Drilling equipment and drilling process suitable for gravel-cobble stratum

Abstract

The invention discloses drilling equipment and a drilling process suitable for a gravel-cobble stratum, and relates to the technical field of drilling. The drilling equipment comprises a material storage barrel, and a storage cavity is formed in the material storage barrel; the feeding part is in threaded connection with the lower end of the material storage barrel, and the feeding part is used for storing a drilled soil layer in the material storage barrel; the feeding part comprises a first connecting sleeve, the first connecting sleeve is in threaded connection with the lower end of the storage barrel, the first connecting sleeve is provided with a feeding port, and the feeding port communicates with the storage cavity; the opening and closing plate is rotationally arranged at the feeding opening through a rotating piece; the upper end of the first rock breaker is in threaded connection with the lower end of the first connecting sleeve, and the first rock breaker is used for breaking rock soil; the opening and closing plates and the rotating pieces are arranged in a one-to-one correspondence mode. The drilling device has the effect of improving the drilling efficiency.

Description

Technical Field

[0001] The present application relates to the field of drilling technology, and in particular to a drilling device and a drilling process suitable for gravel formations. Background Art

[0002] The geological characteristics of the gravel layer make drilling complicated. The gravel layer usually has complex structure, irregular particle size distribution, hard and loose texture, and uneven hardness. These characteristics make it difficult to take core samples during drilling, and are prone to leakage and collapse.

[0003] A related drilling equipment generally uses a long spiral drill to drill and mix, and finally forms a cast-in-place pile by pouring cement slurry into the center hole of the drill rod and the drill tool, and adding a steel cage into the pre-drilled hole.

[0004] However, when drilling in harder geological formations such as gravel layers and various weathered rock formations, problems such as rapid wear of the drill bit and low drilling efficiency may occur, resulting in large settlement after drilling and piling, affecting construction quality and significantly increasing project costs. Summary of the invention

[0005] In order to improve the drilling efficiency, the present application provides a drilling device and a drilling process suitable for gravel formations.

[0006] The present application provides a drilling device and a drilling process suitable for gravel formations, which adopts the following technical solutions: A drilling device and drilling process suitable for gravel formations, comprising: A material storage barrel, wherein a storage cavity is provided in the material storage barrel; A feeding piece, the feeding piece is threadedly connected to the lower end of the storage barrel, and the feeding piece is used to store the drilled soil layer in the storage barrel; The feed member comprises: A first connecting sleeve, the first connecting sleeve is connected to the lower end of the storage barrel through a thread, the first connecting sleeve is provided with a feed port, and the feed port is communicated with the storage chamber; An opening and closing plate, the opening and closing plate is rotatably arranged at the feed inlet through a rotating member; a first rock breaker, the upper end of which is threadedly connected to the lower end of the first connecting sleeve, and is used to break rock and soil; Wherein, the opening and closing plates are arranged in one-to-one correspondence with the rotating parts.

[0007] By adopting the above technical solution and using the first rock breaker, the rock and soil in the gravel layer can be directly and effectively broken. The cooperation between the storage barrel and the feed piece allows the drilled soil layer to be stably stored in the storage barrel during the drilling process, thereby accelerating the drilling speed and further improving the drilling efficiency.

[0008] Optionally, the opening and closing plate is a single plate or is formed by splicing four plates.

[0009] By adopting the above technical solution, when drilling, the soil sample will push the opening and closing plate upwards, so that the feed port is opened, and then the soil sample can enter the storage barrel, thereby ensuring the continuity of drilling, helping to reduce the time loss caused by frequent shutdowns to clean soil, and thus improving drilling efficiency.

[0010] Optionally, the first rock breaker includes: A second connecting sleeve, the upper end of the second connecting sleeve being threadedly connected to the lower end of the first connecting sleeve; An annular rock-breaking tooth, the upper end of which is fixedly arranged on the lower end of the second connecting sleeve.

[0011] By adopting the above technical solution, the second connecting sleeve is connected to the first connecting sleeve, so that the stability can be improved during the rotation process. At the same time, the annular rock breaker can efficiently crush the rocks in the gravel formation. Due to the shape and distribution of the annular rock breaker teeth, it can provide a more uniform and powerful crushing force, thereby accelerating the drilling speed and improving the drilling efficiency.

[0012] Optionally, the rotating member is a hinge.

[0013] By adopting the above technical solution, the setting of the hinge can make the opening and closing of the door more convenient and quick.

