Loose sediment drilling device and drilling method

Abstract

The present invention proposes a loose sediment drilling device and a drilling method, wherein the loose sediment drilling device comprises a first tube body, a second tube body and a stirring portion. The second tube body is inserted through the first tube body, and the second tube body has a first opening at the end close to the sediment. The stirring portion is configured to be rotatable to stir the surrounding sediment, and the stirring portion is connected to the end or inserted through the second tube body and passes through the first opening. The inner cavity of the first tube body can be passed through by the second tube body, and a certain operating space can be provided. In addition, the first tube body can also be used to prevent the sediment outside the first tube body from collapsing or for drilling. In addition, liquid can be introduced into the inner cavity of the second tube body, and the sediment can be stirred under the action of the stirring portion to avoid the sediment from interfering with the drilling operation or to facilitate the sampling of the sediment. Therefore, the drilling device of the present invention can improve the drilling and sampling efficiency of loose sediments.

Description

Technical Field

[0001] The invention relates to the technical field of drilling, and in particular to a loose sediment drilling device and a drilling method. Background Art

[0002] Coastal or river and lake wetlands usually have abundant surface water, high groundwater levels, and widely distributed sediments of different coarse and fine particles. Drilling in these sites, sampling sediments, pollutants or biomass, and groundwater monitoring (monitoring water head, conductivity, temperature, etc.) are necessary actions that cannot be avoided in multidisciplinary research such as hydrology, geology, environment, chemistry and biology. Because the sandy soil sediments in such areas are loose and easy to collapse or sticky and difficult to form, and the water-containing geology will cause the pits to sink continuously, it becomes very difficult to build monitoring holes and place hydrological monitoring equipment in the monitoring holes. In the related art, conventional soil drills or bulky diesel drilling rigs are used to drill holes for loose sediments, which is time-consuming, labor-intensive and inconvenient to move and operate. Summary of the invention

[0003] The main purpose of the present invention is to provide a loose sediment drilling device and a drilling method, which can improve the drilling and sampling efficiency of loose sediments.

[0004] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0005] A loose sediment drilling device, comprising a first pipe body, a second pipe body and a stirring part;

[0006] The second tube body is disposed through the first tube body, and the end of the second tube body close to the sediment has a first opening;

[0007] The stirring part is configured to be rotatable to stir the surrounding sediments. The stirring part is connected to the end or is penetrated through the second tube body and passes through the first opening.

[0008] In some embodiments, the axis of the first opening is the first axis, and the rotation axis of the agitating portion is parallel to the first axis.

[0009] In some embodiments, the agitating portion is configured to vibrate to agitate surrounding sediment.

[0010] In some embodiments, the drilling device further includes a liquid spraying portion, which is suitable for radially spraying liquid. The liquid spraying portion is connected to the end portion or is penetrated through the second tube body and passes through the first opening.

[0011] In some embodiments, the liquid spraying portion includes a first extension portion and a plurality of second extension portions connected to each other, the first extension portion is connected to the second tube body or is penetrated through the second tube body, and each second extension portion extends radially along the first axis and is spaced apart around the first axis.

[0012] In some embodiments, the first tube body has a second opening at one end away from the sediment, and a liquid extraction chamber is defined between the inner circumferential wall of the first tube body and the outer circumferential wall of the second tube body. The drilling device also includes a liquid extraction part, which is configured to extract the sediment and liquid into the liquid extraction chamber and extract them out from the second opening.

[0013] In some embodiments, the drilling device further includes a sleeve, which is sleeved on the first tube body, the second tube body and the stirring part.

[0014] The embodiment of the second aspect of the present invention further provides a loose sediment drilling method, using the drilling device of any of the above embodiments, the drilling method comprises:

[0015] inserting a drilling device into the sediment;

[0016] Passing liquid into the second tube body;

[0017] Controlling the stirring part to stir the surrounding sediments;

[0018] Extract sediment.

