CN220015095U

CN220015095U - Well flushing valve

Info

Publication number: CN220015095U
Application number: CN202321410316.9U
Authority: CN
Inventors: 苗金华; 王德营
Original assignee: Jinan Yuanchuang Petroleum Technology Development Co ltd
Current assignee: Jinan Yuanchuang Petroleum Technology Development Co ltd
Priority date: 2023-06-05
Filing date: 2023-06-05
Publication date: 2023-11-14
Anticipated expiration: 2033-06-05

Abstract

The utility model discloses a well flushing valve which comprises a shell and a valve body, wherein an upper joint and a guide head are respectively arranged at two ends of the shell, the valve body is fixedly arranged in the upper joint, a baffle disc is fixedly arranged at one end, close to the guide head, in the shell, a guide pipe is arranged between the baffle disc and the valve body, and a sealing ball is arranged in the guide pipe. When the well completion is pressurized, slurry enters the guide pipe through the first liquid inlet and the second liquid inlet, and the sealing ball can be tightly blocked at one end of the valve body under the action of the pressure in the well and the elasticity of the reset spring; when the well is required to be washed, the sealing insertion pipe is inserted into the guide pipe through the valve body, the sealing ball can be moved downwards, at the moment, external well washing liquid can enter the guide pipe through the third liquid inlet of the sealing insertion pipe, then the external well washing liquid is discharged into the well through the first liquid inlet and the second liquid inlet, the well washing effect is achieved, the integral structure is simpler, the operation is also simple, and therefore the working efficiency of workers is improved.

Description

Well flushing valve

Technical Field

The utility model relates to the technical field of oil well exploitation equipment, in particular to a well flushing valve.

Background

In the sand prevention completion process of an oil and gas well, in order to remove pollution of slurry to a reservoir and blockage of a screen pipe, an integrated process of slurry replacement, well washing and sand prevention is generally required. The well flushing process is completed by installing a well flushing valve at the tail end of the sieve tube column. When slurry replacement and well flushing operations are carried out, the well flushing valve is required to be opened by independently feeding the well flushing pipe string, and the well flushing valve is closed by lifting the well flushing pipe string after well flushing.

The well flushing valve is used as an important matched tool of a layered water injection pipe column, is mostly based on a uniflow valve principle, and mainly comprises the following functions: when the well completion is pressurized, the pipe column is sealed, and the packer is set by pressure holding; during well flushing, well flushing liquid enters the pipe column through the well flushing valve, so that the purpose of well flushing is achieved.

The existing well flushing valve has complicated structure, complicated operation steps and low efficiency of staff,

disclosure of Invention

The utility model aims to provide a well flushing valve.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a well flushing valve, includes casing and valve body, still includes top connection, direction head, sealed intubate, pipe and sealing ball, top connection and direction head are installed at the casing both ends respectively, valve body fixed mounting is inside the top connection, the inside one end fixed mounting that is close to the direction head position of casing has the fender dish, the pipe is installed and is put between fender dish and valve body, sealing ball is located the pipe, sealed intubate is used for inserting the pipe through the valve body in, first inlet and second inlet have been seted up respectively on casing and pipe surface, the third inlet has been seted up to sealed intubate's insertion end.

Preferably, a return spring is arranged in the guide pipe, and one end of the valve body is sealed by the sealing ball under the action of the elastic force of the return spring.

Preferably, the valve body is of a funnel-shaped structure, and a plurality of sealing rubber rings are fixedly arranged on the inner ring wall of the valve body.

Preferably, both ends of the guide pipe are respectively inserted into the baffle disc and the valve body.

Preferably, the outer end part of the sealing cannula is fixedly provided with a limiting shaft sleeve, and the outer diameter of the limiting shaft sleeve is larger than that of the sealing cannula.

Preferably, the outer diameter of the sealing insertion tube corresponds to the diameter of the inner ring of the valve body.

Compared with the prior art, the utility model has the advantages that:

when the well completion is pressurized, slurry enters the guide pipe through the first liquid inlet and the second liquid inlet, and the sealing ball can be tightly blocked at one end of the valve body under the action of the pressure in the well and the elasticity of the reset spring; when the well is required to be washed, the sealing insertion pipe is inserted into the guide pipe through the valve body, the sealing ball can be moved downwards, at the moment, external well washing liquid can enter the guide pipe through the third liquid inlet of the sealing insertion pipe, then the external well washing liquid is discharged into the well through the first liquid inlet and the second liquid inlet, the well washing effect is achieved, the integral structure is simpler, the operation is also simple, and therefore the working efficiency of workers is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of a well cleanout valve of the present utility model.

