CN215632793U

CN215632793U - PDC composite sheet drill bit

Info

Publication number: CN215632793U
Application number: CN202122147135.9U
Authority: CN
Inventors: 张占奎; 曹江龙
Original assignee: Cangzhou Great Drill Co ltd
Current assignee: Cangzhou Great Drill Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-01-25
Anticipated expiration: 2031-09-07

Abstract

The utility model discloses a PDC composite sheet drill bit which comprises a drill bit body, blades, a water hole and a fastener, wherein the blades are arranged on the drill bit body; the plurality of blades are fixed on the drill bit body and are circumferentially distributed on the drill bit body; the water hole is fixed on the drill bit body in a threaded mode, the fastener is fixed between the water hole and the drill bit body, and the fastener is used for fixing the water hole. The PDC composite sheet drill bit provided by the utility model has a simple structure, is convenient for further fixing a water hole, and avoids the water hole from falling off.

Description

PDC composite sheet drill bit

Technical Field

The utility model relates to the technical field of drilling related equipment, in particular to a PDC (polycrystalline diamond compact) composite bit.

Background

PDC (polycrystalline diamond) is a cutting element formed by welding artificial diamond and a tungsten carbide base together at high temperature and high pressure, the design technology and the machining process of a PDC drill bit taking the artificial diamond as a main cutting element are continuously improved since the advent, and the numerical control machining program from the design of the drill bit to the base is completely completed by a computer by foreign companies. The domestic drill bit manufacturing technology is still in the starting stage basically, is made by workshop-type manual manufacturing and cannot meet the requirements of modern production. With the development of the domestic PDC industry, advanced design, manufacturing technology and a perfect quality assurance system are key factors which win the market competition.

The water hole has on the current PDC drill bit body, and water hole and water injection chamber intercommunication, drilling liquid are discharged from the water hole via the water injection chamber, and then on the one hand to the drill bit cooling, the drilling of being convenient for in addition, and the water hole on the current drill bit is through the thread tightening on the drill bit body to loosen through thread gluing and handle, but the use of thread gluing makes the water hole drop easily because the washing away of long-time liquid.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems in the background technology, the utility model provides a PDC composite sheet drill bit.

The utility model provides a PDC (polycrystalline diamond compact) composite sheet drill bit which comprises a drill bit body, blades, a water hole and a fastener, wherein the blades are arranged on the drill bit body;

the plurality of blades are fixed on the drill bit body and are circumferentially distributed on the drill bit body;

the water hole is fixed on the drill bit body in a threaded mode, the fastener is fixed between the water hole and the drill bit body, and the fastener is used for fixing the water hole.

The fastening piece can be a fastening screw in the prior art, the fastening screw can be arranged on the drill bit body in a threaded mode, and the inner end of the fastening screw is abutted against the water hole, so that the effect of further fixing the water hole is achieved;

the fastener can also adopt a fixing pin, both the water hole and the drill bit body are provided with fixing holes along the radial direction of the water hole, and when the fixing holes on the water hole are opposite to the fixing holes on the drill bit body, the fixing pins are inserted to further fix the water hole.

As a further optimized scheme of the utility model, the fastening piece is a snap spring, so that the fastening piece is convenient to mount and dismount, and other processing holes do not need to be formed in the drill bit body.

As a further optimized scheme of the utility model, the upper surface of the water hole is provided with a plurality of bulges, and a clamping groove is formed between any two adjacent bulges, so that the water hole is convenient to mount and dismount.

As a further optimized scheme of the utility model, at least one end of the open end of the clamp spring is positioned on the clamp groove, so that the force of the clamp spring on the open end of the clamp spring is reduced, and the fixing effect of the clamp spring on the clamp spring is improved.

As a further optimized scheme of the utility model, the drill bit body is provided with a connecting hole, a clamping space is formed between the upper surface of the water hole and the upper surface of the connecting hole, and the clamp spring is positioned in the clamping space, so that the clamp spring is convenient to mount and dismount.

As a further optimized scheme of the utility model, the inner wall of the connecting hole is provided with the annular groove, the outer side of the clamp spring is positioned in the annular groove, the stability of the connection of the clamp spring and the drill bit body is further improved, and the stability of the clamp spring for fixing a water hole is further improved.

As a further optimized scheme of the utility model, the water holes comprise first water holes, a heat dissipation space is formed between any two adjacent blades, and the first water holes are positioned in the heat dissipation space, so that the cooling effect on the blades is increased, and the drilling is facilitated.

