CN112755892A - System and method for automatically and online adjusting viscosity of construction real-time water for fracturing - Google Patents
System and method for automatically and online adjusting viscosity of construction real-time water for fracturing Download PDFInfo
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- CN112755892A CN112755892A CN202011491424.4A CN202011491424A CN112755892A CN 112755892 A CN112755892 A CN 112755892A CN 202011491424 A CN202011491424 A CN 202011491424A CN 112755892 A CN112755892 A CN 112755892A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/213—Measuring of the properties of the mixtures, e.g. temperature, density or colour
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/2132—Concentration, pH, pOH, p(ION) or oxygen-demand
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/2136—Viscosity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
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Abstract
The invention belongs to the technical field of fracturing fluid addition, and discloses a system and a method for automatically adjusting viscosity of construction real-time water quality on line for fracturing, wherein the system comprises a central control unit, and a water quality monitoring unit, a viscosity monitoring unit and a fluid addition control unit which are respectively connected with the central control unit; the water quality monitoring unit is used for monitoring the water quality condition of liquid in the stirring tank of the sand mixing truck and sending the detected water quality detection data to the central control unit in real time; the viscosity monitoring unit is used for monitoring the viscosity condition of liquid in the stirring tank of the sand mixing truck and sending the detected viscosity data to the central control unit in real time; the liquid adding control unit comprises a conveying mechanism communicated between the chemical tank and the sand mixing truck stirring tank; and the central control unit adjusts the filling condition of the filling pipe for filling the medicament into the mixing tank of the sand mixing truck through the liquid filling control unit according to the received water quality detection data and viscosity data. The invention can accurately adjust the viscosity of the construction liquid in real time.
Description
Technical Field
The invention relates to the technical field of fracturing fluid addition, in particular to a system and a method for automatically adjusting viscosity of construction real-time water quality on line for fracturing.
Background
In the field of oil and gas reservoir production increase, fracturing refers to a method for forming cracks on oil and gas layers by utilizing the hydraulic action in the oil and gas production process. Fracturing artificially fractures a stratum, improves the flowing environment of oil in the underground, increases the yield of an oil well, and plays an important role in improving the flowing condition of the bottom of the oil well, slowing down the interlamination and improving the oil layer utilization condition.
The fracturing fluid is a working fluid in the fracturing process and mainly plays roles in reducing friction resistance, transmitting pressure, carrying a propping agent and the like in the fracturing process. Therefore, the performance of the fracturing fluid meeting the requirements is the basis for ensuring the smooth implementation of the fracturing process. A sand mixer truck is a device for mixing fracturing fluid and propping agent according to a certain proportion in the fracturing construction process. Most of fracturing fluids in the fracturing process need to be prepared in advance through devices such as a sand mixer truck in advance, and the prepared fracturing fluids are stored in a liquid storage tank. In order to ensure that the fracturing fluid meets the fracturing requirement, the prepared fluid is required to be detected in the process of preparing the fracturing fluid so as to meet the fracturing requirement, and the performance change of the fracturing fluid is required to be monitored at any time after the preparation of the fracturing fluid is finished so as to avoid the condition that the fracturing fluid is deteriorated along with the increase of the standing time.
However, the liquid performance of the fracturing fluid is greatly influenced by data such as mineral ion concentration and pH of water for liquid preparation, and the overall performance of the fracturing fluid is greatly influenced by the change of the flowback fluid in the fracturing process of recycling the flowback fluid.
At present, unconventional oil gas development gradually forms a volume fracturing process mainly comprising large discharge capacity and large liquid amount, liquid discharged back after fracturing is gradually increased along with large-scale development of each block, recycling of the back-flowing liquid in the subsequent well fracturing development process becomes a main treatment way at present, but the content of various ions in the back-flowing liquid of the stratum after fracturing is high, the quantity and the types of the ions contained in the liquid discharged back according to different stratum environments and different time are not fixed, the influence of various ions on the back-flowing liquid is very large, and the influence degree of the back-flowing liquid is uncertain due to the uncertainty of various ions. On the basis, in order to ensure the performance of the fracturing fluid, the liquid additive needs to be accurately adjusted according to the water quality of the flow-back fluid. And the current fracturing technology also needs to change the liquid performance in the construction process in time to meet complex working conditions. However, the prior advanced liquid preparation process cannot accurately adjust the viscosity of the construction liquid in real time, so that the problems of limited adjustment range and untimely adjustment of the performance of the construction liquid exist.
