CN215332684U - Spherical-tooth double-sleeve hard alloy forward-circulation drill bit under pebble geological condition - Google Patents

Abstract

The utility model discloses a spherical-tooth double-sleeve hard alloy forward circulation drill bit under a pebble geological condition, which comprises a main drill rod, wherein an inner sleeve is arranged at the bottom of the main drill rod, an alloy ball body is arranged at the bottom of the inner sleeve, a drill bit drainage cover is arranged at the middle position of the surface of the main drill rod, an outer sleeve is arranged at the position, close to the bottom, of the surface of the main drill rod, a connecting rod is arranged at the position among the main drill rod, the drill bit drainage cover and the outer sleeve, a sediment lifting piece is connected between the top of the drill bit drainage cover and the main drill rod, and reinforced spherical-tooth drill teeth and spherical-tooth drill teeth are arranged at the bottom of the outer sleeve; the utility model has simple structure and easy manufacture, can improve the drilling efficiency, the pore-forming quality and the drilling adaptability of the positive-circulation drilling machine under the high-strength round-grain complex geological condition, can effectively reduce the abrasion of the drill bit and saves the cost.

Description

Spherical-tooth double-sleeve hard alloy forward-circulation drill bit under pebble geological condition

Technical Field

The utility model relates to a spherical-tooth double-sleeve hard alloy forward circulation drill bit under a pebble geological condition.

Background

In the process of pile foundation construction of building engineering, bridge engineering and the like, a boulder stratum, a gravel stratum and a pebble stratum exist in some areas, and the stratum generally consists of sandstone, basalt, tuff and the like. When the positive circulation drilling machine is used for drilling construction of the stratum, due to the fact that a large amount of large-particle-size round gravels and pebbles exist, when the existing drill bit in the existing market is used for constructing the stratum, the efficiency is low, the drill bit is seriously abraded, and the phenomena of drill sticking and hole collapse are easy to occur, so that the hole forming quality and speed of the cast-in-situ bored pile are not guaranteed.

In view of the above, it would be desirable to provide a button double sleeve cemented carbide positive circulation drill bit under pebble geological conditions that solves the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a spherical-tooth double-sleeve hard alloy forward circulation drill bit under the pebble geological condition.

The utility model is realized by the following technical scheme:

the utility model provides a button double sleeve carbide drill bit that just circulates under cobble geological conditions, includes the main drill rod, the position department of main drill rod bottom is provided with the inner skleeve, the position department of inner skleeve bottom surface is provided with the alloy spheroid, the alloy spheroid is provided with four, the position department that main drill rod surface is located the centre is provided with drill bit drainage cover, the position department that the main drill rod surface is close to the bottom is provided with the outer sleeve, the main drill rod the drill bit drainage cover with position department between the outer sleeve is provided with the connecting rod, drill bit drainage cover top with be connected with the sediment between the main drill rod and promote the piece, the position department of outer sleeve bottom is provided with the enhancement button and drills tooth and button and drills the tooth, strengthen the button and bore the tooth with the button drills the tooth and all is provided with four.

Preferably, a wrench clamping groove is formed in the position, close to the top, of the surface of the main drill rod, and a tapered male thread is arranged at the position, located at the top of the wrench clamping groove, of the surface of the main drill rod.

Preferably, a fixed blade is arranged on the surface of the connecting rod, and a straight drill tooth is arranged on the surface of the fixed blade.

Preferably, a drill tooth reinforcing strip is arranged at the position of the surface of the reinforced spherical tooth drill tooth.

Preferably, a hard alloy hole wall grinding strip is arranged at the position of the outer surface of the drill bit flow guide cover.

Preferably, the sediment lifting piece and the main drill rod form an included angle of 70 degrees in the vertical direction, and a rotation angle of 15 degrees in the horizontal direction.

The utility model has the beneficial effects that:

1. according to the utility model, the spherical tooth drilling teeth and the reinforced spherical tooth drilling teeth are embedded in the outer sleeve at intervals, so that pebbles and round gravels with larger diameters can be firmly sleeved in the drilling process, and the phenomena of drill slipping and drill jumping in the drilling process are avoided;

2. according to the utility model, the inner sleeve is embedded with the button drill teeth at intervals, and can be matched with the outer sleeve to further cut and grind the hooped large-diameter pebbles;

3. the inner sleeve is directly connected with the main drill rod, slurry is transferred to the inner sleeve through the main drill rod and then is flushed out of the inner sleeve, gravel fragments ground by the inner sleeve and the outer sleeve can be flushed away, and meanwhile, a drill bit can be assisted to flush fine-particle gravel soil such as slurry, clay and the like in a stratum, so that the drilling speed is accelerated;

4. according to the utility model, the sediment lifting piece rotates at a high speed along with the main drill rod, and under the action of the centrifugal force of the sediment lifting piece rotating at a high speed, the upward returning speed of the mud at the bottom of the hole carrying the drilling slag is accelerated, so that the defect of poor drilling slag removing capability of a positive circulation drilling machine is greatly overcome;

5. according to the reinforced spherical-tooth drilling tooth, the alloy reinforcing strips of the drilling tooth are welded on the side edges of the spherical-tooth drilling tooth, so that the phenomenon that a common spherical-tooth drilling tooth abrades a low-strength steel carrier on the side edges in the drilling process is effectively avoided, the alloy spherical tooth is prevented from falling off, and the service life of a positive circulation drill bit is prolonged.

