Drilling follow-up casing device

Abstract

The invention relates to the technical field of drilling, in particular to a drilling follow-up casing device which comprises a drill rod and a drill bit installed at the lower end of the drill rod, a bottom pipe is arranged at the upper end of the drill bit, a connecting assembly is installed on the inner wall of the bottom pipe, and the inner wall of the connecting assembly is connected with the outer end of the drill bit. A plurality of connecting support arms are movably arranged at the left end and the right end of the drill rod at equal intervals, arc-shaped pressing plates are installed at the other ends of the connecting support arms, second arc-shaped racks are installed at the lower ends of the arc-shaped pressing plates, a plurality of auxiliary assemblies are arranged on the inner walls of the sleeve assemblies at equal intervals, and the upper ends of the auxiliary assemblies are meshed with the second arc-shaped racks. According to the design, timely casing follow-up is carried out in the drilling process, casing follow-up operation is assisted, the probabilities of falling, collapse and the like of the hole wall of a detection hole in the drilling work are effectively reduced, the probabilities of material blocking and the like in the casing follow-up process are effectively reduced, and the drilling effect is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to a drilling follow-up casing device, belonging to the technical field of drilling. Background Art

[0002] Drilling is the use of mechanical technology to conduct exploration operations, providing relevant data for subsequent operations such as mining underground or seabed natural resources. Generally, a drilling mechanism consisting of a drill bit and a drill rod of a certain length installed on the drill bit is used to drill holes for drilling operations. At present, during the drilling process, it is easy to encounter weak formations or formations with serious circulating fluid leakage and easy hole collapse. Generally, casing is driven into the drilled exploration hole, so as to support the hole wall with casing to ensure the smooth completion of subsequent exploration work;

[0003] At present, casing is generally composed of multiple pipes, and two adjacent pipes are threadedly connected. When in use, a drilling mechanism is first used to drill the ground to be drilled. After drilling to a certain depth, the drilling mechanism is taken out, and then a section of pipe is driven into the drilled exploration hole by a pile driver and other equipment, and then the drilling operation is carried out. However, in such casing follow-up operations, the wall of the exploration hole is exposed for a period of time, resulting in a high probability of the wall of the exploration hole falling off and collapsing during the drilling work, which will affect the drilling effect. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a drilling follow-up casing device.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a drilling follow-up casing device, including a drill rod and a drill bit installed at the lower end of the drill rod, a bottom pipe is arranged at the upper end of the drill bit, and the drill bit extends into the bottom pipe, a connecting component is installed on the inner wall of the bottom pipe, and the bottom pipe is located on the outside of the drill rod, the inner wall of the connecting component is connected to the outer end of the drill bit, a plurality of casing components are equidistantly arranged on the outside of the drill rod, and two adjacent casing components are fitted to each other, the casing component located at the lowest side is fitted to the upper end of the bottom pipe, and the left side of the drill rod is provided with a plurality of casing components, and the casing components are provided at the lowest side, and the left side of the drill rod is provided with a plurality of casing components, and the right side of the casing components are ... A plurality of connecting arms are movably arranged at equidistant intervals at both ends of the right side, and the connecting arms are arranged in an inclined manner with the outer side lower and the inner side higher. An arc pressure plate is installed at the other ends of the plurality of connecting arms, and the arc pressure plate is located on the outer side of the drill pipe. The arc pressure plate is on the inner side of the casing assembly. The connecting arm is movably connected to the return assembly toward the inner end, and the other end of the return assembly is connected to the outer end of the drill pipe. A second arc rack is installed at the lower end of the arc pressure plate, and a plurality of auxiliary components are equidistantly arranged on the inner wall of the casing assembly, and a second arc rack is meshed at the upper end of the auxiliary component.

