Defoaming on-line monitoring device

Abstract

The utility model relates to the technical field of water drainage and gas recovery in gas well production, in particular to a defoaming online monitoring device which comprises a foam height induction detector, a liquid storage tank, a controller, a bubbler and a three-phase separator, a liquid conveying pipeline is communicated between a defoaming agent tank and the three-phase separator, a monitoring liquid inlet pipeline is communicated between the liquid conveying pipeline and the liquid storage tank, and a monitoring liquid outlet pipeline is communicated between the controller and the bubbler. The liquid storage tank is fixedly communicated with a monitoring liquid drainage pipeline, the liquid storage tank is provided with a foam height induction detector, an inverted U-shaped gas conveying pipeline is fixedly communicated between the liquid storage tank and the bubbler, and the foam height induction detector and the bubbler are electrically connected with the controller. The device is reasonable and compact in structure, convenient to use, low in operation cost and accurate and efficient in data acquisition, reduces errors caused by later manual operation, eliminates potential safety hazards caused by bubbles, equipment damage and other influences which are not beneficial to production by adjusting the adding amount of the defoaming agent in time, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of gas drainage and gas production in gas well production, and is an anti-foaming on-line monitoring device. Background Technique

[0002] Gas drainage and gas production is a common gas production process in the production of closed water drive gas reservoirs. Due to the influence of formation water and condensate water in natural gas, liquid accumulation often occurs in the gas well borehole, which will have a relatively large impact on the production efficiency of the gas well. On the basis of many years of development practice at home and abroad, relatively common gas drainage and gas production processes have gradually formed, including "optimized pipe string, gas lift drainage, foam drainage, conventional rod pump drainage", etc.

[0003] Foam drainage is achieved by adding a surfactant (foaming agent) or a solid foaming rod that can form bubbles when encountering water into the well. After mixing with water, with the agitation of the natural gas flow, low-density water-containing foam is generated and carried to the ground with the gas flow, thereby achieving the purpose of drainage.

[0004] The water-containing foam carried to the ground needs to be defoamed, otherwise it will affect the subsequent work. In severe cases, it may cause the compressor to shut down, resulting in safety accidents and a reduction in production.

[0005] At present, artificial sampling is used to observe the defoaming time. There are many human factors, and the sampling times are limited. The effect verification is delayed, and the dosage of the defoaming agent cannot be effectively adjusted. Summary of the Invention

[0006] The utility model provides an anti-foaming on-line monitoring device, which overcomes the deficiencies of the above-mentioned prior art, and can effectively solve the problems of potential safety hazards and equipment damage caused by bubbles and errors easily brought by manual operation when adding the existing defoaming agent.

[0007] The technical solution of the utility model is realized by the following measures: an anti-foaming on-line monitoring device, including a foam height induction detector, a liquid storage tank, a controller, a bubbler and a three-phase separator. The liquid inlet of the three-phase separator is fixedly connected with an infusion pipeline. A monitoring liquid inlet pipeline is fixedly connected between the infusion pipeline and the lower liquid inlet of the liquid storage tank. The bottom liquid outlet of the liquid storage tank is fixedly connected with a monitoring liquid discharge pipeline. A foam height induction detector is arranged on the upper part of the liquid storage tank. An inverted U-shaped gas pipeline is fixedly connected between the upper part of the liquid storage tank and the liquid inlet of the bubbler. The foam height induction detector and the bubbler are both electrically connected to the controller.

[0008] The following is a further optimization and / or improvement of the above-mentioned technical solution of the utility model:

[0009] The inlet of the above-mentioned inverted U-shaped gas pipeline extends into the lower part of the liquid storage tank.

[0010] A first electromagnetic valve is fixedly installed on the monitoring liquid inlet pipeline between the above-mentioned infusion pipeline and the foam height induction detection, and a second electromagnetic valve is fixedly installed on the monitoring liquid discharge pipeline.

[0011] Both the above-mentioned first electromagnetic valve and the second electromagnetic valve are electrically connected to the controller.

[0012] The structure of the utility model is reasonable and compact, easy to use, with low operating cost, accurate and efficient data acquisition, reducing the errors caused by later manual operations, and eliminating the adverse effects on production such as potential safety hazards and equipment damage caused by bubbles by timely adjusting the addition amount of the defoaming agent, and has the characteristics of safety, labor saving, simplicity and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 is a schematic process flow diagram of the utility model.

[0014] Attached Figure 1 The codes in are respectively: 1 is the foam height induction detector, 2 is the liquid storage tank, 3 is the controller, 4 is the bubbler, 5 is the three-phase separator, 6 is the infusion pipeline, 7 is the monitoring liquid inlet pipeline, 8 is the monitoring liquid discharge pipeline, 9 is the inverted U-shaped gas transmission pipeline, 10 is the first electromagnetic valve, and 11 is the second electromagnetic valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The utility model is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solutions of the utility model and the actual situation.

[0016] In the utility model, unless otherwise specified, the equipment and devices used are the existing well-known and commonly used equipment and devices in the art. For example, the foam height induction detector 1 and the bubbler 4 can both be existing well-known and commonly used devices.

[0017] In the utility model, for the convenience of description, the description of the relative position relationship of each component is carried out according to the layout mode of the attached Figure 1 drawing of the specification. For example, the positional relationships such as front, back, up, down, left, and right are determined according to the layout direction of the attached Figure 1 drawing of the specification.

