CN211598530U

CN211598530U - Erosion-resistant PDC drill bit body

Info

Publication number: CN211598530U
Application number: CN202020151153.7U
Authority: CN
Inventors: 韩志彪; 檀大冰; 李瑞亮
Original assignee: Tianjin Hanjie Technology Co ltd
Current assignee: Tianjin Hanjie Technology Co ltd
Priority date: 2020-02-03
Filing date: 2020-02-03
Publication date: 2020-09-29
Anticipated expiration: 2030-02-03

Abstract

The utility model provides an anti PDC drill bit body that erodees belongs to the PDC drill bit field. The erosion resistant PDC bit body includes a borehole earth assembly and an impact assembly. The soil drilling component comprises a cylinder and a blade, the blade is fixed at one end of the cylinder, a cutter is fixed on the surface of the blade and comprises a bulge and a cutting tooth, the cutting tooth is fixed at one end of the bulge through a fastener, one end of a sliding rod is fixedly connected with the impact head, the sliding rod is connected with the cylinder in a sliding manner, and an elastic part is connected between the sliding rod and the cylinder; the cutter fixed on the blade is connected and fixed through the fastener, so that the cutting teeth can be conveniently replaced and repaired for many times. The impact head one end is connected with the cylinder through the elastic piece, has the effect of impact damage to the stratum when meetting hard stratum to the impact action when having slowed down cutter and hard stratum contact simultaneously, makes the drill bit slow down the erosion when using for a long time, with the life of extension drill bit.

Description

Erosion-resistant PDC drill bit body

Technical Field

The utility model relates to a PDC drill bit field particularly, relates to anti erosion's PDC drill bit body.

Background

At present, when a steel PDC drill bit is used for a long time or the sand content of bottom mud is heavy, tooth cavities near a nozzle are easy to erode. Mainly, the impact force on the erosion part is large, but the protection capability of the part is relatively insufficient. The problem of early failure of the drill bit due to erosion of the drill bit pockets often occurs.

SUMMERY OF THE UTILITY MODEL

In order to compensate the above insufficiency, the utility model provides an anti-erosion PDC drill bit body aims at improving the easy wearing and tearing of PDC drill bit, the short problem of life.

The utility model discloses a realize like this:

the embodiment of the utility model provides an anti PDC drill bit body that erodees, including boring native subassembly and impact assembly.

The earth drilling component comprises a cylinder and blades, wherein the blades are fixed at one end of the cylinder, cutters are fixed on the surfaces of the blades and comprise protrusions and cutting teeth, the cutting teeth are fixed at one end of each protrusion through fasteners, chip removal grooves are formed between every two adjacent blades, and nozzles are formed in the end portions of the cylinder.

The impact assembly comprises an impact head and a sliding rod, the impact head is arranged at the top of the column body, one end of the sliding rod is fixedly connected with the impact head, the sliding rod is connected with the column body in a sliding mode, and an elastic piece is connected between the sliding rod and the column body.

In an embodiment of the present invention, the blade is provided with a plurality of blades, and the blades are distributed in an annular array.

In an embodiment of the present invention, the blade upper surface is coated with a wear-resistant layer, and the bottom of the blade is provided with a heat-conducting layer.

The utility model discloses an in the embodiment, the tooth's socket has been seted up on the blade surface, the arch is fixed in the tooth's socket, protruding cylindrical setting.

The utility model discloses an in one embodiment, protruding one end set up threaded hole, the counter bore has been seted up on the cutting tooth surface, the fastener is pegged graft in the counter bore, the one end of fastener with screw hole threaded connection.

In an embodiment of the present invention, the clamping portion is fixed to one end of the cylinder, and the surface of the clamping portion has a clamping groove.

In an embodiment of the present invention, the clamping portion is a tapered column, and one end of the tapered column and the column end are integrally formed.

In an embodiment of the present invention, a sliding groove is formed at the top of the cylinder, the elastic member is fixed at the bottom of the sliding groove, one end of the sliding rod is slidably inserted into the sliding groove, and one end of the sliding rod is fixedly connected to the elastic member.

The utility model discloses an in an embodiment, the spacing groove has been seted up to the cylinder end, sliding connection has the stopper in the spacing groove, the stopper is fixed the slide bar surface.

In an embodiment of the present invention, the sliding groove is provided at the bottom of the limiting groove, and the cushion pad is fixed in the limiting groove.