Disclosure of Invention
The invention aims to solve the problem that the adjustment range of the fracturing fluid is limited because the viscosity of the construction fluid cannot be accurately adjusted in real time in the process of pre-configuration of the conventional fracturing fluid.
In order to solve the above problems, the following solutions are provided:
the system for automatically adjusting the viscosity of the construction real-time water quality on line for fracturing comprises a central control unit, and a water quality monitoring unit, a viscosity monitoring unit and a liquid adding control unit which are respectively connected with the central control unit;
the water quality monitoring unit is used for monitoring the water quality condition of liquid in the mixing tank of the sand mixing truck and sending detected water quality detection data to the central control unit in real time;
the viscosity monitoring unit is used for monitoring the viscosity condition of liquid in the stirring tank of the sand mixing truck and sending the detected viscosity data to the central control unit in real time;
the liquid adding control unit comprises a conveying mechanism communicated between the chemical tank and the mixing tank of the sand mixing truck, and the conveying mechanism comprises a filling pipe communicated with the chemical tank; the filling pipe is connected between the chemical tank and the mixing tank of the sand mixing truck, and is used for filling the chemicals in the chemical tank into the mixing tank of the sand mixing truck;
the central control unit is internally preset with a viscosity concentration relation and a designed viscosity; the central control unit obtains theoretical filling concentration according to the received water quality detection data and the viscosity data, and the central control unit adjusts the filling pipe through the liquid filling control unit to fill the medicament into the sand mixing truck stirring tank according to the theoretical filling concentration.
The invention has the advantages that:
through this system, the liquid viscosity condition in can real-time supervision fracturing blender truck agitator tank guarantees that fracturing fluid can satisfy the construction demand, adds the automatic filling that the control unit realized the medicament through liquid, and can effectively guarantee the accurate control of the automatic filling of medicament through viscosity monitoring unit's real-time feedback.
More importantly, the agents can be directly filled into the mixing tank of the sand mixing truck through the conveying structures such as the filling pipe, the large storage tank, the site, the personnel, the equipment and the power required by the preparation of the fracturing fluid in advance in a construction site are reduced, and the fracturing construction operation is greatly simplified.
According to the scheme, the viscosity of the construction liquid can be accurately adjusted in real time, the adjustment range of the performance of the fracturing liquid is not limited any more, and the viscosity of the fracturing liquid can be adjusted better so as to meet the construction requirement better.
Further, the water quality monitoring unit comprises an ion detection probe arranged in a stirring tank of the sand mixing truck.
The ion detection probe is directly installed in the mixing tank of the sand mixing truck, so that the real-time detection is conveniently carried out on the water quality condition of the liquid in the mixing tank.
Further, the water quality detection data comprises various ion concentrations and liquid pH values.
The concentration of various ions and the PH value of the liquid are basic parameters for judging the water quality condition.
Further, the viscosity monitoring unit comprises a viscosity detection probe arranged in a stirring tank of the sand mixing truck.
The actual viscosity of the liquid in the stirring tank is detected by a viscosity detecting probe installed in the stirring tank.
Further, the viscosity data is a liquid viscosity value.
And the viscosity value of the transmitted liquid is detected in real time, so that the filling speed and the filling time can be accurately controlled.
Further, the conveying structure of the liquid adding control unit also comprises a displacement pump communicated with the filling pipe; a flowmeter is arranged on the filling pipe; the displacement pump and the flowmeter are in communication connection with the central control unit; the central control unit judges the filling rate and the filling concentration of the medicament filled in the filling pipe through the current flow fed back by the flowmeter, and adjusts the filling rate of the medicament by adjusting the rotating speed of the displacement pump.