[0006] Furthermore, the return assembly includes an auxiliary support arm, which is movably arranged on the inner end of the connecting arm, and the auxiliary support arm is inclined with the outer side lower and the inner side higher. A slider is movably installed on the other end of the auxiliary support arm, and the slider is slidably connected to the mounting groove. The mounting groove is opened on the outer end of the drill pipe, and two round rods are symmetrically installed inside the mounting groove. The two round rods both pass through the slider, and the slider is slidably connected to the round rods. Two elastic parts are symmetrically installed between the upper end of the slider and the top end of the mounting groove, and the two elastic parts are respectively located on the outside of the two round rods.

[0007] Furthermore, the casing assembly includes two semicircular sleeves, which are fitted with each other and arranged relatively to each other. The semicircular sleeves are located on the outside of the arc-shaped pressure plate, and the inner end of the semicircular sleeve is recessed outward to form a slot, and the slot extends to the upper and lower ends of the semicircular sleeve respectively. The slot is located on the outside of the drill pipe, and a clamping strip is installed on the inner end of the semicircular sleeve, and the clamping strip is located in the slot on the other semicircular sleeve.

[0008] Furthermore, the inner wall of the card slot is recessed outward to form a plurality of positioning holes, and a plurality of positioning columns are equidistantly installed at the outer end of the card strip, and the plurality of positioning columns are respectively located in the plurality of positioning holes.

[0009] Furthermore, the auxiliary component includes two arc-shaped fixing plates, which are respectively arranged on the inner walls of two semicircular sleeve plates, and are arranged relative to each other. The two arc-shaped fixing plates are in contact with each other, and the arc-shaped fixing plates are located on the outside of the drill rod. The upper ends of the two arc-shaped fixing plates are both equipped with a first arc-shaped rack, and the upper end of the first arc-shaped rack is meshed with a second arc-shaped rack.

[0010] Furthermore, the connecting assembly includes a first bevel gear, which is installed on the inner wall of the bottom tube and is arranged to be narrow at the top and wide at the bottom. The lower end surface of the bottom tube coincides with the lower end surface of the first bevel gear. A second bevel gear is arranged at the upper outer end of the drill bit, and the second bevel gear is located in the bottom tube. The outer end of the second bevel gear is meshed with the inner wall of the first bevel gear, and the second bevel gear is located on the inner side of the arc-shaped fixing plate, and the second bevel gear is arranged to be narrow at the bottom and wide at the top.

[0011] Furthermore, a plurality of second U-shaped frames are equidistantly installed at the upper end of the bottom tube, the lower end surface of the semicircular sleeve is recessed upward to form a plurality of grooves, and a second U-shaped frame is placed in the groove at the lowermost side, and a plurality of first U-shaped frames are equidistantly arranged at the upper end of the semicircular sleeve.

[0012] Beneficial effects of the present invention:

[0013] 1. The first bevel gear and the second bevel gear are used to restrict the installation between the drill bit and the bottom pipe. The second arc-shaped rack, the first arc-shaped rack, the arc-shaped pressure plate, the arc-shaped fixing plate and the connecting arm are used to restrict the installation between the semicircular sleeve and the drill pipe. During the drilling movement, the bottom pipe and the casing assembly composed of two semicircular sleeves are rotated and moved downward, so that timely casing follow-up is achieved during the drilling process, and the casing follow-up operation is assisted, which effectively reduces the probability of the borehole wall falling off and collapsing during the drilling work, effectively reduces the probability of material jamming during the casing follow-up process, and effectively ensures the drilling effect.

[0014] 2. By using multiple positioning columns, multiple positioning holes, clamping strips and clamping grooves, the two semicircular sleeves are positioned and sealed to form a casing assembly, which effectively reduces the leakage of mud and other substances on the borehole wall into the casing assembly, and effectively ensures the protection effect of the borehole wall and the drilling effect.

