Rapid hole sealing device for pre-injecting hydrogen sulfide absorption liquid
By employing a sealing technology combining a high-pressure injection tubing and an elastic capsule, the problem of substandard hydrogen sulfide absorption caused by borehole leakage was solved. This achieved efficient sealing of the borehole and effective neutralization of hydrogen sulfide, thereby reducing costs.
Patent Information
- Application Number
- CN202520579291.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-28
AI Technical Summary
In existing technologies, poor borehole sealing leads to substandard hydrogen sulfide absorption, especially in high-pressure pre-injection absorption liquid processes, where borehole leakage can easily cause incomplete fractures in the target coal seam.
A combination device consisting of a high-pressure injection tubing, a variable-pressure air injection device, primary and secondary elastic capsules, and a grouting pump is used to achieve efficient sealing of the borehole through high-pressure injection and variable-pressure air injection. The expansion and deformation of the elastic capsules make them in close contact with the inner wall of the borehole, and the grouting pump injects sealing material to complete the rapid sealing of the borehole.
It achieves efficient sealing of the borehole, improves the neutralization effect of the hydrogen sulfide absorbent, reduces costs, and the sealing material can be reused.
Smart Images
Figure CN223724574U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of mine gas prevention and control, and particularly relates to a rapid hole sealing device for pre-annulus hydrogen sulfide absorption liquid. BACKGROUND
[0002] During the process of coal mining, not only gas but also hydrogen sulfide gas is overflowed. Hydrogen sulfide is easily dissolved in water to form a weak acid, which corrodes the underground equipment of the coal mine and increases the maintenance cost of the equipment of the coal mine. In addition, hydrogen sulfide is toxic and extremely harmful to the human body. Therefore, the treatment of hydrogen sulfide in the coal mine is very important. At present, the prevention and control of hydrogen sulfide in the coal mine mainly includes three types. The first type is to remove hydrogen sulfide together with gas such as gas by measures such as extraction. However, this method has poor hydrogen sulfide extraction effect due to the strong adsorption capacity of coal to hydrogen sulfide and the low porosity of the coal body. The second type is to prevent hydrogen sulfide from contacting the human body by wearing related shielding objects such as a gas mask. This type of method mainly protects the health of personnel and has no protection for the equipment. It is generally used as an auxiliary measure for other hydrogen sulfide treatment methods. The third type is to neutralize hydrogen sulfide by using various reagents that can absorb or adsorb hydrogen sulfide to contact the hydrogen sulfide in the coal seam or overflowed from the coal seam.
[0003] Among them, the high-pressure pre-annulus absorption liquid process has high requirements for the sealing performance of the hole, and the air leakage of the hole can easily lead to incomplete development of the target coal seam fracture and substandard hydrogen sulfide absorption effect. CONTENT OF THE INVENTION
[0004] The present application provides a rapid hole sealing device for pre-annulus hydrogen sulfide absorption liquid. The device solves the problem of poor sealing performance of the hole, which can easily cause air leakage of the hole and lead to incomplete development of the target coal seam fracture and substandard hydrogen sulfide absorption effect when the reagent neutralizes hydrogen sulfide in the prior art. The device achieves the technical effect of efficiently sealing the hole, thereby making the hydrogen sulfide absorption liquid neutralize hydrogen sulfide better.
[0005] The utility model discloses an embodiment provides a kind of pre-annotated hydrogen sulfide absorption liquid quick hole sealing device, including high-pressure liquid injection pipe column, pressure injection device, primary elastic capsule, secondary elastic capsule and grouting pump;The high-pressure liquid injection pipe column is arranged in borehole;The primary elastic capsule and the secondary elastic capsule are sequentially spaced apart and arranged on the outside of the high-pressure liquid injection pipe column;Grouting cavity is arranged between the primary elastic capsule and the secondary elastic capsule;The pressure injection device and the grouting pump are all arranged on the outside of the borehole;The high-pressure liquid injection pipe column is provided with hydrogen sulfide absorption liquid at one end away from the pressure injection device;The pressure injection device is communicated with the primary elastic capsule and the secondary elastic capsule, and the pressure injection device is configured to inflate the primary elastic capsule and the secondary elastic capsule;The grouting pump is communicated with the grouting cavity, and it is configured to grout in the grouting cavity.
