CN221761817U - Cone type hydrogeology well drilling reamer bit - Google Patents

Abstract

The utility model discloses a roller-type hydrogeological well drilling and hole enlarging drill bit, comprising a roller-type drill bit and a directional rod. The directional rod is extended into a hole before the hole is enlarged for drilling guidance, so as to prevent the drill bit from being enlarged deviated during the hole enlarging process. A sleeve ring with an inclined angle relative to the axial direction is extended on the roller-type drill bit, and the roller is fixedly installed in a direction perpendicular to the inner side surface of the sleeve ring, so that the drill bit has a compacting effect on the geological structure outside the installation groove and the directional rod when the hole is enlarged and drilled, thereby reducing the occurrence of hole collapse on the wall of the hydrogeological well during the construction process. The rotating direction of the roller has a certain inclined angle relative to the drilling direction, which can also reduce the wear of the end face of the roller structure to a certain extent, thereby ensuring the hole enlarging quality as a whole, improving the hole enlarging efficiency, shortening the construction period and saving costs.

Description

A cone-type hydrogeological well drilling and hole enlarging drill bit

Technical Field

The utility model relates to the technical field of hydrogeological drilling and hole enlarging construction, and more specifically, to a cone-type hydrogeological well drilling and hole enlarging drill bit.

Background Art

Hydrogeological drilling is the main technical method of using special machines to drill holes in the rock and soil layer to directly obtain the geological and hydrogeological data of the target point and target depth. It is also an important technical means to discover and utilize groundwater. According to different technical requirements and the need to place water filter pipes, the borehole diameter formed by hydrogeological drilling is often larger than that formed by conventional engineering geological drilling. Therefore, compared with conventional engineering geological drilling, the process of hydrogeological drilling generally involves the step of hole expansion.

In the construction of hydrogeological drilling and hole expansion, drillers often use conventional diamond drill bits or composite drill bits for hole expansion. These drill bits are not difficult to drill when drilling soil or rock layers, but when encountering a pebble layer, the difficulty of hole expansion increases sharply. There are usually the following problems: (1) The drill bit is consumed during the hole expansion process. As the hole diameter increases during hole expansion, the composite drill bit or diamond drill bit needs to contact the pebbles more, causing the drill bit to wear faster than when not expanding the hole. The cutting effect of the drill bit on the pebbles gradually weakens, causing the drill bit hole expansion speed to gradually slow down; (2) The roller drill bit is prone to deviation during hole expansion; (3) The wall of the hydrological well collapses during the construction process. These problems seriously affect the progress and construction safety of the hydrogeological drilling and hole expansion process, and also increase the cost of drilling rig construction.

Utility Model Content

The utility model aims to provide a cone-type hydrogeological well drilling and hole enlarging drill bit to solve the technical problem that the quality of hole enlarging is difficult to ensure during hole enlarging operation in hydrogeological drilling and hole enlarging construction in the prior art.

In order to achieve these purposes and other advantages according to the utility model, a cone-type hydrogeological well drilling and reaming drill bit is provided, comprising:

A roller drill bit, comprising a drill seat, the drill seat is in a truncated cone structure as a whole, a threaded joint is arranged on the outer wall of the smaller diameter end of the drill seat, a ring is arranged on the larger diameter end of the drill seat to extend outwardly obliquely, a plurality of rollers are arranged at intervals along the circumferential direction on the inner side of the ring, the axial direction of the rollers is perpendicular to the inner side of the ring and the outer end of the rollers is arranged beyond the edge of the ring, and a mounting groove is extended and connected in the middle of the drill seat along the axial direction toward between the plurality of rollers;

A directional rod, which includes a head, a waist, and a tail arranged in sequence in the axial direction. The head is used to be connected and fixed to the mounting groove, and the tail is used to be inserted into the hole to be expanded. The diameter of the waist is larger than the inner diameter of the groove of the mounting groove, and the edge of the waist facing the tail does not exceed the outer end edge of the gear, and the outer diameter of the tail is smaller than the outer diameter of the waist.

