CN112677316B - Well cementation slurry blending device, blending method and cleaning method thereof - Google Patents
Well cementation slurry blending device, blending method and cleaning method thereof Download PDFInfo
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- CN112677316B CN112677316B CN202011279068.XA CN202011279068A CN112677316B CN 112677316 B CN112677316 B CN 112677316B CN 202011279068 A CN202011279068 A CN 202011279068A CN 112677316 B CN112677316 B CN 112677316B
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Abstract
The invention discloses a well cementation slurry blending device and a blending method and a cleaning method thereof, wherein the well cementation slurry blending device comprises a metering water tank, a plunger pump and a slurry mixing tank, wherein an opening is formed in a mixer, an ash cover is covered on the opening, and the opening is arranged opposite to a water inlet of the mixer; the metering water tank is communicated with the mixer through a first clean water pump and a second clean water pump which are arranged in parallel, the slurry mixing tank and the plunger pump are communicated through a first sand pump and a second sand pump which are arranged in parallel, a twelfth valve, a densimeter and a nineteenth valve are sequentially arranged between the outlet of the first sand pump and the inlet of the slurry mixing tank, and an outlet pipe is connected between the densimeter and the nineteenth valve; the device also comprises a controller which is electrically connected with the clear water regulating valve, the dry ash regulating valve and the densimeter respectively. The well cementation slurry mixing efficiency can be improved, the cleaning efficiency of the operation manifold is improved, and the service life of equipment is prolonged.
Description
Technical Field
The invention belongs to the technical field of well cementation equipment, relates to a well cementation slurry blending device, a blending method of the well cementation slurry blending device and a cleaning method of the well cementation slurry blending device.
Background
Along with the expansion of the field of petroleum exploration and development, the well drilling technology is continuously improved, so that the progress of the well cementation technology is promoted, and the popularization and application of a new well cementation technology, a new process and a new material also promote the improvement of the well cementation operation level and the well cementation quality year by year. Cementing is the process of setting casing pipe to a predetermined depth inside the well and injecting cement slurry between the casing pipe and the well wall by means of cementing truck (sledge) to seal. Because the oil and gas well is hundreds of meters shallow and thousands of meters deep, even thousands of meters deep, the casing and the cement slurry need to bear the severe environment of high temperature and high pressure, and also need to bear the corrosion and the interference of underground oil, gas and water and other media, and various tests of yield increasing measures such as acidification, fracturing and the like in oil extraction operation. Therefore, various properties of the well cementation cement slurry (such as viscosity, rheological property, shear strength, uniformity, stability and the like) have a direct influence on the quality of well cementation. The water-cement ratio, the additive and the cement slurry mixing process are key factors for determining the performance of the well cementation cement slurry.
The well cementation construction needs a plurality of professional devices to be carried out jointly, such as a well cementation cement truck (prying), a cement discharging truck (used for conveying dry cement), a water supply truck (used for storing and transporting clear water and the like), an instrument truck (used for measuring various parameters in the construction) and the like. Through the investigation and analysis to each big oil field well cementation car (sled), carry out contrastive analysis to current manifold and washing flow, there are the following problems mainly: the equipments on the manifold of the cementing truck (sledge) can not be mutually standby, the cementing belongs to one-time irreversible engineering, and the success or failure of the cementing quality directly influences the success or failure of drilling one well. If some equipment on the manifold breaks down, the well cementation operation is interrupted, quality accidents are caused, and the whole well is scrapped. Before or after the well cementation operation is finished, the operation manifold needs to be cleaned. Key parts in the operation manifold are not cleaned completely and water consumption is high. The liquid level of the slurry mixing tank cannot be automatically controlled. The liquid level of the slurry mixing tank is judged by an operator through observation, so that the labor intensity is high and mistakes are easy to make. When cement slurry in the slurry mixing tank overflows, the field environment of well cementation construction operation is influenced. When cement slurry in the slurry mixing tank is sucked, the service life of equipment is shortened, quality accidents are caused, and the whole well is scrapped.
Disclosure of Invention
The invention aims to provide a well cementation slurry blending device, which solves the problem that the devices in the prior art cannot be mutually standby.
