A self-calibrating oil water cut measurement device

Abstract

The utility model discloses a kind of self-calibration oil water content measuring devices, belong to oil-water mixed fluid measurement field, including flow computer, fluid inlet pipeline, fluid outlet pipeline, electric three-way valve and measuring assembly, the three interfaces of electric three-way valve are respectively communicated with fluid inlet pipeline, fluid outlet pipeline and measuring assembly, the measuring assembly includes respectively with electric three-way valve two interfaces intercommunication measuring tube one and measuring tube two, the measuring tube one outside is wound with electric heat tracing band, the top of measuring tube one and measuring tube two is respectively equipped with insertion rod type oil water content measuring instrument one and insertion rod type oil water content measuring instrument two, the measuring tube one and measuring tube two are communicated by connecting pipe one, one-way valve is equipped on the connecting pipe one, the measuring tube two is communicated with fluid outlet pipeline by connecting pipe two. The utility model has both sampling static measurement and continuous measurement, two kinds of modes can be carried out simultaneously, also can be carried out separately.

Description

Technical Field

[0001] This utility model belongs to the field of oil-water mixed fluid measurement, specifically relating to a self-calibrating oil water content measurement device. Background Technology

[0002] In oil and gas field development, oil-water mixed fluids are present at every node from the wellhead to the crude oil processing station, and in the multiphase flow metering of branch lines, the requirements for the accuracy of oil and water flow measurement are increasing.

[0003] Oil water content measurement plays a crucial role in oil and water flow measurement, and is currently being used in oil and gas applications both domestically and internationally.

[0004] Techniques for measuring water content in upstream oil and gas include X-ray absorption method, microwave method, rod-type multi-probe microwave static measurement method, radio frequency admittance method, capacitance method, and density method. Currently, the rod-type multi-probe microwave static measurement method is widely used in upstream oil and gas applications due to its high accuracy. However, its drawback is that it involves intermittent measurement and cannot meet the requirements for continuous measurement. Continuous measurement, on the other hand, suffers from larger measurement errors due to the complexity of the medium and numerous interference factors. Therefore, there is an urgent need for a continuous measurement method for oil and water content that can be easily calibrated online. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a self-calibrating oil water content measuring device that addresses the shortcomings of the prior art. It combines sampling static measurement and continuous measurement, and the two modes can be performed simultaneously or separately. It uses high-precision static oil water content measurement to calibrate continuous oil water content measurement with large uncertainty, thus meeting the measurement requirements while ensuring measurement accuracy.

[0006] The technical solution adopted by this utility model is: a self-calibrating oil water content measuring device, including a flow computer, a fluid inlet pipe, a fluid outlet pipe, an electric three-way valve, and a measuring component. The three ports of the electric three-way valve are respectively connected to the fluid inlet pipe, the fluid outlet pipe, and the measuring component. The measuring component includes a measuring tube one and a measuring tube two, which are respectively connected to two ports of the electric three-way valve. The measuring tube one is wrapped with an electric heating tape. The top of the measuring tube one and the measuring tube two are respectively equipped with an insertion rod type oil water content measuring instrument one and an insertion rod type oil water content measuring instrument two. The measuring tube one and the measuring tube two are connected by a connecting pipe one. A one-way valve is provided on the connecting pipe one. The measuring tube two is connected to the fluid outlet pipe through the connecting pipe two. The electric three-way valve, the insertion rod type oil water content measuring instrument one, and the insertion rod type oil water content measuring instrument two are respectively connected to the flow computer.

[0007] In one embodiment, the fluid inlet pipe and the fluid outlet pipe are connected by a three-way connector.

[0008] In one embodiment, an oil-water mixer is provided on the fluid inlet line.

[0009] In one embodiment, the connecting pipe is equipped with an electric regulating valve, which is connected to a flow computer.

[0010] In one embodiment, a flow meter is provided on the second connecting pipe, and the flow meter is connected to a flow computer.

[0011] The beneficial effects of this utility model are as follows: it combines sampling static measurement and continuous measurement, and the two modes can be carried out simultaneously or separately. It uses high-precision static oil water content measurement to calibrate continuous oil water content measurement with large uncertainty, which meets the measurement requirements while ensuring the accuracy of the measurement. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0013] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0014] In the diagram: 1. Flow computer; 2. Fluid inlet pipe; 3. Fluid outlet pipe; 4. Electric three-way valve; 5. Measuring assembly; 6. Insertion rod type oil water content meter one; 7. Insertion rod type oil water content meter two; 8. Connecting pipe three; 9. Oil-water mixer; 10. Electric regulating valve; 11. Flow meter; 12. Connecting pipe two; 501. Measuring pipe one; 502. Measuring pipe two; 503. Connecting pipe one; 504. Check valve. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Example 1:

[0017] like Figure 1As shown, this utility model discloses a self-calibrating oil water content measuring device, including a flow computer 1, a fluid inlet pipe 2, a fluid outlet pipe 3, an electric three-way valve 4, and a measuring component 5. The three ports of the electric three-way valve 4 are respectively connected to the fluid inlet pipe 2, the fluid outlet pipe 3, and the measuring component 5. The measuring component 5 includes a measuring tube 501 and a measuring tube 502 respectively connected to two ports of the electric three-way valve 4. The measuring tube 501 is wrapped with an electric heating tape. The top of tube 1 (501) and measuring tube 2 (502) are respectively equipped with a first-type oil water content meter 6 and a second-type oil water content meter 7. The first-type measuring tube 501 and the second-type measuring tube 2 (502) are connected by a first-type connecting pipe 503. A one-way valve 504 is provided on the first-type connecting pipe 503. The second-type measuring tube 2 (502) is connected to the fluid outlet pipe 3 through the second-type connecting pipe. The electric three-way valve 4, the first-type oil water content meter 6 and the second-type oil water content meter 7 are respectively connected to the flow computer 1.

[0018] This utility model relates to a self-calibrating oil water content measuring device, which includes a self-calibrating oil water content measuring method, comprising the following steps:

[0019] Step 1: The flow computer 1 controls the electric three-way valve 4 to open the channel between the fluid inlet pipe 2 and the measuring tube 1 501 and the measuring tube 2 502. The oil-water mixed fluid enters the device through the fluid inlet pipe 2 and then enters the measuring tube 1 501 and the measuring tube 2 502 through the electric three-way valve 4. If continuous measurement is to be performed, proceed to step 2. If sampling static measurement is to be performed, proceed to step 3.

[0020] Step 2: The oil-water mixture enters the connecting pipe 2 through the measuring pipe 2 502 and is discharged from the device through the fluid outlet pipe 3. During this process, the rod-type oil water content measuring instrument 2 7 records the oil water content in real time and outputs the recorded data to the flow computer 1.

[0021] Step 3: The flow computer 1 controls the electric three-way valve 4 to close the channel between the fluid inlet pipe 2 and the measuring tube 501. Some oil-water mixed fluid remains in the measuring tube 501, and then proceed to step 4.

[0022] Step 4: Set the heating time in the flow computer 1, and the electric heating tape will work to heat the measuring tube 501. Under the action of high temperature, the oil-water mixture in the measuring tube 501 will continue to dewax, settle mud and sand, and expel air bubbles. When the set heating time is reached, insert the rod-type oil water content measuring instrument 6 to measure the oil water content and output the measured data to the flow computer 1.

[0023] This embodiment also includes a calibration step 7 for the insertion rod type oil water content measuring instrument, as detailed below:

[0024] The flow computer 1 calibrates the oil water content data recorded in real time by the insertion rod type oil water content measuring instrument 6 based on the oil water content data obtained from the insertion rod type oil water content measuring instrument 6.

[0025] This embodiment is used for measuring the water content of low-flow-rate oil.

[0026] Example 2:

[0027] like Figure 2 As shown, this utility model discloses a self-calibrating oil water content measuring device, including a flow computer 1, a fluid inlet pipe 2, a fluid outlet pipe 3, an electric three-way valve 4, and a measuring component 5. The three ports of the electric three-way valve 4 are respectively connected to the fluid inlet pipe 2, the fluid outlet pipe 3, and the measuring component 5. The measuring component 5 includes a measuring tube 501 and a measuring tube 502 respectively connected to two ports of the electric three-way valve 4. The measuring tube 501 is wrapped with an electric heating tape. The top of tube 1 (501) and measuring tube 2 (502) are respectively equipped with a first-type oil water content meter 6 and a second-type oil water content meter 7. The first-type measuring tube 501 and the second-type measuring tube 2 (502) are connected by a first-type connecting pipe 503. A one-way valve 504 is provided on the first-type connecting pipe 503. The second-type measuring tube 2 (502) is connected to the fluid outlet pipe 3 through the second-type connecting pipe. The electric three-way valve 4, the first-type oil water content meter 6 and the second-type oil water content meter 7 are respectively connected to the flow computer 1.

[0028] In this embodiment, the fluid inlet pipe 2 and the fluid outlet pipe 3 are connected by a connecting pipe 8.

[0029] In this embodiment, an oil-water mixer 9 is provided on the fluid inlet pipe 2.

[0030] In this embodiment, the connecting pipe 8 is equipped with an electric regulating valve 10, which is connected to the flow computer 1.

[0031] In this embodiment, a flow meter 11 is provided on the second connecting pipe, and the flow meter 11 is connected to the flow computer 1.

