CN209083270U

CN209083270U - Injection valve

Info

Publication number: CN209083270U
Application number: CN201821510302.3U
Authority: CN
Inventors: 王丽莉; 史策; 寇微; 张静波; 张国龙; 张越; 刘森; 赵凡; 戴双宁; 彭志会
Original assignee: China Petroleum and Natural Gas Co Ltd
Current assignee: China Petroleum and Natural Gas Co Ltd
Priority date: 2018-09-14
Filing date: 2018-09-14
Publication date: 2019-07-09
Anticipated expiration: 2028-09-14

Abstract

The utility model is a kind of injection valve, includes central tube, the upper and lower end of central tube is connected separately with top connection and lower contact；Central tube outside wall surface is arranged with a piston bush；With being located on the outside of central tube, liquid cylinder upper end is fixedly connected one liquid cylinder with top connection outer wall, the outer wall that liquid cylinder lower end is fixed on piston bush by cutting pin；Annular accommodating space is formed between central tube and liquid cylinder, the position of corresponding annular accommodating space is equipped with inlet opening on central tube tube wall；Piston bush inner wall is equipped with an annular groove, and a retaining ring is arranged in the annular groove, towards being equipped with a plurality of first zigzag gear ring along its circumferential direction on the inner wall of central tube in retaining ring；Lower section in central tube outside wall surface and positioned at piston bush is circumferentially equipped with a plurality of the second zigzag gear ring for cooperating with the first zigzag gear ring and retaining ring being prevented to move up along central tube.The utility model, which can be realized, reduces fluid viscosity loss, prevents injection hydraulic shock casing, meets live needs.

Description

Injection valve

Technical field

The utility model is poly-, water filling device more particularly to a kind of injection valve about straight well oil well delamination note.

Background technique

Chemical flooding is the main means that mid-later development phase water drive sandstone reservoirs improve recovery ratio, is in the prior art usually to adopt Layered polymer injection (polymer injection) is used for existing separate layer water injection string and tool.But divided using existing separate layer water injection string When layer note is poly-, after existing injection valve is opened, the fluid of injection can directly impact casing, and into stratum, the viscous damage of injection is larger, cannot Meet chemical flooding injection to require.

The present inventor based on years of experience and practice in relevant industries, proposes a kind of injection valve as a result, existing to overcome There is the defect of technology.

Utility model content

The purpose of this utility model is to provide a kind of injection valves, consider oil reservoir and process requirements, two layers of note of concentric double pipe Enter mode and realizes that oil field middle and later periods layered polymer injection is developed；When injection technology fluid viscosity requires, it is possible to reduce fluid is viscous Degree loss meets live needs.

The purpose of this utility model is achieved in that a kind of injection valve, includes central tube, the upper and lower end of central tube It is connected separately with top connection and lower contact；Central tube outside wall surface is arranged with a piston bush；One liquid cylinder is same to be located in outside central tube Side, liquid cylinder upper end are fixedly connected with top connection outer wall, the outer wall that liquid cylinder lower end is fixed on piston bush by cutting pin；In Annular accommodating space is formed between heart pipe and liquid cylinder, the position of corresponding annular accommodating space is equipped with feed liquor on central tube tube wall Hole；Piston bush inner wall is equipped with an annular groove, and a retaining ring is arranged in the annular groove, towards the inner wall of central tube in retaining ring A plurality of first zigzag gear ring is equipped with along its circumferential direction on face；Lower section in central tube outside wall surface and positioned at piston bush, in Heart pipe is circumferentially equipped with a plurality of the second zigzag gear ring for cooperating with the first zigzag gear ring and retaining ring being prevented to move up.

In a better embodiment of the utility model, the side wall of the retaining ring is equipped with longitudinal cut.

In a better embodiment of the utility model, the upper and lower end of central tube joins with upper and lower joint screw thread respectively It connects；Liquid cylinder upper end is to be threadedly coupled and fixed by an anti-rotation pin with top connection outer wall.

In a better embodiment of the utility model, sealing member is equipped between liquid cylinder and top connection and piston bush Part；Sealing element also is provided between piston bush and central tube.

In a better embodiment of the utility model, the internal diameter of the central tube is 88.9mm；The aperture of inlet opening For 30mm.

From the above mentioned, the injection valve of the utility model considers oil reservoir and process requirements, using two layers of side of injection of concentric double pipe Formula realizes the exploitation of oil field middle and later periods layered polymer injection, and the fluid of injection does not impact casing directly and is directly entered stratum, into Enter annular accommodating space and just can enter stratum around liquid cylinder, thus may be implemented to reduce fluid viscosity loss, prevent from infusing Enter hydraulic shock casing, meets live needs.

Detailed description of the invention

Following drawings are only intended to schematically illustrate and explain the present invention, does not limit the model of the utility model It encloses.Wherein:

Fig. 1: for the structural schematic diagram of the utility model injection valve.

Fig. 2: for the structural schematic diagram of retaining ring in the utility model.

Fig. 3: for the schematic cross-sectional view of retaining ring in the utility model.

Fig. 4: for partial enlargement structural representation at I in Fig. 3.

