CN216051251U - Fracturing fluid friction resistance on-line measuring device - Google Patents
Fracturing fluid friction resistance on-line measuring device Download PDFInfo
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- CN216051251U CN216051251U CN202122153441.3U CN202122153441U CN216051251U CN 216051251 U CN216051251 U CN 216051251U CN 202122153441 U CN202122153441 U CN 202122153441U CN 216051251 U CN216051251 U CN 216051251U
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Abstract
The utility model belongs to the technical field of experimental devices in the field of petroleum, and particularly relates to an online detection device for friction resistance of fracturing fluid. The real-time friction resistance and the resistance reduction performance of the fracturing fluid are calculated through a pressure drop method through flow-pressure difference series data acquired by a flow sensor and a pressure difference sensor. The utility model can directly utilize the pressure difference between the outlet and the inlet of the fracturing site sand mixing truck as a power source, does not need to be additionally provided with any power system, does not cause leakage and waste of the fracturing fluid, and can accurately calculate the friction resistance and the drag reduction rate data of the fracturing fluid under the site condition to guide the site fluid preparation and the fracturing construction.
Description
Technical Field
The utility model belongs to the technical field of experimental devices in the field of petroleum, and particularly relates to an online detection device for friction resistance of fracturing fluid.
Background
According to the current conditions of research and requirements of equipment at home and abroad, the resistance reduction rate in testing at home and abroad is generally based on the principle of similar simulation, and an indoor large-scale loop resistance reduction rate tester is adopted to test under the conditions of similar flow rate, shearing rate, Reynolds number and the like, so that the problems of complex process, large occupied area of the tester, high requirement on experimental operation environment, large liquid quantity for testing, long testing period, complex procedure, high requirement on operators and the like exist, and the device is not suitable for fracturing field use. And because the resistance reduction performance of the fracturing fluid can be seriously influenced by the problems of difference of the water quality of the prepared fluid on site, suction of a liquid adding pump and the like, the resistance reduction performance of the fracturing fluid on site cannot be truly reflected by data obtained by indoor tests. Therefore, the simple fracturing fluid resistivity reduction testing instrument capable of meeting the field real-time measurement requirement has important practical significance. At present, research and development and evaluation of related products of slickwater fracturing fluid drag reducers become the current hot spots, and particularly, accurate measurement of the friction resistance value of on-site emulsion slickwater also becomes a concern of people.
The drag reduction mechanism of the drag reducer is complex, the drag reduction effect and the superiority and inferiority of the drag reducer are difficult to analyze from the chemical components of the drag reducer, the drag reduction effect and the superiority and inferiority are influenced by the difference of the water quality of the on-site liquid preparation and the suction of a liquid adding pump, and the data obtained by indoor tests are difficult to truly reflect the drag reduction performance of the on-site fracturing fluid. With the large-scale popularization and application of the third-generation fracturing technology in China, a test instrument which is simple and can truly reflect the resistance reduction performance of the on-site fracturing fluid is very necessary to be researched, the successful research and development of the instrument is beneficial to on-site technicians to accurately estimate the fracturing friction, timely find the problems related to the on-site fracturing fluid, accurately analyze the reasons of abnormal construction pressure, rapidly troubleshoot the problems and optimize the construction discharge capacity so as to ensure the on-site fracturing construction. The technical problem of the engineering is solved to adapt to the trend change of the main fracturing process, and the technical support is provided for the efficient exploration and development of shale oil and gas.
The renting performance of the fracturing fluid is influenced by conditions such as the addition amount of a drag reducer and the water quality of prepared liquid water, test data in a laboratory cannot represent an actual value during construction, and no simple device which can be used for testing the renting performance of the fracturing fluid on a fracturing construction site is available on the market at present.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a simple on-line detection device for friction resistance of fracturing fluid, which can meet the real-time measurement requirement on site.
In order to solve the problems, the utility model provides an online fracturing fluid friction resistance detection device which comprises a test coil, wherein the inlet end of the test coil is connected with an outlet end connector of a sand mixer through a liquid inlet pipeline, the outlet end of the test coil is connected with an inlet end connector of the sand mixer through a liquid outlet pipeline, high-pressure liquid at the outlet of the sand mixer flows into the inlet of a low-pressure sand mixer to form a closed test loop after passing through the online fracturing fluid friction resistance detection device, a flow sensor is connected into the liquid outlet pipeline, and a differential pressure sensor is connected between the inlet end and the outlet end of the test coil.
