CN213627440U

CN213627440U - Combined sealing drill bit for well drilling

Info

Publication number: CN213627440U
Application number: CN202022692149.4U
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: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-07-06
Anticipated expiration: 2030-11-19

Abstract

The utility model discloses a combined sealing drill bit for well drilling, which comprises a bit leg and a shaft. Has the advantages that: the utility model adopts the lower ring, the upper ring and the elastic ring, the bit leg and the shaft rotate relatively in the working process of the drill bit, in the rotating process, the outer wall of the elastic ring is abutted with the upper ring and the lower ring to provide certain thrust for the upper ring and the lower ring, so that the inner wall of the upper ring and the inner wall of the lower ring are firmly abutted with the inner wall of the sealing gasket ring arranged on the shaft, the generation of gaps is reduced, thereby improving the sealing performance, along with the increase of the service life, the inner wall of the upper ring and the inner wall of the lower ring are worn, thereby increasing the inner diameters of the upper ring and the lower ring, the elastic ring pushes the upper ring and the lower ring to tighten inwards, thereby make upper ring circle and lower ring circle butt seal backing ring again to solved the wearing and tearing and brought the problem in gap, reduced the easy problem that produces the leakage in gap department, thereby prolonged sealed life, and then prolonged life, improved sealing performance.

Description

Combined sealing drill bit for well drilling

Technical Field

The utility model relates to a well drilling drill bit technical field particularly, relates to a well drilling is with combination seal drill bit.

Background

During the hole digging operation, the drill bit rotates along with the vertical shaft and moves axially, soil is cut under the action of torque and axial force of the drill bit, is loosened under the action of extrusion of the working blades and centrifugal force to form soil flow which is pressed to a pit wall and is lifted to the ground along a page.

Traditional sealed drill bit adopts seal ring to seal, avoids appearing mud and enters into the occurence of failure in the drill bit, but traditional seal ring is out of shape easily, arouses the gap, and mud enters into easily, and along with live time's lapse, seal ring also produces wearing and tearing easily, causes the gap, can also further make the improvement, simultaneously, in sealed drill bit work engineering, inside lubricating oil can become invalid sometimes, increases wearing and tearing, influences life, also can further make the improvement.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a well drilling is with combination seal drill bit possesses the advantage that has improved sealing performance, has prolonged life, and then solves the problem among the above-mentioned background art.

(II) technical scheme

For realizing the above-mentioned advantage that has improved sealing performance, has prolonged life, the utility model discloses a concrete technical scheme as follows:

the utility model provides a well drilling is with combination seal drill bit, includes gripper jaw and axle, the gripper jaw has been cup jointed in the axle outside, and the gripper jaw inner wall has seted up the annular, the sealing backing ring has been seted up to the outer wall of axle, and the sealing backing ring corresponds the annular and sets up, annular and sealing backing ring are inside to be provided with the ring, and go up the ring below and be provided with down the ring, the spout has been seted up to lower ring top surface, go up the ring bottom surface and seted up the draw runner, and the draw runner peg graft in the spout and with spout sliding connection, the inside elasticity ring that is provided with of annular, and elasticity ring both ends and annular inner wall butt to elasticity ring outer wall and last ring and lower ring butt, go up the ring and be the arc structure with lower ring, and go up ring and lower ring staggered arrangement.

Further, the axle outer wall is located the sealing gasket ring top and has seted up the ball groove, the gripper inner wall is located the annular top and has seted up the draw-in groove corresponding to the ball groove position, and roll connection has the ball between draw-in groove and the ball groove, inlet and liquid outlet have been seted up to ball inslot wall, and inlet and liquid outlet are respectively through liquid passage and defeated oil pipe line through connection.

Furthermore, two liquid channels are formed in the liquid channel, and the liquid channels are located inside the shaft.

Furthermore, the upper part and the lower part of the ball groove are positioned on the outer wall of the shaft and are sleeved with sealing rings, and the outer wall of each sealing ring is in sliding butt joint with the inner wall of the tooth leg.

Further, the ring groove is internally filled with filler.

Furthermore, the cross sections of the sliding strip and the sliding groove are both in a convex shape, and the inner wall of the sliding groove is of a smooth structure.

(III) advantageous effects

Compared with the prior art, the utility model provides a well drilling is with combination seal drill bit possesses following beneficial effect:

(1) the utility model adopts the lower ring, the upper ring and the elastic ring, the bit leg and the shaft rotate relatively in the working process of the drill bit, in the rotating process, the outer wall of the elastic ring is abutted with the upper ring and the lower ring to provide certain thrust for the upper ring and the lower ring, so that the inner wall of the upper ring and the inner wall of the lower ring are firmly abutted with the inner wall of the sealing gasket ring arranged on the shaft, the generation of gaps is reduced, thereby improving the sealing performance, along with the increase of the service life, the inner wall of the upper ring and the inner wall of the lower ring are worn, thereby increasing the inner diameters of the upper ring and the lower ring, the elastic ring pushes the upper ring and the lower ring to tighten inwards, thereby make upper ring circle and lower ring circle butt seal backing ring again to solved the wearing and tearing and brought the problem in gap, reduced the easy problem that produces the leakage in gap department, thereby prolonged sealed life, and then prolonged life, improved sealing performance.

