A regional fracturing segmented water pressure monitoring device

Abstract

The present disclosure proposes a regional fracturing segmented water pressure monitoring device, comprising: a shell, the shell is arranged in the isolation string of the rock formation borehole; a collection module, the collection module is arranged in the shell, and the collection end of the collection module extends outside the shell; a monitoring module, the monitoring module is arranged in the shell, and the first communication end of the monitoring module is connected to the communication end of the collection module, and the monitoring module is used to control the collection module to collect the pressure greater than the preset pressure value in the borehole according to a preset frequency value; a power storage module, the power storage module is arranged in the shell, and the power supply end of the power storage module is connected to the power supply end of the monitoring module. In a regional fracturing segmented water pressure monitoring device disclosed in the present disclosure, direct and continuous monitoring of the pressure in the isolation string of the borehole can be achieved, thereby avoiding the error problem caused by indirect measurement, and then accurately and comprehensively measuring the whole process data such as the rock rupture pressure and rock formation expansion pressure of each fracturing segment in the borehole.

Description

Technical Field

[0001] The present invention relates to the technical field of underground coal mine pressure control and monitoring technology, and in particular to a regional fracturing segmented water pressure monitoring device. Background Art

[0002] Modern hydraulic fracturing technology has been widely used in various types of ground oil and gas wells, including shale oil and gas wells, coalbed methane wells and conventional oil and gas wells. By creating and expanding cracks in low-permeability rocks, hydraulic fracturing has greatly increased the production of oil and natural gas. The successful implementation of this technology has not only promoted the shale gas energy revolution, but also changed the pattern of the energy market.

[0003] The underground regional fracturing technology in coal mines, which draws on the ground fracturing technology, is a new technical method that can effectively reduce the strong manifestation of mine pressure at the working face, prevent and control the impact disasters of thick and hard coal seams in advance, and control the large deformation and damage of weak tunnels. It has been rapidly promoted and applied in the field of underground coal mining.

[0004] However, at present, the continuous fluid pressure value of hydraulic fracturing in mines is only measured by installing pressure sensors at the fracturing pump station or installing instruments on the pipeline outside the borehole to roughly estimate the rock fracture pressure. It is still difficult to accurately and comprehensively measure the whole process data such as the rock fracture pressure and rock expansion pressure of each fracturing segment in the borehole. Summary of the invention

[0005] The present disclosure aims to solve one of the technical problems in the related art at least to some extent.

[0006] To this end, an object of the present disclosure is to provide a regional fracturing stage water pressure monitoring device.

[0007] To achieve the above-mentioned purpose, the present disclosure provides a regional fracturing segmented water pressure monitoring device, comprising: a shell, the shell is arranged in a sealing string of a rock formation borehole; a collection module, the collection module is arranged in the shell, and the collection end of the collection module extends outside the shell; a monitoring module, the monitoring module is arranged in the shell, and the first communication end of the monitoring module is connected to the communication end of the collection module, and the monitoring module is used to control the collection module to collect the pressure in the borehole greater than the preset pressure value according to a preset frequency value; a power storage module, the power storage module is arranged in the shell, and the power supply end of the power storage module is connected to the power supply end of the monitoring module.

[0008] Optionally, the shell includes: a tube body, which is arranged in the drill hole and has a diameter smaller than the diameter of the drill hole; a first end cover, which is a removable sealing cover fitted on one end of the tube body; and a second end cover, which is a removable sealing cover fitted on an end of the tube body away from the first end cover; wherein the collection module, the monitoring module and the power storage module are sequentially arranged in the tube body along the direction from the first end cover to the second end cover, and the collection end of the collection module extends outside the first end cover.

[0009] Optionally, the outer shell also includes: a first protruding tube, which is arranged on a side of the first end cover close to the second end cover, and the outer surface of the first protruding tube is threadedly connected to the inner surface of the end of the tube body away from the second end cover; and / or, a second protruding tube, which is arranged on a side of the second end cover close to the first end cover, and the outer surface of the second protruding tube is threadedly connected to the inner surface of the end of the tube body away from the first end cover.

[0010] Optionally, the outer shell also includes: at least one first sealing ring, the outer surface of the first protruding tube is provided with at least one first annular groove, the first sealing ring is sleeved in the first annular groove, and the first sealing ring abuts against the inner surface of the tube body; and / or, at least one second sealing ring, the outer surface of the second protruding tube is provided with at least one second annular groove, the second sealing ring is sleeved in the second annular groove, and the second sealing ring abuts against the inner surface of the tube body.

[0011] Optionally, the device further includes: an aviation plug, which is arranged in the tube body and located at one end of the power storage module close to the second end cover, and the communication end of the aviation plug is connected to the second communication end of the monitoring module.