The technical scheme adopted by the invention is that the well cementation slurry blending device comprises a metering water tank, a plunger pump and a slurry mixing tank, wherein the outlet of the plunger pump is communicated with the inlet of the metering water tank; the metering water tank is communicated with the mixer through a first clean water pump and a second clean water pump which are arranged in parallel, the slurry mixing tank and the plunger pump are communicated through a first sand pump and a second sand pump which are arranged in parallel, a twelfth valve, a densimeter and a nineteenth valve are sequentially arranged between the outlet of the first sand pump and the inlet of the slurry mixing tank, and an outlet pipe is connected between the densimeter and the nineteenth valve; the device also comprises a controller which is electrically connected with the clear water regulating valve, the dry ash regulating valve and the densimeter respectively.
The invention is also characterized in that:
a twenty-first valve and a twenty-second valve are respectively arranged between the first sand pump and the slurry mixing tank and between the second sand pump and the slurry mixing tank; a fourteenth valve is arranged between the first sand pump and the plunger pump, and a seventeenth valve is arranged between the second sand pump and the plunger pump.
The metering water tank is communicated with the first sand pump in sequence through a pipeline, and a twentieth valve is arranged between the metering water tank and the first sand pump.
Be provided with the secondary on the blender and mix the thick liquid mouth, first sand pump passes through pipeline and secondary and mixes thick liquid mouth intercommunication, and is provided with the thirteenth valve between first sand pump, the blender.
The first clean water pump and the second clean water pump are communicated with the densimeter through a collecting pipeline, and an eighteenth valve is arranged between the collecting pipeline of the first clean water pump and the second clean water pump and the densimeter.
The outlet of the water metering tank is communicated with the inlet of the plunger pump through a pipeline, a tenth valve is arranged between the outlet of the water metering tank and the inlet of the plunger pump, and a third valve is arranged between the outlet of the plunger pump and the inlet of the water metering tank.
The second purpose of the invention is to provide a blending method of the well cementation slurry blending device.
The second technical scheme adopted by the invention is that a blending method of a well cementation slurry blending device adopts the well cementation slurry blending device, and comprises the following steps:
and (3) opening the first clean water pump or the second clean water pump, the clean water regulating valve, the dry ash regulating valve, the twenty-first valve, the first sand pump, the twelfth valve, the densimeter and the nineteenth valve, closing the twelfth valve when the densimeter displays that the density of the slurry in the slurry mixing tank meets the operation requirement, and simultaneously opening the fourteenth valve.
The third purpose of the invention is to provide a cleaning method of the well cementation slurry mixing device.
The third technical scheme adopted by the invention is that the cleaning method of the well cementation slurry mixing device is used for cleaning the well cementation slurry mixing device and comprises the following steps:
and 2, after the cleaning is finished, closing the third valve, and discharging waste liquid through a plunger pump.
The fourth purpose of the invention is to provide a cleaning method of the well cementation slurry mixing device.
The fourth technical scheme adopted by the invention is that the cleaning method of the well cementation slurry mixing device is used for cleaning the well cementation slurry mixing device and comprises the following steps:
step 2, after the cleaning is finished, closing the twentieth valve and the twenty-first valve, opening the twelfth valve, and discharging waste liquid through an outlet pipe;
and 3, opening the first clean water pump or the second clean water pump and the clean water regulating valve, cleaning the mixer again, and discharging waste liquid through the twelfth valve and the outlet pipe.
The fifth purpose of the invention is to provide a cleaning method of the well cementation slurry blending device.
The fifth technical scheme adopted by the invention is that the cleaning method of the well cementation slurry mixing device is used for cleaning the well cementation slurry mixing device and comprises the following steps:
and step 1, opening the twentieth valve, the first sand pump, the twelfth valve and the densimeter, cleaning the densimeter, discharging waste liquid through an outlet pipe, and then closing the twentieth valve and the first sand pump.
And 2, starting the first clear water pump or the second clear water pump and the eighteenth valve, cleaning the densimeter again, and discharging waste liquid through an outlet pipe.
