Crude oil sampling and moisture content reinspection device

Abstract

The utility model discloses a crude oil sampling and moisture content reinspection device which comprises a sampling branch pipe erected on a crude oil pipeline, and the two ends of the sampling branch pipe are communicated with the crude oil pipeline respectively. The sampling branch pipe is communicated with a buffer tank through a pipeline, an oil outlet of the buffer tank is communicated with a measuring cylinder through a pipeline, an oil outlet of the measuring cylinder is communicated with a collecting box through a pipeline, an oil outlet of the collecting box is communicated with a liquid discharge pump through a pipeline, and an oil outlet of the liquid discharge pump is communicated to the sampling branch pipe through a pipeline. The utility model aims to provide a crude oil sampling and moisture content reinspection device which can realize automatic sampling, integrates sampling and reinspection, and is time-saving and labor-saving. Meanwhile, an oil conveying loop is formed, and waste of crude oil is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of crude oil sampling and water content analysis equipment, and particularly relates to a crude oil sampling and water content re-inspection device. Background Technique

[0002] In a crude oil production system, the upstream mining unit warms the extracted crude oil mixture and transports it to the downstream crude oil receiving unit through a crude oil gathering and transportation pipeline. The upstream unit does not have the ability to dehydrate the crude oil mixture. At the same time, in order to calculate the volume of the transported crude oil mixture, both the upstream and downstream units have installed flow meters for easy comparison. Meanwhile, the downstream receiving unit calculates the water content in the crude oil mixture transported by the upstream unit through a crude oil water content analyzer. The water content value measured by the crude oil water content analyzer is delivered to the upstream unit to calculate the pure oil volume. For this work, the upstream external transportation unit arranges special personnel to stay in the downstream receiving unit for on-site supervision and coordination. In order to eliminate the inaccuracy of data caused by the inherent error of the crude oil water content analyzer detection and the change in water content during the transportation process, the receiving unit needs to re-inspect the water content of the crude oil again. Finally, in a scientific and effective way, both parties can jointly recognize and have no objection to the measured water content value, so as to eliminate unnecessary disputes caused by inaccurate crude oil water content between the two parties. Currently, in crude oil sampling, most still adopt manual sampling, that is, oil samples are extracted at intervals from the metered output crude oil, and then the samples are transferred to the laboratory for qualitative analysis, which is time-consuming and laborious. Moreover, the treatment of the sampled samples is also a relatively big problem, and improper treatment will cause environmental pollution. Content of the Utility Model

[0003] The purpose of the utility model is to provide a crude oil sampling and water content re-inspection device, which can realize automatic sampling, integrate sampling and re-inspection, saving time and effort; at the same time, form an oil transportation loop to avoid waste of crude oil.

[0004] The technical solution adopted by the utility model is that the oil sampling and water content re-inspection device includes a sampling branch pipe erected on the crude oil pipeline, and both ends of the sampling branch pipe are respectively communicated with the crude oil pipeline; a buffer tank is communicated with the sampling branch pipe through a pipeline, the oil outlet of the buffer tank is communicated with a measuring cylinder through a pipeline, the oil outlet of the measuring cylinder is communicated with a collection box through a pipeline, the oil outlet of the collection box is communicated with a drain pump through a pipeline, and the oil outlet of the drain pump is communicated to the sampling branch pipe through a pipeline.

[0005] The characteristics of the utility model also lie in:

[0006] An exhaust hole is opened on one side of the top of the buffer tank; a stirring blade is arranged in the buffer tank; the measuring cylinder is marked with scales.

[0007] A first liquid level collector is arranged on the inner wall of the buffer tank, a second liquid level collector is arranged on the inner wall of the measuring cylinder, and a third liquid level collector is arranged on the inner wall of the collection box.

[0008] A first control switch is arranged on the sampling branch pipe along the crude oil flow direction at the front end of the buffer tank; a second control switch is arranged on the sampling branch pipe between the buffer tank and the drainage pump; a third control switch is arranged on the oil inlet pipeline of the buffer tank; a fourth control switch is arranged on the pipeline between the buffer tank and the measuring cylinder; a fifth control switch is arranged on the pipeline between the measuring cylinder and the collection tank; a sixth control switch is arranged on the pipeline between the collection tank and the drainage pump; a seventh control switch is arranged on the pipeline where the drainage pump is communicated with the sampling branch pipe.