[0014] The present application also provides a drilling process based on a gravel formation drilling device, comprising: S1, determine whether the soil sample can be self-sustaining in the drilling tool; S2, if the soil sample can be self-sustaining in the drill bit, use the first drill bit assembly to drill; S3, if the soil sample cannot be self-sustaining in the drill bit, use the second drill bit assembly to drill; S4, if the diameter of the gravel is between 6-20 mm, use the third drilling tool assembly for drilling.

[0015] By adopting the above technical solution, different formations and soil sample properties require different drill tool combinations to adapt. By judging whether the soil sample can be self-sustaining in the drill tool and the diameter of the gravel, the most suitable drill tool combination can be selected for drilling, thereby improving the drilling efficiency and sampling quality. For self-sustaining soil samples, the first drill tool combination is used for drilling, which can ensure the integrity and representativeness of the soil sample and reduce the disturbance and distortion of the soil sample during the drilling process. For soil samples that cannot be self-sustaining or gravel of a specific size, the second or third drill tool combination is used for drilling, which can solve the problems in the drilling process in a targeted manner, thereby improving the drilling efficiency.

[0016] Optionally, the first drilling tool assembly includes: The material storage barrel+the first rock breaker.

[0017] By adopting the above technical solution, the first rock breaker can efficiently break the rock and soil in the formation, and the setting of the storage barrel can ensure the rapid collection of soil samples during the drilling process, thereby improving the drilling efficiency.

[0018] Optionally, the second drilling tool assembly includes: The material storage barrel+the material feeding member+the first rock breaker; Wherein, the opening and closing plate in the feeding member is a single plate.

[0019] By adopting the above technical solution, the separate setting of the opening and closing plate makes the structure of the feed piece simpler, simplifies the overall structure of the drill bit assembly, and at the same time, can more accurately control the entry of soil materials, so that the first rock breaker is not hindered during drilling, thereby improving the drilling efficiency.

[0020] Optionally, the third drilling tool assembly includes: The material storage barrel+the material feeding member+the first rock breaker; Among them, the opening and closing plate in the feeding piece is composed of 4 plates spliced ​​together.

[0021] By adopting the above technical solution, since the opening and closing plate is composed of multiple plates, greater flexibility can be provided. By adjusting the splicing angle and position of each plate, the entry and discharge of soil can be more accurately controlled to meet the needs of different drilling conditions and formations and improve drilling efficiency.

[0022] In summary, the embodiments of the present invention provide a drilling device and a drilling process suitable for gravel formations, which include at least one of the following beneficial technical effects: 1. By using the first rock breaker, the rock and soil in the gravel layer can be directly and effectively broken. The cooperation between the storage barrel and the feed piece can stably store the drilled soil layer in the storage barrel during the drilling process, thereby accelerating the drilling speed and further improving the drilling efficiency.

[0023] 2. The second connecting sleeve is connected to the first connecting sleeve, so that the stability can be improved during the rotation process. At the same time, the annular rock breaker can efficiently crush the rocks in the gravel formation. Due to the shape and distribution of the annular rock breaker teeth, it can provide a more uniform and powerful crushing force, thereby accelerating the drilling speed and improving the drilling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a drilling device suitable for gravel formations provided by an embodiment of the present invention; Figure 2 A schematic diagram of the structure of an opening and closing plate provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of another opening and closing plate provided in an embodiment of the present invention; Figure 4 for Figure 3 A magnified view of part A; Figure 5 A schematic structural diagram of a "straight" drill bit rock breaker provided in an embodiment of the present invention.

[0025] Description of the symbols in the figure: 11. Material storage barrel; 12. First connecting sleeve; 13. Opening and closing plate; 14. Material feed port; 15. Hinge; 16. Storage chamber; 17. "I"-shaped drill head rock breaker; 2. First rock breaker; 21. Second connecting sleeve; 22. Annular rock breaker teeth; 3. Limiting piece; 31. Triangular plate; 32. Connecting column; 33. Rotating block; 34. Matching groove; 35. Installation groove. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-5 This application is described in further detail.

[0027] An embodiment of the present application provides a drilling device suitable for gravel formations.