[0019] In some embodiments, the step of inserting a drilling device into the sediment specifically comprises:

[0020] inserting the drilling device to multiple depth positions in sequence;

[0021] The steps for extracting sediment and liquid include:

[0022] Sediments around each depth position are extracted sequentially.

[0023] In some embodiments, the drilling device further includes a sleeve, which is sleeved on the first tube body, the second tube body and the stirring part, and the sleeve has a liquid guide hole. After the step of extracting the sediment, the drilling method further includes:

[0024] Guide the groundwater outside the sleeve into the sleeve through the liquid guide hole.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The loose sediment drilling device of the present invention comprises a first tube body, a second tube body and a stirring part. The second tube body is inserted into the first tube body, and the end of the second tube body close to the sediment has a first opening. The stirring part is configured to be rotatable to stir the surrounding sediment, and the stirring part is connected to the end or inserted into the second tube body and passes out from the first opening. According to the above arrangement, the inner cavity of the first tube body can be passed through by the second tube body, and a certain operating space can be provided. In addition, the first tube body can also be used to prevent the sediment outside the first tube body from collapsing or for drilling. In addition, liquid can be introduced into the inner cavity of the second tube body, and the sediment can be stirred under the action of the stirring part to avoid the sediment from interfering with the drilling operation or to facilitate the sampling of the sediment. Therefore, the drilling device of the present invention can improve the drilling and sampling efficiency of loose sediments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 A side cutaway schematic diagram of a drilling device provided in a first embodiment of the present invention;

[0029] Figure 2 A side cutaway schematic diagram of a drilling device provided in a second embodiment of the present invention;

[0030] Figure 3 A side cutaway schematic diagram of a drilling device provided in a third embodiment of the present invention;

[0031] Figure 4 A side cutaway schematic diagram of a drilling device provided in a fourth embodiment of the present invention;

[0032] Figure 5 A side cutaway schematic diagram of a drilling device provided in a fifth embodiment of the present invention;

[0033] Figure 6 It is a side cutaway schematic diagram of a drilling device provided in a sixth embodiment of the present invention; wherein the dotted arrow indicates the flow direction of the liquid;

[0034] Figure 7 It is a side cutaway schematic diagram of a drilling device provided in a seventh embodiment of the present invention; wherein the dotted arrow indicates the flow direction of the liquid;

[0035] Figure 8A schematic flow chart of a drilling method provided in an embodiment of the second aspect of the present invention;

[0036] Fig. 9 A first partial flow chart of a drilling method provided in another embodiment of the second aspect of the present invention;

[0037] Fig.10 is a second part of the flowchart of the drilling method provided in another embodiment of the second aspect of the present invention; wherein S205 is Fig. 9 The step after S204, and the two steps are adjacent.

[0038] Description of Figure Numbers:

[0039] 100- drilling device;

[0040] 110 - first tube body; 111 - second opening;

[0041] 120 - second tube body; 121 - first opening; 1211 - first axis;

[0042] 130- stirring part;

[0043] 140-liquid spraying portion; 141-first extending portion; 142-second extending portion;

[0044] 150- suction chamber;

[0045] 160-liquid extraction unit;

[0046] 170-sleeve; 171-liquid guide hole;

[0047] 200-Sediment.

[0048] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0051] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] Coastal or river and lake wetlands usually have abundant surface water, high groundwater levels, and widely distributed sediments of different coarse and fine particles. Drilling in these sites, sampling sediments, pollutants or biomass, and groundwater monitoring (monitoring water head, conductivity, temperature, etc.) are necessary actions that cannot be avoided in multidisciplinary research such as hydrology, geology, environment, chemistry and biology. Because the sandy soil sediments in such areas are loose and easy to collapse or sticky and difficult to form, and the water-containing geology will cause the pits to sink continuously, it becomes very difficult to build monitoring holes and place hydrological monitoring equipment in the monitoring holes. In the related art, conventional soil drills or bulky diesel drilling rigs are used to drill holes for loose sediments, which is time-consuming, labor-intensive and inconvenient to move and operate.

