Marine carbon dioxide sequestration efficient jet injection tool

Abstract

The invention discloses an efficient jet injection tool for marine carbon dioxide sequestration, which relates to the technical field of carbon dioxide hydrate sequestration tools and mainly comprises a continuous pipe quick connector, an open hole anchor sealing mechanism, a sliding core locking mechanism and a jet injection head. A deep tooth slip, a long rubber sleeve, an upper one-way valve plate and a lower one-way valve plate are adopted in the open hole anchoring sealing mechanism, and the reliability and stability of the tool during carbon dioxide injection operation are enhanced; the sliding core locking mechanism is provided with a sliding core cylinder I, a sliding core cylinder II, a locking connector, an inclined plane guide ring and a reset spring I, so that the opening and closing of an injection function are automatically controlled; the device is simple in structural design, anchoring and setting can be achieved under the condition of open hole drilling, and jetting injection of carbon dioxide can be achieved under the condition that a pipe column is not lifted or placed or other tools are not put down; the tool not only ensures continuity and high efficiency of operation, but also greatly reduces operation cost and environmental risks.

Description

Technical Field

[0001] The invention relates to the technical field of carbon dioxide hydrate storage tools, and in particular to a high-efficiency jet injection tool for marine carbon dioxide storage. Background Art

[0002] Marine carbon dioxide storage technology, as a key link in the global carbon reduction strategy, mainly covers two categories: marine water storage and marine geological storage. The former is directly stored in seawater or on the seabed surface, and typical applications include the construction of submarine carbon dioxide lakes. The latter makes full use of the natural geological structure of the seabed, including submarine sediment storage, saline layer storage, oil and gas reservoir storage and basalt layer storage. Its storage principle is based on the interaction between carbon dioxide and geological structure, that is, the injected carbon dioxide is surrounded by low-permeability rocks and undergoes processes such as closure, dissolution, binding, adsorption and mineralization, and finally achieves long-term stable storage.

[0003] In view of the special environment and technical challenges of marine carbon dioxide geological storage, marine carbon dioxide injection tools must meet the following key points: ① When high-pressure carbon dioxide is injected, it can fix the downhole tubing and seal the annulus to prevent the injected carbon dioxide from escaping; ② It can realize carbon dioxide injection under the premise of lowering the tubing in one trip; ③ The tool structure should be simple and the performance should be reliable.

[0004] After comprehensive market research and technical evaluation, there is currently no relevant downhole injection tool that can fully and efficiently meet all the above functional requirements. In view of this, it is urgent to invent an efficient jet injection tool for marine carbon dioxide storage. Summary of the invention

[0005] In view of the special environment and technical challenges of marine carbon dioxide geological storage, an efficient jet injection tool for marine carbon dioxide storage was invented. It consists of a continuous pipe quick connector, an open hole anchor sealing mechanism, a sliding core locking mechanism, and a jet injection head. The open hole anchoring and sealing mechanism adopts deep tooth slips, long rubber tubes, upper one-way valve plates and lower one-way valve plates, which ensure the stability of the downhole tubing during the injection injection operation, and realize the tight sealing of the annulus during the high-pressure carbon dioxide injection process, effectively preventing carbon dioxide leakage, ensuring the sealing efficiency and environmental safety, and enhancing the reliability and practicality of the tool during carbon dioxide injection injection operations; the sliding core locking mechanism is equipped with sliding core tube I, sliding core tube II, locking connection, inclined guide ring, and reset spring I, which realizes the automatic control of the opening and closing of the injection injection function, and realizes the completion of carbon dioxide injection in a single trip of lowering the tubing, simplifying the operation process; the device has a concise structural design, can realize anchoring and sealing in the case of open hole drilling, and can also realize carbon dioxide injection without lifting and lowering the tubing or lowering other tools; the tool not only ensures the continuity and efficiency of the operation, but also greatly reduces the operation cost and environmental risk.

