CN210264532U

CN210264532U - Casing drill bit

Info

Publication number: CN210264532U
Application number: CN201920554122.3U
Authority: CN
Inventors: 李文
Original assignee: Zhuzhou Jusheng Drilling Tools Co Ltd
Current assignee: Zhuzhou Jusheng Drilling Tools Co Ltd
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2020-04-07
Anticipated expiration: 2029-04-23

Abstract

The utility model discloses a casing bit. Including drill bit main part and brill tooth, its characterized in that the drill bit main part is a whole fashioned cavity circular cylinder, and this drill bit main part one end is the drill bit, and the other end is the connecting handle, the ring top surface evenly distributed of drill bit has a plurality of chip grooves, is provided with plane perforation, interior slope perforation, camber perforation respectively between two chip grooves, the drill bit is big-end-up's shrink type drill bit, and the ring top surface and the connecting handle junction of this drill bit are the 5 angular adduction of slope, plane perforation, interior slope perforation, camber perforation all install the brill tooth. The utility model discloses can realize well drilling and go on in step with the lower casing, can prevent that the wall of a well from collapsing, the work efficiency who improves again.

Description

Casing drill bit

Technical Field

The utility model relates to a drill bit, concretely relates to casing bit.

Background

When the existing building is used for foundation construction, concrete needs to be poured into the foundation, inclined concrete support columns are arranged on four sides of the main foundation in order to strengthen the structure of the foundation, different types of drill bits are selected according to different requirements, but the connecting handle of the existing down-the-hole drill bit is generally smaller than the drill bit, the soil is easy to collapse or the drilled hole is irregular in soft places, the regular hole is difficult to drill by only using a down-the-hole drill, in order to realize the purpose of drilling standard round holes on soft soil, a casing drill bit is matched with the prior down-the-hole drill bit for use, the casing drill bit is connected with a hollow casing, the casing drill bit is internally provided with a down-the-hole drill bit for synchronous operation, the casing is put in while drilling, the down-the-hole drill bit is withdrawn after the drilling is finished, then the concrete is injected into the casing to directly cast the concrete support pillar in situ, the casing drill bit is retracted before the concrete is not cured, so that the purpose of manufacturing a standard concrete support column is achieved.

Disclosure of Invention

The utility model aims at overcoming the not enough of prior art, provide a casing bit of well cementation punches on soft soil.

In order to achieve the above object, the technical solution of the present invention is: the utility model provides a casing bit, includes drill bit main part and bores the tooth, its characterized in that the drill bit main part is a whole fashioned cavity circular cylinder, and this drill bit main part one end is the drill bit, and the other end is the connection handle, the ring top surface evenly distributed of drill bit has a plurality of chip grooves, is provided with plane perforation, interior slope perforation, the extroversion face perforation respectively between two chip grooves, the drill bit is big-end-up's shrink type drill bit, and the ring top surface of this drill bit is 5 jiaos of slopes internal contraction with the connection handle junction, plane perforation, interior slope perforation, extroversion face perforation all install and bore the tooth, and this brill tooth is carbide button tooth.

The chip groove is a U-shaped groove, and V-shaped grooves are formed in two ends of the chip groove along the axial direction of the drill bit.

The connecting handle is an external thread connecting handle.

The cavity of the drill bit body penetrates through the drill bit and the connecting handle.

The inclination angle of the inward-inclined plane tooth hole is 25 degrees, and the inclination angle of the outward-inclined plane tooth hole is 35 degrees.

The number of the chip grooves is four, the number of the plane tooth holes is four, the number of the inward inclined plane tooth holes is four, and the number of the outward inclined plane tooth holes is eight.

The beneficial effects of the utility model are that, the utility model discloses annular at the drill bit main part creeps into the top surface and evenly is provided with four chip grooves, these four chip grooves of arranging fall into four units with the ring, every unit all is equipped with 1 plane tooth, 1 is 25 face teeth and 2 face teeth that are the leanin and are 35 face teeth that lean out, in-process that creeps into through a front, the triangle-shaped mode is personally submitted forward to both sides, drilling speed and stability have been improved, and the screw thread end and the hollow sleeve hookup of drill bit, well drilling and lower casing are gone on in step, can prevent that the wall of a well from collapsing, the work efficiency who improves again.