The invention has the beneficial effects that:
according to the well cementation slurry blending device, the clean water pump and the sand pump are arranged in a double-pump mode, if one pump fails, the other pump is started rapidly to continue working, well cementation operation is guaranteed to be carried out continuously, well cementation operation risks are reduced, and accidents are avoided; the density meter is arranged, so that the density of the well cementation slurry can be accurately controlled, and the well cementation effect is further improved; the automatic control of the slurry mixing tank is realized by controlling the mixer and the slurry mixing tank through the controller. The blending method of the well cementation slurry blending device can realize automatic blending of well cementation slurry and improve the blending efficiency of the well cementation slurry. The invention relates to a cleaning method of a well cementation slurry blending device, which utilizes the pressure generated by the work of a clean water pump to be higher than that of a sand pump, firstly uses the sand pump to primarily clean a densimeter and a high-energy mixer, and then uses the clean water pump to thoroughly clean the densimeter and the high-energy mixer again, thereby improving the cleaning effect; cleaning local key equipment (such as a densimeter, a high-energy mixer and a high-pressure plunger pump) in the manifold, and directly cleaning by adopting clean water in a water metering tank; the defects of incomplete equipment cleaning, long cleaning time and large water consumption caused by circulating sewage are avoided; the cleaning efficiency of the operation manifold is improved, and the service life of the equipment is prolonged.
Drawings
FIG. 1 is a schematic structural view of a well cementing slurry blending device of the present invention;
FIG. 2 is a schematic view of the mixer of the cementing slurry preparation apparatus of the present invention;
FIG. 3 is a schematic structural view of a clean water manifold in the well cementing slurry preparation device of the present invention;
FIG. 4 is a schematic structural view of a slurry mixing manifold in the well cementing slurry preparation device according to the present invention;
FIG. 5 is a schematic structural view of a high pressure manifold in the well cementing slurry blending device of the present invention.
In the figure, 1, a metering water tank, 2, an external water supply joint I, 3, a first valve, 4, a second valve, 5, an external water supply joint II, 6, a third valve, 7, a fourth valve, 8, a first clean water pump, 9, a fifth valve, 10, a sixth valve, 11, a seventh valve, 12, an external water supply joint III, 13, an eighth valve, 14, a second clean water pump, 15, a ninth valve, 16, a fire-fighting joint, 17, a tenth valve, 18, a plunger pump, 19, an eleventh valve, 20, a twelfth valve, 21, a thirteenth valve, 22, a fourteenth valve, 23, a mixer, 23-1, a clean water regulating valve, 23-2, a dry ash regulating valve, 23-3, an ash inlet, 23-4, a water inlet, 23-5, 23-6, a secondary slurry mixing port, 24, a fifteenth valve, 25, a sixteenth valve, 26, a seventeenth valve, 27. the system comprises an eighteenth valve, 28, a densimeter, 29, a water discharge port, 30, a nineteenth valve, 31, a first sand pump, 32, a sewage discharge port, 33, a dredging port, 34, a twentieth valve, 35, a twenty-first valve, 36, a slurry mixing tank, 37, a twenty-second valve, 38, a second sand pump and 39, a liquid level meter.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
A well cementation mud blending device, as shown in figure 1, comprises a measuring water tank 1, a plunger pump 18 and a slurry mixing tank 36, wherein the outlet of the plunger pump 18 is communicated with the inlet of the measuring water tank 1, a mixer 23 is arranged on the slurry mixing tank 36, the outlet of the mixer 23 is communicated with the slurry mixing tank 36, as shown in figure 2, a clear water regulating valve 23-1 is arranged at a water inlet 23-4 of the mixer 23, and a dry ash regulating valve 23-2 is arranged at an ash inlet 23-3 of the mixer 23; the mixer 23 is provided with an opening 23-5, the opening 23-5 is covered with an ash cover, the position of the opening 23-5 is opposite to the water inlet of the mixer 23, because the water inlet can generate pressure, the dry cement ash can not be completely mixed with the clear water and can float to the outside to influence the operation environment, and the opening 23-5 is arranged to balance the pressure in the cavity of the mixer 23, so that the slurry mixing effect can be improved. As shown in fig. 3, the measuring water tank 1 is communicated with the mixer 23 through a first clean water pump 8 and a second clean water pump 14 which are arranged in parallel, a fifth valve 9 is arranged at an inlet pipe of the first clean water pump 8, a ninth valve 15 is arranged at an inlet pipe of the second clean water pump 14, a fourth valve 7 is arranged at an outlet pipe of the first clean water pump 8, and a sixth valve 10 is arranged at an outlet pipe of the second clean water pump 14. The second clean water pump 14 is connected with an external water supply connector III 12, and an eighth valve 13 is arranged between the second clean water pump 14 and the external water supply connector III 12; as shown in fig. 4, the slurry mixing tank 36 and the plunger pump 18 are communicated through a first sand pump 31 and a second sand pump 38 which are arranged in parallel, a twelfth valve 20, a densimeter 28 and a nineteenth valve 30 are sequentially arranged between the outlet of the first sand pump 31 and the inlet of the slurry mixing tank 36, and an outlet pipe 29 is connected between the densimeter 28 and the nineteenth valve 30; a fifteenth valve 24 is also arranged between the slurry mixing tank 36 and the plunger pump 18. The outlet of the first clean water pump 8 and the outlet of the second clean water pump 14 which are connected in parallel are provided with a fire-fighting joint 16. The device also comprises a controller which is respectively and electrically connected with the clear water regulating valve 23-1, the dry ash regulating valve 23-2 and the densimeter 28.