In the liquid adding control unit, the filling rate of the medicament in the filling pipe is adjusted through the volumetric pump, and the central control unit can adjust the filling rate of the medicament through accurately adjusting the rotating speed of the volumetric pump through the real-time feedback of the flowmeter so as to achieve the required filling concentration.
The invention also provides a method for automatically adjusting the viscosity of the construction real-time water quality on line for fracturing, which comprises the following steps:
step one, detecting the water quality condition of liquid in a stirring tank of a sand mixing truck through a water quality monitoring unit, and sending water quality detection data to a central control unit;
step two, the central control unit selects a current viscosity-concentration relation suitable for the current water quality condition from a plurality of prestored viscosity-concentration relations according to the received water quality detection data and the preset design viscosity;
detecting the viscosity condition of the liquid in the stirring tank of the sand mixing truck through a viscosity monitoring unit, and sending the viscosity data to a central control unit in real time;
step four, the central control unit substitutes the received water quality detection data, the viscosity data and the pre-stored designed viscosity into the current viscosity concentration relation to calculate the theoretical filling concentration;
and step five, the central control unit injects the medicament into the mixing tank of the sand mixing truck according to the theoretical injection concentration control liquid adding control unit.
The method has the advantages that:
the system for automatically adjusting the viscosity of the fracturing fluid in real time in online by utilizing the construction real-time water quality can be used for completing automatic filling and accurate control of the medicament, so that the fracturing fluid in the mixing tank of the sand mixer truck is monitored in real time in the filling process, the whole medicament adding process is accurate and controllable, and the formed fracturing fluid can meet the construction requirements. In addition, by adopting the method, the steps of pre-configuration are saved, so that the labor and the storage device are greatly saved, and the whole construction operation is more convenient.
And further, the liquid adding control unit comprises a volumetric pump and a flowmeter, and in the fifth step, the central control unit controls the rotating speed of the volumetric pump through the current flow fed back by the flowmeter and the viscosity data received in real time.
The filling rate of the medicine in the filling pipe and even in the whole conveying mechanism is adjusted through the rotation speed change control of the volumetric pump, and the current flow is fed back through the flowmeter, so that the central control unit can adjust the rotation speed of the volumetric pump in time, and the adjusted filling rate can meet the requirement.
Further, the water quality detection data in the first step comprises various ion concentrations and the pH value of the liquid.
And detecting the ion concentration of various ions and the pH value of the liquid according to the actual liquid condition.
Further, in the second step, the central control unit selects a corresponding viscosity-concentration relation as a current viscosity-concentration relation according to the number of detected ions in the water quality detection data.
The viscosity concentration relationship of the liquid is different according to the ions contained in the liquid.
Drawings
Fig. 1 is a logic block diagram of a system for real-time automatic on-line viscosity adjustment of water quality in a fracturing construction according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a filling pipe according to a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a cueing tube in the second embodiment of the invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a main pipe 1, a branch pipe 2, a first port 101, a second port 102, a one-way valve 201, a prompting pipe 3, a fixing ring 301, a baffle 302 and a reed 303.
Example one
The embodiment is basically as shown in the attached figure 1: the system for automatically adjusting the viscosity of construction real-time water quality on line for fracturing comprises a central control unit, and a water quality monitoring unit, a viscosity monitoring unit and a liquid addition control unit which are respectively connected with the central control unit; wherein the water quality monitoring unit, the viscosity monitoring unit and the liquid adding control unit are all installed on the sand mixing truck.
The central control unit comprises a central processor with calculation processing capacity and a memory connected with the central processor and having a storage function.
And the water quality monitoring unit comprises an ion detection probe extending into the stirring tank of the sand mixing truck, and the ion detection probe is electrically connected with the PLC control cabinet. And the ion detection probe is used for detecting the ion concentration and the pH value of the liquid in the stirring tank.