[0053] In view of this, see Figure 1-Figure 7 In the embodiment of the first aspect of the present invention, a loose sediment 200 drilling device 100 is provided, comprising a first tube body 110, a second tube body 120 and a stirring part 130. According to different use requirements, the loose sediment 200 can be any suitable material, and the sediment 200 can be located in a loose or soft and sticky geological environment, such as a coastal area, a river or lake wetland, etc.

[0054] For details, see Figure 1 or Figure 2, the second tube body 120 is arranged through the first tube body 110. The second tube body 120 has a first opening 121 at the end close to the sediment 200. It can be understood that the inner cavity of the first tube body 110 can be passed through by the second tube body 120, and can provide a certain operating space. In some embodiments, the first tube body 110 can also be used to prevent the sediment 200 outside the first tube body 110 from collapsing, that is, it plays the role of drilling wall protection. In addition, the first tube body 110 can also be used for drilling. At this time, according to the use requirements, the first tube body 110 can be provided with a drilling structure, or the drilling operation can be realized only by the downward extension of the first tube body 110. For the structure of the first tube body 110 and the second tube body 120, the cross-section of the first tube body 110 (or the second tube body 120) can be any suitable shape such as circular, elliptical, rectangular, etc., and can be extended in a straight line or in a curve.

[0055] See also Figure 1 or Figure 2 , the stirring part 130 is configured to be rotatable to stir the surrounding sediment 200. Therefore, in some embodiments, the stirring part 130 may include a rotatable fan blade. As for the connection mode of the stirring part 130, in the first embodiment, the stirring part 130 is connected to the end, and the second tube body 120 can rotate together with the stirring part 130; in the second embodiment, the stirring part 130 is inserted into the second tube body 120 and passes through the first opening 121. It can be understood that, similar to the first embodiment, the stirring part 130 in the second embodiment can also be located at the end and has a similar effect. Comparing the connection settings of the two embodiments, the setting of the first embodiment can improve the integration of the drilling device 100 and make the operation more convenient; the setting of the second embodiment does not limit the specific position of the stirring part 130, so as to adjust the direction or extension distance of the stirring part 130 according to needs. It can be understood that, since the end (first opening 121) of the second tube body 120 is closer to the sediment 200, connecting the stirring part 130 to the end (or passing through the first opening 121) can facilitate the stirring part 130 to efficiently stir the sediment 200, thereby avoiding interference of the sediment 200 with the drilling operation or facilitating sampling of the sediment 200. Regarding the above-mentioned effect, specifically, on the one hand, the sediment 200 accumulated at the bottom is easy to interfere with the drilling operation, which is not conducive to efficient drilling. On the other hand, when it is necessary to sample the sediment 200, stirring the sediment 200 to a floating state is more convenient for the sampling operation of the sampling device.

[0056] According to the combination of the above embodiments, it can be seen that the loose sediment 200 drilling device 100 of the present invention includes a first tube body 110, a second tube body 120 and an agitating portion 130. The second tube body 120 is inserted into the first tube body 110, and the end of the second tube body 120 close to the sediment 200 has a first opening 121. The agitating portion 130 is configured to be rotatable to agitate the surrounding sediment 200, and the agitating portion 130 is connected to the end or inserted into the second tube body 120 and passes through the first opening 121. According to the above arrangement, the inner cavity of the first tube body 110 can be used for the second tube body 120 to pass through, and a certain operating space can be provided. In addition, the first tube body 110 can also be used to prevent the sediment 200 outside the first tube body 110 from collapsing or for drilling. In addition, liquid can be introduced into the inner cavity of the second tube body 120, and the sediment 200 can be stirred under the action of the stirring part 130 to avoid the sediment 200 from interfering with the drilling operation or to facilitate sampling of the sediment 200. Therefore, the drilling device 100 of the present invention can improve the drilling and sampling efficiency of loose sediments 200.