Preferably, the tail portion of the directional rod is configured as a plug structure.

Preferably, a thread is provided in the notch of the installation slot, and the head of the directional rod extends into the notch of the installation slot and is connected by the thread.

Preferably, the installation slot has a plurality of grooves spaced circumferentially at the outer end on one side of the slot, and the head end face of the directional rod has elastic clips spaced circumferentially corresponding to the grooves, the elastic clips being used to snap into the grooves for positioning.

Preferably, the tail portion of the directional rod includes a first rod segment and a second rod segment arranged in sequence along the axial direction, the first rod segment is located between the waist of the directional rod and the second rod segment, a spiral groove is axially arranged on the first rod segment, the spiral groove and the thread rotation direction in the installation groove are opposite, and the first rod segment is provided with convex teeth on both sides of the extension path of the spiral groove.

Preferably, cutting pieces are connected at intervals along the circumferential direction between the end surface of the waist of the directional rod facing the tail and the first rod segment.

The utility model includes at least the following beneficial effects: the utility model comprises a roller-type hydrogeological well drilling and reaming drill bit, which comprises a roller-type drill bit and a directional rod, wherein the directional rod is extended into the hole opening before reaming to guide drilling, thereby preventing the drill bit from skewing during reaming; a sleeve ring having an inclined angle relative to the axial direction is extended on the roller-type drill bit, and the roller is fixedly installed in a direction perpendicular to the inner side surface of the sleeve, so that the drill bit has a compacting effect on the geological structure outside the installation groove and the directional rod during reaming drilling, thereby reducing the possibility of hole collapse on the wall of the hydrogeological well during construction; the rotation direction of the roller has a certain inclination angle relative to the drilling direction, and can also reduce the wear of the end face of the roller structure to a certain extent, thereby ensuring the reaming quality as a whole, improving the reaming efficiency, shortening the construction period and saving costs.

Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a front view of the utility model in the radial direction after assembly;

FIG. 2 is a front structural diagram of a directional rod according to an embodiment of the present invention.

Explanation of the reference numerals in the drawings in the specification: 1. drill bit seat, 2. threaded joint, 3. collar, 4. gear, 5. mounting groove, 6. directional rod, 7. head, 8. waist, 9. tail, 10. thread, 11. groove, 12. elastic clip, 13. first rod segment, 14. second rod segment, 15. spiral groove, 16. convex tooth, 17. cutting disc.

DETAILED DESCRIPTION

The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

In the description of the present invention, terms such as "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

As shown in Figures 1 and 2, the utility model of the cone-type hydrogeological well drilling and hole enlarging drill bit includes:

A roller drill bit, comprising a drill bit seat 1, the drill bit seat 1 is in a truncated cone structure as a whole, a threaded joint 2 is arranged on the outer wall of the smaller diameter end of the drill bit seat 1, a ring 3 is arranged on the larger diameter end of the drill bit seat 1 to extend outwardly obliquely, a plurality of rollers 4 are arranged at intervals along the circumferential direction on the inner side of the ring 3, the axial direction of the rollers 4 is perpendicular to the inner side of the ring 3 and the outer end of the rollers 4 is arranged beyond the edge of the ring 3, a mounting groove 5 is extended and connected in the middle part of the drill bit seat 1 along the axial direction toward between the plurality of rollers 4, and the mounting groove 5 does not interfere with the operation of the rollers 4;

The directional rod 6 includes a head 7, a waist 8, and a tail 9 which are arranged in sequence in the axial direction. The head 7 is used to be connected and fixed to the mounting groove 5, and the tail 9 is used to be inserted into the hole to be expanded. The diameter of the waist 8 is larger than the inner diameter of the groove of the mounting groove 5, and the edge of the waist 8 facing the tail 9 does not exceed the outer end edge of the gear 4, and the outer diameter of the tail 9 is smaller than the outer diameter of the waist 8.

