Low-clearance rock stratum drilling construction device and method thereof

Abstract

The present application relates to a kind of low clearance rock stratum drilling construction device and method thereof.The low clearance rock stratum drilling construction device includes: rotary drilling rig is arranged in rack, the rotary drilling rig top surface is left with material removal space between the rack, the rack is provided with crane and first material remover, the first material remover is located in the material removal space, the crane drives the first material remover, so that first material remover passes through the through hole and clamps and hoists fractured core;Full casing is driven by the rotary drilling rig, including drill pipe group composed of several first drill pipe axially spliced, and the second drill pipe axially connected with the bottom of the drill pipe group, the second drill pipe is provided with splitting rod for side top core and makes it fracture;Down-the-hole hammer is axially connected with the second drill pipe, for annular cutting rock formation, forms columnar core.The low clearance rock stratum drilling construction device and method thereof have the advantages of high efficiency and high safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling construction, in particular to a low-clearance rock stratum drilling construction device and method thereof. BACKGROUND

[0002] In the process of subway construction, if a rock stratum with high hardness is encountered, a large drilling machine needs to be used for construction. However, the environment of subway construction is complex and diverse, and sometimes vertical drilling needs to be carried out in a low-clearance environment. The limitation of the environment makes it difficult for a large drilling machine to enter the construction site, and large equipment cannot be used for drilling. At present, in this environment, artificial pneumatic picks or water mills are often used for pile body excavation. The pile body is excavated layer by layer, and the footage is not more than 1.0 m per cycle. Within the range of 5 meters of excavation depth, the well wall needs to be protected layer by layer every cycle. After the well wall is poured and the concrete reaches a certain strength after 24 hours, the next cycle of central part excavation can be carried out, so as to prevent collapse. The spoil in the excavation process is lifted to the well mouth by a hoist, and then transported by a trolley and a dump truck, and finally lifted to the ground by a bridge crane. This construction method can be used for construction in an environment with limited height, but the energy consumption is large. When the shaft is excavated to a certain depth, the air in the shaft is turbid, which makes the construction personnel feel uncomfortable, and ventilation equipment and toxic and harmful gas detection equipment need to be provided. At the same time, the construction personnel are at a certain height difference from the outside of the shaft, and if foreign matter falls into the shaft, it is easy to cause serious injury to the construction personnel. Therefore, an automatic equipment is still needed to replace manual work in the shaft to improve safety and construction efficiency. SUMMARY

[0003] Therefore, the present application aims to provide a low-clearance rock stratum drilling construction device and method thereof, which have the advantages of high efficiency and high safety.

[0004] A low-clearance rock stratum drilling construction device comprises:

[0005] A rotary drilling machine is provided with a working platform, and the working platform is provided with a through hole for operation;

[0006] A rack is provided with a crane and a first material taking device, and the first material taking device is located in the material moving space. The crane drives the first material taking device to pass through the through hole and clamp and hoist the fractured rock core.

[0007] A full casing is driven by the rotary drilling machine, which comprises a drill rod group composed of a plurality of first drill rods connected axially, and a second drill rod connected axially with the bottom of the drill rod group. The second drill rod is provided with a splitting rod for side-topping and fracturing the rock core.

[0008] A down-the-hole hammer is axially connected to the second drill rod for annularly cutting rock strata to form a columnar rock core.

[0009] The low-clearance rock strata drilling construction device annularly cuts rock strata, breaks the rock core by side top, realizes whole core taking, and thus can realize automatic drilling operation in an environment with limited construction height, improve drilling efficiency, and reduce overall energy consumption.

[0010] Further, a plurality of top cracking oil cylinders are arranged on the working platform and distributed circumferentially outside the through hole, and the output ends of the top cracking oil cylinders are radially telescopic. The top cracking oil cylinders can clamp and break the part of the rock core with excessive height at the rock core lifting outlet, so as to ensure that the rock core can be moved transversely out.

