CN219692326U - Screw drilling tool bi-directional valve and bi-directional valve screw drilling tool - Google Patents

Abstract

The utility model relates to a screw drilling tool bi-directional valve and a bi-directional valve screw drilling tool, comprising a valve body, a valve core, a spring, a valve sleeve and a sealing ring, wherein the valve body is provided with a main flow channel and a bypass flow channel; under the action of external force, the valve core moves downwards to a stroke bottom dead center, and at the moment, the first flow passage and the second flow passage of the valve core are closed and opened. The utility model has double functions of bypass and backstop, and can automatically close the bypass when drilling normally; when the pump pressure is reduced or the pump is stopped, the first flow channel can be automatically opened to realize bypass, the second flow channel is synchronously closed, the bypass on the upper part of the valve core is realized, the lower part of the valve core prevents mud from flowing backwards into the screw drilling tool, the blockage or braking of the flow channel is avoided, and the service life of the screw drilling tool is prolonged.

Description

Screw drilling tool bi-directional valve and bi-directional valve screw drilling tool

Technical Field

The utility model relates to the technical field of valves, in particular to a screw drilling tool bi-directional valve and a bi-directional valve screw drilling tool.

Background

The screw drilling tool is a volumetric underground power drilling tool which uses drilling fluid as power and converts hydraulic energy into mechanical energy. When mud pumped by the mud pump flows through the bypass valve to enter the motor, the rotor is pushed to rotate around the axis of the stator under the action of pressure difference, and the rotating speed and the torque are transmitted to the drill bit through the universal shaft and the transmission shaft, so that drilling operation is realized.

Wherein the bypass valve is installed in the screw drilling tool uppermost end, and its effect is:

during tripping, drilling fluid in a well bore is introduced into a drill string through a bypass valve, so that the resistance in the tripping process is reduced; when the drilling tool is started, drilling fluid flows into the annulus from the drill rod through the side hole of the bypass valve, so that mud is not overflowed on a well table;

the bypass valve is mainly made of a valve body, a valve core, a valve sleeve, a spring, a sealing piece, a sieve plate and the like. When the drilling tool works, high-pressure drilling fluid flows through the bypass valve to push the valve core, the compression spring closes the side hole of the bypass valve, and all the drilling fluid flows through the motor to convert pressure energy into mechanical energy. When the pump is stopped or the pressure is reduced, the valve core is lifted by the spring, so that the bypass flow channel is opened, the drilling fluid in the drill string flows into the annulus, and the platform is not polluted when the drill string tool is disassembled and assembled.

But the problems existing at present are: when the drilling fluid pressure is reduced to bypass, the pressure of the well annulus is larger than the internal pressure of the screw drilling tool, and a part of drill cuttings carrying the bottom of the well can enter the screw drilling tool from the drill bit water hole to accumulate, so that a flow passage is blocked or braked, and the screw drilling tool cannot be used continuously.

Disclosure of Invention

The utility model provides a screw drilling tool bi-directional valve and a bi-directional valve screw drilling tool for solving the technical problems.

The utility model is realized by the following technical scheme:

the utility model provides a screw drilling tool bi-directional valve, which comprises a valve body, a valve core, a spring, a valve sleeve and a sealing ring, wherein the valve body is provided with an axial main flow channel and a bypass flow channel; the valve core is provided with a valve core main flow passage, a first flow passage and a second flow passage, the first flow passage is positioned above the second flow passage, and one end of the valve core main flow passage penetrates through the upper end face of the valve core; one end of the first flow channel is communicated with the main flow channel of the valve core, and the other end of the first flow channel penetrates through the outer side wall of the lower section of the valve core; one end of the second flow passage is communicated with the main flow passage of the valve core, and the other end of the second flow passage penetrates through the outer side wall of the lower section of the valve core;

the spring is arranged between the valve core and the valve body or between the valve core and the valve sleeve, the valve core is positioned at the stroke top dead center under the action of the elasticity of the spring, at the moment, the second flow passage of the valve core is closed, and the first flow passage of the valve core is opened and then communicated with the bypass flow passage of the valve body; under the action of external force, the valve core compresses the spring and moves downwards to the stroke bottom dead center, at the moment, the first flow passage of the valve core is closed, and the second flow passage of the valve core is opened.