[0012] Optionally, the device also includes: a first positioning ring, which is sleeved on one end of the outer shell close to the collection end of the collection module, and the first positioning ring is clamped on one end inside the isolation pipe string; and / or, a second positioning ring, which is sleeved on one end of the outer shell away from the first positioning ring, and the second positioning ring is clamped on one end inside the isolation pipe string away from the first positioning ring.

[0013] Optionally, a plurality of protrusions are arranged on the outer circumferential surface of the first positioning ring at intervals along the circumference of the first positioning ring, and one end of the protrusion away from the first positioning ring abuts against the inner surface of the isolation column, forming a first flow channel between adjacent protrusions.

[0014] Optionally, the outer circumferential surface of the second positioning ring abuts against the inner surface of the isolation pipe column, and the second positioning ring is provided with a plurality of second flow channels at intervals along the circumference of the first positioning ring; wherein a third annular groove is provided on the outer circumferential surface of the second positioning ring, and a third sealing ring is sleeved in the third annular groove, and the third sealing ring abuts against the inner surface of the isolation pipe column.

[0015] Optionally, the monitoring module includes: a differential operational amplifier unit, which is arranged in the shell, and the first communication end of the differential operational amplifier unit is connected to the communication end of the acquisition module; a processing unit, which is arranged in the shell, and the first communication end of the processing unit is connected to the second communication end of the differential operational amplifier unit; a data storage unit, which is arranged in the shell, and the communication end of the data storage unit is connected to the second communication end of the processing unit; a setting storage unit, which is arranged in the shell, and the communication end of the setting storage unit is connected to the third communication end of the processing unit; a clock unit, which is arranged in the shell, and the communication end of the clock unit is connected to the fourth communication end of the processing unit; a serial communication unit, which is arranged in the shell, and the communication end of the serial communication unit is connected to the fifth communication end of the processing unit.

[0016] The power storage module includes: a lithium battery, which is arranged in the shell; a protection circuit, which is arranged in the shell, and the power supply end of the protection circuit is connected to the power supply end of the lithium battery; a switching power supply, which is arranged in the shell, and the power supply end of the switching power supply is connected to the power supply end of the protection circuit; a voltage stabilizer, which is arranged in the shell, and the power supply end of the voltage stabilizer is connected to the power supply end of the switching power supply, and the power supply end of the voltage stabilizer is connected to the power supply end of the monitoring module.

[0017] The technical solution provided by the present disclosure may have the following beneficial effects:

[0018] Through the integrated arrangement of the acquisition module, the monitoring module and the power storage module in the outer shell, and the cooperation among the acquisition module, the monitoring module and the power storage module, direct and continuous monitoring of the pressure in the borehole isolation string can be achieved, thereby avoiding the error problem caused by indirect measurement, and then accurately and comprehensively measuring the whole process data such as the rock fracture pressure and rock expansion pressure of each fracturing segment in the borehole.

[0019] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0021] Figure 1 It is a cross-sectional schematic diagram of a regional fracturing staged water pressure monitoring device proposed in an embodiment of the present disclosure;

[0022] Figure 2 It is a circuit diagram of a monitoring module in a regional fracturing staged water pressure monitoring device proposed in an embodiment of the present disclosure;

[0023] Figure 3 It is a circuit diagram of a power storage module in a regional fracturing staged water pressure monitoring device proposed in an embodiment of the present disclosure;

[0024] As shown in the figure: 1, outer shell, 11, tube body, 12, first end cover, 13, second end cover, 14, first protruding tube, 15, second protruding tube, 16, first sealing ring, 17, second sealing ring;

[0025] 2. Collection module;

[0026] 3. Monitoring module, 31. Differential operational amplifier unit, 32. Processing unit, 33. Data storage unit, 34. Setting storage unit, 35. Clock unit, 36. Serial communication unit;

[0027] 4. Power storage module, 41. Lithium battery, 42. Protection circuit, 43. Switching power supply, 44. Voltage stabilizer;

[0028] 5. Aviation plug, 6. First positioning ring, 7. Second positioning ring, 8. First flow channel, 9. Second flow channel, 10. Third sealing ring. DETAILED DESCRIPTION

[0029] Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and are not to be construed as limitations of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications, and equivalents that fall within the spirit and connotation of the appended claims.

[0030] like Figure 1As shown, the embodiment of the present disclosure proposes a regional fracturing segmented water pressure monitoring device, including: a shell 1, a collection module 2, a monitoring module 3 and a power storage module 4, the shell 1 is arranged in a sealing string of a rock formation borehole, the collection module 2 is arranged in the shell 1, and the collection end of the collection module 2 extends outside the shell, the monitoring module 3 is arranged in the shell 1, and the first communication end of the monitoring module 3 is connected to the communication end of the collection module 2, the monitoring module 3 is used to control the collection module 2 to collect a pressure greater than a preset pressure value in the borehole according to a preset frequency value, and the power storage module 4 is arranged in the shell 1, and the power supply end of the power storage module 4 is connected to the power supply end of the monitoring module 3.

