CN112302610A - Electrically-driven fracturing unit, system and control method - Google Patents
Electrically-driven fracturing unit, system and control method Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
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Abstract
The invention relates to an electrically driven fracturing unit, a system and a control method; the electrically driven fracturing unit, it includes: the fracturing prying component at least comprises a variable-frequency fracturing pry and a fixed-frequency fracturing pry; the fixed-frequency fracturing pry is communicated with a power supply bus; one end of the frequency conversion system is communicated with the power supply bus, the other end of the frequency conversion system is communicated with the frequency conversion fracturing pry, and the current frequency of the frequency conversion fracturing pry is adjusted. Like this, replace through the fracturing sled of deciding frequently to reduce area and the price cost that the replacement part corresponds, and then solved current electricity and drive the too big and too high problem of cost of fracturing equipment area on the whole.
Description
Technical Field
The invention relates to the technical field of electrically-driven fracturing, in particular to an electrically-driven fracturing unit, an electrically-driven fracturing system and a control method.
Background
In the global oil and gas field operation site, the electric-drive fracturing pry is widely applied to places with perfect electric power equipment. The existing electrically-driven fracturing equipment is driven by adopting a mode of arranging a variable frequency motor in order to adjust the rotating speed and the displacement of the fracturing pry, and the rotating speed and the displacement of the fracturing pry are controlled by controlling the change of frequency.
However, although the frequency conversion control mode can flexibly adjust the rotating speed and the displacement of the fracturing pry, in terms of hardware, each fracturing pry needs to be provided with a frequency converter, and the existing frequency converters at least occupy an area of 15 square meters and have a selling price of more than 300 thousands. This is an excessive footprint and cost for existing electrically driven fracturing equipment.
Disclosure of Invention
To solve at least one aspect of the above technical problems in a certain extent, the present invention provides an electrically driven fracturing unit, comprising: the fracturing prying component at least comprises a variable-frequency fracturing pry and a fixed-frequency fracturing pry; the fixed-frequency fracturing pry is communicated with a power supply bus; one end of the frequency conversion system is communicated with the power supply bus, the other end of the frequency conversion system is communicated with the frequency conversion fracturing pry, and the current frequency of the frequency conversion fracturing pry is adjusted.
Like this, replace through the fracturing sled of deciding frequently to reduce area and the price cost that the replacement part corresponds, and then solved current electricity and drive the too big and too high problem of cost of fracturing equipment area on the whole.
Optionally, the total rated power of the fixed-frequency fracturing pry in the fracturing pry assembly is 1/3-2/3 of the total rated power of the fracturing pry assembly, or
The number of the fixed-frequency fracturing prys in the fracturing pry component is 0.5-2 times that of the variable-frequency fracturing prys.
Therefore, the occupied area and the price cost of the frequency converter can be saved, and the problems of the occupied area and the price cost are further solved.
Optionally, the total rated power of the fixed-frequency fracturing pry in the fracturing pry assembly is 1/2 of the total rated power of the fracturing pry assembly, or
The quantity of the fixed-frequency fracturing prys in the fracturing pry component is the same as that of the variable-frequency fracturing prys.
Therefore, the occupation proportion of the frequency conversion fracturing pry can be reduced to the maximum extent under the condition of ensuring the total power range of the fracturing pry component, and the occupied area and the price cost are saved to the maximum extent, so that the problems of the occupied area and the price cost are further solved.
Optionally, the rated power of the fixed-frequency fracturing pry in the fracturing pry assembly falls within the total power range of the variable-frequency fracturing pry.
In this way, the total power range of the frac sled assembly can be made to cover all of the power, thereby avoiding omissions due to incomplete coverage.
Optionally, in the fracturing sled subassembly the quantity of constant frequency fracturing sled is a plurality of, the quantity of frequency conversion fracturing sled is one or two, and at least one the rated power of constant frequency fracturing sled falls into the total power scope of frequency conversion fracturing sled.
Therefore, only one or two frequency conversion fracturing prys are used, so that the using quantity of frequency converters is greatly reduced on the basis of ensuring the coverage rate of the total power range of the fracturing pry assembly, and the occupied area and the price cost are greatly reduced.
Optionally, the frequency conversion fracturing sled/the constant frequency fracturing sled comprises a driving motor and a fracturing pump, and the driving motor drives the fracturing pump.