Optionally, the valve core comprises an upper section and a lower section, the upper section is in sliding fit with a main runner of the valve body, and a sealing ring is arranged between the outer circular surface of the upper section and the valve body; the lower section extends into the valve sleeve and is in sliding fit with the valve sleeve, and two sealing rings are arranged between the outer circular surface of the lower section of the valve core and the valve sleeve at intervals; when the valve core is positioned at the stroke top dead center, the second flow passage is positioned between the two sealing rings, and the first flow passage is positioned above the two sealing rings; when the valve core is positioned at the stroke bottom dead center, the first flow passage is positioned between the two sealing rings, and the second flow passage of the valve core is positioned below the two sealing rings.

Optionally, a filtering screen plate is installed in the bypass flow channel.

Optionally, the valve body has an inner step, the outer wall of the valve core has a third outer step, and when the upper end of the valve core is propped against the inner step of the valve body, the valve core is positioned at a stroke top dead center; when the third outer step of the valve core is propped against the upper end of the valve sleeve, the valve core is positioned at the stroke bottom dead center.

Optionally, the outer wall of the valve core is provided with a first outer step, the outer wall of the valve sleeve is provided with a second outer step, the spring is sleeved on the valve core and the valve sleeve, the upper end of the spring is propped against the first outer step of the valve core, and the lower end of the spring is propped against the second outer step of the valve sleeve.

Optionally, two annular grooves are formed in the inner wall of the valve sleeve, and the two sealing rings are respectively arranged in the two annular grooves in the inner wall of the valve sleeve; the outer wall of the valve sleeve is provided with an annular groove, and a sealing ring between the valve sleeve and the valve body is arranged in the annular groove of the outer wall of the valve sleeve.

Optionally, an outer wall of the upper section of the valve core is provided with an open-loop groove, and a sealing ring between the valve core and the valve body is arranged in the annular groove of the outer wall of the valve core.

Optionally, an axial blind hole is formed in the center of the valve core to form a valve core main flow channel, and a side hole is formed in the valve core to form a first flow channel and a second flow channel.

Preferably, the first flow passages are equally spaced in the circumferential direction by 2-4, and the second flow passages are equally spaced in the circumferential direction by 2-4.

The screw drilling tool with the two-way valve provided by the utility model comprises a motor and the two-way valve of the screw drilling tool, wherein the two-way valve of the screw drilling tool is arranged above the motor.

Compared with the prior art, the utility model has the following beneficial effects:

1, the utility model can realize the two-way effect of bypass and backstop, can close the bypass when drilling normally, can open the first flow passage automatically to realize the bypass when the pumping pressure is reduced or the pumping is stopped, and close the second flow passage synchronously, realize the upper bypass of the valve core, the lower part of the valve core prevents mud from flowing backwards into the screw drilling tool;

2, the utility model has simple and practical structure and can replace the original bypass valve of the screw drilling tool;

the structure of the utility model is equivalent to that of the existing bypass valve, and compared with the existing bypass valve, only valve core and valve sleeve components are changed, so that the utility model is economical and practical, and the cost is reduced;

and 4, the application range of the utility model is not influenced by the specification and the size, and the utility model can be improved on the basis of the existing bypass valve.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model.