[0031] It can be understood that, since the outer shell 1 is arranged in the isolation string of the rock formation borehole, and the collection module 2 is arranged in the outer shell 1, the collection end of the collection module 2 extends outside the outer shell, so that the collection module 2 can be arranged in the isolation string of the borehole using the outer shell 1, and can directly collect the pressure in the borehole; and, since the monitoring module 3 is arranged in the outer shell 1, and the first communication end of the monitoring module 3 is connected to the communication end of the collection module 2, the monitoring module 3 can be integrated in the isolation string of the borehole using the outer shell 1 and the collection module 2, and at the same time, the pressure collection of the collection module 2 can also be used to realize the pressure monitoring in the borehole; in addition, since the power storage module 4 is arranged in the outer shell 1, and the power supply end of the power storage module 4 is connected to the power supply end of the monitoring module 3, the power storage module 4 can be integrated in the isolation string of the borehole using the outer shell 1 and the monitoring module 3, and at the same time, it can also continuously supply power to the monitoring module 3.

[0032] Therefore, through the integrated arrangement of the acquisition module 2, the monitoring module 3 and the power storage module 4 in the outer shell 1, and the cooperation among the acquisition module 2, the monitoring module 3 and the power storage module 4, direct and continuous monitoring of the pressure in the borehole isolation string can be achieved, thereby avoiding the error problem caused by indirect measurement, and then accurately and comprehensively measuring the whole process data such as the rock fracture pressure, rock formation expansion pressure of each fracturing segment in the borehole.

[0033] It should be noted that the housing 1 is used for the integrated arrangement of the acquisition module 2, the monitoring module 3 and the power storage module 4, and is adapted to the narrow space in the borehole. The specific type of the housing 1 can be set according to actual needs and is not limited to this.

[0034] The acquisition module 2 is used to collect the pressure in the isolation pipe string in the borehole. The specific type of the acquisition module 2 can be set according to actual needs and is not limited to this. For example, the acquisition module 2 can be a pressure sensor with a water pressure measurement range of 0MPa-60MPa and a measurement accuracy of 0.01MPa.

[0035] The monitoring module 3 is used to control the acquisition module 2 to collect the pressure in the borehole greater than the preset pressure value according to the preset frequency value. The specific type of the monitoring module 3 can be set according to actual needs and is not limited to this. For example, the monitoring module 3 can be a processor and a supporting circuit of the processor.

[0036] Among them, the preset frequency value and the preset pressure value can be set according to actual needs, without limitation. For example, the frequency can be 0.05s and the pressure can be 3MPa. That is to say, the acquisition module 2 collects data once every 0.05s, and in the collected data, the pressure values ​​below 3MPa are filtered or ignored.

[0037] The setting of preset pressure values ​​can enable the water pressure monitoring device to automatically remove invalid data, thereby improving monitoring accuracy and efficiency.

[0038] The power storage module 4 is used to store electrical energy and to supply power to the monitoring module 3 so that the water pressure monitoring device can be independently arranged in the isolation pipe column of the borehole. The specific type of the power storage module 4 can be set according to actual needs and is not limited to this. For example, the power storage module 4 can be a battery and a supporting circuit of the battery.

[0039] The isolation pipe string of the borehole refers to the flow pipe string between two packers in the borehole, and the two ends of the shell 1 are fixed in the isolation pipe string through the internal and external threaded joints of the pipe string.

[0040] like Figure 1 As shown, in some embodiments, the housing 1 includes: a tube body 11, a first end cap 12, and a second end cap 13. The tube body 11 is arranged in a borehole, and the diameter of the tube body 11 is smaller than the diameter of the borehole. The first end cap 12 is detachably sealed and covered at one end of the tube body 11, and the second end cap 13 is detachably sealed and covered at one end of the tube body 11 away from the first end cap 12. Among them, the collection module 2, the monitoring module 3, and the power storage module 4 are sequentially arranged in the tube body 11 along the direction from the first end cap 12 to the second end cap 13, and the collection end of the collection module 2 extends outside the first end cap 12.

[0041] It can be understood that since the collection module 2, the monitoring module 3 and the power storage module 4 are sequentially arranged in the tube body 11 along the direction from the first end cover 12 to the second end cover 13, and the collection end of the collection module 2 extends outside the first end cover 12, the collection module 2, the monitoring module 3 and the power storage module 4 can be orderly integrated in the shell 1. At the same time, based on the fact that the diameter of the tube body 11 is smaller than the diameter of the borehole, the shell 1 can be arranged in the borehole without affecting the fluid flowing in the borehole.