[0015] 3. By using the auxiliary support arm, the slider and the two round rods, the arc-shaped pressure plate and the second arc-shaped rack are swung inward and moved to the inside of the arc-shaped fixed plate, so that the drill rod, the drill bit, the second arc-shaped rack and other components can be normally taken out from the casing mechanism formed by the bottom pipe and multiple casing assemblies, effectively avoiding the phenomenon of hard collision of the second arc-shaped rack and other components when being taken out, effectively reducing the probability of damage to the second arc-shaped rack and other components, effectively ensuring the drilling effect and service life, and through the elastic part, the connecting support arm, the arc-shaped pressure plate, the second arc-shaped rack, the auxiliary support arm and the slider are returned to their original positions, so that the second arc-shaped rack and the first arc-shaped rack can be assembled conveniently during subsequent drilling, and the time and labor intensity of drilling operations can be effectively reduced, effectively ensuring the drilling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0017] Figure 1 It is a structural schematic diagram of a drilling follow-up casing device of the present invention;

[0018] Figure 2 A cross-sectional view of a drilling follow-up casing device according to the present invention;

[0019] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0020] Figure 4 for Figure 2 Enlarged view of middle part B;

[0021] Figure 5 A three-dimensional diagram of a drill bit in a drilling follow-up casing device of the present invention;

[0022] Figure 6 A three-dimensional diagram of a bottom pipe in a drilling follow-up casing device of the present invention;

[0023] Figure 7 It is a cross-sectional view of a bottom pipe in a drilling follow-up casing device of the present invention;

[0024] Figure 8 It is an assembly diagram of a semicircular sleeve plate, an arc-shaped fixing plate and a first arc-shaped rack in a drilling follow-up casing device of the present invention;

[0025] Fig. 9 A three-dimensional diagram of a semicircular sleeve plate in a drilling follow-up sleeve device of the present invention;

[0026] Fig.10 It is an assembly diagram of an arc-shaped pressing plate, an auxiliary support arm and a connecting support arm in a drilling follow-up casing device of the present invention;

[0027] Fig.11 The present invention is a stereoscopic diagram of a drill rod in a drilling follow-up casing device.

[0028] In the figure: 1, drill rod, 2, semicircular sleeve, 3, bottom pipe, 4, drill bit, 5, arc pressure plate, 6, auxiliary support arm, 7, connecting support arm, 11, elastic member, 12, mounting groove, 13, slider, 14, round rod, 21, first U-shaped frame, 22, arc fixing plate, 23, first arc rack, 24, clamping strip, 25, positioning column, 26, clamping groove, 27, positioning hole, 28, groove, 31, first bevel gear, 32, second U-shaped frame, 41, second bevel gear, 51, second arc rack. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] Embodiment 1: Figure 1-Figure 11 As shown, a drilling follow-up casing device is provided, comprising a drill rod 1 and a drill bit 4 installed at the lower end of the drill rod 1, a bottom pipe 3 is arranged at the upper end of the drill bit 4 extending into the bottom pipe 3, and the bottom pipe 3 is located outside the drill rod 1, through the drill bit 4, for drilling operations, a plurality of casing assemblies consisting of two semicircular sleeve plates 2 that are fitted and arranged oppositely and are located outside an arc-shaped pressing plate 5 are equidistantly arranged outside the drill rod 1, and two adjacent casing assemblies are fitted to each other, and the casing assembly located at the lowest side is fitted to the upper end of the bottom pipe 3, and the bottom pipe 3 is used in conjunction with a plurality of casing assemblies to support the hole wall produced by drilling;

[0031] The inner end surface of the semicircular sleeve 2 is recessed outward to form a card slot 26 that extends to the upper and lower ends of the semicircular sleeve 2 and is located on the outside of the drill pipe 1. The card slot 26 provides an installation space for the card strip 24, and the card strip 24 in the card slot 26 on the other semicircular sleeve 2 is installed on the inner end of the semicircular sleeve 2. The card slot 26 and the card strip 24 are used in conjunction with each other to achieve a sealed connection between the two semicircular sleeves 2 that fit each other. A plurality of positioning holes 27 are recessed outward on the outer inner wall surface of the card slot 26, and a plurality of positioning posts 25 that are respectively located in the plurality of positioning holes 27 are equidistantly installed on the outer end of the card strip 24. The plurality of positioning holes 27 and the plurality of positioning posts 25 are used in conjunction with each other to achieve a positioning installation between the two semicircular sleeves 2 that fit each other.

