阅读说明：本技术 三高油气井采出油气降温装置 (Temperature reducing device for oil gas produced by three-high oil gas well ) 是由 庞德新 贡军民 林森明 万喜军 陈云涛 王斌 周汉鹏 申玉壮 张晓彩 于 2020-06-05 设计创作，主要内容包括：本发明涉及采出油气降温装置技术领域,是一种三高油气井采出油气降温装置,其包括回水降温装置、三相分离器、高温高压油气管、冷水进水管、冷水回水管、至少一台高压冷却器和至少一台低压冷却器,每台高压冷却器的高温侧进口均与高温高压油气管连通,每台高压冷却器的高温侧出口均通过一次高温管线与三相分离器的进口连通。本发明结构合理而紧凑,使用方便,其通过对高温高压油气逐步降温,能满足三相分离器进油气温度要求,冷却降温后的原油满足拉运和存放要求,保证试油或采油系统及运输安全,有效控制罐区原油温度,降低气相中的轻烃挥发和天然气聚集程度,从而降低闪爆风险。(The invention relates to the technical field of produced oil gas cooling devices, in particular to a three-high oil gas well produced oil gas cooling device which comprises a return water cooling device, a three-phase separator, a high-temperature high-pressure oil gas pipe, a cold water inlet pipe, a cold water return pipe, at least one high-pressure cooler and at least one low-pressure cooler, wherein a high-temperature side inlet of each high-pressure cooler is communicated with the high-temperature high-pressure oil gas pipe, and a high-temperature side outlet of each high-pressure cooler is communicated with an inlet of the three-phase separator through a high-temperature pipeline. The oil-gas cooling device has a reasonable and compact structure, is convenient to use, can meet the oil inlet temperature requirement of the three-phase separator by gradually cooling high-temperature and high-pressure oil gas, ensures that the cooled crude oil meets the requirements of hauling and storage, ensures the safety of a test oil or oil extraction system and transportation, effectively controls the temperature of the crude oil in a tank area, and reduces the volatilization of light hydrocarbon and the aggregation degree of natural gas in the gas phase, thereby reducing the flash explosion risk.)

1. A three-high oil-gas well produced oil-gas cooling device is characterized by comprising a return water cooling device, three-phase separators, high-temperature high-pressure oil-gas pipes, cold water inlet pipes, cold water return pipes, at least one high-pressure cooler and at least one low-pressure cooler, wherein a high-temperature side inlet of each high-pressure cooler is communicated with the high-temperature high-pressure oil-gas pipes, a high-temperature side outlet of each high-pressure cooler is communicated with an inlet of the three-phase separators through a primary high-temperature pipeline, a liquid outlet of each three-phase separator is communicated with a high-temperature side inlet of each low-pressure cooler through a secondary high-temperature high-pressure pipeline, and a high-temperature side outlet of each low-pressure cooler is; the low-temperature side inlet of each low-pressure cooler and the low-temperature side inlet of each high-pressure cooler are communicated with the outlet of the cold water inlet pipe, the low-temperature side outlet of each low-pressure cooler and the low-temperature side outlet of each high-pressure cooler are communicated with the inlet of the cold water return pipe, and the outlet of the cold water return pipe is communicated with the inlet of the return water cooling device.

2. The device for reducing the temperature of produced oil and gas in the three-high oil and gas well according to claim 1, wherein the backwater cooling device comprises at least one air cooler and at least one backwater spray cooling tank, a water inlet of the air cooler is communicated with an outlet of the cold water return pipe, a water outlet of the air cooler is communicated with a water inlet of the backwater spray cooling tank, and a water outlet of the backwater spray cooling tank is communicated with an inlet of the cold water inlet pipe.

3. The device for reducing the temperature of the produced oil gas of the three-high oil-gas well according to claim 2, which is characterized by further comprising a water storage tower, wherein a water outlet of the return water spraying cooling tank is communicated with a water return port of the water storage tower, a water outlet of the water storage tower is communicated with an inlet of a cold water inlet pipe, and a water supplementing pipe is connected to the water storage tower; the two or more air coolers are connected in series or in parallel, and the two backwater spraying cooling tanks are connected in series or in parallel; a water distributor is arranged in the backwater spraying cooling tank, and the water inlet end of the water distributor is communicated with a cold water pipe.