[0006] In a possible implementation manner, the device further includes a remote liquid injection platform and a pressure sensor; the remote liquid injection platform is electrically connected with the pressure sensor; and the pressure sensor is arranged in the hydrogen sulfide absorption liquid.
[0007] In a possible implementation manner, the device further includes a gas injection pipeline; the gas injection pipeline is arranged on the outside of the high-pressure liquid injection pipe column; and the pressure injection device is communicated with the primary elastic capsule and the secondary elastic capsule through the gas injection pipeline.
[0008] In a possible implementation manner, the device further includes a primary pressure monitoring valve and a secondary pressure monitoring valve; the primary pressure monitoring valve and the secondary pressure monitoring valve are spaced apart and arranged on the gas injection pipeline; the primary pressure monitoring valve is arranged in the primary elastic capsule; and the secondary pressure monitoring valve is arranged in the secondary elastic capsule.
[0009] In a possible implementation manner, the device further includes a grouting pipeline; the grouting pipeline is arranged on the outside of the high-pressure liquid injection pipe column; and the remote liquid injection platform is communicated with the grouting cavity through the grouting pipeline.
[0010] In a possible implementation manner, the device further includes a grouting pressure monitoring valve; the grouting pressure monitoring valve is arranged on the grouting pipeline.
[0011] In a possible implementation manner, the device further includes a wire; and the remote liquid injection platform is electrically connected with the pressure sensor through the wire.
[0012] One or more technical solutions provided in the application have at least the following technical effects:
[0013] The utility model discloses an embodiment adopts a kind of pre-annotated hydrogen sulfide absorption liquid quick hole sealing device, including high-pressure liquid injection pipe column, pressure injection device, primary elastic capsule, secondary elastic capsule and grouting pump;High-pressure liquid injection pipe column is arranged in borehole;Pressure injection device and grouting pump are all arranged on borehole outside, primary elastic capsule and secondary elastic capsule are sequentially spaced apart and arranged on the outside of high-pressure liquid injection pipe column, and located inside borehole;Primary elastic capsule and secondary elastic capsule are provided with grouting cavity;By high-pressure liquid injection pipe column, hydrogen sulfide absorption liquid is injected into borehole;By hydrogen sulfide absorption liquid, hydrogen sulfide in coal body can be absorbed;Pressure injection device is communicated with primary elastic capsule and secondary elastic capsule, and pressure injection device is configured to inflate primary elastic capsule and secondary elastic capsule;Grouting pump is communicated with grouting cavity, and it is configured to grout in grouting cavity;By pressure injection device, primary elastic capsule and secondary elastic capsule can be inflated, so that primary elastic capsule and secondary elastic capsule are inflated and deformed and tightly contact and seal with the inner wall of borehole;By grouting pump, sealing material is injected into grouting cavity, so that quick hole sealing can be completed.The present application solves the problem that, when reagent neutralizes hydrogen sulfide in the prior art, due to poor borehole sealing, borehole is easily leaked, which leads to incomplete overbreak of target coal seam, and causes hydrogen sulfide absorption effect to be substandard, realizes the technical effect that borehole is efficiently sealed, so that the effect that hydrogen sulfide absorption liquid neutralizes hydrogen sulfide is better, and the sealing material of the present application can be recycled, and cost is saved. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.
[0015] Figure 1 A schematic diagram of a pre-annotated hydrogen sulfide absorption liquid quick hole sealing device provided by the present application is shown.
[0016] Icon: 1-high pressure liquid injection pipe column;2-pressure injection device;3-primary elastic capsule;4-secondary elastic capsule;5-grouting pump;6-grouting cavity;7-hydrogen sulfide absorption liquid;8-remote liquid injection platform;9-pressure sensor;10-gas injection pipeline;11-primary pressure monitoring valve;12-secondary pressure monitoring valve;13-grouting pipeline;14-grouting pressure monitoring valve;15-wire. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.