[0042] Since the first end cover 12 is detachably sealed and covered at one end of the tube body 11, the tube body 11 can use the first end cover 12 to achieve sealing coverage at one end, thereby ensuring the safe and stable operation of the collection module 2, the monitoring module 3 and the power storage module 4 in the tube body 11, and facilitating the disassembly and assembly of the collection module 2, the monitoring module 3 and the power storage module 4 in the tube body 11; since the second end cover 13 is detachably sealed and covered at one end of the tube body 11 away from the first end cover 12, the tube body 11 can use the second end cover 13 to achieve sealing coverage at the other end, thereby ensuring the safe and stable operation of the collection module 2, the monitoring module 3 and the power storage module 4 in the tube body 11, and facilitating the disassembly and assembly of the collection module 2, the monitoring module 3 and the power storage module 4 in the tube body 11.

[0043] It should be noted that the tube body 11 serves as the main structure of the shell 1, and is used to integrate the collection module 2, the monitoring module 3 and the power storage module 4. The specific type of the tube body 11 can be set according to actual needs and is not limited to this. For example, the tube body 11 is an oblong tube, made of wear-resistant non-magnetic steel, and the outer diameter can be 35 mm. Based on the tube body 11, the total length of the shell 1 can be 300 mm.

[0044] The first end cover 12 is used for sealing and covering one end of the tube body 11 . The specific type of the first end cover 12 can be set according to actual needs and is not limited to this. For example, the first end cover 12 is a columnar structure, and the outer diameter of the first end cover 12 is close to the outer diameter of the tube body 11 .

[0045] The second end cap 13 is used to seal and cover the other end of the tube body 11. The specific type of the second end cap 13 can be set according to actual needs and is not limited to this. For example, the second end cap 13 is a columnar variable diameter structure, and the outer diameter of the second end cap 13 close to the tube body 11 is close to the outer diameter of the tube body 11, and the outer diameter of the second end cap 13 away from the tube body 11 is smaller than the outer diameter of the tube body 11.

[0046] like Figure 1 As shown, in some embodiments, the housing 1 further includes: a first protruding tube 14, which is disposed on a side of the first end cover 12 close to the second end cover 13, and an outer surface of the first protruding tube 14 is threadedly connected to an inner surface of the end of the tube body 11 away from the second end cover 13.

[0047] It can be understood that since the first protruding tube 14 is arranged on the side of the first end cover 12 close to the second end cover 13, and the outer surface of the first protruding tube 14 is threadedly connected to the inner surface of the end of the tube body 11 away from the second end cover 13, the first end cover 12 can be stably arranged at the end of the tube body 11 away from the second end cover 13 by utilizing the threaded connection between the first protruding tube 14 and the tube body 11, and the sealing of the end of the tube body 11 away from the second end cover 13 is ensured, while also facilitating the disassembly and assembly of the first end cover 12.

[0048] It should be noted that the first protruding tube 14 serves as an extension structure of the first end cover 12, and is used to be threadedly arranged at one end of the tube body 11 away from the second end cover 13. The specific type of the first protruding tube 14 can be set according to actual needs and is not limited to this. For example, the first protruding tube 14 is a tubular structure, and the outer diameter of the first protruding tube 14 is smaller than the outer diameter of the first end cover 12 and is adapted to the inner diameter of the tube body 11.

[0049] like Figure 1 As shown, in some embodiments, the housing 1 further includes: a second protruding tube 15, which is arranged on a side of the second end cover 13 close to the first end cover 12, and the outer surface of the second protruding tube 15 is threadedly connected to the inner surface of the end of the tube body 11 away from the first end cover 12.

[0050] It can be understood that since the second protruding tube 15 is arranged on the side of the second end cover 13 close to the first end cover 12, and the outer surface of the second protruding tube 15 is threadedly connected to the inner surface of the end of the tube body 11 away from the first end cover 12, the second end cover 13 can be stably arranged at the end of the tube body 11 away from the first end cover 12 by utilizing the threaded connection between the second protruding tube 15 and the tube body 11, and the sealing of the end of the tube body 11 away from the first end cover 12 is ensured, and the disassembly and assembly of the second end cover 13 is also facilitated.

[0051] It should be noted that the second protruding tube 15 serves as an extension structure of the second end cover 13, and is used to be threadedly arranged at the end of the tube body 11 away from the first end cover 12. The specific type of the second protruding tube 15 can be set according to actual needs and is not limited to this. For example, the second protruding tube 15 is a tubular structure, and the outer diameter of the second protruding tube 15 is smaller than the outer diameter of the second end cover 13 and is adapted to the inner diameter of the tube body 11.

[0052] like Figure 1 As shown, in some embodiments, the housing 1 further includes: at least one first sealing ring 16, the outer surface of the first protruding tube 14 is provided with at least one first annular groove, the first sealing ring 16 is sleeved in the first annular groove, and the first sealing ring 16 abuts against the inner surface of the tube body 11.

