Geological coring drilling tool capable of realizing continuous drilling along with casing

Abstract

The utility model belongs to the technical field of exploration drilling tools, in particular to a geological coring drilling tool capable of realizing continuous drilling along with a casing, which comprises a casing body, a drill rod sleeved in the casing body, a female joint fixedly connected to the bottom end of the drill rod, a male joint in threaded connection to the bottom end of the female joint, a reaming shell fixedly connected to the bottom end of the male joint, and a drilling rod connected with the reaming shell. A reaming drill bit is arranged on the surface of the reaming shell, an adjusting mechanism is arranged between one side of the reaming drill bit and the interior of the reaming shell, and fixing rods are fixedly connected to the two sides of the bottom of the reaming shell. The external expanding drilling diameter of the expanding drill bit can be adjusted, so that holes with different sizes can be drilled according to requirements, the drilling device is more flexible in use and very convenient and rapid to adjust, in addition, the pilot hole drill bit can be conveniently disassembled and assembled, and the drilling efficiency is improved. Therefore, the damaged collar hole drill bit can be independently detached to be replaced, operation is easy, and the maintenance cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of exploration drilling tools, in particular to a geological coring drilling tool which can realize continuous casing drilling. Background Art

[0002] When drilling in broken strata or gravel strata, complex accidents such as block falling, diameter shrinkage and even hole collapse are very likely to occur. When conventional mud wall protection and impact drilling clay wall protection methods cannot effectively stabilize the hole wall or a large amount of mud loss occurs, it is necessary to use casing drilling technology to maintain the stability of the hole wall.

[0003] A Chinese patent application CN220059488U discloses a geological coring drill that can achieve continuous casing drilling, which belongs to the field of exploration drilling technology and consists of a drill rod assembly, a casing assembly and a rock crushing assembly; the drill rod assembly is used to provide a rotary torque for the bottom rock crushing assembly, the casing assembly achieves casing drilling through the action of a reducer, and the rock crushing assembly can extend and retract the expansion block through the positioning rod. In addition, the straightening bearing can straighten the drill rod and the casing to prevent wear of the drill rod. In summary, the utility model can effectively achieve casing drilling in deep well operations without affecting the work of lifting the drill and coring, has a simple structure, and is easy to replace wearing parts, and has high practical value.

[0004] In view of the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: the existing geological coring drill tools that can achieve continuous drilling with casing often have a fixed outer expansion diameter of the reaming drill bit, and therefore cannot be adjusted according to drilling needs, which is relatively limited in use, and the collar drill bit often drills directly into hard geology, which is easy to be damaged and inconvenient to replace it separately. However, replacing the entire outer expansion drill bit and collar drill bit assembly as a whole increases the maintenance cost of the drill bit; therefore, in view of the above problems, a geological coring drill tool that can achieve continuous drilling with casing is proposed. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art, the problem that the outer expansion diameter of the reaming drill bit is often fixed and cannot be adjusted according to the drilling needs, which is relatively limited in use, and the collar drill bit is often used for direct drilling of hard geology, which is easy to be damaged and inconvenient to replace it separately, while the entire outer expansion drill bit and the collar drill bit assembly are replaced as a whole, which increases the maintenance cost of the drill bit, the utility model proposes a geological coring drill tool that can realize continuous casing drilling.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model describes a geological coring drill tool capable of realizing continuous casing drilling, comprising a casing body, a drill pipe is sleeved inside the casing body, the bottom end of the drill pipe is fixedly connected to a female joint, the bottom end of the female joint is threadedly connected to a male joint, the bottom end of the male joint is fixedly connected to a reaming shell, a reaming drill bit is arranged on the surface of the reaming shell, an adjustment mechanism is jointly arranged between one side of the reaming drill bit and the inside of the reaming shell, fixing rods are fixedly connected to the two sides of the bottom of the reaming shell, a collar drill bit is jointly arranged at the bottom ends of the two fixing rods, drilling fluid channels are opened on the two sides of the interior of the drill pipe, a moving rod is slidably connected to the inner bottom end of the drill pipe, and the moving rod The top end of the rod is fixedly connected to a limited position block, and the bottom end of the movable rod is fixedly connected to a baffle. When the geological state is being studied, the drill rod is driven to rotate by an external power, and the connection between the male joint and the female joint enables the drill rod to drive the reaming shell to rotate, so that the reaming drill bit inside the reaming shell drills and drills the geology, and the leading hole drill bit is driven by the fixed rod to drill and drill holes. After drilling, the geological borehole can be more easily expanded and drilled with a larger aperture by the reaming drill bit. During drilling, drilling fluid is injected from the surface into the well, and then enters the position below the drill rod through the drilling fluid channel. At the same time, the baffle rises upward under the action of buoyancy until the drilling fluid is filled and the baffle blocks the drilling fluid channel. The surface pump pressure suddenly increases, and the full state of the core can be judged.