Therefore, the driving motor provides driving force to drive the fracturing pump to work, and fracturing work is completed.
Optionally, the fracturing pump is a plurality of, frequency conversion fracturing sled/decide frequency fracturing sled still includes the transfer case, driving motor passes through the transfer case and is a plurality of the fracturing pump is connected, the transfer case will driving motor's power distribution is a plurality of at most the fracturing pump.
Therefore, a plurality of connected fracturing pumps can be driven to work through the transfer case by one driving motor; the transfer case distributes the power of the driving motor to each connected fracturing pump to drive the fracturing pump to work normally.
Optionally, in the variable frequency fracturing pry/the fixed frequency fracturing pry, the number of the driving motors is one.
Optionally, the frequency conversion system includes a frequency converter, the frequency converter with the frequency conversion fracturing sled is connected.
Therefore, the frequency converter in the frequency conversion system is directly connected with the driving motor in the frequency conversion fracturing pry, and the frequency of the alternating current flowing into the driving motor is adjusted, so that the running power of the driving motor is adjusted.
Optionally, one frequency converter is connected with two or three frequency conversion fracturing prys.
In this way, the frequency converters of two or three frequency conversion fracturing prys can be integrated together in an integrated mode, and therefore the occupied area and the price cost of the frequency converters are reduced.
Another object of the present invention is to provide an electrically driven fracturing system, which includes the electrically driven fracturing unit as described above and a generator set, wherein the generator set is communicated with the electrically driven fracturing unit through the power supply bus.
Like this, replace through the fracturing sled of deciding frequently to reduce area and the price cost that the replacement part corresponds, and then solved current electricity and drive the too big and too high problem of cost of fracturing equipment area on the whole.
Another object of the present invention is to provide an electric drive fracturing unit control method, which includes:
after the electrically-driven fracturing unit is electrified, acquiring predicted working power, rated power of each constant-frequency fracturing pry and power range of each variable-frequency fracturing pry;
determining the constant-frequency fracturing pry to be started and starting the constant-frequency fracturing pry according to the predicted working power and the rated power of the constant-frequency fracturing pry;
acquiring operating parameters of the electrically-driven fracturing unit;
increasing the operating power of the variable-frequency fracturing pry one by one according to the operating parameters and the power range of the variable-frequency fracturing pry until the operating parameters meet the construction requirements;
and counting the operating power of each frequency conversion fracturing pry, and carrying out equal proportion distribution on the total operating power of the frequency conversion fracturing prys according to the maximum power of the power range of each frequency conversion fracturing pry.
Therefore, the mode of starting the fixed-frequency fracturing pry and then starting the variable-frequency fracturing pry can be adopted; on one hand, the operation parameters can finally reach the construction requirements, and on the other hand, the current impact influence between fixed-frequency starting and variable-frequency starting can be avoided.
Optionally, the counting of the operating power of each frequency conversion fracturing pry, and performing equal proportion distribution on the total operating power of the frequency conversion fracturing pry according to the maximum power of the power range of each frequency conversion fracturing pry includes:
counting the operating power of each variable-frequency fracturing pry;
calculating the total operating power of the variable-frequency fracturing prys according to the operating power of each variable-frequency fracturing pry;
determining the ratio of the maximum power of each frequency conversion fracturing pry according to the maximum power of the power range of each frequency conversion fracturing pry;
and redistributing the total operating power of the frequency conversion fracturing prys according to the ratio of the maximum power of each frequency conversion fracturing pry.
In this way, after redistribution, any one of the variable frequency fracturing skids operates at the same proportion of its maximum power (thereby substantially reducing damage to the service life of the operating variable frequency fracturing skid.
Drawings
Fig. 1 is a block diagram of an electrically driven fracturing unit in accordance with an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electrically driven fracturing unit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an electrically driven fracturing system in accordance with an embodiment of the present invention;
fig. 4 is a flowchart of an electrically driven fracturing unit control method according to an embodiment of the present invention;
fig. 5 is a flowchart of steps 500 of a method for controlling an electrically driven fracturing unit according to an embodiment of the present invention.