[0053] It can be understood that since the first sealing ring 16 is sleeved in the first annular groove and the first sealing ring 16 abuts against the inner surface of the tube body 11, the outer surface of the first protruding tube 14 and the inner surface of the tube body 11 can be filled with the first sealing ring 16 to achieve a better sealing effect, thereby ensuring the safe and stable operation of the collection module 2, the monitoring module 3 and the power storage module 4 in the tube body 11.

[0054] It should be noted that the first sealing ring 16 is used to strengthen the sealing effect between the outer surface of the first protruding tube 14 and the inner surface of the tube body 11. The specific type of the first sealing ring 16 can be set according to actual needs and is not limited to this. For example, the first sealing ring 16 can be a rubber ring. When the first protruding tube 14 is threadedly arranged in the tube body 11, the first sealing ring 16 is in a compressed state and is arranged between the outer surface of the first protruding tube 14 and the inner surface of the tube body 11.

[0055] like Figure 1 As shown, in some embodiments, the housing 1 further includes: at least one second sealing ring 17, the outer surface of the second protruding tube 15 is provided with at least one second annular groove, the second sealing ring 17 is sleeved in the second annular groove, and the second sealing ring 17 abuts against the inner surface of the tube body 11.

[0056] It can be understood that since the second sealing ring 17 is sleeved in the second annular groove and the second sealing ring 17 abuts against the inner surface of the tube body 11, the second sealing ring 17 can be used to fill the outer surface of the second protruding tube 15 and the inner surface of the tube body 11 to achieve a better sealing effect, thereby ensuring the safe and stable operation of the collection module 2, the monitoring module 3 and the power storage module 4 in the tube body 11.

[0057] It should be noted that the second sealing ring 17 is used to strengthen the sealing effect between the outer surface of the second protruding tube 15 and the inner surface of the tube body 11. The specific type of the second sealing ring 17 can be set according to actual needs and is not limited to this. For example, the second sealing ring 17 can be a rubber ring. When the second protruding tube 15 is threadedly arranged in the tube body 11, the second sealing ring 17 is in a compressed state and is arranged between the outer surface of the second protruding tube 15 and the inner surface of the tube body 11.

[0058] like Figure 1 As shown, in some embodiments, the device also includes: an aviation plug 5, which is arranged in the tube body 11, and the aviation plug 5 is located at one end of the power storage module 4 close to the second end cover 13, and the communication end of the aviation plug 5 is connected to the second communication end of the monitoring module 3.

[0059] It can be understood that since the aviation plug 5 is located at one end of the power storage module 4 close to the second end cover 13, and the communication end of the aviation plug 5 is connected to the second communication end of the monitoring module 3, the monitoring module 3 can use the aviation plug 5 to communicate with external equipment with high quality, thereby making the use of the water pressure monitoring device more flexible and convenient.

[0060] It should be noted that the aviation plug 5, also known as the aviation jack, is an electrical connector with excellent properties such as high reliability, durability, adaptability, waterproofness and dustproofness. The specific type of the aviation plug 5 can be set according to actual needs and there is no restriction on this.

[0061] The aviation plug 5 with excellent waterproof performance or waterproof treatment can be extended outside the second end cover 13 .

[0062] like Figure 1 As shown, in some embodiments, the device further includes: a first positioning ring 6, which is sleeved on one end of the housing 1 close to the collection end of the collection module 2, and is clamped on one end of the isolation string.

[0063] It can be understood that since the first positioning ring 6 is sleeved on one end of the outer shell 1 close to the collection end of the collection module 2, and the first positioning ring 6 is clamped on one end in the isolation pipe string, the end of the outer shell 1 close to the collection end of the collection module 2 can be stably arranged in the isolation pipe string of the borehole by using the first positioning ring 6, thereby reducing the influence of the flowing fluid on the collection module 2, and further ensuring the accurate monitoring of the pressure by the water pressure monitoring device.

[0064] It should be noted that the first positioning ring 6 is used to clamp the end of the housing 1 close to the collection end of the collection module 2 in the end of the isolation column. The specific type of the first positioning ring 6 can be set according to actual needs and is not limited to this.

[0065] like Figure 1 As shown, in some embodiments, the device further includes: a second positioning ring 7, which is sleeved on an end of the housing 1 away from the first positioning ring 6, and the second positioning ring 7 is clamped in an end of the isolation string away from the first positioning ring 6.

[0066] It can be understood that since the second positioning ring 7 is sleeved on the end of the outer shell 1 away from the first positioning ring 6, and the second positioning ring 7 is clamped in the end of the isolation pipe column away from the first positioning ring 6, the end of the outer shell 1 away from the first positioning ring 6 can be stably arranged in the isolation pipe column of the borehole by means of the second positioning ring 7, thereby reducing the influence of the flowing fluid on the collection module 2, and further ensuring the accurate monitoring of the pressure by the water pressure monitoring device.

