchoring step surface. Detailed Implementation

[0031] Combined with appendix Figure 1-7 The technical solution of this utility model will be further explained.

[0032] like Figure 1 , Figure 2As shown, this utility model provides an electrically controlled opening device for fracturing sleeves. The electrically controlled opening device includes a one-way sealing unit, a signal recognition unit, a hydraulic drive unit, a sleeve anchoring mechanism, and a power supply unit. The anchoring short section 6, the outer sheath 22, and the plug 24 form a soluble metal shell. The anchoring short section 6 is connected to the outer sheath 22 by an upper fixing screw 29, which simultaneously achieves a seal with the outer sheath 22. The outer sheath 22 and the plug 24 are connected by a lower fixing screw 30, which simultaneously seals the outer sheath 22 and the plug 24. A receiving antenna 27 is installed on the plug 24, and a rubber sealing sleeve 28 is installed on the plug 24. The rubber material does not affect signal transmission, and the sealing performance is reliable.

[0033] The signal identification unit consists of a receiving antenna 27, a signal processor 26, a control board 23, and a battery 25. The receiving antenna 27 is installed in a groove on the outer surface of the plug 24 and communicates with the signal processor 26 via a connecting line. The signal processor 26, battery 25, and control board 23 are sealed and protected within the housing. Powered by the battery 25, the receiving antenna 27 continuously receives the tag signal from the sliding sleeve after the power is turned on. The received tag signal is then transmitted to the signal processor 26, which converts the signal and transmits it to the control board 23. The control board 23 compares the received signal with a preset signal. If the received signal matches the preset signal, the control board 23 supplies power to the electromagnetic push rod 21, activating it. The receiving antenna 27, signal processor 26, control board 23, and battery 25 are all within the housing and are not affected by the downhole hydrostatic pressure. The receiving antenna 27 is sealed and protected by a rubber sealing sleeve 28 on the plug 24.

[0034] The hydraulic actuator comprises a pressure transmission shaft 2, a first locking spring 8, a locking ball 9, a hydraulic valve core 10, a second locking spring 11, a push rod 12, a locking block 13, a stop cap 14, a pressure ring 15, a disc spring 16, a limiting pin 17, a retaining ring 18, a connecting screw 19, an electromagnetic push rod 21, and an electromagnetic push rod mounting plate 20; wherein: the anchoring short section is connected to the locking block 13 through the locking block mounting hole 602, and the pressure transmission shaft 2 limits the locking block 13 in the axial locking groove 213 through the pressure ring 15 and the disc spring 16; thus achieving axial fixation of the pressure transmission shaft 2 in the electrically controlled opening device; the anchoring short section 6 is connected to the circumferential locking groove 204 of the pressure transmission shaft 2 through the limiting pin 17 installed in the limiting pin mounting hole 605; thus achieving circumferential fixation of the pressure transmission shaft 2 in the electrically controlled opening device; as Figure 3 As shown:

