阅读说明：本技术 补液式油气混输装置 (Fluid infusion type oil-gas mixed transportation device ) 是由 李波 邹纯超 王磊 代莉剑 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种补液式油气混输装置,涉及油气输送技术领域,解决现有油气混输装置在高含气率工况下出现段塞流,混输泵容易出现故障的问题,采用的技术方案是：补液式油气混输装置,包括混输泵,混输泵的入口端和出口端分别连接混输进入管和混输排出管,混输排出管连接三通,三通的一个支管设置阀门并连接混输排出总管、另一个支管设置阀门并连接气液分离器,气液分离器的气体出口设置阀门并连接混输排出总管、液体出口设置阀门并连接混输排出总管,液体出口还通过第一补液管与混输泵的入口端相连。混输泵设置冷却结构。补液式油气混输装置还包括补液罐,补液罐通过第二补液管与混输泵入口端相连。本发明适用于高含气率工况的油气混输。(The invention discloses a fluid infusion type oil-gas mixed transportation device, relates to the technical field of oil-gas transportation, and solves the problems that the existing oil-gas mixed transportation device has slug flow under the working condition of high gas content and a mixed transportation pump is easy to break down, and the adopted technical scheme is as follows: fluid infusion formula oil gas misconvergence device, including the misconvergence pump, the entry end and the exit end of misconvergence pump are connected the misconvergence admission pipe respectively and are defeated the discharge pipe in a mixed way, the tee bend is connected to the misconvergence discharge pipe, a tee bend branch pipe sets up the valve and connects the mixed output house steward, another branch pipe sets up the valve and connects vapour and liquid separator, vapour and liquid separator's gas outlet sets up the valve and connects the mixed output house steward, the liquid outlet still links to each other through. The mixing and conveying pump is provided with a cooling structure. The liquid supplementing type oil-gas mixed transportation device further comprises a liquid supplementing tank, and the liquid supplementing tank is connected with the inlet end of the mixed transportation pump through a second liquid supplementing pipe. The invention is suitable for oil-gas mixed transportation under the working condition of high gas content.)

1. Fluid infusion formula oil gas defeated device thoughtlessly, including defeated pump (1), defeated admission pipe (2) are thoughtlessly connected to the entry end of defeated pump (1), and defeated discharge pipe (3) are thoughtlessly connected to the exit end of defeated pump (1), and defeated discharge pipe (3) are thoughtlessly connected the tee bend, and tee bend branch pipe sets up the valve and connects defeated discharge header pipe (4) of thoughtlessly, its characterized in that: another branch pipe of tee bend sets up the valve and connects vapour and liquid separator (5), and the gas outlet of vapour and liquid separator (5) sets up the valve and connects and thoughtlessly exports main discharge pipe (4), and the liquid outlet of vapour and liquid separator (5) sets up the valve and connects thoughtlessly exports main discharge pipe (4), and the liquid outlet of vapour and liquid separator (5) still links to each other through the entry end of first fluid infusion pipe (6) with thoughtlessly defeated pump (1), sets up the valve on first fluid infusion pipe (6).

2. The fluid-supplementing oil-gas mixture transportation device according to claim 1, characterized in that: the first liquid supplementing pipe (6) is provided with a first cooler (7).

3. The hydraulic supply type oil-gas mixture transportation device according to claim 2, characterized in that: the first liquid supplementing pipe (6) is sequentially provided with a valve, a first cooler (7), a thermometer, a flowmeter (8) and a valve from a liquid inlet end to a liquid outlet end.

4. The fluid-supplementing oil-gas mixture transportation device according to claim 1, characterized in that: the liquid supplementing device is characterized by further comprising a liquid supplementing tank (9), wherein the liquid supplementing tank (9) is connected with the inlet end of the mixed transportation pump (1) through a second liquid supplementing pipe (10), a first pipeline pump (11) and a valve are arranged on the second liquid supplementing pipe (10), and the liquid inlet end of the first pipeline pump (11) is connected with the liquid supplementing tank (9).