[0006] The following technical solution is adopted by the present invention to solve the technical problem: a high-efficiency jet injection tool for marine carbon dioxide storage, mainly composed of a coiled pipe quick connector, a naked hole anchor sealing mechanism, a sliding core locking mechanism, and a jet injection head, characterized in that:

[0007] The coiled tubing quick connector is composed of a connector clamping ring, a coiled tubing insertion connector, a stop pin, and a rubber sealing ring I: the connector clamping ring and the coiled tubing insertion connector are connected to each other in cooperation, the rubber sealing ring I is installed at the head end of the coiled tubing insertion connector, and the stop pin is installed in the middle of the coiled tubing insertion connector;

[0008] The open-hole anchoring sealing mechanism is composed of an anchoring sealing seat, an upper one-way valve plate, a reset spring I, a gasket, a nut, a deep-toothed slip, a reset spring II, a deep-toothed slip sleeve, a screw, an upper long rubber tube seat, a long rubber tube, a lower long rubber tube seat, a lower one-way valve plate, and a rubber sealing ring II: the front end of the anchoring sealing seat is provided with a self-locking shoulder, a shear pin groove, and a limit shoulder on the outside, and the front end is provided with a plurality of trapezoidal upper liquid inlets, the middle part is provided with a deep-toothed slip seat, a deep-toothed slip sleeve mounting groove, a screw hole, a long rubber tube seat mounting platform, and a long rubber tube mounting platform, and a plurality of liquid inlet channels and sealing grooves are provided inside, a plurality of trapezoidal lower liquid outlet holes are provided at the rear end, and a plurality of one-way valve mounting holes are provided at the front and rear ends respectively. The upper liquid inlet, deep-toothed slip seat, liquid inlet channel, sealing groove, and lower liquid outlet are interconnected, and the head end thereof is connected to the continuous pipe insertion joint. The upper one-way valve plate, reset spring I, gasket, and nut are sequentially connected and assembled and installed inside the head end of the anchoring packing seat. The deep-toothed slip, reset spring II, and deep-toothed slip sleeve are assembled and installed in the middle of the anchoring packing seat by screws. The long rubber sleeve is mounted on the anchoring packing seat. The upper long rubber sleeve seat and the lower long rubber sleeve seat are fixed at both ends of the long rubber sleeve. The lower one-way valve plate, reset spring I, gasket, and nut are sequentially connected and assembled and installed inside the end of the anchoring packing seat. The rubber sealing ring II is installed at the end of the deep-toothed slip.

[0009] The sliding core locking mechanism is composed of a sliding core tube I, a sliding core tube II, a locking connection, a bevel reset ring, a reset spring III, an outer cylinder body, and a rubber sealing ring IV: the locking connection head end is provided with a connecting thread I, the middle part is provided with a connecting boss, the tail part is provided with a guiding self-locking bevel, and is connected to the tail part of the anchoring isolation seat; the sliding core tube I head end is provided with a pressure drop bevel, the front end is provided with a limit boss, the tail part is provided with a liquid outlet and a sealing groove III, and is installed inside the anchoring isolation seat; the sliding core tube II is sleeved in the locking connection, the bevel reset ring is sleeved on the sliding core tube II, and the head end is in contact with the tail part of the locking connection; the reset spring III is sleeved on the sliding core tube II, and the head end is in contact with the bevel reset ring; the outer cylinder body is sleeved on the outside of the locking connection, the bevel reset ring, and the reset spring III, and the head end is connected to the middle part of the locking connection; the rubber sealing ring III is installed on the sliding core tube I, and the rubber sealing ring IV is installed on the sliding core tube II;

[0010] The jet injection head consists of a jet injection head, an injection nozzle, and a sealing plug: the head end of the jet injection head is provided with a connecting thread III, and several groups of injection nozzle mounting holes are provided circumferentially in different axial segments, which are arranged in a spiral manner, and a jet injection cavity is provided inside, which is connected to the tail end of the outer cylinder body, the injection nozzle is installed on the jet injection head, and the sealing plug is installed at the tail of the jet injection head.

[0011] The head end of the continuous pipe insertion joint is provided with a sealing groove I, the middle part is provided with a pin shearing groove, and the inside is provided with a truncated cone-shaped boss. The sealing groove I is used to install a rubber sealing ring I, the pin shearing groove is used to install a limit pin, and the truncated cone-shaped boss is in contact with the head end of the anchor packing seat;

[0012] The upper part of the deep-tooth slip is provided with a limiting groove, the middle part is provided with a reset spring installation groove, and the lower part is provided with a sealing groove II; the limiting groove is in contact with the deep-tooth slip sleeve, the reset spring installation groove is used to install the reset spring II, and the deep-tooth slip seat, the deep-tooth slip sleeve installation groove, and the screw hole are respectively connected with the deep-tooth slip, the reset spring II, the deep-tooth slip sleeve, and the screw;

[0013] The lower long rubber tube seat has a transition arc surface at the head end, a limit mounting boss in the middle, and a mounting thread at the tail end. The transition arc surface contacts the outside of the long rubber tube, the limit mounting boss contacts the front end of the long rubber tube, and the mounting thread is connected to the anchoring and sealing seat.

