WO2014019154A1

WO2014019154A1 - Well flushing valve

Info

Publication number: WO2014019154A1
Application number: PCT/CN2012/079463
Authority: WO
Inventors: 易会安; 谢红英; 温干亮; 陈善饮; 丁柏松; 昝志恩; 李伯仁; 刘妙仁; 易齐尊; 陶正
Original assignee: 思达斯易能源技术(集团)有限公司
Priority date: 2012-08-01
Filing date: 2012-08-01
Publication date: 2014-02-06

Abstract

A well flushing valve comprises: a valve housing components (10), wherein the valve housing components (10) comprises an upper housing connector (11), an intermediate housing connector (12), and a lower housing connector (13), the upper housing connector (11), the intermediate housing connector (12), and the lower housing connector (13) together form a cylindrical accommodation space (16); a valve core component (20), wherein the valve core component (20) is arranged in the accommodation space (16), and comprises a first valve core structure (21) arranged in an accommodation space corresponding to the intermediate housing connector (12), a second valve core structure (22) arranged in an accommodation space corresponding to the lower housing connector (13), and a ball pushing rod (23), arranged between the first valve core structure (21) and the second valve core structure (22) so as to implement linkage between a first valve and a second valve; and an insertion component (30), used for being inserted in the valve housing components (10) so as to drive the valve core component (20), wherein the lower part of the insertion component (30) is provided with a through hole (321) so as to form a channel with an opening of a guide shoe (14), to implement automatic grouting. The well flushing valve can conveniently implement functions of automatic grouting and normal and reverse circular well flushing according to requirements of the well flushing operation.

Description

Well washing valve

Technical field

The invention relates to a well washing device, in particular to a well washing valve which can conveniently realize automatic grouting and positive and reverse circulation washing. Background technique

At present, in the completion of the completion of the well completion, it is necessary to carry out the well washing operation in consideration of cleaning the pollutants in the well. The usual well-washing shoes can be matched with the washing column to establish a positive circulation well-passing channel, effectively flushing sand bridges or other blockages that may be encountered, but during the drilling process, the shoes are washed One-way valves require manual grouting to maintain the pressure balance between the inner and outer columns, which increases the time and complexity of the operation. Invention disclosure

The main object of the present invention is to provide a well washing valve which can easily realize automatic grouting and positive and reverse circulation washing according to the needs of the well washing operation.

In order to achieve the above object, the present invention provides a well washing valve, which comprises:

Valve housing assembly, including

a joint on the outer casing, the inner wall of the joint on the outer casing is provided with a positioning portion;

a joint in the outer casing, the upper end of the joint in the outer casing is connected with the joint on the outer casing; the lower joint of the outer casing, the upper end of the lower joint of the outer casing is connected with the lower end of the joint in the outer casing, the joint on the outer casing, the joint in the outer casing and The lower casing joints together form a cylindrical receiving space;

a spool assembly disposed in the accommodating space, including

a first valve core structure disposed in an accommodating space corresponding to the joint in the outer casing; a second valve core structure disposed in an accommodating space corresponding to the lower joint of the outer casing; a top club disposed at the Between the first spool structure and the second spool structure to effect linkage of the first spool structure and the second spool structure;

An insertion assembly for inserting into the valve housing assembly to drive the valve core assembly, disposed above the first valve core structure and engaging with the positioning portion, and a through hole is disposed in a lower portion of the insertion assembly Take Automatically grout is formed by forming a passage with the opening of the shoe.

The above-mentioned washing valve, wherein the first spool structure comprises

a first ball seat disposed on an inner wall of the bottom end of the joint on the outer casing;

a first valve axially movable along an inner wall of the joint in the outer casing;

a first spring assembly disposed between the central sleeve of the top club and the first valve, the two ends of the first spring assembly respectively abutting against a top end of the centering sleeve of the top club and the The bottom end of the first valve.