[0018] The following further describes the utility model in conjunction with the embodiments and the drawings:

[0019] Embodiment 1: As shown in the attached Figure 1As shown in the figure, the on-line defoaming monitoring device includes a foam height induction detector 1, a liquid storage tank 2, a controller 3, a bubbler 4 and a three-phase separator 5. The liquid inlet of the three-phase separator 5 is fixedly connected to an infusion pipeline 6. A monitoring liquid inlet pipeline 7 is fixedly connected between the infusion pipeline 6 and the lower liquid inlet of the liquid storage tank 2. The bottom liquid outlet of the liquid storage tank 2 is fixedly connected to a monitoring liquid drainage pipeline 8. The foam height induction detector 1 is arranged on the upper part of the liquid storage tank 2. An inverted U-shaped gas transmission pipeline 9 is fixedly connected between the upper part of the liquid storage tank 2 and the liquid inlet of the bubbler 4. The foam height induction detector 1 and the bubbler 4 are both electrically connected to the controller 3.

[0020] As required, in the present utility model, the foam height induction detector 1 can use one or more probes to monitor the foam height of the defoamer. The probe can be a laser sensor (which can be an IP67 sensor), an infrared sensor, an ultrasonic sensor, a microwave sensor, a conductivity sensor, etc.

[0021] Among them, the main function of the bubbler 4 (which can be an oxygen pump in a conventional fish tank) is to aerate and foam the taken-out liquid; the defoaming effect can be measured by the foam height induction detector 1 by measuring the time when the foam height drops to the water liquid level.

[0022] According to actual needs, the above on-line defoaming monitoring device can be further optimized and / or improved:

[0023] Embodiment 2: The difference from Embodiment 1 is that as shown in the appendix Figure 1 As shown, the inlet of the inverted U-shaped gas transmission pipeline 9 extends into the lower part of the liquid storage tank 2.

[0024] Embodiment 3: The difference from Embodiments 1 to 2 is that as shown in the appendix Figure 1 As shown, a first solenoid valve 10 is fixedly installed on the monitoring liquid inlet pipeline 7 between the infusion pipeline 6 and the liquid storage tank 2, and a second solenoid valve 11 is fixedly installed on the monitoring liquid drainage pipeline 8.

[0025] Embodiment 4: The difference from Embodiments 1 to 3 is that as shown in the appendix Figure 1 As shown, both the first solenoid valve 10 and the second solenoid valve 11 are electrically connected to the controller 3.

[0026] As required, on each pipeline and equipment of the on-line defoaming monitoring device, conventional valves, thermometers, pressure gauges, etc. well-known and commonly used in the art can also be set according to production needs.

[0027] The controller 3 can adopt a DCS controller. The model of the DCS controller 3 can be the CS3000 controller 3 produced by Yokogawa Corporation of Japan. It can measure multiple groups of data every day, ensure the defoaming effect, and timely adjust the dosing amount.

[0028] As needed, the DCS controller 3 is not only interlocked with the foam height induction detector 1, the bubbler 4, the first solenoid valve 10 and the second solenoid valve 11, but also interlocked with the defoamer addition pump in the upstream process and the regulating valve after the defoamer addition pump. It can automatically adjust the addition amount of the defoamer in the oil in a timely manner according to the defoaming effect detected by the foam height induction detector 1, and accurately use the chemical agent.

[0029] This device has the characteristics of simple structure, low operating cost, timely response of defoaming effect, and data support for the effect. Since this device is installed after the addition of the defoamer and before reaching the three-phase separator 5, it reduces the impact of later work, timely adjusts the addition amount of the defoamer, and eliminates the adverse effects on production such as potential safety hazards and equipment damage caused by bubbles.

[0030] The above technical features constitute an embodiment of the present utility model, which has strong adaptability and implementation effects. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

[0031] The usage process of the embodiment of the present utility model:

[0032] First, when the oil after adding the defoamer is transported to the three-phase separator 5 through the liquid delivery pipeline 6, a part of the oil enters the liquid storage tank 2 through the monitoring liquid inlet pipeline 7.

[0033] Then, turn on the bubbler 4. The gas in the bubbler 4 enters the lower part of the oil in the liquid storage tank 2 through the inverted U-shaped gas transmission pipeline 9 and starts bubbling for a set time.

[0034] Next, the foam height induction detector 1 records and collects the highest time to the lowest time of defoaming to determine the detected defoaming effect.

[0035] Finally, the controller 3 automatically adjusts the addition amount of the upstream defoamer in a timely manner according to the detected defoaming effect.

Claims

1. A defoaming online monitoring device, characterized in that It includes a foam height sensing detector, a liquid storage tank, a controller, a bubbler and a three-phase separator. The liquid inlet of the three-phase separator is fixedly connected with an infusion pipeline, the infusion pipeline and the liquid inlet at the lower part of the liquid storage tank are fixedly connected with a monitoring liquid inlet pipeline, the liquid outlet at the bottom of the liquid storage tank is fixedly connected with a monitoring liquid discharge pipeline, a foam height sensing detector is arranged on the upper part of the liquid storage tank, an inverted U-shaped gas transmission pipeline is fixedly connected between the upper part of the liquid storage tank and the liquid inlet of the bubbler, and the foam height sensing detector and the bubbler are electrically connected to the controller.

2. The defoaming online monitoring device according to claim 1, characterized in that The inverted U-shaped gas transmission pipeline inlet extends into the lower part of the liquid storage tank.

3. The defoaming online monitoring device according to claim 1 or 2, characterized in that A first solenoid valve is fixedly installed on the monitoring liquid inlet pipeline between the infusion pipeline and the foam height sensing detection, and a second solenoid valve is fixedly installed on the monitoring liquid discharge pipeline.

4. The defoaming online monitoring device according to claim 3 is characterized in that The first solenoid valve and the second solenoid valve are both electrically connected to the controller.

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