The cone-type hydrogeological well drilling and hole enlarging drill bit of the utility model can be carried out in the following steps in practical application:

Step 1: The drilling rig uses a small-diameter drill bit to drill to a predetermined depth, and performs geological logging and sampling during the drilling process.

Step 2: Expand the hole, assemble and connect the directional rod 6 and the roller drill bit, and then install the assembled roller drill bit on the drilling rig through the threaded joint 2 to start the first round of hole expansion.

Step 3: The subsequent rounds of hole expansion repeat the contents of the first round of hole expansion. Due to the presence of the directional rod 6, the direction of hole expansion can be basically carried out in the direction of the small-diameter drilling before hole expansion.

The utility model discloses a roller-type hydrogeological well drilling and reaming drill bit, which comprises a roller drill bit and a directional rod 6. The directional rod is inserted into the hole before reaming to guide drilling, so as to prevent the drill bit from skewing during reaming. A sleeve ring 3 with an inclined angle relative to the axial direction is extended on the roller drill bit, and the roller 4 is fixedly installed in a direction perpendicular to the inner side surface of the sleeve ring 3, so that the drill bit can produce a compacting effect on the geological structure outside the installation groove 5 and the directional rod when reaming, thereby reducing the possibility of collapse of the hydrogeological well wall during construction. The rotation direction of the roller 4 has a certain inclined angle relative to the drilling direction, which can also reduce the wear of the end face of the roller 4 structure to a certain extent, thereby ensuring the reaming quality as a whole, improving the reaming efficiency, shortening the construction period and saving costs.

In another technical solution, as shown in FIG. 1 , the tail portion 9 of the directional rod 6 is configured as a plug structure.

During the last few drilling rounds of the hole expansion operation, the directional rod 6 may no longer be able to be inserted into the gravel layer for orientation due to clogging of the borehole. The directional rod 6 can be replaced with a directional rod 6 with an iron plug structure at the tail end. At this time, the purpose of continuing the hole expansion drilling can be achieved, thereby improving the applicability of the utility model's roller-type hydrogeological well drilling and hole expansion drill bit in hole expansion construction.

In another technical solution, as shown in FIGS. 1-2 , a thread 10 is provided in the notch of the installation slot 5 , and the head 7 of the directional rod 6 extends into the notch of the installation slot 5 and is connected via the thread 10 .

The connection between the directional rod 6 and the roller drill bit is set to be a threaded connection 10, which is convenient for the installation, disassembly and replacement of the directional rod 6 structure, and the directional rod 6 with different outer diameters and lengths can be selected according to the hole expansion requirements.

In another technical solution, as shown in Figures 1-2, the installation groove 5 is provided with a plurality of grooves 11 at intervals along the circumferential direction at the outer end on one side of the groove, and the end face of the head 7 of the directional rod 6 is provided with elastic clips 12 at intervals along the circumferential direction corresponding to the grooves 11, and the elastic clips 12 are used to be inserted into the grooves 11 for limiting.

The groove 11 is on the lower end surface of the mounting groove 5 as shown in Figure 2, and the elastic clip 12 is arranged on the upper end surface as shown in Figure 2. By setting a resettable matching structure of the groove 11 and the elastic clip 12, after the directional rod 6 is connected and screwed into the mounting groove 5 through the thread 10, the screw-in process is adjusted, and the elastic clip 12 of the head 7 of the directional rod 6 enters the groove 11 along the axial direction of the directional rod 6, and limits the directional rod 6 in the radial cross-section direction, thereby improving the connection stability between the directional rod 6 and the drill bit seat 1 during the hole expansion process.

