Dry ice explosion shaping pressurizer

Abstract

The utility model relates to the technical field of casing shaping, in particular to a dry ice explosion shaping pressurizer. Comprising an upper connector, the lower end of the upper connector is fixedly and hermetically connected with a cylinder body, the lower end of the cylinder body is fixedly and hermetically connected with a connecting sleeve, and the lower end of the connecting sleeve is fixedly connected with a lower connector through a shear pin; the heating wire is electrically connected with a power source and a timing device in the upper connector, a soluble heat insulation barrel is placed in the cylinder body and filled with dry ice, a plug is fixedly and hermetically connected in the lower end of the soluble heat insulation barrel, a piston is slidably and hermetically connected in the cylinder body at the lower end of the plug, and a piston rod is fixedly connected to the lower end of the piston. The lower end of the piston rod penetrates through the connecting sleeve and is fixedly connected with the lower connector. According to the pressurizer, by means of the characteristic that dry ice directly generates gas with the volume being more than multiple times of the original volume after sublimation, thrust is formed to act on the wall of the deformed casing pipe, and rapid and efficient recovery of the casing pipe body is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of casing shaping, in particular to a dry ice explosion shaping pressurizer. Background Art

[0002] Casings widely used in oil and gas extraction and other industrial fields often deform due to external pressure or long-term wear. Traditional repair methods have limitations such as high cost, long cycle time, and low efficiency.

[0003] Patent application number 202211431529.X discloses a method for efficiently fracturing rock using dry ice. This invention utilizes the substantial heat released by thermite reaction to sublimate dry ice, leveraging its rapid expansion to achieve the desired rock fracture. To this end, a solid propulsion repair technology has been proposed. This technology exploits the property of dry ice, which, upon sublimation, directly produces gas many times its original volume. This creates thrust that acts on the deformed casing wall, enabling rapid and efficient restoration of the casing. Utility Model Content

[0004] The main purpose of the utility model is to provide a dry ice explosion-type pressurizer which can accurately control the release time and position of energy generated by dry ice sublimation under the premise of ensuring safety, and realize timed and fixed-point energy release.

[0005] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0006] The dry ice explosion shaping pressurizer includes an upper joint, the lower end of the upper joint is fixedly and sealedly connected to the cylinder body, the lower end of the cylinder body is fixedly and sealedly connected to the connecting sleeve, the lower end of the connecting sleeve is fixedly connected to the lower joint through shear nails, the lower joint is connected to the shaping tool, a rubber bag is fixedly installed in the upper joint, brine is encapsulated in the rubber bag, a heating wire is wrapped and fixed on the outside of the rubber bag, the heating wire is electrically connected to the power supply and timing device in the upper joint, a soluble insulation tube is placed in the cylinder body, the soluble insulation tube is filled with dry ice, the lower end of the soluble insulation tube is fixedly and sealedly connected to a plug, a piston is slidingly and sealedly connected to the cylinder body at the lower end of the plug, the lower end of the piston is fixedly connected to a piston rod, and the lower end of the piston rod passes through the connecting sleeve and is fixedly connected to the lower joint.

[0007] Specifically, the power source is a high temperature resistant battery.

[0008] Specifically, the timing device is a timing control board.

[0009] Specifically, the outer edge of the soluble heat-insulating tube is processed with multiple grooves.

[0010] Specifically, the upper joint is threadedly and sealedly connected to the cylinder body, and the lower end of the cylinder body is threadedly and sealedly connected to the connecting sleeve.

[0011] Specifically, a semiconductor refrigerator is installed on the side wall of the soluble insulation tube, the cold end of the semiconductor refrigerator is located inside the soluble insulation tube, and the hot end of the semiconductor refrigerator is located outside the soluble insulation tube.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This pressurizer utilizes the property that dry ice directly produces gas many times larger than its original volume after sublimation, forming a thrust acting on the deformed casing wall to achieve rapid and efficient recovery of the casing body.

[0014] 2. The installation of a soluble insulation tube ensures that the dry ice does not sublime during the lowering of the pressurizer. Once the pressurizer reaches the set depth, the timing control panel activates after a set time, connecting the high-temperature resistant battery to the heating wire. Once the heating wire is connected, the rubber bladder is damaged by heat, and the brine inside flows out and comes into contact with the soluble insulation tube. Once the soluble insulation tube dissolves, the dry ice sublimates under the influence of the well temperature, allowing the piston, piston rod, lower joint, and shaping tool to descend. During the descent of the shaping tool, the casing can be shaped. This pressurizer can precisely control the release time and location of the energy generated by the sublimation of the dry ice, achieving a timed and targeted energy release. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the pressurizer.

[0016] The names of the parts in the accompanying drawings are: 1. upper connector, 2. high temperature resistant battery, 3. timing control board, 4. heating wire, 5. rubber bag, 6. cylinder body, 7. soluble insulation tube, 8. dry ice, 9. plug, 10. piston, 11. piston rod, 12. connecting sleeve, 13. shear pin, 14. lower connector. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Example 1: Reference Figure 1 As shown, the dry ice explosion-type pressurizer includes an upper joint 1, the lower end of which is fixedly and sealedly connected to a cylinder body 6. Specifically, the upper joint 1 is threadedly and sealedly connected to the cylinder body 6.

[0019] The lower end of the cylinder body 6 is fixedly and sealedly connected to a connecting sleeve 12 . Specifically, the lower end of the cylinder body 6 is threadedly and sealedly connected to the connecting sleeve 12 .