The water source of measurement water pitcher 1 includes external water supply joint I2, external water supply joint II 5, external water supply joint I2, external water supply joint II 5 all communicates through pipeline and measurement water pitcher 1, external water supply joint I2, be provided with first valve 3 between external water supply joint II 5 and the measurement water pitcher 1 respectively, second valve 4, if the outer water supply joint I2 of can not using of water supply car, use external water supply joint II 5 and can accomplish toward measuring water pitcher 1 interior water injection, the same reason, if the outer water supply joint II 5 of water supply car can not use, use external water supply joint I2 also can accomplish toward measuring water pitcher 1 interior water injection. The water meter is characterized by further comprising an external water supply connector III 12, the external water supply connector III 12 is communicated with a second clean water pump 14, an eighth valve 13 is arranged between the external water supply connector III 12 and the second clean water pump 14, a water outlet pipe of the second clean water pump 14 is communicated with the measuring water tank 1, a seventh valve 11 is arranged between a water outlet pipe of the second clean water pump 14 and the measuring water tank 1, and when the external water supply connector III 12 is used in a working site without water supply, the second clean water pump 14 is started to pressurize and accelerate a site water source to complete water injection of the measuring water tank 1.
Twenty-first valves 35 and twenty-second valves 37 are respectively arranged between the first sand pump 31 and the slurry mixing tank 36 and between the second sand pump 38 and the slurry mixing tank 36; a fourteenth valve 22 is arranged between the first sand pump 31 and the plunger pump 18, and a seventeenth valve 26 is arranged between the second sand pump 38 and the plunger pump 18. An eleventh valve 19 is arranged at the inlet of the plunger pump 18, and the eleventh valve 19 is positioned between the fourteenth valve 22, the seventeenth valve 26 and the plunger pump 18. The twelfth valve 20, the densimeter 28 and the nineteenth valve 30 are located between the first sand pump 31 and the slurry mixing tank 36. The dredging holes 33 are further formed between the first sand pump 31, the second sand pump 38 and the slurry mixing tank 36 respectively, and when the first sand pump 31 or the second sand pump 38 is blocked, the dredging holes 33 need to be opened for dredging.
The metering water tank 1 is sequentially communicated with the first sand pump 31 and the mixer 23 through pipelines, a fourteenth valve 22 is arranged between the first sand pump 31 and the mixer 23, and a sixteenth valve 25 and a twentieth valve 34 are arranged between the metering water tank 1 and the first sand pump 31. The mixer 23 is provided with a secondary slurry mixing port 23-6, the first sand pump 31 is also communicated with the secondary slurry mixing port 23-6 through a pipeline, and a thirteenth valve 21 is arranged between the first sand pump 31 and the mixer 23.
An outlet of the water metering tank 1 is communicated with an inlet of the plunger pump 18 through a pipeline, a tenth valve 17 is arranged between the outlet of the water metering tank 1 and the inlet of the plunger pump 18, and a third valve 6 is arranged between the outlet of the plunger pump 18 and the inlet of the water metering tank 1.
