Multistage micro-injection device

An injection device and a micro-quantity technology, applied in the direction of surface tension analysis, etc., can solve problems such as the inability to accurately control the amount of liquid injection, and achieve the effect of improving measurement accuracy

Active Publication Date: 2015-01-21
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problem in the prior art that it is impossible to accurately control the amount of liquid injection to form ideal hanging drops, the present invention provides a multi-stage micro-injection device, which replaces the original piston-push injection method Change to the injection method of screw rotation to push the liquid, so that the liquid can be accurately injected into the hanging drop, and the hanging drop of the ideal size can be obtained

Method used

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Embodiment 1

[0025] The multi-stage micro-injection device of the present invention will be described in detail below with reference to the accompanying drawings. A multi-stage micro-injection device 10, comprising an outer hanging dropper 1, a first-stage threaded cavity piston tube 2, and a solid threaded piston 4, which are sequentially socketed from the outside to the inside; the outer hanging dropper 1 is in the shape of a cylinder with one end closed, The inside of the externally suspended dropper 1 is a first cavity 11, and the closed end of the externally suspended dropper 1 is provided with a first-level injection port 12; the first-level threaded cavity piston tube 2 is cylindrical with one end closed, and the first-level thread The closed end of the hollow piston tube 2 is set in the outer hanging dropper 1, the open end of the first-stage threaded cavity piston tube 2 is set outside the outer hanging dropper 1, and the inside of the first-stage threaded cavity piston tube 2 is t...

Embodiment 2

[0031]This embodiment is an improvement on Embodiment 1, thus including all the technical features of Embodiment 1. The multi-stage micro-injection device 10 in this embodiment not only includes an externally suspended dropper 1, a first-stage threaded cavity piston tube 2, and a solid threaded piston 4 that are sequentially socketed from outside to inside; The first-stage threaded cavity piston tubes 2 are socketed through the second-stage threaded cavity piston tube 3; the second-stage threaded cavity piston tube 3 is cylindrical with one end closed, and the closed end of the second-stage threaded cavity piston tube 3 is set outside In the hanging dropper 1, the open end of the secondary threaded cavity piston tube 3 is arranged outside the external hanging dropper 1, the inside of the secondary threaded cavity piston tube 3 is a third cavity 31, and the secondary threaded cavity piston tube 3 The closed end of the closed end is provided with a third-level injection port 32,...

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Abstract

The invention discloses a multistage micro-injection device which at least comprises an outer suspension dropper (1), a primary threaded cavity piston tube (2), and a solid threaded piston (4). The outer peripheral wall of the primary threaded cavity piston tube (2) and the inner peripheral wall of the outer suspension dropper (1) are hermetically connected through threads. The multistage micro-injection device adopts injection way of pushing liquid by thread rotation, liquid can be accurately injected into the dropper, and drops in ideal size can be obtained. Besides, the multistage micro-injection device is simple and convenient to operate and high in efficiency.

Description

technical field [0001] The invention relates to the technical field of interfacial tension testing, in particular to a multi-stage micro-injection device for interfacial tension testing in high-pressure physical property experiments of enhanced oil recovery. Background technique [0002] In recent years, international attention to CO 2 The call for emission reduction continues to increase, and various CO 2 Storage and utilization methods continue to emerge, and the more effective method is CO 2 Oil displacement and storage technology. This method has been applied in domestic Jiangsu oilfields and Jilin oilfields and has achieved remarkable results. With the continuous application of this technology, the migration mechanism of the oil-gas interface front has become the focus of many researchers, and the oil-gas interfacial tension test is the most important means to study this mechanism. [0003] Measuring oil-gas interfacial tension value helps to analyze CO 2 - The con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/02
Inventor 张可马德胜秦积舜李实陈兴隆廉黎明
Owner PETROCHINA CO LTD
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