FIG. 1 is a schematic diagram of a two-way valve of a screw drilling tool when a second flow passage is closed in an embodiment;

FIG. 2 is a schematic diagram of a two-way valve of a screw drilling tool when the first flow path is closed in an embodiment;

FIG. 3 is a schematic view of the structure of the valve body in the embodiment;

FIG. 4 is a schematic view of the structure of the valve element in the embodiment;

fig. 5 is a schematic view of the structure of the valve housing in the embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments. It will be apparent that the described embodiments are some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision. It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or directions or positional relationships conventionally put in place when the inventive product is used, or directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 and 2, the screw drilling tool bi-directional valve disclosed in the embodiment comprises a valve body 1, a valve core 2, a spring 3, a valve sleeve 4 and a sealing ring 6.

The valve body 1 is provided with an axial main flow channel and a bypass flow channel 11, one end of the bypass flow channel 11 is communicated with the main flow channel of the valve body 1, and the other end of the bypass flow channel penetrates through the outer surface of the valve body 1.

The valve sleeve 4 is axially fixed in the main flow passage of the valve body 1, and a sealing ring 6 is arranged between the valve sleeve and the main flow passage.

The valve core 2 is mounted in the valve body 1 and is axially movable within the valve core 2. The valve core 2 comprises an upper section and a lower section, wherein the upper section is in sliding fit with the main flow channel of the valve body 1, and the lower section extends into the valve sleeve 4 and is in sliding fit with the valve sleeve 4. Sealing rings 6 are arranged between the outer circular surface of the valve core 2 and the main flow passage of the valve body 1 and between the outer circular surface of the valve core 2 and the valve sleeve 4.

As shown in fig. 4, the valve core 2 is provided with a valve core main flow passage 21, a first flow passage 22 and a second flow passage 23, wherein the first flow passage 22 is positioned above the second flow passage 23, one end of the valve core main flow passage 21 penetrates through the upper end surface of the valve core 2, one end of the first flow passage 22 is communicated with the valve core main flow passage 21, and the other end penetrates through the outer side wall of the lower section of the valve core 2; one end of the second flow channel 23 is communicated with the valve core main flow channel 21, and the other end of the second flow channel penetrates through the outer side wall of the lower section of the valve core 2. Two sealing rings 6 are axially arranged between the outer circular surface of the lower section of the valve core 2 and the valve sleeve 4 at intervals.

An axial spring 3 is arranged between the valve core 2 and the valve body 1 or the valve sleeve 4, as shown in figure 1, under the action of the elasticity of the spring 3, the valve core 2 is positioned at a stroke top dead center, at the moment, a second flow passage 23 of the valve core 2 is positioned in the valve sleeve 4 and between two sealing rings 6, and a first flow passage 22 of the valve core 2 is exposed and then communicated with a bypass flow passage 11 of the valve body 1; as shown in fig. 2, when the valve core 2 compresses the spring 3 and moves downward to the stroke bottom dead center under the action of an external force, the first flow passage 22 of the valve core 2 is located in the valve sleeve 4 and between the two sealing rings 6, and the second flow passage 23 of the valve core 2 is exposed.

In order to facilitate connection with other components, in one possible design, the lower end of the valve body 1 is provided with external threads 12, as shown in fig. 3.

In one possible design, the valve body 1 has an inner step 13, and when the upper end of the valve core 2 is supported on the inner step 13 of the valve body 1 from bottom to top, the valve core 2 is located at the stroke top dead center.

In one possible design, the outer wall of the valve core 2 has a first outer step 24, the outer wall of the valve sleeve 4 has a second outer step 41, the spring 3 is sleeved on the valve core 2 and the valve sleeve 4, the upper end of the spring 3 is propped against the first outer step 24, and the lower end is propped against the second outer step 41.

In one possible design, the outer wall of the valve core 2 has a third outer land 25, and when the third outer land 25 abuts against the upper end of the valve sleeve 4, the valve core 2 moves to the stroke bottom dead center.

In one possible design, a filter screen 5 is installed in the bypass flow channel 11.