The above-mentioned well washing valve, wherein the second valve core structure comprises

a second ball seat installed between the joint in the outer casing and the lower joint of the outer casing, wherein the outer wall of the second ball seat is provided with a seal ring and a seal formed between the lower joint of the outer casing;

a second central sleeve, which is mounted on the inner wall of the bottom end of the lower joint of the outer casing;

a second valve axially movable along an inner wall of the lower joint of the outer casing;

a second spring assembly disposed between the second central sleeve and the second valve, the two ends of the second spring assembly respectively abut against the top end of the second central sleeve and the second valve Bottom end.

The above-mentioned well washing valve, wherein the inserting assembly comprises

Insert the connector on the head;

Inserting a head joint connected to the insert head joint, the through hole being disposed at a lower portion of the insert head joint, the insert head joint and the shell upper joint being sealed by a seal; a head connected to the bottom end of the insertion head lower joint.

The above-mentioned well washing valve, wherein the valve casing assembly further comprises a shoe, the shoe is connected to a bottom end of the lower joint of the casing, and the bottom and lateral sides of the shoe are provided with an opening.

In the above-mentioned well washing valve, an anti-rotation screw is further disposed between the lower casing joint and the shoe. The above-described well washing valve, wherein the first spring assembly and/or the second spring assembly includes a spring and a spring connecting sleeve, and the spring is connected by the spring connecting sleeve.

The above-mentioned washing valve, wherein the top end of the top club is connected to the bottom end of the spring coupling sleeve of the first spring assembly through a top club sleeve, and the bottom end of the top club corresponds to the second The top of the valve is set.

In the above-mentioned well cleaning valve, the valve core assembly further includes a top club centering sleeve, and the top club centering sleeve is disposed at a top end of the second ball seat corresponding to the top club.

The above-mentioned well washing valve, wherein the positioning portion is an upper portion of an inner wall of a joint provided on the outer casing The conical surface of the insertion head is correspondingly provided with a positioning surface.

The invention is described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural view of a well washing valve according to an embodiment of the present invention (a schematic sectional structure of the right half side); FIG. 2 is a schematic view showing the working state of the washing valve of FIG.

Wherein, the reference numeral

10 valve housing assembly

11 housing connector

111 Positioning Department

12 housing connector

13 housing lower connector

14 shoes

141 anti-rotation screw

15 seals

16 accommodation space

20 spool assembly

21 first spool structure

211 first tee

212 first valve

213 first spring assembly

22 second spool structure

220 second tee

221 second righting sleeve

222 second valve

223 second spring assembly

224 spring connection sleeve

23 top club

231 top club connection sleeve 24 top club set

30 Insert component

31 Insert the head connector

311 positioning surface

32 Insert the head connector

321 through hole

33 plugs the best way to achieve the invention

The structural principle and working principle of the present invention will be specifically described below with reference to the accompanying drawings:

1 and FIG. 2, FIG. 1 is a schematic structural view of a well washing valve according to an embodiment of the present invention (a schematic sectional structure of the right half side), and FIG. 2 is a schematic view showing the working state of the washing valve of FIG. The well washing valve of the present invention includes a valve housing assembly 10, a spool assembly 20, and an insert assembly 30. The valve housing assembly 10 includes: a housing upper joint 11, the inner wall of the outer joint 11 of the outer casing is provided with a positioning portion, the bottom portion is provided with a first ball seat 211 and a first valve 212 to form a seal; the outer casing joint 12, the outer casing The upper end of the middle joint 12 is connected to the joint 11 on the outer casing, the lower joint 13 of the outer casing, the upper end of the lower joint 13 of the outer casing is connected to the lower end of the joint 12 in the outer casing, and the joint 12 in the outer casing is fixed to the lower joint 13 of the outer casing. The second ball seat 220 forms a seal with the second valve 222, and the outer wall of the second ball seat 220 is provided with a seal between the seal ring and the lower casing joint 13, the outer casing joint 11, the joint 12 in the outer casing and the The outer casing joints 13 together form a cylindrical receiving space 16. The positioning portion 111 is disposed on the outer joint 11 of the outer casing. In the embodiment, the positioning portion 111 is preferably a conical surface disposed on an upper portion of the inner wall of the joint 11 on the outer casing. 311. In this embodiment, the lower end surface of the connector 3 on the head can be inserted as the positioning surface 311. However, the present invention is not limited thereto, and the positioning portion 111 can also be disposed in other forms as long as the insertion assembly 30 can be prevented from continuing downward when the insertion assembly 30 is lowered to a certain position; the sealing member 15 is disposed on the outer joint 11 of the outer casing. The inner surface is for sealing the gap between the joint 11 on the outer casing and the insert assembly 30. The seal 15 preferably seals the rubber ring, but is not limited thereto. The outer joint 13 and the joint between the joint 12 in the outer casing and the joint 11 on the outer casing may be connected by a common connection such as splicing, screwing or integral molding, preferably a threaded connection. In a preferred embodiment of the present invention, the valve casing assembly 10 further includes a shoe 14 that is coupled to the lower casing joint 13. The shoe 14 is provided with an opening at the bottom and lateral sides thereof, and the shoe 14 and the casing Lower joint 13 The connection mode may be a common connection such as splicing, screwing or integral molding, preferably a threaded connection, and the shoe 14 and the lower casing 13 may be further connected by an anti-rotation screw 141.