[0028] Combination Figure 1 , Figure 2 and Figure 3 The embodiment of the present application discloses a drilling equipment suitable for gravel formations, including a storage barrel 11 provided with a storage chamber 16, a feed piece, and a first rock breaker 2, wherein a first connecting sleeve 12 is threadedly connected to the lower end of the storage barrel 11, and the first connecting sleeve 12 is provided with a feed port 14, and the feed port 14 is connected to the storage chamber 16; an opening and closing plate 13 is rotatably arranged at the feed port 14 through a rotating piece; the upper end of the first rock breaker 2 is threadedly connected to the lower end of the first connecting sleeve 12, and is used to crush rock and soil; wherein the opening and closing plate 13 is arranged one-to-one with the rotating piece.

[0029] In the embodiment of the present application, the first connecting sleeve 12 is rotatably connected to the lower end of the storage barrel 11, and then the first rock breaker 2 is connected to the lower end of the first connecting sleeve 12, and then the gravel layer is drilled. The function of the first rock breaker 2 is to continuously drill into the gravel layer and break the gravel layer. Then the broken soil sample pushes the opening and closing plate 13 to one end of the storage barrel 11, and then the feed port 14 is opened, so that the soil sample enters the storage barrel 11, which can maintain the self-sustaining behavior of the soil material and prevent the soil sample from affecting the drilling efficiency. It should be noted that the lower end of the storage barrel 11 is provided with an external thread, and the upper end of the first connecting sleeve 12 is provided with an internal thread, so that the first connecting sleeve 12 and the storage barrel 11 can be quickly connected, while saving money; the lower end of the first connecting sleeve 12 is provided with an external thread, and the upper end of the first rock breaker 2 is provided with an internal thread, so that the first connecting barrel and the first rock breaker 2 can be quickly connected.

[0030] Specifically, the first rock breaker 2 includes a second connecting sleeve 21 and an annular rock breaker tooth 22. The upper end of the second connecting sleeve 21 is threadedly connected to the lower end of the first connecting sleeve 12; the upper end of the annular rock breaker tooth 22 is fixedly arranged on the lower end of the second connecting sleeve 21.

[0031] In the embodiment of the present application, the portion where the second connecting sleeve 21 is connected to the first connecting sleeve 12 is provided with an internal thread, and the lower end of the first connecting sleeve 12 is provided with an external thread, which can realize the rapid fixation of the second connecting sleeve 21 and the first connecting sleeve 12. It should be noted that the lower end of the first rock breaker 2 is an annular tooth setting, and the setting of the annular teeth can increase the contact area between the teeth and the rock, thereby improving the crushing effect; the material of the annular teeth can be an alloy material. Since alloy materials usually have higher strength and toughness, they can effectively resist the impact and vibration in the rock breaking process and extend the service life of the annular teeth.

[0032] Combination Figure 2 and Figure 3 More specifically, the opening and closing plate 13 is a single plate or is formed by splicing four plates, and the rotating part is a hinge 15.

[0033] In the embodiment of the present application, when the opening and closing plate 13 is composed of four plates spliced ​​together, the specifications of the four plates are equal, that is, one plate is equally divided into four plates, and then the arc-shaped portion of each plate is rotatably connected to the first connecting sleeve 12 through a hinge 15. In other words, each plate corresponds to a hinge 15, so that when drilling, the soil sample pushes the opening and closing plate 13 upward, and when the storage barrel 11 is lifted, the soil sample pushes the opening and closing plate 13 downward due to its own gravity, and then closes the feed port 14, thereby facilitating the storage of the soil sample.

[0034] Combination Figure 4 When the opening and closing plate 13 is a plate, a hinge 15 is provided on one side of the opening and closing plate 13, and a mounting groove 35 is provided on the other side. The opening and closing plate 13 is relatively fixed in position by the stopper 3, and the stopper 3 is provided on one side of the first connecting sleeve 12. The stopper 3 includes a triangular plate 31, a connecting column 32 and a rotating block 33. The stopper 3 is rotatably provided on one side of the first connecting sleeve. The first connecting sleeve 12 is provided with a matching groove 34 for the empty stopper 3 to rotate. The triangular plate 31 is provided on the inner side of the first connecting sleeve 12. The triangular plate 31, the connecting column 32 and the rotating block 33 are welded in sequence. The rotating block 33 is rotatably provided on the outer side of the first connecting sleeve 12. When in use, before drilling, the rotating block 33 is rotated so that the triangular plate 31 is parallel to the opening and closing plate 13, that is, the upper side of the triangular plate 31 conflicts with the lower side of the opening and closing plate 13, and the triangular plate 31 provides an upward force for the opening and closing plate 13, thereby preventing the opening and closing plate 13 from rotating downward, so that during drilling, the soil pushes the closing plate upward, and then the soil enters the storage barrel 11. When the storage barrel 11 is lifted upward, the soil will drive the closing plate downward due to its own gravity and conflict with the triangular plate 31, thereby facilitating the transportation of the soil; when the soil needs to be poured out of the storage barrel 11, the rotating block 33 is rotated so that the rotating block 33 drives the triangular plate 31 to rotate, and then when the rotating plate rotates 90 degrees, the triangular plate 31 is vertically arranged in the mounting groove 35, that is, the triangular plate 31 is perpendicular to the mounting groove 35, so that the triangular plate 31 cannot provide an upward force for the opening and closing plate 13; that is, the triangular plate 31 cannot support the opening and closing plate 13. Thereby, the opening and closing plate 13 is rotated downward, thereby opening the feed port 14, and the soil material can be discharged through the feed port 14, which is simple and convenient.