In the figure: 1 a shell, 11 a first liquid inlet, 2 an upper joint, 3 a guide head, 4 a guide pipe, 41 a second liquid inlet, 5 a valve body, 51 a sealing rubber ring, 6 a sealing insertion pipe, 61 a limiting shaft sleeve, 62 a third liquid inlet, 7 a baffle disc, 8 a sealing ball and 9 a return spring.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

Referring to fig. 1, the utility model provides a well flushing valve, which comprises a casing 1, a valve body 5, an upper joint 2, a guide head 3, a sealing insertion tube 6, a guide tube 4 and a sealing ball 8, wherein the upper joint 2 and the guide head 3 are respectively arranged at two ends of the casing 1, the valve body 5 is fixedly arranged in the upper joint 2, a baffle disc 7 is fixedly arranged at one end, close to the position of the guide head 3, in the casing 1, a guide tube 4 is arranged between the baffle disc 7 and the valve body 5, the sealing ball 8 is positioned in the guide tube 4, the sealing insertion tube 6 is used for being inserted into the guide tube 4 through the valve body 5, a first liquid inlet 41 and a second liquid inlet 41 are respectively formed in the surfaces of the casing 1 and the guide tube 4, and a third liquid inlet 62 is formed in the insertion end of the sealing insertion tube 6.

In order to ensure that the sealing ball 8 can seal the valve body 5 during well completion, in this embodiment, a return spring 9 is installed inside the guide pipe 4, and one end of the valve body 5 is sealed by the sealing ball 8 under the action of the elastic force of the return spring 9.

In this embodiment, the valve body 5 has a funnel-shaped structure, and the inner ring wall of the valve body is fixedly provided with a plurality of sealing rubber rings 51, so as to increase the tightness.

Further, to ensure the stability of the conduit 4 in the valve body 5, in this embodiment, two ends of the conduit 4 are respectively inserted into the baffle disc 7 and the valve body 5.

Further, in this embodiment, the outer end portion of the sealed cannula 6 is fixedly provided with a limiting sleeve 61, the outer diameter of the limiting sleeve 61 is larger than the outer diameter of the sealed cannula 6, and the limiting sleeve 61 can ensure that the sealed cannula 6 can be inserted into a proper position in the catheter 4, so that a follow-up worker can take out the sealed cannula 6 conveniently.

In order to avoid overflow of the well-flushing liquid from the gap between the sealing cannula 6 and the valve body 5, in this embodiment, the outer diameter of the sealing cannula 6 corresponds to the inner diameter of the valve body 5.

The specific working steps are as follows: when the well completion is pressurized, slurry enters the guide pipe 4 through the first liquid inlet 11 and the second liquid inlet 41, and the sealing ball 8 can be tightly blocked at one end of the valve body 5 under the action of the pressure in the well and the elasticity of the return spring 9;

when well flushing is needed, the sealing insertion tube 6 is inserted into the guide tube 4 through the valve body 5, the sealing ball 8 can be moved downwards, at the moment, external well flushing liquid can enter the guide tube 4 through the third liquid inlet 62 of the sealing insertion tube 6, and then is discharged into the well through the first liquid inlet 11 and the second liquid inlet 41, so that a well flushing effect is achieved.

Although the embodiments of the present utility model have been described with reference to the accompanying drawings, the patentees may make various modifications or alterations within the scope of the appended claims, and are intended to be within the scope of the utility model as described in the claims.

Claims

1. The utility model provides a well flushing valve, includes casing and valve body, its characterized in that: still include top connection, direction head, sealed intubate, pipe and sealing ball, top connection and direction head are installed at the casing both ends respectively, valve body fixed mounting is inside the top connection, the inside one end fixed mounting that is close to direction head position of casing has the fender dish, the pipe is installed in the position between fender dish and valve body, sealing ball is located the pipe, sealed intubate is used for inserting the pipe through the valve body in, first inlet and second inlet have been seted up respectively on casing and pipe surface, the third inlet has been seted up to sealed intubate's insertion end.

2. A well cleanup valve as recited in claim 1, wherein: and a return spring is arranged in the guide pipe, and one end of the valve body is sealed by the sealing ball under the elastic action of the return spring.

3. A well cleanup valve as recited in claim 1, wherein: the valve body is of a funnel-shaped structure, and a plurality of sealing rubber rings are fixedly arranged on the inner ring wall of the valve body.

4. A well cleanup valve as recited in claim 1, wherein: and two ends of the guide pipe are respectively inserted into the baffle disc and the valve body.

5. A well cleanup valve as recited in claim 1, wherein: the outer end part of the sealing cannula is fixedly provided with a limiting shaft sleeve, and the outer diameter of the limiting shaft sleeve is larger than that of the sealing cannula.

6. A well cleanup valve as recited in claim 1, wherein: the outer diameter of the sealing insertion pipe corresponds to the diameter of the inner ring of the valve body.