[0009] It further includes a controller. The output end of the controller is connected with the first control switch, the second control switch, the third control switch, the fourth control switch, the fifth control switch, the sixth control switch, the seventh control switch and the drainage pump through wires; the input end of the controller is connected with a first liquid level collector, a second liquid level collector and a third liquid level collector through wires.

[0010] It further includes a frame. The collection tank is arranged on the upper surface of the frame; a support frame is fixed on the frame, the buffer tank is fixed at the upper end of the support frame, and the measuring cylinder is arranged inside the support frame.

[0011] An image acquisition module is further arranged on the frame through a column. The image acquisition module is arranged flush with the measuring cylinder and is connected with the controller.

[0012] The beneficial effects of the utility model are as follows:

[0013] For the crude oil sampling and moisture content re-inspection device of the utility model, the whole device is set as an oil transmission loop, and the sample is finally returned, avoiding the waste of crude oil or the environmental pollution caused by improper sample treatment; at the same time, according to the crude oil sample in the measuring cylinder, based on the density and volume of crude oil and water, the moisture content of crude oil is accurately calculated, realizing the re-inspection work of the moisture content of crude oil, which is intuitive and effective, and the moisture content of crude oil can be obtained without any objection, eliminating unnecessary disputes caused by inaccurate water content in crude oil between both parties. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the crude oil sampling and moisture content re-inspection device of the utility model;

[0015] Figure 2 It is a side view of the crude oil sampling and moisture content re-inspection device of the utility model;

[0016] Figure 3 It is a three-dimensional schematic diagram of the first embodiment of the crude oil sampling and moisture content re-inspection device of the utility model;

[0017] Figure 4 It is a schematic diagram of the control principle of the crude oil sampling and moisture content re-inspection device of the utility model;

[0018] Figure 5 This is a three-dimensional schematic diagram of the second embodiment of the crude oil sampling and water content re-inspection device of the present utility model.

[0019] In the figure: 1, crude oil pipeline; 2, sampling branch pipe; 3, buffer tank; 4, graduated cylinder; 5, collection box; 6, drainage pump; 7, first control switch; 8, second control switch; 9, third control switch; 10, fourth control switch; 11, fifth control switch; 12, sixth control switch; 13, seventh control switch; 14, controller; 15, image acquisition module; 16, frame; 17, support frame; 18, first liquid level sensor; 19, second liquid level sensor; 20, third liquid level sensor. Specific implementation mode

[0020] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific implementation modes.

[0021] The present utility model provides a crude oil sampling and water content re-inspection device, as Figures 1-3 shown, including a sampling branch pipe 2 erected on the crude oil pipeline 1, and both ends of the sampling branch pipe 2 are respectively communicated with the crude oil pipeline 1; a buffer tank 3 is communicated with the sampling branch pipe 2 through a pipeline, and an oil outlet of the buffer tank 3 is communicated with a graduated cylinder 4 through a pipeline. The graduated cylinder 4 is made of a transparent material and is marked with scale lines; an oil outlet of the graduated cylinder 4 is communicated with a collection box 5 through a pipeline, an oil outlet of the collection box 5 is communicated with a drainage pump 6 through a pipeline, and an oil outlet of the drainage pump 6 is communicated with the sampling branch pipe 2 through a pipeline. The above settings form an oil transportation loop to recycle the sampled oil and centrally return it to the crude oil pipeline 1. In order to relieve the transportation pressure on the oil transportation loop, an exhaust hole is opened on one side of the top of the buffer tank 3. At the same time, in order to prevent inaccurate sampling caused by static stratification of crude oil in the buffer tank 3, a stirring blade is arranged inside the buffer tank 3. The setting of the buffer tank 3 can further reduce the impact of crude oil on the sampling device;

[0022] As Figure 4 shown, a first liquid level sensor 18 is arranged on the inner wall of the buffer tank 3, a second liquid level sensor 19 is arranged on the inner wall of the graduated cylinder 4, and a third liquid level sensor 20 is arranged on the inner wall of the collection box 5.