[0007] Preferably, the adjustment mechanism comprises a sliding sleeve, the sliding sleeve is fixedly connected to the bottom of the reaming shell, and a threaded rod is slidably connected inside the sliding sleeve.

[0008] Preferably, the top end of the threaded rod passes through the bottom of the hole-expanding shell and is rotatably connected to the inner top wall of the hole-expanding shell, and the bottom end of the threaded rod is fixedly connected with an adjustment handle.

[0009] Preferably, a threaded sleeve is threadedly connected to the surface of the threaded rod, and the threaded sleeve is located inside the reaming shell. A movable part is rotatably connected to the surface of the threaded sleeve, and one end of the movable part is rotatably connected to one side of the reaming drill bit.

[0010] Preferably, the adjusting mechanism also includes a support rod, the bottom end of the support rod is fixedly connected to the inner bottom side of the reaming shell, the top end of the support rod is rotatably connected to the bottom of the reaming drill bit, the support rod and the surface of the reaming shell are provided with a movable hole, and one side of the reaming drill bit extends to the outside of the reaming shell through the movable hole. The external expansion drilling diameter of the reaming drill bit can be adjusted by setting the adjusting mechanism, so that holes of different sizes can be drilled as needed, which is more flexible in use and very convenient and quick to adjust.

[0011] Preferably, slots are provided on both sides of the top of the collar drill bit, the bottom end of the fixing rod is inserted into the inside of the slot, and through holes are provided on both sides of the collar drill bit, and the through holes are located on one side of the slot.

[0012] Preferably, a threaded hole is provided on one side of the fixing rod, and bolts are provided on both sides of the collar hole drill bit, and the bolts pass through the through hole and are threadedly connected to the inside of the threaded hole. Through the arrangement of the slot, threaded hole and bolts, the collar hole drill bit can be easily disassembled and installed, so that the damaged collar hole drill bit can be separately disassembled and replaced, which is simple to operate and saves maintenance costs.

[0013] The utility model is beneficial in that:

[0014] 1. The utility model sets an adjusting mechanism, rotates the adjusting handle, and the adjusting handle drives the threaded rod to rotate. Since the threaded rod slides in the sliding sleeve, the height of the threaded rod remains unchanged, so that the threaded sleeve moves up and down. The threaded sleeve drives one side of the reaming drill bit to move up and down through the movable part, and the support rod is used to prevent the other side of the reaming drill bit from moving up and down, so that the reaming drill bit can swing obliquely as a whole, so that the drill principle of the drill bit that leaks out of the reaming shell body or approaches the axis of the threaded rod, so that the diameter of the hole drilled by the reaming drill bit changes. Therefore, the outer expansion drilling diameter of the reaming drill bit can be adjusted through the setting of the adjusting mechanism, so that holes of different sizes can be drilled as needed, which is more flexible in use and very convenient and quick to adjust.