And the viscosity monitoring unit comprises a viscosity detection probe extending into the stirring tank of the sand mixing truck, and the viscosity detection probe is electrically connected with the PLC control cabinet. And the viscosity detection probe is used for detecting the viscosity value of the liquid in the stirring tank.
Liquid adds the control unit, including the medicament case that is used for placing the medicament, be arranged in drawing the medicament from the medicament case and carry the volumetric pump in the agitator tank with the medicament, the intercommunication has the filling pipeline between volumetric pump and the agitator tank, installs the flowmeter that is used for detecting medicament filling speed on the filling pipeline, and flowmeter and volumetric pump all are connected with microcontroller, and microcontroller is connected with the central processing unit in the PLC switch board. The microcontroller is generally a common singlechip, and the central processing unit in the PLC control cabinet is generally a general integrated circuit chip with programmable logic processing capability.
As shown in figure 2, the filling pipe in the scheme has a special structure and comprises a main pipe 1 and a branch pipe 2 which is welded on the main pipe 1 in an inclined mode and communicated with the main pipe 1, wherein a one-way valve 201 which only allows the medicine to flow into the main pipe 1 from the branch pipe 2 is installed on the branch pipe 2, the included angle between the axis of the branch pipe 2 and the axis of the main pipe 1 ranges from 30 degrees to 60 degrees, and the included angle is optimal when the included angle is 45 degrees. Two ports of the main pipe 1 are respectively a first port 101 communicated with the positive displacement pump and a second port 102 communicated with the stirring tank, and external threads are arranged on the first port 101 and the second port 102 so as to be in threaded connection with other pipeline structures.
In this embodiment, the medicament in the medicament container is a commonly used emulsion resistance reducer. Through the liquid adding control unit, the emulsion resistance reducing agent is directly added into a liquid inlet flow pipeline of the sand mixer on line and then enters the mixer truck through the displacement pump and the filling pipe in the fracturing construction process, the agent is contacted with water to swell and rise viscosity, and the agent is fully stirred in the mixer truck along with the flow to carry out on-line liquid preparation.
When the system is adopted for fracturing and the viscosity is automatically adjusted on line by using the construction real-time water quality, firstly, the current water quality condition in the mixing tank of the sand mixing truck is monitored by the water quality monitoring unit, namely, the system is installedDetecting various ion concentrations and pH values of water by an ion detection probe with proper height in a mixing tank of a sand mixing truck, specifically detecting K, Na, mg and cl ions as ions to be detected, and detecting nk、nna、nCa、nmg、nclAfter pH, converting digital signals into analog current signals through a common digital-to-analog converter connected with an ion probe, transmitting the analog current signals back to a PLC automatic control box, presetting and updating a relational formula with concentration and viscosity in real time in a central processing unit of the PLC automatic control box, and designing viscosity mu required to meet fracturing construction requirements1，Design viscosity mu according to setting requirements1Calculating the required filling concentration C under the water quality1。
Then, the liquid addition control unit adds the concentration C according to the calculated required addition concentration1The agent is extracted from the agent box through the displacement pump and then is filled into the mixing tank of the sand mixing truck through the filling pipe.
In the medicament filling process, the volume pump is controlled by the PLC automatic control box to complete the medicament filling process. The PLC control box brings the ion concentration of each ion in the water quality detection data into a formula of ion concentration and designed viscosity according to the water quality detection data received from the water quality monitoring unit, and calculates the filling concentration C1Combined with actual construction displacement VConstruction ofData converted into the required filling rate V of the added medicament1(V 1＝C1VConstruction of) The PLC automatic control box sends the filling rate to the displacement pump, and the rotating speed of the displacement pump is changed to the filling rate V by a frequency converter on the displacement pump1And finishing the first step of pumping operation. Meanwhile, the PLC automatic control box controls the filling concentration by receiving the feedback flow of the flowmeter and comparing the feedback flow with the preset set flow in the PLC automatic control box and controlling the difference value of the feedback flow and the set flow.
