CN115126430A - High-density drilling fluid treatment device - Google Patents
High-density drilling fluid treatment device Download PDFInfo
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- CN115126430A CN115126430A CN202210931408.5A CN202210931408A CN115126430A CN 115126430 A CN115126430 A CN 115126430A CN 202210931408 A CN202210931408 A CN 202210931408A CN 115126430 A CN115126430 A CN 115126430A
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- 239000012530 fluid Substances 0.000 title claims abstract description 200
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- 238000011084 recovery Methods 0.000 claims abstract description 18
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- 239000007791 liquid phase Substances 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims description 50
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- 238000012544 monitoring process Methods 0.000 claims description 20
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- 239000013049 sediment Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 5
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
- E21B21/066—Separating solids from drilling fluids with further treatment of the solids, e.g. for disposal
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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- Earth Drilling (AREA)
Abstract
The invention provides a high-density drilling fluid treatment device, relates to the technical field of oil and gas field drilling engineering, and solves the problems that manual tank cleaning is adopted in most of existing well teams, workers need to go into a tank to work, and labor intensity is high and working efficiency is low. The device includes that the drilling fluid prepares the jar, prevent subsiding mechanism and separation recovery mechanism, prevent subsiding the mechanism and set up inside mud jar and prevent subsiding mechanism and drilling fluid and prepare jar intercommunication, the drilling fluid in the drilling fluid prepares jar can be through preventing subsiding the mechanism blowout and being in the suspended state to the mud jar in order to make the subsides of mud jar bottom in, be equipped with separation recovery mechanism between mud jar and the drilling fluid prepares the jar, separation recovery mechanism can flow the drilling fluid in it to the mud jar and separate and can carry the liquid phase and the part solid phase that separates to the drilling fluid prepares the jar. The invention can avoid the sedimentation of the weighting agent of the high-density drilling fluid, realize the recovery of the weighting agent, greatly reduce the labor intensity of workers and improve the production operation efficiency.
Description
Technical Field
The invention relates to the technical field of oil and gas field drilling engineering, in particular to a high-density drilling fluid treatment device.
Background
The drilling fluid is a general term for various circulating fluids which meet the requirements of drilling work in multiple functions in the drilling process. The drilling fluid is the blood of the well drilling, also called the drilling flushing fluid, and plays an important role in the well drilling operation.
The drilling circulation has the requirements of low pump pressure (low viscosity), strong sand carrying capacity (high dynamic shear), low starting pump pressure (low static shear), good lubricating property, low friction and small abrasion (few solid particles) on the drilling fluid. The pressure column of the drilling fluid is used for balancing the pressure of the stratum drilled through, and the density of the drilling fluid is stable; when drilling hydrocarbon reservoir, the pressure of oil and gas is balanced by the pressure column of drilling fluid, and the density of drilling fluid is required to be proper. Drilling fluids are required to have properties to overcome unstable formations, such as shrinkage of the wellbore caused by water swelling of mudstone; conglomerates and volcanic rocks are collapsed when meeting water, salt rocks form karst caves when meeting water, and the like, namely drilling fluids with different properties are required.
In the drilling process, in order to balance the formation pressure and maintain the stability of the well wall, high-density weighting agents such as barite, iron ore powder and the like are generally required to be added into the drilling fluid. With the increasing drilling of deep wells and ultra-deep wells, the requirement on the density of drilling fluid is higher and higher, and the problem of the settlement of the weighting agent of the high-density drilling fluid is more and more prominent, which has become a main factor influencing the drilling speed and the drilling safety.
According to research, when high-density drilling fluid flows at a low speed in a mud tank, weighting agent sedimentation is easy to occur, and tank bottom sedimentation can cause the volume of the mud tank to be reduced and the volume of the drilling fluid to be measured inaccurately if not processed in time; the density of the drilling fluid is reduced, and the problems of complex underground accidents and the like are easily caused. Therefore, the settling at the bottom of the mud tank needs to be treated periodically on site.
At present, a manual tank cleaning method is mostly adopted by a well team, workers need to go into a tank to work, however, the applicant finds that the existing manual tank cleaning method at least has the following technical problems:
when workers enter the mud tank to remove sediments at the bottom of the tank, drilling fluid in the tank needs to be emptied, the utilization rate of the mud tank is reduced, the problems of high labor intensity, poor operation environment, low working efficiency, serious weighting agent waste and the like exist, potential safety hazards exist, the requirements of HSE (high speed, environmental and environmental) management and safety production are not facilitated, the weighting agent is lost due to the fact that sediments such as the weighting agent removed in the tank are directly discharged outwards, and the using amount of the treating agent and the drilling cost are increased.