[0057] See also Figure 1 or Figure 2 In some embodiments, the axis of the first opening 121 is the first axis 1211, and the rotation axis of the stirring part 130 can be parallel to the first axis 1211 of the first opening 121. It can be understood that the direction of the first axis 1211 of the first opening 121 can correspond to the downward extension direction of the drilling device 100. Therefore, the rotation axis of the stirring part 130 is parallel to the first axis 1211 of the first opening 121, which can make the stirring part 130 stir the sediment 200 around the drilling position more evenly. When the first tube body 110 or the second tube body 120 is also used to extract the sediment 200, the above-mentioned setting can also improve the uniformity of extracting the sediment 200. In addition, in some embodiments, the direction of the rotation axis of the stirring part 130 can be changed according to needs, that is, the rotation axis of the stirring part 130 can cross the first axis 1211 of the first opening 121.

[0058] In order to further improve the stirring effect of the stirring part 130, in some embodiments, the stirring part 130 can be configured to vibrate to stir the surrounding sediment 200. Specifically, in some embodiments, the stirring part 130 can include a fan blade and a vibration motor connected to the fan blade, so that the vibration can be transmitted to the fan blade through the vibration motor, so that the fan blade can generate vibration while rotating. Among them, the vibration can be generated in any suitable form, for example, the vibration direction can be vertical or horizontal, and the vibration can be continuous or intermittent.

[0059] See also Figure 3 or Figure 4 or Figure 5 In some embodiments, the drilling device 100 may further include a liquid spraying unit 140. The liquid spraying unit 140 is adapted to radially spray liquid, and the liquid may be any suitable liquid such as water or cleaning liquid. Thus, the liquid spraying unit 140 may have a variety of structural forms, for example, Figure 3 In some embodiments, the outer peripheral wall of the liquid spraying portion 140 may have a plurality of liquid spraying ports; or see Figure 4 or Figure 5 In other embodiments, the liquid spraying part 140 may include a plurality of nozzles distributed radially. The liquid sprayed by the liquid spraying part 140 can be used to loosen the soil for drilling operation, and can also be used to impact the sediment 200 and mix with the sediment 200 to form a suspension for sampling, and can also clean the sediment 200. The connection mode of the liquid spraying part 140 is similar to the two connection modes of the stirring part 130. In the first type of embodiment, the liquid spraying part 140 can be connected to the end. This type of setting can improve the integration of the drilling device 100 and make the operation more convenient. In the second type of embodiment, the liquid spraying part 140 can be inserted into the second tube body 120 and pass through the first opening 121. This type of setting does not limit the specific position of the liquid spraying part 140, so that the direction or extension distance of the liquid spraying part 140 can be adjusted according to needs. According to the above-mentioned embodiments, in order to achieve a better liquid spraying effect, the liquid spraying part 140 may include a pump device, a high-pressure water gun and other devices to provide water flow, and one end of the liquid spraying part used to spray liquid may be a shower head structure, or a spherical structure, or the same shape as the second tube body 120.

[0060] In some specific embodiments, the stirring portion 130 can be fixedly connected to the end of the second tube body 120, and the second tube body 120 can rotate together with the stirring portion 130. At this time, the above-mentioned first type of setting enables the liquid spraying portion 140 to be connected to the end, that is, the liquid spraying portion 140 can also rotate together with the stirring portion 130, so that the sprayed liquid can also have the tangential force brought by the rotation; the second type of setting enables the liquid spraying portion 140 to pass through the second tube body 120, that is, the liquid spraying process is not affected by the rotation action.

[0061] For the specific structure of the liquid spraying part 140, see Figure 4 or Figure 5In some embodiments, the liquid spraying part 140 may include a first extension part 141 and a plurality of second extension parts 142 connected to each other. Specifically, the first extension part 141 may be connected to the second tube body 120 or pass through the second tube body 120, and each second extension part 142 may extend radially along the first axis 1211 of the first opening 121, and be spaced around the first axis 1211. Thus, the liquid can be guided from the inner cavity of the first extension part 141 to the inner cavity of each second extension part 142, and can be sprayed radially, and this structure is conducive to the liquid spraying part 140 spraying high-pressure liquid.