[0035] The pressure transmission shaft 2 is connected to the hydraulic valve core 10 through the hydraulic valve core hole 205; the locking ball 9 is installed on the hydraulic valve core 10; the stop cap 14 is threadedly connected to the pressure transmission shaft 2; the retaining ring 18 is threadedly connected to the anchoring short section 6; the locking ball 9 is locked in the hydraulic valve core 10 by the stop cap 14 and the first locking spring 8, and the hydraulic valve core 10 seals the hydraulic inner hole on the pressure transmission shaft 2; the pressure transmission shaft is connected to the push rod 12 through the push rod mounting hole 208; the electromagnetic push rod 21 is installed on the electromagnetic push rod. Mounting plate 20, the electromagnetic push rod mounting plate 20 is connected to retaining ring 18 via connecting screw 19, so that electromagnetic push rod 21 and push rod 12 in hydraulic actuator are relatively fixed, and the angle is adjusted to make electromagnetic push rod 21 and push rod 12 in hydraulic actuator concentric, so that electromagnetic push rod 21 can accurately strike push rod 12 in hydraulic actuator after being activated, thereby activating hydraulic actuator; after push rod 12 is struck by electromagnetic push rod 21, locking ball 9 moves half a ball position, locking ball 9 and two balls Fully inserted into the hydraulic valve core hole 205, the hydraulic valve core 10 moves upward under the action of the second locking spring 11, disengaging from the second pressure transmission hole 203 on the pressure transmission shaft 2. The hydrostatic pressure in the second pressure transmission hole 203 enters the upper cavity of the pressure ring 15 through the liquid transmission hole 603. At this time, the upper part of the pressure ring 15 is sealed by the upper sealing groove 32 and the lower sealing groove 33 on the pressure transmission shaft 2 and the inner sealing surface 608 on the anchoring short section 6. The inner diameter and outer diameter of the pressure ring 15 are simultaneously sealed with the inner diameter of the outer sheath 22 and the anchoring short section 6. The sealing surface 601 of the pressure ring on section 6 forms a sealing cavity. At this time, the upper part of the pressure ring 15 is under hydrostatic pressure and the lower part is under atmospheric pressure. Under the action of hydrostatic pressure, the pressure ring 15 moves downward, releasing the radial fixation of the locking block 13. The upper part of the pressure transmission shaft 2 is under hydrostatic pressure and the lower part is under atmospheric pressure. After the pressure transmission shaft 2 enters the well, the deeper it goes, the greater the downward force of the pressure transmission shaft 2 becomes. After the locking block 13 is released from radial locking, it pops out from the locking groove 213 of the pressure transmission shaft, releasing the locking block 13 from locking the pressure transmission shaft 2.

[0036] The one-way sealing unit consists of a support limiting ring 1, a cup 3, a shoulder 4, and a retaining ring 5; wherein: the cup 3 is connected to the anchoring sub 6 via threads; the shoulder 4 and the retaining ring 5 are located between the cup and the anchoring sub 6; the pressure transmitting shaft 2 is connected to the support limiting ring 1. The cup 3 is made of soluble metal vulcanized soluble rubber. The shoulder 4 and the retaining ring 5 are used to improve the pressure bearing capacity of the cup 3 and protect the cup 3 from damage during well entry, thus preventing sealing failure; wherein: the shoulder 4 consists of a slotted groove 401 and an inner ring 402, such as Figure 4As shown, the expansion and sealing of the cup 3 can be satisfied, and the strength of the shoulder 4 can meet the higher pressure of the cup 3. The pressure transmission shaft 2 is connected to the support limiting ring by a thread. The pressure transmission shaft is provided with a first pressure transmission hole 202 to provide hydraulic pressure to the cup. When the pressure transmission shaft 2 moves downward, the support limiting ring 1 is threaded to the pressure transmission shaft 2 and moves downward with the pressure transmission shaft 2. The outer circle of the support limiting ring 1 supports the cup 3. While the cup 3 is supported, the inner ring 402 on the shoulder 4 does not move. The slit groove 401 increases in size as the cup 3 expands until the shoulder 4... The outer circle fits into the inner diameter of the switch sleeve on the sliding sleeve. While the cup 3 seals with the switch sleeve on the sliding sleeve, the supporting limiting ring 1 forms a seal on the cup 3. At this time, the hydrostatic pressure enters the cup 3 through the first pressure transmission hole 202, preventing the cup 3 from forming an internal and external pressure difference under the action of the supporting limiting ring 1. The upper seal 31 on the pressure transmission shaft 2 seals with the inner diameter of the cup 3, achieving a sealing effect for the entire wellbore. The wellhead continues to pressurize, and the anchoring force of the support block 7 and the switch sleeve on the sliding sleeve increases until the switch sleeve on the sliding sleeve opens the sliding sleeve. The cup 3 remains sealed until the fracturing is completed and the cup 3 dissolves on its own.