Finally, in the process of adding the medicament, the actual viscosity of the liquid formed after the medicament is continuously added into the liquid in the stirring tank is detected through the on-line viscosity of the viscosity monitoring unit, and particularly, the actual viscosity mu of the current liquid is monitored in real time through a viscosity detection probe arranged in the stirring tank of the sand mixing truckPractice of. Then the meridian and the adhesiveThe analog-to-digital converter connected with the viscosity detection probe converts the viscosity data into an analog current signal and transmits the analog current signal back to the PLC automatic control box, and the central processing unit compares the actual viscosity muPractice ofAnd the design viscosity mu1When the two are equal, the operation of the liquid addition control unit for filling the medicine into the stirring tank is stopped.
The filling rate V is detected by a viscosity detection probe1Lower real time viscosity muPractice ofThen transmitted back to the PLC automatic control box to calculate the viscosity error deltaμ＝μPractice of-μ1If deltaμAnd the PLC automatic control box controls the volumetric pump to reduce the filling rate through signal transmission, and then detects the viscosity of the liquid filled with the medicament through the viscosity detection probe. If deltaμEqual logic increases the drug fill rate by ≦ 1. The procedure is carried out until-1. ltoreq. deltaμUntil the concentration is less than or equal to 1.
The three steps are mutually matched and cooperated, and the automatic control of the addition of the medicament is realized according to the designed viscosity and the real-time detection of the water quality concentration and the PH value.
Wherein, in the PLC automatic control case, the relation formula of concentration and viscosity is according to under the combined action of water quality monitoring unit and viscosity monitoring unit, and the PLC automatic control case generates and real-time update according to current water quality monitoring data:
firstly, in an integrated circuit chip of a PLC automatic control box, an initial data set is established according to the relation between the concentration of a normal distillation underwater medicament and the viscosity of liquid, and the influence relation between the concentration and the pH value of different ions (potassium, sodium, calcium, magnesium ions, iron and chlorine plasmas) in water on the viscosity of fracturing fluid.
Firstly, testing the relation between the concentration and the viscosity of a medicine in pure water, and establishing a relational expression of the concentration and the viscosity;
TABLE 1
| Concentration of% | 0.04 | 0.06 | 0.08 | 0.1 | 0.12 | 0.14 | 0.16 | 0.18 | 0.2 | 0.25 | 0.3 | 0.35 | 0.4 |
| Viscosity, mpas | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 26 | 28 |
From the corresponding data in Table 1, a concentration-viscosity relationship, μ0An + b; (formula one)
Then, several key medicament concentration-viscosity points are selected, and the influence of different concentrations and pH values of potassium, sodium, calcium, magnesium, iron and the like on the viscosity of the liquid is tested under the points respectively. Tables 2-6 below are the residual viscosities after the liquid impact at the on-site conventional concentration of the other ions at 0.1% liquid concentration, 0ppm other ion content, and pH 7. Table 7 shows the viscosity of the liquids at different pH values without mineral ions.
Table 2 shows the effect of potassium ion concentration on viscosity, table 3 shows the effect of sodium ion concentration on viscosity, table 4 shows the effect of calcium ion concentration on viscosity, table 5 shows the effect of magnesium ion concentration on viscosity, table 6 shows the effect of iron ion concentration on viscosity, and table 7 shows the effect of pH on viscosity.