The valve core assembly 20 is disposed inside the valve casing assembly 10, and the valve core assembly 20 is disposed in the accommodating space 15, and includes a first valve core structure 21 disposed in an accommodating space corresponding to the joint 12 in the outer casing. a second valve core structure 22 disposed in the accommodating space 16 corresponding to the lower casing 13 of the casing; a top club 23 disposed on the first valve core structure 21 and the second valve core structure The linkage between the first spool structure 21 and the second spool structure 22 is achieved between 22 . In this embodiment, the first valve core structure 21 includes a first ball seat 211 mounted on the inner wall of the bottom end of the joint 11 on the outer casing; the first valve 212 is axially movable along the inner wall of the joint 12 in the outer casing. a first spring assembly 213 is disposed between the central sleeve 24 of the top club and the first valve 212, and the two ends of the first spring assembly 213 respectively abut against the right pole of the top club The top end of the sleeve 24 and the bottom end of the first valve 212. The second valve core structure 22 includes a second central locking sleeve 221 mounted on the inner wall of the bottom end of the lower casing 13 of the outer casing; the second valve 222 is axially movable along the inner wall of the lower casing 13 of the outer casing; An assembly 223 is disposed between the second central locking sleeve 221 and the second valve 222, and two ends of the second spring assembly 223 abut against the top end of the second central locking sleeve 221 and the second The bottom end of valve 222.

The first spring assembly 213 and the second spring assembly 223 may be composed of only one spring, or may be composed of a plurality of springs connected by the spring connection sleeve 224; the second ball seat 220 and the top club The sleeve 24 can be selected from a split design or an overall design.

The insertion assembly 30 is inserted into the interior of the valve casing assembly 10 to drive the valve core assembly 20, and is disposed above the first valve core structure and engaged with the positioning portion 111. The lower portion of the insertion assembly 30 is provided with a through hole 321 to The opening of the shoe 14 forms a channel for automatic grouting. More specifically, the insertion assembly 30 includes: an insertion head joint 31 which is blocked by the positioning portion 111 when the insertion assembly 30 is inserted into the valve casing assembly 10 during the well washing, so that the insertion assembly 30 cannot The lower head joint 32 is inserted, and is connected to the insert head joint 31, and is sealed with the outer casing joint 11 of the valve casing assembly 10 by a sealing member 15. The lower side wall of the insert head joint 32 is provided with a through hole 321 The connection between the insert head joint 32 and the insert head joint 31 may be a common connection method such as splicing, screwing or integral molding; the plug 33 is connected to the lower portion of the insert head joint 32, and the plug 33 is The connection between the insert head joints 32 can be selected from the usual connection methods such as splicing, screwing or integral molding.