[0032] A plurality of connecting arms 7 are equidistantly arranged at both ends of the drill pipe 1, and are arranged obliquely with the outer side lower and the inner side higher. The arc-shaped pressure plate 5 is connected to the drill pipe 1 through the connecting arms 7. The arc-shaped pressure plates 5 located on the outer side of the drill pipe 1 and on the inner side of the semicircular sleeve plate 2 are respectively installed on the other ends of the plurality of connecting arms 7. The arc-shaped pressure plates 5 are used to provide a mounting carrier for the second arc-shaped rack 51, and a plurality of auxiliary components are equidistantly arranged on the inner wall of the casing component. The auxiliary components are composed of two arc-shaped fixing plates 22 located on the outer side of the drill pipe 1, which are arranged oppositely and fit each other, and the two arc-shaped fixing plates 22 are respectively arranged on the inner walls of the two semicircular sleeve plates 2. The arc-shaped fixing plates 22 are used to increase the strength of the semicircular sleeve plate 2 on the one hand, and provide a mounting carrier for the first arc-shaped rack 23 on the other hand.

[0033] The second arc rack 51 is installed on the lower end of the arc pressure plate 5, and the first arc rack 23 with the second arc rack 51 meshed on the upper end is installed on the upper end of the arc fixing plate 22. The first arc rack 23 and the second arc rack 51 are used in conjunction with each other to restrict the installation between the arc pressure plate 5 and the arc fixing plate 22. Then, a plurality of second U-shaped frames 32 located at the grooves 28 on the lower side are equidistantly installed on the upper end of the bottom tube 3. The plurality of second U-shaped frames 32 are used in conjunction with each other to facilitate carrying the bottom tube 3. A plurality of grooves 28 are formed on the lower end surface of the semicircular sleeve plate 2. The grooves 28 and the second U-shaped frames 32 are used in conjunction with each other to facilitate clamping between the bottom tube 3 and the lowermost sleeve assembly. The plurality of first U-shaped frames 21 are equidistantly arranged on the upper end of the semicircular sleeve plate 2. The plurality of first U-shaped frames 21 are used in conjunction with each other to facilitate carrying the semicircular sleeve plate 2.

[0034] The first bevel gear 31 which is narrow at the top and wide at the bottom and whose lower end surface coincides with the lower end surface of the bottom tube 3 is installed on the inner wall of the bottom tube 3, and the second bevel gear 41 which is located in the bottom tube 3 and whose outer end is meshed with the inner wall of the first bevel gear 31 and is located on the inner side of the arc-shaped fixing plate 22 and is narrow at the bottom and wide at the top is set on the upper outer end of the drill bit 4. The first bevel gear 31 and the second bevel gear 41 are used in conjunction with each other to limit the installation between the bottom tube 3 and the drill bit 4.

[0035] Before use, the bottom pipe 3 is first carried to the position to be drilled by using a plurality of second U-shaped frames 32, and then the structure composed of the drill bit 4 and the drill rod 1 is passed through the bottom pipe 3 and contacts the ground, and the first bevel gear 31 and the second bevel gear 41 are meshed with each other, and then the driving structure is rotated and moved downward, so as to perform the drilling operation, and during the drilling process, the second bevel gear 41 is moved downward. Since the first bevel gear 31 and the second bevel gear 41 are meshed with each other, the downward movement of the second bevel gear 41 will cause the first bevel gear 31 to move downward, and then the bottom pipe 3 is moved downward, so that the bottom pipe 3 enters the exploration hole produced by drilling;