5. The hydraulic supply type oil-gas mixture transportation device according to claim 4, characterized in that: still set up first check valve (12) on second fluid infusion pipe (10), vapour and liquid separator (5) and fluid infusion jar (9) set up in the fluid infusion sled.

6. A liquid supplementing type oil-gas mixing transportation device according to any one of claims 1 to 5, characterized in that: the mixing and conveying pump (1) is provided with a cooling structure.

7. The hydraulic infusion type oil-gas mixture transportation device according to claim 6, characterized in that: the cooling structure is as follows: the mixed transportation pump (1) is provided with a pump body interlayer, the pump body interlayer is provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are provided with a cooling pipeline (13), and the cooling pipeline (13) is sequentially provided with a valve, a cooling medium box (14), a second pipeline pump (15), a second cooler (16) and a filter (17) from the liquid outlet to the liquid inlet.

8. A liquid supplementing type oil-gas mixing transportation device according to any one of claims 1 to 5, characterized in that: the top of the gas-liquid separator (5) is provided with a first safety valve (18), the bottom of the gas-liquid separator is provided with an emptying valve (19), and the gas-liquid separator (5) is also provided with a temperature detector.

9. A liquid supplementing type oil-gas mixing transportation device according to any one of claims 1 to 5, characterized in that: set up bypass pipe (20) between the entry end of defeated pump (1) of mixing and exit end, set up second relief valve (21) on bypass pipe (20), the entry end and the exit end of second relief valve (21) set up the valve respectively, set up connecting pipe (22) between the entry end of the valve of second relief valve (21) entry end and defeated pump (1) exit end of mixing, set up the valve on connecting pipe (22).

10. A liquid supplementing type oil-gas mixing transportation device according to any one of claims 1 to 5, characterized in that: the mixed transportation inlet pipe (2) is provided with a valve and a filtering device (23), and the mixed transportation discharge pipe (3) is provided with a second check valve (24).

Technical Field

The invention relates to the technical field of oil-gas conveying, in particular to a fluid-supplementing type oil-gas mixed conveying device and method.

Background

The western oil field is represented by the Changqing oil field (the first oil field in China) and the Tarim oil and gas field (the third oil and gas field in China). The western natural gas yield far exceeds that of crude oil, and the crude oil is used as a starting point of the western gas and east gas transmission and becomes an important clean energy source for China.

Oil gas of a plurality of production single wells is gathered and then enters an external transportation station, and then is transported to a large-scale treatment station to be treated. The traditional conveying mode is as follows: oil gas is separated, the separated gas is conveyed to a treatment station through a compressor for dehydration and desulfurization, and the separated oil-water mixture is conveyed by a pumping or automobile conveying mode or conveyed to the treatment station for dehydration and desanding treatment. Two oil and gas conveying pipelines are required to be respectively built in the traditional treatment mode, a large separator, a heating device (such as a heating furnace), a compressor, an outward conveying pump and the like are arranged at the same time, the investment is large, the production management cost is increased particularly in the production areas of loess plateau, Tarim basin and desert, and the requirements of the current international situation and the quality and efficiency improvement are not met.

Currently, the emerging delivery methods are: the produced oil gas is directly mixed-transported without separation, external transportation station, separator and heating furnace, and is transported to a large station through a mixed-transporting pipeline for separation treatment. The emerging conveying mode can greatly reduce the investment cost and the labor cost due to the reduction of the management difficulty; meanwhile, because a pressure container is cancelled, the safety level is reduced, and the production energy consumption is reduced. The existing mixing and transporting pump can only adapt to the working condition with the gas content of below 80 percent usually, but the gas content of the oil field working condition is more than 95 percent or even higher. Under the working condition of such high gas content, the temperature of the mixed transportation pump rises quickly, so that the mixed transportation pump cannot work normally.

Disclosure of Invention

The invention provides a fluid infusion type oil-gas mixed transportation device, which solves the problems that the existing oil-gas mixed transportation device has slug flow under the working condition of high gas content and a mixed transportation pump is easy to have faults.

