CN114033332A - 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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- CN114033332A CN114033332A CN202111241156.5A CN202111241156A CN114033332A CN 114033332 A CN114033332 A CN 114033332A CN 202111241156 A CN202111241156 A CN 202111241156A CN 114033332 A CN114033332 A CN 114033332A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000004568 cement Substances 0.000 claims abstract description 187
- 238000005303 weighing Methods 0.000 claims abstract description 31
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000011083 cement mortar Substances 0.000 claims description 23
- 238000003860 storage Methods 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
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- 230000006872 improvement Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
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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 a gas outlet of the air supply device is provided with a master gas valve, each cement ash tank is respectively communicated with the gas 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 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
As a support industry in China, the petrochemical industry is long in production line and wide in related range, and is continuously developed along with the increase of social economy. The well cementation is one of important links in the process of constructing the oil and gas well, and is a hidden underground operation project which is wide in related range, high in risk, high in operation requirement and strong in technical performance. The quality of well cementation directly influences whether the well can be drilled continuously or not, whether the well can be produced smoothly or not, the service life of an oil-gas well and the recovery ratio of an oil-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 excellent equipment provides powerful technical support for well cementation construction of oil and gas fields.
Through recent scientific research and development and technological accumulation for solving field practical problems in production, China makes great progress in the aspect of well cementation technology, forms a plurality of advanced and practical well cementation characteristic technologies, solves a plurality of technical problems encountered in various oil fields, basically meets the requirements of exploration and development, and is mainly embodied in the aspects of basic formation of well cementation technologies of deep wells and ultra-deep wells, certain progress of complex gas well cementing technologies, further improvement of well cementation quality, gradual matching and perfection of well cementation technologies of horizontal wells and special processes, richer well cementation cement slurry systems, obvious improvement of technical levels of well cementation equipment and the like.
Although most of well cementation technologies are continuously perfected and developed after the development of nearly half century, the well cementation equipment still has the problems of low engineering adaptability, difficulty in controlling cement slurry preparation precision and the like in the aspect of automatic control. Research and analysis find that the main reasons causing the problems are that cement ash used for preparing cement slurry at present cannot be continuously and stably supplied to well cementation equipment through an 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 the automatically prepared cement slurry cannot be guaranteed.
Along with the gradual expansion of the development scale of the shale gas, the limitation and the defect that the manual tank dumping cannot provide a continuous and stable ash source ash supply system are increasingly obvious, and the requirement of field operation is increasingly difficult to adapt; there is a need for a device and a control method capable of continuously and stably supplying ash to meet the increasingly stringent engineering requirements and assist in efficient, safe and high-quality development of shale gas.
In the prior art, the structure recorded in the CN 108894748B automatic ash supply device for well cementing equipment and the control method is referred, the method mainly realizes continuous supply of cement ash by tank reversing to ensure the total supply amount, but because the ash supply amount of a single tank body is changed from more to less along with time and the difference is large, the ash supply amount is shifted periodically 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 technical scheme adopted by the invention is as follows: the utility model provides a supply grey device in succession stably for well cementation equipment, includes air feeder and two at least cement ash jars, and air feeder's gas outlet is equipped with total pneumatic valve, and each cement ash jar communicates with air feeder's gas outlet 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 atmospheric pressure monitor and ash valve in proper order, and the discharge gate of each cement ash jar is used for equipping the intercommunication with the well cementation.
In the preferred scheme, the air inlet of each cement ash tank is provided with an air distributing 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, still be equipped with the compensator, be equipped with the ash storage chamber in the compensator, the compensator is equipped with air inlet and discharge gate, and the air inlet of compensator is equipped with third minute pneumatic valve, and the discharge gate of compensator is equipped with the third ash valve.