The first clear water pump 8 and the second clear water pump 14 are communicated with the densimeter 28 through a collecting pipeline, and an eighteenth valve 27 is arranged between the first clear water pump 8 and the densimeter 28 and between the second clear water pump 14 and the densimeter 28.
The bottom parts of the first sand pump 31 and the second sand pump 38 are provided with a sewage draining outlet 32. The drain 32 is located at the lowest position of the first sand pump 31 and the second sand pump 38, and residual cement slurry in a pipeline between the slurry mixing tank 36 and the first sand pump 31 or the second sand pump 38 can be thoroughly cleaned only by opening the drain 32; the first sand pump 31/second sand pump 38 suction port is disposed at the lowest position of the slurry tank 36.
A liquid level meter 39 is installed in the slurry tank 36, and the liquid level meter 39 is used for detecting the liquid level in the slurry mixing tank 36 and preventing the slurry from overflowing or being pumped out. A level meter 39 installed in the mud tank 36 detects a level signal of the cement slurry and transmits the signal to the controller, and compares the data with the level setting data while calculating the amount of clean water at that time with reference to the actual amount of discharged mud. And a control signal is output to a clear water control valve 23-1 of the high-energy mixer 23, so that the position of the clear water cylinder is adjusted to control the amount of clear water entering the slurry mixing tank 36, the liquid level height is maintained, and the automatic control of the liquid level is realized.
A blending method of a well cementation slurry blending device adopts the well cementation slurry blending device and comprises the following steps:
the fifth valve 9, the clean water pump 8, the fourth valve 7 (or the ninth valve 15, the second clean water pump 14, the sixth valve 10), the clean water regulating valve 23-1, the dry ash regulating valve 23-2, the twenty-first valve 35, the first sand pump 31, the twelfth valve 20, the densimeter 28 and the nineteenth valve 30 are opened, the first clean water pump 8/the second clean water pump 14 sucks clean water from the measuring water tank 1 and conveys the clean water to the water inlet of the high-energy mixer 23, meanwhile, the dry ash conveyed by the ash discharging truck is conveyed to the ash inlet of the high-energy mixer 23 through an ash inlet pipeline, the dry cement and the clean water are primarily mixed in the mixer 23, the cement slurry with uniform density cannot be obtained when the dry cement and the clean water are primarily mixed in the mixer 23, the cement slurry is required to be further mixed in the slurry mixing tank 36 through stirring by a stirring blade, the slurry in the slurry mixing tank 36 is pressurized by the first sand pump 31 and then passes through the densimeter 28, entering a high-energy mixer 23 to realize multiple circulation of cement slurry; while circulating, the computer can judge whether the density of the slurry in the slurry mixing tank 36 meets the operation requirement or not by detecting the numerical value of the densimeter 28; the density of the slurry in the slurry mixing tank 36 can be changed by adjusting the opening degrees of the clear water adjusting valve 23-1 and the dry ash adjusting valve 23-2 so as to meet the operation requirement. Specifically, the dry ash regulating valve 23-2 rotates clockwise or counterclockwise to control the opening area of the dry ash channel, thereby realizing the control of the dry ash amount; the clear water regulating valve 23-1 is a water valve baffle, water holes are uniformly distributed on the water valve baffle, and the valve core of the water valve rotates clockwise or anticlockwise to control the number of the through-flow water holes of the water valve baffle so as to realize the control of clear water flow. The valve core of the water valve and the valve core of the ash valve are mainly regulated in a hydraulic driving mode, the hydraulic pump provides a hydraulic source for the swing hydraulic cylinder, the opening degrees of the valve cores of the water valve and the ash valve are regulated by utilizing the servo proportional valve, and the flow and the density of well cementation slurry are accurately controlled through operation and comparison by detecting a series of data such as slurry density, clear water flow, the angles of the valve cores of the water valve and the ash valve and the like.