[0015] 2. The utility model adopts the arrangement of slots, threaded holes and bolts, etc., so that the bolt is taken out from the threaded hole, and then the bottom end of the fixing rod is pulled out from the slot, so that the collar hole drill bit can be disassembled. Similarly, the bottom end of the fixing rod is inserted into the slot, and then the bolt is passed through the through hole and connected with the threaded hole, so that the collar hole drill bit is installed. The arrangement of slots, threaded holes and bolts, etc. can facilitate the disassembly and installation of the collar hole drill bit, so that the damaged collar hole drill bit can be disassembled separately for replacement, which is simple to operate and saves maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the overall internal structure of the utility model;

[0019] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the structure of the adjustment mechanism of the utility model;

[0021] Figure 5 It is a schematic diagram of the connection structure between the fixing rod and the collar hole drill bit of the utility model.

[0022] In the figure: 1. casing body; 2. drill pipe; 3. female joint; 4. male joint; 5. reaming shell; 6. reaming drill bit; 7. adjusting mechanism; 71. sliding sleeve; 72. threaded rod; 73. adjusting handle; 74. threaded sleeve; 75. movable part; 76. support rod; 77. movable hole; 8. fixing rod; 9. collar drill bit; 10. drilling fluid channel; 11. moving rod; 12. limit block; 13. baffle; 14. slot; 15. through hole; 16. threaded hole; 17. bolt. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5As shown, a geological coring drill tool capable of realizing continuous casing drilling comprises a casing body 1, a drill pipe 2 is sleeved inside the casing body 1, a female joint 3 is fixedly connected to the bottom end of the drill pipe 2, a male joint 4 is threadedly connected to the bottom end of the female joint 3, a reaming shell 5 is fixedly connected to the bottom end of the male joint 4, a reaming drill bit 6 is arranged on the surface of the reaming shell 5, an adjustment mechanism 7 is commonly arranged between one side of the reaming drill bit 6 and the inside of the reaming shell 5, fixed rods 8 are fixedly connected to the bottom sides of the reaming shell 5, a collar drill bit 9 is commonly arranged at the bottom ends of the two fixed rods 8, drilling fluid channels 10 are opened on both sides of the inside of the drill pipe 2, a moving rod 11 is slidably connected to the bottom end of the drill pipe 2, a limiting block 12 is fixedly connected to the top end of the moving rod 11, and a bottom end of the moving rod 11 A baffle 13 is fixedly connected. When the geological state is being studied, the drill pipe 2 is driven to rotate by an external power, and the connection between the male joint 4 and the female joint 3 enables the drill pipe 2 to drive the reaming shell 5 to rotate, so that the reaming drill bit 6 inside the reaming shell 5 drills and drills the geology, and the leading hole drill bit 9 is driven by the fixed rod 8 to drill and drill holes. After drilling, the geological borehole can be more easily expanded by the reaming drill bit 6 to increase the aperture. During drilling, drilling fluid is injected from the surface into the well, and then enters the position below the drill pipe 2 through the drilling fluid channel 10. At the same time, the baffle 13 rises upward under the action of buoyancy until the drilling fluid is filled and the baffle 13 blocks the drilling fluid channel 10. The surface pump pressure suddenly increases, and the core is full.

[0025] The adjusting mechanism 7 comprises a sliding sleeve 71 , which is fixedly connected to the bottom of the reaming shell 5 , and a threaded rod 72 is slidably connected inside the sliding sleeve 71 .

[0026] The top end of the threaded rod 72 passes through the bottom of the hole-expanding shell 5 and is rotatably connected to the inner top wall of the hole-expanding shell 5 , and the bottom end of the threaded rod 72 is fixedly connected with an adjusting handle 73 .

[0027] The surface of the threaded rod 72 is threadedly connected with a threaded sleeve 74, which is located inside the reaming shell 5. The surface of the threaded sleeve 74 is rotatably connected with a movable part 75, and one end of the movable part 75 is rotatably connected to one side of the reaming drill bit 6.