The utility model has simple structure and easy manufacture, can improve the drilling efficiency, the pore-forming quality and the drilling adaptability of the positive-circulation drilling machine under the high-strength round-grain complex geological condition, can effectively reduce the abrasion of the drill bit and saves the cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a bottom view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a schematic view of an end of the kelly.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "sleeved," "connected," "penetrating," "plugged," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, 2 and 3, the button double-sleeve cemented carbide circulating drill bit under the pebble geological condition comprises a main drill rod, an inner sleeve is arranged at the position of the bottom of the main drill rod, an alloy sphere is arranged at the position of the bottom surface of the inner sleeve, four alloy spheres are arranged, a drill bit drainage cover is arranged at the position, located in the middle, of the surface of the main drill rod, an outer sleeve is arranged at the position, close to the bottom, of the surface of the main drill rod, a connecting rod is arranged at the position between the main drill rod, the drill bit drainage cover top and the main drill rod, a sediment lifting piece is connected between the drill bit drainage cover top and the main drill rod, reinforced button drill teeth and button drill teeth are arranged at the position of the bottom of the outer sleeve, and four reinforced button drill teeth and button drill teeth are arranged.

In a preferred embodiment of the present invention, a wrench slot is disposed on a surface of the main drill rod near the top, and a tapered male thread is disposed on a surface of the main drill rod at a top of the wrench slot.

In a preferred embodiment of the present invention, a fixed blade is disposed on a surface of the connecting rod, and a straight drill tooth is disposed on a surface of the fixed blade.

In a preferred embodiment of the present invention, a drill tooth reinforcing strip is disposed at the position of the surface of the reinforced button drill tooth.

According to a preferred embodiment of the utility model, the outer surface of the drill flow guide cover is provided with a hard alloy hole wall grinding strip.

In a preferred embodiment of the present invention, the sediment lift piece forms an angle of 70 ° with the vertical direction of the main drill rod, and forms a rotation angle of 15 ° with the horizontal direction.

The device is connected with a positive circulation drilling machine through a tapered male thread on a main drilling rod, and drilling operation construction is carried out.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims (6)

1. A spherical-tooth double-sleeve hard alloy forward circulation drill bit under pebble geological conditions is characterized in that: comprises a main drill rod (1), an inner sleeve (7) is arranged at the bottom of the main drill rod (1), alloy spheres (11) are arranged at the bottom of the inner sleeve (7), four alloy spheres (11) are arranged, a drill bit drainage cover (3) is arranged at the middle position of the surface of the main drill rod (1), an outer sleeve (8) is arranged on the surface of the main drill rod (1) near the bottom, a connecting rod is arranged at the position among the main drill rod (1), the drill bit drainage cover (3) and the outer sleeve (8), a sediment lifting piece (2) is connected between the top of the drill bit drainage cover (3) and the main drill rod (1), the bottom of the outer sleeve (8) is provided with reinforced spherical tooth drilling teeth (10) and spherical tooth drilling teeth (9), the four reinforcing spherical tooth drilling teeth (10) and the four spherical tooth drilling teeth (9) are arranged.

2. A button double sleeve cemented carbide positive circulation drill bit under pebble geological conditions, according to claim 1, characterized in that: a wrench clamping groove (13) is formed in the position, close to the top, of the surface of the main drill rod (1), and a conical male thread (14) is arranged at the position, located at the top of the wrench clamping groove (13), of the surface of the main drill rod (1).

3. A button double sleeve cemented carbide positive circulation drill bit under pebble geological conditions, according to claim 1, characterized in that: the cutter is characterized in that a fixed blade (5) is arranged at the surface of the connecting rod, and a straight drill tooth (6) is arranged at the surface of the fixed blade (5).

4. A button double sleeve cemented carbide positive circulation drill bit under pebble geological conditions, according to claim 1, characterized in that: and a drilling tooth reinforcing strip (12) is arranged at the surface of the reinforcing spherical tooth drilling tooth (10).

5. A button double sleeve cemented carbide positive circulation drill bit under pebble geological conditions, according to claim 1, characterized in that: and a hard alloy hole wall grinding strip (4) is arranged at the position of the outer surface of the drill bit drainage cover (3).

6. A button double sleeve cemented carbide positive circulation drill bit under pebble geological conditions, according to claim 1, characterized in that: the sediment lifting piece (2) and the main drill rod (1) form an included angle of 70 degrees in the vertical direction, and a rotation angle of 15 degrees is formed in the horizontal direction.

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