CN114033332B - Continuous and stable ash supply device for well cementation equipment and control method thereof - Google Patents
Continuous and stable ash supply device for well cementation equipment and control method thereof Download PDFInfo
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- CN114033332B CN114033332B CN202111241156.5A CN202111241156A CN114033332B CN 114033332 B CN114033332 B CN 114033332B CN 202111241156 A CN202111241156 A CN 202111241156A CN 114033332 B CN114033332 B CN 114033332B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000004568 cement Substances 0.000 claims abstract description 204
- 238000005303 weighing Methods 0.000 claims abstract description 30
- 238000003860 storage Methods 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000011166 aliquoting Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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Abstract
The invention provides a continuous and stable ash supply device for well cementation equipment, which comprises an air supply device and at least two cement ash tanks, wherein an air outlet of the air supply device is provided with a total air valve, each cement ash tank is respectively communicated with the air outlet of the air supply device, the lower end of each cement ash tank is connected with a weighing base, a discharge port of each cement ash tank is sequentially provided with an air pressure monitor and an ash valve, and the discharge port of each cement ash tank is used for being communicated with the well cementation equipment, so that the problem of continuous and stable supply of cement ash in the well cementation construction process is solved.
Description
Technical Field
The invention relates to the field of petroleum machinery equipment, in particular to a continuous and stable ash supply device for well cementation equipment and a control method thereof.
Background
The petrochemical industry is taken as a post industry in China, has long production line and wide involved range, and is continuously developed along with the increase of social economy. The well cementation is one of important links in the well construction process of the oil and gas well, and is a hidden underground operation project which has wide involved area, high risk, high operation requirement and strong technical performance. The quality of well cementation directly influences whether the well can continue drilling, smooth production, the service life of an oil and gas well and the recovery ratio of an oil and gas reservoir. The well cementation equipment is used as petroleum equipment with high technical content, has great influence on efficient development of oil gas, and the fine equipment provides powerful technical support for well cementation construction of oil and gas fields.
Through the technical accumulation of solving the actual problems on site in scientific research, development and production in recent years, china makes great progress in the aspect of cementing technology, forms a plurality of advanced and practical special cementing technologies, solves a plurality of technical problems encountered by each oil field, basically meets the requirements of exploration and development, and mainly reflects the aspects of basic formation of the well cementing technology of deep wells and ultra-deep wells, certain progress of the well cementing technology of complex gas wells, further improvement of the well cementing quality, gradual matching and perfection of the well cementing technology of horizontal wells and special processes, richer well cementing cement slurry systems, obvious improvement of the well cementing equipment technical level and the like.
Although most of well cementation technologies are continuously perfected and developed through the development of nearly half century, well cementation equipment still has the problems of low engineering adaptability, difficult control of cement paste preparation precision and the like in the aspect of automatic control. The main reason for the problems is found by research and analysis that cement ash used for preparing cement paste at present cannot be continuously and stably supplied to well cementation equipment through the existing ash supply system, whether an ash tank is inverted or not is judged manually, the influence of human factors is large, and the quality of cement paste prepared automatically cannot be ensured.
Along with the gradual expansion of the development scale of shale gas, the limitation and the deficiency that the manual tank pouring and the continuous and stable ash source ash supply system cannot be provided are increasingly obvious, and the requirements of field operation are increasingly difficult to adapt; it is necessary to provide a device and a control method capable of realizing continuous and stable ash supply so as to meet the increasingly severe engineering demands and efficiently, safely and excellently develop the assisted shale gas.
Referring to the prior art, CN 108894748B is a structure recorded in an automatic ash supply device and a control method for well cementation equipment, the method mainly realizes continuous supply of cement ash through a pouring tank, and ensures total supply quantity, but because the ash supply quantity of a single tank body is from more to less along with time, the gap is larger, the ash supply quantity is periodically stirred all the time, and stable ash supply cannot be realized.