[0037] The anchoring section 6, support block 7, and pressure transmission shaft 2 form a sliding sleeve anchoring mechanism to prevent the support block 7 from bulging out to the opening device body before transportation and well activation, thus preventing it from being lowered to the designated sliding sleeve position. The locking groove 701 is composed of a first conical surface 704, a second conical surface 705, a first support surface 702, and an inner support surface 703; the circumferential locking groove 204 is composed of a first cylindrical support surface 211, a second cylindrical support surface 212, a first support surface 209, and a second support surface 210; after the hydraulic actuator is activated, the hydraulic pressure transmission shaft 2 descends to release the engagement and locking of the circumferential locking groove 204 on the pressure transmission shaft 2 with the locking groove 701 on the support block 7, and the pressure transmission... As the pressure shaft 2 continues to descend, the first support surface 209 and the second support surface 210 are respectively fitted with conical surfaces 704 and 705. With the continued descent of the pressure shaft 2, the cylindrical support surfaces 211 and 212 on the pressure shaft 2 support the inner support surfaces 702 and 703 on the support block 7, respectively. The support block 7 fully expands, and the anchoring step surface 706 engages with the closing sleeve of the sliding sleeve, achieving anchoring with the sliding sleeve. Figure 7 As shown.

[0038] Implementation process of this utility model:

[0039] An electrically controlled intelligent opening device for fracturing sleeves is applied in fracturing operations. It uses a high-volume feed device to open the target sleeve, allowing fracturing to proceed. The fracturing operation is full-bore fracturing, and the large feed rate improves fracturing efficiency and post-fracturing production. The process includes the following steps: The fracturing sleeve in this invention is a mechanical sleeve with a tagged signal. It is opened and fracturing is performed by lowering the opening device. Taking cementing as an example, the cementing string, from bottom to top, consists of: float shoe connecting collar, cementing casing, toe sleeve, cementing casing, fracturing sleeve, cementing casing, fracturing sleeve, cementing casing, and fracturing sleeves (dozens to hundreds may be lowered depending on the design), connected to the wellhead via the cementing casing. After each fracturing sleeve is lowered to the designed position, fluid circulation begins. Cement is injected into the casing. It is then pumped from the casing float shoe into the annular space between the casing, fracturing sleeve, and wellbore. After calculating and injecting a certain amount of cement, a rubber plug is inserted. Cement is cleaned from the inner walls of the casing and fracturing sleeve. The cement is then pushed to the bottom of the float shoe through the rubber plug for pressing. Once the cement has set, the fracturing wellhead is installed, and the fracturing equipment is replaced. Pressure is applied at the wellhead to open the bottommost toe sleeve, allowing for full wellbore fracturing and opening the connection to the formation. This facilitates the engagement of the electrically controlled start-up device and pumping.

[0040] Position; such as Figure 6As shown: When the fracturing sleeve is lowered, an RFID tag is built in. Based on the tag's signal, the control board 23 is programmed before the opening device enters the well. After the receiving antenna 19 in the opening device identifies the RFID tag on the sleeve, it transmits the signal to the signal processor 26. The signal processor 26 then transmits the signal to the control board 23. The control board 23 compares the tag signal with the preset signal. If the signals are inconsistent, the control board 23 will not operate. When the tag signal matches the signal set in the control board 23, the control board 23 controls the battery 25 to energize the electromagnetic push rod 21. After the electromagnetic push rod 21 is energized, the push rod instantly impacts the push rod 1. 2. Push rod 12 strikes locking ball 9, releasing the locking ball 9 from the hydraulic valve core 10. Under the action of the opening locking spring 11, the hydraulic valve core 10 moves upward to open the channel of pressure transmission hole 203. The hydrostatic pressure enters the upper cavity of pressure ring 15 through transmission hole 603. Pressure ring 15 moves downward to release the locking block 13 from locking the pressure transmission shaft 2. The pressure transmission shaft 2 moves downward under the action of hydrostatic pressure to open the support block 7. At the same time, the support limiting ring 1 opens the cup 3. The support block 7 is anchored on the switch sleeve of the sliding sleeve, and the cup 3 is sealed on the switch sleeve of the sliding sleeve. By applying pressure at the wellhead, the opening device drives the switch sleeve of the sliding sleeve to move downward to open the sliding sleeve and carry out fracturing operations. According to the label signal on the sliding sleeve, the corresponding opening device is engaged. Fracturing is started from the sliding sleeve farthest from the wellhead, and then sequentially to the sliding sleeves near the wellhead, until all the designed fracturing sliding sleeves are opened and fracturing is completed. After fracturing, the rubber and metal parts of the opening device, made of soluble materials, slowly dissolve inside the well until the opening device is completely dissolved, achieving full wellbore clearance without affecting the running of the tubing during well workover. Specific process:

[0041] S1. The fracturing sleeve is lowered into the casing. The bottom end is connected to the sleeve. During the lowering process, the fracturing sleeve is equipped with RFID tag information that is recorded in detail along with the well data. During fracturing operations, the control panel on the opening device can be set according to the tag information. When fracturing begins, the differential pressure sleeve at the farthest end of the wellhead is opened by pressurizing the entire wellbore to carry out fracturing operations, which facilitates the later deployment of the opening device and pumping into place.

[0042] S2. After the fracturing sliding sleeve is lowered into place along with the casing, it can be cemented to fix the fracturing sliding sleeve and casing inside the wellbore, becoming an integral part of the formation. The cementing can be applied in precise layers and sections. After cementing, the sealing performance of the tubing string is verified by wellhead pressure testing. After the cement solidifies, the fracturing wellhead is replaced for re-pressure testing. Simultaneously, the furthest differential pressure sliding sleeve is opened to perform fracturing operations on the first section.

[0043] When the first layer of fracturing is completed, the first electrically controlled opening device is activated to open the first fracturing sleeve on the differential pressure sleeve.

[0044] S3. During the feeding process, the electronically controlled opening device passes through multiple fracturing sleeves. Each time it passes through a fracturing sleeve, the receiving antenna on the electronically controlled opening device will capture the tag signal on each sleeve in real time. When the electronically controlled opening device reaches the target infinite-level intelligent fracturing sleeve, the received tag signal is completely consistent with the signal set by the electronically controlled opening device. After the control board in the electronically controlled opening device issues a command, it starts the electromagnetic push rod to stimulate the push rod. After the push rod is impacted, it releases the locking ball from locking the hydraulic valve core and opens the hydraulic channel. After the hydraulic channel is opened, it pushes the pressure ring to move down and opens the locking block from locking the pressure transmission shaft. The pressure transmission shaft moves down and expands the support block. At the same time, the cup is supported by the limiting ring to move down and expand the cup during the downward movement of the pressure transmission shaft, so that the cup is sealed on the switch sleeve of the sleeve. The support block is anchored on the switch sleeve of the sleeve, completing the locking process of the electronically controlled opening device.

[0045] S4. After locking is completed, the upper water pressure is applied to the electrically controlled opening device. Through wellhead pressurization, the electrically controlled opening device drives the switch sleeve of the fracturing slide sleeve to open the fracturing channel and start the fracturing operation.

[0046] S5. After fracturing one layer, put in the corresponding electric control opening device of the fracturing slide sleeve of the previous layer to open the fracturing slide sleeve of the previous layer. Put in the corresponding opening device in sequence according to the order of the fracturing slide sleeves, and fracture layer by layer from far to near.

[0047] S6. After all fracturing stages are completed, the soluble metal and rubber components of the electrically controlled opening device will dissolve in the well fluid, achieving full-bore fracturing sleeve operation, which facilitates subsequent sleeve closure operations or re-fracturing operations.