[0023] As Figure 4As shown in the figure, a first control switch 7 is provided on the sampling branch pipe 2 along the crude oil flow direction at the front end of the buffer tank 3 for controlling the on-off of the total oil circuit; a second control switch 8 is provided on the sampling branch pipe 2 between the buffer tank 3 and the drain pump 6 for controlling the flow direction of the sampled crude oil; a third control switch 9 is provided on the inlet pipe of the buffer tank 3; a fourth control switch 10 is provided on the pipe between the buffer tank 3 and the graduated cylinder 4; a fifth control switch 11 is provided on the pipe between the graduated cylinder 4 and the collection tank 5; a sixth control switch 12 is provided on the pipe between the collection tank 5 and the drain pump 6; a seventh control switch 13 is provided on the pipe connecting the drain pump 6 and the sampling branch pipe 2.

[0024] The crude oil sampling and water content re-inspection device of the present utility model further includes a controller 14; the output end of the controller 14 is connected with a first control switch 7, a second control switch 8, a third control switch 9, a fourth control switch 10, a fifth control switch 11, a sixth control switch 12, a seventh control switch 13 and a drain pump 6 through wires; the input end of the controller 14 is connected with a first liquid level collector 18, a second liquid level collector 19 and a third liquid level collector 20 through wires. The liquid level collector transmits the collected liquid level value to the controller, and the controller 14 realizes the start and stop of the control switch according to the set value, thereby realizing the automatic control of the entire sampling process. And, the controller 14 also controls the drain pump 6 according to the liquid level information collected by the third liquid level collector 20 in the collection tank 5, so that the crude oil flows back to the crude oil pipeline 1 along the oil transmission circuit.

[0025] The crude oil sampling and water content re-inspection device of the present utility model further includes a frame 16, as Figure 5 shown, the collection tank 5 is arranged on the upper surface of the frame 16 for supporting the collection tank 5; a support frame 17 is fixed on the frame 16 corresponding to the position of the graduated cylinder 4, the buffer tank 3 is fixed at the upper end of the support frame 17, and the graduated cylinder 4 is arranged inside the support frame 17 for increasing the stability of the graduated cylinder 4. An image acquisition module 15 is also arranged on the frame 16 through a column, the image acquisition module 15 is arranged flush with the graduated cylinder 4, and the image acquisition module 15 is connected with the controller 14. The image acquisition module 15 is used for acquiring images of the liquid in the graduated cylinder 4, and thus re-inspecting the water content of the crude oil according to the acquired images. The calculation formula is as follows:

[0026]

[0027] In the formula, ρ 水 is the density of water, and the value is 1 g / cm 3 , V 水 is the volume of water, which is read through the scale line in the graduated cylinder 4; ρ 油 is the density of crude oil, V 油 is the volume of crude oil, which is read through the scale line in the graduated cylinder 4.

[0028] Since the upstream external transportation unit continuously heats the crude oil, and the temperature is generally controlled at 40 - 50 degrees, it is convenient for the separation of oil and water. That is, the crude oil after sampling can be well separated into oil and water in the measuring cylinder 4, providing convenient conditions for calculating the water content by the density method; and using the density method to recheck the water content is to eliminate the differences and distrust caused by human factors between the two parties. The density method is more intuitive and the calculation is simple.

[0029] Working principle of the utility model crude oil sampling and water content recheck device:

[0030] This device can conduct centralized sampling and interval sampling.

[0031] Centralized sampling:

[0032] During sampling, open the first control switch 7 to make the crude oil flow through the sampling branch pipe 2. After the flow rate is stable, close the second control switch 8, open the third control switch 9. After filling the buffer tank 3, open the second control switch 8 and close the third control switch 9. At the same time, start the stirring blade in the buffer tank 3 to prevent static layering in the buffer tank 3; open the fourth control switch 10 to fill the measuring cylinder 4. After the preset liquid level is reached, the controller 14 controls the fourth control switch 10 to block. After static layering, conduct image acquisition and transmission, and analyze as needed. Open the fifth control switch 11 to empty the measuring cylinder 4. After the liquid level of the collection box 5 is reached, start the drain pump 6 to recover the sample.