[0067] It should be noted that the second positioning ring 7 is used to clamp one end of the housing 1 away from the first positioning ring 6 to the other end in the isolation string. The specific type of the second positioning ring 7 can be set according to actual needs and is not limited to this.

[0068] like Figure 1 As shown, in some embodiments, a plurality of protrusions are arranged on the outer circumferential surface of the first positioning ring 6 at circumferential intervals along the first positioning ring 6, and one end of the protrusion away from the first positioning ring 6 abuts against the inner surface of the isolation pipe column, and a first flow channel 8 is formed between adjacent protrusions.

[0069] It can be understood that since a plurality of protrusions are arranged on the outer circumferential surface of the first positioning ring 6 at circumferential intervals along the first positioning ring 6, and the end of the protrusion away from the first positioning ring 6 abuts against the inner surface of the isolation pipe string, the first positioning ring 6 can be stably arranged on the inner surface of the borehole isolation pipe string through the plurality of protrusions. At the same time, since the first flow channel 8 is formed between adjacent protrusions, the fluid can smoothly pass through the first positioning ring 6 using the first flow channel 8. Therefore, while ensuring the stable arrangement of the outer shell 1, it does not affect the flow of the fluid in the borehole.

[0070] It should be noted that the first positioning ring 6 is arranged with multiple protrusions to form a star-shaped structure. The specific type and number of the protrusions can be set according to actual needs and are not limited to this. For example, the protrusions are conical structures with round heads, and the number is five.

[0071] like Figure 1 As shown, in some embodiments, the outer circumferential surface of the second positioning ring 7 abuts against the inner surface of the isolation string, and the second positioning ring 7 is provided with a plurality of second flow passages 9 at intervals along the circumference of the first positioning ring 6. Among them, the outer circumferential surface of the second positioning ring 7 is provided with a third annular groove, and a third sealing ring 10 is sleeved in the third annular groove, and the third sealing ring 10 abuts against the inner surface of the isolation string.

[0072] It can be understood that since the outer circumferential surface of the second positioning ring 7 abuts against the inner surface of the isolation string, the second positioning ring 7 can be stably arranged on the inner surface of the borehole isolation string. At the same time, since the second positioning ring 7 is provided with multiple second flow channels 9 at circumferential intervals along the first positioning ring 6, the fluid can smoothly pass through the second positioning ring 7 using the second flow channels 9. Therefore, while ensuring the stable arrangement of the outer shell 1, it does not affect the flow of the fluid in the borehole.

[0073] Furthermore, since the third sealing ring 10 is sleeved in the third annular groove and abuts against the inner surface of the isolation column, the outer surface of the second positioning ring 7 and the inner surface of the isolation column can be filled with the third sealing ring 10 to achieve a better sealing effect, thereby reducing the fluid passing between the outer surface of the second positioning ring 7 and the inner surface of the isolation column, thereby ensuring the stable arrangement of the second positioning ring 7 in the isolation column.

[0074] It should be noted that the second positioning ring 7 is provided with a plurality of second flow channels 9 to form a disc-shaped structure with a plurality of hollow areas, wherein the specific type and quantity of the second flow channels 9 can be set according to actual needs and are not limited thereto. For example, the second flow channels 9 can be fan-shaped and the number is three.

[0075] like Figure 2As shown, in some embodiments, the monitoring module 3 includes: a differential operational amplifier unit 31, a processing unit 32, a data storage unit 33, a setting storage unit 34, a clock unit 35 and a serial communication unit 36, the differential operational amplifier unit 31 is arranged in the shell 1, and the first communication end of the differential operational amplifier unit 31 is connected to the communication end of the acquisition module 2, the processing unit 32 is arranged in the shell 1, and the first communication end of the processing unit 32 is connected to the second communication end of the differential operational amplifier unit 31, the data storage unit 33 is arranged in the shell 1, and the communication end of the data storage unit 33 is connected to the second communication end of the processing unit 32, the setting storage unit 34 is arranged in the shell 1, and the communication end of the setting storage unit 34 is connected to the third communication end of the processing unit 32, the clock unit 35 is arranged in the shell 1, and the communication end of the clock unit 35 is connected to the fourth communication end of the processing unit 32, and the serial communication unit 36 ​​is arranged in the shell 1, and the communication end of the serial communication unit 36 ​​is connected to the fifth communication end of the processing unit 32.