Further, still include the buffer tank, the buffer tank is connected between feed liquor pipeline and test coil pipe, and the top of irritating of buffer tank has the medium entry, and the tank bottoms has the medium export, and the feed liquor pipeline meets with the medium entry, test coil pipe and medium export.
Furthermore, the buffer tank is used as an axis, and the test coil is spirally wound on the outer wall of the buffer tank.
Furthermore, a flow control valve is connected into the liquid inlet pipeline.
Furthermore, the buffer tank is a cylindrical tank body, the test coil pipe and the buffer tank are in tangential intersection, and the liquid inlet pipeline and the buffer tank are in tangential intersection.
Further, the tank bottom of buffer tank has the blowdown mouth, is provided with the blowoff valve on the blowdown mouth and is connected with the blowdown pipeline.
Further, the pipe diameters of the liquid inlet pipeline and the liquid outlet pipeline are larger than the pipe diameter of the testing coil pipe.
The utility model also provides a testing method of the fracturing fluid friction on-line detection device, the pressure difference sensor is used for acquiring the pressure difference between the inlet end and the outlet end of the testing coil pipe, the flow sensor is used for acquiring real-time flow data, and the real-time friction and the resistance reduction performance of the fracturing fluid are calculated through a pressure drop method according to the flow-pressure difference series data acquired by the flow sensor and the pressure difference sensor.
Further, before testing, clear water and the same fracturing fluid are respectively used for two groups of experiments to obtain basic calculation data; respectively measuring the friction resistance by clear water variable displacement of a straight pipe friction resistance instrument with the indoor inner diameter of 10mm and the length of 3.2m, and measuring the friction resistance by fracturing fluid variable displacement of a straight pipe friction resistance instrument with the indoor inner diameter of 10mm and the length of 3.2 m; the on-line detection device tests the variable displacement friction resistance of the coil pipe with the inner diameter of 10mm and the length of 3.2m and carries out the displacement-friction resistance F(Water clear, straight tube)、 F(fracturing fluid, straight pipe)、F(fracturing fluid, coiled pipe)And fitting a formula.
Further, the bending friction resistance of the fracturing fluid tested by the online detection device is as follows:
F(bending)＝F(fracturing fluid, coiled pipe)-F(the amount of the fracturing fluid,straight barPipe)；
The friction resistance of the fracturing fluid along the way when the online detection device is applied on site is as follows:
F(on the way)＝F’(fracturing fluid, coiled pipe)-F(bending)；
The resistance reduction rate of the fracturing fluid when the online detection device is applied on site is as follows:
compared with the prior art, the utility model has the advantages that:
1. the device has the advantages of small volume, light weight and convenient carrying, and is mainly used for the friction resistance test of the fracturing fluid on a fracturing site. Hydraulic pressure is provided through the sand mulling/liquid supply pry, an additional electric driving device is not needed, and the adaptability of the device on a fracturing site is enhanced. The pressure drop is tested through the coil pipe, the occupied space of a test pipeline is reduced, and the size of the device is reduced. Through the buffer tank, the full swelling of the drag reducer/densifier molecules is realized, and the method is suitable for the online mixing process of the emulsion fracturing liquid system in the fracturing site. The control of the flow of the test pipeline is realized by adjusting the differential pressure through the opening of the valve. The device test liquid need not the sample, does not cause the waste of fracturing fluid and does not influence safety ring guarantor, directly is under construction and uses after getting into the fracturing blender truck entry through going out the liquid pipeline. The formula of the on-way friction of the clean water and the formula of the bending friction of the coil pipe are obtained through checking with an indoor friction resistance instrument. The defects of poor adaptability and large error of a fluid mechanics formula are overcome, and the accuracy of a test result is improved.