[0014] The locking connection head end connecting thread I is connected to the anchoring packing seat, the connecting boss is in contact with the outer cylinder, and the guiding self-locking inclined surface is in contact with the inclined surface reset ring; the outer cylinder is provided with a connecting thread II at the front end, a boss is provided in the middle, and a limit connecting boss is provided at the tail, the connecting thread II is connected to the locking connection, the boss is in contact with the tail of the reset spring III, and the limit connecting boss is connected to the injection injection head;

[0015] A sealing plug mounting platform is provided inside the end of the jet injection head, and the jet nozzle mounting hole is connected to the jet injection cavity;

[0016] The upper one-way valve plate is provided with a valve plate at the head end, a connecting screw is provided in the middle part, and a connecting thread IV is provided at the tail end. The valve plate is matched with the upper liquid inlet, and the connecting screw passes through the one-way valve installation hole of the anchoring sealing seat and is connected with a gasket and a nut;

[0017] The front end of the sliding core cylinder II is provided with a connecting thread V, the front end is provided with a limiting guide boss and contact teeth, and the middle part is provided with a guide groove and a sealing groove IV.

[0018] The beneficial effects of the present invention are:

[0019] 1. The tool is designed with an open hole anchoring mechanism that can operate in open hole drilling, ensuring the stability of the pipe string and the tight sealing of the annulus during high-pressure carbon dioxide injection operations, effectively preventing carbon dioxide leakage and ensuring storage efficiency and environmental safety;

[0020] 2. By designing a sliding core self-locking mechanism in the tool, the opening and closing of the jet injection function can be automatically controlled. The jet injection of carbon dioxide can be realized without lifting or lowering the pipe string or running other tools, which simplifies the operation process and improves the operation efficiency and economy;

[0021] 3. The structure design of the jet injection tool is concise. Through the combination of key components, it realizes the integration of complex functions and forms an efficient and stable working system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the appearance diagram of the present invention;

[0023] Figure 2 This is a diagram of a coiled pipe quick connector according to the present invention;

[0024] Figure 3 This is a plan view of the coiled pipe quick connector of the present invention;

[0025] Figure 4 This is a diagram of the open hole anchoring mechanism of the present invention;

[0026] Figure 5 This is a plan view of the open hole anchoring mechanism of the present invention;

[0027] Figure 6 This is a diagram of the sliding core locking mechanism of the present invention;

[0028] Figure 7 This is a plan view of the sliding core locking mechanism of the present invention;

[0029] Figure 8 It is a diagram of the jet injection head of the present invention;

[0030] Fig. 9 This is a plan view of the jet injection head of the present invention

[0031] Fig.10 This is a diagram of the continuous pipe insertion joint of the present invention;

[0032] Fig.11 This is a plan view of the coiled pipe insertion joint of the present invention;

[0033] Fig.12 Anchor seal diagram for the present invention;

[0034] Fig.13 This is a planing diagram of the anchor seal of the present invention;

[0035] Fig.14 It is the deep tooth kavatu of the present invention;

[0036] Fig.15 It is a long rubber tube diagram of the present invention;

[0037] Fig.16It is a diagram of the long rubber tube of the present invention;

[0038] Fig.17 This is a planed surface view of a long rubber tube of the present invention;

[0039] Fig.18 The locking connection diagram of the present invention;

[0040] Fig.19 This is a diagram of the inclined plane reset ring of the present invention;

[0041] Fig. 20 It is a diagram of the jet injection head of the present invention;

[0042] Fig.21 This is a plan view of the jet injection head of the present invention;

[0043] Fig. 22 FIG. 1 is a diagram of the injection nozzle of the present invention;

[0044] Fig.23 The one-way valve of the present invention;

[0045] Fig.24 This is the sliding core barrel I of the present invention;

[0046] Fig.25 This is the sliding core barrel II diagram of the present invention;