[0036] When the bottom pipe 3 moves down to a suitable position, a plurality of first U-shaped frames 21 are used to carry a semicircular sleeve plate 2 to one side of the drill pipe 1, and a plurality of second arc-shaped racks 51 on one side are respectively engaged with the upper ends of a plurality of corresponding first arc-shaped racks 23, so that a plurality of arc-shaped pressing plates 5 are respectively restricted and installed between a plurality of arc-shaped fixing plates 22, and then another semicircular sleeve plate 2 is carried to the other side of the drill pipe 1, and a plurality of second arc-shaped racks 51 on the other side are respectively engaged with the upper ends of a plurality of corresponding first arc-shaped racks 23, so that a plurality of arc-shaped pressing plates 5 are respectively restricted and installed between a plurality of arc-shaped fixing plates 22;

[0037] Then, multiple positioning columns 25 are respectively inserted into multiple positioning holes 27, and then the clamping strip 24 is clamped into the corresponding clamping groove 26, so that the two semicircular sleeve plates 2 are mutually positioned and sealed to form a casing assembly, effectively reducing the leakage of mud and other substances on the borehole wall into the casing assembly, effectively ensuring the protection effect of the borehole wall and the drilling effect, and then the casing assembly is placed on the upper end of the bottom pipe 3, and the multiple second U-shaped frames 32 on the bottom pipe 3 are respectively inserted into the multiple corresponding grooves 28, so that the casing assembly and the bottom pipe 3 are restricted and installed, and then the drilling operation is continued, so as to realize the convenient assembly of the casing assembly, thereby assisting the casing follow-up operation;

[0038] Then the bottom pipe 3 continues to move into the exploration hole, and the drill pipe 1 also moves downward, so that the multiple arc-shaped pressure plates 5, the multiple connecting arms 7 and the multiple second arc-shaped racks 51 move downward, and then exert downward movement on the corresponding first arc-shaped racks 23 and the arc-shaped fixing plate 22, so that the casing assembly moves downward and enters the exploration hole;

[0039] The above steps are repeated, and the first U-shaped frame 21 is inserted into the corresponding groove 28 at the lower end of the corresponding upper semicircular sleeve plate 2, so that the installation between two adjacent casing assemblies is restricted, and the drilling operation is continued, so as to drill a manhole of designed depth, and the casing mechanism formed by the bottom pipe 3 and multiple casing assemblies enters the manhole, so as to realize timely casing follow-up during the drilling process, effectively reduce the probability of the manhole wall falling off and collapsing during the drilling work, and effectively ensure the drilling effect;

[0040] At the same time, during the rotary drilling process of the drill bit 4, the second bevel gear 41 will rotate. Since the second bevel gear 41 is meshed with the first bevel gear 31, the rotation of the second bevel gear 41 will rotate the first bevel gear 31, and then the bottom pipe 3 will rotate, thereby assisting the bottom pipe 3 to enter the exploration hole. At the same time, the rotation of the bottom pipe 3 will rotate the plurality of second U-shaped frames 32, and with the assistance of the grooves 28, the lowermost casing assembly will rotate, and the plurality of first U-shaped frames 21 and the corresponding grooves 28 will be used to rotate other casing assemblies;

[0041] At this time, the drill rod 1 and the drill bit 4 rotate simultaneously, thereby causing the multiple arc-shaped pressure plates 5, the multiple connecting arms 7 and the multiple second arc-shaped racks 51 to rotate. Since the second arc-shaped teeth are meshed with the corresponding first arc-shaped racks 23, the rotation of the second arc-shaped racks 51 will cause the first arc-shaped racks 23 to rotate, thereby assisting the rotation of the casing assembly. The rotating casing assembly can assist the casing assembly to enter the exploration hole, assist the follow-up operation of the casing, effectively reduce the probability of material jamming during the casing follow-up process, effectively reduce the probability of the exploration hole wall falling off, collapse, etc. during the drilling work, and effectively ensure the drilling effect.