[0018] In the description of the embodiments of the present application, it should be noted that the directions or position relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are the directions or position relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and thus cannot be understood as indicating or implying that the devices or elements referred to must have a particular direction, be constructed and operated in a particular direction, and thus cannot be understood as limiting the present application. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0019] The embodiment of the present application provides a kind of pre-annotated hydrogen sulfide absorption liquid quick hole sealing device, including high-pressure liquid injection pipe column 1, pressure injection device 2, primary elastic capsule 3, secondary elastic capsule 4 and grouting pump 5;High-pressure liquid injection pipe column 1 is arranged in borehole;Primary elastic capsule 3 and secondary elastic capsule 4 are sequentially arranged at the outside of high-pressure liquid injection pipe column 1 with interval;Primary elastic capsule 3 and secondary elastic capsule 4 are provided with grouting cavity 6;Pressure injection device 2 and grouting pump 5 are all arranged outside borehole;The end of high-pressure liquid injection pipe column 1 away from pressure injection device 2 is provided with hydrogen sulfide absorption liquid 7;Pressure injection device 2 is communicated with primary elastic capsule 3 and secondary elastic capsule 4, and pressure injection device 2 is configured to inflate primary elastic capsule 3 and secondary elastic capsule 4;Grouting pump 5 is communicated with grouting cavity 6, and it is configured to grout in grouting cavity 6.
[0020] For example, the pressure in primary elastic capsule 3 is P1, the pressure of sealing material injected into grouting cavity 6 is P2, the pressure in secondary elastic capsule 4 is P3, and the injection pressure of hydrogen sulfide absorption liquid 7 in borehole is P4. After adjustment by the device, P4>P1>P3>P2 is realized, so that the pressure of gas, slurry and liquid in the device can be accurately and efficiently controlled, so that the device always maintains balanced state of each pressure, thereby achieving good sealing effect in borehole.
[0021] For example, the injection pressure P4 of the hydrogen sulfide absorption liquid 7 is set to 18 MPa, the pressure PI of the first elastic capsule 3 is set to 15 MPa, the pressure P3 of the second elastic capsule 4 is set to 10 MPa, and the grouting pressure P2 is set to 8 MPa. Through the closed-loop feedback system of the pressure sensor 9, the working parameters of the gas injection device and the grouting pump 5 are dynamically adjusted to control the deviation of each pressure value within ±0.5 MPa.
[0022] For example, the first elastic capsule 3 and the second elastic capsule 4 adopt a three-layer composite structure, the inner layer is a 2 mm thick fluororubber sealing layer, the middle layer is an aramid fiber reinforced layer, and the outer layer is a 3 mm thick polyether ether ketone wear-resistant layer. The outer diameter of the expanded capsule can reach 1.2-1.5 times the diameter of the borehole, ensuring a tight fit with the borehole wall.
[0023] In the embodiment of the present application, as shown in Figure 1 , it further includes a remote injection platform 8 and a pressure sensor 9; the remote injection platform 8 is electrically connected with the pressure sensor 9; the pressure sensor 9 is arranged in the hydrogen sulfide absorption liquid 7, specifically, the sensor probe is immersed in the liquid surface below 10-15 cm.
[0024] For example, the pressure sensor 9 is connected to the remote display screen through the wire 15 to display the injection flow, pressure, time and other parameters.
[0025] For example, the pressure sensor 9 adopts a corrosion-resistant piezoelectric sensor, the measurement end of which is immersed in the hydrogen sulfide absorption liquid 7 below 10-15 cm of the liquid surface, real-time monitoring of the injection pressure value in the range of 5-8 MPa, and uploading the pressure data to the human-computer interface of the remote injection platform 8 through the RS485 bus, the operator can synchronously observe the dynamic change of the injection flow in the range of 0.5-1.2 m 3 / min and the cumulative injection time.