2. The device has the advantages that the pressure difference between the outlet and the inlet of the fracturing site sand mixing truck can be directly utilized as a power source, no power system is required to be additionally arranged, and the leakage and the waste of the fracturing fluid are avoided.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1-outlet end connector of sand mixing truck; 2-a flow control valve; 3-a liquid inlet pipeline; 4-a buffer tank; 5-testing the coil pipe; 6-a blowdown valve; 7-a sewage line; 8-a flow sensor; 9-a pressure detection unit; 10-pressure sensing line; 11-liquid outlet line; 12-inlet end connector of sand mixing truck.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
As shown in fig. 1; an on-line detection device for friction resistance of fracturing fluid comprises a test coil pipe 5, wherein the inlet end of the test coil pipe 5 is connected with an outlet end connector 1 of a sand mixing truck through a liquid inlet pipeline 3, the outlet end of the test coil pipe 5 is connected with an inlet end connector 12 of the sand mixing truck through a liquid outlet pipeline 11, the outlet end connector 1 of the sand mixing truck and the inlet end connector 12 of the sand mixing truck are respectively connected to an outlet and an inlet of the sand mixing truck to form a closed test loop, a flow sensor 8 is connected into the liquid outlet pipeline 11, a differential pressure sensor is connected between the inlet end and the outlet end of the test coil pipe 5 and comprises a pressure detection unit 9 respectively arranged at the inlet end and the outlet end of the test coil pipe 5, and the two pressure detection units are connected through a pressure sensing line 10 to realize data transmission; it is also possible to override the differential pressure sensor with two common pressure detectors, in which arrangement the differential pressure is calculated manually from the test values of the two pressure detectors. This device need not external charge pump drive arrangement, directly uses the exit & entrance differential pressure of fracturing blender truck as power source, and the outlet end of fracturing blender truck is directly received to fracturing blender truck's outlet end joint 1 on the inlet pipeline 3, can provide the pressure about 0.3MPa for the device, and the fracturing blender truck inlet end joint 12 on the play liquid pipeline 11 is directly received on the inlet end of fracturing blender truck, not only can realize the negative pressure and increase energy, can also all retrieve the fracturing fluid of testing, embodies the feature of environmental protection of device. To reduce the on-way pressure loss, the inlet pipe 3 and the outlet pipe 11 have larger pipe diameters than the test coil 5.
As the fracturing fluid needs more than 30 seconds of swelling time to fully exert the drag reduction effect when the fracturing fluid is mixed on line, the fracturing fluid also comprises a buffer tank 4, the buffer tank 4 is connected between a liquid inlet pipeline 3 and a testing coil pipe 5, the top of the buffer tank 4 is provided with a medium inlet, the bottom of the tank is provided with a medium outlet, the liquid inlet pipeline 3 is connected with the medium inlet, and the testing coil pipe 5 is connected with the medium outlet. The buffer tank can provide buffer time of not less than 30s, so that the test value is closer to the actual value. The fracturing fluid can be the existing fracturing fluid prepared in advance, can also be a liquid drag reducer directly filled into a sand mixing tank through a continuous mixing process, and can not be connected with a buffer tank for the fracturing fluid prepared in advance.
The buffer tank 4 is used as an axis, and the test coil 5 is spirally wound on the outer wall of the buffer tank 4. The volume of the device can be greatly reduced, and the portability of the device is enhanced. Buffer tank 4 is the cylinder jar body, connects liquid inlet line 3 and test coil pipe 5 on buffer tank 4 when, should reduce the contained angle on pipeline and jar body surface as far as possible, realizes the rotatory flow of liquid in the buffer tank, reduces pressure loss and promotes buffering effect. Optimally, the test coil 5 and the buffer tank 4 are in tangential penetration, and the liquid inlet pipeline 3 and the buffer tank 4 are in tangential penetration.
The butterfly valve that is located the fracturing blender truck is as master switch, whether control fracturing fluid flows into detection device, and it has flow control valve 2 to insert in the feed liquor pipeline 3, through the aperture size of control flow control valve, adjusts the fracturing fluid flow who gets into test coil 5.
The tank bottom of buffer tank 4 has the blowdown mouth, is provided with blowoff valve 6 and is connected with blowdown pipeline 7 on the blowdown mouth, can fully empty the jar after the use and remain, reduces device corrosion rate and device weight.
The bending friction resistance of the test coil 5 is more accurately obtained through indoor laboratory checking, and the test coil pipeline and the test pipeline of the indoor friction resistance instrument are identical in size design, and are 10mm in inner diameter and 3.2m in length.