The utility model has the advantages that: the utility model discloses an erosion-resistant PDC drill bit body that above-mentioned design obtained, during the use, the cutter on the rotatory drive wing of cylinder breaks ground, after the broken rock of cutting tooth, the detritus volume that produces between the wing is more, dredge the discharge through setting up the chip groove, reduce the possibility of being detained in wing department, thereby avoided the detritus to pile up the degree of depth that the restriction drill bit cutter absorbed the stratum, reduce the resistance under the brill soil of drill bit, reduce wearing and tearing, the cutter of fixing passes through the fastener connection on the wing and fixes, be convenient for change the cutting tooth, therefore, the service life extension, but many times restoration. The impact head one end is connected with the cylinder through the elastic piece, has the effect of impact damage to the stratum when meetting hard stratum to the impact action when having slowed down cutter and hard stratum contact simultaneously, makes the drill bit slow down the erosion when using for a long time, with the life of extension drill bit.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram provided in an embodiment of the present invention;

fig. 2 is a schematic view of a split structure provided in an embodiment of the present invention;

fig. 3 is a schematic view of a cutter structure according to an embodiment of the present invention;

fig. 4 is a schematic view of a cutting structure of a blade according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a position a in fig. 2 according to an embodiment of the present invention.

In the figure: 100-a soil drilling assembly; 110-a column; 120-a blade; 121-a wear resistant layer; 122-a thermally conductive layer; 130-a cutter; 131-protrusions; 132-a cutting tooth; 133-a fastener; 140-chip space; 150-a nozzle; 160-a clamping portion; 161-clamping groove; 300-an impact assembly; 310-impact head; 320-a sliding bar; 330-an elastic member; 340-a chute; 350-a limiting groove; 360-a limiting block; 370-cushion.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the utility model provides a. Embodiments, all other embodiments obtained by a person skilled in the art without any inventive step are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1-5, the present invention provides a technical solution: an erosion resistant PDC bit body includes an earth-boring assembly 100 and a percussive assembly 300.

Wherein, the impact assembly 300 is fixed at the end of the earth drilling assembly 100, and the impact assembly 300 is firstly contacted with the hard rock stratum, thereby slowing down the erosion effect of the hard rock stratum to the earth drilling assembly 100.

Referring to fig. 2-4, the earth drilling assembly 100 includes a cylinder 110 and blades 120, the blades 120 are fixed at one end of the cylinder 110, the surface of the blades 120 is fixed with a cutter 130, the cutter 130 includes a protrusion 131 and a cutting tooth 132, the cutting tooth 132 is fixed at one end of the protrusion 131 through a fastener 133, a chip groove 140 is formed between two adjacent blades 120, a nozzle 150 is formed at the end of the cylinder 110, the blades 120 are provided with a plurality of blades 120, the blades 120 are distributed in an annular array, five blades 120 are provided, the upper surface of the blade 120 is coated with a wear-resistant layer 121, the bottom of the blade 120 is provided with a heat-conducting layer 122, the wear-resistant layer 121 is a nickel-based tungsten carbide layer with a welded surface, so as to improve the wear-resistant degree of the blades 120, the heat dissipation of the blades 120 is facilitated by the heat-conducting layer 122, the surface of the blade 120 is provided with a tooth groove, the surface of the cutting tooth 132 is provided with a counter bore, the fastener 133 is inserted in the counter bore, one end of the fastener 133 is in threaded connection with the threaded hole, the cutting tooth 132 is convenient to replace, one end of the cylinder 110 is fixed with the clamping part 160, the surface of the clamping part 160 is provided with the clamping groove 161, the clamping part 160 is a conical column, the conical column is made of stainless steel, the corrosion resistance is high, one end of the conical column and the end part of the cylinder 110 are integrally formed, the integral mechanical strength is improved, and the installation and the use are convenient by additionally arranging the clamping groove 161.