When the density of the slurry in the slurry mixing tank 36 is shown by the numerical value of the densimeter 28 to meet the operation requirement, the twelfth valve 20 is closed, the fifteenth valve 24 is opened, the cement slurry with the density meeting the requirement after being fully mixed is sucked by the high-pressure plunger pump 18 through the fifteenth butterfly valve 24, the fourteenth valve 22 is opened because the fluidity of the cement slurry is poor to avoid the occurrence of air suction of the high-pressure plunger pump 18, the slurry with the density meeting the requirement after being fully mixed is conveyed to the suction end of the high-pressure plunger pump 18 by the first sand pump 31, and is discharged out of the shaft by the high-pressure plunger pump 18 to complete the well cementation operation. If the first sand pump 31 cannot work normally, the eleventh valve 35 and the first sand pump 31 are closed, the twentieth valve 37, the second sand pump 38 and the seventeenth valve 26 are opened, and slurry is delivered to the suction end of the high-pressure plunger pump 18 through the second sand pump 38. As shown in figure 5, 2 branches are led out from the outlet of the high-pressure plunger pump 18, one branch is conveyed to a shaft for well cementation operation, and the other branch is used for pressure relief and backflow check well cementation process. If backflow occurs in the shaft, high-pressure liquid in the shaft flows back into the metering tank 1 through the high-pressure manifold through the high-pressure plunger pump 18.
Example 1
A cleaning method of a well cementation slurry mixing device is used for cleaning the well cementation slurry mixing device and comprises the following steps:
step 1, opening a fifth valve 9, a clean water pump 8, a fourth valve 7 (or opening a ninth valve 15, a second clean water pump 14 and a sixth valve 10), a clean water regulating valve 23-1, a twenty-first valve 35, a first sand pump 31, a fourteenth valve 22, a twenty-second valve 37, a second sand pump 38, a seventeen valve 26 and a third valve 6; the water in the measuring water tank 1 sequentially passes through the first clear water pump 8 or the second clear water pump 14, the high-energy mixer 23, the slurry mixing tank 36, the first sand pump 31 or the second sand pump 38 to enter the high-pressure plunger pump 18, and finally returns to the measuring water tank 1 to complete the cleaning of the whole well cementation pipeline; after the cleaning path is completed by 'the metering water tank 1, the first clear water pump 8 or the second clear water pump 14, the high-energy mixer 23, the slurry mixing tank 36, the first sand pump 31 or the second sand pump 38, the high-pressure plunger pump 18 and the metering water tank 1', the third valve 6 is closed, and waste liquid is discharged through the plunger pump 18.
Cleaning a local pipeline:
example 2
and 2, after the cleaning is finished, closing the twentieth valve 34 and the twenty-first valve 35, opening the twelfth valve 20, and discharging waste liquid through the outlet pipe 29.
And 3, if the mixer 23 is caked more and the first sand pump 31 cannot be thoroughly washed, opening the fifth valve 9 or the ninth valve 15, the first clean water pump 8 or the second clean water pump 14, the fourth valve 7 or the sixth valve 10 and the clean water regulating valve 23-1, cleaning the mixer 23 again, and discharging waste liquid through the twelfth valve 20 and the outlet pipe 29. The cleaning path is 'measuring water tank 1-first clean water pump 8 or second clean water pump 14-high energy mixer 23-slurry mixing tank 36-first sand pump 31-discharge port 29'.
Example 3
step 2, the agglomerated cement slurry may remain in the channel of the densimeter 28, so that the channel of the densimeter 28 is narrowed, the flow fluctuation of the cement slurry in the channel is increased, and the display reading is abnormal; the fifth valve 9 or the ninth valve 15, the first clean water pump 8 or the second clean water pump 14, the fourth valve 7 or the sixth valve 10 and the eighteenth valve 27 are opened, the densimeter 28 is cleaned again, and waste liquid is discharged through an outlet pipe 29; the cleaning path is "the measuring water tank 1-the first clean water pump 8 or the second clean water pump 14-the densimeter 28-the drain 29". Since the operating pressure of the first and second clean water pumps 8, 14 is higher than that of the first sand pump 31, the residue which cannot be removed by the first sand pump 31 can be washed.
Example 4
and 2, after the cleaning is finished, closing the third valve 6, and discharging waste liquid through the plunger pump 18.