4. The device for reducing the temperature of produced oil gas of the three-high oil-gas well according to claim 1, 2 or 3, characterized in that the high-temperature side inlet of each high-pressure cooler is respectively communicated with the high-temperature high-pressure oil gas pipe through a high-temperature high-pressure branch pipe, and a valve is respectively and fixedly arranged on each high-temperature high-pressure branch pipe; or/and the low-temperature side inlet of each low-pressure cooler and the low-temperature side inlet of each high-pressure cooler are respectively communicated with the outlet of the cold water inlet pipe through low-temperature water inlet branch pipes, and a valve and a flow measuring instrument are fixedly arranged on each low-temperature water inlet branch pipe; or/and the low-temperature side outlet of each low-pressure cooler and the low-temperature side outlet of each high-pressure cooler are respectively communicated with the inlet of the cold water return pipe through low-temperature return branch pipes, and a temperature measuring instrument is fixedly mounted on each low-temperature return branch pipe.

5. The device for reducing the temperature of produced oil gas in the three-high oil-gas well according to claim 1, 2 or 3, which is characterized by further comprising a water inlet pressure monitoring manifold connected in series with the cold water inlet pipe, wherein the water inlet pressure monitoring manifold comprises at least one water inlet pressure monitoring branch pipe, the water inlet pressure monitoring branch pipes are connected in parallel, and each water inlet pressure monitoring branch pipe is fixedly provided with a pressure measuring instrument.

6. The device for reducing the temperature of produced oil and gas in the three-high oil and gas well according to claim 4, further comprising a water inlet pressure monitoring manifold connected in series with the cold water inlet pipe, wherein the water inlet pressure monitoring manifold comprises at least one water inlet pressure monitoring branch pipe, the water inlet pressure monitoring branch pipes are connected in parallel, and each water inlet pressure monitoring branch pipe is fixedly provided with a pressure measuring instrument.

7. The device for reducing the temperature of the produced oil gas of the three-high oil-gas well according to the claim 1, 2 or 3, characterized by further comprising a return water pressure monitoring manifold connected in series with the cold water return pipe, wherein the return water pressure monitoring manifold comprises at least one return water pressure monitoring branch pipe, the return water pressure monitoring branch pipes are connected in parallel, and a pressure measuring instrument is fixedly installed on each return water pressure monitoring branch pipe.

8. The device for reducing the temperature of produced oil and gas of the three-high oil and gas well according to claim 4, further comprising a return water pressure monitoring manifold connected in series with the cold water return pipe, wherein the return water pressure monitoring manifold comprises at least one return water pressure monitoring branch pipe, the return water pressure monitoring branch pipes are connected in parallel, and a pressure measuring instrument is fixedly installed on each return water pressure monitoring branch pipe.

9. The device for reducing the temperature of produced oil and gas of the three-high oil and gas well according to claim 5, further comprising a return water pressure monitoring manifold connected in series with the cold water return pipe, wherein the return water pressure monitoring manifold comprises at least one return water pressure monitoring branch pipe, the return water pressure monitoring branch pipes are connected in parallel, and a pressure measuring instrument is fixedly installed on each return water pressure monitoring branch pipe.

10. The device for reducing the temperature of produced oil and gas of the three-high oil and gas well according to claim 6, further comprising a return water pressure monitoring manifold connected in series with the cold water return pipe, wherein the return water pressure monitoring manifold comprises at least one return water pressure monitoring branch pipe, the return water pressure monitoring branch pipes are connected in parallel, and a pressure measuring instrument is fixedly installed on each return water pressure monitoring branch pipe.

Technical Field

The invention relates to the technical field of produced oil gas cooling devices, in particular to a produced oil gas cooling device for a three-high oil gas well.

Background

The oil gas produced by the oil gas exploitation of the three-high well (high temperature, high pressure and high yield) has the characteristics of high temperature and high pressure, when the high-temperature and high-pressure oil gas is directly sent to a three-phase separator for treatment without cooling, the requirement of the temperature of the inlet oil of the three-phase separator is not met, the damage speed of the three-phase separator is accelerated after long-term operation, the service life of the three-phase separator is reduced, meanwhile, the high-temperature crude oil obtained by three-phase separation is not beneficial to the transportation and storage of the crude oil, and light hydrocarbon components in the gas phase obtained by three-phase separation are volatile under the high-temperature condition and are aggregated with.