[0035] An embodiment of the present application provides a drilling process based on gravel formation drilling equipment.

[0036] A drilling process based on a gravel formation drilling device comprises the following construction steps: S1, determine whether the soil sample can be self-sustaining in the drill tool; observe whether there are many cracks in the soil layer during the drilling process. If many cracks are found in the soil layer, it means that the soil layer being drilled is soft and may not have good self-sustaining ability. If the drilled soil layer is solid and has no cracks, it may be a bearing layer, and the self-sustaining ability of the soil sample in the drill tool may be better; you can also use a soil sample strength tester to test the strength of the soil layer taken. The strength test can indirectly determine whether the soil sample can be self-sustaining in the drill tool. Soil layers with higher strength usually have better self-sustaining ability. The method for judging the self-sustaining ability of a soil sample is selected according to the specific usage situation, and the embodiments of the present application do not make specific limitations.

[0037] S2, if the soil sample can be self-sustaining in the drilling tool, use the first drilling tool assembly to drill; the first drilling tool assembly includes: the material storage barrel 11 + the first rock breaker 2.

[0038] The soil sample is able to be self-sustaining, which means that the soil sample has a high internal friction angle and cohesion, so that the soil sample can maintain its shape and stability in the storage barrel 11. The storage barrel 11 can effectively grab and remove the gravel and soil in the borehole, and the first rock breaker 2 has annular rock breaking teeth 22. Therefore, it can effectively break the rock during drilling. Its shape and material design are to maximize the crushing effect and efficiency. During the drilling process, the annular rock breaking teeth 22 apply pressure and rotational force to crack and break the rock, thereby promoting the drilling process. The crushing effect of the annular rock breaking teeth 22 can reduce the resistance encountered during the drilling process, making the drilling process smoother. Thereby improving the drilling efficiency.

[0039] S3, if the soil sample cannot be self-sustaining in the drilling tool, use a second drilling tool assembly for drilling; the second drilling tool assembly includes: the storage barrel 11+the feed piece+the first rock breaker 2; wherein the opening and closing plate 13 in the feed piece is a single plate.

[0040] S4, if the diameter of the gravel is between 6-20 mm, use the third drilling tool assembly for drilling. The third drilling tool assembly includes: the storage barrel 11 + the feeder + the first rock breaker 2; wherein the opening and closing plate 13 in the feeder is composed of four plates spliced ​​together.

[0041] In the embodiment of the present application, the opening and closing plate 13 in the feed piece is set as a single plate, and the feed speed and feed angle can be adjusted according to different strata and drilling conditions during the drilling process to ensure the smooth progress of the drilling process. The opening and closing plate 13 in the feed piece is composed of four plates, which can adapt to complex geological conditions. During the drilling process, when encountering strata with different hardness and density, the four plates can adapt to the changes in the strata by adjusting the opening and closing degree of their petals, thereby maintaining drilling efficiency and stability. At the same time, it can also reduce the resistance during the drilling process.