As a further optimized scheme of the utility model, the water hole also comprises a second water hole, the second water hole is arranged on the end surface of the drill bit body, and the second water hole is opposite to the end part of the blade, so that the cooling effect of the blade is increased, and the drilling is facilitated.

The PDC composite sheet drill bit provided by the utility model has a simple structure, is convenient for further fixing a water hole, and avoids the water hole from falling off.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of area A of the present invention;

fig. 3 is a side view of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. 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 expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either mechanically or electrically connected or communicable with each other; 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.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

A PDC composite bit as shown in fig. 1-3, comprising a bit body 1, blades 2, pockets 3, and fasteners;

the blade 2 is fixed on the drill bit body 1 in a welding mode, the plurality of blades 2 are arranged, and the plurality of blades 2 are uniformly and circumferentially distributed on the drill bit body 1;

the water hole 3 is fixed on the drill bit body 1 in a threaded mode, the fastening piece is fixed between the water hole 3 and the drill bit body 1, and the fastening piece is used for fixing the water hole 3;

specifically, a connecting hole 10 is formed in the drill bit body 1, the connecting hole 10 is a threaded hole, and threads on the outer portion of the water hole 3 are matched with the threaded hole;

in the embodiment, the fastening piece is preferably a clamp spring 4, so that the fastening piece is convenient to mount and dismount;

a clamping space is formed between the upper surface of the water hole 3 and the upper surface of the connecting hole 10, namely the water hole 3 sinks into the connecting hole 10, and the clamp spring 4 is positioned in the clamping space, so that the clamp spring 4 is convenient to mount and dismount;

in order to further increase the fixing stability of the snap spring 4 to the water hole 3, in this embodiment, it is preferable that the inner wall of the connecting hole 10 is provided with a ring groove 11, the outer side of the snap spring 4 is located in the ring groove 11, and the inner side portion of the snap spring 4 is pressed on the water hole 3, so as to further fix the water hole 3;

in order to facilitate the detachment and installation of the water eye 3, in this embodiment, preferably, the upper surface of the water eye 3 is provided with a plurality of protrusions 30, a clamping groove 31 is formed between any two adjacent protrusions 30, and the water eye 3 can be mounted and detached by being clamped in the clamping groove 31 by a tool and then rotating the water eye 3;

in this embodiment, preferably, in the process of installing the snap spring 4, at least one end of the opening end of the snap spring 4 is located on the snap groove 31, so that the force of the water hole 3 on the opening end of the snap spring 4 is reduced, and the fixing effect of the snap spring 4 on the water hole 3 is increased.

In this embodiment, preferably, the water hole 3 includes a first water hole 300, a heat dissipation space is formed between any two adjacent blades 2, the first water hole 300 is located in the heat dissipation space, and water sprayed from the first water hole 300 cools the blades 2 on both sides, so as to increase the cooling effect on the blades 2, thereby facilitating drilling.

In this embodiment, preferably, the water hole 3 further includes a second water hole 301, the second water hole 301 is installed on the end surface of the drill body 1, and the second water hole 301 is opposite to the end of the blade 2, so as to further cool the blade 2 and the drill body 1, increase the cooling effect on the blade 2, and facilitate drilling.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A PDC (polycrystalline Diamond compact) bit is characterized by comprising a bit body, blades, a water hole and a fastener;

2. The PDC composite bit of claim 1, wherein the fastener is a circlip.

3. The PDC compact bit of claim 2, wherein the top surface of the port has a plurality of projections, and a snap-fit groove is formed between any two adjacent projections.

4. The PDC compact bit of claim 3, wherein at least one end of the open end of the circlip is positioned in the snap groove.

5. The PDC compact bit of claim 2 wherein the bit body defines a coupling hole therein, a retaining space is defined between an upper surface of the port and an upper surface of the coupling hole, and the retaining spring is disposed in the retaining space.

6. The PDC bit of claim 5 wherein the inner wall of the connecting hole is grooved, and the outside of the circlip is located in the groove.

7. The PDC compact bit of any one of claims 1-6, wherein the pockets include a first pocket, and a heat dissipation space is formed between any adjacent two blades, the first pocket being located in the heat dissipation space.

8. The PDC composite bit of claim 7, wherein the port further comprises a second port mounted on an end face of the bit body, the second port being opposite the end of the blade.