CN214659966U

CN214659966U - Anti-sticking drill bit for quick drilling

Info

Publication number: CN214659966U
Application number: CN202021017646.8U
Authority: CN
Inventors: 孙永刚; 周东
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-11-09
Anticipated expiration: 2030-06-05

Abstract

The utility model relates to an anti-sticking drill bit for fast drilling, which comprises a drill rod and a drill bit which are connected, wherein the drill bit is provided with a plurality of flushing holes, and the drill rod is provided with a central hole connected with the flushing holes along the axis; the end of the drill rod is provided with an inner cavity, and the inner cavity is provided with a piston block; the inner side wall of the inner cavity is communicated with the central hole through an opened liquid inlet hole, and the outer side wall of the inner cavity is communicated with a drilling well through a plurality of horizontal holes; the outer side surface of the piston block is provided with a plurality of well expanding rods, the well expanding rods are located in the horizontal hole, and a spring for resetting is arranged between the piston block and the side wall of the inner cavity. The utility model discloses the beneficial effect who reaches is: the drill bit is difficult for blocking by the falling rock debris, large space is formed, the drill bit can be rapidly continued to be drilled, the working efficiency is not influenced, and the drill is convenient to stop and clean impurities.

Description

Anti-sticking drill bit for quick drilling

Technical Field

The utility model relates to a drilling technical field, especially an anti-sticking drill bit for quick lower drilling.

Background

When drilling in an oil field, generally, after drilling for a certain distance, the drill pipe stays for a certain time and then continues to drill downwards; however, when the drill bit stays at a certain position, the rock debris falling from the well wall can be accumulated at the drill bit, so that the drill bit is blocked from rotating, the drilling cannot be continued, the error correction adjustment has to be carried out, and the working efficiency is seriously influenced.

According to the experience of drilling, the applicant designs an anti-blocking drill bit for quick drilling, a large space is formed at the drill bit, falling rock debris cannot be blocked, and the rock debris cannot form too large blocking force on the drill bit.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide a formation big space, the difficult anti-sticking drill bit that is used for quick lower drilling of the dead drill bit of card of detritus that drops.

The purpose of the utility model is realized through the following technical scheme: an anti-sticking drill bit for fast drilling comprises a drill rod and a drill bit which are connected, wherein the drill bit is provided with a plurality of flushing holes, and the drill rod is provided with a central hole connected with the flushing holes along the axis;

the end of the drill rod is provided with an inner cavity, and the inner cavity is provided with a piston block;

the inner side wall of the inner cavity is communicated with the central hole through an opened liquid inlet hole, and the outer side wall of the inner cavity is communicated with a drilling well through a plurality of horizontal holes;

the outer side surface of the piston block is provided with a plurality of well expanding rods, the well expanding rods are located in the horizontal hole, and a spring for resetting is arranged between the piston block and the side wall of the inner cavity.

Further, when the well-expanding rod is completely extended out, the circle formed by the outer end of the well-expanding rod is larger than the diameter of the drill bit;

after the well expansion rod retracts, the outer end of the well expansion rod is positioned in the horizontal hole.

Further, the spring is provided in two ways: in the first mode, a spring is arranged between the inner side surface of the piston block and the inner side wall of the inner cavity; in a second mode, a spring is arranged between the outer side surface of the piston block and the outer side wall of the inner cavity.

Furthermore, the end of the drill rod is provided with an upper connector and a lower connector which are installed in a threaded fit mode, and an upper cavity of the inner cavity is plugged through the end face of the upper connector.

Preferably, a plurality of inner cavities are circumferentially arranged on the drill rod.

Preferably, the inner cavity is a cavity with a large upper part and a small lower part, so that sundries can be cleaned conveniently.

Preferably, the piston block is installed with the upper and lower walls of the inner cavity in a matching way through the sliding groove.