In the preferred scheme, an equal division frame is arranged below the ash storage cavity, a buffer cavity is arranged below the equal division frame, an air inlet of the compensator is communicated with the upper end of the buffer cavity, a discharge port of the compensator is communicated with the lower end of the buffer cavity, an upper sliding door device and a lower sliding door device with adjustable opening degrees are respectively arranged at the upper end and the lower end of the equal division frame, the upper end and the lower end of the equal division frame are opened, a plurality of partition plates are arranged in the equal division frame, and the inner space of the equal division frame divided by the partition plates is a plurality of unit chambers with equal volumes.
In the preferred scheme, the device is also provided with a control system which is electrically connected with a main air valve, well cementation equipment, an upper sliding door device, a lower sliding door device, each air distribution valve, each weighing base, each air pressure monitor and each ash valve.
Comprises a control method of an ash supply device,
s1, inputting the process parameters of each executive component;
s2, starting a gas 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 includes an ash supply method:
s211, opening a main air valve, starting an air supply device to supply air, and conveying cement ash in a first cement ash tank to well cementation equipment by the air supplied by the air supply device to prepare cement slurry;
s212, monitoring the weight of the first cement ash tank in real time by the first weighing base, and when the weight of the first cement ash tank is lower than X1, recording the weight as a time point T1, closing the first ash valve, stopping conveying cement ash by the first cement ash tank, and starting suppressing pressure in the first cement ash tank;
s213, opening a second ash valve, and conveying the cement ash in the second cement ash tank to the well cementation equipment by the gas provided by the gas supply device;
s214, when the first air pressure monitor monitors that the pressure in the first cement mortar tank is increased to Y1, the pressure is recorded as a time point T2, the first mortar valve is opened according to the opening degree of Z1%, and the first cement mortar tank and the second cement mortar tank start to convey cement mortar at the same time;
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 to convey ash.
In a preferred embodiment, the ash supply method comprises a cement ash conveying amount compensation method:
s221, determining unit time length DT according to weight identification precision of the weighing base;
s222, dividing the cement ash conveying time period into a plurality of equal unit time lengths DT;
s223, monitoring the lost mass of the first cement mortar tank and the lost mass of the second cement mortar tank in unit time length DT by the first weighing base and the second weighing base, and summing to obtain DM;
s224, knowing that the cement ash conveying amount in unit time length required by well cementation equipment is M1 theoretically, and calculating the mass of the cement ash required to be compensated in DT time of the unit time length to be M1-DM = CM;
and S225, controlling the compensator to add cement ash with the mass of CM into the well cementation equipment in the next unit time length DT so as to make up for the shortage of the total cement ash output amount of the first cement ash tank and the second cement ash tank.
In a preferred scheme, the method for using the compensator comprises the following steps:
s2251, linearly corresponding the opening degrees of the upper sliding door device and the lower sliding door device to the mass of cement ash to be compensated due to the equal capacity of each unit chamber;
s2252, opening the upper sliding door device to the maximum to enable cement ash in the ash storage cavity above to fill each unit chamber of the equal-division frame, closing the upper sliding door device, and separating the equal-division frame from the ash storage cavity;
s2253, controlling the opening of the lower sliding door device according to the size of the CM to enable cement ash in part of the unit chambers to fall into the buffer cavity, and then closing the lower sliding door device;
and S2254, opening the third air distributing valve and the third ash valve, and conveying the cement ash in the buffer cavity to the well cementation equipment.
The parameters X1, X2, Y1, Z1, DT, and M1 can be set in the control system 1.
The invention has the beneficial effects that: the continuity of well cementation ash supply is ensured in a multi-cement ash tank relay supply mode; the first cement ash tank and the second cement ash tank have overlapped parts on ash supply time sequences, so that the fluctuation of the total ash supply amount is avoided being too large; the cement ash tank which is close to 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 existence of residues of the cement ash in the ash tank, and improves the utilization rate; through the compensator, the ash supply amount is compensated in real time, the fluctuation amount of the ash supply is further reduced, and the stability of the ash supply is ensured.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a schematic diagram of the connection of the present invention.