[0042] Among them, in the shallow loose gravel stratum, when the gravel diameter is small or there is a lot of fine-grained soil filling and the soil can be self-sustaining in the drill bit, the storage barrel 11+the first rock breaker 2 is used to directly take out the crushed stone soil in the hole; when the soil cannot be self-sustaining in the drill bit, the storage barrel 11+the feed piece with a start-and-stop plate 13+the first rock breaker 2 is used to drill for soil extraction; when the particle size is large, the storage barrel 11+the feed piece with four start-and-stop plates 13+the first rock breaker 2 is used to drill and extract soil; in case of gravel (crushed) stones with a maximum particle size of 6~20mm, first use the "straight" drill head rock breaker 17 to crush them, such as Figure 5As shown, then switch back to the combination of "storage barrel 11 + feeder with 4 opening and closing plates 13 + first rock breaker 2" to continue impact soil drilling. In case of 20~60cm floating (block) stones, first use gravel crushing bombs to blast them in the hole, then switch to the "straight" drill head rock breaker 17 to further crush them, and then switch back to the combination of "storage barrel 11 + feeder with 4 opening and closing plates 13 + first rock breaker 2" to continue impact soil drilling. In case of boulders larger than 60cm, first use the combination of "storage barrel 11 + feeder with 4 opening and closing plates 13 + first rock breaker 2" to drill to the surface of the boulders and repeatedly remove the loose gravel, while repeatedly hitting the casing combination to the bottom wall of the hole, and then switch to the combination of "core tube + diamond coring drill bit", and perform water rotary drilling; after drilling through the boulders, follow with a smaller casing combination, and switch to a smaller caliber impact drill tool combination to continue drilling. When rotary drilling, low pressure, high speed and large pumping volume should be used. If the pressure is too high, the drill bit will easily drive the boulder to rotate, reducing the rock breaking efficiency and affecting drilling. Large pumping volume can wash away the rock powder in time to avoid excessive wear on the drill bit. At this time, it is best to use a diamond-impregnated drill bit. The matrix concentration should be selected according to the rock properties of the boulder. High concentration is selected for hard rock and low concentration is selected for soft rock.

[0043] In the deeper and denser gravel formation, the drilling method of using impact drill combination and casing combination to follow up the wall protection is used. However, the distance between the casing and the bottom of the hole should be appropriately increased (such as 1.5-2.0m), so that the gravel that is tightly bitten between the bottom of the hole and the bottom of the casing shoe can be loosened and collapsed into the bottom of the hole under the action of impact vibration for a long time, so as to facilitate the follow-up of the casing and the removal after completion. If the depth is too large and the casing continues to follow up and cannot be advanced, the combination of "core tube + diamond coring drill bit" can be used, and the mud wall protection rotary drilling is usually carried out with low pressure, high speed and large pump volume. If the pressure is too high, it is easy to cause problems such as core blockage and drill bit chipping. At this time, it is best to use an impregnated diamond drill bit for the drill bit, and the flushing fluid should use a high-viscosity mud with added vegetable gum to make full use of its good viscoelastic shock absorbing effect, which can effectively protect the diamond drill bit and avoid chipping; it can also effectively protect the hole wall, so as to facilitate subsequent in-hole testing. In case of serious local leakage, the drill should be lifted and a mixture of filler (straw powder, plant fiber, clay fragments, sandy soil, fine gravel soil) and mud should be pumped into the casing to use the fluidity of the mud to bring the filler to the pores to plug the leak. If sampling is required, a single-action double-tube drill should be used to minimize disturbance.

[0044] In gravel and crushed stone formations filled with sandy soil, the drilling method of impact drill combination and casing follow-up wall protection is adopted. The specific process is similar to the above two formations, but the distance between the casing shoe and the bottom of the hole should be appropriately shortened (such as 0.3~1m) depending on the content and density of the sandy soil to avoid excessive collapse of the hole wall and affect the drilling efficiency.

[0045] In the gravel formation with good cohesive filling, the percussion drilling tool combination is used directly for drilling. When encountering boulders, the combination of "core tube + diamond coring drill bit" is used, and the mud wall is used for rotary drilling. After drilling through the boulders, a smaller casing combination is inserted, and the percussion drilling tool combination with a smaller diameter is used to continue the percussive drilling. When rotary drilling, low pressure, high speed, and large pump volume should be used. Ordinary mud wall can be used. Depending on the content of cohesive filling, the mud weight should be smaller for those with high cohesive content, and vice versa. High-viscosity mud with added plant gum can also be used to protect the drill bit.

[0046] Among them, the "straight" drill bit rock breaker 17, the "core tube + diamond coring drill bit" combination, the casing combination, the impact drill tool combination, the impact drill tool combination, the "core tube + diamond coring drill bit" combination, and the gravel crushing bomb are all common knowledge known to those skilled in the art, so they will not be described in detail.