Through the mode, the clear water pump and the sand pump are arranged in a double-pump mode, if one pump fails, the other pump is quickly started to continue working, the well cementation operation is ensured to be continuously carried out, the risk of the well cementation operation is reduced, and accidents are avoided; the density meter is arranged, so that the density of the well cementation slurry can be accurately controlled, and the well cementation effect is further improved. The blending method of the well cementation slurry blending device can realize automatic blending of well cementation slurry and improve the blending efficiency of the well cementation slurry. The invention relates to a cleaning method of a well cementation slurry blending device, which utilizes the pressure generated by the work of a clean water pump to be higher than that of a sand pump, firstly uses the sand pump to primarily clean a densimeter and a high-energy mixer, and then uses the clean water pump to thoroughly clean the densimeter and the high-energy mixer again, thereby improving the cleaning effect; cleaning local key equipment (such as a densimeter, a high-energy mixer and a high-pressure plunger pump) in the manifold, and directly cleaning by adopting clean water in a water measuring tank. The defects of incomplete equipment cleaning, long cleaning time and large water consumption caused by circulating sewage are avoided. The cleaning efficiency of the operation manifold is improved, and the service life of the equipment is prolonged.
Claims (6)
1. A well cementation mud blending device is characterized by comprising a metering water tank (1), a plunger pump (18) and a slurry mixing tank (36), wherein an outlet of the plunger pump (18) is communicated with an inlet of the metering water tank (1), a mixer (23) is arranged on the slurry mixing tank (36), an outlet of the mixer (23) is communicated with the slurry mixing tank (36), a water inlet of the mixer (23) is provided with a clear water regulating valve (23-1), an ash inlet of the mixer (23) is provided with a dry ash regulating valve (23-2), an opening (23-5) is formed in the mixer (23), an ash cover is covered on the opening (23-5), and the opening (23-5) is arranged opposite to a water inlet of the mixer (23); the metering water tank (1) is communicated with the mixer (23) through a first clean water pump (8) and a second clean water pump (14) which are arranged in parallel, the slurry mixing tank (36) and the plunger pump (18) are communicated through a first sand pump (31) and a second sand pump (38) which are arranged in parallel, a twelfth valve (20), a densimeter (28) and a nineteenth valve (30) are sequentially arranged between an outlet of the first sand pump (31) and an inlet of the slurry mixing tank (36), and an outlet pipe (29) is connected between the densimeter (28) and the nineteenth valve (30); the device also comprises a controller which is respectively and electrically connected with the clear water regulating valve (23-1), the dry ash regulating valve (23-2) and the densimeter (28); a twenty-first valve (35) and a twenty-second valve (37) are respectively arranged between the first sand pump (31), the second sand pump (38) and the slurry mixing tank (36); a fourteenth valve (22) is arranged between the first sand pump (31) and the plunger pump (18), and a seventeenth valve (26) is arranged between the second sand pump (38) and the plunger pump (18); the metering water tank (1) is sequentially communicated with the first sand pump (31) through a pipeline, and a twentieth valve (34) is arranged between the metering water tank (1) and the first sand pump (31); a secondary slurry mixing port (23-6) is formed in the mixer (23), the first sand pump (31) is communicated with the secondary slurry mixing port (23-6) through a pipeline, and a thirteenth valve (21) is arranged between the first sand pump (31) and the mixer (23); the first clean water pump (8) and the second clean water pump (14) are communicated with the densimeter (28) through a collecting pipeline, and an eighteenth valve (27) is arranged between the collecting pipeline of the first clean water pump (8) and the second clean water pump (14) and the densimeter (28).
2. The well cementation mud blending device according to claim 1, wherein an outlet of the water metering tank (1) is communicated with an inlet of the plunger pump (18) through a pipeline, a tenth valve (17) is arranged between the outlet of the water metering tank (1) and the inlet of the plunger pump (18), and a third valve (6) is arranged between the outlet of the plunger pump (18) and the inlet of the water metering tank (1).
3. A blending method of a well cementation mud blending device is characterized in that the well cementation mud blending device of claim 1 is adopted, and comprises the following steps:
the method comprises the steps that the first clear water pump (8) or the second clear water pump (14), a clear water regulating valve (23-1), a dry ash regulating valve (23-2), a twenty-first valve (35), a first sand pump (31), a twelfth valve (20), a densimeter (28) and a nineteenth valve (30) are opened, when the density of mud in a mud mixing tank (36) is displayed by the numerical value of the densimeter (28) and meets the operation requirement, the twelfth valve (20) is closed, and meanwhile, the fourteenth valve (22) is opened.