Fig. 2 is a complementary schematic of the present invention.
Fig. 3 is a schematic diagram of actuator connections of the present invention.
Fig. 4 is a schematic diagram of the compensator of the present invention.
Fig. 5 is a schematic illustration of an aliquot rack of the present invention.
Fig. 6 is a first 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 fourth schematic diagram of the operation of the compensator of the present invention.
FIG. 10 is a schematic of the single can delivery of the present invention.
FIG. 11 is a schematic of the dual canister delivery of the present invention.
Fig. 12 is a schematic diagram of a theoretical compensation curve of the present invention.
FIG. 13 is a schematic diagram of the conversion of theoretical compensation values to actual compensation values in accordance with the present invention.
Fig. 14 is a schematic diagram of the actual average compensation line of the present invention.
FIG. 15 is a schematic illustration of the compensated actual cement ash delivery of the present invention.
FIG. 16 is a graphical representation of the actual cement ash delivery after the hysteresis improvement of the present invention.
In the figure: a control system 1; a gas supply device 2; a main gas valve 3; a first cement mortar tank 4; a second cement mortar 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 distributing valve 15; a compensator 16; a third air distributing valve 17; a third ash valve 18; an aliquoting rack 19; an upper shutter device 20; a lower shutter device 21; a dust storage chamber 22; a partition plate 23; a unit cell 24; a buffer chamber 25.
Detailed Description
As shown in figures 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 number of the cement ash tanks is based on the requirement of one-time ash supply and well cementation operation, a gas outlet of the air supply device 2 is provided with a total gas valve 3 for controlling the opening and closing of the air supply device 2 and the total gas pressure, each cement ash tank is respectively communicated with the gas 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 ports of each cement ash tank are sequentially provided with a gas pressure monitor and an ash valve, the discharge port of the first cement ash tank 4 is sequentially provided with a first gas pressure monitor 12 and a first ash valve 6, the discharge port of the second cement ash tank 5 is sequentially provided with a second gas pressure monitor 13 and a second ash valve 7, the air pressure monitor monitors real-time air pressure in the cement ash tanks, the opening of the ash valve can be controlled, the amount of conveyed cement ash is adjusted, and discharge ports of the cement ash tanks are communicated with the well cementation equipment 10 and used for conveying the cement ash to the well cementation equipment 10.
In the preferred scheme, the air inlet of each cement ash tank is equipped with the air-distributing valve, the air inlet of first cement ash tank 4 is equipped with first air-distributing valve 14, the air inlet of second cement ash tank 5 is equipped with second air-distributing valve 15, the air-distributing valve has the atmospheric pressure regulatory function, conveniently carry out independent atmospheric pressure adjustment to each cement ash tank, the air-distributing valve mouth sets up the check valve, avoid the air channeling between the cement ash tanks of difference, the air inlet of each cement ash tank and air feeder 2's gas outlet intercommunication to the gas feeder 2 supplies gas to the cement ash tank.
In a preferable scheme, the device is further 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 an outlet, the air inlet of the compensator 16 is provided with a third air distributing valve 17, and the outlet of the compensator 16 is provided with a third ash valve 18.
Because the cement ash that stores in the cement ash jar is along with using less and less, consequently the cement ash volume that blows out in the unit interval is the gradual reduction state, two jars supply the ash simultaneously and can effectively increase the unit interval and supply the ash volume and reduce the supply volume and stir, but supply the ash volume and still be the decline trend gradually along with time lapse, consequently need increase compensator 16 to the operating mode that supplies ash volume requirement ten minutes stability, compensate the conveying capacity that lacks in real time or timesharing, according to the value that lacks that the monitoring of base of weighing obtained, the cement ash of this weight is carried in the replenishment to well cementation equipment 10.