The utility model has the advantages of it is following:

(1) by arranging the liquid inlet hole, the piston block well expansion rod and the spring, when the drill bit stays at a certain position and does not continue to drill downwards, drilling fluid flowing out of the central hole through the flushing hole is blocked to form larger hydraulic pressure, so that the hydraulic pressure pushes the piston block and pushes the well expansion rod out, the well expansion rod expands a well at the drill bit along the circumferential direction, rock debris falling on a well wall is initially blocked by the well expansion rod, and the falling rock debris is pressed into an expanded cavity when the well expansion rod rotates along with the drill bit, so that the rock debris is prevented from being accumulated at the drill bit, and the drill bit is prevented from being stuck; when the drilling needs to be continued downwards, the drilling can be immediately carried out due to no jamming of the drill, and compared with the traditional jamming of the drill, the scheme does not influence the drilling production and has high production efficiency;

(2) the upper connector and the lower connector form an arrangement of a closed inner cavity, after working for a period of time, impurities are inevitably accumulated in the inner cavity, the lower connector is unscrewed and is poured out, and the device is simple and convenient;

(3) a plurality of inner cavities are circumferentially arranged at the end of the drill rod instead of one inner cavity, so that the strength of the drill rod is prevented from being influenced.

Drawings

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

FIG. 2 is a top view of the structure in which the upper connector and the lower connector are fitted;

in the figure: 1-drill rod, 101-upper connector, 102-lower connector, 103-central hole, 2-drill bit, 201-flushing hole, 3-liquid inlet hole, 4-inner cavity, 5-piston block, 501-well-expanding rod, 502-cross rod and 6-spring.

Detailed Description

The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.

As shown in fig. 1 and 2, the anti-sticking drill bit for quick drilling comprises a drill rod 1 and a drill bit 2 which are connected, wherein the drill bit 2 is provided with a plurality of flushing holes 201, and the drill rod 1 is provided with a central hole 103 connected with the flushing holes 201 along the axial center.

In the scheme, an inner cavity 4 is arranged at the end head of the drill rod 1, and the inner side wall of the inner cavity 4 is communicated with a central hole 103 through an arranged liquid inlet hole 3; the outer side wall of the inner chamber 4 communicates with the drilling well through a plurality of horizontal holes.

A piston block 5 is further arranged in the inner cavity 4, a plurality of well expanding rods 501 are arranged on the outer side face of the piston block 5, the well expanding rods 501 are located in the horizontal hole, and a spring 6 for resetting is arranged between the piston block 5 and the side wall of the inner cavity 4. When the well-expanding rod 501 is fully extended, the circle formed by the outer end of the well-expanding rod is larger than the diameter of the drill bit; when the well-expanding rod 501 is retracted, its outer end is located in the horizontal hole.

In this scheme, being provided with two kinds of modes of spring: in the first mode, a spring 5 is arranged between the inner side surface of the piston block 5 and the inner side wall of the inner cavity 4; in the second mode, a spring 6 is arranged between the outer side surface of the piston block 5 and the outer side wall of the inner cavity 4, and the spring 6 is sleeved on the well expansion rod 501.

The spring 6 of the present embodiment is preferably arranged in a first manner, as shown in fig. 2. A transverse column 502 is fixed on the inner side surface of the piston block 5, and the transverse column 502 corresponds to the liquid inlet hole 3; the spring 6 is sleeved on the cross rod 502. In this way, the diameter of the cross-post 502 is smaller than the diameter of the liquid inlet hole 3, and when the spring 6 is reset and the cross-bar 502 is inserted into the liquid inlet hole 3, the liquid in the inner chamber 4 can return to the central hole 103 through the gap between the liquid inlet hole 3 and the cross-bar 502.