TABLE 2
TABLE 3
TABLE 4
TABLE 5
TABLE 6
TABLE 7
| pH | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Viscosity of the oil(mpas) | 9.5 | 9.6 | 9.6 | 9.8 | 9.8 | 10.0 | 10.0 | 10.0 | 9.1 | 7.6 | 3.9 | 2.3 | 1.6 | 1.4 |
From the test data in Table 2, the concentration-viscosity relationship under the combined action of various ions and ph can be obtained:
final viscosity of mu1＝(a1nk++a2nNa++a3nCa2++a4nmg2++a5nFe3++a6pH)μ0(ii) a (formula II)
And determining the required filling concentration according to different design viscosities and the tracking analysis result of the online water quality monitoring part on the ion content type and concentration condition of the construction water quality in the construction process. The liquid adding control unit adjusts the volumetric pump to automatically add the medicament on line. And then, the viscosity condition of the liquid after the medicament is added is monitored on line in real time through a viscosity monitoring unit, the liquid is fed back to a central control unit according to the measured actual viscosity, the liquid addition control unit is controlled through the central control unit, the filling rate of the medicament is adjusted by adjusting the rotating speed of a displacement pump, and the fracturing fluid in the mixing tank of the sand mixer truck is automatically adjusted to reach the required construction viscosity.
Compared with the prior art, the filling pipe structure of this scheme through the design realizes the online filling of emulsion resistance-reducing agent to the fracturing blender truck, and the emulsion resistance-reducing agent adds the back through the automatic inlet liquid flow to the fracturing blender truck agitator tank of the automatic system of adjusting viscosity on line of real-time quality of water of construction for the fracturing to and online thoughtlessly join in marriage that the power of mixing with sand agitator tank self stirring goes on, reduce the required large-scale storage tank of job site confession fracturing fluid in advance, place, personnel, equipment and power.
This scheme adds the control unit through liquid and water quality monitoring unit, viscosity monitoring module three linkage design, realizes the accurate regulation of emulsion resistance reducer filling, can realize fracturing fluid viscosity calibration automatically, and timely accurate control liquid performance makes whole fracturing work progress safe and reliable, improves the efficiency of construction.
Example two
In this embodiment, the port of the branch pipe 2 is provided with a prompt pipe 3. Open on the lateral surface of the port tip of branch pipe 2 has the external screw thread, and warning pipe 3 is the tubular structure, and it has the internal thread to open on the 3 one end mouths of tubes of warning pipe, and this mouth of tubes and 2 tip threaded connection of branch pipe, and it has the internal thread to open again to have the external screw thread on the other end mouth of tubes of warning pipe 3, and the convenience can with chemical tank threaded connection.
As shown in fig. 3, a sound amplifying cavity protruding outwards to form a cavity structure is formed in the wall of the cue tube 3, a fixing ring 301 is embedded in the orifice of the sound amplifying cavity, a plurality of blocking pieces 302 arranged radially are hinged to the fixing ring 301, one end of each blocking piece 302 extends into the cue tube 3 and is used for contacting with a medicament flowing through the cue tube 3, the other end of each blocking piece 302 extends into the sound amplifying cavity, and a plurality of reeds 303 capable of shaking are connected to the orifice of the sound amplifying cavity through screws. When a medicament enters the branch pipe 2 through the prompting pipe 3, the medicament is in contact with the baffle plate 302, the baffle plate 302 is hinged to the fixing ring 301, one end of the baffle plate 302 is stamped by the medicament, the baffle plate 302 swings, relative motion is generated between the baffle plate 302 and the reed 303, an action of knocking the reed 303 is formed, the reed 303 vibrates to generate sound, the sound is amplified through the sound amplifying cavity, the prompting pipe 3 generates sound to prompt the condition of filling the medicament when the medicament is filled, the filling speed is higher, the sound frequency is higher, otherwise, the sound frequency is low, the current filling speed can be intuitively prompted for an operator, and the filling operation can be accurately completed by the operator.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. The system for automatically adjusting the viscosity of construction real-time water quality on line for fracturing is characterized by comprising a central control unit, and a water quality monitoring unit, a viscosity monitoring unit and a liquid adding control unit which are respectively connected with the central control unit;
the water quality monitoring unit is used for monitoring the water quality condition of liquid in the mixing tank of the sand mixing truck and sending detected water quality detection data to the central control unit in real time;
the viscosity monitoring unit is used for monitoring the viscosity condition of liquid in the stirring tank of the sand mixing truck and sending the detected viscosity data to the central control unit in real time;
the liquid adding control unit comprises a conveying mechanism communicated between the chemical tank and the mixing tank of the sand mixing truck, and the conveying mechanism comprises a filling pipe communicated with the chemical tank; the filling pipe is connected between the chemical tank and the mixing tank of the sand mixing truck, and is used for filling the chemicals in the chemical tank into the mixing tank of the sand mixing truck;
the central control unit is internally preset with a viscosity concentration relation and a designed viscosity; the central control unit obtains theoretical filling concentration according to the received water quality detection data and the viscosity data, and the central control unit adjusts the filling pipe through the liquid filling control unit to fill the medicament into the sand mixing truck stirring tank according to the theoretical filling concentration.