[0011] Further, the first material taking device is annular and can be sleeved outside the rock core, the device further comprises a second material taking device coaxially arranged with the first material taking device, the second material taking device is independently lifted relative to the first material taking device, and a plurality of clamping oil cylinders are arranged on the working platform and distributed circumferentially outside the through hole. The clamping oil cylinders and the top cracking oil cylinders are arranged in a stacked manner in the height direction or are arranged in a staggered manner in the same horizontal plane. This structure can realize multiple core taking at one time, reduce the difficulty of side top, reduce the processing frequency of the inclined section, further improve the drilling efficiency, and avoid the problems of vibration caused by rock falling and subsequent processing difficulty caused by rock body breaking.

[0012] Further, the clamping oil cylinders are arranged on the sliding guide to realize radial adjustment. This structure can adjust the radial position of the clamping oil cylinders, so as to adapt to the problem of irregular shape caused by the inclined section.

[0013] Further, the first material taking device comprises a body provided with an inner cavity and a clamping arm arranged on the outer periphery of the body. The clamping arm comprises a first connecting part and a second connecting part hinged by a first hinge shaft, and a clamping part hinged with the second connecting part by a second hinge shaft. The first hinge shaft is arranged on the body by sliding in a sliding groove. The clamping part is also hinged to the body, and the clamping end penetrates into the body. The first connecting part is connected with the lifting rope. This material taking device structure can be in an everted state during the descending process, and be turned inward during the lifting process due to the pulling force. The greater the weight of the rock core, the greater the holding force, and stable clamping can be realized.

[0014] Further, the rack is a portal structure, further comprising a walking assembly and a supporting assembly, the walking assembly comprising a mounting frame, a walking wheel rotatably arranged on the mounting frame, and a walking driving cylinder for driving the walking wheel to rotate, the walking wheel driving the rack to move along a walking track, the supporting assembly being a portal structure comprising a lower supporting frame connected with the mounting frame, and an upper supporting frame detachably connected with the lower supporting frame, the crane being arranged on the upper supporting frame. The rack can move as a whole along the track, facilitating the linear excavation of multiple drilling wells and improving the construction efficiency.

[0015] The application further discloses a low-clearance rock stratum drilling construction method.

[0016] S1, assembling and positioning the rotary drilling machine, assembling the rack, the rack being provided with a first material taking device, assembling a down-the-hole hammer, the down-the-hole hammer being used for cutting a rock stratum in a ring shape to form a columnar rock core, preparing a plurality of first drill rods and a second drill rod, the second drill rod being provided with a splitting rod;

[0017] S2, moving the rack to a preset position, hoisting and lifting the down-the-hole hammer into the rotary drilling machine, clamping the down-the-hole hammer by using a clamping device of the rotary drilling machine, and exposing a connecting position of the down-the-hole hammer to the rotary drilling machine, then hoisting the second drill rod to the top end of the down-the-hole hammer and connecting the second drill rod with the down-the-hole hammer;

[0018] S3, connecting the whole machine pipeline, adjusting the drilling perpendicularity by using a leveling mechanism of the rotary drilling machine, starting the down-the-hole hammer, and driving the down-the-hole hammer to start drilling construction by using the rotary drilling machine;

[0019] S4, when the drilling reaches the connecting position of the second drill rod close to the top surface of the rotary drilling machine, stopping the drilling, removing the air pipe of the down-the-hole hammer, hoisting one of the first drill rods by using the rack and connecting the first drill rod with the second drill rod axially and end to end, then connecting the air pipe of the down-the-hole hammer, and continuing the drilling;

[0020] S5, repeating the steps of drilling and connecting the first drill rod to deepen the drilling depth;

[0021] S6, when the drilling reaches a preset depth, stopping the drilling, starting the splitting rod to side and top the rock core to break the rock core, then hoisting the broken rock core by using the first material taking device and moving the broken rock core out of the drilling area;

[0022] S7, then repeating S6 and S7 until the drilling reaches a target depth;

[0023] S8, clean the drill hole of debris, then measure the depth of the hole, and after confirming that the depth is correct, remove the air pipe of the down-the-hole hammer, then use the clamping device of the rotary drilling machine to lift the drill pipe and remove it section by section, and finally move the equipment to the next drilling area for continuous construction.