In a preferable scheme, an equal division frame 19 is arranged below an ash storage cavity 22, a buffer cavity 25 is arranged below the equal division frame 19, an air inlet of a compensator 16 is communicated with the upper end of the buffer cavity 25, an outlet 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 equal division frame 19, the upper end and the lower end of the equal division frame 19 are opened, a plurality of partition plates 23 are arranged in the equal division frame 19, and the partition plates 23 divide the inner space of the equal division frame 19 into a plurality of unit chambers 24 with equal volumes.
The ash storage cavity 22 is used for storing cement ash for compensation, the upper sliding door device 20 and the lower sliding door device 21 can control the sliding distance through 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 equally dividing frame 19, when the lower sliding door device 21 slides for a distance of one unit chamber 24 width due to equal volume of each unit chamber 24, the cement ash with one unit chamber 24 volume enters the buffer cavity 25, and the cement ash needing to be released for a plurality of unit chambers 24 is determined according to the cement ash quantity needing to be compensated in the unit time.
In a preferred scheme, the system is further provided with a control system 1, 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 distributing valve, each weighing base, each gas 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 and lower sliding door devices 20, 21 are also controlled in unison by the control system 1.
As shown in fig. 10 to 16, the control method of the ash supplying apparatus is as follows,
s1, inputting the process parameters of each execution element, namely inputting the process parameters of execution components such as the gas supply device 2, the main gas valve 3, the first ash valve 6, the second ash valve 7, the well cementation equipment 10 and the like in the control system 1, and sending real-time instructions to the execution components by the control system 1 through the control cable 11;
s2, starting the gas supply device 2, and introducing cement ash into the well cementation equipment 10 through a plurality of cement ash tanks independently, in relay or in combination;
and S3, after the ash supply is finished, closing the air supply device 2, stopping the well cementation equipment 10, and supplementing the cement ash into the first cement ash tank 4 and the second cement ash tank 5 for the next use.
If the well cementation working condition needs more than two cement ash tanks, the subsequent cement ash tank cement ash conveying methods of the third cement ash tank, the fourth cement ash tank and the like are carried out in a relay mode according to the method until the well cementation is finished, and then the cement ash in the cement ash tanks is replenished.
In a preferred embodiment, S2 includes an ash supply method:
s211, opening a main gas valve 3, starting a gas supply device 2 for supplying gas, and conveying cement ash in a first cement ash tank 4 to the well cementation equipment 10 by the gas supplied by the gas 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 is gradually reduced along with the consumption of cement ash, the gas flow obstruction is reduced due to the reduction of the amount of the cement ash, and the flow rate and the flow are increased, so that the dynamic air pressure is in a descending trend, when the weight of the first cement ash tank 4 is 20% lower than the full tank value under the condition that the self weight of the ash tank is removed, the time point is T1, at the moment, 80% of the cement ash in the first cement ash tank 4 is consumed, the first ash valve 6 is closed, the first cement ash tank 4 stops conveying the cement ash, and the pressure building is started in the first cement ash tank 4;
s213, opening the second ash valve 7, 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, and starting to recover the cement ash conveying amount to the highest value due to the fact that 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 mortar tank 4 is increased to 80% of the initial pressure, the pressure is recorded as a time point T2, the first mortar valve 6 is opened according to 50% of opening degree, and the first cement mortar tank 4 and the second cement mortar tank 5 start to convey cement mortar simultaneously;
s215, when the first weighing base 8 monitors that the weight of the first cement ash tank 4 (the dead weight of the ash tank is removed) is lower than 5%, the 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 to convey ash.