[0047] Fig.26 This is the outer cylinder diagram of the present invention;

[0048] Fig. 27 This is a plan view of the outer cylinder of the present invention;

[0049] In the figure, 1-joint clamping ring, 2-continuous pipe insertion joint, 201-sealing groove I, 202-pin shearing groove, 203-cone-shaped boss, 3-limiting pin, 4-anchoring packing seat, 401-check valve mounting hole, 402-shear pin groove, 403-limiting shoulder, 404-screw hole, 405-deep tooth slip seat, 406-deep tooth slip sleeve mounting groove, 407-long rubber tube seat mounting platform, 408-long rubber tube mounting platform, 409-seat sealing groove, 4010-self-locking shoulder, 4011- Upper liquid inlet, 4012-liquid inlet channel, 4013-lower liquid outlet, 5-deep tooth slip, 501-limiting groove, 502-reset spring installation groove, 6-deep tooth slip sleeve, 7-screw, 8-upper long rubber cylinder seat, 801-, 802-, 803-, 9-long rubber cylinder, 10-lower long rubber cylinder seat, 1001-limiting installation boss, 1002-installation thread, 1003-excess arc surface, 11-locking connection, 1101-connecting thread I, 1102-connecting boss, 1103-guide Towards self-locking inclined plane, 12-outer cylinder, 1201-connecting thread II, 1202-boss, 1203-limiting connecting boss, 13-injection injection head, 1301-connecting thread III, 1302-injection injection chamber, 1303-injection nozzle mounting hole, 14-injection nozzle, 15-rubber sealing ring I, 16-upper one-way valve plate, 1601-valve plate, 1602-connecting screw, 1603-connecting thread IV, 17-reset spring I, 18-nut, 19-gasket, 20-reset spring II , 21-rubber sealing ring Ⅱ, 22-sliding core tube Ⅰ, 2201-pressure drop slope, 2202-limiting boss, 2203-sealing groove Ⅲ, 2204-liquid outlet, 23-rubber sealing ring Ⅲ, 24-lower one-way valve plate, 25-sliding core tube Ⅱ, 2501-connecting thread Ⅴ, 2502-limiting guide boss, 2503-contact tooth, 2504-guide groove, 2505-sealing groove Ⅳ, 26-inclined reset ring, 27-reset spring Ⅲ, 28-rubber sealing ring Ⅳ, 29-sealing plug. DETAILED DESCRIPTION

[0050] The present invention is further described below in conjunction with the accompanying drawings, and the protection scope of the present invention is not limited to the following:

[0051] like Figures 1 to 27 As shown, a high-efficiency jet injection tool for marine carbon dioxide storage is mainly composed of a safety joint mechanism, a mechanical sliding core locking mechanism, an anchoring mechanism, a sealing mechanism, and a jet cavity fracturing injection mechanism, characterized in that: a high-efficiency jet injection tool for marine carbon dioxide storage is mainly composed of a coiled tubing quick joint, a naked hole anchor sealing mechanism, a sliding core locking mechanism, and a jet injection head, characterized in that:

[0052] The continuous pipe quick connector, such as Figures 2-3As shown, it is composed of a joint clamping ring 1, a continuous pipe insertion joint 2, a stop pin 3, and a rubber sealing ring Ⅰ15: the joint clamping ring 1 and the continuous pipe insertion joint 2 are connected with each other, the rubber sealing ring Ⅰ15 is installed at the head end of the continuous pipe insertion joint 2, and the stop pin 3 is installed in the middle of the continuous pipe insertion joint 2;

