A new material for liquid oxygen expansion-induced fracturing

Abstract

The utility model discloses a liquid oxygen expansion fracturing novel material, including fracturing pipe, and fracturing pipe includes inner tube body and outer tube body, and inner tube body and outer tube body sealed sliding fit, and can drive inner tube body relative outer tube body sealed sliding through adjusting assembly, to change the overall length of fracturing pipe, and the both ends of fracturing pipe are equipped with connecting assembly, and the series use of multiple fracturing pipes can be realized through connecting assembly, the utility model adjusts the length of fracturing pipe according to the actual depth of fracturing hole flexibly, avoids the situation that the overall is too long or too short after series connection, reduces the probability that fracturing pipe is jammed in the hole, reduces the installation difficulty, is convenient for taking out after fracturing simultaneously, guarantees the follow -up construction progress, prevents fracturing pipe from shaking in the hole, ensures liquid oxygen expansion fracturing effect, makes rock broken even, improves construction efficiency, avoids fracturing pipe connecting part loosening due to shaking, eliminates the potential safety hazard, improves construction safety.

Description

Technical Field

[0001] This utility model relates to the field of liquid oxygen-induced cracking technology, specifically to a novel liquid oxygen expansion-induced cracking material. Background Technology

[0002] Liquid oxygen expansion fracturing technology, as an efficient and environmentally friendly method of rock breaking, has been widely used in many fields such as mining and urban construction. This technology mainly uses the rapid vaporization and expansion of liquid oxygen in the fracturing tube to generate high-pressure impact, thereby causing the rock to fracture.

[0003] In existing technologies, to accommodate fracturing holes of different depths, fracturing tubes of fixed length are typically connected in series. However, in actual construction, the depth of the fracturing holes varies, which brings many problems to the use of the fracturing tubes. When the overall length of the series-connected fracturing tubes is too long, they may become stuck inside the fracturing hole, increasing installation difficulty and potentially making them difficult to remove after fracturing, affecting subsequent construction progress, and even causing equipment damage and material waste. If the overall length of the series-connected fracturing tubes is too short, they will sway inside the hole, affecting the effect of liquid oxygen expansion fracturing, resulting in uneven rock fragmentation and reduced construction efficiency. At the same time, swaying may also cause the connection parts of the fracturing tubes to loosen, posing a safety hazard. Therefore, it is necessary to design a new liquid oxygen expansion fracturing material to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a novel liquid oxygen expansion-induced cracking material to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel liquid oxygen expansion fracturing material, comprising a fracturing tube, wherein the fracturing tube includes an inner tube body and an outer tube body, the inner tube body and the outer tube body are in a sealed sliding fit, and the inner tube body can be driven to slide relative to the outer tube body in a sealed manner through an adjustment component to change the overall length of the fracturing tube, and the two ends of the fracturing tube are provided with connecting components, through which multiple fracturing tubes can be used in series.

[0006] Preferably, the adjusting assembly includes a limiting plate, a screw, and a limiting rod. The limiting plate is installed on the inner wall of the inner tube facing the outer tube. The limiting plate is penetrated by a set of symmetrically arranged screws and limiting rods. The screws are threadedly connected to the limiting plate. The other end of the screw penetrates the outer tube and is rotatably and sealingly connected to it. The other end of the limiting rod is fixedly connected to the inner side of the outer tube.

[0007] Preferably, a set of sealing elements is embedded in the outer wall of the inner tube body facing the outer tube body, and the inner tube body can be inserted into the outer tube body, and the sealing elements cooperate to form a sliding seal.

[0008] Preferably, the connecting assembly includes a first connector installed at one end of the inner tube and a second connector installed at one end of the outer tube, wherein the first connector and the second connector are threadedly engaged.

[0009] Preferably, the first connector extends into the inner cavity of the inner tube and has two sets of first through holes symmetrically provided at one end. A set of springs is installed in the inner cavity of the first connector, and the other end of the springs is connected to a set of pistons that are in a sealing and sliding fit with the inner cavity of the first connector. A set of second through holes is provided through the pistons.

[0010] Preferably, the spring force can push the piston to move, releasing the blockage of the first through hole, so that the first through hole communicates with the inner cavity of the inner tube, the inner cavity of the first connector and the second through hole, thereby achieving air release.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model allows for flexible adjustment of the fracturing tube length based on the actual depth of the fracturing hole, avoiding situations where the entire tube is too long or too short after being connected in series. This reduces the probability of the fracturing tube getting stuck in the hole, lowers the installation difficulty, and facilitates removal after fracturing, ensuring subsequent construction progress. It also prevents the fracturing tube from shaking in the hole, ensuring the liquid oxygen expansion fracturing effect, making the rock breakage uniform, improving construction efficiency, avoiding loosening of the fracturing tube connection due to shaking, eliminating safety hazards, and improving construction safety.