A testing method of an online fracturing fluid friction resistance detection device is characterized in that a differential pressure sensor is used for acquiring the differential pressure between the inlet end and the outlet end of a testing coil pipe, a flow sensor is used for acquiring real-time flow data, and the real-time friction resistance and the resistance reduction performance of fracturing fluid are calculated through a pressure drop method according to flow-differential pressure series data acquired by the flow sensor and the differential pressure sensor.
Before testing, clear water and the same fracturing fluid are respectively used for carrying out two groups of experiments to obtain basic calculation data; respectively measuring the friction resistance by clear water variable displacement of a straight pipe friction resistance instrument with the indoor inner diameter of 10mm and the length of 3.2m, and measuring the friction resistance by fracturing fluid variable displacement of a straight pipe friction resistance instrument with the indoor inner diameter of 10mm and the length of 3.2 m; the on-line detection device tests the variable displacement friction resistance of the coil pipe with the inner diameter of 10mm and the length of 3.2m and carries out the displacement-friction resistance F(Water clear, straight tube)、F(fracturing fluid, straight pipe)、 F(fracturing fluid, coiled pipe)And fitting a formula.
The bending friction resistance of the fracturing fluid tested by the online detection device is as follows:
F(bending)＝F(fracturing fluid, coiled pipe)-F(fracturing fluid, straight pipe)；
The friction resistance of the fracturing fluid along the way when the online detection device is applied on site is as follows:
F(on the way)＝F’(fracturing fluid, coiled pipe)-F(bending)；
The resistance reduction rate of the fracturing fluid when the online detection device is applied on site is as follows:
the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a fracturing fluid friction hinders on-line measuring device which characterized in that: including test coil pipe (5), the inlet end of test coil pipe (5) connects fracturing blender truck export end connector (1) through feed liquor pipeline (3), the exit end of test coil pipe (5) connects fracturing blender truck entry end connector (12) through going out liquid pipeline (11), fracturing blender truck export end connector (1) and fracturing blender truck entry end connector (12) are connected respectively on the export and the entry of fracturing blender truck, form closed test circuit, it has flow sensor (8) to insert in liquid pipeline (11), be connected with pressure differential sensor between the inlet end of test coil pipe (5) and the exit end.
2. The on-line detection device for the friction resistance of the fracturing fluid according to claim 1, wherein: still include buffer tank (4), buffer tank (4) are connected between feed liquor pipeline (3) and test coil pipe (5), and the top of irritating of buffer tank (4) has the medium entry, the tank bottoms has the medium export, and feed liquor pipeline (3) meet with the medium entry, test coil pipe (5) and medium export.
3. The on-line detection device for the friction resistance of the fracturing fluid according to claim 2, wherein: and the buffer tank (4) is used as an axis, and the test coil (5) is spirally wound on the outer wall of the buffer tank (4).
4. The on-line detection device for the friction resistance of the fracturing fluid according to claim 2 or 3, wherein: and a flow control valve (2) is connected into the liquid inlet pipeline (3).
5. The on-line detection device of the friction resistance of the fracturing fluid according to claim 4, wherein: the buffer tank (4) is a cylindrical tank body, the test coil (5) and the buffer tank (4) are tangent to each other, and the liquid inlet pipeline (3) and the buffer tank (4) are tangent to each other.
6. The on-line detection device of the friction resistance of the fracturing fluid according to claim 5, wherein: the tank bottom of the buffer tank (4) is provided with a venting port, and the venting port is provided with a blow-down valve (6) and a blow-down pipeline (7).
7. The on-line detection device for the friction resistance of the fracturing fluid according to claim 1, wherein: the pipe diameters of the liquid inlet pipeline and the liquid outlet pipeline are larger than that of the test coil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122153441.3U CN216051251U (en) | 2021-09-07 | 2021-09-07 | Fracturing fluid friction resistance on-line measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122153441.3U CN216051251U (en) | 2021-09-07 | 2021-09-07 | Fracturing fluid friction resistance on-line measuring device |
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| CN216051251U true CN216051251U (en) | 2022-03-15 |
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| CN202122153441.3U Active CN216051251U (en) | 2021-09-07 | 2021-09-07 | Fracturing fluid friction resistance on-line measuring device |
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