Disclosure of Invention

The invention provides an oil gas cooling device for three-high oil-gas well production, which overcomes the defects of the prior art, can meet the oil inlet temperature requirement of a three-phase separator and the requirements of crude oil transportation and storage by gradually cooling high-temperature and high-pressure oil gas and then carrying out three-phase separation treatment, ensures the safety of a test oil or oil production system and transportation, effectively controls the crude oil temperature of a tank area, and reduces the light hydrocarbon volatilization and natural gas aggregation degree in gas phase, thereby reducing the flash explosion risk.

The technical scheme of the invention is realized by the following measures: a three-high oil-gas well produced oil-gas cooling device comprises a return water cooling device, three-phase separators, high-temperature high-pressure oil-gas pipes, cold water inlet pipes, cold water return pipes, at least one high-pressure cooler and at least one low-pressure cooler, wherein a high-temperature side inlet of each high-pressure cooler is communicated with the high-temperature high-pressure oil-gas pipes, a high-temperature side outlet of each high-pressure cooler is communicated with an inlet of the three-phase separator through a primary high-temperature pipeline, a liquid outlet of each three-phase separator is communicated with a high-temperature side inlet of each low-pressure cooler through a secondary high-temperature high-pressure line, and a high-temperature side outlet of each low-pressure cooler is; the low-temperature side inlet of each low-pressure cooler and the low-temperature side inlet of each high-pressure cooler are communicated with the outlet of the cold water inlet pipe, the low-temperature side outlet of each low-pressure cooler and the low-temperature side outlet of each high-pressure cooler are communicated with the inlet of the cold water return pipe, and the outlet of the cold water return pipe is communicated with the inlet of the return water cooling device.

The following is further optimization or/and improvement of the technical scheme of the invention:

the backwater cooling device comprises at least one air cooler and at least one backwater spraying cooling tank, wherein a water inlet of the air cooler is communicated with an outlet of a cold water backwater pipe, a water outlet of the air cooler is communicated with a water inlet of the backwater spraying cooling tank, and a water outlet of the backwater spraying cooling tank is communicated with an inlet of a cold water inlet pipe.

The water storage tower is further included, a water outlet of the backwater spraying cooling tank is communicated with a backwater port of the water storage tower, a water outlet of the water storage tower is communicated with an inlet of the cold water inlet pipe, and a water replenishing pipe is connected to the water storage tower; the two or more air coolers are connected in series or in parallel, and the two backwater spraying cooling tanks are connected in series or in parallel; a water distributor is arranged in the backwater spraying cooling tank, and the water inlet end of the water distributor is communicated with a cold water pipe.

The high-temperature side inlet of each high-pressure cooler is communicated with a high-temperature high-pressure oil-gas pipe through a high-temperature high-pressure branch pipe, and a valve is fixedly mounted on each high-temperature high-pressure branch pipe; the low-temperature side inlet of each low-pressure cooler and the low-temperature side inlet of each high-pressure cooler are respectively communicated with the outlet of the cold water inlet pipe through low-temperature water inlet branch pipes, and a valve and a flow measuring instrument are fixedly mounted on each low-temperature water inlet branch pipe; the low-temperature side outlet of each low-pressure cooler and the low-temperature side outlet of each high-pressure cooler are respectively communicated with the inlet of the cold water return pipe through low-temperature return branch pipes, and a temperature measuring instrument is fixedly mounted on each low-temperature return branch pipe.

The pressure monitoring manifold that intakes still connects in series in the cold water inlet tube, the pressure monitoring manifold that intakes includes at least one pressure monitoring branch pipe of intaking, and it is parallelly connected each other between the pressure monitoring branch pipe to intake, and equal fixed mounting has pressure measurement instrument on every pressure monitoring branch pipe of intaking.

The water-cooling water pressure monitoring system further comprises a water return pressure monitoring manifold connected in series with the cold water return pipe, the water return pressure monitoring manifold comprises at least one water return pressure monitoring branch pipe, the water return pressure monitoring branch pipes are connected in parallel, and a pressure measuring instrument is fixedly mounted on each water return pressure monitoring branch pipe.

The oil-gas cooling device has a reasonable and compact structure, is convenient to use, can meet the oil inlet temperature requirement of the three-phase separator by gradually cooling high-temperature and high-pressure oil gas, ensures that the cooled crude oil meets the requirements of hauling and storage, ensures the safety of a test oil or oil extraction system and transportation, effectively controls the temperature of the crude oil in a tank area, and reduces the volatilization of light hydrocarbon and the aggregation degree of natural gas in the gas phase, thereby reducing the flash explosion risk.

Drawings

FIG. 1 is a schematic process flow diagram of the preferred embodiment of the present invention.