Referring to fig. 1 and 5, the impact assembly 300 includes an impact head 310 and a sliding rod 320, the impact head 310 is disposed on the top of the cylinder 110, the impact head 310 is formed by stamping a conical titanium alloy, one end of the sliding rod 320 is fixedly connected to the impact head 310, the sliding rod 320 is slidably connected to the cylinder 110, an elastic member 330 is connected between the sliding rod 320 and the cylinder 110, a sliding slot 340 is formed on the top of the cylinder 110, the elastic member 330 is fixed to the bottom of the sliding slot 340, a housing of the elastic member 330 is a spring, one end of the sliding rod 320 is slidably inserted into the sliding slot 340, one end of the sliding rod 320 is fixedly connected to the elastic member 330, a limiting slot 350 is formed in an end of the cylinder 110, a limiting block 360 is slidably connected to the limiting slot 350, the limiting block 360 is fixed to an outer surface.

The working principle of the erosion-resistant PDC drill bit body is as follows: during the use, cylinder 110 is rotatory to drive cutter 130 on wing 120 and is broken earth, after cutting tooth 132 breaks the rock, the detritus volume that produces between the wing 120 is more, dredge through setting up chip groove 140 and discharge, reduce the possibility of detaining in wing 120 department, thereby avoided the detritus to pile up the degree of depth that limits drill cutter 130 to eat the stratum, reduce the resistance under the drilling soil of drill bit, reduce wearing and tearing, cutter 130 fixed on wing 120 passes through fastener 133 and connects fixedly, be convenient for change cutting tooth 132, therefore life extension, but multiple repair. The impact head 310 is connected to the cylinder 110 through the elastic member 330 at one end, and has an impact damage effect on the hard rock formation when encountering the hard rock formation, and simultaneously reduces the impact effect when the cutter 130 contacts the hard rock formation, so that the drill bit reduces erosion during long-term use, thereby prolonging the service life of the drill bit.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The erosion-resistant PDC drill bit body is characterized by comprising

The earth drilling component (100) comprises a column body (110) and blades (120), the blades (120) are fixed at one end of the column body (110), a cutter (130) is fixed on the surface of each blade (120), each cutter (130) comprises a protrusion (131) and a cutting tooth (132), each cutting tooth (132) is fixed at one end of each protrusion (131) through a fastener (133), a chip discharge groove (140) is formed between every two adjacent blades (120), and a nozzle (150) is formed in the end part of the column body (110);

impact assembly (300), impact assembly (300) is including strikeing head (310) and slide bar (320), it sets up to strike head (310) cylinder (110) top, the one end of slide bar (320) with strike head (310) fixed connection, slide bar (320) with cylinder (110) sliding connection, slide bar (320) with be connected with elastic component (330) between cylinder (110).

2. The erosion resistant PDC bit body of claim 1, wherein the plurality of blades (120) are arranged, the blades (120) being distributed in an annular array.

3. The erosion resistant PDC bit body of claim 1, wherein the blades (120) are coated on their upper surfaces with a wear resistant layer (121), the bottom of the blades (120) being provided with a thermally conductive layer (122).

4. The erosion resistant PDC bit body of claim 1, wherein the blades (120) have gullets formed in a surface thereof, the projections (131) being secured within the gullets, the projections (131) being cylindrically disposed.

5. The erosion resistant PDC bit body of claim 4 wherein the boss (131) has a threaded bore at one end, the cutting tooth (132) has a counterbore at a surface thereof, the fastener (133) is inserted in the counterbore, and the fastener (133) has one end threadedly coupled to the threaded bore.

6. The erosion resistant PDC bit body of claim 1 wherein the post (110) has a gripping portion (160) secured to one end thereof, the gripping portion (160) having a gripping groove (161) formed in a surface thereof.

7. The erosion resistant PDC bit body of claim 6 wherein the gripping portion (160) is a tapered post having one end integrally formed with the end of the cylindrical body (110).

8. The erosion-resistant PDC drill bit body as claimed in claim 1, wherein a sliding groove (340) is formed in the top of the cylinder (110), the elastic member (330) is fixed to the bottom of the sliding groove (340), one end of the sliding rod (320) is slidably inserted into the sliding groove (340), and one end of the sliding rod (320) is fixedly connected with the elastic member (330).

9. The erosion-resistant PDC drill bit body as claimed in claim 8, wherein a limiting groove (350) is formed at an end of the cylinder (110), a limiting block (360) is slidably connected in the limiting groove (350), and the limiting block (360) is fixed on the outer surface of the sliding rod (320).

10. The erosion resistant PDC bit body of claim 9, wherein the sliding slot (340) opens at the bottom of the retaining groove (350), the retaining groove (350) having a cushion pad (370) secured therein.