[0024] The low-clearance rock stratum drilling construction method can cut the rock stratum in a ring shape, break the rock core by side and top, realize whole core taking, and thus realize automatic drilling operation in an environment where the construction height is limited, improve drilling efficiency, and reduce overall energy consumption.

[0025] Further, the preset depth is less than the distance from the top surface of the rotary drilling machine to the rack, so that the rock core can be removed after being taken out.

[0026] Further, in step S1, a top-breaking oil cylinder is installed on the rotary drilling machine; in step S6, when the broken rock core cannot be removed due to the problem of excessive height, the first material taking device is controlled to make the lower part of the rock core exceeding the height limit below the plane where the top-breaking oil cylinder is located, the top-breaking oil cylinder is started to break the rock core along the top surface of the lower part, and then the first material taking device is controlled to lift the rock core again and remove the rock core. While ensuring the length of the single core taking, the efficiency is improved by avoiding the problem that the total length of the rock core exceeds the space limit of the operation space due to the inclination of the broken surface and cannot be lifted out.

[0027] Further, in step S1, a clamping oil cylinder and a top-breaking oil cylinder are installed on the rotary drilling machine, and a second material taking device is also installed on the rack.

[0028] In step S6, the preset depth is the height of the rock core when the maximum lifting capacity of the rack is reached or the target depth.

[0029] S6.1, when the broken rock core partially exposes the working platform of the rotary drilling machine and reaches a certain height, stop lifting, start the clamping oil cylinder to clamp the rock core, at this time the first material taking device is still in the drill pipe, then the second material taking device moves to clamp the exposed part of the rock core, and then the first material taking device moves downward to release the rock core until a certain depth, and then clamp the unexposed area;

[0030] S6.2, then start the top-breaking oil cylinder to break the broken rock core into an upper part exposed to the working platform of the rotary drilling machine and a lower part not exposed to the working platform of the rotary drilling machine, the second material taking device removes the upper part from the drilling area, at this time the clamping oil cylinder releases the rock core, and the first material taking device lifts the lower part again.

[0031] Repeat steps S6.1 and S6.2 until the core is completely removed. This method can achieve multiple coring at one side top, reduce the difficulty of side top, reduce the processing frequency of inclined section, further improve the drilling efficiency, and avoid the problems of vibration caused by rock falling and subsequent processing difficulty caused by rock body breaking.

[0032] For better understanding and implementation, the present application is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 Structure schematic diagram of the drilling construction device described in embodiment 1;

[0034] Figure 2 Structure schematic diagram of the drilling construction device described in embodiment 1 after extending the whole casing;

[0035] Figure 3 Structure schematic diagram of the splitting rod;

[0036] Figure 4 Sectional view of the first material remover;

[0037] Figure 5 Structure schematic diagram of the drilling construction device described in embodiment 2;

[0038] Figure 6 Structure schematic diagram of the drilling construction device described in embodiment 3;

[0039] Figure 7 Structure schematic diagram of the material remover, clamping oil cylinder and top cracking oil cylinder described in embodiment 3;

[0040] BRIEF DESCRIPTION OF DRAWINGS: 11, walking assembly; 111, mounting frame; 112, walking wheel; 113, walking driving cylinder; 12, supporting assembly; 121, lower supporting frame; 122, upper supporting frame; 13, electric hoist; 2, rotary drilling machine; 21, working platform; 3, whole casing; 31, first drill rod; 32, second drill rod; 321, splitting rod; 3211, first oil cylinder; 3212, second oil cylinder; 4, down-the-hole hammer; 41, hammer head; 5, first material remover; 51, body; 52, clamping arm; 521, first hinged shaft; 522, second hinged shaft; 523, first connecting part; 524, second connecting part; 525, clamping part; 6, top cracking oil cylinder; 61, first space; 62, second space; 63, third space; 64, fourth space; 7, clamping oil cylinder; 8, second material remover. DETAILED DESCRIPTION

[0041] Embodiment 1

[0042] Please refer to Figures 1-4 , Figure 1A structural schematic diagram of the drilling construction device described in embodiment 1; Figure 2 A structural schematic diagram of the drilling construction device after extending the full casing in embodiment 1; Figure 3 A structural schematic diagram of the splitting rod; Figure 4 A sectional view of the first material taking device.