Drawings

Fig. 1 is a schematic top view of the present invention;

fig. 2 is a schematic front view of the present invention;

fig. 3 is a view from fig. 1A.

Fig. 4 is a schematic cross-sectional view of fig. 1C-C.

Fig. 5 is a schematic cross-sectional view of fig. 4B-B.

Fig. 6 is a schematic cross-sectional view of fig. 1D-D.

Fig. 7 is a schematic cross-sectional view of fig. 1E-E.

Fig. 8 is a schematic cross-sectional view of fig. 6F-F.

Fig. 9 is an enlarged schematic view of a portion K of fig. 2.

In the figure: the drill bit comprises a drill bit body, 2 drill teeth, 3 plane tooth holes, 4 inward inclined face tooth holes, 5 outward inclined face tooth holes, 6 chip grooves, 7 cavities, 11 drill bits and 12 connecting handles.

Detailed Description

The present invention and its embodiments will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1-9, the utility model discloses a drill bit main part 1 and brill tooth 2, its characterized in that drill bit main part 1 is a whole fashioned cavity circular cylinder, and 1 one end of this drill bit main part is drill bit 11, and the other end is connecting handle 12, the ring top surface evenly distributed of drill bit 11 has a plurality of chip grooves 6, is provided with plane perforation 3, interior inclined plane perforation 4, extroversion face perforation 5 respectively between two chip grooves 6, drill bit 11 is big-end-up's shrink type drill bit, and the ring top surface of this drill bit is 5 angular adduction of slope with connecting handle 12 junction, plane perforation 3, interior inclined plane perforation 4, extroversion face perforation 5 all install brill tooth 2.

The chip groove 6 is a U-shaped groove, and both ends of the chip groove are provided with V-shaped grooves along the axial direction of the drill bit 11.

The stem 12 is an externally threaded stem.

The cavity 7 of the bit body 1 extends through the bit 11 and the shank 12.

The inclination angle of the inward-inclined plane tooth hole 4 is 25 degrees, and the inclination angle of the outward-inclined plane tooth hole is 35 degrees.

The number of the chip grooves 6 is four, the number of the plane tooth holes 3 is four, the number of the inward inclined plane tooth holes 4 is four, and the number of the outward inclined plane tooth holes 5 is eight.

The utility model discloses a casing bit installs and uses with the down-the-hole drill bit is supporting at the hollow sleeve front end of top drive formula anchor machine, will creep into and merge into an operation process with the lower casing, reduce the emergence of drilling accidents such as the wall of a well collapses, especially in the operation on the soft stratum that easily collapses, the effect is showing, drilling and lower casing are synchronous to be carried out and to eliminate the lower casing card and hinder the scheduling problem, and casing bit and sleeve pipe can reuse, do not receive the influence of aperture size, the even drilling of shape all can be beaten out, be favorable to improving the drilling quality.

Claims

1. The utility model provides a casing bit, includes drill bit main part (1) and bores tooth (2), its characterized in that drill bit main part (1) is a whole fashioned cavity circular cylinder, and this drill bit main part (1) one end is drill bit (11), and the other end is connecting handle (12), the ring top surface evenly distributed of drill bit (11) has a plurality of chip grooves (6), is provided with plane perforation (3), interior inclined surface perforation (4), camber perforation (5) respectively between two chip grooves (6), drill bit (11) are big-end-up's little shrinkage type drill bit, and the ring top surface of this drill bit is slope 5 angular adduction with connecting handle (12) junction, plane perforation (3), interior inclined surface perforation (4), camber perforation (5) all install and bore tooth (2).

2. A casing bit according to claim 1, characterized in that the junk slots (6) are U-shaped slots and that the junk slots are provided with V-shaped slots at both ends in the axial direction of the bit (11).

3. A casing bit according to claim 2, characterized in that said shank (12) is an externally threaded shank.

4. A casing bit according to claim 3, characterized in that the cavity (7) of the bit body (1) extends through the bit (11) and the shank (12).

5. A casing bit according to any one of claims 1 to 4, characterised in that the angle of inclination of the inwardly-inclined face perforations (4) is 25 ° and the angle of inclination of the outwardly-inclined face perforations (5) is 35 °.

6. A casing bit according to any one of claims 1 to 4, characterised in that the number of flutes (6) is four, the number of flat perforations (3) is four, the number of inwardly inclined perforations (4) is four and the number of outwardly inclined perforations (5) is eight.