[0076] It can be understood that, since the first communication end of the differential operational amplifier unit 31 is connected to the communication end of the acquisition module 2, and the first communication end of the processing unit 32 is connected to the second communication end of the differential operational amplifier unit 31, the differential operational amplifier unit 31 can use the differential amplification principle to amplify, filter and process the pressure signal collected by the acquisition module 2 and send it to the processing unit 32; since the communication end of the data storage unit 33 is connected to the second communication end of the processing unit 32, the data storage unit 33 can use its own storage capacity to store the pressure data monitored by the processing unit 32; since the communication end of the storage unit 34 is connected to the third communication end of the processing unit 32, the storage unit 34 can use its own data preprocessing capability and identify the valid data of the processing unit 32 according to the threshold screening rule; since the communication end of the clock unit 35 is connected to the fourth communication end of the processing unit 32, the clock unit 35 can provide a timing reference for the processing unit 32; since the communication end of the serial communication unit 36 ​​is connected to the fifth communication end of the processing unit 32, the processing unit 32 can use the serial communication unit 36 ​​to realize serial communication.

[0077] Therefore, through the cooperation of the differential operational amplifier unit 31, the data storage unit 33, the setting storage unit 34, the clock unit 35 and the serial communication unit 36, the high efficiency and high precision operation of the processing unit 32 is guaranteed.

[0078] It should be noted that the differential operational amplifier unit 31 is used to amplify, filter, and process the pressure signal collected by the acquisition module 2 and then send it to the processing unit 32. The specific type of the differential operational amplifier unit 31 can be set according to actual needs and is not limited to this. For example, the differential operational amplifier unit 31 can be a differential operational amplifier circuit.

[0079] The data storage unit 33 is used to store the pressure data monitored by the processing unit 32. The specific type of the data storage unit 33 can be set according to actual needs and is not limited to this. For example, the data storage unit 33 can be a data storage device.

[0080] The storage unit 34 is set to identify valid data of the processing unit 32 according to the threshold screening rule, for example: the pressure detected by the acquisition module 2 is screened according to a preset pressure value. The specific type of the storage unit 34 can be set according to actual needs and is not limited to this. For example, the storage unit 34 can be set to a memory.

[0081] The clock unit 35 is used to provide a timing reference for the processing unit 32. The specific type of the clock unit 35 can be set according to actual needs and is not limited to this.

[0082] The serial communication unit 36 ​​is used for serial communication of the processing unit 32. The specific type of the serial communication unit 36 ​​can be set according to actual needs and is not limited to this. For example, the serial communication unit 36 ​​can be a 232 serial port.

[0083] like Figure 3 As shown, in some embodiments, the power storage module 4 includes: a lithium battery 41, a protection circuit 42, a switching power supply 43 and a voltage regulator 44, the lithium battery 41 is arranged in the shell 1, the protection circuit 42 is arranged in the shell 1, and the power supply end of the protection circuit 42 is connected to the power supply end of the lithium battery 41, the switching power supply 43 is arranged in the shell 1, and the power supply end of the switching power supply 43 is connected to the power supply end of the protection circuit 42, the voltage regulator 44 is arranged in the shell 1, and the power supply end of the voltage regulator 44 is connected to the power supply end of the switching power supply 43, and the power supply end of the voltage regulator 44 is connected to the power supply end of the monitoring module 3.

[0084] It can be understood that since the power supply end of the protection circuit 42 is connected to the power supply end of the lithium battery 41, and the power supply end of the switching power supply 43 is connected to the power supply end of the protection circuit 42, the power supply end of the voltage regulator 44 is connected to the power supply end of the switching power supply 43, and the power supply end of the voltage regulator 44 is connected to the power supply end of the monitoring module 3, the electric energy output by the lithium battery 41 is transferred to the switching power supply 43 under the protection of the protection circuit 42, and then transmitted to the monitoring module 3 under the conversion of the switching power supply 43 and the voltage stabilization of the voltage regulator 44, thereby ensuring the stable and safe operation of the monitoring module 3.

[0085] It should be noted that the lithium battery 41 is used to power the monitoring module 3 , and the specific type of the lithium battery 41 can be set according to actual needs and is not limited to this.

[0086] The protection circuit 42 is used to protect the output of electrical energy by the lithium battery 41. The specific type of the protection circuit 42 can be set according to actual needs and is not limited to this. For example, the protection circuit 42 can be an overcurrent protection circuit 42, an overvoltage protection circuit 42, an overtemperature protection circuit 42, etc.

[0087] The switching power supply 43 is used for converting electric energy, for example, voltage step-up, voltage step-down, etc. The specific type of the switching power supply 43 can be set according to actual needs and is not limited thereto.

[0088] The voltage regulator 44 is used for stabilizing the voltage of electric energy. The specific type of the voltage regulator 44 can be set according to actual needs and is not limited thereto. For example, the voltage regulator 44 can be a low-dropout regulator 44 (Low-dropout regulator, LDO).