[0053] The open hole anchoring mechanism, such as Figures 4-5 As shown, it is composed of an anchoring packing seat 4, an upper one-way valve plate 16, a reset spring I 17, a gasket 19, a nut 18, a deep-toothed slip 5, a reset spring II 20, a deep-toothed slip sleeve 6, a screw 7, an upper long rubber cylinder seat 8, a long rubber cylinder 9, a lower long rubber cylinder seat 10, a lower one-way valve plate 24, and a rubber sealing ring II 21: the front end of the anchoring packing seat 4 is provided with a self-locking shaft shoulder 4011, a shear pin groove 402, a limit shaft shoulder 4 03, a plurality of trapezoidal upper liquid inlets 4012 are arranged inside the head end, a deep tooth slip seat 405, a deep tooth slip sleeve mounting groove 406, a screw hole 404, a long rubber cylinder seat mounting platform 407, a long rubber cylinder mounting platform 408 are arranged in the middle, a plurality of liquid inlet channels 4013 and a sealing groove 409 are arranged inside, a plurality of trapezoidal lower liquid outlet holes 4014 are arranged at the tail end, and a plurality of one-way valve mounting holes 4014 are arranged at the head and tail ends respectively. 1. The upper liquid inlet 4012, the deep-toothed slip seat 405, the liquid inlet channel 4013, the sealing groove 409, and the lower liquid outlet 4014 are interconnected, and the head end thereof is connected to the continuous pipe insertion joint 2. The upper one-way valve plate 16, the reset spring I 17, the gasket 19, and the nut 18 are sequentially connected and assembled and installed inside the head end of the anchoring packing seat 4. The deep-toothed slip 5, the reset spring II 20, and the deep-toothed slip sleeve 6 are assembled and installed in the middle of the anchoring packing seat 4 through the screw 7. The long rubber cylinder 9 is sleeved on the anchoring packing seat 4. The upper long rubber cylinder seat 8 and the lower long rubber cylinder seat 10 are fixed at both ends of the long rubber cylinder 9. The lower one-way valve plate 24, the reset spring I 17, the gasket 19, and the nut 18 are sequentially connected and assembled and installed inside the end of the anchoring packing seat 4. The rubber sealing ring II 21 is installed at the end of the deep-toothed slip 5;

[0054] The sliding core locking mechanism, such as Figures 6-7As shown, it is composed of a sliding core tube Ⅰ22, a sliding core tube Ⅱ25, a locking connection 11, a bevel reset ring 26, a reset spring Ⅲ27, an outer cylinder 12, and a rubber sealing ring Ⅳ28: the locking connection 11 is provided with a connecting thread Ⅰ1101 at the head end, a connecting boss 1102 in the middle, and a guiding self-locking bevel 1103 at the tail, which is connected to the tail of the anchoring isolation seat 4; the sliding core tube Ⅰ22 is provided with a pressure drop bevel 2201 at the head end, a limiting boss 2202 at the front end, a liquid outlet 2204 and a sealing groove Ⅲ2203 at the tail, and is installed on the anchoring isolation seat 4, the sliding core cylinder II 25 is sleeved in the locking connection 11, the inclined reset ring 26 is sleeved on the sliding core cylinder II 25, and the head end is in contact with the tail of the locking connection 11, the reset spring III 27 is sleeved on the sliding core cylinder II 25, and the head end is in contact with the inclined reset ring 26, the outer cylinder 12 is sleeved on the locking connection 11, the inclined reset ring 26, and the reset spring III 27, and the head end is connected to the middle of the locking connection 11, the rubber sealing ring III 23 is installed on the sliding core cylinder I 22, and the rubber sealing ring IV 28 is installed on the sliding core cylinder II 25;

[0055] The jet injection head, such as Figures 8-9 As shown, it consists of a jet injection head 13, an injection nozzle 14, and a sealing plug 29: the head end of the jet injection head 13 is provided with a connecting thread III 1301, and different axial segments are circumferentially provided with a plurality of groups of nozzle mounting holes 1303, which are arranged in a spiral manner, and a jet injection cavity 1302 is provided inside, which is connected to the tail end of the outer cylinder 12, the injection nozzle 14 is installed on the jet injection head 13, and the sealing plug 29 is installed at the tail of the jet injection head 13.

[0056] The first end of the continuous pipe insertion joint 2 is provided with a sealing groove I 201. Figures 10-11 As shown, a pin shearing groove 202 is provided in the middle, and a truncated cone-shaped boss 203 is provided inside. The sealing groove I 201 is used to install the rubber sealing ring I 15, the pin shearing groove 103 is used to install the limit pin 3, and the truncated cone-shaped boss 104 is in contact with the head end of the anchoring packing seat 4;

[0057] The deep tooth slip 5, as Fig.14 As shown, a limiting groove 501 is provided at the upper part, a reset spring installation groove 502 is provided at the middle part, and a sealing groove II 503 is provided at the lower part; the limiting groove 501 is in contact with the deep-toothed slip sleeve 6, the reset spring installation groove 502 is used to install the reset spring II 20, and the deep-toothed slip seat 405, the deep-toothed slip sleeve installation groove 406, and the screw hole 404 are respectively connected with the deep-toothed slip 5, the reset spring II 20, the deep-toothed slip sleeve 6, and the screw 7;