[0048] It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electrically controlled opening device for fracturing sliding sleeve; the device comprises an anchor pup joint, a pressure transmission shaft, an outer sheath and a plug, one end of the outer sheath is connected with the anchor pup joint through an upper fixing screw; the other end of the outer sheath is connected with the plug through a lower fixing screw; characterized in that: The anchor short section is fixed in the axial direction by the first limiting mechanism and in the circumferential direction by the second limiting mechanism; the outer sheath is provided with a signal identification unit and a power supply unit; the transmission pressure shaft is provided with a hydraulic drive unit; the power supply unit supplies power to the signal identification unit and the hydraulic drive unit; the signal identification unit is used to identify whether the built-in RFID tag of the fracturing sliding sleeve is consistent with the preset tag and to start the hydraulic drive unit according to the identification result; the hydraulic drive unit separates the transmission pressure shaft from the anchor short section through the first limiting mechanism and the second limiting mechanism to realize the fracturing of the sliding sleeve, wherein the signal identification unit is composed of a receiving antenna, a signal processor and a control board; the hydraulic drive unit includes a first lock spring, at least two locking balls, a hydraulic valve core, a second lock spring, a push rod, a blocking cap, a blocking ring, a connecting screw, an electromagnetic push rod and an electromagnetic push rod mounting plate; wherein the transmission pressure shaft is connected with the hydraulic valve core through a hydraulic valve core hole; the locking ball is installed on the hydraulic valve core; the blocking cap is threadedly connected with the transmission pressure shaft; the blocking ring is connected with the anchor short section through threads; the locking ball is locked on the hydraulic valve core through the blocking cap and the first lock spring; the hydraulic valve core is arranged on the hydraulic inner hole of the transmission pressure shaft; the transmission pressure shaft is connected with the push rod through a push rod mounting hole; the electromagnetic push rod is mounted on the electromagnetic push rod mounting plate, and the electromagnetic push rod mounting plate is connected with the blocking ring through the connecting screw.

2. An electrically controlled opening device for a fracturing sliding sleeve according to claim 1, characterized in that: The first limiting mechanism is composed of a lock block, a pressure ring and a disc spring; wherein the anchor short section is connected with the lock block, and the transmission pressure shaft limits the lock block in the axial locking groove through the pressure ring and the disc spring; the axial fixation of the transmission pressure shaft in the electrically controlled opening device is realized.

3. The electrically controlled opening device for fracturing sliding sleeve according to claim 1, characterized in that: The second limiting mechanism includes a support block, a limiting pin and a locking mechanism; the support block is arranged in the support block mounting groove in the anchor short section, the transmission pressure shaft is locked through the engagement of the circumferential locking groove and the locking groove on the support block, and the anchor short section is connected with the circumferential locking groove of the transmission pressure shaft through the limiting pin arranged in the limiting pin mounting hole; The circumferential fixation of the transmission pressure shaft in the electrically controlled opening device is realized; the locking groove is composed of a conical surface one, a conical surface two, a support surface one and an inner support surface two; the circumferential locking groove is composed of a cylindrical support surface one, a cylindrical support surface two, a support surface one and a support surface two.

4. The electrically controlled opening device for fracturing sliding sleeves according to claim 1, characterized in that: The transmission pressure shaft is also provided with a one-way sealing unit; the one-way sealing unit includes a leather cup, a shoulder and a check ring; the shoulder is composed of a slit groove and an inner ring; the leather cup is connected with the anchor short section through threads; the shoulder and the check ring are arranged between the leather cup and the anchor short section; the transmission pressure shaft is connected with a support limiting ring.

5. An electrically controlled opening device for a fracturing sliding sleeve according to any one of claims 1-4, characterized in that: The anchor short section, the outer sheath and the plug are made of soluble metal.

6. An electrically controlled opening device for a fracturing sliding sleeve according to claim 4, characterized in that: The leather cup is made of soluble rubber vulcanized on the soluble metal.

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