[0026] In the embodiment of the present application, as shown in Figure 1 , it further includes a gas injection pipeline 10; the gas injection pipeline 10 is arranged outside the high-pressure injection pipe column 1; the variable-pressure gas injection device 2 is in communication with the first elastic capsule 3 and the second elastic capsule 4 through the gas injection pipeline 10.
[0027] For example, the gas injection pipeline 10 adopts a double-layer stainless steel braided hose, the outer layer is provided with a polyurethane protective layer with a pressure resistance of 30 MPa, and the inner layer has a pipe diameter of Φ8 mm, which is connected with the nitrogen cylinder group of the variable-pressure gas injection device 2 through a quick connector, and can respectively deliver 12-15 MPa of nitrogen to the first elastic capsule 3 and 8-10 MPa of nitrogen to the second elastic capsule 4.
[0028] In the embodiment of the present application, as shown in Figure 1As shown in the figure, the first pressure monitoring valve 11 and the second pressure monitoring valve 12 are arranged on the gas injection pipeline 10 at intervals; the first pressure monitoring valve 11 is arranged in the first elastic capsule 3; and the second pressure monitoring valve 12 is arranged in the second elastic capsule 4.
[0029] For example, the first pressure monitoring valve 11 is configured with a digital pressure gauge with a precision of 0.5, and a detection probe of the digital pressure gauge is embedded in a polyurethane inner lining of the first elastic capsule 3, so that when the pressure in the capsule is lower than a set threshold value 11MPa, an air supplement mechanism is automatically triggered; and the second pressure monitoring valve 12 adopts a mechanical safety valve structure, so that when the pressure of the second elastic capsule 4 exceeds 12MPa, pressure relief is automatically performed.
[0030] In the embodiment of the application, as shown in the figure, Figure 1 The grouting pipeline 13 is arranged outside the high-pressure liquid injection pipe column 1; and the remote liquid injection platform 8 is communicated with the grouting cavity 6 through the grouting pipeline 13.
[0031] In the embodiment of the application, as shown in the figure, Figure 1 The grouting pressure monitoring valve 14 is arranged on the grouting pipeline 13.
[0032] For example, the grouting pressure monitoring valve 14 is integrated with a pressure balance module, so that when the pressure P2 of the grouting cavity 6 exceeds 1.2 times of the pressure P3 of the adjacent second elastic capsule 4, the output power of the grouting pump 5 is automatically adjusted, so that the pressure gradient relationship of P3>P2 is ensured.
[0033] In the embodiment of the application, as shown in the figure, Figure 1 The pressure sensor 9 is electrically connected with the remote liquid injection platform 8 through the wire 15.
[0034] For example, the wire 15 adopts an armored explosion-proof cable, and a core wire of the armored explosion-proof cable includes four groups of independent shielded twisted pairs, which respectively transmit a 4-20mA analog signal of the pressure sensor 9, capsule pressure data, a valve state signal and a grouting flow digital signal.
[0035] The operation steps of the hydrogen sulfide absorption liquid pre-injection rapid hole sealing device are as follows:
[0036] Before injecting liquid, compressed gas is injected into the first elastic capsule 3 and the second elastic capsule 4 through the gas injection pipeline 10, and the first elastic capsule 3 and the second elastic capsule 4 are tightly contacted with the borehole and sealed after expansion and deformation, and a grouting cavity 6 for injecting sealing material is formed between the first elastic capsule 3 and the second elastic capsule 4, the sealing material is injected into the grouting cavity 6 through the grouting pump 5, and thus the rapid sealing is completed. After the liquid injection is completed, the gas source of the variable-pressure gas injection device 2 is closed, the independent pressure relief valve on the gas injection pipeline 10 is opened, the pressure of the capsules is slowly released, and after the pressure is reduced, the high-pressure liquid injection string 1 can be pulled out of the borehole, and the high-pressure liquid injection string 1, the pressure sensor 9, the first elastic capsule 3 and the second elastic capsule 4 and other materials can be reused.