Disclosure of Invention
In view of this, the invention aims to provide a high-density drilling fluid processing device, which aims to solve the technical problems that in the prior art, manual tank cleaning is mostly adopted in a drilling team, workers need to put into a tank to work, and the labor intensity is high and the working efficiency is low.
In order to achieve the above object, the present invention provides a high density drilling fluid processing apparatus, comprising a drilling fluid preparation tank, an anti-settling mechanism and a separation recovery mechanism, wherein:
the anti-settling mechanism is arranged inside the mud tank and communicated with the drilling fluid preparation tank, drilling fluid in the drilling fluid preparation tank can be sprayed into the mud tank through the anti-settling mechanism so that sediments at the bottom of the mud tank are in a suspension state, the separation and recovery mechanism is arranged between the mud tank and the drilling fluid preparation tank, and can separate the drilling fluid flowing into the mud tank from the mud tank and convey the separated liquid phase and part of the separated solid phase to the drilling fluid preparation tank.
As a further improvement of the present invention, the anti-settling mechanism includes a high-pressure pipeline structure and a jet nozzle, the high-pressure pipeline structure is disposed inside the mud tank, a fluid channel allowing a fluid to pass through is formed in the high-pressure pipeline, one end of the fluid channel is communicated with the drilling fluid preparation tank through a pumping structure, the jet nozzle is disposed along a circumferential direction of the high-pressure pipeline structure, and the drilling fluid in the drilling fluid preparation tank can enter the fluid channel through the pumping structure and can be ejected into the mud tank through the jet nozzle.
As a further improvement of the invention, the high-pressure pipeline structure is laid inside the mud tank in an S shape, and the jet nozzles are arranged in a staggered mode in the circumferential direction of the high-pressure pipeline structure.
As a further improvement of the invention, the distance between the bottom of the high-pressure pipeline structure and the upper surface of the bottom of the slurry tank is 10-15 cm, and the jet nozzle is in a duckbill shape.
As a further improvement of the present invention, the pumping structure comprises a first sand pump, a preparation tank connecting pipe and a high-pressure pipeline connecting pipe, wherein an inlet end of the first sand pump is communicated with the drilling fluid preparation tank through the preparation tank connecting pipe, an outlet end of the first sand pump is communicated with the high-pressure pipeline structure through the high-pressure pipeline connecting pipe, a first installation through hole for installing the high-pressure pipeline connecting pipe is arranged on a side wall of the mud tank, and the first installation through hole is located at a lower position of the mud tank.
As a further improvement of the present invention, the separation and recovery mechanism includes a sand remover and a vibrating screen, the sand remover is communicated with the mud tank through a sand pump structure, the vibrating screen is communicated with the sand remover, the drilling fluid in the mud tank can be pumped into the sand remover through the sand pump structure, the drilling fluid subjected to solid-liquid separation by the sand remover is delivered to the drilling fluid preparation tank, the solid phase subjected to solid-liquid separation by the sand remover can be delivered to the vibrating screen, and the weighting agent screened by the vibrating screen can be delivered to the drilling fluid preparation tank.
As a further improvement of the present invention, the sand pump structure comprises a second sand pump, a mud tank connecting pipe and a desander connecting pipe, wherein an inlet end of the second sand pump is communicated with the mud tank through the mud tank connecting pipe, an outlet end of the second sand pump is communicated with the desander through the desander connecting pipe, a second mounting through hole for mounting the mud tank connecting pipe is arranged on a side wall of the mud tank, and the second mounting through hole is located at an upper position of the mud tank.
As a further improvement of the invention, a stirring structure is arranged in the drilling fluid preparation tank, wherein the stirring structure comprises a power device, a stirring shaft and stirring blades, the output end of the power device is connected with the stirring shaft, at least part of the section of the stirring shaft is arranged in the drilling fluid preparation tank, and the stirring blades are arranged at the lower end of the stirring shaft and form a gap with the bottom of the drilling fluid preparation tank.
