Spiral deslagging drill bit structure

Abstract

The utility model relates to the technical field of drill bit technology, in particular to a spiral deslagging drill bit structure which comprises a connecting cylinder, a drill bit body and a drill bit body. The drilling wing assembly is formed by fixedly welding a plurality of wing plates distributed in an annular array mode, and a water outlet is formed in the middle of the upper end of the drilling wing assembly. A floating ball is arranged in an inner cavity of the non-return cavity and is of a hollow structure, the inner diameter of the through hole, the outer diameter of the floating ball and the inner diameter of the non-return cavity are sequentially increased, and the water through hole, the horn mouth, the through hole, the non-return cavity and the water outlet are sequentially communicated. The drilling device has the beneficial effects that the drilling wing assembly is connected to the lower end of the connecting cylinder, the drilling wing assembly is formed by welding and fixing the multiple wing plates, the water outlets are formed among the three wing plates, the floating ball moves upwards under the action of liquid buoyancy till the through hole is blocked, liquid in a drill hole cannot flow back to an inner cavity of the drilling rod, and the drilling efficiency is improved. Therefore, connection of a new drill rod does not need to wait for complete backflow and discharge of liquid, and waiting time consumption before connection of the drill rod is reduced.

Description

Technical Field

[0001] This utility model relates to the field of drill bit technology, specifically to a spiral slag discharge drill bit structure. Background Technology

[0002] In the drilling process, the drill bit is the main tool for breaking rocks. The wellbore is formed by the drill bit breaking rocks. The quality of the wellbore and the time it takes to form depend not only on the characteristics of the rock formation being drilled and the performance of the drill bit itself, but also on the degree of compatibility between the drill bit and the formation.

[0003] In the prior art, Chinese utility model publication number CN205189758U discloses a drilling bit that has the advantages of convenient on-site disassembly, quick replacement, shortened maintenance time, reduced costs, and improved drilling operation efficiency.

[0004] Currently, drill bits are generally used in conjunction with multi-section drill rods. Before the drill rods are spliced, the liquid in the water passages of the drill rods will flow back under pressure. As the drilling depth increases, the borehole and drill rod become longer, and more and more water accumulates in the drill rods, resulting in longer backwater drainage time. This leads to an increase in the time required for drill rod connection and a decrease in the drilling efficiency of the drill bit. To address these issues, this utility model proposes a spiral slag removal drill bit structure. Utility Model Content

[0005] The purpose of this invention is to provide a spiral slag discharge drill bit structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a spiral slag discharge drill bit structure, the spiral slag discharge drill bit structure comprising:

[0007] A connecting cylinder, wherein a water passage hole is provided inside the connecting cylinder, and a series of insertion slots arranged in a ring array are provided at the lower end of the connecting cylinder;

[0008] The drill wing assembly is composed of multiple blades arranged in a ring array and fixedly welded together. The edges of the blades are provided with drilling tools, reaming tools one and reaming tools two in sequence from bottom to top. The drill wing assembly is inserted into the inner cavity of the insertion slot from bottom to top and is adapted to it. The upper middle part of the drill wing assembly is provided with a water outlet, and the water outlet is connected to a water passage hole. A check cylinder is provided at the connection between the water outlet and the water passage hole.

[0009] The check valve cylinder has a check cavity and a through hole inside, and the inner wall of the through hole is arc-shaped. A float ball is installed in the inner cavity of the check cavity, and the float ball has a hollow structure. The inner diameter of the through hole, the outer diameter of the float ball, and the inner diameter of the check cavity increase sequentially. The upper end of the through hole forms a flared mouth. The water passage, the flared mouth, the through hole, the check cavity, and the water outlet are sequentially connected.

[0010] Preferably, the drilling tool is arranged in a stepped shape, and the drilling tool, the reaming tool one, and the reaming tool two form a tower-like structure with gradually increasing size.

[0011] Preferably, the upper end of the wing plate is provided with an installation groove, and the outer side wall of the check cylinder is fixed with a connecting boss, which is inserted into the inner cavity of the installation groove and fixedly connected by bolts.