In another technical solution, as shown in Figure 2, the tail portion 9 of the directional rod 6 includes a first rod segment 13 and a second rod segment 14 arranged in sequence along the axial direction, the first rod segment 13 is located between the waist 8 of the directional rod 6 and the second rod segment 14, and a spiral groove 15 is axially arranged on the first rod segment 13. The spiral groove 15 has an opposite rotation direction to the thread 10 in the mounting groove 5, and the first rod segment 13 is provided with convex teeth 16 on both sides of the extension path of the spiral groove 15.

By providing a spiral groove 15 on the first rod member and the extending rotation direction of the spiral groove 15 is opposite to the rotation direction of the thread 10 in the thread groove 10, during the hole expansion drilling process, the mud or geological layer mud can move along the spiral groove 15 to a certain extent after being subjected to pressure, thereby avoiding interference with the directional rod connected to the thread 10 and affecting the connection stability. At the same time, when the mud or geological layer mud contacts the directional rod, it collides with the convex teeth 16, which plays a role of auxiliary crushing and reduces the wear damage to the directional rod itself.

In another technical solution, as shown in FIG. 2 , cutting blades 17 are circumferentially spaced apart and connected between the end face of the waist 8 of the directional rod 6 facing the tail 9 and the first rod segment 13. By providing the cutting blades 17, the geological layer outside the tail end of the directional rod 6 is pre-cut and crushed, and the auxiliary gear 4 improves the crushing and hole expansion efficiency.

Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the drawings shown and described herein.

Claims (6)

1. A cone-type hydrogeological well drilling and hole enlarging drill bit, characterized in that it comprises: A roller drill bit, comprising a drill seat, the drill seat is in a truncated cone structure as a whole, a threaded joint is arranged on the outer wall of the smaller diameter end of the drill seat, a ring is arranged on the larger diameter end of the drill seat to extend outwardly obliquely, a plurality of rollers are arranged at intervals along the circumferential direction on the inner side of the ring, the axial direction of the rollers is perpendicular to the inner side of the ring and the outer end of the rollers is arranged beyond the edge of the ring, and a mounting groove is extended and connected in the middle of the drill seat along the axial direction toward between the plurality of rollers; A directional rod, which includes a head, a waist, and a tail arranged in sequence in the axial direction. The head is used to be connected and fixed to the mounting groove, and the tail is used to be inserted into the hole to be expanded. The diameter of the waist is larger than the inner diameter of the groove of the mounting groove, and the edge of the waist facing the tail does not exceed the outer end edge of the gear, and the outer diameter of the tail is smaller than the outer diameter of the waist. 2. The roller-type hydrogeological well drilling and reaming drill bit according to claim 1, characterized in that the tail portion of the directional rod is configured as a plug structure. 3. The roller-type hydrogeological well drilling and reaming drill bit according to claim 1, characterized in that a thread is arranged in the notch of the mounting groove, and the head of the directional rod extends into the notch of the mounting groove and is connected by threads. 4. The roller-type hydrogeological well drilling and expanding drill bit as described in claim 3 is characterized in that a plurality of grooves are arranged at intervals along the circumferential direction on the outer end of the mounting groove on one side of the groove, and elastic clips are arranged at intervals along the circumferential direction on the end face of the head of the directional rod corresponding to the grooves, and the elastic clips are used to be inserted into the grooves for limiting the position. 5. The roller-type hydrogeological well drilling and reaming drill bit as described in claim 3 is characterized in that the tail portion of the directional rod includes a first rod segment and a second rod segment arranged in sequence along the axial direction, the first rod segment is located between the waist portion of the directional rod and the second rod segment, a spiral groove is axially arranged on the first rod segment, the spiral groove is opposite to the thread direction in the mounting groove, and the first rod segment is provided with convex teeth on both sides of the extension path of the spiral groove. 6. The roller-type hydrogeological well drilling and reaming drill bit according to claim 5, characterized in that cutting blades are connected at intervals along the circumferential direction between the end surface of the waist of the directional rod facing the tail and the first rod segment.