2. The system for automatically adjusting the viscosity of the constructed real-time water quality on line for fracturing as claimed in claim 1, wherein the water quality monitoring unit comprises an ion detection probe arranged in a stirring tank of a sand mixing truck.
3. The system for real-time automatic on-line viscosity adjustment of water quality in construction for fracturing as claimed in claim 2, wherein said water quality detection data comprises a plurality of ion concentrations and liquid PH values.
4. The system for automatically adjusting the viscosity of the constructed real-time water quality on line for fracturing as claimed in claim 2, wherein the viscosity monitoring unit comprises a viscosity detection probe arranged in a stirring tank of a sand mixing truck.
5. The system for real-time automatic on-line viscosity adjustment of water quality in construction for fracturing as claimed in claim 4, wherein the viscosity data is a liquid viscosity value.
6. The system for automatically adjusting the viscosity of the constructed real-time water quality on line for fracturing as claimed in claim 1, wherein the transmission structure of the liquid adding control unit further comprises a volumetric pump communicated with the filling pipe; a flowmeter is arranged on the filling pipe; the displacement pump and the flowmeter are in communication connection with the central control unit; the central control unit judges the filling rate and the filling concentration of the medicament filled in the filling pipe through the current flow fed back by the flowmeter, and adjusts the filling rate of the medicament by adjusting the rotating speed of the displacement pump.
7. The method for automatically adjusting the viscosity of construction real-time water quality on line for fracturing is characterized by comprising the following steps of:
step one, detecting the water quality condition of liquid in a stirring tank of a sand mixing truck through a water quality monitoring unit, and sending water quality detection data to a central control unit;
step two, the central control unit selects a current viscosity-concentration relation suitable for the current water quality condition from a plurality of prestored viscosity-concentration relations according to the received water quality detection data and the preset design viscosity;
detecting the viscosity condition of the liquid in the stirring tank of the sand mixing truck through a viscosity monitoring unit, and sending the viscosity data to a central control unit in real time;
step four, the central control unit substitutes the received water quality detection data, the viscosity data and the pre-stored designed viscosity into the current viscosity concentration relation to calculate the theoretical filling concentration;
and step five, the central control unit injects the medicament into the mixing tank of the sand mixing truck according to the theoretical injection concentration control liquid adding control unit.
8. The method for automatically adjusting the viscosity of the construction real-time water quality on line for fracturing as claimed in claim 7, wherein the liquid adding control unit comprises a volumetric pump and a flow meter, and in step five, the central control unit controls the rotation speed of the volumetric pump through the current flow fed back by the flow meter and the viscosity data received in real time.
9. The method for real-time automatic on-line viscosity adjustment of water quality in construction for fracturing as claimed in claim 7, wherein the water quality detection data in the first step comprises various ion concentrations and pH values of the liquid.
10. The method for real-time automatic on-line viscosity adjustment of water quality in construction for fracturing as claimed in claim 9, wherein in step two, the central control unit selects a corresponding viscosity-concentration relationship as the current viscosity-concentration relationship according to the number of ions detected in the water quality detection data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011491424.4A CN112755892A (en) | 2020-12-16 | 2020-12-16 | System and method for automatically and online adjusting viscosity of construction real-time water for fracturing |
Applications Claiming Priority (1)
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