Hydraulic control type high-temperature medicament injector

Abstract

The utility model discloses a hydraulic control type high-temperature medicament injector which comprises a main valve body and a one-way valve set movably connected with one side of the main valve body. The one-way valve set comprises a valve body, and the upper end and the lower end of the valve body are connected with an inlet end valve deck and an outlet end valve deck respectively. An annular boss is formed in the center of the valve body and divides the valve body into an upper cavity and a lower cavity which are communicated, a first steel ball is arranged in the upper cavity, a first spring is arranged between the first steel ball and the annular boss, a second steel ball is arranged in the lower cavity, and a second spring is arranged between the second steel ball and the outlet end valve cover. The medicament injection channel has a non-return function, when the starting pressure is less than 0.5 MPa, the non-return valve groups are automatically closed, and the two non-return valve groups are adopted to provide double insurance, so that the non-return function is more reliable, and high temperature resistance and high pressure resistance are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to thick oil thermal recovery well development oil production tool field, especially a kind of liquid control type high-temperature medicament injector. BACKGROUND

[0002] In the oilfield development process, for the thick oil well with large viscosity, the downhole injection of high-temperature steam is used for mining, and the injected steam contains CO2, O2 and other gases, which can cause corrosion of downhole oil casing and cause downhole accidents, affecting the development effect of oil well. Therefore, in the process of injecting steam, small-dose chemical agents are injected at the same time to prevent corrosion and perforation of downhole oil casing. Therefore, it is of great significance to develop a matching liquid control type high-temperature medicament injection tool. SUMMARY

[0003] The utility model discloses a liquid control type high-temperature medicament injector to solve the above technical problem.

[0004] The utility model discloses the following technical scheme is adopted to be realized.

[0005] A kind of liquid control type high-temperature medicament injector, including main valve body and the one-way valve group with the one side of main valve body movably connected;The one-way valve group includes valve body, and the upper and lower ends of valve body are connected with inlet end valve cover and outlet end valve cover respectively;The central part of valve body forms annular boss, annular boss divides valve body into two upper and lower communicating chambers, steel ball one is provided in upper chamber, spring one is provided between steel ball one and annular boss, steel ball two is provided in lower chamber, spring two is provided between steel ball two and outlet end valve cover.

[0006] Further, the main valve body includes a body, a through main channel is formed in the body, an injection channel is provided on one side of the main channel, and the lower part of the injection channel is communicated with the main channel. A filter screen is provided in the main channel at the communication position of the main channel and the injection channel.

[0007] Further, a sealing gasket one is provided between the inlet end valve cover and the valve body.

[0008] Further, a sealing gasket two is provided between the valve body and the outlet end valve cover.

[0009] Further, the upper end of the inlet end valve cover is provided with a clamping sleeve assembly for connecting with the chemical agent injection pipeline.

[0010] The present application has the following beneficial effects.

[0011] The utility model discloses a continuous addition of reagent to the oil pipe under high temperature environment, and can prevent reflux, reliable sealing, easy operation, in addition, the utility model discloses two sets of check valve groups provide double insurance, make the check function more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the structure schematic diagram of the utility model;

[0013] Fig. 2 It is the structure schematic diagram of the utility model single valve group.

[0014] Among them, 1, check valve group;101, sleeve assembly;102, import end valve cover;103, sealing gasket one;104, steel ball one;105, spring one;106, valve body;107, steel ball two;108, spring two;109, sealing gasket two;110, export end valve cover;2, main valve body;3, filter screen. DETAILED DESCRIPTION

[0015] The following further describes the patent application in combination with examples.

[0016] As Figs. 1-2 The utility model discloses a hydraulic control type high temperature reagent injector, including check valve group 1 and main valve body 2. Single valve group 1 includes sleeve assembly 101, import end valve cover 102, sealing gasket one 103, steel ball one 104, spring one 105, valve body 106, steel ball two 107, spring two 108, sealing gasket two 109, export end valve cover 110.