4. A cleaning method of a well cementation slurry mixing device, which is characterized in that the cleaning method of the well cementation slurry mixing device of claim 1 comprises the following steps:
step 1, starting a first clear water pump (8) or a second clear water pump (14), a clear water regulating valve (23-1), a twenty-first valve (35), a first sand pump (31), a fourteenth valve (22), a twenty-second valve (37), a second sand pump (38), a seventeen valve (26) and a third valve (6);
and 2, after the cleaning is finished, closing the third valve (6), and discharging waste liquid through a plunger pump (18).
5. A cleaning method of a well cementation slurry mixing device, which is characterized in that the cleaning method of the well cementation slurry mixing device of claim 1 comprises the following steps:
step 1, opening a twentieth valve (34), a first sand pump (31) and a thirteenth valve (21), and cleaning a mixer (23);
step 2, after the cleaning is finished, closing a twentieth valve (34) and a twenty-first valve (35), opening a twelfth valve (20), and discharging waste liquid through an outlet pipe (29);
and 3, starting the first clear water pump (8) or the second clear water pump (14) and the clear water regulating valve (23-1), cleaning the mixer (23) again, and discharging waste liquid through the twelfth valve (20) and the outlet pipe (29).
6. A cleaning method of a well cementation slurry mixing device, which is characterized in that the cleaning method of the well cementation slurry mixing device of claim 1 comprises the following steps:
step 1, opening a twentieth valve (34), a first sand pump (31), a twelfth valve (20) and a densimeter (28), cleaning the densimeter (28), discharging waste liquid through an outlet pipe (29), and then closing the twentieth valve (34) and the first sand pump (31);
and 2, starting the first clear water pump (8) or the second clear water pump (14) and the eighteenth valve (27), cleaning the densimeter (28) again, and discharging waste liquid through an outlet pipe (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011279068.XA CN112677316B (en) | 2020-11-16 | 2020-11-16 | Well cementation slurry blending device, blending method and cleaning method thereof |
Applications Claiming Priority (1)
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| CN2339291Y (en) * | 1998-07-01 | 1999-09-22 | 四机赛瓦石油钻采设备有限公司 | High-energy mixer |
| CN201895357U (en) * | 2010-11-23 | 2011-07-13 | 宝鸡宝石特种车辆有限责任公司 | Novel high-energy mixer |
| JP5893288B2 (en) * | 2011-08-11 | 2016-03-23 | オル・ジャパン株式会社 | Mixer water supply and washing method |
| CN202753286U (en) * | 2012-07-24 | 2013-02-27 | 苏州鼎恩建材科技有限公司 | Liquid raw material feeding device for producing concrete additives |
| CN203640678U (en) * | 2013-01-08 | 2014-06-11 | 湖北中油科昊机械制造有限公司 | Novel cement discharging device for cementing truck |
| US10316618B2 (en) * | 2015-12-14 | 2019-06-11 | Bj Services, Llc | System and method of customizable material injection for well cementing |
| CN205477517U (en) * | 2015-12-22 | 2016-08-17 | 中原特种车辆有限公司 | Well cementation device |
| CN205991333U (en) * | 2016-08-31 | 2017-03-01 | 四川宝石机械专用车有限公司 | A kind of bidirectional multifunctional mixture manifold system being applied to cementing unit |
| CN108687954A (en) * | 2018-05-07 | 2018-10-23 | 烟台杰瑞石油装备技术有限公司 | A kind of hybrid system of efficient well cementing operation |
| CN109078900B (en) * | 2018-09-10 | 2020-07-14 | 中国石油化工集团有限公司 | Well cementation car pipeline cleaning process |
| CN111155961B (en) * | 2020-01-09 | 2022-05-13 | 宝鸡石油机械有限责任公司 | Electrically driven well cementation cement truck |
| CN111173476A (en) * | 2020-01-20 | 2020-05-19 | 烟台杰瑞石油装备技术有限公司 | Novel super large discharge capacity superhigh pressure well cementation equipment |
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