In a preferred embodiment, the ash supply method comprises a cement ash conveying amount compensation method:
s221, determining the unit time length DT to be 1min according to the weight identification precision of the weighing base, namely, the weighing base can accurately sense the weight change value within 1min of time interval, and the setting of the time length value depends on the minimum resolution of the weighing base on the 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, and if the total cement ash conveying time period is 1h, dividing the time axis into equal 60 sections;
s223, monitoring the lost masses 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, summing the lost masses to obtain DM, namely the mass of cement ash conveyed per minute, refreshing the value in the next minute, wherein when the first cement ash tank 4 works alone, the lost mass in 1 minute is DM, when the first cement ash tank 4 is conveyed together with the second cement ash tank 5 after being suppressed, the DM value is the sum of the lost masses of the first cement ash tank 4 and the second cement ash tank 5, and when the first cement ash tank 4 stops working and the second cement ash tank 5 continues working, the DM value is the lost mass of the first cement ash tank 4 alone in 1 minute;
s224, knowing that the cement ash conveying amount in the unit time length required by the well cementation equipment 10 is M1 theoretically, calculating the mass of the cement ash required to be compensated in the unit time length DT to be M1-DM = CM, wherein the M1 value depends on the cement ash flow rate required by well cementation and can be set through working conditions, so that the cement ash conveying amount is known;
and S225, controlling the compensator 16 to add cement ash with the mass 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 amount of the first cement ash tank 4 and the second cement ash tank 5.
For example, if the cementing condition is that 10KG of cement ash needs to be delivered per minute, and actually 7KG is delivered within the 1 minute period, the compensator 16 needs to supplement 3KG in the next minute, i.e., M1=10KG, DM =7KG, CM =3KG, although the compensation lags behind 1min, but the fluctuation is not obvious in the 1h macro delivery period.
Since the cement ash conveying amount is generally downward, the effect of the lag is that the compensation value is always less than the required compensation value, so that the actual conveying amount curve is slowly downward, and in order to improve the lag, the mass DM2 to be compensated in the next time period is empirically or calculated, and the mass DM2 is slightly larger than the DM, and the mass DM2 is used for compensating the DM instead, as shown in FIG. 16.
In a preferred embodiment, the method further comprises the following steps:
s2251, since the capacities of the unit chambers 24 are equal, the opening degrees of the upper sliding door device 20 and the lower sliding door 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 corresponding lower sliding door device 21 needs to slide open by 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 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 degree of the lower sliding door device 21 according to the size CM, enabling cement ash in a part of the unit chambers 24 to fall into the buffer cavity 25, and then closing the lower sliding door device 21;
and S2254, opening the third air distributing valve 17 and the third ash valve 18, and conveying cement ash in the buffer cavity 25 to the well cementation equipment 10.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (9)
1. A continuous stable ash supply device for well cementation equipment is characterized in that: the cement mortar weighing device comprises an air supply device (2) and at least two cement mortar tanks, wherein a main air valve (3) is arranged at an air outlet of the air supply device (2), each cement mortar tank is communicated with the air outlet of the air supply device (2), the lower end of each cement mortar tank is connected with a weighing base, an air pressure monitor and a mortar valve are sequentially arranged at a discharge port of each cement mortar tank, and the discharge port of each cement mortar tank is communicated with well cementation equipment (10).
2. The continuous stable ash supplying apparatus for well cementing equipment according to claim 1, wherein: the air inlet of each cement mortar tank is provided with an air distributing valve, and the air inlet of each cement mortar tank is communicated with the air outlet of the air supply device (2).
3. The continuous stable ash supplying apparatus for well cementing equipment according to claim 2, wherein: the ash-storing and discharging device is further provided with a compensator (16), an ash-storing cavity (22) is arranged in the compensator (16), the compensator (16) is provided with an air inlet and a material outlet, the air inlet of the compensator (16) is provided with a third air distributing valve (17), and the material outlet of the compensator (16) is provided with a third ash valve (18).
4. The continuous stable ash supplying apparatus for well cementing equipment according to claim 3, wherein: ash storage chamber (22) below is equipped with partition frame (19), partition frame (19) below is equipped with buffer memory chamber (25), the air inlet intercommunication buffer memory chamber (25) upper end of compensator (16), the discharge gate intercommunication buffer memory chamber (25) lower extreme of compensator (16), both ends are equipped with upper sliding door device (20) and lower sliding door device (21) of adjustable aperture respectively about partition frame (19), both ends opening about partition frame (19), be equipped with a plurality of division boards (23) in partition frame (19), division board (23) separate partition frame (19) inner space be a plurality of unit room (24) that the volume equals.