Disclosure of Invention
The invention provides a continuous and stable ash supply device for well cementation equipment and a control method thereof, which solve the problem of continuous and stable supply of cement ash in the well cementation construction process.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a continuous stable ash supply device for well cementation equipment, includes air feeder and two at least cement ash jars, and air outlet of air feeder is equipped with the total pneumatic valve, and each cement ash jar communicates with air outlet of air feeder respectively, and each cement ash jar lower extreme is connected with the base of weighing, and the discharge gate of each cement ash jar is equipped with barometric monitor and ash valve in proper order, and the discharge gate of each cement ash jar is used for with well cementation equipment intercommunication.
In the preferred scheme, the air inlet of each cement ash tank is provided with a gas dividing valve, and the air inlet of each cement ash tank is communicated with the air outlet of the air supply device.
In the preferred scheme, the automatic ash storage device is also provided with a compensator, an ash storage cavity is arranged in the compensator, the compensator is provided with an air inlet and a discharge hole, the air inlet of the compensator is provided with a third air dividing valve, and the discharge hole of the compensator is provided with a third ash valve.
In the preferred scheme, ash storage chamber below is equipped with the partition frame, and the partition frame below is equipped with the buffer memory chamber, and the air inlet intercommunication buffer memory chamber upper end of compensator, the discharge gate intercommunication buffer memory chamber lower extreme of compensator, the partition frame upper and lower both ends are equipped with adjustable aperture's last sliding door device and lower sliding door device respectively, and the partition frame upper and lower both ends opening is equipped with a plurality of division boards in the partition frame, and the partition board separates the partition frame inner space and is a plurality of equal unit rooms of volume.
In the preferred scheme, a control system is further arranged and is electrically connected with the main air valve, the well cementation equipment, the upper sliding door device, the lower sliding door device, each air dividing valve, each weighing base, each air pressure monitor and each ash valve.
Comprises a control method of an ash supply device,
S1, inputting technological parameters of an executive component;
S2, starting an air supply device, and introducing cement ash into the well cementation equipment through a plurality of cement ash tanks;
and S3, after the ash supply is finished, closing the air supply device, stopping the well cementation equipment, and supplementing cement ash into the first cement ash tank and the second cement ash tank for the next use.
In a preferred embodiment, S2 comprises an ash supply method:
s211, opening a main air valve, and starting an air supply device to supply air, wherein the air supplied by the air supply device conveys cement ash in the first cement ash tank to well cementation equipment to prepare cement slurry;
S212, the first weighing base monitors the weight of the first cement ash tank in real time, when the weight of the first cement ash tank is lower than X1, the first cement ash tank is recorded as a time point T1, a first ash valve is closed, the first cement ash tank stops cement ash conveying, and pressure is started to be held in the first cement ash tank;
S213, opening a second ash valve, and conveying cement ash in the second cement ash tank to well cementation equipment by gas provided by the gas supply device;
S214, when the first air pressure monitor monitors that the pressure in the first cement ash tank is increased to Y1, the first ash valve is opened according to the opening degree of Z1%, and the first cement ash tank and the second cement ash tank simultaneously start to convey cement ash;
S215, when the first weighing base monitors that the weight of the first cement ash tank is lower than X2, the first ash valve is closed, the first cement ash tank stops ash conveying, and the second cement ash tank continues ash conveying.
In a preferred embodiment, the ash supply method includes a cement ash conveying amount compensation method:
S221, determining a unit time length DT according to the weight recognition precision of the weighing base;
s222, dividing a cement ash conveying time period into a plurality of equal unit time lengths DT;
S223, monitoring the lost mass of the first cement ash tank and the second cement ash tank in the unit time length DT by the first weighing base and the second weighing base, and summing to obtain DM;
s224, calculating the cement ash mass required to be compensated in the DT time of the unit time length, which is known to be M1, which is the cement ash conveying amount in the unit time length required by the theoretical well cementation equipment, as M1-dm=cm;
S225, controlling the compensator to add cement ash with the mass of CM into the well cementation equipment in the next unit time DT so as to make up for the shortage of the total output amount of cement ash of the first cement ash tank and the second cement ash tank.
