CN212406590U - Combined type hole expanding drilling tool - Google Patents

Abstract

The utility model provides a modular reaming drilling tool, include the drilling rod of the lower extreme area reamer bit that links to each other with the rig, and the guide body that links to each other with the drilling rod, its characterized in that drilling rod lower extreme spiro union has the top connection, the upper portion of this top connection is equipped with flourishing water cavity, the middle part is equipped with the shaft hole with flourishing water cavity intercommunication, be equipped with the hydrophobic passageway with flourishing water cavity intercommunication all around, flourishing water cavity passes through drilling rod and delivery pipe intercommunication, the lower extreme spiro union of top connection has the reamer bit of establishing the chamber of catchmenting in it, hydrophobic passageway lower extreme and the chamber intercommunication of catchmenting, the guide body upper end is passed and is connected the nut spiro union that the shaft hole upwards extends to in the flourishing water cavity and take lock washer, the lower. Only need to change down the drill bit, reduce cost carries out high-efficient cooling to the drill bit, prolongs its life, can polish to little drilling hole wall to the sediment, the bits that will polish the production are got rid of, are ensured reaming quality.

Description

Combined type hole expanding drilling tool

Technical Field

The utility model relates to a reaming drilling tool, especially a modular reaming drilling tool belongs to open-air geological exploration rock core probing technical field.

Background

In the middle-deep hole drilling construction, due to the complexity and the changeability of the geological structure, the drilling structure needs to be continuously adjusted, in the long hole section reaming construction, whether the smooth footage of the reaming bit can be ensured is always a difficult problem of reaming operation, particularly, the central axis of the drilling tool needs to be always coincident with the central line of the small-diameter drilling hole, the technical key of adjusting the drilling structure and smoothly drilling is provided, and the reaming bit is required to have good and reliable guiding performance. In the prior art, a lengthened large-diameter drilling tool or a double-layer advanced guide drilling tool is mostly used, but the drilling tool is too long and cannot be cooled normally, so that accidents such as drill burning, drill sticking and the like are caused, and the success rate is extremely low. Also there is drilling tool manufacturer direct and drill bit sintering together the direction, though improved, nevertheless because be as an organic whole reaming diamond bit and the direct sintering of direction, in case the drill bit is scrapped, whole reaming drilling tool also follows to scrap, causes the waste, and the economic nature is extremely poor, and in addition, the guide part does not have reasonable row's sediment structure, and the sediment of boring very easily clamps the guide body, causes accidents such as reaming failure, and the drilling security is low. Therefore, there is a complete need for improvements in the prior art.

Disclosure of Invention

An object of the utility model is to provide a can guarantee that new and old drilling axis coincides completely, cooling effect is good, long service life, reaming is efficient, safe and reliable's combination formula reaming drilling tool.

The utility model provides a combined type hole expanding drilling tool, which comprises a drill rod connected with a drilling machine and provided with a hole expanding drill bit at the lower end, and a guide body connected with the drill rod, and is characterized in that the lower end of the drill rod is screwed with an upper joint, the upper part of the upper joint is provided with a water containing cavity, the middle part of the upper joint is provided with a shaft hole communicated with the water containing cavity, the periphery of the upper joint is provided with a water drainage channel communicated with the water containing cavity, the water containing cavity is communicated with a water supply pipe through the drill rod, the lower end of the upper joint is screwed with a hole expanding drill bit internally provided with a water collecting cavity, the lower end of the water drainage channel is communicated with the water collecting cavity, the upper end of the guide body passes through the shaft hole of the upper joint and extends upwards into the water containing cavity to be screwed with a nut with a check washer, the lower end extends downwards to the lower part of the hole expanding drill rod, so that, the water flows out along the circumferential surface between the drill bit and the guide body, so that the drill bit is efficiently cooled, the service life of the drill bit is greatly prolonged, and the drill bit can be replaced according to actual wear conditions, and the rest of the drill bit can be continuously used, so that the cost is greatly reduced, and the waste is avoided.

The upper part of the guide body is provided with an upper cylindrical section matched with the shaft hole of the upper joint, the middle part of the guide body is provided with a middle conical column section which is matched with the water collecting cavity of the drill bit and is small at the upper part and large at the lower part, the lower part of the guide body is provided with a lower cylindrical section of which the outer diameter is larger than the outer diameter of the bottom of the conical column, axial diamond strips are arranged on the surface of the lower cylindrical section at intervals, and an axial groove is arranged between every two axial diamond strips, so that in the process of downward propelling and guiding, the wall of a small drill hole is polished by the axial diamond strips arranged on the surface of the lower cylindrical section at intervals, and meanwhile, slag and scraps generated by polishing are.

And a horizontal screw hole is formed in the wall of the upper joint, and a bolt is arranged in the horizontal screw hole so as to radially fix the guide rod through the bolt.

The water supply pipe is connected with the water tank through a water pump.