[0062] To facilitate sampling of the sediment 200, see Figure 1-Figure 6 In some embodiments, the end of the first tube body 110 away from the sediment 200 may have a second opening 111. It can be understood that the second opening 111 is the opening of the end of the first tube body 110 close to the operator. The inner peripheral wall of the first tube body 110 and the outer peripheral wall of the second tube body 120 may define a liquid extraction cavity 150. In addition, see Figure 6 The drilling device 100 may further include a liquid extraction unit 160, which may be configured to extract the sediment 200 and the liquid into the liquid extraction chamber 150 and extract them from the second opening 111. The liquid may be the liquid introduced by the drilling device 100 or the groundwater around the drilling location. According to the above functions, in some embodiments, the liquid extraction unit 160 may be a pump device, specifically a sediment pump; in other embodiments, the liquid extraction unit 160 may be a negative pressure suction device, which extracts the sediment 200 by forming a negative pressure in the liquid extraction chamber 150. The configuration of the above-mentioned embodiments can also facilitate the liquid extraction section 160 to efficiently obtain samples of the sediment 200, and make the obtained sediment 200 relatively clean. Specifically, the stirring section 130 can stir the sediment 200 so that a large amount of sediment 200 can float in the liquid to form a suspension, and the process of the liquid spraying section 140 spraying liquid can also clean the sediment 200, thereby saving the rinsing step and quickly obtaining the cleaned sediment 200 sample.

[0063] In addition, in some embodiments, a filter element may be provided in the liquid extraction chamber 150 to filter the extracted sediment 200, thereby eliminating the sample screening process after sampling, which is beneficial to improving the efficiency of sample analysis. The filter element may be a filter screen, filter paper, etc., and the aperture and mesh number may be designed according to requirements.

[0064] See also Figure 7In some embodiments, the drilling device 100 further includes a sleeve 170. The sleeve 170 can be sleeved on the first tube body 110, the second tube body 120 and the stirring part 130. As for the structure of the sleeve 170, according to the requirements, the sleeve 170 can be made of PVC or other suitable materials, and the cross-section of the sleeve 170 can be any suitable shape such as circular, elliptical, rectangular, etc., and the sleeve 170 can extend in a straight line or in a curve. As for the function of the sleeve 170, in some embodiments, the sleeve 170 can be used to prevent the sediment 200 outside the first tube body 110 from collapsing, that is, it plays the role of drilling wall protection. In addition, the sleeve 170 can also be used for drilling.

[0065] In addition, based on the arrangement of the sleeve 170, combined with the liquid extraction unit 160 arranged in the above-mentioned embodiment, the gap between the sleeve 170 and the first tube body 110 can also be used to extract the sediment 200, that is, in some embodiments, see Figure 7 , the inner circumferential wall of the sleeve 170 and the outer circumferential wall of the first tube body 110 can also define a liquid extraction chamber 150, and the arrangement of the above-mentioned embodiment can also be referred to to extract the sediment 200. In particular, when the inner circumferential wall of the first tube body 110 and the outer circumferential wall of the second tube body 120, and the inner circumferential wall of the sleeve 170 and the outer circumferential wall of the first tube body 110, the two parts define the liquid extraction chamber 150, according to the plane distribution of the suspension, the liquid extraction power (or the flow rate of the extracted suspension) in the two liquid extraction chambers 150 can be different, that is, the extraction effect of the liquid extraction part 160 on each liquid extraction chamber 150 can be different. Specifically, when the suspension or sediment 200 is more concentrated in the central area of ​​the borehole (i.e., the area close to the axis of the second tube body 120), the pumping power in the pumping cavity 150 defined by the inner circumferential wall of the first tube body 110 and the outer circumferential wall of the second tube body 120 can be greater than the pumping power in the pumping cavity 150 defined by the inner circumferential wall of the sleeve 170 and the outer circumferential wall of the first tube body 110. This arrangement can make the extraction action more targeted at areas where the suspension or sediment 200 is more concentrated, and the sampling efficiency is higher.