[0043] The application discloses a low-clearance rock stratum drilling construction device, which is used for vertical drilling in an environment with limited construction height.

[0044] The machine frame is a portal structure, comprising a walking assembly 11, a supporting assembly 12 and an electric hoist 13. The walking assembly 11 comprises a mounting frame 111, walking wheels 112 rotatably arranged on the mounting frame 111 and walking driving cylinders 113 for driving the walking wheels 112 to rotate, and the walking wheels 112 drive the whole machine frame to move along a walking track in a transverse channel so as to drill multiple wells in the transverse channel. The supporting assembly 12 comprises a lower supporting frame 121 connected with the mounting frame 111 and an upper supporting frame 122 detachably connected with the lower supporting frame 121, so that the transportation and assembly of the machine frame are facilitated. The upper supporting frame 122 is provided with the electric hoist 13, and the electric hoist 13 is used for winding a hoisting rope.

[0045] The rotary drilling machine 2 is a mechanical device capable of driving the full casing 3 to rotate by 360 degrees, straighten, lift and press, which is a commonly used device in the industry and will not be described here. The top of the rotary drilling machine 2 is provided with a working platform 21, and a through hole for hoisting out a rock core is formed in the middle of the working platform 21. The top surface of the working platform 21 and the machine frame are left with a material moving space, and the height of the material moving space determines the height of the fractured rock core in the operation of moving out of the well area.

[0046] The full casing 3 comprises a drill pipe group composed of a plurality of first drill pipes 31 connected axially end to end, and a second drill pipe 32 connected to the bottom of the drill pipe group. The first drill pipe 31 and the second drill pipe 32 are both hollow annular. The inner wall of the second drill pipe 32 is provided with a splitting rod 321, which can preferably be only one. The splitting rod 321 is provided with a plurality of first oil cylinders 3211 and second oil cylinders 3212 on both sides, respectively. The first oil cylinders 3211 and the second oil cylinders 3212 are arranged radially, the first oil cylinders 3211 are towards the inner wall of the second drill pipe 32, and the second oil cylinders 3212 are towards the central axis of the second drill pipe 32. The inner wall of the first drill pipe 31 and the second drill pipe 32 is further provided with a guard plate for fixing and protecting the air inlet pipe and the residue discharge pipe, effectively protecting the operation reliability of the air inlet pipe and the residue discharge pipe.

[0047] The down-the-hole hammer 4 is a ring-cutting type cluster hammer connected to the second drill pipe 32 through a bolt and nut. The down-the-hole hammer 4 is driven by wind energy, and the rock stratum is broken by the rolling and impact breaking function of the multiple hammer heads 41 arranged in a ring, so as to cut the rock stratum in a ring and form a columnar rock core in the inner cavity of the down-the-hole hammer 4, thereby realizing drilling. The down-the-hole hammer 4 performs residue discharge operation through a reverse circulation residue collection and discharge mode, and discharges through a residue discharge system.

[0048] The device is further provided with a first material taking device 5, which is hung on the upper support frame 122 through a lifting rope. The electric hoist 13 rotates to wind and release the lifting rope, thereby adjusting the height and state of the first material taking device 5. In this embodiment, the first material taking device 5 comprises a body 51 provided with an inner cavity and a clamping arm 52 arranged on the outer periphery of the body 51. The clamping arm 52 comprises a first connecting part 523 and a second connecting part 524 hinged through a first hinge shaft 521, and a clamping part 525 hinged to the second connecting part 524 through a second hinge shaft 522. The first hinge shaft 521 is slidingly arranged on the body 51 along a sliding groove. The clamping part 525 is also hinged to the body 51, with its clamping end penetrating into the body 51. The first connecting part 523 is connected with the lifting rope.