(2) The utility model discloses a ball groove, inlet and liquid outlet and the inside liquid channel through connection who offers of axle, at the in-process of work, lubricating oil gets into from liquid channel, flow out the ball groove from the inlet, lubricated ball and ball groove, friction reduction, the efficiency of rotation is improved, reducing wear, and service life is prolonged, and simultaneously, along with the continuous entering of lubricating oil, the hydraulic pressure of ball inslot portion increases, great oil pressure forces a part of lubricating oil to flow out through liquid channel outflow axle from the liquid outlet, accomplish the change of lubricating oil, the condition of the easy wearing and tearing of ball after traditional drill bit lubricating oil became invalid has been avoided, and then service life has further been improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and 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 these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a combined sealing drill for drilling according to the present invention;

fig. 2 is a schematic view of the connection between the upper ring and the lower ring of the present invention;

fig. 3 is a schematic view of the installation of the elastic ring of the present invention.

In the figure:

1. a bit leg; 2. a shaft; 3. a sealing gasket ring; 4. a liquid channel; 5. a liquid inlet; 6. a lower ring; 7. a slide bar; 8. a chute; 9. an elastic ring; 10. a filler; 11. an upper ring; 12. a ring groove; 13. a ball bearing; 14. a card slot; 15. a liquid outlet; 16. a ball groove.

Detailed Description

For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.

According to an embodiment of the utility model, a drilling is with combination seal drill bit is provided.

Referring now to the drawings and the detailed description, as shown in fig. 1-3, a composite sealing drill bit for drilling according to an embodiment of the present invention comprises a bit leg 1 and a shaft 2, wherein the bit leg 1 is sleeved outside the shaft 2, which is a common structure, an annular groove 12 is formed on the inner wall of the bit leg 1, a sealing pad ring 3 is formed on the outer wall of the shaft 2, the sealing pad ring 3 is formed corresponding to the annular groove 12, an upper ring 11 is arranged inside the annular groove 12 and the sealing pad ring 3, a lower ring 6 is arranged below the upper ring 11, a chute 8 is formed on the top surface of the lower ring 6, a slide bar 7 is formed on the bottom surface of the upper ring 11, the slide bar 7 slides along the chute 8, the slide bar 7 is inserted into the chute 8 and is slidably connected with the chute 8, an elastic ring 9 is arranged inside the annular groove 12, the elastic ring 9 is formed by bending a metal sheet, and two ends of the elastic ring 9 are abutted against the, and the outer wall of the elastic ring 9 is abutted with the upper ring 11 and the lower ring 6, the upper ring 11 and the lower ring 6 are both arc-shaped structures, and the upper ring 11 and the lower ring 6 are arranged in a staggered way and are convenient to retract inwards, so as to reduce the inner diameter, in the working process of the drill bit, the tooth palm 1 and the shaft 2 rotate relatively, in the rotating process, the outer wall of the elastic ring 9 is abutted with the upper ring 11 and the lower ring 6 to provide certain thrust for the upper ring 11 and the lower ring 6, so that the inner wall of the upper ring 11 and the inner wall of the lower ring 6 are firmly abutted with the inner wall of the sealing backing ring 3 arranged on the shaft 2, gaps are reduced, so that the sealing performance is improved, along with the increase of the using time, the inner wall of the upper ring 11 and the inner wall of the lower ring 6 are abraded, so that the inner diameters of the upper ring 11 and the lower ring 6 are increased, the elastic ring 9 pushes the upper ring 11 and the lower ring 6 to tighten inwards, so that the upper ring 11 and the lower ring, therefore, the problem of gaps caused by abrasion is solved, the problem that the gaps are easy to leak is reduced, the sealing service life is prolonged, the service life is prolonged, and the sealing performance is improved.

In one embodiment, the outer wall of the shaft 2 is provided with a ball groove 16 above the seal backing ring 3, the inner wall of the bit leg 1 is provided with a clamping groove 14 above the ring groove 12 corresponding to the position of the ball groove 16, and balls 13 are connected between the clamping groove 14 and the ball groove 16 in a rolling manner, which is a common structure, so that the shaft 2 is connected with the bit leg 1, the inner wall of the ball groove 16 is provided with a liquid inlet 5 and a liquid outlet 15, and the liquid inlet 5 and the liquid outlet 15 are respectively communicated with a liquid pipeline through a liquid channel 4, wherein the liquid channels 4 are provided with two liquid channels 4, and the liquid channels 4 are located inside the shaft 2, the liquid pipeline is a common structure, which is shown in detail in the figure, the liquid inlet 5 and the liquid outlet 15 are communicated with the liquid channel 4 provided inside the shaft 2, and during the operation, the lubricating oil enters from the liquid channel 4 and flows out from the liquid inlet 5, friction is reduced, rotation efficiency is improved, reducing wear improves life, simultaneously, along with the continuous entering of lubricating oil, the inside hydraulic pressure increase of ball groove 16, great oil pressure forces partly lubricating oil to flow out from liquid outlet 15 through liquid channel 4 outflow axle 2, accomplishes the change of lubricating oil, has avoided the easy condition of wearing and tearing of traditional drill bit lubricating oil back ball 13 that became invalid, and then has further improved life.

