Rope-shaped dirt separator

Abstract

The utility model relates to the field of well drilling dirt removal, in particular to a rope-shaped dirt remover which comprises a conveying pipe, a rope pipe and a storage box, the conveying pipe and the rope pipe are both communicated with the storage box, the storage box and the rope pipe are of an integrated structure, the front end of the rope pipe is an inclined face, and air spraying holes are evenly formed in the outer side of the front end of the rope pipe. The product is simple in structure, oil stains on the well wall can be removed without contacting with the well wall, the requirements of different well diameters can be met through one-time model selection, intermediate lifting and replacement are not needed, and the working efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of well drilling and dirt removal, and particularly relates to a cable-shaped dirt remover. BACKGROUND

[0002] Rich oil coal in-situ pyrolysis mining is a brand new coal low-carbon development mode, and drilling type in-situ pyrolysis is a kind of mining mode in which drilling is implemented on the ground, heat is injected into the coal seam, coal seam pyrolysis is realized, and pyrolyzed coal gas and tar are extracted to the ground through drilling. At present, the rich oil coal in-situ pyrolysis oil extraction demonstration project has been successful in Shaanxi, which has aroused widespread attention in the society. According to the research of Wang Shuangming et al., there are more than 500 billion tons of rich oil coal in the west of China, and the development potential is huge. However, in the in-situ pyrolysis mining, as the temperature of the well wall gradually decreases, the temperature of the tar and mixed gas decreases, which leads to state change and viscosity enhancement, and the tar wall-hanging phenomenon is prominent, which is not conducive to the drainage and mining of pyrolysis tar. The composition of the well wall pollutants in the rich oil coal in-situ pyrolysis is mainly superfine coal powder and heavy oil, which is different from the cementation mode of ordinary oil wells and salt wells, and the cementation capacity of the pollutants is not strong, mainly wall-hanging.

[0003] The existing well wall dirt removal usually refers to taking some methods to remove the pollutants on the well wall to keep the well wall clean and prevent further pollution. Common pollutants include dust, oil stains, etc. The commonly used well wall dirt removal method in China is water flushing well method to remove silt. A pump is used to jet clean water from the nozzle of a hose at high speed to impact the silt to make it float, and another pump is used to pump the silt out of the well. Zhu Hongwei pointed out that for the oil well scale and oil stain, the key to removing the scale of the well type with slight scale is the step length of the increased outer diameter. Acid pickling method is used to remove the well type with serious scale. First, the well type is soaked with chemical agents, and then a scraper is used to remove the scale. Milling method is used to remove the well type with abnormal scale. The milling cone is milled to the bottom of the well. Feng Xuedong et al. pointed out that the well wall pollutants generally include mud pollution and oil well wax pollution. When the filter cake formed by the mud pollutes the well wall, the scraping wall + well washing method can be used to remove the pollution. The wax pollution can be removed by using the wax inhibitor, scraping wall and high-temperature liquid flushing method. Chen Donghui et al. developed the jet assembly and special welding bead abrasive of coiled tubing transmission for oil well scale removal, which improved the scale removal effect. Xu Jialong used the downhole tool flushing, scale scraper, perforation, pipe cutting, forging and milling, and lining process to treat the halogen well blockage. The scraper is a commonly used well wall dirt removal device. However, the size of the existing scraper is fixed, and it needs to be lifted to the wellhead for replacement each time, which is low in working efficiency. UTILITY MODEL CONTENT

[0004] To achieve the above-mentioned purpose, the utility model aims to provide a cable-shaped dirt remover which is suitable for the need of changing different well diameters and does not need intermediate lifting and replacement, thereby effectively improving the working efficiency. The utility model provides the following technical scheme.

[0005] A string-shaped dirt cleaner comprises a conveying pipe, a cable pipe and a storage tank for storing high-temperature and high-pressure medium, the conveying pipe and the cable pipe are communicated with the storage tank and the storage tank is integrated with the cable pipe, the front end of the cable pipe is beveled and the outer side of the cable pipe is uniformly provided with air injection holes, the using method of the device is as follows: connecting the conveying pipe, connecting the storage tank on the drill rod, opening the ground heating device to transport high-temperature and high-pressure medium (such as inert gas, water vapor or high-temperature water etc.), starting the drilling machine, the drilling machine drives the drill rod to rotate, the high-temperature and high-pressure medium is transported from the storage tank to the cable pipe, under the action of centrifugal force, the cable pipe is opened, finally the high-temperature and high-pressure medium is injected from the air injection holes of the cable pipe, thereby removing the oil stains on the well wall, with the drill rod advancing, the oil stains on the well wall are removed, if the effect is not good, the operation can be repeated at key positions, the product does not need to contact the well wall, the high-temperature and high-pressure medium is transported from the air injection holes to complete the cleaning of the oil stains by high-pressure injection.

[0006] As a further scheme of the utility model: the cable pipe is made of high-temperature resistant rubber material, and has long service life.

[0007] As a further scheme of the utility model: the length of the cable pipe is 0.6-0.8 times of the radius of the well wall, and the cable pipe is suitable for various abnormal well walls.

[0008] As a further scheme of the utility model: the air injection holes are uniformly distributed on the outer side of the front end of the cable pipe at an angle of 0-45 degrees, and all the oil stains around the cable pipe can be removed to ensure the cleaning effect.

[0009] As a further scheme of the utility model: the storage tank is provided with threads, and the storage tank is connected to the drill rod through the threads.