[0012] Preferably, the lower end of the check cavity is connected to a hollow cylinder via a threaded connection, and the inner diameter of the hollow cylinder is smaller than the outer diameter of the float. The upper end of the hollow cylinder is provided with multiple water inlet grooves arranged in a ring array. The lower outer side of the hollow cylinder is fixedly fitted with a ring sealing plate, and the ring sealing plate fits against the lower end face of the check cylinder.

[0013] Preferably, the upper end of the connecting cylinder is provided with a drill rod docking groove, and a plurality of slag discharge blades arranged in a ring array are fixed on the outer side of the connecting cylinder, and the slag discharge blades have a spiral structure.

[0014] Preferably, an annular connecting plate is fixedly connected between two adjacent wing plates, and the annular connecting plate fits against the lower end face of the connecting cylinder and is fixedly connected to it by bolts.

[0015] Preferably, a countersunk screw hole is provided at the lower end of the surface of the connecting cylinder, and the countersunk bolt in the countersunk screw hole passes through the middle of the wing plate and fixes the wing plate to the connecting cylinder.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention features a drill blade assembly connected to the lower end of a connecting cylinder. The drill blade assembly consists of multiple welded and fixed blades, with an outlet between three blades. A check cylinder is installed at the connection point between the outlet and the inner cavity of the connecting cylinder. A check cavity is formed inside the check cylinder, with a through hole at its upper end. A hollow float is installed inside the check cavity. A hollow cylinder is threaded into the lower opening of the check cavity, with a water inlet groove on its upper surface. When the device stops working, the liquid in the borehole flows back through the outlet and into the inner cavity of the check cavity. At this time, the float moves upward under the buoyancy of the liquid until it blocks the through hole, preventing the liquid in the borehole from flowing back into the drill rod cavity. Therefore, connecting a new drill rod does not require waiting for the liquid to completely flow back out, thus improving the working efficiency of the drill bit by reducing the waiting time before connecting the drill rod. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is an exploded view of the drill wing assembly structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the check cylinder of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the connecting cylinder of this utility model;

[0022] Figure 5 This is a schematic diagram of the connection between the wing plate and the connecting cylinder in Embodiment 2 of this utility model;

[0023] Figure 6 This is a three-dimensional schematic diagram of the connecting cylinder structure in Embodiment 3 of this utility model.

[0024] In the diagram: 1. Connecting cylinder; 11. Water passage hole; 12. Insertion groove; 13. Slag discharge blade; 14. Drill rod docking groove; 15. Countersunk screw hole; 2. Drill wing assembly; 3. Wing plate; 31. Drilling tool; 32. Reamer tool one; 33. Reamer tool two; 34. Water outlet; 35. Mounting groove; 36. Annular connecting plate; 4. Check cylinder; 41. Check cavity; 42. Float ball; 43. Through hole; 44. Trumpet mouth; 45. Connecting boss; 5. Hollow cylinder; 51. Water inlet groove; 52. Annular sealing plate. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] Example 1, please refer to Figures 1-6 This utility model provides a technical solution: a spiral slag discharge drill bit structure, which includes: a connecting cylinder 1 and a drill wing assembly 2.

[0027] Specifically, a water passage hole 11 is provided inside the connecting cylinder 1 for liquid transportation, and a series of insertion slots 12 arranged in a ring array are provided at the lower end of the connecting cylinder 1.

[0028] Secondly, the drill wing assembly 2 is composed of multiple blades 3 arranged in a ring array and fixedly welded together. From bottom to top, the edges of the blades 3 are sequentially equipped with a drilling tool 31, a first reamer 32, and a second reamer 33. The drilling tool 31 is used for drilling, while the first reamer 32 and the second reamer 33 are used for reaming holes of different diameters, thereby improving the forming efficiency of large-diameter drilling. The drill wing assembly 2 is inserted into and fitted into the inner cavity of the insertion slot 12 from bottom to top. The entire drill wing assembly 2 is welded and fixed to the connecting cylinder 1 to prevent separation. The connecting cylinder 1 of this device is connected to the drill rod... The drill rod is connected in a row. When the drill rod rotates, it can drive the connecting cylinder 1 and the drill blade assembly 2 to rotate accordingly. A water outlet 34 is provided in the middle of the upper end of the drill blade assembly 2, and the water outlet 34 is connected to the water passage 11. The liquid in the cavity of the water passage 11 can be thrown out from the water outlet 34 to flush the debris generated during drilling and to cool the device. A check cylinder 4 is provided at the connection between the water outlet 34 and the water passage 11. The check cylinder 4 is used to prevent the liquid in the cavity of the drill hole from flowing back into the drill rod, so that the device does not need to wait for the liquid to flow back when connecting a new drill rod.