[0058] The lower long rubber tube seat 10, as Figures 16-17As shown, a transition arc surface 1003 is provided at the head end, a position-limiting mounting boss 1001 is provided at the middle part, and a mounting thread 1002 is provided at the tail end, the transition arc surface 1003 is in contact with the outside of the long rubber tube 9, the position-limiting mounting boss 1001 is in contact with the front end of the long rubber tube 9, and the mounting thread 1002 is connected with the anchoring packing seat 4;

[0059] The locking connection 11, such as Fig.18 As shown, the head end is provided with a connecting thread Ⅰ1101, the middle part is provided with a connecting boss 1102, and the tail part is provided with a guiding self-locking inclined surface 1103. The connecting thread Ⅰ1101 is connected to the anchoring packing seat 4, the connecting boss 1102 is in contact with the outer cylinder 12, and the guiding self-locking inclined surface 1103 is provided. Fig.19 As shown, it contacts the inclined reset ring 26; the outer cylinder 12, as Figures 26-27 As shown, a connection thread II 1201 is provided at the front end, a boss 1202 is provided at the middle part, and a limit connection boss 1203 is provided at the tail part, the connection thread II 1201 is connected to the locking connection 11, the boss 1202 contacts the tail part of the return spring III 27, and the limit connection boss 1203 is connected to the injection head 13;

[0060] The jet injection head 13, as Figures 8-9 As shown, a sealing plug mounting platform 1304 is provided inside the end, and the injection nozzle mounting hole 1303 is connected to the injection cavity 1302;

[0061] The upper one-way valve plate 16, as Fig.23 As shown, a valve plate 1601 is provided at the head end, a connecting screw 1602 is provided in the middle, and a connecting thread IV 1603 is provided at the tail end. The valve plate 1601 cooperates with the upper liquid inlet 4012, and the connecting screw 1602 passes through the one-way valve installation hole 401 of the anchoring isolation seat 4 and is connected with the gasket 19 and the nut 18;

[0062] The sliding core tube Ⅰ22, such as Fig.24 As shown, a pressure drop slope 2201 is provided inside the head end, a limiting boss 2202 is provided at the front end, and a liquid outlet 2204 and a sealing groove 2203 are provided at the tail end; the sliding core cylinder II 25, as shown Fig.25 As shown, a connecting thread V 2501 is provided inside the head end, a limiting guide boss 2502 and a contact tooth 2503 are provided at the front end, and a guide groove 2504 and a sealing groove IV 2505 are provided in the middle.

[0063] The specific steps for using this device are as follows:

[0064] The joint is tightened with the ring 1, and the continuous pipe is inserted into the joint 2 and connected with the continuous tubing. The joint is lowered to the target layer on the seabed through the offshore floating platform, and the drilling fluid flow rate is increased. After the large-flow drilling fluid flows through the pressure drop slope 2201 at the head end of the sliding core tube I 22, the sliding core tube I 22 and the sliding core tube II 25 move downward. When the end of the sliding core tube II 25 contacts the sealing plug 29, the sliding core stops moving. The large-flow drilling fluid with a certain pressure pushes the upper check valve plate 16 into the liquid inlet channel 4012 through the upper liquid inlet 4011 at the front end of the anchoring packing seat 4, and sets the sealing groove 409 until it stops at the lower check valve plate 24. This process makes the deep tooth slip 5 and the long rubber tube 9 set. The injection medium is changed, and the liquid carbon dioxide reaches the tool through the continuous tubing. The injection flow and pressure of the liquid carbon dioxide are controlled so that the flow and pressure of the liquid carbon dioxide are not enough to move the sliding core and push the upper check valve plate, thereby achieving the purpose of functional self-locking. The liquid carbon dioxide passes through the core slide tube I 22 and the core slide tube II 25 and enters the injection cavity 1302 of the injection head 13 from the guide groove 2504, and is finally ejected through the injection nozzle 14 to achieve the purpose of carbon sequestration. When the carbon sequestration amount reaches the target value, the liquid carbon dioxide injection flow rate is changed, and the core slide tube I 22 and the core slide tube II 25 move upward under the action of the return spring III 27. At this time, the liquid outlet 2204 on the core slide tube I 22 coincides with the lower liquid outlet hole 4013, so that the drilling fluid retained in the liquid inlet channel 4012 and the sealing groove 409 can flow out, achieving the purpose of sealing.