In a preferred scheme, the method for using the compensator is further comprised:
S2251, linearly corresponding the opening of the upper sliding door device and the lower sliding door device to the cement ash quality to be compensated because the capacities of the unit chambers are equal;
S2252, opening the upper sliding door device to the maximum, filling cement ash in the ash storage cavity above into each unit chamber of the equal division frame, and then closing the upper sliding door device to separate the equal division frame from the ash storage cavity;
S2253, controlling the opening of the sliding door device according to the CM size to enable cement ash in part of the unit chambers to fall into the buffer cavity, and then closing the sliding door device;
S2254, opening a third air dividing valve and a third ash valve to convey cement ash in the buffer cavity to well cementation equipment.
The parameters X1, X2, Y1, Z1, DT, M1 can be set in the control system 1.
The beneficial effects of the invention are as follows: the continuous well cementation and ash supply are ensured by a multi-cement ash tank relay supply mode; the overlapping part exists on the ash supply time sequence of the first cement ash tank and the second cement ash tank, so that the excessive fluctuation of the total ash supply amount is avoided; the cement ash tank which is positioned at the front in time sequence improves the discharge rate of the residual cement ash by suppressing pressure and controlling the opening of an ash valve, avoids the residual cement ash in the ash tank and improves the utilization rate; the ash supply quantity is compensated in real time through the compensator, so that the fluctuation quantity of the ash supply is further reduced, and the ash supply stability is ensured.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a schematic diagram of the connection of the present invention.
Fig. 2 is a supplementary schematic of the present invention.
FIG. 3 is a schematic illustration of an actuator connection of the present invention.
Fig. 4 is a schematic diagram of a compensator of the present invention.
Fig. 5 is a schematic illustration of an aliquoting shelf of the present invention.
Fig. 6 is a schematic diagram of the operation of the compensator of the present invention.
Fig. 7 is a second schematic diagram of the operation of the compensator of the present invention.
Fig. 8 is a third schematic diagram of the operation of the compensator of the present invention.
Fig. 9 is a schematic diagram of the operation of the compensator of the present invention.
FIG. 10 is a schematic illustration of the single can throughput of the present invention.
FIG. 11 is a schematic illustration of the dual tank throughput of the present invention.
Fig. 12 is a schematic diagram of the theoretical compensation curve of the present invention.
Fig. 13 is a schematic diagram of the conversion of the theoretical compensation value of the present invention into the actual compensation value.
Fig. 14 is a schematic diagram of the actual average compensation line of the present invention.
FIG. 15 is a schematic view of the actual cement ash delivery rate after compensation according to the invention.
FIG. 16 is a schematic view showing the actual cement ash transport amount after the hysteresis improvement of the present invention.
In the figure: a control system 1; a gas supply device 2; a main air valve 3; a first cement ash tank 4; a second cement ash tank 5; a first ash valve 6; a second ash valve 7; a first weighing base 8; a second weighing base 9; cementing equipment 10; a control cable 11; a first air pressure monitor 12; a second air pressure monitor 13; a first gas dividing valve 14; a second gas dividing valve 15; a compensator 16; a third gas dividing valve 17; a third ash valve 18; an aliquoting rack 19; a sliding door device 20; a sliding door device 21; an ash storage chamber 22; a partition plate 23; a unit cell 24; a buffer chamber 25.