As a further improvement of the invention, the high-density drilling fluid treatment device further comprises a drilling fluid settlement monitoring mechanism and a PLC, wherein the drilling fluid settlement monitoring mechanism is installed in the mud tank and used for detecting the density difference between the upper-layer drilling fluid and the lower-layer drilling fluid in the mud tank, the drilling fluid settlement monitoring mechanism is connected with the PLC, the PLC is connected with the pumping structure, the drilling fluid settlement monitoring mechanism can output an electric signal to the PLC when the density difference between the upper-layer drilling fluid and the lower-layer drilling fluid in the mud tank exceeds a preset value, and the PLC controls the pumping structure to be started.
As a further improvement of the invention, the drilling fluid settlement monitoring mechanism adopts a capacitive pressure transmitter.
The invention provides a high-density drilling fluid treatment device, which comprises a drilling fluid preparation tank, an anti-settling mechanism and a separation and recovery mechanism, wherein in the working process, after solid phase deposition of weighting agents and the like occurs in a mud tank, drilling fluid in the drilling fluid preparation tank can be sprayed into the mud tank through the anti-settling mechanism to impact sediments at the bottom of the mud tank, so that sediments at the bottom of the mud tank are in a suspension state, and the sediments of the weighting agents and the like settled at the bottom of the mud tank can be brought back to the drilling fluid again; at the moment, the high-density drilling fluid which is cyclone at the bottom of the mud tank can be pumped into the separation and recovery mechanism, the drilling fluid flowing into the mud tank can be subjected to solid-phase separation through the separation and recovery mechanism, the separated liquid phase and the small-particle weighting agent can be conveyed to the drilling fluid preparation tank in a solid phase manner, and the liquid phase and the small-particle weighting agent are uniformly dispersed in the drilling fluid again. The invention realizes the functions of circulating treatment and recycling of the weighting agent of the high-density drilling fluid, avoids the sedimentation of the weighting agent of the high-density drilling fluid, improves the sedimentation stability of the drilling fluid, can greatly reduce the labor intensity of workers, eliminate potential safety hazards, improve the production operation efficiency, obviously improve the working environment of the workers and save the drilling cost and the labor cost; the waste of weighting materials and the maintenance frequency of workers on the performance of the drilling fluid are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a high density drilling fluid treatment device provided by an embodiment of the present invention;
FIG. 2 is another schematic structural diagram of a high density drilling fluid treatment device provided by an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a mud tank provided by an embodiment of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 3;
figure 5 is a schematic diagram of a duckbill structure provided by an embodiment of the present invention.
Reference numerals are as follows: 1. a mud tank; 2. a drilling fluid preparation tank; 3. a high pressure line; 4. a jet nozzle; 41. a first nozzle; 42. a second nozzle; 5. a desander; 6. vibrating screen; 7. pumping the structure; 71. a first sand pump; 72. preparing a tank connecting pipe; 73. a high-pressure pipeline connecting pipe; 8. a sand pump structure; 81. a second sand pump; 82. a mud tank connecting pipe; 83. a desander connecting pipe; 9. a stirring structure; 91. a power plant; 92. a stirring shaft; 93. a stirring blade; 10. a capacitive pressure transmitter; 101. an upper sensor; 102. a lower layer sensor; 11. and (4) controlling the valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
Referring to fig. 1 to 5, the invention provides a high-density drilling fluid treatment device, which comprises a drilling fluid preparation tank 2, an anti-settling mechanism and a separation and recovery mechanism, wherein the anti-settling mechanism is arranged inside a mud tank 1 and is communicated with the drilling fluid preparation tank 2, drilling fluid in the drilling fluid preparation tank 2 can be sprayed into the mud tank 1 through the anti-settling mechanism so that sediments at the bottom of the mud tank 1 are in a suspension state, the separation and recovery mechanism is arranged between the mud tank 1 and the drilling fluid preparation tank 2 and can separate the drilling fluid flowing into the mud tank 1 and can convey a separated liquid phase and a part of solid phase to the drilling fluid preparation tank 2.