[0049] When the lifting rope is in a relaxed state, the first hinge shaft 521 slides downward to drive the second connecting part 524 to move downward, so that the clamping part 525 turns outward, and its clamping end moves away from the inner cavity. When the electric hoist 13 is started to make the lifting rope in a tensioned state, the first hinge shaft 521 slides upward to drive the second connecting part 524 to move upward, so that the clamping part 525 turns inward, and its clamping end moves to the inner cavity and abuts against the rock core sleeved in the inner cavity, thereby clamping the rock core. The broken rock core is taken out of the well.

[0050] Preferably, the top of the body 51 can be a closed or open structure.

[0051] If the structure is closed, the distance between the top of the body 51 and the first top oil cylinder 6 in the inner cavity determines the length of the broken core each time the core is taken.

[0052] If the structure is open, the first material extractor 5 can be sleeved outside the core and freely moved in the depth direction, and the length of the broken core each time the core is taken is determined by the position of the first material extractor 5 relative to the core, so a sensor can be added in the first material extractor 5 to detect the moving depth of the first material extractor 5.

[0053] The device also includes a control system for controlling the operation of each part, an air compression system for providing air pressure, and a power distribution system for providing electrical energy.

[0054] This embodiment is described by taking the working condition of a construction space below 4m and a middle pile diameter of 1.7m as an example, and the construction method is as follows:

[0055] S1, assemble and debug the device. During assembly, first assemble the rotary drill and the rack respectively, then make the rack travel to the area where the rotary drill is located, and check whether interference occurs. Then install and position the air compressor (4 with 1 spare), oil atomizer, slag collector and dust remover in the cross channel, and connect the pipelines, and test the air compressor under no load. Complete the assembly of the down-the-hole hammer, connect the air pipe, then test whether the air passage is smooth, after the test is completed, remove the pipeline, and keep the hammer body in a state of waiting for assembly.

[0056] S2, install the second drill rod and the down-the-hole hammer. Center the device center with the drilling center, ensure the accuracy within 20mm, then use the rack to hoist the down-the-hole hammer to the center position of the rotary drill, make the down-the-hole hammer pass through the through hole into the rotary drill, while ensuring that the bolt hole is exposed to the working platform, use the main clamping device of the rotary drill to clamp the down-the-hole hammer. Then hoist the second drill rod to the top end of the down-the-hole hammer, complete the butt joint with the down-the-hole hammer, and tighten the bolt to complete the assembly. In this embodiment, the down-the-hole hammer has a diameter of 1.7m, which can meet the one-time operation depth of 20m, the single-piece height of the drill rod is 1.6m, and the effective length is 1.37m.

[0057] S3, start drilling. Connect the whole machine pipeline, test all functions, then adjust the drilling perpendicularity by using the leveling mechanism of the rotary drill, retest the perpendicularity of the whole casing by using the plumb bob, confirm that there is no error, then start the down-the-hole hammer, and use the rotary drill to drive the down-the-hole hammer to start drilling construction.

[0058] S4, extend the whole casing. When drilling to the connection bolt hole position of the second drill rod approaches the top surface of the working platform of the rotary drill, stop drilling, remove the down-the-hole hammer air pipe, use the rack to hoist a first drill rod to the working surface, complete the butt joint of the first drill rod and the second drill rod, then connect the down-the-hole hammer air pipe, start the air compressor, and continue drilling.

[0059] S5, repeat the step, splice the extended drill pipe set, so that the drilling depth is deepened.

[0060] S6, take the core. Stop drilling when drilling to a preset depth, which is determined by the height of the material transfer space, so that the broken core can be lifted to cross the material transfer space to achieve the removal of the drilling area. Therefore, the preset depth is less than the distance between the top surface of the rotary drilling machine and the rack. In this embodiment, the preset height is about 2.4m (i.e. the height of the broken core is about 2.4m). At this time, the splitting rod is started to side and top the core, so that the core is broken at a position located at the top of the down-the-hole hammer. The side and top is specifically that the first oil cylinder is extended to contact the inner side wall of the second drill pipe to position the splitting rod, and the second oil cylinder is extended and pressed to the core to break it.