In the well washing valve of the present invention, when the insert assembly 30 is not in operation, see Fig. 1, the first valve 212 and the The two valves 222 are respectively in a closed state under the preloading force of the springs of the first spring assembly 213 and the second spring assembly 223, and at this time, the liquid in the well is blocked by the first valve 212 and the second valve 222 and cannot enter the valve housing assembly. 10 and the cavity between the insert assembly 30; during the construction operation, the valve assembly 10 is first lowered into the well, then the well string is connected to the insert assembly 30, drilled into the insert assembly 30, and the insert assembly 30 is brought into place The first first valve 212 moves downwardly and continues to be fed into the insertion assembly 30. The first spring assembly 213 is compressed and the second valve 222 is downwardly compressed by the top club 23 until the second spring assembly 223 is inserted. The positioning portion 111 of the joint 11 on the outer casing is locked and positioned. At this time, the first valve 212 and the second valve 222 are both in an open state, and the liquid in the well passes through the bottom of the shoe 14 and the lateral opening, and enters the valve casing assembly 10 and The cavity between the components 30 is inserted into the insertion assembly 30 through the through hole 321 inserted into the head joint 32, into the well string connected to the insertion assembly 30 and into the drilling tool, and the pipe column is always kept inside and outside. pressure Scale, automatic filling function. After the well string is placed in place, the positive and reverse circulation well washing functions can be realized through the above liquid passage. After the operation is completed, the insertion assembly 30 is raised into the well with the wash string. At this time, under the elastic force of the first spring assembly 213 and the second spring assembly 223, the first valve 212 and the second valve 222 are moved upward to return to the original position. A seal is formed in the first ball seat 211 and the second ball seat 220, respectively, and the first valve 212 and the second valve 222 are both in a closed state.

Further, the present invention can realize the functions of isolation, sealing and well washing by inserting the joint of the head joint 32, the joint 11 of the outer casing and the seal 15.

The invention may, of course, be embodied in various other embodiments and various modifications and changes can be made in accordance with the present invention without departing from the spirit and scope of the invention. Changes and modifications are intended to be included within the scope of the appended claims. Industrial applicability

The well cleaning valve of the invention adopts a double valve linkage structure design to make the sealing more reliable. Through the channel formed by the bottom of the shoe and the lateral opening and the through hole inserted into the lower part of the head joint, the automatic grouting function can be realized during the process of drilling and feeding into the inserting component, and the positive and reverse circulation washing can be realized after being put into place. Features. In addition, isolation, sealing and well-washing functions can be achieved by inserting the head joint, the fitting on the housing and the seal. The valve simplifies on-site construction procedures, simple operation, improved work efficiency, improved seal performance, environmental friendliness and avoiding complex situations.

Claims

claims

1. A well cleaning valve, characterized in that it includes:

Valve housing assembly, including

A connector on the shell, the inner wall of the connector on the shell is provided with a positioning portion;

The upper end of the shell middle connector is connected to the upper shell connector; the lower shell connector is connected to the upper end of the shell lower connector and the lower end of the shell middle connector, and the shell upper connector, the shell middle connector and The lower joints of the shell jointly form a cylindrical accommodation space.

The first valve core structure is arranged in the accommodation space corresponding to the joint in the housing; the second valve core structure is arranged in the accommodation space corresponding to the lower joint of the housing; the cue rod is arranged in the between the first valve core structure and the second valve core structure to achieve linkage between the first valve core structure and the second valve core structure; and

An insert assembly, used to be inserted into the valve housing assembly to drive the valve core assembly, is disposed above the first valve core structure and cooperates with the positioning portion to limit the position, and a through hole is provided in the lower part of the insert assembly Automatic grouting is achieved by forming a channel with the opening of the guide shoe.

2. The well cleaning valve of claim 1, wherein the first valve core structure includes a first ball seat installed on the inner wall of the bottom end of the upper joint of the housing;

The first valve can move axially along the inner wall of the joint in the housing;

The first spring component is disposed between the centering sleeve of the cue rod and the first valve. The two ends of the first spring component respectively abut against the top end of the centering sleeve of the cue rod and the first valve. The bottom end of the first valve.

