CN215804383U

CN215804383U - Drill bit for drilling by cutting and rolling

Info

Publication number: CN215804383U
Application number: CN202122033726.3U
Authority: CN
Inventors: 魏超科
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2022-02-11
Anticipated expiration: 2031-08-27

Abstract

The utility model relates to a drill bit for cutting and rolling drilling, which relates to the technical field of drill bits.A outer ring wall at one end of an outer cylinder of a PDC drill bit is integrally formed with an external connecting thread, and an inner ring wall is integrally formed with an internal connecting thread; a plurality of sand discharge and drainage grooves are formed in the outer end face of the other end of the outer cylinder of the PDC drill bit at equal angles, and a cutting tool bit is fixedly embedded in one side wall of each sand discharge and drainage groove; a shaft is arranged in the outer cylinder of the PDC drill bit, and two ends of the shaft penetrate through and are welded and fixed in the cylinder wall of the outer cylinder of the PDC drill bit; a convex ring is convexly and integrally formed in the middle of the shaft; the number of the rollers is two, and the bearings are symmetrically sleeved on the parts, positioned on the left side and the right side of the convex ring, of the shaft; and a plurality of roller teeth are fixedly embedded on the outer wall of the roller. The diamond PDC cutting drilling is matched with the roller rolling drilling, so that the defects of large drilling resistance, low speed of cutting special stratum and the like are avoided.

Description

Drill bit for drilling by cutting and rolling

Technical Field

The utility model relates to the technical field of drill bits, in particular to a drill bit for drilling by cutting and rolling drilling.

Background

When the single diamond PDC is used for cutting and drilling, the drilling is slow when the hard layer is encountered, but the existing petroleum cone has high production cost, short service life and low working efficiency and high labor intensity when the drill bit is repeatedly replaced.

Disclosure of Invention

The utility model aims to overcome the defects and shortcomings of the prior art and provide a drill bit for drilling by cutting and rolling drilling.

In order to achieve the purpose, the utility model adopts the following technical scheme: the PDC drill bit comprises a PDC drill bit outer cylinder, a roller and a shaft; the outer ring wall of one end of the outer cylinder of the PDC drill bit is integrally formed with an outer connecting thread, and the inner ring wall is integrally formed with an inner connecting thread;

a plurality of sand discharge and drainage grooves are formed in the outer end face of the other end of the outer cylinder of the PDC drill bit at equal angles, a cutting tool bit is fixedly embedded in one side wall of each sand discharge and drainage groove, and the cutting tool bit can be made of diamond or a diamond composite sheet PDC;

a shaft is arranged in the outer cylinder of the PDC drill bit, and two ends of the shaft penetrate through and are welded and fixed in the cylinder wall of the outer cylinder of the PDC drill bit;

a convex ring is convexly and integrally formed in the middle of the shaft;

the number of the rollers is two, the bearings are symmetrically sleeved on the left side and the right side of the convex ring on the shaft, and the rollers can be made of diamond composite sheets PDC or alloys;

the outer wall of the roller is fixedly embedded with a plurality of roller teeth which can be made of hard alloy or diamond composite sheets PDC.

Preferably, the outside of bearing all is equipped with the oil blanket, and the oil blanket all overlaps and establish epaxially, all is equipped with sealed lid with the outside of two oil blankets that PDC drill bit urceolus inside wall is adjacent.

Preferably, a shaft sleeve is arranged between the shaft and the roller, and the shaft sleeve is sleeved on the shaft.

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a drill bit for drilling by cutting and rolling, which adopts diamond PDC cutting drilling matched with roller rolling drilling to avoid the defects of large drilling resistance, slow speed of cutting special stratum and the like.

Description of the drawings:

fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a schematic structural diagram of the embodiment.

Description of reference numerals:

the PDC drill bit comprises an outer cylinder 1 of a PDC drill bit, an outer connecting thread 1-1, an inner connecting thread 1-2, a sand-discharging and water-discharging groove 1-3, a roller 2, a shaft 3, a convex ring 3-1, a bearing 4, a cutting tool bit 5, a roller tooth 6, an oil seal 7, a shaft sleeve 8 and a sealing sleeve 9.

The specific implementation mode is as follows:

the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, and the preferred embodiments in the description are only examples, and all other embodiments obtained by those skilled in the art without any inventive work belong to the protection scope of the present invention.