Description of reference numerals:
1-a frac sled assembly; 11-a variable frequency fracturing skid 11; 12-fixed frequency fracturing pry; 13-a drive motor; 14-a fracturing pump; 15-a transfer case; 2-a frequency conversion system; 21-a frequency converter; 3-a power supply bus; 4-a generator set.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
If there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
It should be noted that, for the fracturing pry assembly and even the whole electrically-driven fracturing unit, the specific working capacity is described, and the specific working capacity is generally determined by the displacement or the power of the fracturing pry assembly or the electrically-driven fracturing unit, wherein the power is obtained by dividing the product of the displacement and the corresponding pressure by a coefficient. For ease of description and definition herein, power is used to define the operational capabilities of the frac sled assembly or the entire electrically driven fracturing unit. It is not intended that the present application disclaims the manner in which the operating capacity is defined or described by displacement or other operating parameter, whether by power or by a corresponding converted displacement or other operating parameter such as operating pressure, etc., as falling within the scope of the present invention.
As shown in fig. 1, it is a structural diagram of an electrically driven fracturing unit according to an embodiment of the present invention; referring to fig. 2, wherein the electrically driven fracturing unit includes: the fracturing pry component 1 comprises a variable-frequency fracturing pry 11 and a fixed-frequency fracturing pry 12; the fixed-frequency fracturing pry 12 is communicated with a power supply bus 3; one end of the frequency conversion system 2 is communicated with the power supply bus 3, the other end of the frequency conversion system is communicated with the frequency conversion fracturing pry 11, and the current frequency of the frequency conversion fracturing pry 11 is adjusted.
Therefore, alternating current is provided through the power supply bus 3, and fracturing work is completed through the fracturing pry assembly 1; to the fixed frequency fracturing sled 12 in fracturing sled subassembly 1, directly provide the alternating current of fixed frequency through power supply bus 3, to frequency conversion fracturing sled 11, the alternating current that power supply bus 3 provided adjusts the current frequency behind frequency conversion system 2, then provides frequency conversion fracturing sled 11 to supply frequency conversion fracturing sled 11 to carry out work.
Therefore, in the electrically-driven fracturing unit, a part of fracturing work is completed by replacing the fixed-frequency fracturing pry 12 with the variable-frequency fracturing pry 11, and the corresponding variable-frequency system 2 of the part can be correspondingly omitted, so that the occupied area and the price cost corresponding to the part are reduced; like this, replace through fixed frequency fracturing sled 12 to reduce area and the price cost that the replacement part corresponds, and then solved current electricity and drive the too big and too high problem of cost of fracturing equipment area on the whole.
In addition, the fixed-frequency fracturing pry 12 is used for replacing the variable-frequency fracturing pry 11, so that the number of intermediate links and wiring is reduced.
Optionally, the total rated power of the fixed frequency fracturing pry 12 in the fracturing pry assembly 1 is 1/3-2/3 of the total rated power of the fracturing pry assembly 1.
The fracturing pry assembly 1 comprises a plurality of fixed-frequency fracturing prys 12 and a plurality of variable-frequency fracturing prys 11; wherein each constant frequency frac sled 12 has its rated power, and each variable frequency frac sled 11 has its adjustable power range; the maximum power in the adjustable power range in the variable frequency frac sled 11 is considered herein as the rated power of the variable frequency frac sled 11.
Wherein, the total rated power of the fixed-frequency fracturing pry 12 is the sum of the rated powers of all the fixed-frequency fracturing prys 12; the total rated power of the variable frequency fracturing pry 11 is the sum of the rated powers (the maximum power in the adjustable power range) of all the variable frequency fracturing prys 11; the total rated power of the fracturing sled assembly 1 is the sum of the total rated power of the fixed-frequency fracturing sled 12 and the total rated power of the variable-frequency fracturing sled 11 in the fracturing sled assembly 1.
Therefore, compared with the variable-frequency fracturing pry 11, the fixed-frequency fracturing pry 12 can save the occupied area and the price cost of the frequency converter 21; setting the total rated power of the fixed frequency fracturing skid 12 to 1/3-2/3 of the total rated power of the fracturing skid assembly 1 means that the floor space and price cost of the frequency converter 21 of 1/3-2/3 can be saved, thereby further solving the problems of floor space and price cost.