5. The continuous stable ash supplying apparatus for well cementing equipment according to claim 4, wherein: the cement mortar well cementing device is also provided with a control system (1), wherein the control system (1) is electrically connected with the main air valve (3), the well cementing equipment (10), the upper sliding door device (20), the lower sliding door device (21), each gas distributing valve, each weighing base, each air pressure monitor and each ash valve.
6. The method for controlling a continuous and stable ash feeding device for well cementing equipment according to any one of claims 1 to 5, wherein:
s1, inputting the process parameters of each executive component;
s2, starting the gas supply device (2), and introducing cement ash into the well cementation equipment (10) through a plurality of cement ash tanks;
and S3, after the ash supply is finished, closing the air supply device (2), stopping the well cementation equipment (10), and supplementing cement ash into the first cement ash tank (4) and the second cement ash tank (5) for the next use.
7. The method for controlling a continuous stable ash supplying apparatus for well cementing equipment according to claim 6, wherein: s2 includes an ash supply method:
s211, opening a main gas valve (3), starting a gas supply device (2) to supply gas, and conveying cement ash in a first cement ash tank (4) to a well cementation device (10) by the gas supplied by the gas supply device (2) to prepare cement slurry;
s212, monitoring the weight of the first cement ash tank (4) in real time by the first weighing base (8), recording the weight of the first cement ash tank (4) as a time point T1 when the weight of the first cement ash tank (4) is lower than X1, closing the first ash valve (6), stopping conveying cement ash by the first cement ash tank (4), and starting suppressing pressure in the first cement ash tank (4);
s213, opening a second ash valve (7), and conveying the cement ash in a second cement ash tank (5) to the well cementation equipment (10) by the gas provided by the gas supply device (2);
s214, when the first air pressure monitor (12) monitors that the pressure in the first cement ash tank (4) is increased to Y1, recording the pressure as a time point T2, opening the first ash valve (6) according to the Z1% opening degree, and simultaneously starting to convey cement ash from the first cement ash tank (4) and the second cement ash tank (5);
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.
8. The method for controlling a continuous stable ash supplying apparatus for well cementing equipment according to claim 7, wherein: the cement ash supply method comprises a cement ash conveying amount compensation method:
s221, determining unit time length DT according to weight identification precision of the weighing base;
s222, dividing the cement ash conveying time period into a plurality of equal unit time lengths DT;
s223, monitoring the lost masses of the first cement mortar tank (4) and the second cement mortar 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 the conveying quantity of cement ash in a unit time length required by the well cementation equipment (10) is M1 theoretically, and calculating the mass of the cement ash 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 mass CM into the well cementation equipment (10) in the next unit time length DT to make up for the shortage of the total cement ash output amount of the first cement ash tank (4) and the second cement ash tank (5).
9. The method for controlling a continuous stable ash supplying apparatus for well cementing equipment according to claim 8, wherein: also included is a method of using the compensator (16):
s2251, linearly corresponding the opening degrees of the upper sliding door device (20) and the lower sliding door device (21) to the mass of cement ash to be compensated due to the equal capacity of each unit chamber (24);
s2252, opening the upper sliding door device (20) to the maximum to enable cement ash in the upper ash storage cavity (22) to fill each unit chamber (24) of the equal-division frame (19), and then closing the upper sliding door device (20) to separate the equal-division frame (19) from the ash storage cavity (22);
s2253, controlling the opening degree of the lower sliding door device (21) according to the size of CM, enabling cement ash in a part of the unit chambers (24) to fall into the buffer cavity (25), and then closing the lower sliding door device (21);
s2254, opening the third air distributing valve (17) and the third ash valve (18) and conveying cement ash in the buffer cavity (25) to the well cementation equipment (10).
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