[0033] Interval sampling:

[0034] During sampling, open the first control switch 7 to make the crude oil flow through the sampling branch pipe 2. After the flow rate is stable, keep the second control switch 8 open, and open the third control switch 9 in sections until the buffer tank 3 is filled, then close the third control switch 9; start the stirring blade in the buffer tank 3 to prevent static layering in the buffer tank 3; open the fourth control switch 10 to fill the measuring cylinder 4. After the preset liquid level is reached, the controller 14 controls the fourth control switch 10 to block. After static layering, conduct image acquisition and transmission, and analyze as needed. Open the fifth control switch 11 to empty the measuring cylinder 4. After the liquid level of the collection box 5 is reached, start the drain pump 6 to recover the sample.

[0035] Embodiment 1

[0036] This embodiment provides a crude oil sampling and water content recheck device, as Figure 1As shown in the figure, it includes a sampling branch pipe 2 erected on the crude oil pipeline 1. Both ends of the sampling branch pipe 2 are communicated with the crude oil pipeline 1 respectively. A buffer tank 3 is communicated with the sampling branch pipe 2 through a pipeline. The buffer tank 3 is a 1000 ml storage tank. The oil outlet of the buffer tank 3 is communicated with a measuring cylinder 4 through a pipeline. The measuring cylinder 4 is made of transparent material, marked with scale lines, and has a capacity of 500 ml. The oil outlet of the measuring cylinder 4 is communicated with a collection box 5 through a pipeline. The oil outlet of the collection box 5 is communicated with a liquid discharge pump 6 through a pipeline. The oil outlet of the liquid discharge pump 6 is communicated with the sampling branch pipe 2 through a pipeline to form an oil transportation loop.

[0037] Embodiment 2

[0038] This embodiment provides a device for crude oil sampling and moisture content re-inspection. As Figure 5 shown in the figure, it includes a sampling branch pipe 2 erected on the crude oil pipeline 1. Both ends of the sampling branch pipe 2 are communicated with the crude oil pipeline 1 respectively. A buffer tank 3 is communicated with the sampling branch pipe 2 through a pipeline. The buffer tank 3 is a 1000 ml storage tank. An exhaust hole is opened on one side of the top of the buffer tank 3, and a stirring blade is arranged inside. The oil outlet of the buffer tank 3 is communicated with a measuring cylinder 4 through a pipeline. The measuring cylinder 4 is made of transparent material, marked with scale lines, and has a capacity of 500 ml. The oil outlet of the measuring cylinder 4 is communicated with a collection box 5 through a pipeline. The oil outlet of the collection box 5 is communicated with a liquid discharge pump 6 through a pipeline. The oil outlet of the liquid discharge pump 6 is communicated with the sampling branch pipe 2 through a pipeline to form an oil transportation loop.

[0039] The device for crude oil sampling and moisture content re-inspection provided by this embodiment further includes a frame 16. The collection box 5 is arranged on the upper surface of the frame 16. A support frame 17 is fixed on the frame 16. The buffer tank 3 is fixed at the upper end of the support frame 17. The measuring cylinder 4 is arranged inside the support frame 17. An image acquisition module 15 is also arranged on the frame 16 through a column. The image acquisition module 15 uses a high-definition camera, and the high-definition camera is arranged flush with the measuring cylinder 4.