[0066] See also Figure 1-Figure 10 The second aspect of the present invention further provides a drilling method, which uses the drilling device 100 of any of the above embodiments. Figure 8 The drilling method may include but is not limited to the following steps:

[0067] S101: inserting the drilling device 100 into the sediment 200;

[0068] S102: introducing liquid into the second tube body 120;

[0069] S103: Control the stirring unit 130 to stir the surrounding sediment 200;

[0070] S104: extracting the sediment 200.

[0071] The above steps are further explained below. In actual usage scenarios, the drilling device 100 may also be inserted into the geological layer on the surface first, and only reach the geological layer with sediment 200 when it extends to a certain depth. For ease of description, the present invention uses the embodiments of the drilling device 100 as an illustration, and different embodiments may be combined with each other between different technical solutions. In some embodiments, the drilling device 100 may be fully inserted into the sediment 200. Considering the convenience of operation and sampling, in some embodiments, the drilling device 100 may be partially inserted into the sediment 200. In addition, in the step of introducing liquid, the liquid spraying part 140 in the above embodiment may be used to provide liquid, or the liquid may be directly poured into the second tube 120. In the above steps, the order of S102~S104 is not limited, and they may be performed simultaneously.

[0072] In some embodiments, the step of inserting the drilling device 100 into the sediment 200 may specifically include:

[0073] Inserting the drilling device 100 to multiple depth positions in sequence;

[0074] Corresponding to the above steps, in some embodiments, the step of extracting the sediment 200 may specifically include:

[0075] Sediment 200 around each depth position is extracted sequentially.

[0076] The above steps are further described below. The multiple depth positions in the above steps may correspond to the multiple depth positions of the sediment 200 that need to be sampled, and the distance between the depth positions may be determined according to the requirements. In addition, extracting the sediment 200 at each position means sampling the sediment 200 at different depths, and after the liquid is introduced, the liquid may be mixed with the sediment 200 to form a turbid mixed liquid, so that the step of extracting the sediment 200 may specifically be extracting the mixed liquid formed by the sediment 200, and then the sediment 200 may be obtained by filtering, screening, and the like.

[0077] In addition, the sleeve 170 in the above embodiment can also be applied to the present drilling method. Specifically, based on the sleeve 170 defined in the above embodiment, in some embodiments, the sleeve 170 can be first combined with the first tube body 110, the second tube body 120 and the stirring part 130, and then the integrated drilling device 100 can be inserted into the sediment 200 together. In other embodiments, the sleeve 170 can be first inserted into the sediment 200, and when it reaches a certain depth, the other components can be extended into the sleeve 170. In addition, in order to facilitate the direct well formation after drilling, or to facilitate the detection of groundwater, the sleeve 170 can also be used to introduce groundwater. Specifically, see Figure 7 In some embodiments, the sleeve 170 has a liquid guide hole 171. After the step of extracting the sediment 200, the drilling method may further include:

[0078] The groundwater outside the sleeve 170 is introduced into the sleeve 170 through the liquid guide hole 171 .

[0079] The following is a further explanation of the above steps. Figure 7 In the first embodiment of this step, the sleeve 170 can serve as the outermost protective wall of the drilling device 100. Based on the setting of the liquid guide hole 171, during the drilling process, groundwater can be simultaneously introduced into the inner cavity of the sleeve 170, or the liquid guide hole 171 can be blocked by a diaphragm or a mechanical structure during the drilling process, and groundwater can be introduced after the drilling is completed (or the sediment 200 is extracted).

[0080] For the second embodiment of this step, the drilling device 100 may also include an outer layer cylinder, which may be sleeved on the first tube body 110, the second tube body 120, the stirring part 130 and the sleeve 170, and may play the role of drilling wall protection or drilling. Therefore, the shape and structure of the outer layer cylinder may refer to the shape and structure of the sleeve 170 described in the above embodiment, and will not be repeated here. At this time, the sleeve 170 may only be used to introduce groundwater. Therefore, thanks to the setting of the two-layer cylinder, during the drilling process, the outer layer cylinder may be relied on to play the role of wall protection or drilling, avoiding the situation that when there is only one layer of cylinder, the liquid guide hole 171 of the sleeve 170 further affects the structural strength of the sleeve 170 and further affects the above-mentioned effect. Corresponding to this embodiment, the step of guiding the groundwater outside the sleeve 170 from the liquid guide hole 171 to the inner cavity of the sleeve 170 may specifically include:

[0081] Before drilling or after drilling is completed, the water-permeable cylinder is inserted into the sleeve 170 and sleeved on the first tube body 110, the second tube body 120 and the stirring part 130;

[0082] Pull out the sleeve 170;

[0083] The groundwater outside the water-permeable cylinder is guided into the inner cavity of the sleeve 170 through the liquid guide hole 171 .

[0084] For ease of understanding, the following describes a relatively complete embodiment of the present invention corresponding to the drilling method, see Figure 9-10 The drilling method may include but is not limited to the following steps:

[0085] S201: inserting the drilling device 100 to multiple depth positions in sequence;

[0086] S202: introducing liquid into the second tube body 120;

[0087] S203: Control the stirring unit 130 to stir the surrounding sediment 200;

[0088] S204: Sequentially extracting sediments 200 around each depth position;

[0089] S205: inserting the water-permeable cylinder into the sleeve 170 and sleeved the first tube 110, the second tube 120 and the stirring part 130;

[0090] S206: Pull out the sleeve 170;

[0091] S207: Guide the groundwater outside the water-permeable cylinder into the sleeve 170 through the liquid guide hole 171.

[0092] In the above steps, the order of S202 to S205 is not limited and they can be performed simultaneously.

[0093] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A loose sediment drilling device, characterized in that: include: first tube body; A second tube body is inserted through the first tube body, and an end of the second tube body close to the sediment has a first opening; a stirring portion configured to rotate to stir surrounding sediments, the stirring portion being connected to the end portion and to the outer periphery of the second tube body, and a rotation axis of the stirring portion being parallel to an axis of the first opening; The liquid spraying portion is suitable for spraying liquid radially. The liquid spraying portion is connected to the end portion or is penetrated through the second tube body and passes through the first opening. The axis of the first opening is the first axis. Along the radial direction of the first axis, the liquid outlet of the liquid spraying portion is located between the first axis and the end of the stirring portion away from the first axis.

2. The drilling device according to claim 1, characterized in that: The stirring portion is configured to be able to vibrate to stir the sediment around it.

3. The drilling device according to claim 1, characterized in that: The liquid spraying part includes a first extension part and a plurality of second extension parts connected to each other, the first extension part is connected to the second tube body or penetrates the second tube body, and each of the second extension parts extends radially along the first axis and is spaced apart around the first axis.

4. The drilling device according to claim 1, characterized in that: The first tube body has a second opening at one end away from the sediment, and a liquid extraction cavity is defined between the inner circumferential wall of the first tube body and the outer circumferential wall of the second tube body. The drilling device also includes a liquid extraction part, which is configured to extract the sediment and liquid into the liquid extraction cavity and extract them out from the second opening.

5. The drilling device according to claim 1, characterized in that: The drilling device further includes a sleeve, which is sleeved on the first tube body, the second tube body and the stirring part.

6. A method for drilling a loose sediment, using the drilling device according to any one of claims 1 to 5, characterized in that: The drilling method comprises: inserting the drilling device into the sediment; Passing liquid into the second tube; Controlling the stirring part to stir the surrounding sediment; The sediment is extracted.

7. The drilling method according to claim 6, characterized in that: The step of inserting the drilling device into the sediment specifically comprises: inserting the drilling device to multiple depth positions in sequence; The step of extracting the sediment and liquid specifically includes: The sediments around each of the depth positions are extracted sequentially.

8. The drilling method according to claim 6, characterized in that: The drilling device further includes a sleeve, which is sleeved on the first tube body, the second tube body and the stirring part, and has a liquid guide hole. After the step of extracting the sediment, the drilling method further includes: The groundwater outside the sleeve is introduced into the sleeve through the liquid guide hole.

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