[0020] The lower end of the connecting sleeve 12 is fixedly connected to a lower connector 14 via shear pins 13. This connector connects to a shaping tool, allowing for replacement of different shaping tools depending on the deformation of the sleeve. A rubber bladder 5 is fixedly mounted within the upper connector 1, containing saline solution. A heating wire 4 is wrapped around the outer surface of the rubber bladder, electrically connected to the power supply and timing device within the upper connector 1. Specifically, the power supply is a high-temperature-resistant battery 2. The timing device is a timing control board 3.

[0021] A soluble heat-insulating tube 7 is placed in the cylinder body 6 , and a plurality of grooves are processed on the outer edge of the soluble heat-insulating tube 7 .

[0022] The soluble insulation tube 7 is filled with dry ice 8, and the lower end of the soluble insulation tube 7 is fixedly and sealedly connected to a plug 9, and the cylinder body 6 at the lower end of the plug 9 is slidingly and sealedly connected to a piston 10, and the lower end of the piston 10 is fixedly connected to a piston rod 11, and the lower end of the piston rod 11 passes through the connecting sleeve 12 and is fixedly connected to the lower joint 14.

[0023] Before the pressurizer is lowered into the well, the downhole time is estimated, and the start time of the heating wire 4 is controlled by the timing control board 3 so that the heating wire 4 starts to work after the pressurizer is lowered into the well. By providing a soluble insulation tube 7, it is ensured that the dry ice 8 in the soluble insulation tube 7 does not sublime during the pressurizer's downhole operation.

[0024] After the pressurizer is lowered into the well, the timing control board 3 sets the time and connects the high-temperature resistant battery 2 to the heating wire 4. After the heating wire 4 is connected, the rubber bladder 5 is damaged by the heat, and the brine inside flows out and comes into contact with the soluble insulation tube 7. After the soluble insulation tube 7 melts, the dry ice 8 sublimates under the influence of the temperature in the well, thereby applying pressure to the piston 10, piston rod 11, lower joint 14, and shaping tool. When the shear pin 13 is sheared, the piston 10, piston rod 11, lower joint 14, and shaping tool descend, and the shaping tool can shape the casing during its descent. This pressurizer can precisely control the release time and location of the energy generated by the sublimation of dry ice 8, achieving timed and targeted energy release.

[0025] The outer edge of the soluble heat-insulating tube 7 is processed with multiple grooves to facilitate the salt water to dissolve and perforate the side wall of the soluble heat-insulating tube 7.

[0026] Example 2: Based on Example 1, a semiconductor refrigerator is installed on the side wall of the soluble insulation tube 7, the cold end of the semiconductor refrigerator is located inside the soluble insulation tube 7, and the hot end of the semiconductor refrigerator is located outside the soluble insulation tube 7.

[0027] Before descending the well, the time is estimated, and the operating time of the semiconductor cooler is controlled by the timing control board 3. The semiconductor cooler starts operating at the beginning of the descent, and the timing control board 3 turns off the semiconductor cooler after the pressurizer is lowered. The semiconductor cooler can reduce the temperature inside the soluble insulation tube 7, preventing the soluble insulation tube 7 from rupturing due to sublimation of dry ice 8 during the descent, which could cause the lower connector 14 to activate prematurely.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dry ice explosion-molded pressurizer, comprising an upper connector (1), characterized in that: The lower end of the upper joint (1) is fixedly and sealedly connected to the cylinder (6), the lower end of the cylinder (6) is fixedly and sealedly connected to the connecting sleeve (12), the lower end of the connecting sleeve (12) is fixedly connected to the lower joint (14) through the shear nail (13), the lower joint (14) is connected to the shaping tool, a rubber bag (5) is fixedly installed in the upper joint (1), salt water is encapsulated in the rubber bag (5), a heating wire (4) is wrapped and fixed on the outside of the rubber bag (5), and the heating wire (4) is connected to the upper joint (1). The power supply and timing device are electrically connected, a soluble heat-insulating tube (7) is placed in the cylinder body (6), the soluble heat-insulating tube (7) is filled with dry ice (8), a plug (9) is fixedly and sealedly connected to the lower end of the soluble heat-insulating tube (7), a piston (10) is slidably and sealedly connected to the cylinder body (6) at the lower end of the plug (9), a piston rod (11) is fixedly connected to the lower end of the piston (10), and the lower end of the piston rod (11) passes through the connecting sleeve (12) and is fixedly connected to the lower joint (14).

2. The dry ice explosion shaping pressurizer according to claim 1, characterized in that: The power source is a high temperature resistant battery (2).

3. The dry ice explosion shaping pressurizer according to claim 1, characterized in that: The timing device is a timing control board (3).

4. The dry ice explosion shaping pressurizer according to claim 1, characterized in that: The outer edge of the soluble heat-insulating cylinder (7) is processed with a plurality of grooves.

5. The dry ice explosion shaping pressurizer according to claim 1, characterized in that: The upper joint (1) is threadedly sealed connected to the cylinder body (6), and the lower end of the cylinder body (6) is threadedly sealed connected to the connecting sleeve (12).

6. The dry ice explosion shaping pressurizer according to claim 1, characterized in that: A semiconductor refrigerator is installed on the side wall of the soluble thermal insulation tube (7), the cold end of the semiconductor refrigerator is located inside the soluble thermal insulation tube (7), and the hot end of the semiconductor refrigerator is located outside the soluble thermal insulation tube (7).

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