Here, the case of the total power rating of the fixed frequency frac sled 12 and the total power rating of the frac sled assembly 1 needs to be explained. The fracturing pry component 1 comprises a fixed-frequency fracturing pry 12 and a variable-frequency fracturing pry 11, wherein the fixed-frequency fracturing pry 12 works according to rated power, and the variable-frequency fracturing pry 11 works in a regulating mode according to the range of 0-rated power. Here, when the selectable power of the whole fracturing sled assembly 1 is analyzed, we consider from two aspects of the fixed frequency fracturing sled 12 and the variable frequency fracturing sled 11:
firstly, considering the occupied area and the price cost, the more share of the total rated power of the fixed-frequency fracturing pry 12 is, the more frequency-variable fracturing prys 11 are replaced, and the more occupied area and the price cost can be saved; therefore, from the standpoint of floor space and price cost, the more share the total rated power of the fixed frequency fracturing skid 12 occupies, the better.
Secondly, the selectable power of the entire frac sled assembly 1 is considered based on the number of activations of fixed frequency frac sleds 12: for the sake of illustration, it is assumed that the rated power of all the fixed-frequency fracturing skids 12 is the same (the rated power is E), the number of the fixed-frequency fracturing skids 12 is n, the adjustable power range of all the variable-frequency fracturing skids 11 is the same (the maximum value of the adjustable range is F), and the number of the variable-frequency fracturing skids 11 is m: the number of openings of fixed frequency frac prys 12 is different and the total power range of the entire frac pry assembly 1 is also different. To facilitate further analysis, we calculated and counted the total power range of the frac sled assembly 1 with different numbers of fixed frequency frac sleds 12 activated, as follows:
from the above table we can see that E ≦ mF must be satisfied if the total power range of the frac sled assembly 1 can cover 0- (nE + mF); that is, the rated power of the fixed frequency frac sled 12 falls within the total power range of the variable frequency frac sled 11.
Finally, the above conclusion is analyzed on the premise that all the variable frequency fracturing skids 11 are started at the same time and the rated power of the fixed frequency fracturing skid 12 is the same. In the case that the rated power of the constant frequency fracturing pry 12 is not the same, the actual situation can be adjusted.
Optionally, the rated power of the fixed-frequency fracturing pry 12 in the fracturing pry assembly 1 falls within the total power range of the variable-frequency fracturing pry 11.
In this way, the total power range of the frac skid assembly 1 can be made to cover all powers (which are less than the maximum value in the total power range) thus avoiding omissions due to incomplete coverage (after omission, meaning that the frac skid assembly 1 cannot be adjusted to the power that is left to escape).
Optionally, the number of the fixed-frequency fracturing skids 12 in the fracturing skid assembly 1 is 0.5-2 times that of the variable-frequency fracturing skids 11.
Like this, the quantity relation of deciding frequency fracturing sled 12 and frequency conversion fracturing sled 11 in fracturing sled subassembly 1 is injectd from the quantity angle of fracturing sled to with some frequency conversion fracturing sled 11 replacement for deciding frequency fracturing sled 12, and then saved area and price cost.
Optionally, the total rated power of the fixed frequency fracturing pry 12 in the fracturing pry assembly 1 is 1/2 of the total rated power of the fracturing pry assembly 1.
Therefore, under the condition of ensuring the total power range of the fracturing pry component 1, the occupation proportion of the variable frequency fracturing pry 11 can be reduced to the maximum extent (considering the existence of one variable frequency fracturing pry 11 and one fixed frequency fracturing pry 12), and the occupied area and the price cost are further saved to the maximum extent, so that the problems of the occupied area and the price cost are further solved.
Optionally, the number of the fixed-frequency fracturing skids 12 in the fracturing skid assembly 1 is the same as that of the variable-frequency fracturing skids 11.
Like this, the quantity relation of constant frequency fracturing sled 12 and frequency conversion fracturing sled 11 in fracturing sled subassembly 1 is injectd from the quantity angle of fracturing sled to furthest (consider that there is the condition of a frequency conversion fracturing sled 11 and a constant frequency fracturing sled 12 to exist) changes frequency conversion fracturing sled 11 for constant frequency fracturing sled 12, and then has saved area and price cost.
Optionally, in the fracturing sled subassembly 1 the quantity of constant frequency fracturing sled 12 is a plurality of, the quantity of frequency conversion fracturing sled 11 is one, and at least one the rated power of constant frequency fracturing sled 12 falls into the total power scope of frequency conversion fracturing sled 11.