In one possible design, as shown in fig. 5, two annular grooves are formed on the inner wall of the valve sleeve 4, and two sealing rings 6 between the valve sleeve 4 and the valve core 2 are respectively arranged in the two annular grooves on the inner wall of the valve sleeve 4; the outer wall of the valve sleeve 4 is provided with an annular groove, and a sealing ring 6 between the valve sleeve 4 and the valve body 1 is arranged in the annular groove on the outer wall of the valve sleeve 4.

In one possible design, the outer wall of the upper section of the valve element 2 is provided with an open annular groove, and a sealing ring 6 between the valve element 2 and the valve body 1 is arranged in the annular groove of the outer wall of the valve element.

In one possible design, a blind axial hole is formed in the center of the valve core 2 to form a valve core main flow channel 21, and a side hole is formed in the lower section of the valve core 2 to form a first flow channel 22 and a second flow channel 23.

It should be noted that the number and shape of the first flow passages 22 and the second flow passages 23 are appropriately set as required.

In one possible design, the first flow passages 22 are equally spaced apart from 2 to 4 in the circumferential direction and the second flow passages 23 are equally spaced apart from 2 to 4 in the circumferential direction.

In one possible design, the first flow channel 22 is a circular hole and the second flow channel 23 is a circular hole such that the cross-sectional area of the second flow channel 23 is larger than the cross-sectional area of the first flow channel 22.

In one possible design, the sealing ring 6 is an O-ring.

The bi-directional valve screw drilling tool disclosed by the embodiment comprises a motor and a screw drilling tool bi-directional valve, wherein the screw drilling tool bi-directional valve is positioned above the motor.

The working principle of the embodiment is as follows:

when drilling normally, the high-pressure drilling fluid presses the valve core 2, overcomes static friction and the elasticity of the spring 3, so that the valve core 2 moves downwards, the first flow passage 22 is closed, and drilling fluid flows from the second flow passage 23 to the motor, thereby driving the rotor to rotate and driving the drill bit to operate, as shown in fig. 2;

when the pump pressure is lowered or the pump is stopped, the valve core 2 is lifted by the spring 3 so as to close the second flow channel 23, and the first flow channel 22 is communicated with the bypass flow channel 11, so that the upper bypass of the valve core 2 is realized, and the lower part prevents mud from flowing backwards to enter the double action of the screw drilling tool, as shown in figure 1.

When the bypass is realized by reducing the drilling fluid pressure, the pressure of the well hole annulus is larger than the internal pressure of the screw drilling tool, but the lower part of the valve core 2 is in sealing fit with the valve sleeve at the moment, so that the drilling fluid can be prevented from entering the screw drilling tool from the drill bit water hole, the blockage or braking of a flow passage is avoided, and the service life of the screw drilling tool is prolonged.

The foregoing detailed description of the utility model has been presented for purposes of illustration and description, and it should be understood that the utility model is not limited to the particular embodiments disclosed, but is intended to cover all modifications, equivalents, alternatives, and improvements within the spirit and principles of the utility model.

Claims (10)

1. The utility model provides a screw drilling tool bi-directional valve, includes valve body (1), case (2), spring (3), valve pocket (4) and sealing washer (6), valve body (1) have axial sprue and bypass runner (11), bypass runner (11) one end and the sprue intercommunication of valve body (1), and the other end runs through valve body (1) surface, and valve pocket (4) axial is fixed in the sprue of valve body (1), and case (2) are adorned in valve body (1) and can be at case (2) axial displacement, its characterized in that: the valve core (2) is provided with a valve core main flow passage (21), a first flow passage (22) and a second flow passage (23), the first flow passage (22) is positioned above the second flow passage (23), and one end of the valve core main flow passage (21) penetrates through the upper end face of the valve core (2); one end of the first flow channel (22) is communicated with the valve core main flow channel (21), and the other end of the first flow channel penetrates through the outer side wall of the lower section of the valve core (2); one end of the second flow channel (23) is communicated with the valve core main flow channel (21), and the other end of the second flow channel penetrates through the outer side wall of the lower section of the valve core (2);

the spring (3) is arranged between the valve core (2) and the valve body (1) or between the valve core (2) and the valve sleeve (4), the valve core (2) is positioned at the stroke top dead center under the elastic force of the spring (3), at the moment, the second flow passage (23) of the valve core (2) is closed, the first flow passage (22) of the valve core (2) is opened, and then the valve core is communicated with the bypass flow passage (11) of the valve body (1); under the action of external force, the valve core (2) compresses the spring (3) and moves downwards to a stroke bottom dead center, at the moment, the first flow passage (22) of the valve core (2) is closed, and the second flow passage (23) of the valve core (2) is opened.