The codes in the figures are respectively: the device comprises a three-phase separator 1, a high-temperature high-pressure oil-gas pipe 2, a cold water inlet pipe 3, a cold water return pipe 4, a high-pressure cooler 5, a low-pressure cooler 6, a primary high-temperature pipeline 7, a secondary high-temperature high-line 8, a low-temperature crude oil pipeline 9, an air cooler 10, a return water spraying cooling tank 11, a water storage tower 12, a water replenishing pipe 13, a water distributor 14, a cold water pipe 15, a high-temperature high-pressure branch pipe 16, a low-temperature water inlet branch pipe 17, a flow measuring instrument 18, a low-temperature return water branch pipe 19, a temperature measuring instrument 20, a water inlet pressure monitoring branch pipe 21, a pressure measuring instrument 22 and a return water pressure monitoring branch pipe 23.

Detailed Description

The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.

In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.

The invention is further described with reference to the following examples and figures:

as shown in the attached figure 1, the oil-gas production cooling device for the three-high oil-gas well comprises a return water cooling device, three-phase separators 1, high-temperature high-pressure oil-gas pipes 2, cold water inlet pipes 3, cold water return pipes 4, at least one high-pressure cooler 5 and at least one low-pressure cooler 6, wherein a high-temperature side inlet of each high-pressure cooler 5 is communicated with the high-temperature high-pressure oil-gas pipes 2, a high-temperature side outlet of each high-pressure cooler 5 is communicated with an inlet of the three-phase separator 1 through a primary high-temperature pipeline 7, a liquid outlet of each three-phase separator 1 is communicated with a high-temperature side inlet of each low-pressure cooler 6 through a secondary high-temperature high-pressure line 8, and a high-temperature side outlet of each; the low-temperature side inlet of each low-pressure cooler 6 and the low-temperature side inlet of each high-pressure cooler 5 are communicated with the outlet of the cold water inlet pipe 3, the low-temperature side outlet of each low-pressure cooler 6 and the low-temperature side outlet of each high-pressure cooler 5 are communicated with the inlet of the cold water return pipe 4, and the outlet of the cold water return pipe 4 is communicated with the inlet of the return water cooling device.

High-temperature oil gas enters a high-pressure cooler 5 through a high-pressure manifold and a high-temperature high-pressure oil gas pipe 2 in sequence, after heat exchange with water, cooled low-temperature crude oil enters a three-phase separator 1, crude oil obtained by the three-phase separator 1 enters a low-pressure cooler 6 to be further cooled, and the cooled crude oil enters a crude oil storage tank through the low-pressure cooler 6. Meanwhile, cooling water enters the high-pressure cooler 5 and the low-pressure cooler 6 through the cold water inlet pipe 3 to cool crude oil, high-temperature return water is sent to a return water cooling device through the cold water return pipe 4 to be cooled after the temperature of the cooling water rises, and the cooled return water is recycled and supplied to the high-pressure cooler 5 and the low-pressure cooler 6.

From above, this device can satisfy 1 oil feed temperature requirement of three-phase separator through progressively cooling down high temperature high pressure oil gas, and crude oil after the cooling down satisfies the roping and deposits the requirement, guarantees test oil or oil recovery system and transportation safety, and the crude oil temperature in effective control tank field reduces the light hydrocarbon in the gas phase and volatilizees and the natural gas gathering degree to reduce the risk of exploding of sudden strain of a muscle.

The oil gas cooling device produced by the three-high oil gas well can be further optimized or/and improved according to actual needs:

as shown in the attached figure 1, the backwater cooling device comprises at least one air cooler 10 and at least one backwater spray cooling tank 11, a water inlet of the air cooler 10 is communicated with an outlet of a cold water return pipe 4, a water outlet of the air cooler 10 is communicated with a water inlet of the backwater spray cooling tank 11, and a water outlet of the backwater spray cooling tank 11 is communicated with an inlet of a cold water inlet pipe 3.

The water is primarily cooled through the air cooler 10, the backwater is further cooled through the backwater spraying and cooling tank 11, and the backwater after being cooled is recycled and supplied to the high-pressure cooler 5 and the low-pressure cooler 6.