In this way, only one frequency conversion fracturing sled 11 is used, thereby greatly reducing the number of frequency converters 21 used on the basis of ensuring the coverage rate of the total power range of the fracturing sled assembly 1, and greatly reducing the occupied area and the price cost.
Optionally, in the fracturing sled subassembly 1 the quantity of constant frequency fracturing sled 12 is a plurality of, the quantity of frequency conversion fracturing sled 11 is two, and at least one the rated power of constant frequency fracturing sled 12 falls into the total power scope of frequency conversion fracturing sled 11.
The use of only one variable frequency fracturing sled 11 means that only one variable frequency fracturing sled 11 can be adjusted to achieve the preset power of the whole fracturing sled assembly 1; this means that the requirements for adjustment are strict and harsh, which are very disadvantageous for the workers and easily cause misoperation of the workers; on the basis, the number of the frequency conversion fracturing prys 11 is set to be two, so that the allowance and the fault tolerance rate of the frequency conversion fracturing unit in the control process are greatly increased, the number of the fixed frequency fracturing prys 12 is guaranteed to the maximum extent, and the occupied area and the price cost are greatly reduced.
Optionally, as shown in fig. 2, the variable frequency fracturing sled 11/the fixed frequency fracturing sled 12 includes a driving motor 13 and a fracturing pump 14, and the driving motor 13 drives the fracturing pump 14.
In this way, the driving motor 13 provides a driving force to drive the fracturing pump 14 to work, thereby completing the fracturing work.
It should be noted that the structures of the variable frequency fracturing pry 11/the fixed frequency fracturing pry 12 are the same, and the only difference is that the driving motor 13 in the variable frequency fracturing pry 11 is the variable frequency driving motor 13; and the driving motor 13 in the constant-frequency fracturing pry 12 is a constant-frequency driving motor 13.
Optionally, as shown in fig. 2, the number of the fracturing pumps 14 is multiple, the variable frequency fracturing pry 11/the fixed frequency fracturing pry 12 further includes a transfer case 15, the driving motor 13 is connected with the plurality of the fracturing pumps 14 through the transfer case 15, and the transfer case 15 distributes the power of the driving motor 13 to the plurality of the fracturing pumps 14.
Thus, a plurality of connected fracturing pumps 14 can be driven to work through the transfer case 15 by one driving motor 13; the transfer case 15 distributes the power of the driving motor 13 to each connected fracturing pump 14 to drive the fracturing pump 14 to work normally.
Optionally, as shown in fig. 2, in the variable frequency fracturing pry 11/the fixed frequency fracturing pry 12, the number of the driving motors 13 is one.
Optionally, as shown in fig. 2, the frequency conversion system 2 includes a frequency converter 21, and the frequency converter 21 is connected to the variable frequency fracturing pry 11.
In this way, the frequency converter 21 in the frequency conversion system 2 is directly connected with the driving motor 13 in the frequency conversion fracturing pry 11, and performs frequency regulation on the alternating current flowing into the driving motor 13, so as to regulate the running power of the driving motor 13.
Optionally, one frequency converter 21 is connected to two or three frequency conversion fracturing prions 11.
In this way, the frequency converters 21 of two or three frequency conversion fracturing skids 11 can be integrated together in an integrated manner, thereby reducing the occupied area and price cost of the frequency converters 21.
As shown in fig. 3, which is a schematic structural diagram of an electrically driven fracturing system of an embodiment of the present invention; wherein, electrically drive fracturing system, including as above-mentioned electrically drive fracturing unit and generating set 4, generating set 4 with electrically drive fracturing unit passes through power supply bus 3 intercommunication.
Like this, replace through fixed frequency fracturing sled 12 to reduce area and the price cost that the replacement part corresponds, and then solved current electricity and drive the too big and too high problem of cost of fracturing equipment area on the whole.
Fig. 4 is a flowchart of an electric drive fracturing unit control method according to an embodiment of the present invention; the control method of the electrically-driven fracturing unit is the control method of the electrically-driven fracturing unit, and comprises the following steps:
the predicted working power is the prediction of the possible working power of a design institute and the like during fracturing before the fracturing operation of the oil and gas field is carried out. The predicted working power is similar to the actual working power of the electrically-driven fracturing unit during fracturing, and the predicted working power and the actual working power are not completely the same due to the influence of actual conditions.
in this step, the method for determining the fixed-frequency fracturing pry 12 to be started is as follows: the sum of the rated powers of the screened fixed-frequency fracturing skids 12 to be started is as maximum as possible on the premise that the sum is smaller than the predicted working power.