Drawing reference numeral:

100, injection valve；

1, central tube；

11, inlet opening；

12, the second zigzag gear ring；

2, top connection；

3, lower contact；

4, piston bush；

41, annular groove；

5, liquid cylinder；

6, pin is cut；

7, annular accommodating space；

8, retaining ring；

81, the first zigzag gear ring；

82, longitudinal cut；

9, anti-rotation pin.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

In addition to non-individual defines the direction pointed out, the upper and lower equal directions being referred to herein are with the utility model Shown in subject to upper and lower equal directions in Fig. 1, illustrate in this together.

As shown in Figure 1 to 4, include central tube 1 the utility model proposes a kind of injection valve 100, central tube 1 it is upper, Lower end is connected separately with top connection 2 and lower contact 3；1 outside wall surface of central tube is arranged with a piston bush 4；One liquid cylinder 5 is located in together 1 outside of central tube, 5 upper end of liquid cylinder are fixedly connected with 2 outer wall of top connection, and 5 lower end of liquid cylinder is fixed on work by cutting pin 6 The outer wall of plug sleeve 4；Annular accommodating space 7, corresponding annular accommodating on 1 tube wall of central tube are formed between central tube 1 and liquid cylinder 5 The position in space 7 is equipped with inlet opening 11；4 inner wall of piston bush is equipped with an annular groove 41, and a retaining ring 8 is arranged in the annular groove 41 It is interior, towards being equipped with a plurality of first zigzag gear ring 81 along its circumferential direction on the inner wall of central tube in retaining ring 8；In central tube 1 In outside wall surface and be located at the lower section of piston bush 4, along central tube 1 it is circumferential be equipped with it is a plurality of can be with the first zigzag gear ring 81 with merging The the second zigzag gear ring 12 for preventing retaining ring 8 from moving up.

Connect by top connection 2 with injection string when the injection valve work of the utility model, injection valve 100 under tubing string to phase After the injection level answered, injection string is set, and then, fluid (polymer) enters annular accommodating through the inlet opening 11 of central tube 1 Space 7 pushes piston bush 4 and 8 downlink of retaining ring, cuts pin 6 and is cut, when piston bush 4 and retaining ring 8 comes downwards to and center When the second zigzag gear ring (locking tooth) 12 on pipe 1 is clamped, piston bush 4 and retaining ring 8 are locked completely, can be prevented in this way Casing inner tube pressure backs up piston bush 4, and flow channels are completely exposed at this time, and injection valve 100 can carry out layered polymer injection work Industry.

Further, in the present embodiment, the side wall of the retaining ring 8 is equipped with longitudinal cut 82, is more convenient for locking in this way Tight ring 8 and the second zigzag gear ring 12 are engaged by clamping.

The upper and lower end of central tube 1 respectively with top connection 2,3 thread connection of lower contact；Outside 5 upper end of liquid cylinder and top connection 2 Wall is to be threadedly coupled and fixed by an anti-rotation pin 9.

Sealing element is equipped between liquid cylinder 5 and top connection 2 and piston bush 4；It is also set between piston bush 4 and central tube 1 There is sealing element；In the present embodiment, the sealing element is cushion rubber.

In the present embodiment, the internal diameter of the central tube 1 is 88.9mm；The aperture of inlet opening 11 is 30mm.

Inlet opening and flow channels design bigger in the injection valve of the utility model, cannot be only used for layered polymer injection, It can also be used for seperated layer water injection, fluid cushion may be implemented, when injection technology fluid viscosity requires, the use of the new type can be with Fluid viscosity loss is reduced, injection hydraulic shock casing is prevented, meets live needs.

The above descriptions are merely exemplary embodiments of the present utility model, the model being not intended to limit the utility model It encloses.Any those skilled in the art, made equivalent change under the premise of not departing from the conceptions and principles of the utility model Change and modify, should belong to the range of the utility model protection.

Claims

1. a kind of injection valve, which is characterized in that include central tube, the upper and lower end of central tube is connected separately with top connection under Connector；Central tube outside wall surface is arranged with a piston bush；One liquid cylinder is same to be located on the outside of central tube, liquid cylinder upper end and top connection Outer wall is fixedly connected, the outer wall that liquid cylinder lower end is fixed on piston bush by cutting pin；It is formed between central tube and liquid cylinder There is annular accommodating space, the position of corresponding annular accommodating space is equipped with inlet opening on central tube tube wall；It is set on piston bush inner wall There is an annular groove, a retaining ring is arranged in the annular groove, towards being equipped on the inner wall of central tube along its circumferential direction in retaining ring A plurality of first zigzag gear ring；Lower section in central tube outside wall surface and positioned at piston bush, is circumferentially equipped with a plurality of along central tube The the second zigzag gear ring for cooperating with the first zigzag gear ring and retaining ring being prevented to move up.

2. injection valve as described in claim 1, which is characterized in that the side wall of the retaining ring is equipped with longitudinal cut.

3. injection valve as described in claim 1, which is characterized in that the upper and lower end of central tube joins with upper and lower joint screw thread respectively It connects；Liquid cylinder upper end is to be threadedly coupled and fixed by an anti-rotation pin with top connection outer wall.

4. injection valve as described in claim 1, which is characterized in that be equipped with sealing between liquid cylinder and top connection and piston bush Element；Sealing element also is provided between piston bush and central tube.

5. injection valve as described in claim 1, which is characterized in that the internal diameter of the central tube is 88.9mm；The hole of inlet opening Diameter is 30mm.