[0028] The adjusting mechanism 7 further comprises a support rod 76, the bottom end of which is fixedly connected to the inner bottom side of the reaming shell 5, the top end of which is rotatably connected to the bottom of the reaming drill bit 6, the support rod 76 and the surface of the reaming shell 5 are provided with a movable hole 77, and one side of the reaming drill bit 6 extends to the outside of the reaming shell 5 through the movable hole 77. The external expansion drilling diameter of the reaming drill bit 6 can be adjusted by setting the adjusting mechanism 7, so that holes of different sizes can be drilled as needed. When adjusting, the adjusting handle 73 is rotated by external force, and the adjusting handle 7 The threaded rod 72 is driven to rotate. Since the threaded rod 72 slides in the sliding sleeve 71, the height of the threaded rod 72 remains unchanged, so that the threaded sleeve 74 moves up and down. The threaded sleeve 74 drives one side of the reaming drill bit 6 to move up and down through the movable member 75, and the other side of the reaming drill bit 6 is prevented from moving up and down by the support rod 76, so that the reaming drill bit 6 can swing obliquely as a whole, so that the drill principle of the part leaking out of the reaming housing 5 or close to the axis of the threaded rod 72, so that the hole diameter drilled by the reaming drill bit 6 changes.

[0029] Among them, slots 14 are opened on both sides of the top of the collar hole drill bit 9, the bottom end of the fixing rod 8 is inserted into the inside of the slot 14, and through holes 15 are opened on both sides of the collar hole drill bit 9, and the through holes 15 are located on one side of the slot 14.

[0030] Among them, a threaded hole 16 is opened on one side of the fixing rod 8, and bolts 17 are arranged on both sides of the collar drill bit 9. The bolts 17 pass through the through hole 15 and are threadedly connected to the inside of the threaded hole 16. The bolts 17 are taken out from the threaded hole 16, and then the bottom end of the fixing rod 8 is pulled out from the slot 14, so that the collar drill bit 9 can be removed. Similarly, the bottom end of the fixing rod 8 is inserted into the slot 14, and then the bolts 17 pass through the through hole 15 and are connected to the threaded hole 16, so that the collar drill bit 9 is installed.

[0031] Working principle: when the geological state is being studied, the drill pipe 2 is driven to rotate by an external power, and the male connector 4 and the female connector 3 are connected to make the drill pipe 2 drive the reaming shell 5 to rotate, so that the reaming drill bit 6 inside the reaming shell 5 drills and drills the geological state, and the leading hole drill bit 9 is driven by the fixing rod 8 to drill and drill holes. After drilling, the geological borehole can be more easily expanded by the reaming drill bit 6 to increase the aperture. During drilling, the drilling fluid is injected from the surface into the well, and then enters the position below the drill pipe 2 through the drilling fluid channel 10. At the same time, the baffle 13 rises upward under the action of buoyancy until the drilling fluid is filled and the baffle 13 blocks the drilling fluid channel 10. The surface pump pressure suddenly increases, and the core is full.

[0032] The outer expansion drilling diameter of the reaming drill bit 6 can be adjusted by setting the adjustment mechanism 7, so that holes of different sizes can be drilled as needed. When adjusting, the adjustment handle 73 is rotated by external force, and the adjustment handle 73 drives the threaded rod 72 to rotate. Since the threaded rod 72 slides in the sliding sleeve 71, the height of the threaded rod 72 remains unchanged, so that the threaded sleeve 74 moves up and down, and the threaded sleeve 74 drives one side of the reaming drill bit 6 to move up and down through the movable member 75, and the other side of the reaming drill bit 6 is prevented from moving up and down by using the support rod 76, so that the reaming drill bit 6 can swing obliquely as a whole, so that the drill principle of the part leaking out of the reaming housing 5 or close to the axis of the threaded rod 72, so the diameter of the hole drilled by the reaming drill bit 6 changes, so that the outer expansion drilling diameter of the reaming drill bit 6 can be adjusted by setting the adjustment mechanism 7, so that holes of different sizes can be drilled as needed, which is more flexible when used and the adjustment is also very convenient and quick;