The technical scheme adopted by the invention for solving the technical problems is as follows: fluid infusion formula oil gas thoughtlessly defeated device, including the defeated pump of thoughtlessly, the defeated admission pipe of thoughtlessly is connected to the entry end of defeated pump of thoughtlessly, defeated pump of thoughtlessly exports the discharge pipe and connects the tee bend, a tee bend branch pipe sets up the valve and connects the defeated discharge house steward of thoughtlessly, another tee bend branch pipe sets up the valve and connects vapour and liquid separator, vapour and liquid separator's gas outlet sets up the valve and connects the defeated discharge house steward of thoughtlessly, vapour and liquid separator's liquid outlet still links to each other with the entry end of defeated pump of thoughtlessly through first fluid infusion pipe, set up the valve on the first fluid infusion pipe.

Further, the method comprises the following steps: the first liquid supplementing pipe is provided with a first cooler.

Further, the method comprises the following steps: the first liquid supplementing pipe is sequentially provided with a valve, a first cooler, a thermometer, a flowmeter and a valve from a liquid inlet end to a liquid outlet end.

Further, the method comprises the following steps: the liquid supplementing type oil-gas mixed transportation device further comprises a liquid supplementing tank, the liquid supplementing tank is connected with the inlet end of the mixed transportation pump through a second liquid supplementing pipe, a first pipeline pump and a valve are arranged on the second liquid supplementing pipe, and the liquid inlet end of the first pipeline pump is connected with the liquid supplementing tank.

Further, the method comprises the following steps: still set up first check valve on the second fluid infusion pipe, vapour and liquid separator and fluid infusion jar set up in the fluid infusion sled.

Further, the method comprises the following steps: the mixing and conveying pump is provided with a cooling structure.

Specifically, the method comprises the following steps: the cooling structure is as follows: the mixed transportation pump is provided with a pump body interlayer, the pump body interlayer is provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are provided with cooling pipelines, and the cooling pipelines are sequentially provided with a valve, a cooling medium box, a second pipeline pump, a second cooler and a filter from the liquid outlet to the liquid inlet.

Further, the method comprises the following steps: the top of the gas-liquid separator is provided with a first safety valve, the bottom of the gas-liquid separator is provided with an emptying valve, and the gas-liquid separator is also provided with a temperature detector.

Further, the method comprises the following steps: a bypass pipe is arranged between the inlet end and the outlet end of the mixed transportation pump, a second safety valve is arranged on the bypass pipe, valves are respectively arranged at the inlet end and the outlet end of the second safety valve, a connecting pipe is arranged between the inlet end of the valve at the inlet end of the second safety valve and the outlet end of the mixed transportation pump, and a valve is arranged on the connecting pipe.

Further, the method comprises the following steps: the mixed transportation inlet pipe is provided with a valve and a filtering device, and the mixed transportation discharge pipe is provided with a second check valve.

The invention has the beneficial effects that: after being pressurized by the mixing transportation pump, the oil-gas mixture enters the gas-liquid separator, and the separated liquid enters the mixing transportation pump through the first liquid supplementing pipe, so that the occupation ratio of the liquid entering the transportation pump is increased, and the method is suitable for the production working conditions of high gas content and frequent slug flow.

The first liquid supplementing pipe is provided with the first cooler, so that the separated liquid enters the mixed transportation pump after being cooled, and the temperature of the mixed transportation pump is controlled conveniently. The liquid supplementing type oil-gas mixed transportation device further comprises a liquid supplementing tank, liquid can be supplemented to the mixed transportation pump through the second liquid supplementing pipe, and the proportion of liquid entering the transportation pump is increased. The mixing and transporting pump is provided with a cooling structure, so that the mixing and transporting pump is cooled, and the safe and normal operation of the mixing and transporting pump is ensured.

Drawings

FIG. 1 is a schematic diagram of the fluid-supplementing oil-gas mixture transportation device of the invention.