Detailed Description
In fig. 1-15, a continuous stable ash supply device for well cementation equipment comprises an air supply device 2 and at least two cement ash tanks, such as a first cement ash tank 4 and a second cement ash tank 5, wherein the quantity of the cement ash tanks is based on the condition that the ash can be supplied for well cementation operation once, an air outlet of the air supply device 2 is provided with a total air valve 3, the opening and the closing of the air supply device 2 and the total air pressure are controlled, each cement ash tank is respectively communicated with an air outlet of the air supply device 2, the lower end of each cement ash tank is connected with a weighing base, the lower end of the first cement ash tank 4 is provided with a first weighing base 8, the lower end of the second cement ash tank 5 is provided with a second weighing base 9 for monitoring the real-time weight of each cement ash tank, the discharge port of each cement ash tank is sequentially provided with an air pressure monitor 12 and a first ash valve 6, the discharge port of each cement ash tank 4 is sequentially provided with a second air pressure monitor 13 and a second ash valve 7, the air pressure monitor monitors the real-time air pressure in the cement ash tanks, the ash valves can control the opening degree, the cement ash valves are respectively, the cement quantity is adjusted, and the cement ash is used for conveying the cement ash is supplied to the well cementation equipment 10 for well cementation.
In the preferred scheme, the air inlet of each cement ash jar is equipped with the branch pneumatic valve, and the air inlet of first cement ash jar 4 is equipped with first branch pneumatic valve 14, and the air inlet of second cement ash jar 5 is equipped with second branch pneumatic valve 15, divides pneumatic valve area atmospheric pressure regulatory function, conveniently carries out independent atmospheric pressure adjustment to each cement ash jar, divides the pneumatic valve mouth to set up the check valve, avoids the gas mixing between the different cement ash jars, and the air inlet of each cement ash jar communicates with the gas outlet of air feeder 2 to air feeder 2 is supplied with the cement ash jar air to the convenience.
In the preferred scheme, the compensator 16 is further arranged, the ash storage cavity 22 is arranged in the compensator 16, the compensator 16 is provided with an air inlet and a discharge hole, the air inlet of the compensator 16 is provided with a third air dividing valve 17, and the discharge hole of the compensator 16 is provided with a third ash valve 18.
Because the cement ash stored in the cement ash tank is less and less along with the use, the amount of the cement ash blown out in unit time is gradually reduced, and the ash supply amount in unit time can be effectively increased by simultaneously supplying ash to the double tanks, so that the ash supply amount is gradually reduced along with the time, the compensator 16 is required to be added for the working condition of quite stable ash supply amount requirement, the missing conveying amount is compensated in real time or in a time period, and the cement ash with the weight is supplemented and conveyed to the well cementation equipment 10 according to the missing value obtained by monitoring the weighing base.
In the preferred scheme, a dividing frame 19 is arranged below the ash storage cavity 22, a buffer cavity 25 is arranged below the dividing frame 19, an air inlet of the compensator 16 is communicated with the upper end of the buffer cavity 25, a discharge hole of the compensator 16 is communicated with the lower end of the buffer cavity 25, an upper sliding door device 20 and a lower sliding door device 21 with adjustable opening degrees are respectively arranged at the upper end and the lower end of the dividing frame 19, the upper end and the lower end of the dividing frame 19 are respectively opened, a plurality of partition plates 23 are arranged in the dividing frame 19, and the inner space of the dividing plate 23 is divided into a plurality of unit chambers 24 with equal volumes.
The ash storage chamber 22 is used for storing cement ash for compensation, the sliding distance of the upper sliding door device 20 and the lower sliding door device 21 can be controlled by a linear servo moving mechanism or other linear moving mechanisms with displacement sensors, the cement ash is stored by each unit chamber 24 when entering the aliquoting frame 19, when the volume of each unit chamber 24 is equal, the cement ash with the capacity of one unit chamber 24 enters the buffer chamber 25 after the lower sliding door device 21 slides by the distance of the width of one unit chamber 24, and the cement ash needing to be released by the unit chambers 24 is determined according to the cement ash quantity needing to be compensated in the unit time.
In the preferred scheme, a control system 1 is further arranged, the control system 1 is electrically connected with a main air valve 3, a well cementation device 10, an upper sliding door device 20, a lower sliding door device 21, each air dividing valve, each weighing base, each air pressure monitor and each ash valve through a control cable 11 so as to control the operation of each execution element, and the operation parameters of each execution element can also be set through the control system 1.
The upper sliding door apparatus 20 and the lower sliding door apparatus 21 are also controlled in unison by the control system 1.