[0033] The bolt 17 is taken out from the threaded hole 16, and then the bottom end of the fixing rod 8 is pulled out from the slot 14, so that the collar hole drill bit 9 can be removed. Similarly, the bottom end of the fixing rod 8 is inserted into the slot 14, and then the bolt 17 is passed through the through hole 15 and connected with the threaded hole 16, so that the collar hole drill bit 9 is installed. Through the arrangement of the slot 14, the threaded hole 16 and the bolt 17, the collar hole drill bit 9 can be easily disassembled and installed, so that the damaged collar hole drill bit 9 can be removed separately for replacement, which is simple to operate and saves maintenance costs.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A geological coring drill capable of achieving continuous casing drilling, comprising a casing body (1), characterized in that: A drill pipe (2) is sleeved inside the casing body (1), the bottom end of the drill pipe (2) is fixedly connected to a female joint (3), the bottom end of the female joint (3) is threadedly connected to a male joint (4), the bottom end of the male joint (4) is fixedly connected to a reaming shell (5), a reaming drill bit (6) is arranged on the surface of the reaming shell (5), an adjustment mechanism (7) is arranged between one side of the reaming drill bit (6) and the inside of the reaming shell (5), fixed rods (8) are fixedly connected to the two sides of the bottom of the reaming shell (5), a leading drill bit (9) is arranged at the bottom ends of the two fixed rods (8), drilling fluid channels (10) are opened on the two sides of the inside of the drill pipe (2), a moving rod (11) is slidably connected to the bottom end of the drill pipe (2), the top end of the moving rod (11) is fixedly connected to a limiting block (12), and the bottom end of the moving rod (11) is fixedly connected to a baffle (13).

2. A geological coring drill capable of achieving continuous casing drilling according to claim 1, characterized in that: The adjusting mechanism (7) comprises a sliding sleeve (71), wherein the sliding sleeve (71) is fixedly connected to the bottom of the hole-expanding shell (5), and a threaded rod (72) is slidably connected inside the sliding sleeve (71).

3. A geological coring drill capable of achieving continuous casing drilling according to claim 2, characterized in that: The top end of the threaded rod (72) passes through the bottom of the hole-expanding shell (5) and is rotatably connected to the inner top wall of the hole-expanding shell (5), and the bottom end of the threaded rod (72) is fixedly connected to an adjustment handle (73).

4. A geological coring drill capable of achieving continuous casing drilling according to claim 2, characterized in that: The surface of the threaded rod (72) is threadedly connected with a threaded sleeve (74), the threaded sleeve (74) is located inside the reaming shell (5), the surface of the threaded sleeve (74) is rotatably connected with a movable part (75), and one end of the movable part (75) is rotatably connected to one side of the reaming drill bit (6).

5. A geological coring drill capable of achieving continuous casing drilling according to claim 4, characterized in that: The adjustment mechanism (7) further comprises a support rod (76), the bottom end of which is fixedly connected to the inner bottom side of the reaming shell (5), the top end of which is rotatably connected to the bottom of the reaming drill bit (6), the support rod (76) and the surface of the reaming shell (5) are provided with a movable hole (77), and one side of the reaming drill bit (6) passes through the movable hole (77) and extends to the outside of the reaming shell (5).

6. The geological coring drill capable of achieving continuous casing drilling according to claim 1, characterized in that: Slots (14) are provided on both sides of the top of the collar drill bit (9), the bottom end of the fixing rod (8) is inserted into the inside of the slots (14), and through holes (15) are provided on both sides of the collar drill bit (9), and the through holes (15) are located on one side of the slots (14).

7. A geological coring drill capable of achieving continuous casing drilling according to claim 6, characterized in that: A threaded hole (16) is provided on one side of the fixing rod (8), bolts (17) are provided on both sides of the collar drill bit (9), and the bolts (17) pass through the through hole (15) and are threadedly connected to the inside of the threaded hole (16).

Images