[0029] Furthermore, a check cavity 41 and a through hole 43 are provided inside the check cylinder 4, and the inner wall of the through hole 43 is arc-shaped. A float 42 is provided inside the check cavity 41, and the float 42 has a hollow structure. The inner diameter of the through hole 43, the outer diameter of the float 42, and the inner diameter of the check cavity 41 increase sequentially. Figure 3 As shown, the float 42 is mainly used to block the through hole 43. Since the float 42 is a hollow structure, when the liquid flows from bottom to top in the check cavity 41, the check cavity 41 will be filled with liquid. At this time, the float 42 moves upward under the action of buoyancy until it blocks the through hole 43, thus preventing the liquid in the check cavity 41 from flowing upward from the through hole 43, thereby preventing the liquid in the borehole cavity from flowing back into the drill pipe. When the drill pipe allows liquid to enter from the outside... When the body is in operation, the liquid pressure inside the drill rod is greater than the liquid pressure inside the check cavity 41. Under hydraulic pressure, the float 42 separates from the through hole 43, allowing external liquid to be normally sent into the check cavity 41 until it enters the borehole. In addition, the upper end of the through hole 43 forms a bell mouth 44. The water passage 11, the bell mouth 44, the through hole 43, the check cavity 41, and the outlet 34 are connected in sequence to ensure that the liquid inside the drill rod at the upper end of the connecting cylinder 1 can be smoothly discharged from the outlet 34.

[0030] In order to form the actual required drill hole, the drilling tool 31 of this application is set in a stepped shape. When the drill rod rotates, the drilling tool 31 is mainly used to initially form the drill hole. The drilling tool 31, the reaming tool 1 32 and the reaming tool 2 33 form a tower-like structure with gradually increasing size, which can be used to gradually enlarge the initially formed drill hole. Since the drill wing assembly 2 is inserted into the insertion slot 12 at the lower end of the connecting cylinder 1, there will be no relative rotation between the drill wing assembly 2 and the connecting cylinder 1.

[0031] To improve the overall strength of the drill wing assembly 2, this application also includes a mounting groove 35 at the upper end of the wing plate 3, and a connecting boss 45 fixed to the outer wall of the check cylinder 4. The connecting boss 45 is inserted into the inner cavity of the mounting groove 35 and fixedly connected by bolts. Figure 2 and Figure 3 As shown, the connecting boss 45 can be housed in the inner cavity of the mounting groove 35, and after the two are fixedly connected by bolts, the check cylinder 4 and the connecting boss 45 can also fix the upper ends of multiple blades 3 together, thereby preventing the upper ends of the blades 3 from opening outward under the action of centrifugal force when the device rotates at high speed, thus preventing deformation. Therefore, after the check cylinder 4, the connecting boss 45 and the upper end of the drill blade assembly 2 are fixedly connected, the overall strength of the drill blade assembly 2 can be effectively improved.

[0032] To prevent the float 42 from detaching from the inner cavity of the check cavity 41, this application further includes a hollow cylinder 5 connected to the lower inner cavity of the check cavity 41 via a threaded connection. The inner diameter of the hollow cylinder 5 is smaller than the outer diameter of the float 42. The hollow cylinder 5 is used to limit the movement of the float 42, preventing it from detaching from the lower end of the inner cavity of the check cavity 41. The upper end of the hollow cylinder 5 has multiple water inlet grooves 51 arranged in a ring array. Regardless of the position of the float 42 within the inner cavity of the check cavity 41, the liquid in the hollow cylinder 5 and the inner cavity of the check cavity 41 can exchange with each other through the water inlet grooves 51. An annular sealing plate 52 is fixedly sleeved on the outer side of the lower end of the hollow cylinder 5, and the annular sealing plate 52 fits against the lower end face of the check cylinder 41. The annular sealing plate 52 is mainly used to limit the depth of the hollow cylinder 5 extending into the inner cavity of the check cavity 41.