As shown in fig. 10 to 16, the control method of the ash supply device is as follows,
S1, inputting technological parameters of execution elements, namely inputting the technological parameters of execution components such as an air supply device 2, a main air valve 3, a first ash valve 6, a second ash valve 7, well cementation equipment 10 and the like in a control system 1, and sending real-time instructions to the execution components by the control system 1 through a control cable 11;
s2, starting the air supply device 2, and independently, relay or jointly introducing cement ash into the well cementation equipment 10 through a plurality of cement ash tanks;
And S3, after the ash supply is finished, the air supply device 2 is closed, the well cementation equipment 10 stops working, and cement ash is supplemented into the first cement ash tank 4 and the second cement ash tank 5 for the next use.
If more than two cement ash tanks are needed in the well cementation working condition, the cement ash conveying method of the follow-up third cement ash tank, the fourth cement ash tank and the like is carried out in relay mode according to the method until the well cementation is finished, and cement ash in the ash tank is replenished.
In a preferred embodiment, S2 comprises an ash supply method:
S211, opening a main air valve 3, starting an air supply device 2 to supply air, and conveying cement ash in a first cement ash tank 4 to well cementation equipment 10 by the air supplied by the air supply device 2 to prepare cement slurry;
s212, the first weighing base 8 monitors the weight of the first cement ash tank 4 in real time, the value monitored by the first weighing base 8 gradually decreases along with the consumption of cement ash, and as the cement ash amount decreases, the gas flow obstruction decreases, the flow speed and the flow rate increase, so that the dynamic air pressure also tends to decrease, when the weight of the first cement ash tank 4 is lower than 20% of the full tank value under the condition of removing the dead weight of the ash tank, the time point T1 is recorded, 80% of cement ash in the first cement ash tank 4 is consumed at the moment, the first ash valve 6 is closed, the first cement ash tank 4 stops cement ash conveying, and the pressure in the first cement ash tank 4 starts to be held;
s213, opening the second ash valve 7, and conveying the cement ash in the second cement ash tank 5 to the well cementation equipment 10 by the gas provided by the gas supply device 2, wherein the cement ash conveying amount is restored to the highest value just before the second cement ash tank 5 is in a full tank state;
s214, when the first air pressure monitor 12 monitors that the pressure in the first cement ash tank 4 is increased to 80% of the initial pressure, the time point T2 is recorded, the first ash valve 6 is opened according to the opening degree of 50%, and the first cement ash tank 4 and the second cement ash tank 5 start to convey cement ash at the same time;
s215, when the first weighing base 8 monitors that the weight of the first cement ash tank 4 (the dead weight of the ash removal tank) is lower than 5%, residual cement ash is difficult to discharge through air pressure, the first ash valve 6 is closed, the first cement ash tank 4 stops ash conveying, and the second cement ash tank 5 continues ash conveying.
In a preferred embodiment, the ash supply method includes a cement ash conveying amount compensation method:
S221, determining the unit time length DT to be 1min according to the weight recognition precision of the weighing base, namely, the weighing base can accurately sense the weight change value within the time length of 1min, wherein the setting of the time length value depends on the minimum resolution of the weighing base for weight and the communication time interval with the control system 1;
S222, dividing the cement ash conveying time period into a plurality of equal unit time lengths DT, for example, dividing a time axis into 60 equal small segments when the total cement ash conveying time period is 1 h;
S223, the first weighing base 8 and the second weighing base 9 monitor the lost mass of the first cement ash tank 4 and the second cement ash tank 5 in the unit time DT and sum to obtain DM, namely the mass of cement ash transported every minute, the value is refreshed in the next minute, when the first cement ash tank 4 works independently, the lost mass is DM in 1 minute, when the first cement ash tank 4 is pressurized and transported in combination with the second cement ash tank 5, the DM value is the sum of the lost masses of the first cement ash tank 4 and the second cement ash tank 5, when the first cement ash tank 4 stops working, and the second cement ash tank 5 continues working, the DM value is the mass lost in 1 minute independently;
S224, knowing that the cement ash conveying amount in a unit time length required by the cementing equipment 10 is M1 theoretically, calculating the cement ash mass required to be compensated in the unit time length DT to be M1-dm=cm, where the value of M1 depends on the cement ash flow amount required for cementing and can be set by working conditions, so that it is known;
And S225, controlling the compensator 16 to add cement ash with the mass of CM into the well cementation equipment 10 in the next unit time length DT so as to make up for the shortage of the total cement ash output of the first cement ash tank 4 and the second cement ash tank 5.