The utility model has the advantages of it is following and effect: by adopting the scheme, not only can according to the actual wearing and tearing condition, only need to change the drill bit down, all the other all can continue to use, greatly reduce cost, avoid extravagant, simultaneously at the drilling rod, the top connection, the drill bit is when the drilling machine drives and rotates and accomplish the drilling and enlarge, supply water to flourishing water cavity through the delivery pipe, rethread drainage channel, the chamber of catchmenting, make water flow out on the periphery between drill bit and the guide body, thereby carry out high-efficient cooling to the drill bit, the life of drill bit has been prolonged greatly, in the in-process of impelling downwards and direction, when the axial diamond strip that sets up through lower cylinder section surface interval ground the little drill hole wall, the sediment that will polish through axial recess, bits are got rid of, make the pore wall complete, bright and clean, ensure reaming quality.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The utility model provides a combination formula reaming drilling tool, include the drilling rod 1 of the lower extreme area reamer bit 7 that links to each other with rig 13 to and the guide body 6 that links to each other with drilling rod 1, wherein: the lower end of the drill rod 1 is in threaded connection with an upper joint 17, the upper part of the upper joint 17 is provided with a water containing cavity 2, the middle part of the upper joint is provided with a shaft hole 4 communicated with the water containing cavity 2, the periphery of the upper joint is provided with a drainage channel 12 communicated with the water containing cavity 2, the water containing cavity 2 is communicated with a water supply pipe 14 through the drill rod 1, the lower end of the upper joint 17 is in threaded connection with a hole expanding drill bit 7 in which a water collecting cavity 8 is arranged, the lower end of the drainage channel 12 is communicated with the water collecting cavity 8, the upper end of a guide body 6 penetrates through the shaft hole 4 of the upper joint 17 and extends upwards into the water containing cavity 2 to be; the upper part of the guide body 6 is provided with an upper cylindrical section matched with the shaft hole 4 of the upper joint 17, the middle part of the guide body is provided with a middle conical column section matched with the water collecting cavity 8 of the drill bit 7 and the upper part of the guide body is provided with a middle conical column section with a small upper part and a large lower part, the outer diameter of the lower part of the guide body is larger than that of the bottom of the conical column, axial diamond strips 10 are arranged on the surface of the lower cylindrical section at intervals, and an axial groove 11 is formed between every two axial diamond strips 10, so that in the process of downward propelling and guiding, the slag and scraps generated by polishing are removed through the axial groove 11 while the wall of a small drill hole b is polished through the axial diamond strips 10 arranged on the surface of the lower cylindrical section; the wall of the upper joint 17 is provided with a horizontal screw hole 5, and a bolt is arranged in the horizontal screw hole 5 so as to radially fix the guide body 6 through the bolt; the water supply pipe 14 is connected to a sump 16 by a water pump 15.

When in work: the guide body 6 and the drill rod 1 are conveyed into a drill hole, the lower cylindrical section at the lower part of the guide body 6 is arranged in a small drill hole b, the drill 13 is started to work, the drill rod 1, the upper joint 17 and the drill bit 7 are driven by the drill 13 to rotate, the small drill hole b is expanded into a large drill hole a, water is supplied to the water containing cavity 2 through the water supply pipe 14, the water enters the water collecting cavity 8 through the water drainage channel 12 and flows out along the circumferential surface between the diamond drill bit matrix 9 and the guide body 6, so that the drill bit 7 is efficiently cooled, the service life of the drill bit 7 is greatly prolonged, the drill bit 7 only needs to be replaced according to the actual wear condition, other parts such as the upper joint 17 can be continuously used, the cost is greatly reduced, the waste is avoided, and in the process of downward propelling and guiding, the wall surface of the small drill hole b is polished through the axial diamond strips 10 arranged at intervals on the surface of the lower cylindrical section, When the hole is cleaned, the slag and scraps generated by polishing are removed through the axial groove 11, so that the hole wall is complete and smooth, and the hole expansion quality is ensured.

Claims (4)

1. The combined type hole expanding drilling tool comprises a drill rod and a guide body, wherein the drill rod is connected with a drilling machine and is provided with a hole expanding drill bit at the lower end, the guide body is connected with the drill rod, the lower end of the drill rod is in threaded connection with an upper joint, the upper portion of the upper joint is provided with a water containing cavity, the middle portion of the upper joint is provided with a shaft hole communicated with the water containing cavity, the periphery of the upper joint is provided with a water drainage channel communicated with the water containing cavity, the water containing cavity is communicated with a water supply pipe through the drill rod, the lower end of the upper joint is in threaded connection with the hole expanding drill bit, the water drainage channel is communicated with the water collecting cavity, the upper end of the guide body penetrates through the shaft hole of the upper joint and.

2. The combined type hole expanding drilling tool as claimed in claim 1, wherein the upper portion of the guide body is provided with an upper cylindrical section matched with the upper joint shaft hole, the middle portion of the guide body is provided with a middle conical column section which is smaller at the upper part and larger at the lower part and matched with the water collecting cavity of the drill bit, the lower portion of the guide body is provided with a lower cylindrical section which is larger than the outer diameter of the bottom of the conical column, axial diamond strips are arranged on the surface of the lower cylindrical section at intervals, and an axial groove is arranged between every two axial diamond strips.

3. The combined type hole expanding drill tool as claimed in claim 1, wherein the upper joint wall is provided with horizontal screw holes, and bolts are arranged in the horizontal screw holes.

4. The modular reamer tool of claim 1, wherein the water supply line is connected to the basin by a water pump.

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