[0042] Embodiment 2: Figure 1 , Figure 2 , Figure 3 , Fig.10 and Fig.11 As shown, the auxiliary support arm 6 with an outer lower and inner higher inclined arrangement is movably arranged on the inner end of the connecting support arm 7, the connecting support arm 7 is lifted by the auxiliary support arm 6, and the slider 13 slidably connected to the mounting groove 12 is movably installed on the other end of the auxiliary support arm 6, and the slider 13 is used to provide a mounting carrier for the auxiliary support arm 6 and other components;

[0043] The mounting groove 12 is opened on the outer end of the drill pipe 1, and two round rods 14 that penetrate the slider 13 and are slidably connected to the slider 13 are symmetrically installed inside the mounting groove 12. The two round rods 14 are used together to guide the movement of the slider 13, and two elastic members 11 located on the outer sides of the two round rods 14 are symmetrically installed between the upper end of the slider 13 and the top of the inner side of the mounting groove 12. The two elastic members 11 are used together to return the slider 13 to its original position. The elastic member 11 can be a spring.

[0044] When drilling is completed, the structure composed of the drill bit 4 and the drill rod 1 moves upward, thereby causing the second bevel gear 41 to move upward directly and separate from the first bevel gear 31, and at the same time, multiple arc-shaped pressure plates 5, multiple connecting arms 7 and multiple second arc-shaped racks 51 also move upward, thereby separating the second arc-shaped racks 51 from the corresponding first arc-shaped racks 23. When the upward-moving connecting arms 7 contact the lower ends of the corresponding arc-shaped fixing plates 22, the connecting arms 7 will swing inwards under the obstruction of the corresponding arc-shaped fixing plates 22, thereby causing the arc-shaped pressure plates 5 and the second arc-shaped racks 51 to swing inwards and move to the inner side of the arc-shaped fixing plates 22, so that the drill rod 1, the drill bit 4, the second arc-shaped racks 51 and other components can be normally removed from the casing mechanism formed by the bottom pipe 3 and multiple casing assemblies, effectively avoiding the phenomenon of hard collision of the second arc-shaped racks 51 and other components when being removed, effectively reducing the probability of damage to the second arc-shaped racks 51 and other components, and effectively ensuring the drilling effect and service life;

[0045] The inward swinging of the connecting arm 7 will cause the corresponding auxiliary arm 6 to swing inward toward the outside, thereby causing the auxiliary arm 6 to move upward inward, so that the slider 13 moves upward along the mounting groove 12 and the two round rods 14, thereby compressing the elastic member 11, causing the elastic member 11 to generate an elastic force. When the drill rod 1, the drill bit 4, the second arc-shaped rack 51 and other components are taken out of the casing mechanism, under the action of the elastic force of the elastic member 11, the connecting arm 7, the arc-shaped pressure plate 5, the second arc-shaped rack 51, the auxiliary arm 6 and the slider 13 return to their original positions, thereby facilitating the assembly of the second arc-shaped rack 51 with the first arc-shaped rack 23 during subsequent drilling, effectively reducing the time and labor intensity of the drilling operation, and effectively ensuring the drilling effect.

[0046] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A drilling follow-up casing device, characterized in that: The invention comprises a drill rod (1) and a drill bit (4) installed at the lower end of the drill rod (1); a bottom pipe (3) is arranged at the upper end of the drill bit (4), and the drill bit (4) extends into the bottom pipe (3); a connecting component is installed on the inner wall of the bottom pipe (3), and the bottom pipe (3) is located outside the drill rod (1); the inner wall of the connecting component is connected to the outer end of the drill bit (4); a plurality of casing components are equidistantly arranged on the outer side of the drill rod (1), and two adjacent casing components are fitted to each other, and the casing component located at the lowest side is fitted to the upper end of the bottom pipe (3); A plurality of connecting arms (7) are movably arranged at equal distances on both ends of the drill rod (1), and the connecting arms (7) are arranged in an inclined manner with the outer side lower and the inner side higher. The other ends of the plurality of connecting arms (7) are all installed with an arc-shaped pressure plate (5), and the arc-shaped pressure plate (5) is located on the outer side of the drill rod (1). The arc-shaped pressure plate (5) is located on the inner side of the casing assembly. The connecting arms (7) are movably connected to the return assembly toward the inner end, and the other end of the return assembly is connected to the outer end of the drill rod (1). A second arc-shaped rack (51) is installed at the lower end of the arc-shaped pressure plate (5). A plurality of auxiliary components are equidistantly arranged on the inner wall of the casing assembly, and the upper end of the auxiliary component is meshed with a second arc-shaped rack (51).