For example, where the cementing operation is such that 10KG cement ash is required to be delivered per minute, and in practice 7KG is delivered during the 1 minute period, the compensator 16 needs to be replenished with 3KG at the next minute, i.e., m1=10 KG, dm=7kg, cm=3 KG, although the compensation is delayed for 1 minute, the fluctuation is not significant over the macroscopic delivery period of 1 hour.
Since the cement ash conveying amount generally has a decreasing trend, the effect of the hysteresis is that the compensation value is always less than the required compensation value, the actual conveying amount curve has a slow decreasing trend, in order to improve the hysteresis, the DM2 is compensated by replacing the DM2 with the DM according to experience or by calculating the to-be-compensated mass DM2 in the next time period, wherein the DM2 is slightly more than the DM, as shown in fig. 16.
In a preferred embodiment, the method for using the compensator 16 is also included:
s2251, since the capacities of the unit chambers 24 are equal, the opening degrees of the upper sliding gate device 20 and the lower sliding gate device 21 are linearly corresponding to the mass of cement ash to be compensated, for example, cm=3kg, each unit chamber 24 can store 1KG of cement ash, and the lower sliding gate device 21 is required to slide for a distance of 3 unit chambers 24;
s2252, the upper sliding door device 20 is opened to the maximum, so that cement ash in the upper ash storage cavity 22 fills up each unit chamber 24 of the equal division frame 19, and then the upper sliding door device 20 is closed to separate the equal division frame 19 from the ash storage cavity 22;
s2253, controlling the opening of the sliding door device 21 according to the CM size to enable cement ash in part of the unit chambers 24 to fall into the buffer cavity 25, and then closing the sliding door device 21;
S2254, opening the third air dividing valve 17 and the third ash valve 18 to convey cement ash in the buffer cavity 25 to the well cementing equipment 10.
The above embodiments are only preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention should be defined by the claims, including the equivalents of the technical features in the claims. I.e., equivalent replacement modifications within the scope of this invention are also within the scope of the invention.
Claims (2)
1. A control method of a continuous stable ash supply device for well cementation equipment is characterized by comprising the following steps: the ash supply device comprises an air supply device (2) and at least two cement ash cans, an air outlet of the air supply device (2) is provided with a total air valve (3), each cement ash can is respectively communicated with the air outlet of the air supply device (2), the lower end of each cement ash can is connected with a weighing base, a discharge port of each cement ash can is sequentially provided with an air pressure monitor and an ash valve, and the discharge port of each cement ash can is used for being communicated with well cementation equipment (10);
the air inlets of the cement ash tanks are provided with air dividing valves, and the air inlets of the cement ash tanks are communicated with the air outlets of the air supply device (2);
the device is also provided with a compensator (16), an ash storage cavity (22) is arranged in the compensator (16), the compensator (16) is provided with an air inlet and a discharge hole, the air inlet of the compensator (16) is provided with a third air dividing valve (17), and the discharge hole of the compensator (16) is provided with a third ash valve (18);
An equally dividing frame (19) is arranged below the ash storage cavity (22), a buffer cavity (25) is arranged below the equally dividing frame (19), an air inlet of the compensator (16) is communicated with the upper end of the buffer cavity (25), a discharge hole of the compensator (16) is communicated with the lower end of the buffer cavity (25), an upper sliding door device (20) and a lower sliding door device (21) with adjustable opening degrees are respectively arranged at the upper end and the lower end of the equally dividing frame (19), the upper end and the lower end of the equally dividing frame (19) are opened, a plurality of partition plates (23) are arranged in the equally dividing frame (19), and the inner space of the equally dividing frame (19) is divided into a plurality of unit chambers (24) with equal volumes;
The method comprises the following steps:
S1, inputting technological parameters of an executive component;
s2, starting an air supply device (2), and introducing cement ash into the well cementation equipment (10) through a plurality of cement ash tanks;
Comprises the following steps:
S211, opening a main air valve (3), starting an air supply device (2) to supply air, and conveying cement ash in a first cement ash tank (4) to well cementation equipment (10) by the air supplied by the air supply device (2) to prepare cement slurry;
S212, the first weighing base (8) monitors the weight of the first cement ash tank (4) in real time, when the weight of the first cement ash tank (4) is lower than X1, the first cement ash tank is recorded as a time point T1, the first ash valve (6) is closed, the first cement ash tank (4) stops cement ash conveying, and the first cement ash tank (4) starts to hold pressure;
s213, opening a second ash valve (7), and conveying cement ash in a second cement ash tank (5) to well cementation equipment (10) by gas provided by a gas supply device (2);
s214, when the first air pressure monitor (12) detects that the pressure in the first cement ash tank (4) is increased to Y1, the time point T2 is recorded, the first ash valve (6) is opened according to the opening degree of Z1%, and the first cement ash tank (4) and the second cement ash tank (5) start to convey cement ash at the same time;
S215, when the first weighing base (8) monitors that the weight of the first cement ash tank (4) is lower than X2, the first ash valve (6) is closed, the first cement ash tank (4) stops ash conveying, and the second cement ash tank (5) continues ash conveying;
the cement ash conveying amount compensation method comprises the following steps:
S221, determining a unit time length DT according to the weight recognition precision of the weighing base;
s222, dividing a cement ash conveying time period into a plurality of equal unit time lengths DT;
s223, monitoring the lost mass of the first cement ash tank (4) and the second cement ash tank (5) in the unit time length DT by the first weighing base (8) and the second weighing base (9) and summing to obtain DM;
S224, knowing that in theory, the cement ash conveying amount in a unit time length required by the well cementation equipment (10) is M1, and calculating the cement ash mass required to be compensated in the unit time length DT time to be M1-dm=cm;
s225, controlling the compensator (16) to add cement ash with the mass of CM into the well cementation equipment (10) in the next unit time length DT so as to make up for the shortage of the total output amount of cement ash of the first cement ash tank (4) and the second cement ash tank (5);
comprises the use method of the compensator (16):
S2251, linearly corresponding the opening degree of the upper sliding door device (20) and the lower sliding door device (21) to the cement ash quality to be compensated because the capacity of each unit chamber (24) is equal;
S2252, opening the upper sliding door device (20) to the maximum, filling cement ash in the upper ash storage cavity (22) into each unit chamber (24) of the dividing frame (19), closing the upper sliding door device (20), and separating the dividing frame (19) from the ash storage cavity (22);
S2253, controlling the opening of the sliding door device (21) according to the CM size to enable cement ash in part of the unit chambers (24) to fall into the buffer cavity (25), and then closing the sliding door device (21);
S2254, opening a third air dividing valve (17) and a third ash valve (18) to convey cement ash in the buffer cavity (25) to the well cementation equipment (10);
S3, after the ash supply is finished, the air supply device (2) is closed, the well cementation equipment (10) stops working, and cement ash is supplemented into the first cement ash tank (4) and the second cement ash tank (5) for the next use.
2. The control method of a continuous stable ash supply device for well cementing equipment according to claim 1, characterized in that: the device is also provided with a control system (1), wherein the control system (1) is electrically connected with the main gas valve (3), the well cementation equipment (10), the upper sliding door device (20), the lower sliding door device (21), each gas dividing valve, each weighing base, each gas pressure monitor and each ash valve.
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| CN114033332A (en) | 2022-02-11 |
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