In the working process, after the mud tank 1 is subjected to solid phase deposition of weighting agent and the like, drilling fluid in the drilling fluid preparation tank 2 can be sprayed into the mud tank 1 through the anti-settling mechanism, and can impact sediments at the bottom of the mud tank 1 to enable sediments at the bottom of the mud tank 1 to be in a suspended state, so that the sediments of the weighting agent and the like settled at the bottom of the mud tank 1 can be brought back to the drilling fluid again; at the moment, the high-density drilling fluid in the rotational flow at the bottom of the mud tank 1 can be pumped into the separation and recovery mechanism, the drilling fluid flowing into the mud tank 1 can be subjected to solid-phase separation through the separation and recovery mechanism, and the separated liquid phase (including the weighting agent) can be conveyed to the drilling fluid preparation tank 2 and is uniformly dispersed in the drilling fluid again. The invention realizes the cyclic treatment and the recycling of the weighting agent of the high-density drilling fluid, avoids the sedimentation of the weighting agent of the high-density drilling fluid, improves the sedimentation stability of the drilling fluid, can greatly reduce the labor intensity of workers, eliminate potential safety hazards, improve the production operation efficiency, obviously improve the working environment of the workers and save the drilling cost and the labor cost; the waste of weighting materials and the maintenance frequency of workers on the performance of the drilling fluid are avoided.
In this embodiment, prevent subsiding the mechanism and include 3 structures of high-pressure line and jet nozzle 4, 3 structures of high-pressure line set up and are formed with the fluid passage that allows fluid to pass through in mud tank 1 inside and high-pressure line 3, fluid passage's one end is linked together with drilling fluid preparation jar 2 through pump income structure 7, be provided with jet nozzle 4 along the circumferential direction of 3 structures of high-pressure line, drilling fluid in the drilling fluid preparation jar 2 can enter into fluid passage and can spout to mud tank 1 in through jet nozzle 4 at a high speed through pump income structure 7 in, take sediment such as weighting agent that subsides 1 bottom of mud tank back to the drilling fluid again.
Specifically, high-pressure pipeline 3 structure includes three high-pressure pipeline 3, lays inside mud tank 1 for "S" type, has arranged jet nozzle 4 on high-pressure pipeline 3 dislocation to the at mud tank 1 bottom at utmost realizes submerging the efflux and floating the deposit. The distance between the bottom of the high-pressure pipeline 3 and the upper surface of the bottom of the mud tank 1 is 10-15 cm, and the jet nozzle 4 is in a duckbill shape, so that a larger jet impact area can be obtained on one hand; on the other hand, the upper jet nozzle 4 of the high-pressure pipeline 3 can be effectively prevented from being blocked. The spraying speed and the distance between the high-pressure pipelines 3 can be designed according to actual conditions, and preferably, as shown in fig. 4, the jet nozzle 4 in the embodiment comprises a first nozzle and a second nozzle, the first nozzle is arranged at the upper position of the high-pressure pipeline 3, and the spraying direction of the first nozzle forms an angle of 45 degrees with the horizontal plane; the second nozzle is arranged at the lower part of the high-pressure pipeline 3, the included angle between the liquid spraying direction and the horizontal plane is 25 degrees, the requirement of the jet flow on the suspension of the sediment is met, and the blockage of the weighting agent on the jet nozzle 4 due to the sedimentation can be effectively prevented.
The jet nozzle 4 arranged on the high-pressure pipeline 3 adopts a special angle jetting and staggered installation mode, so that on one hand, the jet nozzle 4 can be ensured to better and more comprehensively jet the sedimentation weighting agent in the mud tank 1; on the other hand, the jet nozzles 4 form jet vortexes with each other, so that the sedimentation weighting agent is resuspended and gradually recovered according to the circulation period of the drilling fluid.
Go into structure 7 and include first sand pump 71, make up a jar connecting pipe 72 and high-pressure line connecting pipe 73, the entry end of first sand pump 71 is linked together through making up a jar connecting pipe 72 and drilling fluid preparation jar 2, the exit end of first sand pump 71 is linked together through high-pressure line connecting pipe 73 and high-pressure line 3 structure, be provided with the first installation through-hole that is used for installing high-pressure line connecting pipe 73 on the lateral wall of mud jar 1, first installation through-hole is located the lower part position department of mud jar 1, more be favorable to floating the deposit.
In this embodiment, separation recovery mechanism includes desander 5 and shale shaker 6, desander 5 is linked together through sand pump structure 8 and mud jar 1, shale shaker 6 is linked together with desander 5, the drilling fluid in mud jar 1 can be gone into desander 5 and carry out the liquid phase after solid-liquid separation to drilling fluid preparation jar 2 through sand pump structure 8 pump, the solid phase after solid-liquid separation can be carried to shale shaker 6 through desander 5, the granule weighting agent solid phase through 6 screenings of shale shaker can be carried to in the drilling fluid preparation jar 2, the large granule solid phase that sieves out is then discharged to the waste material district. Pumping the high-density drilling fluid swirled at the bottom of the mud tank 1 into a desander 5 by using a sand pump structure 8, removing the particle drilling cuttings by using the desander 5, and recovering the weighting agent by using a vibrating screen 6; the recovered weighting agent reenters the drilling fluid preparation tank 2 through the vibrating screen 6 and is uniformly dispersed in the drilling fluid again.