2. The drilling follow-up casing device according to claim 1, characterized in that: The return assembly comprises an auxiliary support arm (6), the auxiliary support arm (6) is movably arranged on the inner end of the connecting support arm (7), and the auxiliary support arm (6) is arranged in an inclined manner with the outer side lower and the inner side higher; a slider (13) is movably installed on the other end of the auxiliary support arm (6), the slider (13) is slidably connected to the installation groove (12), the installation groove (12) is arranged on the outer end of the drill rod (1), two round rods (14) are symmetrically installed inside the installation groove (12), the two round rods (14) both pass through the slider (13), and the slider (13) is slidably connected to the round rod (14); two elastic members (11) are symmetrically installed between the upper end of the slider (13) and the top end inside the installation groove (12), and the two elastic members (11) are respectively located on the outer sides of the two round rods (14).

3. The drilling follow-up casing device according to claim 1, characterized in that: The casing assembly comprises two semicircular sleeves (2), the two semicircular sleeves (2) are fitted to each other and arranged opposite to each other, the semicircular sleeves (2) are located outside the arc-shaped pressure plate (5), the inner end surface of the semicircular sleeve (2) is recessed outward to form a clamping groove (26), and the clamping groove (26) extends to the upper and lower ends of the semicircular sleeve (2), respectively, the clamping groove (26) is located outside the drill pipe (1), and the clamping strip (24) is installed on the inner end of the semicircular sleeve (2), and the clamping strip (24) is located in the clamping groove (26) on the other semicircular sleeve (2).

4. The drilling follow-up casing device according to claim 3, characterized in that: The inner wall of the clamping slot (26) is recessed outwardly to form a plurality of positioning holes (27), and a plurality of positioning columns (25) are equidistantly installed at the outer end of the clamping strip (24), and the plurality of positioning columns (25) are respectively located in the plurality of positioning holes (27).

5. The drilling follow-up casing device according to claim 3, characterized in that: The auxiliary component comprises two arc-shaped fixing plates (22), the two arc-shaped fixing plates (22) are respectively arranged on the inner walls of two semicircular sleeve plates (2), and the two arc-shaped fixing plates (22) are arranged opposite to each other, the two arc-shaped fixing plates (22) are fitted to each other, and the arc-shaped fixing plates (22) are located outside the drill rod (1), and the upper ends of the two arc-shaped fixing plates (22) are both installed with first arc-shaped racks (23), and the upper ends of the first arc-shaped racks (23) are meshed with second arc-shaped racks (51).

6. The drilling follow-up casing device according to claim 5, characterized in that: The connecting assembly comprises a first bevel gear (31), the first bevel gear (31) being mounted on the inner wall of the bottom tube (3), and the first bevel gear (31) being arranged in a narrow upper part and wide lower part, the lower end surface of the bottom tube (3) being overlapped with the lower end surface of the first bevel gear (31), a second bevel gear (41) being arranged at the upper outer end of the drill bit (4), and the second bevel gear (41) being located in the bottom tube (3), the outer end of the second bevel gear (41) being meshed with the inner wall of the first bevel gear (31), and the second bevel gear (41) being located on the inner side of the arc-shaped fixing plate (22), and the second bevel gear (41) being arranged in a narrow lower part and wide upper part.

7. The drilling follow-up casing device according to claim 3, characterized in that: A plurality of second U-shaped frames (32) are equidistantly mounted on the upper end of the bottom tube (3); the lower end surface of the semicircular sleeve plate (2) is recessed upward to form a plurality of grooves (28), and a second U-shaped frame (32) is placed in the groove (28) located at the lowermost side; and a plurality of first U-shaped frames (21) are equidistantly mounted on the upper end of the semicircular sleeve plate (2).

Images