3. The well cleaning valve according to claim 2, characterized in that the second valve core structure includes a second ball seat installed between the middle joint of the housing and the lower joint of the housing, the second ball seat The outer wall is provided with a sealing ring to form a seal between the lower joint of the housing;

The second centralizing sleeve is installed on the inner wall of the bottom end of the lower joint of the housing;

The second valve can move axially along the inner wall of the lower joint of the housing;

A second spring component is disposed between the second centering sleeve and the second valve, with both ends of the second spring component respectively abutting the top end of the second centering sleeve and the second valve. Bottom.

4. The well cleaning valve according to claim 3, wherein the insertion assembly includes a connector on the insertion head;

The lower connector of the insertion head is connected to the connector of the insertion head, the through hole is provided at the lower part of the lower connector of the insertion head, and the lower connector of the insertion head and the upper connector of the housing are sealed by a seal; and plugging head, connected to the bottom end of the connector under the insertion head.

5. The well cleaning valve according to claim 4, characterized in that, the valve housing assembly further includes a guide shoe, the guide shoe is connected to the bottom end of the lower joint of the housing, the bottom of the guide shoe and Openings are provided laterally.

6. The well cleaning valve according to claim 5, characterized in that an anti-rotation screw is provided between the lower joint of the housing and the guide shoe.

7. The well cleaning valve according to claim 2, wherein the first spring component and/or the second spring component include a spring and a spring connecting sleeve, and the spring is connected through the spring connecting sleeve.

8. The well cleaning valve according to claim 3, wherein the first spring component and/or the second spring component include a spring and a spring connecting sleeve, and the spring is connected through the spring connecting sleeve.

9. The well cleaning valve according to claim 7, wherein the top end of the ejector rod is connected to the bottom end of the spring connection sleeve of the first spring assembly through the ejector rod sleeve. The bottom end is arranged corresponding to the top end of the second valve.

10. The well cleaning valve according to claim 8, wherein the top end of the ejector rod is connected to the bottom end of the spring connection sleeve of the first spring assembly through the ejector rod sleeve, and the ejector rod sleeve The bottom end is arranged corresponding to the top end of the second valve.

11. The well cleaning valve according to claim 9, wherein the valve core assembly further includes a cue rod centering sleeve, and the cue rod centering sleeve is provided on the second cue rod corresponding to the ejector rod. The top of the tee.

12. The well cleaning valve according to claim 10, wherein the valve core assembly further includes a cue rod centering sleeve, and the cue rod centering sleeve is arranged on the second cue rod corresponding to the ejector rod. The top of the tee.

13. The well cleaning valve according to claim 4, wherein the positioning part is a conical surface provided on the upper part of the inner wall of the connector on the housing, and the connector on the insertion head is provided with a corresponding positioning surface.

14. The well cleaning valve according to claim 5, characterized in that the positioning part is a conical surface provided on the upper part of the inner wall of the joint on the housing, and the joint on the insertion head is provided with a corresponding positioning surface.

15. The well cleaning valve according to claim 6, characterized in that the positioning part is a The conical surface on the upper part of the inner wall of the connector on the housing is provided with a positioning surface corresponding to the connector on the insertion head.

16. The well cleaning valve according to claim 8, characterized in that the positioning part is a conical surface provided on the upper part of the inner wall of the joint on the housing, and the joint on the insertion head is provided with a corresponding positioning surface.

17. The well cleaning valve according to claim 9, characterized in that the positioning part is a conical surface provided on the upper part of the inner wall of the joint on the housing, and the joint on the insertion head is provided with a corresponding positioning surface.

18. The well cleaning valve according to claim 10, characterized in that the positioning part is a conical surface provided on the upper part of the inner wall of the joint on the housing, and the joint on the insertion head is provided with a corresponding positioning surface.

19. The well cleaning valve according to claim 11, characterized in that the positioning part is a conical surface provided on the upper part of the inner wall of the joint on the housing, and the joint on the insertion head is provided with a corresponding positioning surface.

20. The well cleaning valve according to claim 12, characterized in that the positioning part is a conical surface provided on the upper part of the inner wall of the joint on the housing, and the joint on the insertion head is provided with a corresponding positioning surface.