When the drilling tool works, when the drill bit 2 stays at a certain position and does not continue to drill downwards, drilling fluid flowing out of the central hole 103 through the flushing hole 201 is blocked, and large hydraulic pressure is formed, so that the piston block 5 is pushed by the hydraulic pressure, the well expansion rod 501 is pushed out, the well at the drill bit 2 is expanded along the circumferential direction by the well expansion rod 501, rock debris falling on a well wall is initially blocked by the well expansion rod 501, and the falling rock debris is pressed into an expanded cavity when the well expansion rod 501 rotates along with the well expansion rod, so that the rock debris is prevented from being accumulated at the drill bit, and the drill bit is prevented from being stuck; when needs continue to move down drilling, because do not have the sticking of tool, can erect immediately and bore, compare in traditional sticking of tool condition, this scheme does not influence well drilling production, and production efficiency is high.

When drilling, as the drill bit 2 moves all the time to form a new drilling section, the drilling liquid flowing out from the central hole 103 through the flushing hole 201 is consumed all the time, so that too large hydraulic pressure cannot be formed at the liquid inlet hole 3, and the hydraulic pressure can only be used for cleaning the drill bit 2 to prevent a mud bag from being formed; thus the reamer 201 is retracted.

In order to clean impurities conveniently, an upper connector 101 and a lower connector 102 which are installed in a threaded fit mode are arranged at the end of the drill rod 1, and an upper opening of the inner cavity 4 is sealed through the end face of the upper connector 101; and the inner cavity 4 is a big-end-up cavity. After working for a period of time, impurities are inevitably accumulated in the inner cavity, and when sundries need to be cleaned, the connector is unscrewed and removed, and the connector is simply and conveniently poured.

Instead of providing one large cavity 4, a plurality of cavities 4 are provided in the circumferential direction at the end of the drill rod 1, mainly to avoid affecting the strength of the drill rod 1.

In this embodiment, the piston block 5 is mounted to the upper and lower walls of the inner chamber 4 through sliding grooves.

Claims

1. The utility model provides an anti-sticking drill bit for quick brill down, is including drilling rod (1) and drill bit (2) that link to each other the setting, and drill bit (2) have a plurality of flushing holes (201), and drilling rod (1) is opened along the axle center has centre bore (103) that link to each other with flushing hole (201), its characterized in that:

the end of the drill rod (1) is provided with an inner cavity (4), and the inner cavity (4) is provided with a piston block (5);

the inner side wall of the inner cavity (4) is communicated with the central hole (103) through the opened liquid inlet hole (3), and the outer side wall of the inner cavity is communicated with a drilling well through a plurality of horizontal holes;

the outer side face of the piston block (5) is provided with a plurality of well expanding rods (501), the well expanding rods (501) are located in the horizontal hole, and a spring (6) for resetting is arranged between the piston block (5) and the side wall of the inner cavity (4).

2. An anti-seize drill bit for rapid tripping according to claim 1, wherein: when the well expansion rod (501) is completely extended out, the diameter of a circle formed at the outer end of the well expansion rod is larger than that of the drill bit;

after the well expansion rod (501) retracts, the outer end of the well expansion rod is positioned in the horizontal hole.

3. An anti-seize drill bit for rapid tripping according to claim 2, wherein: and a spring (5) is arranged between the inner side surface of the piston block (5) and the inner side wall of the inner cavity (4).

4. An anti-seize drill bit for rapid tripping according to claim 2, wherein: and a spring (6) is arranged between the outer side surface of the piston block (5) and the outer side wall of the inner cavity (4).

5. An anti-seize drill bit for quick tripping according to claim 3 or 4, characterized in that: the end of the drill rod (1) is provided with an upper connector (101) and a lower connector (102) which are installed in a threaded fit mode, and an upper opening of the inner cavity (4) is plugged through the end face of the upper connector (101).

6. An anti-seize drill bit for rapid tripping according to claim 5, wherein: a plurality of inner cavities (4) are circumferentially arranged on the drill rod (1).

7. An anti-seize drill bit for rapid tripping according to claim 6, wherein: the inner cavity (4) is a cavity with a large upper part and a small lower part, so that sundries can be cleaned conveniently.

8. An anti-seize drill bit for use in rapid tripping according to claim 7, wherein: the piston block (5) is installed with the upper wall and the lower wall of the inner cavity (4) in a matching way through a sliding groove.