[0047] The implementation principle of the embodiment of the present application is as follows: determine whether the soil sample can be self-sustaining in the drilling tool. If the soil sample can be self-sustaining in the drilling tool, the first rock breaker 2 is threadedly connected to the storage barrel 11, and then drilling is performed, and the soil sample enters the storage barrel 11 during the drilling process; if the soil sample cannot be self-sustaining in the drilling tool, the feed piece is threadedly connected to the lower end of the storage barrel 11, and then the first rock breaker 2 is threadedly connected to the lower end of the feed piece, wherein the opening and closing plate 13 in the feed piece is a single plate. During the drilling process, the soil material pushes up the opening and closing plate 13 and then enters the storage barrel 11. When the storage barrel 11 is lifted, the soil material pushes the closing plate line down due to its own gravity and prevents the soil material from leaking out of the feed port 14. If the diameter of the gravel is between 6-20mm, the feed piece is threadedly connected to the lower end of the storage barrel 11, and then the first rock breaker 2 is threadedly connected to the lower end of the feed piece, wherein the opening and closing plate 13 in the feed piece is composed of four plates spliced ​​together. During the drilling process, the soil material pushes up the opening and closing plate 13 and then enters the storage barrel 11. Since the opening and closing plate 13 is composed of four plates spliced ​​together, the four plates can adapt to the changes in the formation by adjusting the opening and closing degree of their petals, thereby maintaining drilling efficiency and stability. At the same time, it can also reduce the resistance during the drilling process.

[0048] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A drilling device suitable for gravel formations, characterized in that: include: A material storage barrel (11), wherein a storage chamber (16) is provided in the material storage barrel (11); A feeding piece, the feeding piece being threadably connected to the lower end of the material storage barrel (11), the feeding piece being used to store the drilled soil layer in the material storage barrel (11); The feed member comprises: a first connecting sleeve (12), the first connecting sleeve (12) being threadably connected to the lower end of the material storage barrel (11), the first connecting sleeve (12) being provided with a material feed port (14), the material feed port (14) being in communication with the storage chamber (16); An opening and closing plate (13), the opening and closing plate (13) being rotatably disposed at the feed inlet (14) via a rotating member; a first rock breaker (2), the upper end of the first rock breaker (2) being threadedly connected to the lower end of the first connecting sleeve (12), and being used for breaking rock and soil; Wherein, the opening and closing plates (13) are arranged in one-to-one correspondence with the rotating parts.

2. The drilling equipment suitable for gravel formation according to claim 1 is characterized in that: The opening and closing plate (13) is a single plate or the opening and closing plate (13) is formed by splicing four plates.

3. The drilling equipment suitable for gravel formation according to claim 1 is characterized by: The first rock breaker (2) comprises: a second connecting sleeve (21), the upper end of the second connecting sleeve (21) being threadedly connected to the lower end of the first connecting sleeve (12); An annular rock breaking tooth (22), wherein the upper end of the annular rock breaking tooth (22) is fixedly arranged on the lower end of the second connecting sleeve (21).

4. The drilling equipment suitable for gravel formation according to claim 1, characterized in that: The rotating part is a hinge (15).

5. A drilling process based on a gravel formation drilling device, based on the drilling device according to any one of claims 1 to 4, characterized in that: include: S1, determine whether the soil sample can be self-sustaining in the drilling tool; S2, if the soil sample can be self-sustaining in the drill bit, use the first drill bit assembly to drill; S3, if the soil sample cannot be self-sustaining in the drill bit, use the second drill bit assembly to drill; S4, if the diameter of the gravel is between 6-20 mm, use the third drilling tool assembly for drilling.

6. A drilling process based on gravel formation drilling equipment according to claim 5, characterized in that: The first drilling tool assembly comprises: The material storage barrel (11)+the first rock breaker (2).

7. The drilling process based on gravel formation drilling equipment according to claim 5 is characterized in that: The second drilling tool assembly comprises: The material storage barrel (11) + the material feeding member + the first rock breaker (2); Wherein, the opening and closing plate (13) in the feed member is a single plate.

8. The drilling process based on gravel formation drilling equipment according to claim 5 is characterized in that: The third drilling tool assembly comprises: The material storage barrel (11) + the material feeding member + the first rock breaker (2); Wherein, the opening and closing plate (13) in the feed piece is formed by splicing four plates.

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