[0013] 2. This utility model, through the threaded engagement of the screw and the limiting plate, can precisely control the sliding distance of the inner tube relative to the outer tube, achieving precise adjustment of the fracturing tube length and better adapting to the fracturing hole depth error. The guiding and limiting function of the limiting rod prevents the inner tube from shifting or shaking during sliding, ensuring stability during the adjustment process and thus ensuring the stability of the fracturing tube in the hole. The sealing element achieves reliable sliding sealing, preventing liquid oxygen leakage during adjustment and fracturing, ensuring construction safety, and simultaneously ensuring stable liquid oxygen expansion pressure, thereby improving the fracturing effect.

[0014] 3. The first and second connecting parts of this utility model are connected by a threaded connection, which is firm and facilitates the rapid series installation of multiple fracturing tubes. When connected in series, the spring pushes the piston to release the seal on the first through hole, realizing the interconnection of the inner cavities of each set of fracturing tubes, ensuring that liquid oxygen can flow smoothly in the series of fracturing tubes and ensuring the fracturing effect. When used in a single set, the fracturing tube itself pushes the piston to close the first through hole, realizing one-end sealing, and then uses the valve connected to the other end for gas filling. The operation is simple and can effectively prevent liquid oxygen leakage. In case of explosion failure, the fracturing tube is pulled to make the spring push the piston to release the seal, realizing rapid gas release, reducing safety risks, and facilitating subsequent handling. Attached Figure Description

[0015] Figure 1 This is a cross-sectional schematic diagram of a single-unit fracturing tube of this utility model;

[0016] Figure 2 This utility model Figure 1 Enlarged view of point A;

[0017] Figure 3 This is a cross-sectional schematic diagram of two sets of fracturing tubes connected in series according to this utility model;

[0018] Figure 4 This utility model Figure 3 Enlarged view of point B;

[0019] Figure 5 This is a schematic diagram of the overall structure of this utility model on the right side;

[0020] Figure 6 This is a schematic diagram of the overall structure of this utility model from the left side.

[0021] In the diagram: 1. Inner tube; 2. Outer tube; 3. Limiting plate; 4. Screw; 5. Limiting rod; 6. Seal; 7. First connector; 8. Second connector; 9. First through hole; 10. Spring; 11. Piston; 12. Second through hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Please refer to Figure 1-6 As shown, this utility model provides a novel liquid oxygen expansion fracturing material, including a fracturing tube. The fracturing tube includes an inner tube body 1 and an outer tube body 2. The inner tube body 1 and the outer tube body 2 are sealed and slidably fitted. The inner tube body 1 can be driven to slide relative to the outer tube body 2 through an adjustment component to change the overall length of the fracturing tube. The two ends of the fracturing tube are provided with connecting components, and multiple fracturing tubes can be used in series through the connecting components.

[0025] The fracturing tube consists of an inner tube 1 and an outer tube 2, which form a sealed sliding fit structure. The adjustment component plays a driving role, which can drive the inner tube 1 to slide relative to the outer tube 2 in a sealed manner, thereby changing the overall length of the fracturing tube to adapt to fracturing holes of different depths. When multiple fracturing tubes need to be used together, they can be connected in series through the connecting components at both ends of the fracturing tubes to meet the length requirements of different construction scenarios.

[0026] The length of the fracturing tube can be flexibly adjusted according to the actual depth of the fracturing hole, avoiding the situation where the overall length is too long or too short after being connected in series. This reduces the probability of the fracturing tube getting stuck in the hole, lowers the installation difficulty, and facilitates its removal after fracturing, ensuring the progress of subsequent construction. It also prevents the fracturing tube from shaking in the hole, ensuring the effect of liquid oxygen expansion fracturing, making the rock break up evenly, improving construction efficiency, avoiding loosening of the fracturing tube connection due to shaking, eliminating safety hazards, and improving construction safety.