[0010] As a further scheme of the utility model: the storage tank is fastened to the drill rod through fasteners, and the fasteners are preferably buckles.

[0011] Compared with the prior art, the utility model has the advantages of:

[0012] The product has simple structure, can remove the oil stains on the well wall without contacting the well wall, can be applied to different well diameters once the type is selected, does not need to be lifted and replaced in the middle, and effectively improves the working efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the string-shaped dirt cleaner in the utility model embodiment.

[0014] Figure 2 It is a top view. Figure 1

[0015] Figure 3 It is a sectional view of the cable pipe in the string-shaped dirt cleaner in the utility model embodiment.

[0016] ​Figure 4 This is another cross-sectional view of the cable tube in the cable-like decontaminator in this embodiment of the present invention.

[0017] Figure 5 This is a schematic diagram of another structure of the cord-shaped dirt remover in an embodiment of this utility model.

[0018] Figure 6 This is an unfolded cross-sectional view of a cable-like dirt separator in an embodiment of this utility model.

[0019] Figure 7 This is another unfolded cross-sectional view of the cord-shaped dirt separator in an embodiment of this utility model.

[0020] In the diagram: 1. Delivery pipe; 2. Cable; 3. Storage box; 4. Fastener; 5. Thread; 6. Air jet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0023] Please see Figures 1-2 This utility model provides a cable-like decontaminator, comprising a conveying pipe 1 for conveying high-temperature and high-pressure media, a cable tube 2 for spraying high-temperature and high-pressure media, and a storage tank 3 for storing the high-temperature and high-pressure media. The conveying pipe 1 and the cable tube 2 are both connected to the storage tank 3, and the storage tank 3 and the cable tube 2 are integrally formed. Air jet holes 6 are evenly distributed on the outer side of the front end of the cable tube 2, and the front end of the cable tube 2 is beveled. The method of using this device is as follows: connect the conveying pipe 1 to the storage tank 3, connect the storage tank 3 to the drill rod, and turn on the ground heating device... Transporting high-temperature and high-pressure media (such as inert gas, steam, or high-temperature water); starting the drilling rig, which drives the drill rod to rotate, the high-temperature and high-pressure media is transported from the storage tank 3 to the cable tube 2. Under the action of centrifugal force, the cable tube 2 opens, and finally the high-temperature and high-pressure media is sprayed out from the jet hole 6 of the cable tube 2, thereby removing oil stains from the well wall; as the drill rod advances, the oil stains on the well wall are removed. If the effect is not good, the operation can be repeated in key areas. This product does not need to contact the well wall. The high-temperature and high-pressure media cleans the oil stains by high-pressure jetting from the jet hole 6.

[0024] In one embodiment of this utility model, the cable tube 2 is made of high-temperature resistant rubber material, which has a long service life. At this time, the cable tube 2 is a flexible structure that can pass through various abnormal well walls and is applicable to a wide range of scenarios.

[0025] In one embodiment of this utility model, the length of the cable tube 2 is 0.6-0.8 times the radius of the well wall, which is suitable for various abnormal well walls.

[0026] In one embodiment of this utility model, the air jet holes 6 are evenly distributed on the outer side of the front end of the cable tube 2 at an angle of 0-45 degrees, which can remove all oil stains around the cable tube 2 and ensure the cleaning effect.

[0027] In one embodiment of this utility model, the storage box 3 is provided with a thread 5, and the storage box 3 is connected to the drill rod through the thread 5, which provides a strong connection and prevents it from easily coming loose during use.

[0028] In one embodiment of this utility model, the storage box 3 is reinforced to the drill rod by fasteners 4. The fasteners 4 are preferably buckles, which achieve double reinforcement and ensure that they will not come loose during use.

[0029] Please see Figure 5 In one embodiment of this utility model, the cable tube 2 can be single-row, double-row, or multi-row, and can be set according to the amount of oil stains to speed up the cleaning efficiency.

[0030] In one embodiment of this utility model, the cable tube 2 is made of metal, which is readily available on the market and has good performance.

[0031] Please see Figures 3-4 In one embodiment of this utility model, the end of the cable tube 2 is a flat end or a beveled end, which is suitable for different spraying scenarios.

[0032] Please see Figures 6-7 In one embodiment of this utility model, the length of the cable tube 2 can be uniform or set as an arithmetic sequence, which is suitable for different spraying scenarios.

[0033] It should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "fixed," "set up," etc., should be interpreted broadly. For example, they can refer to welded connections, bolted connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cable-like decontaminator, comprising a delivery pipe, a cable tube, and a storage tank for storing high-temperature and high-pressure media, characterized in that, Both the delivery pipe and the cable tube are connected to the storage box, and the storage box and the cable tube are an integral structure. The front end of the cable tube is beveled, and air jet holes are evenly arranged on its outer side.

2. The cord-like separator according to claim 1, characterized in that, The cable tube is made of high-temperature resistant rubber material.

3. The cord-like separator according to claim 1 or 2, characterized in that, The length of the cable is 0.6-0.8 times the radius of the well wall.

4. The cord-like separator according to claim 1, characterized in that, The storage box is threaded and is connected to the drill rod via the thread.

5. The cord-like separator according to claim 4, characterized in that, The storage box is reinforced to the drill pipe using fasteners.

6. The cord-like separator according to claim 1, characterized in that, The air jets are evenly distributed on the outer side of the front end of the cable tube at an angle of 0-45 degrees.

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