As shown in the attached figure 1, the device also comprises a water storage tower 12, wherein a water outlet of a return water spraying cooling tank 11 is communicated with a water return port of the water storage tower 12, a water outlet of the water storage tower 12 is communicated with an inlet of a cold water inlet pipe 3, and a water replenishing pipe 13 is connected to the water storage tower 12; more than two air coolers 10 are connected in series or in parallel, and two return water spraying cooling tanks 11 are connected in series or in parallel; a water distributor 14 is arranged in the backwater spraying cooling tank 11, and the water inlet end of the water distributor 14 is communicated with a cold water pipe 15.

Cold water is fed into the backwater spraying cooling tank 11 through a cold water pipe 15, and is fully mixed with the backwater in the backwater spraying cooling tank 11 through a water distributor 14 to be cooled.

As shown in the attached figure 1, the high-temperature side inlet of each high-pressure cooler 5 is respectively communicated with a high-temperature high-pressure oil-gas pipe 2 through a high-temperature high-pressure branch pipe 16, and a valve is respectively and fixedly arranged on each high-temperature high-pressure branch pipe 16; the low-temperature side inlet of each low-pressure cooler 6 and the low-temperature side inlet of each high-pressure cooler 5 are respectively communicated with the outlet of the cold water inlet pipe 3 through a low-temperature water inlet branch pipe 17, and a valve and a flow measuring instrument 18 are fixedly arranged on each low-temperature water inlet branch pipe 17; the low-temperature side outlet of each low-pressure cooler 6 and the low-temperature side outlet of each high-pressure cooler 5 are respectively communicated with the inlet of the cold water return pipe 4 through a low-temperature return branch pipe 19, and a temperature measuring instrument 20 is fixedly mounted on each low-temperature return branch pipe 19.

During operation, the opening of the valve is adjusted according to the outlet temperature and the return water temperature of oil gas or crude oil, the recorded water quantity is observed through the flowmeter, and when the outlet temperature or the return water temperature of the oil gas or the crude oil exceeds the designed temperature, the opening of the valve is increased, and the water quantity is increased.

The flow meter 18 may employ a flow meter. The temperature measuring instrument 20 may employ a thermometer.

As shown in the attached figure 1, the device also comprises a water inlet pressure monitoring manifold connected in series with the cold water inlet pipe 3, the water inlet pressure monitoring manifold comprises at least one water inlet pressure monitoring branch pipe 21, the water inlet pressure monitoring branch pipes 21 are connected in parallel, and each water inlet pressure monitoring branch pipe 21 is fixedly provided with a pressure measuring instrument 22.

As shown in the attached figure 1, the system also comprises a return water pressure monitoring manifold connected in series with the cold water return pipe 4, the return water pressure monitoring manifold comprises at least one return water pressure monitoring branch pipe 23, the return water pressure monitoring branch pipes 23 are connected in parallel, and each return water pressure monitoring branch pipe 23 is fixedly provided with a pressure measuring instrument 22.

The pressure measuring instrument 22 may be a pressure gauge.

According to actual operation requirements, as shown in fig. 1, the above-described pipelines are provided with corresponding branch pipes, pumps, valves, flow meters, thermometers, level meters, and the like.

When the water storage device is used, liquid level meters can be arranged on the water tank and the water storage tower 12 at the lower parts of the high-pressure cooler 5 and the low-pressure cooler 6, and the water pump in the pipeline is started and stopped according to the liquid levels of the high-pressure cooler and the low-pressure cooler to control the liquid levels.

The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.

The use process of the best embodiment of the invention is as follows: cold water (about 35 ℃) in a water storage tower 12 is sent into a high-pressure cooler 5 and a low-pressure cooler 6 through a cold water inlet pipe 3 to cool crude oil, the temperature of the cooling water rises (about 70 ℃), high-temperature return water is sent back to an air cooler 10 through a cold water return pipe 4 to carry out primary cooling on the water, the water is further cooled through two return water spraying cooling tanks 11 in sequence, and finally the water is sent into the water storage tower 12 to be recycled and supplied to the high-pressure cooler 5 and the low-pressure cooler 6.

In the heat exchange process, the temperature change condition of the high-temperature oil gas is as follows: high-temperature oil gas produced by a wellhead sequentially passes through a high-pressure manifold and a high-temperature high-pressure oil gas pipe 2, then enters a high-pressure cooler 5 at a temperature of about 120 ℃, exchanges heat with water, then enters a three-phase separator 1 at a temperature of about 90 ℃, crude oil at the outlet of the three-phase separator 1 enters a low-pressure cooler 6, the crude oil is further cooled, and the cooled oil gas (about 60 ℃) enters a crude oil storage tank from the low-pressure cooler 6.