Replaceable injection device

Abstract

The invention discloses a replaceable injection device. The replaceable injection device comprises a shell, a nozzle, a mixing and expanding chamber and a structure parameter selection module, the shell is provided with a first inlet channel part, a converging part, a second inlet channel part and an outlet channel part, the first inlet channel part and the second inlet channel part communicate with a first gas well and a second gas well, the converging part correspondingly communicates with the downstream of each inlet channel part and the upstream of the outlet channel part, and the downstream of the outlet channel part communicates with an external conveying pipeline; the nozzle is detachably connected with the first inlet channel part; the mixing and expanding chamber is detachably connected with the outlet channel part; and the structure parameter selection module is used for acquiring real-time pressure outside an inlet of each inlet channel part and outside an outlet of each outlet channel part, and selecting the adaptive nozzle and mixing and expansion chamber structure data from a device geometric parameter table according to the real-time pressure so as to mount corresponding parts meeting structure conditions. The application working condition range of the device is remarkably widened, and the equipment maintenance and mounting cost is reduced.

Description

technical field [0001] The invention relates to the technical field of energy collection, in particular to a replaceable injection device. Background technique [0002] Natural gas injection technology can use the energy of high-pressure natural gas to reduce the wellhead pressure of low-pressure gas wells, increase the production of gas wells, and increase the transmission pressure of low-pressure natural gas to meet the requirements of gathering and transportation. The natural gas injection device is mainly composed of five parts: high-pressure gas inlet, low-pressure gas inlet, nozzle, mixing chamber, diffusion chamber (also called diffusion chamber). The ejector itself does not need additional power, has simple structure, low manufacturing cost, easy installation and convenient operation. In recent years, ejectors have been widely used in many engineering and scientific research equipment at home and abroad. [0003] The following problems often exist in the production...

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Problems solved by technology

[0003] The following problems often exist in the production process of existing natural gas fields: 1. In the process of gas field exploitation, the formation energy continues to decrease, and the pressure of the gas well decreases. 2. In the same gas field, high and low pressure wells exist at the same time, especially in the production of cluster wells, the pressure difference between wells is significant. The wells with too high pressure need to be throttled, and the wells with too low pressure need to be boosted, and the mixed transmission of high and low pressure gas wells is further aggravated Difficulty and cost of producing low-pressure wells

[0004] Injection technology is a technology that uses the energy of high-pressure gas wells to exploit low-pressure wells. This technology can delay the pressurized production time, significantly reduce production costs, and can effectively solve the problems of low-pressure production of gas wells and mixed transportation of gas produced by high-low pressure gas wells. However, traditional The structural size of the injection device is fixed, and the scope of applicable working conditions is limited

When designing the ejector, it is generally designed according to specific production conditions and pressure parameters, and the range of design conditions is narrow. Often, one ejector size is only suitable for limited production conditions and cannot be used in different natural gas wells. widely used

In addition, as the production progresses, the working conditions of the same natural gas well often change rapidly, so that the injection device designed according to the original design working conditions will soon become unsuitable

In such an application environment, if the working conditions change slightly, it is necessary to redesign and process a new injection device with other structural parameters. This will increase the cost of design, processing, and use, and also affect the sustainability of the production process.

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