Reference numerals: the system comprises a mixed transportation pump 1, a mixed transportation inlet pipe 2, a mixed transportation discharge pipe 3, a mixed transportation discharge header pipe 4, a gas-liquid separator 5, a first liquid supplementing pipe 6, a first cooler 7, a flow meter 8, a liquid supplementing tank 9, a second liquid supplementing pipe 10, a first pipeline pump 11, a first check valve 12, a cooling pipeline 13, a cooling medium tank 14, a second pipeline pump 15, a second cooler 16, a filter 17, a first safety valve 18, an emptying valve 19, a bypass pipe 20, a second safety valve 21, a connecting pipe 22, a filtering device 23 and a second check valve 24.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in figure 1, the fluid infusion type oil-gas mixed transportation device comprises a mixed transportation pump 1, wherein the inlet end of the mixed transportation pump 1 is connected with a mixed transportation inlet pipe 2, and an oil-gas mixture enters the mixed transportation pump 1 from the mixed transportation inlet pipe 2 for pressurization mixed transportation. The mixed transportation inlet pipe 2 is provided with a valve and a filtering device 23, so that the oil-gas mixture enters the mixed transportation pump 1 after impurities are filtered, and the mixed transportation pump 1 is protected to stably run. For example, the mixing input inlet pipe 2 is provided with an electric ball valve, and the electric ball valve is controlled by an instrument sensor and the like, so that the flow of an inlet and an outlet can be controlled. The outlet end of the mixed transportation pump 1 is connected with a mixed transportation discharge pipe 3, the mixed transportation discharge pipe 3 is connected with a tee joint, one branch pipe of the tee joint is provided with a valve and is connected with a mixed transportation discharge main pipe 4, and the other branch pipe of the tee joint is provided with a valve and is connected with a gas-liquid separator 5. In order to avoid backflow, a second check valve 24 is arranged on the mixed transportation and discharge pipe 3, and an electric ball valve is arranged between the second check valve 24 and the tee joint.

In order to ensure the safety of the mixing pump 1 and prevent the mixing pump 1 from being damaged due to overhigh pressure of the mixing discharge pipe 3, a bypass pipe 20 is arranged between the inlet end and the outlet end of the mixing pump 1, a second safety valve 21 is arranged on the bypass pipe 20, and valves are respectively arranged at the inlet end and the outlet end of the second safety valve 21. A connecting pipe 22 is arranged between the inlet end of the valve at the inlet end of the second safety valve 21 and the outlet end of the mixing and transportation pump 1, and the valve is arranged on the connecting pipe 22. The connecting pipe 22 is substantially directly connected to the inlet end and the outlet end of the mixing pump 1, and if the mixing inlet pipe 2 has positive pressure and the mixing pump 1 is in maintenance, the oil-gas mixture can directly flow out through the connecting pipe 22. The outlet side and the inlet side of the mixing and transporting pump 1 are respectively provided with a temperature measuring device and a pressure measuring device.

A valve is provided at a gas outlet of the gas-liquid separator 5 and connected to the mixture discharge header 4, and in fig. 1, the gas outlet of the gas-liquid separator 5 is provided at an upper portion of the gas-liquid separator 5. The liquid outlet of the gas-liquid separator 5 is provided with a valve and is connected with the mixed output main pipe 4, the liquid outlet of the gas-liquid separator 5 is also connected with the inlet end of the mixed output pump 1 through a first liquid supplementing pipe 6, and the first liquid supplementing pipe 6 is provided with a valve. The top of the gas-liquid separator 5 is provided with a first safety valve 18, the bottom is provided with an emptying valve 19, and the gas-liquid separator 5 is also provided with a temperature detector. When slug flow appears in oil-gas mixed transportation and the mixed transportation pump 1 can not transport, the separated liquid medium is transported to the inlet end of the mixed transportation pump 1 through the first liquid supplementing pipe 6, so that the gas content in the oil-gas mixture entering the mixed transportation pump 1 is reduced, and normal transportation is ensured.