2. The screw drilling tool bi-directional valve of claim 1 wherein: the valve core (2) comprises an upper section and a lower section, the upper section is in sliding fit with a main flow channel of the valve body (1), and a sealing ring (6) is arranged between the outer circular surface of the upper section and the valve body (1);

the lower section extends into the valve sleeve (4) and is in sliding fit with the valve sleeve (4), and two sealing rings (6) are arranged between the outer circular surface of the lower section of the valve core (2) and the valve sleeve (4) at intervals;

when the valve core (2) is positioned at the stroke top dead center, the second flow passage (23) is positioned between the two sealing rings (6), and the first flow passage (22) is positioned above the two sealing rings (6);

when the valve core (2) is positioned at the stroke bottom dead center, the first flow passage (22) is positioned between the two sealing rings (6), and the second flow passage (23) of the valve core (2) is positioned below the two sealing rings (6).

3. The screw drilling tool bi-directional valve of claim 1 wherein: a filter screen plate (5) is arranged in the bypass flow passage (11).

4. The screw drilling tool bi-directional valve of claim 1 wherein: the valve body (1) is provided with an inner step (13), the outer wall of the valve core (2) is provided with a third outer step (25),

when the upper end of the valve core (2) is propped against the inner step (13) of the valve body (1), the valve core (2) is positioned at the stroke top dead center;

when the third outer step (25) of the valve core (2) is propped against the upper end of the valve sleeve (4), the valve core (2) is positioned at the stroke bottom dead center.

5. The bi-directional valve of a progressive cavity drilling tool of claim 1 or 4, wherein: the outer wall of the valve core (2) is provided with a first outer step (24), the outer wall of the valve sleeve (4) is provided with a second outer step (41), the spring (3) is sleeved on the valve core (2) and the valve sleeve (4), the upper end of the spring (3) is propped against the first outer step (24) of the valve core (2), and the lower end of the spring is propped against the second outer step (41) of the valve sleeve (4).

6. The screw drilling tool bi-directional valve of claim 2 wherein: two annular grooves are formed in the inner wall of the valve sleeve (4), and the two sealing rings (6) are respectively arranged in the two annular grooves in the inner wall of the valve sleeve (4);

an annular groove is formed in the outer wall of the valve sleeve (4), and a sealing ring (6) between the valve sleeve (4) and the valve body (1) is arranged in the annular groove in the outer wall of the valve sleeve (4).

7. The screw drilling tool bi-directional valve of claim 2 wherein: an outer wall of the upper section of the valve core (2) is provided with an open-loop groove, and a sealing ring (6) between the valve core (2) and the valve body (1) is arranged in an annular groove of the outer wall of the valve core.

8. The screw drilling tool bi-directional valve of claim 1 wherein: a central axial blind hole of the valve core (2) is provided with a valve core main flow passage (21), and a side hole of the valve core (2) is provided with a first flow passage (22) and a second flow passage (23).

9. The bi-directional valve of screw drilling tools of claim 1 or 8, wherein: the first flow passages (22) are equally spaced in the circumferential direction by 2-4, and the second flow passages (23) are equally spaced in the circumferential direction by 2-4.

10. Two-way valve screw drilling tool, its characterized in that: comprising a motor and a screw drilling tool bi-directional valve according to any one of claims 1-9, said screw drilling tool bi-directional valve being located above the motor.