[0027] Specifically, the adjustment assembly includes a limiting plate 3, a screw 4, and a limiting rod 5. The limiting plate 3 is installed on the inner wall of the inner tube 1 facing the outer tube 2. The limiting plate 3 is penetrated by a set of symmetrically arranged screws 4 and limiting rods 5, and the screws 4 are threadedly connected to the limiting plate 3. The other end of the screws 4 penetrates the outer tube 2 and is rotatably connected to it in a sealed manner. The other end of the limiting rod 5 is fixedly connected to the inner side of the outer tube 2. A set of sealing elements 6 is embedded in the outer wall of the inner tube 1 facing the outer tube 2. The inner tube 1 can be inserted into the outer tube 2 and forms a sliding seal with the sealing elements 6.

[0028] The screw 4 is threadedly connected to the limiting plate 3, and its other end penetrates the outer tube 2 and is rotatably connected to it in a sealed manner. When the screw 4 is rotated, the limiting plate 3 will move axially along the screw 4. The other end of the limiting rod 5 is fixedly connected to the inner side of the outer tube 2, which guides and limits the movement of the limiting plate 3, ensuring that the inner tube 1 slides stably. The outer wall of the inner tube 1 facing the outer tube 2 is embedded with the sealing element 6. When the inner tube 1 is inserted into the outer tube 2, the sealing element 6 ensures the sliding seal between the two to prevent liquid oxygen leakage.

[0029] The threaded engagement between the screw 4 and the limiting plate 3 allows for precise control of the sliding distance between the inner tube 1 and the outer tube 2, enabling accurate adjustment of the fracturing tube length and better adaptation to fracturing hole depth errors. The guiding and limiting function of the limiting rod 5 prevents the inner tube 1 from shifting or shaking during sliding, ensuring stability during the adjustment process and thus ensuring the stability of the fracturing tube within the hole. The sealing element 6 provides a reliable sliding seal, preventing liquid oxygen leakage during adjustment and fracturing, ensuring construction safety, and simultaneously ensuring stable liquid oxygen expansion pressure to improve fracturing effect.

[0030] The connecting assembly includes a first connector 7 installed at one end of the inner tube 1 and a second connector 8 installed at one end of the outer tube 2. The first connector 7 and the second connector 8 are threaded together. The first connector 7 extends into the inner cavity of the inner tube 1 and has two sets of first through holes 9 symmetrically opened at one end. A set of springs 10 is installed in the inner cavity of the first connector 7. The other end of the springs 10 is connected to a set of pistons 11 that are in a sealing and sliding fit with the inner cavity of the first connector 7. A set of second through holes 12 is opened through the pistons 11. The elastic force of the springs 10 can push the pistons 11 to move, release the closure of the first through holes 9, and make the first through holes 9 communicate with the inner cavity of the inner tube 1, the inner cavity of the first connector 7 and the second through holes 12, so as to realize the venting.

[0031] When used in series: the first connecting piece 7 of the inner tube 1 of the upper set of fracturing tubes is connected to the second connecting piece 8 of the outer tube 2 of the lower set of fracturing tubes by threaded connection. At this time, the spring 10 is not limited and will push the piston 11 to move in the inner cavity of the first connecting piece 7, release the closure of the first through hole 9, so that the first through hole 9 is interconnected with the inner cavity of the inner tube 1, the inner cavity of the first connecting piece 7 and the second through hole 12, so as to realize the interconnection of the inner cavities of the two sets of fracturing tubes.

[0032] When used as a single unit: Insert one end of the first connector 7 of the fracturing tube into the hole. Under the action of gravity of the fracturing tube, the piston 11 will be pushed to overcome the elastic force of the spring 10 and move in the inner cavity of the first connector 7, so as to seal the first through hole 9 and achieve the sealing of this end. The second connector 8 at the other end can be connected to the valve of the prior art for inflation.

[0033] When the explosion fails: Pulling the rupture tube outward will cause the spring 10 to lose its restraint and push the piston 11 to move, releasing the blockage of the first through hole 9, so that the first through hole 9 can communicate with the inner cavity of the inner tube 1, the inner cavity of the first connecting piece 7 and the second through hole 12, thereby venting the gas.

[0034] The first connector 7 and the second connector 8 are connected by a threaded connection, which is firm and facilitates the rapid series installation of multiple fracturing tubes. When connected in series, the spring 10 pushes the piston 11 to release the seal on the first through hole 9, realizing the interconnection of the inner cavities of each set of fracturing tubes, ensuring that liquid oxygen can flow smoothly in the series of fracturing tubes and ensuring the fracturing effect. When used in a single set, the fracturing tube itself uses its own weight to push the piston 11 to seal the first through hole 9, achieving a seal at one end. It is then used with the valve connected to the other end for inflation. The operation is simple and can effectively prevent liquid oxygen leakage. In case of a failed explosion, the spring 10 is pushed by pulling the fracturing tube to release the seal on the piston 11, achieving rapid gas release, reducing safety risks, and facilitating subsequent handling.