The higher the gas content of the oil-gas mixture is, the higher the conveying temperature is, and simultaneously, the temperature of the pump body of the mixing and conveying pump 1 is also increased (up to 120 ℃), and the temperature of the fluid infusion medium is correspondingly high. The liquid medium separated by the gas-liquid separator 5 is usually low-water-content condensate oil, the distillate is vaporized at 20 ℃ and 80 ℃ and even is specially gaseous, the requirement of liquid supplement cannot be met, and the temperature of the pump body of the mixing and conveying pump 1 is continuously increased to form vicious circle. Therefore, the fluid infusion liquid needs to be cooled, for example, to about 50 ℃ so that the fluid infusion liquid is basically in a liquid state, the spiral sleeve can be lubricated, an oil film sealing cavity is formed, and normal gas delivery is guaranteed. The first liquid replenishing pipe 6 is preferably provided with a first cooler 7. As shown in fig. 1, the first liquid supply pipe 6 is provided with a valve, a first cooler 7, a thermometer, a flowmeter 8 and a valve in order from the liquid inlet end to the liquid outlet end. Wherein, the flowmeter 8 is connected with the control valve in series and then connected with the ball valve in parallel, and the valve at the outlet of the flowmeter 8 is preferably an electric ball valve.

In order to avoid the situation that the first liquid supplementing pipe 6 is insufficient in liquid supplementing, the liquid supplementing oil-gas mixed transportation device further comprises a liquid supplementing tank 9, the liquid supplementing tank 9 is connected with the inlet end of the mixed transportation pump 1 through a second liquid supplementing pipe 10, a first pipeline pump 11 and a valve are arranged on the second liquid supplementing pipe 10, and the liquid inlet end of the first pipeline pump 11 is connected with the liquid supplementing tank 9. The second liquid replenishing pipe 10 and the first liquid replenishing pipe 6 are independently controlled, and liquid replenishing can be performed simultaneously or alternatively. The liquid in the liquid supplementing tank 9 can be water, preferably an oil-water mixture; the liquid can be supplemented to the liquid supplementing tank 9 by a tank truck, and the liquid can also be supplemented by a pipeline. The second liquid replenishing pipe 10 is also provided with a first check valve 12.

The high gas content working condition is less in liquid conveying, even in a pure gas state, and the temperature of the pump body of the mixed conveying pump 1 can gradually rise, particularly at the outlet end. In order to cool the mixing and transporting pump 1, the mixing and transporting pump 1 is provided with a cooling structure, and the cooling mode of the cooling structure can be air cooling, water cooling or oil cooling. For example, as shown in fig. 1, the mixing and transporting pump 1 is provided with a pump body interlayer, the pump body interlayer is provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are provided with a cooling pipeline 13, and the cooling pipeline 13 is provided with a valve, a cooling medium tank 14, a second pipeline pump 15, a second cooler 16 and a filter 17 in sequence from the liquid outlet to the liquid inlet. Two valves can be arranged between the liquid outlet of the cooling pipeline 13 and the cooling medium box 14, and a temperature measuring device is arranged between the two valves. A valve is provided between the cooling medium tank 14 and the second pipe pump 15. The mixing and transporting pump 1 is a screw pump and is driven by a variable frequency motor, and the mixing and transporting pump 1 introduces a cooling medium for circulating cooling, radiating and cooling to ensure the safe and normal operation of the mixing and transporting pump 1 and simultaneously relieve the vaporization condition of the liquid supplementing liquid of the first liquid supplementing pipe 6 and the second liquid supplementing pipe 10.

The mixing and conveying pump 1 generates a certain amount of heat during the conveying of the medium, which is generally carried away by the medium. However, when the temperature of the medium is higher than the temperature generated by the mixing and transporting pump 1, the medium is not tight and cannot take away heat, but the temperature of the pump body of the mixing and transporting pump 1 continuously rises, and the stable operation of the mixing and transporting pump 1 is further influenced. Through the cooling structure of the mixed transportation pump 1, the temperature of the pump body is reduced, and the stable operation of the mixed transportation pump 1 is ensured.

The cooling structure of the mixing and conveying pump 1 is that the mixing and conveying pump 1 is arranged on a pump skid, and the gas-liquid separator 5 and the liquid supplementing tank 9 are arranged on the liquid supplementing skid, as shown by two dotted line frames in fig. 1. The prying room is a heat-insulation corrugated board room and is provided with a gas detection device, a ventilation device, a heating device and a video monitoring device. The pump skid size can be 8000mm multiplied by 3400mm multiplied by 2950mm, and the fluid infusion skid size can be 7000mm multiplied by 3000mm multiplied by 2950 mm.