As shown in fig. 1 and fig. 2, the following technical solutions are adopted in the present embodiment: the PDC bit comprises a PDC bit outer cylinder 1, a roller 2 and a shaft 3; the outer cylinder 1 of the PDC drill bit is made of diamond or a diamond compact; the outer annular wall of one end of the outer cylinder 1 of the PDC drill bit is integrally formed with an external connecting thread 1-1 which is directly connected with the pilot tube, and the inner annular wall is integrally formed with an internal connecting thread 1-2 which is connected with a drill collar or a drill rod for direct drilling;

a plurality of sand discharge and drainage grooves 1-3 are formed in the outer end face of the other end of the outer cylinder 1 of the PDC drill bit at equal angles, a cutting tool bit 5 is fixedly embedded in one side wall of each sand discharge and drainage groove 1-3, and the cutting tool bit 5 is a PDC cutting tool bit;

a shaft 3 is arranged in the PDC drill bit outer cylinder 1, and two ends of the shaft 3 penetrate through and are welded and fixed in the cylinder wall of the PDC drill bit outer cylinder 1;

a convex ring 3-1 is convexly and integrally formed in the middle of the shaft 3, so that contact abrasion and position deviation between the two rollers 2 are avoided;

the number of the rollers 2 is two, the rollers are alloy rollers, the bearings 4 are symmetrically sleeved on the left side and the right side of the convex ring 3-1 on the shaft 3, and the outer edges of the rollers 2 are exposed at the outer end of the outer cylinder 1 of the PDC drill bit;

a plurality of roller teeth 6 are fixedly embedded on the outer wall of the roller 2, and the roller teeth 6 are hard alloy roller teeth.

Preferably, the outside of bearing 4 all is equipped with oil blanket 7, and oil blanket 7 all overlaps and establish on axle 3, and the outside of two oil blankets 7 adjacent with 1 inside wall of PDC drill bit urceolus all is equipped with sealed lid 9, and sealed lid 9 overlaps and establish on axle 3, and oil blanket 7 is the oil blanket of sealing up the silt, protects bearing 4's life.

Preferably, a shaft sleeve 8 is arranged between the shaft 3 and the roller 2, and the shaft sleeve 8 is sleeved on the shaft 3.

The working principle of the specific embodiment is as follows: because the roller 2 is exposed out of the outer end of the PDC drill bit outer cylinder 1, the roller 2 rolls and advances into a ruler firstly during drilling, and then the PDC drill bit outer cylinder 1 drills into the ruler under the repairing action of the cutting bit 5.

After adopting above-mentioned structure, this embodiment's beneficial effect is as follows: the utility model provides a drill bit for drilling a well by cutting and rolling, wherein a cutting tool bit is adopted for cutting and drilling on an outer circle, two rollers with hard alloy or cutting tool bits are assembled on an inner circle for rolling and drilling, and the defects of large drilling resistance and slow cutting speed of special stratum caused by the fact that an independent diamond PDC and an independent roller are used for drilling are avoided.

Example (b):

referring to fig. 3, the outer edge of the roller 2 in this embodiment is disposed inside the outer cylinder 1 of the PDC drill bit, and when drilling, the PDC drills through the outer cylinder 1, and after repairing and drilling are performed by the cutting head 5, the roller 2 rolls rock.

It will be appreciated by those skilled in the art that modifications and equivalents may be made to the embodiments described above, and that various modifications, equivalents, improvements and the like may be made without departing from the spirit and scope of the utility model.

Claims

1. A drill bit for cutting and rolling drilling well drilling is characterized in that: the PDC bit comprises a PDC bit outer cylinder (1), a roller (2) and a shaft (3); an outer ring wall at one end of the PDC drill bit outer cylinder (1) is integrally formed with an outer connecting thread (1-1), and an inner ring wall is integrally formed with an inner connecting thread (1-2);

a plurality of sand discharge and drainage grooves (1-3) are formed in the outer end face of the other end of the PDC drill bit outer cylinder (1) at equal angles, and a cutting tool bit (5) is fixedly embedded in one side wall of each sand discharge and drainage groove (1-3);

a shaft (3) is arranged in the PDC drill bit outer cylinder (1), and two ends of the shaft (3) penetrate through and are welded and fixed in the cylinder wall of the PDC drill bit outer cylinder (1);

a convex ring (3-1) is convexly and integrally formed in the middle of the shaft (3);

the number of the rollers (2) is two, and the bearings (4) are symmetrically sleeved on the left side and the right side of the shaft (3) at the left side and the right side of the convex ring (3-1);

a plurality of roller teeth (6) are fixedly embedded on the outer wall of the roller (2).

2. The drill bit for cutting and roll drilling a borehole of claim 1, wherein: the outside of bearing (4) all is equipped with oil blanket (7), and oil blanket (7) all overlap and establish on axle (3), all is equipped with sealed lid (9) with the outside of two oil blankets (7) that PDC drill bit urceolus (1) inside wall is adjacent.

3. The drill bit for cutting and roll drilling a borehole of claim 1, wherein: a shaft sleeve (8) is arranged between the shaft (3) and the roller (2), and the shaft sleeve (8) is sleeved on the shaft (3).