[0040] Embodiment 3

[0041] This embodiment provides a device for crude oil sampling and moisture content re-inspection. As Figure 4 shown in the figure, it includes a sampling branch pipe 2 erected on the crude oil pipeline 1. Both ends of the sampling branch pipe 2 are communicated with the crude oil pipeline 1 respectively. A buffer tank 3 is communicated with the sampling branch pipe 2 through a pipeline. The buffer tank 3 is a 1000 ml storage tank. An exhaust hole is opened on one side of the top of the buffer tank 3, and a stirring blade is arranged inside. The oil outlet of the buffer tank 3 is communicated with a measuring cylinder 4 through a pipeline. The measuring cylinder 4 is made of transparent material, marked with scale lines, and has a capacity of 500 ml. The oil outlet of the measuring cylinder 4 is communicated with a collection box 5 through a pipeline. The oil outlet of the collection box 5 is communicated with a liquid discharge pump 6 through a pipeline. The oil outlet of the liquid discharge pump 6 is communicated with the sampling branch pipe 2 through a pipeline.

[0042] A first liquid level collector 18 is provided on the inner wall of the buffer tank 3, a second liquid level collector 19 is provided on the inner wall of the measuring cylinder 4, and a third liquid level collector 20 is provided on the inner wall of the collection tank 5. A first control switch 7 is provided on the sampling branch pipe 2 at the front end of the buffer tank 3 along the crude oil flow direction; a second control switch 8 is provided on the sampling branch pipe 2 between the buffer tank 3 and the drain pump 6; a third control switch 9 is provided on the inlet pipe of the buffer tank 3; a fourth control switch 10 is provided on the pipe between the buffer tank 3 and the measuring cylinder 4; a fifth control switch 11 is provided on the pipe between the measuring cylinder 4 and the collection tank 5; a sixth control switch 12 is provided on the pipe between the collection tank 5 and the drain pump 6; a seventh control switch 13 is provided on the pipe where the drain pump 6 is connected to the sampling branch pipe 2.

[0043] The crude oil sampling and water content re-inspection device provided in this embodiment further includes a controller 14. The output end of the controller 14 is connected with a first control switch 7, a second control switch 8, a third control switch 9, a fourth control switch 10, a fifth control switch 11, a sixth control switch 12, a seventh control switch 13 and a drain pump 6 through wires; the input end of the controller 14 is connected with a first liquid level collector 18, a second liquid level collector 19 and a third liquid level collector 20 through wires.

[0044] Embodiment 4

[0045] The crude oil sampling and water content re-inspection device provided in this embodiment, as Figure 4 shown, includes a sampling branch pipe 2 erected on the crude oil pipeline 1. The two ends of the sampling branch pipe 2 are respectively communicated with the crude oil pipeline 1; a buffer tank 3 is communicated with the sampling branch pipe 2 through a pipe. The buffer tank 3 is a 1000 ml storage tank. An exhaust hole is opened on one side of the top of the buffer tank 3, and stirring blades are arranged inside; the oil outlet of the buffer tank 3 is communicated with a measuring cylinder 4 through a pipe. The measuring cylinder 4 is made of a transparent material, marked with scale lines, and has a capacity of 500 ml; the oil outlet of the measuring cylinder 4 is communicated with a collection tank 5 through a pipe. The oil outlet of the collection tank 5 is communicated with a drain pump 6 through a pipe. The oil outlet of the drain pump 6 is communicated to the sampling branch pipe 2 through a pipe.

[0046] A first liquid level collector 18 is provided on the inner wall of the buffer tank 3, a second liquid level collector 19 is provided on the inner wall of the measuring cylinder 4, and a third liquid level collector 20 is provided on the inner wall of the collection tank 5. A first control switch 7 is provided on the sampling branch pipe 2 at the front end of the buffer tank 3 along the crude oil flow direction; a second control switch 8 is provided on the sampling branch pipe 2 between the buffer tank 3 and the drain pump 6; a third control switch 9 is provided on the inlet pipe of the buffer tank 3; a fourth control switch 10 is provided on the pipe between the buffer tank 3 and the measuring cylinder 4; a fifth control switch 11 is provided on the pipe between the measuring cylinder 4 and the collection tank 5; a sixth control switch 12 is provided on the pipe between the collection tank 5 and the drain pump 6; a seventh control switch 13 is provided on the pipe where the drain pump 6 is connected to the sampling branch pipe 2.