The specific screening process can be determined according to actual conditions: for example, the screening is performed from top to bottom according to the rated power, or from bottom to top, or according to a preset sequence.
If one fixed-frequency fracturing pry 12 is screened, the sum of rated power of all screened fixed-frequency fracturing prys 12 is larger than the predicted working power; however, in the previous screening of the fixed-frequency fracturing pry 12, the sum of the rated power of all screened fixed-frequency fracturing prys 12 is smaller than the predicted working power; screening may be stopped at this point and the fixed frequency frac sled 12 may be abandoned.
Wherein the starting process of the fixed-frequency fracturing pry 12 to be started is soft starting; thus, the impact current generated when the fixed-frequency driving motor 13 is started can be reduced, and the equipment is protected from being damaged by the impact current.
The specific process of the soft start is easily implemented by those skilled in the art, and is not described again.
300, acquiring operating parameters of the electrically-driven fracturing unit;
the operation parameters of the electrically-driven fracturing unit are parameters reflecting whether the operation of the electrically-driven fracturing unit meets the operation requirement (construction requirement), and can be single parameters such as pressure in a pipe or current displacement; or the comprehensive embodiment of a plurality of parameters can be realized as long as the comprehensive embodiment can reflect whether the operation of the electrically-driven fracturing unit meets the operation requirement or not.
Based on the operating parameters, we can determine whether the electrically-driven fracturing unit meets the operating requirements, or can determine an approximate difference between the operating requirements and the time when the operating requirements are not met.
in this step, the operation parameters are used for judging whether the construction requirements are met; the power range of the variable frequency fracturing sled 11 is used for restricting the maximum operating power of the variable frequency fracturing sled 11 to be adjusted, and the power range is prevented from being exceeded.
Wherein, increase one by one the operating power of frequency conversion fracturing sled 11, can take multiple mode to realize, for example:
the implementation mode is as follows: selecting one of the frequency conversion fracturing prys 11, and gradually increasing the running power of the frequency conversion fracturing pry until the running power reaches the maximum value in a power range; and then selecting one from the rest frequency conversion fracturing prys 11 to repeat the operation until the operation parameters reach the construction requirements or the frequency conversion fracturing prys 11 completely traverse.
The implementation mode two is as follows: setting adjustment amplitude for adjusting the variable frequency fracturing prys 11, and respectively increasing each variable frequency fracturing pry 11 by one adjustment amplitude according to a set sequence (the set sequence can be randomly selected or selected from the maximum value of a power range and then selected from the large to the small or selected from the small to the large or preset); and then, each variable frequency fracturing pry 11 is increased by an adjusting amplitude in a circulating mode again until the operation parameters reach the construction requirements or the variable frequency fracturing prys 11 are all increased to the maximum value within the power range.
The implementation mode is three: setting the optimal operation power of the frequency conversion fracturing prys 11 within a power range, and gradually increasing the operation power of each frequency conversion fracturing pry 11 to the optimal operation power (not increasing to the maximum value within the power range) according to the first implementation mode; until the operation parameters reach the construction requirements or the frequency conversion fracturing pry 11 completely traverses; if the frequency conversion fracturing pry 11 completely does not reach the construction requirement after traversing, the frequency conversion fracturing pry 11 is reselected, the optimal operation power is gradually increased to the maximum value in the power range, and then one of the rest frequency conversion fracturing prys 11 is selected for repeated operation until the operation parameters reach the construction requirement or the frequency conversion fracturing pry 11 completely traverses.
Other improvements may also be made to or incorporated into the above-described implementations.
Therefore, the fixed-frequency fracturing pry 12 can be started first, and then the variable-frequency fracturing pry 11 can be started; on one hand, the operation parameters can finally reach the construction requirements, and on the other hand, the current impact influence between fixed-frequency starting and variable-frequency starting can be avoided.