[0061] As preferred, during the side and top process, the rotary drilling machine can be started to make the splitting rod side and top the core at multiple angles in the circumferential direction, so as to improve the success rate of side and top and the flatness of the section.

[0062] Then the electric hoist is started to release the lifting rope, so that the first material extractor is lowered to a certain depth and is sleeved between the core and the full casing, and then the electric hoist is started to tighten the lifting rope to lift the first material extractor. During the lifting process, the first material extractor clamps the broken core and removes it from the drilling, and translates the core away from the drilling area.

[0063] S7, then repeat S5 and S6 until the drilling reaches the target depth.

[0064] S8, clean the drilling debris, then measure the well depth, confirm that there is no error, then remove the down-the-hole hammer air pipe, then use the main and auxiliary clamping devices of the rotary drilling machine to lift the full casing and remove it in sections. Continue to drive the equipment to the next drilling area for construction.

[0065] Embodiment 2

[0066] Please refer to Figure 5 , Figure 5 The structure diagram of the drilling construction device described in embodiment 2. This embodiment is basically the same as embodiment 1, and the difference is that a plurality of top breaking oil cylinders 6 are arranged on the working platform 21, and the top breaking oil cylinders 6 are distributed in the circumferential direction outside the through hole.

[0067] The difference between the construction method and embodiment 1 is that in step S6, when the broken core has an overheight problem, the first material extractor is controlled to move to the through hole, so that the lower part of the core exceeding the height limit is located below the plane where the top breaking oil cylinder is located. At this time, the top breaking oil cylinder is started to break the lower half of the core that exceeds the length, and then the core is lifted to a certain height, so that the core can be smoothly translated and removed.

[0068] Embodiment 3

[0069] Please refer to Figures 6-7 , Figure 6 for the structural schematic diagram of the drilling operation device described in Example 3; Figure 7 for the staggered layout schematic diagram of the material extractor, clamping oil cylinder and top cracking oil cylinder described in Example 3.

[0070] This example is basically the same as Example 2, and the only difference is that a plurality of clamping oil cylinders 7 are further arranged on the working platform 21 and distributed circumferentially outside the through holes. The clamping oil cylinders 7 and the top cracking oil cylinder 6 can be arranged in a superimposed manner in the height direction or staggered in the same horizontal plane.

[0071] The first material extractor 5 needs to be an open structure. The device further comprises a second material extractor 8 coaxially arranged with the first material extractor 5 and independently lifted by a hoisting rope drive. The second material extractor 8 needs to be arranged at a position higher than the first material extractor 5, and its structure can be the same as that of the first material extractor 5 or other hoisting structures, such as being capable of being fixed to the core by drilling into the core to realize hoisting.

[0072] When the second material extractor 8 has the same structure as the first material extractor 5 (i.e., both are annular), as a preferred arrangement, the top cracking oil cylinder 6 has four and is uniformly distributed circumferentially, and the top cracking oil cylinder 6 forms a first space 61 and a third space 63 perpendicular and opposite to the core lateral moving-out direction (such as the direction of the arrow), and a second space 62 and a fourth space 64 arranged along the core lateral moving-out direction and opposite to each other. The hoisting rope of the first material extractor 5 is located in the first space 61 and the third space 63 (such as the solid line intersection position), and the hoisting rope of the second material extractor 8 is located in the second space 62 and the fourth space 64 (such as the dashed line intersection position), preventing mutual interference. The clamping oil cylinder 7 is arranged in the first space 61 and the third space 63 to avoid collision with the clamping oil cylinder 7 when the core moves out. Figure 7 Figure 7 Figure 7 As a preferred arrangement, the clamping oil cylinder 7 can be arranged on a sliding guide rail to realize radial adjustment, thereby adapting to the problem of irregular shape caused by the inclination of the cross section.

[0073] This example does not need to consider the height of the core when splitting, and the difference between its construction method and that of Example 3 is that:

[0074] This example does not need to consider the height of the core when splitting, and the difference between its construction method and that of Example 3 is that:

[0075] ​​S6, coring. When drilling to the hoisting limit or target depth, stop drilling, at this time, start the wedge to break the core, and the core is broken along the position at the top of the down-the-hole hammer. Then start the electric hoist to release the hoisting rope, and the first coring device is sleeved between the core and the entire casing and is lowered to a certain depth, and then the electric hoist pulls the hoisting rope to hoist the first coring device, and the first coring device clamps the broken core and moves it to the drilling wellhead during hoisting.