Wherein, the sand pump structure 8 in this embodiment includes the second sand pump 81, mud tank connecting pipe 82 and desander connecting pipe 83, the entry end of the second sand pump 81 is linked together with the mud tank 1 through the mud tank connecting pipe 82, the exit end of the second sand pump 81 is linked together with the desander 5 through the desander connecting pipe 83, be provided with the second installation through-hole that is used for installing the mud tank connecting pipe 82 on the lateral wall of the mud tank 1, the second installation through-hole is located the upper portion position department of the mud tank 1. In addition, the control valves 11 are provided in both the high-pressure line connection pipe 73 and the desander connection pipe 83, and control the flow state of the liquid in the respective connection pipes.
The recovered weighting agent re-enters the drilling fluid preparation tank 2 provided with a stirring structure 9 through the vibrating screen 6, and the stirring structure 9 is arranged inside the drilling fluid preparation tank. And then, the components such as a curing agent and the like are added into the drilling fluid preparation tank 2 to prepare new drilling fluid. Specifically, stirring structure 9 includes power device 91, (mixing) shaft 92 and stirring vane 93, and power device 91's output is connected with (mixing) shaft 92 and (mixing) shaft 92's at least part district section sets up in drilling fluid preparation jar 2, stirring vane 93 set up in the lower extreme of (mixing) shaft 92 and with the drilling fluid prepare jar 2 bottoms between be equipped with the clearance for stir the medium in the drilling fluid preparation jar 2, get into next well drilling circulation and continue to use, realized from this that the drilling fluid does not fall to the ground the circulation and uses.
In addition, high density drilling fluid processing apparatus still includes drilling fluid settlement monitoring mechanism and PLC, utilizes the interior liquid differential pressure principle of jar to carry out automatic monitoring system design, realizes that the drilling fluid subsides the automatic monitoring of stability and prevents sinking.
When the high-density drilling fluid weighting agent is settled in the mud tank 1, the density of the drilling fluid at the lower layer in the tank is high, and the density of the drilling fluid at the upper layer in the tank is low. The drilling fluid settlement monitoring mechanism is arranged in the mud tank 1 and used for detecting the density difference between the upper-layer drilling fluid and the lower-layer drilling fluid in the mud tank 1, the drilling fluid settlement monitoring mechanism is connected with a PLC (programmable logic controller), the PLC is connected with the pumping structure 7, the drilling fluid settlement monitoring mechanism in the embodiment adopts a capacitive pressure transmitter 10 to automatically monitor the density difference between the upper layer and the lower layer of the drilling fluid in the mud tank 1, and the density difference between the upper-layer drilling fluid and the lower-layer drilling fluid in the mud tank 1 exceeds a preset value (delta rho is more than or equal to 0.2 g/cm) 3 ) During the process, the drilling fluid settlement monitoring mechanism can output an electric signal to the PLC, the first sand pump 71 is started, and the pumped clean drilling fluid is sprayed out through the pipeline structure and the jet nozzle 4 on the pipeline structure, so that the high-density drilling fluid at the bottom of the mud tank 1 is formed into a high-density drilling fluidThe upward flowing submerged jet flow enables the drilling fluid on the upper layer and the lower layer in the mud tank 1 to be uniformly mixed, thereby avoiding the settlement of the weighting agent and improving the settlement stability of the drilling fluid.
The capacitive pressure transmitter 10 installed at a fixed position in the mud tank 1 mainly comprises a dashboard, a transmission line, a transmitter, an upper sensor 101 and a lower sensor 102. The working principle is that when the measured differential pressure delta P acts on the metal diaphragms of the upper sensor 101 and the lower sensor 102, the diaphragms generate small displacement delta d to cause the capacitance of the differential capacitor to change, and then the change of the capacitance is converted into a 4-20 mA standard current signal by the measuring circuit and the amplifying circuit to be output.