Optionally, as shown in fig. 5, in step 500, the operation power of each frequency conversion fracturing sled 11 is counted, and the total operation power of the frequency conversion fracturing sled 11 is allocated in equal proportion according to the maximum power of the power range of each frequency conversion fracturing sled 11, including:
the operating powers of the frequency conversion fracturing skids 11 are different, and some of the operating powers may even be in a non-operating state, so that the current operating powers of the frequency conversion fracturing skids 11 need to be counted respectively.
the total operating power of the variable frequency fracturing pry 11 is the sum of the operating powers of the variable frequency fracturing pry 11.
each of the variable frequency fracturing skids 11 has its own power range, the maximum power within this power range representing the maximum allowable power for this variable frequency fracturing skid 11.
And 540, redistributing the total operating power of the variable frequency fracturing skids 11 according to the ratio of the maximum power of each variable frequency fracturing skid 11.
In this step, all the variable frequency fracturing skids 11 are operated at the same percentage of the corresponding maximum power. That is, after redistribution, any of the variable frequency fracturing skids 11 operate at the same proportion of their maximum power (e.g., all of the variable frequency fracturing skids 11 operate at half the respective maximum power). Thereby greatly reducing damage to the service life of the running variable frequency fracturing skid 11.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (13)
1. An electrically driven fracturing unit, comprising: the fracturing pry assembly comprises a fracturing pry assembly (1) and a frequency conversion system (2), wherein the fracturing pry assembly (1) at least comprises a frequency conversion fracturing pry (11) and a certain frequency fracturing pry (12); the fixed-frequency fracturing pry (12) is communicated with a power supply bus (3); one end of the frequency conversion system (2) is communicated with the power supply bus (3), the other end of the frequency conversion system is communicated with the frequency conversion fracturing pry (11), and the current frequency of the frequency conversion fracturing pry (11) is adjusted.
2. An electrically driven fracturing unit according to claim 1, wherein the total rated power of the fixed frequency fracturing sled (12) in the fracturing sled assembly (1) is 1/3-2/3 of the total rated power of the fracturing sled assembly (1), or
The number of the fixed-frequency fracturing prys (12) in the fracturing pry component (1) is 0.5-2 times that of the variable-frequency fracturing prys (11).
3. An electrically driven fracturing unit according to claim 1, wherein the total rated power of the fixed frequency fracturing sled (12) in the fracturing sled assembly (1) is 1/2 of the total rated power of the fracturing sled assembly (1), or
The number of the fixed-frequency fracturing prys (12) in the fracturing pry assembly (1) is the same as that of the variable-frequency fracturing prys (11).
4. An electrically driven fracturing unit according to any of claims 1 to 3, wherein the rated power of the constant frequency fracturing skid (12) in the fracturing skid assembly (1) falls within the total power range of the variable frequency fracturing skid (11).
5. An electrically driven fracturing unit according to any of claims 1 to 3, wherein the number of the constant frequency fracturing skids (12) in the fracturing skid assembly (1) is plural, the number of the variable frequency fracturing skids (11) is one or two, and the rated power of at least one constant frequency fracturing skid (12) falls within the total power range of the variable frequency fracturing skid (11).
6. An electrically driven fracturing unit according to any of claims 1 to 3, wherein the variable/fixed frequency frac sled (11, 12) comprises a drive motor (13) and a frac pump (14), the drive motor (13) driving the frac pump (14).
7. The electrically driven fracturing unit of claim 6, wherein the fracturing pump (14) is a plurality, the variable frequency fracturing skid (11)/the fixed frequency fracturing skid (12) further comprising a transfer case (15), the drive motor (13) being connected to the plurality of fracturing pumps (14) through the transfer case (15), the transfer case (15) distributing the power of the drive motor (13) to the plurality of fracturing pumps (14).
8. The electrically driven fracturing unit according to claim 6, characterized in that the number of the drive motors (13) in the variable frequency fracturing skid (11)/the fixed frequency fracturing skid (12) is one.
9. An electrically driven fracturing unit according to any of claims 1 to 3, wherein the frequency conversion system (2) comprises a frequency converter (21), the frequency converter (21) being connected to the frequency conversion fracturing skid (11).
10. An electrically driven fracturing unit according to claim 9, wherein one of the frequency converters (21) is connected to two or three of the frequency converting fracturing skids (11).
11. An electrically driven fracturing system, comprising an electrically driven fracturing unit according to any of claims 1 to 10 and a generator set (4), said generator set (4) being in communication with said electrically driven fracturing unit via said power bus (3).