[0076] S6.1, when the broken core partially exposes the rotary drilling platform and reaches the limit height of the material moving space, stop hoisting, start the clamping oil cylinder to clamp the core, at this time the first coring device is still below the working platform. Then the second coring device moves to clamp the exposed part of the core, and then the first coring device moves downward to release the core until a certain depth, and then the hoisting rope is lifted to clamp the unexposed core. The certain depth needs to ensure that the height of the broken core exposed during subsequent hoisting reaches the limit height, and the first coring device still remains in the first drill rod or the second drill rod.

[0077] S6.2, at this time, start the second top cracking oil cylinder to break the broken core into the upper part exposed to the rotary drilling platform and the lower part exposed to the rotary drilling platform. The second coring device moves the upper part of the core out of the drilling area, the clamping oil cylinder is released, and the first coring device hoists the remaining part of the core again.

[0078] Repeat steps S6.1 and S6.2 until the core is completely removed.

[0079] Since the height of the broken core at the hoisting limit is usually much greater than the distance between the working platform and the top surface of the transverse channel, the structure and method do not need to control the height of the broken core, reduce the difficulty of side top, reduce the frequency of processing inclined sections, further improve the drilling efficiency, and avoid the problems of vibration caused by rock falling and subsequent processing difficulties caused by rock breaking in embodiment 3.

[0080] The low-clearance rock stratum drilling construction device and method can cut the rock stratum in a ring, break the core by side top, and realize whole coring, so as to realize automatic drilling operation in an environment with limited construction height, improve drilling efficiency, and reduce overall energy consumption.

[0081] It should be understood that, in the description of the present application, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated, that is, the features with "first", "second" can explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0082] It should be noted that, in the description of the present application, unless otherwise specified and limited, the terms "set", "connected", "connected", "hollow" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0083] The above-described embodiments only express several embodiments of the present application, which are described in detail and in detail, but cannot be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, and the present application also intends to include these modifications and improvements.

Claims

1. A low-clearance drilling construction device, characterized by, The utility model relates to a low-clearance rock stratum drilling construction device, which comprises the following components: a rotary drilling machine, which is provided with a working platform having a through hole for operation, a plurality of top-cracking oil cylinders distributed in the circumferential direction outside the through hole, the output ends of the top-cracking oil cylinders being radially retractable, and a plurality of clamping oil cylinders distributed in the circumferential direction outside the through hole, the clamping oil cylinders and the top-cracking oil cylinders being arranged in the height direction or being staggered in the same horizontal plane; a rack, in which the rotary drilling machine is arranged, a space being left between the top surface of the rotary drilling machine and the rack for material movement, a crane and a first material taking device being arranged on the rack, the first material taking device being located in the space for material movement, the crane driving the first material taking device to pass through the through hole and clamp and hoist the fractured core, the first material taking device being annular and capable of being sleeved outside the core, a second material taking device being coaxially arranged with the first material taking device and being independently lifted relative to the first material taking device; a full casing, which is driven by the rotary drilling machine and comprises a drill rod group composed of a plurality of first drill rods and a second drill rod axially connected to the bottom of the drill rod group, the second drill rod being provided with a splitting rod for side-topping and cracking the core; a down-the-hole hammer, which is axially connected to the second drill rod and used for annularly cutting the rock stratum to form a columnar core.

2. The low-clearance drilling construction device according to claim 1, characterized in that: The clamping oil cylinders are arranged on sliding guides to realize radial adjustment.

3. The low-clearance drilling construction device of claim 1, wherein: The first material taking device comprises a body provided with an inner cavity and a clamping arm arranged on the outer periphery of the body, the clamping arm comprising a first connecting part and a second connecting part hinged by a first hinge shaft, and a clamping part hinged to the second connecting part by a second hinge shaft, the first hinge shaft being slidably arranged on the body along a sliding groove, the clamping part being further hinged to the body with the clamping end penetrating into the body, and the first connecting part being connected with a lifting rope.