[0065] Obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] In the description of the present invention, it should be noted that the directions or positional relationships indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are directions or positional relationships based on the drawings, which 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, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0067] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0069] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.

Claims

1. An efficient jet injection tool for marine carbon dioxide storage, comprising a coiled tubing quick connector, an open hole anchor sealing mechanism, a sliding core locking mechanism, and a jet injection head, characterized in that: The coiled tubing quick connector is composed of a connector clamping ring (1), a coiled tubing insertion connector (2), a stop pin (3), and a rubber sealing ring I (15). The connector clamping ring (1) and the coiled tubing insertion connector (2) are connected to each other in a coordinated manner, the rubber sealing ring I (15) is installed at the head end of the coiled tubing insertion connector (2), and the stop pin (3) is installed at the middle of the coiled tubing insertion connector (2). The open hole anchoring mechanism comprises an anchoring seal seat (4), an upper one-way valve plate (16), a reset spring I (17), a gasket (19), a nut (18), a deep tooth slip (5), a reset spring II (20), a deep tooth slip sleeve (6), a screw (7), an upper long rubber cylinder seat (8), a long rubber cylinder (9), a lower long rubber cylinder seat (10), a lower one-way valve plate (24), and a rubber sealing ring II (21). The front end of the anchoring seal seat (4) is provided with a self-locking shaft shoulder (4011), a shear pin groove (4012), and a shear pin groove (4014). 02), a limit shoulder (403), a plurality of trapezoidal upper liquid inlets (4012) are arranged inside the head end, a deep tooth slip seat (405), a deep tooth slip sleeve mounting groove (406), a screw hole (404), a long rubber cylinder seat mounting platform (407), and a long rubber cylinder mounting platform (408) are arranged in the middle, a plurality of liquid inlet channels (4013) and a sealing groove (409) are arranged inside, a plurality of trapezoidal lower liquid outlet holes (4014) are arranged at the tail end, and a plurality of one-way valve mounting holes (4016) are arranged at the head and tail ends respectively. 01), the upper liquid inlet (4012), the deep tooth slip seat (405), the liquid inlet channel (4013), the sealing groove (409), and the lower liquid outlet (4014) are interconnected, and the head end thereof is connected to the continuous pipe insertion joint (2). The upper one-way valve plate (16), the reset spring I (17), the gasket (19), and the nut (18) are sequentially connected and assembled and installed inside the head end of the anchoring sealing seat (4). The deep tooth slip (5), the reset spring II (20), the deep tooth slip sleeve ( 6) After being assembled, the components are installed in the middle of the anchoring packing seat (4) by means of screws (7), the long rubber tube (9) is sleeved on the anchoring packing seat (4), the upper long rubber tube seat (8) and the lower long rubber tube seat (10) are fixed at both ends of the long rubber tube (9), the lower one-way valve plate (24), the return spring I (17), the gasket (19), and the nut (18) are sequentially connected and assembled and installed inside the end of the anchoring packing seat (4), and the rubber sealing ring II (21) is installed at the end of the deep tooth slip (5); The sliding core locking mechanism is composed of a sliding core cylinder I (22), a sliding core cylinder II (25), a locking connection (11), an inclined reset ring (26), a reset spring III (27), an outer cylinder (12), and a rubber sealing ring IV (28): the locking connection (11) is provided with a connecting thread I (1101) at the head end, a connecting boss (1102) in the middle, and a guiding self-locking inclined surface (1103) at the tail end, which is connected to the tail end of the anchor seal seat (4); the sliding core cylinder I (22) is provided with a pressure drop inclined surface (2201) inside the head end, a limiting boss (2202) at the front end, a liquid outlet (2204) and a sealing groove III (2203) at the tail end, and is installed on the anchor seal seat (4). Inside the spacer (4), the sliding core tube II (25) is sleeved in the locking connection (11), the inclined reset ring (26) is sleeved on the sliding core tube II (25), and the head end is in contact with the tail of the locking connection (11), the reset spring III (27) is sleeved on the sliding core tube II (25), and the head end is in contact with the inclined reset ring (26), the outer cylinder (12) is sleeved on the locking connection (11), the inclined reset ring (26), and the reset spring III (27), and the head end is connected to the middle of the locking connection (11), the rubber sealing ring III (23) is installed on the sliding core tube I (22), and the rubber sealing ring IV (28) is installed on the sliding core tube II (25); The jet injection head is composed of a jet injection head (13), an injection nozzle (14), and a sealing plug (29): the head end of the jet injection head (13) is provided with a connecting thread III (1301), and a plurality of groups of injection nozzle mounting holes (1303) are provided circumferentially in different axial sections, presenting a spiral arrangement, and a jet injection cavity (1302) is provided inside, which is connected to the tail end of the outer cylinder (12), the injection nozzle (14) is installed on the jet injection head (13), and the sealing plug (29) is installed at the tail of the jet injection head (13).