[0033] In order to remove debris in a timely manner during drilling, this application also has a drill rod docking groove 14 at the upper end of the connecting cylinder 1, which facilitates the threaded connection and fixation of the drill rod and the connecting cylinder 1. Multiple slag discharge blades 13 arranged in a ring array are fixed on the outside of the connecting cylinder 1, and the slag discharge blades 13 have a spiral structure. When the drill rod drives the connecting cylinder 1 to rotate, the slag discharge blades 13 rotate accordingly, thereby enabling the debris generated during drilling to be discharged outward in a timely manner.

[0034] In Embodiment Two, based on Embodiment One, to facilitate the disassembly and separation of the drill blade assembly 2 from the connecting cylinder 1, this application may further include a fixedly connected annular connecting plate 36 between two adjacent blades 3. The annular connecting plate 36 fits against the lower end face of the connecting cylinder 1 and is fixedly connected to it with bolts. Figure 5 As shown, multiple annular connecting plates 36, together with bolts, can maintain a stable connection with the connecting cylinder 1, thereby ensuring that the drill blade assembly 2 and the connecting cylinder 1 are detachable fixed connection structures.

[0035] In embodiment three, based on embodiment one, to facilitate the disassembly and separation of the drill blade assembly 2 from the connecting cylinder 1, this application may further provide a countersunk screw hole 15 at the lower end of the surface of the connecting cylinder 1. A countersunk bolt in the countersunk screw hole 15 penetrates the middle of the blade 3 and fixes the blade 3 to the connecting cylinder 1. Figure 6 As shown, by opening a countersunk screw hole 15 on the side of the connecting cylinder 1, the drill blade assembly 2 in Embodiment 1 can be fixedly connected to the connecting cylinder 1 using countersunk bolts. In addition, it should be noted that the opening of the countersunk screw hole 15 and the installation of the countersunk bolt in the inner cavity of the countersunk screw hole 15 need to be staggered from the slag discharge blade 13 on the outside of the connecting cylinder 1 to avoid mutual interference.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw discharge drill bit structure, characterized by: The spiral deslagging drill bit structure comprises: A connecting barrel (1) is internally provided with a water passage (11), and the lower end of the connecting barrel (1) is provided with a plurality of annularly distributed plug-in slots (12); A drill wing assembly (2) is annularly and fixedly welded by a plurality of wing plates (3), the edges of the wing plates (3) are sequentially provided from bottom to top with a drilling cutter (31), a reaming cutter I (32) and a reaming cutter II (33), the drill wing assembly (2) is inserted into and matched with the inner cavity of the plug-in slot (12) from bottom to top, the upper end of the drill wing assembly (2) is provided with a water outlet (34) which is communicated with the water passage (11), and the water outlet (34) and the water passage (11) are provided with a check barrel (4) at the communication position. The check barrel (4) is internally provided with a check cavity (41) and a through hole (43), the inner wall of the through hole (43) is in a circular arc shape, the check cavity (41) is provided with a hollow ball (42), the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, and the check cavity (41) has an inner diameter, and the through hole (43) has an inner diameter, the ball (42) has an outer diameter, 2. The spiral dredge bit structure of claim 1, wherein: ​ 3. A spiral dredge bit structure as defined in claim 2, wherein: ​ 4. The spiral dredge bit structure of claim 3, wherein: ​ 5. The structure of a spiral discharge drill bit according to claim 4, characterized in that: ​ 6. The structure of a spiral discharge drill bit according to claim 1, characterized in that: ​ 7. The spiral discharge drill bit structure of claim 1, wherein: ​

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