4. The low-clearance drilling construction device of claim 1, wherein: The rack is of a portal structure and further comprises a walking assembly and a supporting assembly, the walking assembly comprising a mounting frame, a walking wheel rotatably arranged on the mounting frame, and a walking driving cylinder for driving the walking wheel to rotate, the walking wheel driving the rack to move along a walking track, the supporting assembly being of a portal structure and comprising a lower supporting frame connected to the mounting frame, and an upper supporting frame detachably connected to the lower supporting frame, the crane being arranged on the upper supporting frame.

5. A method of drilling a well in low-clearance formations, characterized in that, The low-clearance rock stratum drilling construction device comprises the following steps: S1, assembling and positioning the rotary drilling machine, assembling the rack, arranging the first material taking device on the rack, assembling the down-the-hole hammer, preparing a plurality of first drill rods and a second drill rod provided with a splitting rod, and assembling the full casing. S2, move the rack to a preset position, hoist the hammer and put it into the rotary drilling machine, clamp the hammer by the clamping device of the rotary drilling machine, expose the connecting position of the hammer, then hoist the second drill rod to the top of the hammer and complete the connection; S3, connect the pipeline of the whole machine, adjust the drilling verticality by the leveling mechanism of the rotary drilling machine, start the hammer, and drive the hammer to start drilling by the rotary drilling machine; S4, when drilling to the connecting position of the second drill rod close to the top surface of the rotary drilling machine, stop drilling, remove the air pipe of the hammer, hoist a first drill rod by the rack and connect it with the second drill rod axially, then connect the air pipe of the hammer and continue drilling; S5, repeat the steps of drilling and connecting the first drill rod to deepen the drilling depth; S6, stop drilling when drilling to a preset depth, start the splitting rod to side and top the rock core, break the rock core, then hoist the broken rock core by the first material handler and move it out of the drilling area; S7, then repeat S5 and S6 until the drilling reaches the target depth; S8, clean the drilling debris, then measure the well depth, confirm the accuracy, remove the air pipe of the hammer, then lift the drill rod by the clamping device of the rotary drilling machine and remove it section by section, finally drive the equipment to the next drilling area for construction.

6. The low-clearance formation drilling method of claim 5, wherein: The preset depth is less than the distance between the top surface of the rotary drilling machine and the rack.

7. The low-clearance rock stratum drilling construction method according to claim 6, characterized in that: In step S1, a top cracking oil cylinder is installed on the rotary drilling machine; In step S6, when the broken rock core cannot be moved out due to the problem of excessive height, the first material handler is controlled to make the lower part of the rock core exceeding the height limit below the plane where the top cracking oil cylinder is located, the top cracking oil cylinder is started to break the rock core along the top surface of the lower part, then the first material handler is controlled to lift the rock core again and move it out.

8. The low-clearance rock stratum drilling construction method according to claim 5, characterized in that: In step S1, a clamping oil cylinder and a top cracking oil cylinder are installed on the rotary drilling machine, and a second material handler is also installed on the rack; In step S6, the preset depth is the height of the rock core when the rack has the maximum lifting capacity or the target depth; The step S6 further comprises: S6.1, when the exposed part of the broken rock core reaches the limit height on the working platform of the rotary drilling machine, stop lifting, start the clamping oil cylinder to clamp the rock core, at this time the first material handler is still in the first drill rod, then the second material handler moves to clamp the exposed part of the rock core, and then the first material handler moves downward to release the rock core until a certain depth, and then clamp the unexposed part of the rock core. S6.2, then the top cracking cylinder is started to break the fractured core into an upper part which exposes the working platform of the rotary drilling machine and a lower part which does not expose the working platform of the rotary drilling machine, the second material handler moves the upper part out of the drilling area, at this time the clamping cylinder releases the core, and the first material handler hoists the lower part again; Steps S6.1 and S6.2 are repeated until the core is completely removed.

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