[0035] Working principle: The screw 4 is threadedly connected to the limiting plate 3, and its other end penetrates the outer tube 2 and is rotatably connected to it in a sealed manner. When the screw 4 is rotated, it will drive the limiting plate 3 to move axially along the screw 4. The other end of the limiting rod 5 is fixedly connected to the inner side of the outer tube 2, which guides and limits the movement of the limiting plate 3, ensuring the stable sliding of the inner tube 1. The outer wall of the inner tube 1 facing the outer tube 2 is embedded with the sealing element 6. When the inner tube 1 is inserted into the outer tube 2, the sealing element 6 ensures the sliding seal between the two to prevent liquid oxygen leakage. When used in series: the first connecting piece 7 of the inner tube 1 of the previous set of fracturing tubes is connected to the second connecting piece 8 of the outer tube 2 of the next set of fracturing tubes through threaded engagement. At this time, the spring 10 is not limited and will push the piston 11 to move in the inner cavity of the first connecting piece 7, releasing the constraint. The closure of the first through hole 9 allows communication between the first through hole 9 and the inner cavity of the inner tube body 1, the inner cavity of the first connector 7, and the second through hole 12, thus enabling communication between the inner cavities of the two sets of fracturing tubes. When using a single set: insert one end of the first connector 7 of the fracturing tube into the hole. Under the gravity of the fracturing tube, the piston 11 will be pushed to overcome the elastic force of the spring 10 and move within the inner cavity of the first connector 7, thereby sealing the first through hole 9 and achieving a seal at that end. The second connector 8 at the other end can be connected to a valve of the prior art for inflation. In case of a failed explosion: pull the fracturing tube outward, and the spring 10 will lose its restraint, pushing the piston 11 to move and release the closure of the first through hole 9, allowing communication between the first through hole 9 and the inner cavity of the inner tube body 1, the inner cavity of the first connector 7, and the second through hole 12, thus achieving gas release.

[0036] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel liquid oxygen expansion-induced fracturing material, comprising a fracturing tube, characterized in that: The fracturing tube includes an inner tube (1) and an outer tube (2). The inner tube (1) and the outer tube (2) are sealed and slidably fitted together. The inner tube (1) can be driven to slide relative to the outer tube (2) through an adjustment component to change the overall length of the fracturing tube. The two ends of the fracturing tube are provided with connecting components, and multiple fracturing tubes can be used in series through the connecting components.

2. The novel liquid oxygen expansion-induced cracking material according to claim 1, characterized in that: The adjustment assembly includes a limiting plate (3), a screw (4), and a limiting rod (5). The limiting plate (3) is installed on the inner wall of the inner tube (1) facing the outer tube (2). The limiting plate (3) is penetrated by a set of symmetrically arranged screws (4) and limiting rods (5). The screws (4) are threadedly connected to the limiting plate (3). The other end of the screws (4) penetrates the outer tube (2) and is rotatably and sealed thereto. The other end of the limiting rods (5) is fixedly connected to the inner side of the outer tube (2).

3. The novel liquid oxygen expansion-induced cracking material according to claim 2, characterized in that: A set of sealing elements (6) is embedded in the outer wall of the inner tube (1) facing the outer tube (2). The inner tube (1) can be inserted into the outer tube (2) and forms a sliding seal with the sealing elements (6).

4. The novel liquid oxygen expansion-induced cracking material according to claim 1, characterized in that: The connecting assembly includes a first connector (7) installed at one end of the inner tube (1) and a second connector (8) installed at one end of the outer tube (2), wherein the first connector (7) and the second connector (8) are threadedly connected.

5. The novel liquid oxygen expansion-induced cracking material according to claim 4, characterized in that: The first connector (7) extends to one end of the inner cavity of the inner tube (1) and is symmetrically provided with two sets of first through holes (9). A set of springs (10) is installed in the inner cavity of the first connector (7). The other end of the springs (10) is connected to a set of pistons (11) that are in sealing and sliding cooperation with the inner cavity of the first connector (7). The pistons (11) are provided with a set of second through holes (12).

6. The novel liquid oxygen expansion-induced cracking material according to claim 5, characterized in that: The elastic force of the spring (10) can push the piston (11) to move, release the closure of the first through hole (9), and make the first through hole (9) communicate with the inner cavity of the inner tube (1), the inner cavity of the first connector (7) and the second through hole (12) to achieve air release.

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