[0047] The device for crude oil sampling and moisture content re-inspection provided in this embodiment further includes a controller 14. The output end of the controller 14 is connected with a first control switch 7, a second control switch 8, a third control switch 9, a fourth control switch 10, a fifth control switch 11, a sixth control switch 12, a seventh control switch 13 and a liquid discharge pump 6 through wires; the input end of the controller 14 is connected with a first liquid level collector 18, a second liquid level collector 19 and a third liquid level collector 20 through wires.

[0048] The device for crude oil sampling and moisture content re-inspection provided in this embodiment further includes a frame 16. As Figure 5 shown, the collection box 5 is arranged on the upper surface of the frame 16; a support frame 17 is fixed on the frame 16, the buffer tank 3 is fixed at the upper end of the support frame 17, and the measuring cylinder 4 is arranged inside the support frame 17. An image acquisition module 15 is further arranged on the frame 16 through a column. The image acquisition module 15 uses a high-definition camera. The high-definition camera is arranged flush with the measuring cylinder 4 and is also connected with the controller 14.

Claims

1. An apparatus for crude oil sampling and rechecking water content, characterized in that, It includes a sampling branch pipe (2) erected on a crude oil pipeline (1), and both ends of the sampling branch pipe (2) are respectively communicated with the crude oil pipeline (1); a buffer tank (3) is communicated with the sampling branch pipe (2) through a pipeline, an oil outlet of the buffer tank (3) is communicated with a measuring cylinder (4) through a pipeline, an oil outlet of the measuring cylinder (4) is communicated with a collection box (5) through a pipeline, an oil outlet of the collection box (5) is communicated with a liquid discharge pump (6) through a pipeline, and an oil outlet of the liquid discharge pump (6) is communicated with the sampling branch pipe (2) through a pipeline.

2. The crude oil sampling and water cut re-inspection device according to claim 1, wherein, An exhaust hole is opened on one side of the top of the buffer tank (3); stirring blades are arranged in the buffer tank (3); the measuring cylinder (4) is marked with scales.

3. The crude oil sampling and water cut re-inspection device according to claim 1, wherein, A first liquid level collector (18) is arranged on the inner wall of the buffer tank (3), a second liquid level collector (19) is arranged on the inner wall of the measuring cylinder (4), and a third liquid level collector (20) is arranged on the inner wall of the collection box (5).

4. The crude oil sampling and water content re-inspection device according to claim 3, characterized in that, A first control switch (7) is arranged on the sampling branch pipe (2) at the front end of the buffer tank (3) along the crude oil flow direction; a second control switch (8) is arranged on the sampling branch pipe (2) between the buffer tank (3) and the liquid discharge pump (6); a third control switch (9) is arranged on the oil inlet pipeline of the buffer tank (3); a fourth control switch (10) is arranged on the pipeline between the buffer tank (3) and the measuring cylinder (4); a fifth control switch (11) is arranged on the pipeline between the measuring cylinder (4) and the collection box (5); a sixth control switch (12) is arranged on the pipeline between the collection box (5) and the liquid discharge pump (6); a seventh control switch (13) is arranged on the pipeline where the liquid discharge pump (6) is communicated with the sampling branch pipe (2).

5. The crude oil sampling and water cut re-inspection device according to claim 4, characterized in that, It further includes a controller (14), an output end of the controller (14) is connected with the first control switch (7), the second control switch (8), the third control switch (9), the fourth control switch (10), the fifth control switch (11), the sixth control switch (12), the seventh control switch (13) and the liquid discharge pump (6) through wires; an input end of the controller (14) is connected with the first liquid level collector (18), the second liquid level collector (19) and the third liquid level collector (20) through wires.

6. The crude oil sampling and water content re-inspection device according to claim 1, wherein, It further includes a frame (16), the collection box (5) is arranged on the upper surface of the frame (16); a support frame (17) is fixed on the frame (16), the buffer tank (3) is fixed at the upper end of the support frame (17), and the measuring cylinder (4) is arranged inside the support frame (17).

7. The crude oil sampling and water cut re-inspection device according to claim 6, characterized in that, An image acquisition module (15) is further arranged on the frame (16) through a column, the image acquisition module (15) is arranged flush with the measuring cylinder (4), and the image acquisition module (15) is connected with the controller (14).

Images