[0017] The main valve body 2 adopts eccentric short section, including the body, the through main channel is formed in the body, and the filter screen 3 is arranged in the main channel. The end face of one side of the main channel is designed with the injection channel, and the lower part of the injection channel is communicated with the main channel, and the filter screen 3 is arranged at the communication of the main channel and the injection channel.

[0018] The check valve group 1 is connected together with the injection channel in the main valve body 2 through the export end valve cover 110, and is connected with the chemical agent injection pipeline through the sleeve assembly 101.

[0019] A set of check valve assembly is arranged in the upper cavity and the lower cavity of the valve body 106 respectively. The steel ball one 104 is supported at the lower end of the steel ball between the lower end tapered surface of the import end valve cover 102 and the steel ball one 104 in the upper cavity, and the spring one 105 is sleeved on the upper cavity of the valve body 106. The steel ball two 107 is supported at the lower end of the steel ball between the tapered surface of the valve body 106 and the steel ball two 107 in the lower cavity, and the spring two 108 is sleeved on the export end valve cover 110. The lower end tapered surface of the import end valve cover 102 and the tapered surface of the valve body 106 in the lower cavity are all hard alloy by thermal spraying, and the sealing between the steel ball is reliable and durable.

[0020] The valve group also comprises two sealing gaskets, the sealing gasket one 103 between the inlet end valve cover 102 and the valve body 106 ensures the close fit between the valve cover and the valve body, similarly, the sealing gasket two 109 between the outlet end valve cover 110 and the valve body 106 ensures the close fit between the valve cover and the valve body, ensuring that the medicament does not flow out from the gap between the valve cover and the valve body after the check valve group is closed.

[0021] The main body material of the utility model adopts 9Cr1Mo, which can resist high temperature and high pressure.

[0022] The utility model discloses a liquid control pipeline can inject the corrosion inhibitor into the oil pipe, and the sleeve assembly 101 of one-way valve group 1 connects the chemical agent injection pipeline, and the liquid control type high temperature medicament injector is down to the design position with the pipe column, and when needing to add the chemical agent, the pipeline is pressed, and the hydraulic pressure is transferred to the valve group, when the pressure is greater than 0.5MPa, pushes away steel ball one 104 and steel ball two 107, and spring one 105 and spring two 108 are compressed, and the medicament passes through filter screen 3 and enters the oil pipe. When starting pressure is less than 0.5MPa after stopping pressing, the steel ball resets under the spring action, and the sealing ball seat is closed, and the check valve group is automatically closed. The two groups of check valve groups provided by the application provide double insurance, so that the check function is more reliable.

[0023] The embodiments of the specific embodiment are the preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: all equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A hydraulically controlled high temperature medicament injector, characterized by: The utility model relates to a chemical agent injection valve, including main valve body (2) and with one way valve group (1) one side movable connection of main valve body (2), one way valve group (1) including valve body (106), the upper and lower both ends of valve body (106) are connected import end valve cover (102) and export end valve cover (110) respectively, the central formation annular boss of valve body (106) will valve body (106) be divided into upper, lower two intercommunication chambers, be equipped with steel ball one (104) in upper chamber, be equipped with spring one (105) between steel ball one (104) and annular boss, be equipped with steel ball two (107) in lower chamber, be equipped with spring two (108) between steel ball two (107) and export end valve cover (110).

2. The hydraulic control type high-temperature medicine injector according to claim 1, wherein: The main valve body (2) includes a body, a through main channel is formed in the body, an injection channel is provided on one side of the main channel, the lower part of the injection channel is communicated with the main channel, and a filter screen (3) is arranged at the communication position of the main channel and the injection channel in the main channel.

3. The hydraulic check valve of claim 1, wherein: A sealing gasket one (103) is arranged between the import end valve cover (102) and the valve body (106).

4. The hydraulic check valve of claim 1, wherein: A sealing gasket two (109) is arranged between the valve body (106) and the export end valve cover (110).

5. The hydraulic check valve of claim 1, wherein: The upper end of the import end valve cover (102) is provided with a clamping sleeve assembly (101) for connecting with a chemical agent injection pipeline.

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