12. The control method of the electrically-driven fracturing unit is characterized by comprising the following steps:
step 100, after the electrically-driven fracturing unit is powered on, obtaining predicted working power, rated power of each constant-frequency fracturing pry and power range of each variable-frequency fracturing pry;
step 200, determining the constant-frequency fracturing pry to be started and starting the constant-frequency fracturing pry according to the predicted working power and the rated power of the constant-frequency fracturing pry;
300, acquiring operating parameters of the electrically-driven fracturing unit;
step 400, increasing the operating power of the frequency conversion fracturing pry one by one according to the operating parameters and the power range of the frequency conversion fracturing pry until the operating parameters meet the construction requirements;
and 500, counting the operating power of each frequency conversion fracturing pry, and carrying out equal proportion distribution on the total operating power of the frequency conversion fracturing pry according to the maximum power of the power range of each frequency conversion fracturing pry.
13. The method for controlling an electrically-driven fracturing unit according to claim 12, wherein the step 500 of counting the operating power of each of the frequency conversion fracturing skids and performing equal proportion distribution on the total operating power of the frequency conversion fracturing skids according to the maximum power of the power range of each of the frequency conversion fracturing skids comprises:
step 510, counting the operating power of each variable-frequency fracturing pry;
step 520, calculating the total operating power of the variable frequency fracturing prys according to the operating power of each variable frequency fracturing pry;
step 530, determining the ratio of the maximum power of each frequency conversion fracturing pry according to the maximum power of the power range of each frequency conversion fracturing pry;
and 540, redistributing the total operating power of the variable frequency fracturing prys according to the ratio of the maximum power of each variable frequency fracturing pry.
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| CN202011301721.8A CN112302610A (en) | 2020-11-19 | 2020-11-19 | Electrically-driven fracturing unit, system and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023082249A1 (en) * | 2021-11-15 | 2023-05-19 | 烟台杰瑞石油装备技术有限公司 | Electrically-driven fracturing device |
| WO2023245636A1 (en) * | 2022-06-24 | 2023-12-28 | 烟台杰瑞石油装备技术有限公司 | Fracturing control method and fracturing system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB692894A (en) * | 1951-03-09 | 1953-06-17 | British Insulated Callenders | Improvements in electric measuring apparatus of the bridge type working with alternating currents |
| CN105673105A (en) * | 2016-04-01 | 2016-06-15 | 上海开山能源装备有限公司 | Organic Rankine cycle expander system with combined working medium conveying mechanism |
| CN110645159A (en) * | 2019-11-01 | 2020-01-03 | 三一石油智能装备有限公司 | Electrically-driven fracturing driving system and electrically-driven fracturing device |
| CN210049880U (en) * | 2018-12-18 | 2020-02-11 | 烟台杰瑞石油装备技术有限公司 | Ultrahigh-power-density electrically-driven fracturing equipment |
| CN213597942U (en) * | 2020-11-19 | 2021-07-02 | 三一石油智能装备有限公司 | Electrically-driven fracturing unit and system |
-
2020
- 2020-11-19 CN CN202011301721.8A patent/CN112302610A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB692894A (en) * | 1951-03-09 | 1953-06-17 | British Insulated Callenders | Improvements in electric measuring apparatus of the bridge type working with alternating currents |
| CN105673105A (en) * | 2016-04-01 | 2016-06-15 | 上海开山能源装备有限公司 | Organic Rankine cycle expander system with combined working medium conveying mechanism |
| CN210049880U (en) * | 2018-12-18 | 2020-02-11 | 烟台杰瑞石油装备技术有限公司 | Ultrahigh-power-density electrically-driven fracturing equipment |
| CN110645159A (en) * | 2019-11-01 | 2020-01-03 | 三一石油智能装备有限公司 | Electrically-driven fracturing driving system and electrically-driven fracturing device |
| CN213597942U (en) * | 2020-11-19 | 2021-07-02 | 三一石油智能装备有限公司 | Electrically-driven fracturing unit and system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023082249A1 (en) * | 2021-11-15 | 2023-05-19 | 烟台杰瑞石油装备技术有限公司 | Electrically-driven fracturing device |
| WO2023245636A1 (en) * | 2022-06-24 | 2023-12-28 | 烟台杰瑞石油装备技术有限公司 | Fracturing control method and fracturing system |
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