[0032] This utility model relates to a self-calibrating oil water content measuring device, which includes a self-calibrating oil water content measuring method, comprising the following steps:

[0033] Step 1: The flow computer 1 controls the electric three-way valve 4 to open the channel between the fluid inlet pipe 2 and the measuring tube 1 501 and the measuring tube 2 502. The oil-water mixed fluid enters the device through the fluid inlet pipe 2 and then enters the measuring tube 1 501 and the measuring tube 2 502 through the electric three-way valve 4. If continuous measurement is to be performed, proceed to step 2. If sampling static measurement is to be performed, proceed to step 3.

[0034] Step 2: The oil-water mixture enters the connecting pipe 2 through the measuring pipe 2 502 and is discharged from the device through the fluid outlet pipe 3. During this process, the rod-type oil water content measuring instrument 2 7 records the oil water content in real time and outputs the recorded data to the flow computer 1.

[0035] Step 3: The flow computer 1 controls the electric three-way valve 4 to close the channel between the fluid inlet pipe 2 and the measuring tube 501. Some oil-water mixed fluid remains in the measuring tube 501, and then proceed to step 4.

[0036] Step 4: Set the heating time in the flow computer 1, and the electric heating tape will work to heat the measuring tube 501. Under the action of high temperature, the oil-water mixture in the measuring tube 501 will continue to dewax, settle mud and sand, and expel air bubbles. When the set heating time is reached, insert the rod-type oil water content measuring instrument 6 to measure the oil water content and output the measured data to the flow computer 1.

[0037] This embodiment also includes a calibration step 7 for the insertion rod type oil water content measuring instrument, as detailed below:

[0038] The flow computer 1 calibrates the oil water content data recorded in real time by the insertion rod type oil water content measuring instrument 6 based on the oil water content data obtained from the insertion rod type oil water content measuring instrument 6.

[0039] This embodiment also includes a high-volume sampling step, as detailed below:

[0040] The oil-water mixture enters the oil-water mixer 9 through the fluid inlet pipe 2 and is mixed inside the oil-water mixer 9. Part of the mixed oil-water mixture enters the measuring component 5, while the remaining oil-water mixture enters the connecting pipe 3 8 and is discharged through the fluid outlet pipe 3 after passing through the electric regulating valve 10.

[0041] This embodiment also includes a diversion flow rate adjustment step, as detailed below:

[0042] The flow meter 11 acquires flow data in real time and outputs the acquired flow data to the flow computer 1. The flow computer 1 controls the opening degree of the electric regulating valve 10 based on the acquired flow data.

[0043] This embodiment is used for measuring large-flow-rate oil-water mixed fluids. The oil-water mixer 9 is designed to thoroughly mix the oil and water, ensuring the typicality of the sample and thus guaranteeing the accuracy of the final static measurement.

[0044] The apparatus and method included in the above two embodiments can be selected according to the on-site working conditions. If the flow rate of the oil-water mixture to be measured is small and the measuring tube is small, the apparatus of Embodiment 1 can be selected; if the flow rate of the oil-water mixture to be measured is large and the measuring tube is large, components can be added to the apparatus of Embodiment 1, and the apparatus can be switched to the apparatus involved in Embodiment 2 to meet the measurement requirements.

[0045] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A self-calibrating oil water content measuring device, characterized in that: The system includes a flow computer (1), a fluid inlet pipe (2), a fluid outlet pipe (3), an electric three-way valve (4), and a measuring component (5). The three ports of the electric three-way valve (4) are respectively connected to the fluid inlet pipe (2), the fluid outlet pipe (3), and the measuring component (5). The measuring component (5) includes a measuring tube one (501) and a measuring tube two (502) respectively connected to two ports of the electric three-way valve (4). The measuring tube one (501) is wrapped with an electric heating tape. The measuring tube one (501) and the measuring tube two (502) are respectively connected to two ports of the electric three-way valve (4). 2) The top is equipped with an insertion rod type oil water content measuring instrument one (6) and an insertion rod type oil water content measuring instrument two (7). The measuring tube one (501) and the measuring tube two (502) are connected by a connecting pipe one (503). A one-way valve (504) is provided on the connecting pipe one (503). The measuring tube two (502) is connected to the fluid outlet pipeline (3) through the connecting pipe two (12). The electric three-way valve (4), the insertion rod type oil water content measuring instrument one (6) and the insertion rod type oil water content measuring instrument two (7) are respectively connected to the flow computer (1).

2. The self-calibrating oil water content measuring device according to claim 1, characterized in that, The fluid inlet pipe (2) and the fluid outlet pipe (3) are connected by a connecting pipe (8).

3. The self-calibrating oil water content measuring device according to claim 2, characterized in that, An oil-water mixer (9) is provided on the fluid inlet pipe (2).

4. The self-calibrating oil water content measuring device according to claim 2, characterized in that, An electric regulating valve (10) is provided on the connecting pipe (8), and the electric regulating valve (10) is connected to the flow computer (1).

5. The self-calibrating oil water content measuring device according to claim 1, characterized in that, A flow meter (11) is provided on the second connecting pipe (12), and the flow meter (11) is connected to the flow computer (1).

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