2. The high-efficiency jet injection tool for marine carbon dioxide storage according to claim 1, characterized in that: The head end of the continuous pipe insertion joint (2) is provided with a sealing groove I (201), the middle part is provided with a pin shearing groove (202), and the interior is provided with a truncated cone-shaped boss (203). The sealing groove I (201) is used to install a rubber sealing ring I (15), the pin shearing groove (103) is used to install a limit pin (3), and the truncated cone-shaped boss (104) is in contact with the head end of the anchoring seal seat (4).

3. The high-efficiency jet injection tool for marine carbon dioxide storage according to claim 1, characterized in that: The deep-toothed cava (5) is provided with a limiting groove (501) at the upper part, a reset spring installation groove (502) at the middle part, and a sealing groove II (503) at the lower part; the limiting groove (501) is in contact with the deep-toothed cava sleeve (6), the reset spring installation groove (502) is used to install the reset spring II (20), and the deep-toothed cava seat (405), the deep-toothed cava sleeve installation groove (406), and the screw hole (404) are respectively connected to the deep-toothed cava (5), the reset spring II (20), the deep-toothed cava sleeve (6), and the screw (7).

4. The high-efficiency jet injection tool for marine carbon dioxide storage according to claim 1, characterized in that: The lower long rubber tube seat (10) is provided with a transition arc surface (1003) at the front end, a limit mounting boss (1001) in the middle, and a mounting thread (1002) at the rear end, the transition arc surface (1003) is in contact with the outside of the long rubber tube (9), the limit mounting boss (1001) is in contact with the front end of the long rubber tube (9), and the mounting thread (1002) is connected to the anchoring sealing seat (4).

5. The high-efficiency jet injection tool for marine carbon dioxide storage according to claim 1, characterized in that: The connecting thread I (1101) at the head end of the locking connection (11) is connected to the anchoring isolation seat (4), the connecting boss (1102) is in contact with the outer cylinder (12), and the guiding self-locking inclined surface (1103) is in contact with the inclined surface reset ring (26); the front end of the outer cylinder (12) is provided with a connecting thread II (1201), the middle part is provided with a boss (1202), and the tail part is provided with a limiting connecting boss (1203), the connecting thread II (1201) is connected to the locking connection (11), the boss (1202) is in contact with the tail of the reset spring III (27), and the limiting connecting boss (1203) is connected to the injection head (13).

6. The high-efficiency jet injection tool for marine carbon dioxide storage according to claim 1, characterized in that: A sealing plug mounting platform (1304) is provided inside the end of the jet injection head (13), and the jet nozzle mounting hole (1303) is connected to the jet injection cavity (1302).

7. The high-efficiency jet injection tool for marine carbon dioxide storage according to claim 1, characterized in that: The upper one-way valve plate (16) is provided with a valve plate (1601) at the front end, a connecting screw (1602) in the middle, and a connecting thread IV (1603) at the rear end. The valve plate (1601) cooperates with the upper liquid inlet (4012), and the connecting screw (1602) passes through the one-way valve mounting hole (401) of the anchor seal seat (4) and is connected to the gasket (19) and the nut (18).

8. The high-efficiency jet injection tool for marine carbon dioxide storage according to claim 1, characterized in that: The front end of the sliding core cylinder II (25) is provided with a connecting thread V (2501) inside, the front end is provided with a limiting guide boss (2502) and a contact tooth (2503), and the middle part is provided with a guide groove (2504) and a sealing groove IV (2505).

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