[0089] In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0090] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0092] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A regional fracturing staged water pressure monitoring device, characterized in that: include: A housing, the housing being disposed in a isolation string in a rock formation borehole; A collection module, wherein the collection module is disposed in the housing, and a collection end of the collection module extends outside the housing; A monitoring module, wherein the monitoring module is disposed in the housing, and a first communication terminal of the monitoring module is connected to a communication terminal of the acquisition module, and the monitoring module is used to control the acquisition module to acquire a pressure greater than a preset pressure value in the borehole according to a preset frequency value; A power storage module, wherein the power storage module is disposed in the housing, and a power supply end of the power storage module is connected to a power supply end of the monitoring module; Wherein, the shell comprises: a tube body, a first end cover and a second end cover, the tube body is arranged in the borehole, and the diameter of the tube body is smaller than the diameter of the borehole, the first end cover is detachably sealed and covered at one end of the tube body, and the second end cover is detachably sealed and covered at one end of the tube body away from the first end cover; wherein the collection module, the monitoring module and the power storage module are sequentially arranged in the tube body along the direction from the first end cover to the second end cover, and the collection end of the collection module extends outside the first end cover; The housing further comprises: a first protruding tube and / or a second protruding tube, wherein the first protruding tube is arranged on a side of the first end cover close to the second end cover, and the outer surface of the first protruding tube is threadedly connected to the inner surface of the end of the tube body away from the second end cover, and the second protruding tube is arranged on a side of the second end cover close to the first end cover, and the outer surface of the second protruding tube is threadedly connected to the inner surface of the end of the tube body away from the first end cover; The housing further comprises: at least one first sealing ring and / or at least one second sealing ring, the outer surface of the first protruding tube is provided with at least one first annular groove, the first sealing ring is sleeved in the first annular groove, and the first sealing ring abuts against the inner surface of the tube body, the outer surface of the second protruding tube is provided with at least one second annular groove, the second sealing ring is sleeved in the second annular groove, and the second sealing ring abuts against the inner surface of the tube body; The device further comprises: an aviation plug, which is arranged in the tube body and located at one end of the power storage module close to the second end cover, and a communication end of the aviation plug is connected to the second communication end of the monitoring module.

2. The regional fracturing staged water pressure monitoring device according to claim 1, characterized in that: The device also includes: A first positioning ring, wherein the first positioning ring is sleeved on one end of the housing close to the collection end of the collection module, and the first positioning ring is clamped on one end of the isolation string; and / or, The second positioning ring is sleeved on an end of the housing away from the first positioning ring, and the second positioning ring is clamped in an end of the isolation string away from the first positioning ring.

3. The regional fracturing staged water pressure monitoring device according to claim 2, characterized in that: A plurality of protrusions are arranged on the outer circumferential surface of the first positioning ring at intervals along the circumference of the first positioning ring, and one end of the protrusion away from the first positioning ring abuts against the inner surface of the isolation column, and a first flow channel is formed between adjacent protrusions.

4. The regional fracturing staged water pressure monitoring device according to claim 2, characterized in that: The outer circumferential surface of the second positioning ring abuts against the inner surface of the isolation pipe string, and the second positioning ring is provided with a plurality of second flow passages spaced apart along the circumference of the first positioning ring; Wherein, a third annular groove is arranged on the outer circumferential surface of the second positioning ring, and a third sealing ring is sleeved in the third annular groove, and the third sealing ring is in contact with the inner surface of the isolation pipe string.

5. The regional fracturing staged water pressure monitoring device according to claim 1, characterized in that: The monitoring module comprises: A differential operational amplifier unit, wherein the differential operational amplifier unit is disposed in the housing, and a first communication end of the differential operational amplifier unit is connected to a communication end of the acquisition module; A processing unit, wherein the processing unit is disposed in the housing, and a first communication terminal of the processing unit is connected to a second communication terminal of the differential operational amplifier unit; A data storage unit, wherein the data storage unit is disposed in the housing, and a communication end of the data storage unit is connected to a second communication end of the processing unit; A setting storage unit is provided, wherein the setting storage unit is provided in the housing, and a communication end of the setting storage unit is connected to a third communication end of the processing unit; A clock unit, wherein the clock unit is disposed in the housing, and a communication terminal of the clock unit is connected to a fourth communication terminal of the processing unit; A serial communication unit is disposed in the housing, and a communication end of the serial communication unit is connected to the fifth communication end of the processing unit.

6. The regional fracturing staged water pressure monitoring device according to claim 1, characterized in that: The power storage module comprises: A lithium battery, wherein the lithium battery is disposed in the housing; A protection circuit, wherein the protection circuit is disposed in the housing, and a power supply end of the protection circuit is connected to a power supply end of the lithium battery; A switching power supply, wherein the switching power supply is arranged in the housing, and a power supply terminal of the switching power supply is connected to a power supply terminal of the protection circuit; A voltage stabilizer is arranged in the housing, and a power supply end of the voltage stabilizer is connected to a power supply end of the switching power supply, and a power supply end of the voltage stabilizer is connected to a power supply end of the monitoring module.

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