[0037] For example, after the liquid injection is completed, the pressure relief valve of the gas injection pipeline 10 is opened to gradually release the pressure of the capsules at a rate of 0.5 MPa / min, when the value displayed by the pressure sensor 9 is lower than 2 MPa, the high-pressure liquid injection string 1 is pulled back at a speed of 10-15 cm / min through the hydraulic pushing device, and the ceramic coating arranged on the surface of the string can reduce the friction coefficient between the string and the solidified sealing material to below 0.3.
[0038] The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment mainly describes the difference from other embodiments.
[0039] The above examples are only used to illustrate the technical solutions of the present application, and are not limited to the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.
Claims
1. A pre-primed hydrogen sulfide absorbing liquid quick sealing device, characterized in that, The high-pressure liquid injection pipe column (1), the variable-pressure gas injection device (2), the first-stage elastic capsule (3), the second-stage elastic capsule (4), and the grouting pump (5) are included. The high-pressure liquid injection pipe column (1) is arranged in the borehole. The first-stage elastic capsule (3) and the second-stage elastic capsule (4) are arranged in sequence and at intervals on the outside of the high-pressure liquid injection pipe column (1). A grouting cavity (6) is arranged between the first-stage elastic capsule (3) and the second-stage elastic capsule (4). The variable-pressure gas injection device (2) and the grouting pump (5) are both arranged on the outside of the borehole. A hydrogen sulfide absorption liquid (7) is arranged at the end of the high-pressure liquid injection pipe column (1) away from the variable-pressure gas injection device (2). The variable-pressure gas injection device (2) is in communication with the first-stage elastic capsule (3) and the second-stage elastic capsule (4), and is configured to inflate the first-stage elastic capsule (3) and the second-stage elastic capsule (4). The grouting pump (5) is in communication with the grouting cavity (6) and is configured to inject grout into the grouting cavity (6).
2. The device for quickly sealing the pre-injection hydrogen sulfide absorption liquid hole according to claim 1, characterized in that, A remote liquid injection platform (8) and a pressure sensor (9) are further included. The remote liquid injection platform (8) is electrically connected with the pressure sensor (9). The pressure sensor (9) is arranged in the hydrogen sulfide absorption liquid (7).
3. The device for quickly sealing the pre-injection hydrogen sulfide absorption liquid hole according to claim 1, characterized in that, A gas injection pipeline (10) is further included. The gas injection pipeline (10) is arranged on the outside of the high-pressure liquid injection pipe column (1). The variable-pressure gas injection device (2) is in communication with the first-stage elastic capsule (3) and the second-stage elastic capsule (4) through the gas injection pipeline (10).
4. The pre-primed hydrogen sulfide absorbing liquid quick sealing device according to claim 3, characterized in that, A first-stage pressure monitoring valve (11) and a second-stage pressure monitoring valve (12) are further included. The first-stage pressure monitoring valve (11) and the second-stage pressure monitoring valve (12) are arranged in sequence and at intervals on the gas injection pipeline (10). The first-stage pressure monitoring valve (11) is arranged in the first-stage elastic capsule (3). The second-stage pressure monitoring valve (12) is arranged in the second-stage elastic capsule (4).
5. The pre-primed hydrogen sulfide absorbing fluid quick sealing device according to claim 2, characterized in that, A grouting pipeline (13) is further included. The grouting pipeline (13) is arranged on the outside of the high-pressure liquid injection pipe column (1). The remote liquid injection platform (8) is in communication with the grouting cavity (6) through the grouting pipeline (13).
6. The pre-charge hydrogen sulfide absorbing liquid quick sealing device according to claim 5, characterized in that, A grouting pressure monitoring valve (14) is further included. The grouting pressure monitoring valve (14) is arranged on the grouting pipeline (13).
7. The device for quickly sealing the pre-injection hydrogen sulfide absorption liquid hole according to claim 2, characterized in that, A wire (15) is further included. The remote liquid injection platform (8) is electrically connected with the pressure sensor (9) through the wire (15).