In one embodiment, the ball grooves 16 are sleeved with sealing rings above and below the outer wall of the shaft 2, and the outer walls of the sealing rings are in sliding contact with the inner wall of the bit leg 1 to prevent leakage of lubricating oil, which is a common sealing structure and not shown in detail.

In one embodiment, the ring groove 12 is filled with the filler 10 to further improve the sealing performance and reduce the gap.

In one embodiment, the cross sections of the sliding strip 7 and the sliding groove 8 are convex, so that the upper ring 11 and the lower ring 6 are prevented from falling off, and the inner wall of the sliding groove 8 is of a smooth structure.

The working principle is as follows:

in the working process of the drill bit, the bit leg 1 and the shaft 2 rotate relatively, in the rotating process, the outer wall of the elastic ring 9 abuts against the upper ring 11 and the lower ring 6, certain thrust is provided for the upper ring 11 and the lower ring 6, the inner wall of the upper ring 11 and the inner wall of the lower ring 6 are firmly abutted against the inner wall of the sealing pad ring 3 arranged on the shaft 2, the generation of gaps is reduced, and the sealing performance is improved, along with the increase of the using time, the inner wall of the upper ring 11 and the inner wall of the lower ring 6 are abraded, so that the inner diameters of the upper ring 11 and the lower ring 6 are increased, the elastic ring 9 at the moment pushes the upper ring 11 and the lower ring 6 to tighten inwards, so that the upper ring 11 and the lower ring 6 are abutted against the sealing pad ring 3 again, the problem of the gaps caused by abrasion is solved, the problem of easy leakage at the gaps is reduced, the sealing life is prolonged, the sealing performance is further prolonged, meanwhile, in the working process, lubricating oil enters from the liquid channel 4 and flows out of the liquid inlet 5 to the ball groove 16, the lubricating balls 13 and the ball groove 16 reduce friction, rotation efficiency is improved, abrasion is reduced, service life is prolonged, meanwhile, as the lubricating oil continuously enters, hydraulic pressure inside the ball groove 16 is increased, a part of the lubricating oil is forced to flow out of the liquid outlet 15 through the liquid channel 4 to flow out of the shaft 2 by large oil pressure, replacement of the lubricating oil is completed, the condition that the ball 13 is easily abraded after the lubricating oil of a traditional drill bit fails is avoided, and service life is further prolonged.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The combined sealing drill bit for well drilling is characterized by comprising a bit leg (1) and a shaft (2), wherein the bit leg (1) is sleeved on the outer side of the shaft (2), an annular groove (12) is formed in the inner wall of the bit leg (1), a sealing gasket ring (3) is formed in the outer wall of the shaft (2), the sealing gasket ring (3) is arranged corresponding to the annular groove (12), an upper annular ring (11) is arranged inside the annular groove (12) and the sealing gasket ring (3), a lower annular ring (6) is arranged below the upper annular ring (11), a sliding groove (8) is formed in the top surface of the lower annular ring (6), a sliding strip (7) is arranged on the bottom surface of the upper annular ring (11), the sliding strip (7) is inserted into the sliding groove (8) and is in sliding connection with the sliding groove (8), an elastic ring (9) is arranged inside the annular groove (12), two ends of the elastic ring (9) are abutted against the inner wall of the annular groove (12), and the outer wall of the elastic ring (9) is abutted against the, the upper ring (11) and the lower ring (6) are both arc-shaped structures, and the upper ring (11) and the lower ring (6) are arranged in a staggered manner.

2. The combined sealing drill bit for well drilling according to claim 1, characterized in that a ball groove (16) is formed in the outer wall of the shaft (2) above the sealing gasket ring (3), a clamping groove (14) is formed in the inner wall of the bit leg (1) above the ring groove (12) and corresponding to the ball groove (16), balls (13) are connected between the clamping groove (14) and the ball groove (16) in a rolling manner, a liquid inlet (5) and a liquid outlet (15) are formed in the inner wall of the ball groove (16), and the liquid inlet (5) and the liquid outlet (15) are respectively connected with a pipeline in a penetrating manner through a liquid channel (4).

3. A combined sealing drill bit for drilling well according to claim 2, characterized in that the liquid channel (4) opens out in two and the liquid channel (4) is located inside the shaft (2).

4. The composite sealing drill bit for well drilling according to claim 2, characterized in that sealing rings are sleeved on the outer wall of the shaft (2) above and below the ball groove (16), and the outer walls of the sealing rings are in sliding contact with the inner wall of the bit leg (1).

5. A composite sealing drill bit for drilling well according to claim 1, characterized in that the ring groove (12) is filled with filler (10) inside.

6. A combined sealing drill bit for well drilling according to claim 1, characterized in that the cross section of the sliding strip (7) and the sliding groove (8) is convex, and the inner wall of the sliding groove (8) is of smooth structure.