In the formula:
delta rho-density difference between upper layer drilling fluid and lower layer drilling fluid in mud tank, g/cm 3 ；
P 1 、P 2 -upper and lower drilling fluid column pressure, kP, in the mud tank a ；
H 1 、H 2 -the height of the upper and lower drilling fluid columns, m, in the mud tank;
g-constant of gravity, 9.8N/kg.
In the formula:
Δ C — differential pressure transmitter capacitance variation, pF;
epsilon-the dielectric constant of the interpolar medium (silicone oil);
delta-distance between the plates, mm;
K 1 -a scaling factor;
delta P-the amount of pressure change, kP, caused by changes in the pressure of the drilling fluid column a 。
During operation, high density drilling fluid weighting agent takes place to subside in mud jar 1 and can lead to the jar interior lower floor drilling fluid density high, upper drilling fluid density is low, this density difference of capacitanc pressure transmitter 10 automatic monitoring, when the density difference exceedes the setting value, pressure transmitter output signal of telecommunication, first sand pump 71 is automatic to be opened, the clean drilling fluid of pumping passes through jet nozzle 4 blowout, bottom high density drilling fluid forms the turbulent flow of upflow, makes the upper and lower floor drilling fluid misce bene in mud jar 1.
Aiming at the defects of manual tank cleaning after the drilling fluid weighting agent is settled, the invention is provided with an anti-settling mechanism, a separation and recovery mechanism and a drilling fluid settlement monitoring mechanism on the basis of the original mud tank 1, thereby solving the difficult problem of manual tank cleaning. The automatic processing and recycling of the sedimentation weighting agent in the mud tank 1 are realized, the sedimentation of the high-density drilling fluid weighting agent is avoided and the sedimentation stability of the drilling fluid is improved by automatically monitoring the density difference between the upper part and the lower part of the drilling fluid in the mud tank 1. In addition, the problems of small jet impact area and easy blockage of the conventional nozzle are solved by adopting the special structure and the installation layout of the duckbilled jet nozzle 4.
Through the high-density drilling fluid treatment device provided by the invention, workers do not need to leave the tank for operation, and the problems of low automation degree, high labor intensity, large potential safety hazard and the like of sediment removal of the mud tank 1 are fundamentally solved; the working environment of workers is obviously improved, and the drilling cost and the labor cost are saved; the waste of weight material and the maintenance frequency of workers on the performance of the drilling fluid are avoided; the method is simple to operate, is suitable for more well sites, completes the HSE management system of the drilling crew and has wide popularization prospect.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a high density drilling fluid processing apparatus which characterized in that, includes that drilling fluid prepares jar, prevents subsiding mechanism and separation and retrieve the mechanism, wherein:
the anti-settling mechanism is arranged inside the mud tank and communicated with the drilling fluid preparation tank, drilling fluid in the drilling fluid preparation tank can be sprayed into the mud tank through the anti-settling mechanism so that sediments at the bottom of the mud tank are in a suspension state, the separation and recovery mechanism is arranged between the mud tank and the drilling fluid preparation tank, and can separate the drilling fluid flowing into the mud tank from the mud tank and convey the separated liquid phase and part of the separated solid phase to the drilling fluid preparation tank.
2. The high-density drilling fluid treatment device according to claim 1, wherein the anti-settling mechanism comprises a high-pressure pipeline structure and a jet nozzle, the high-pressure pipeline structure is arranged inside the mud tank, a fluid channel allowing fluid to pass through is formed in the high-pressure pipeline, one end of the fluid channel is communicated with the drilling fluid preparation tank through a pumping structure, the jet nozzle is arranged along the circumferential direction of the high-pressure pipeline structure, and drilling fluid in the drilling fluid preparation tank can enter the fluid channel through the pumping structure and can be ejected into the mud tank through the jet nozzle.
3. The high density drilling fluid treatment device of claim 2, wherein the high pressure line structure is laid inside the mud pot in an "S" shape, and the jet nozzles are arranged in a staggered arrangement in the circumferential direction of the high pressure line structure.
4. The high density drilling fluid treatment device of claim 2 or 3, wherein the distance between the bottom of the high pressure line structure and the upper surface of the mud drum bottom is 10-15 cm, and the jet nozzle is duckbill-shaped.
5. The high-density drilling fluid treatment device according to claim 2, wherein the pumping structure comprises a first sand pump, a preparation tank connecting pipe and a high-pressure pipeline connecting pipe, an inlet end of the first sand pump is communicated with the drilling fluid preparation tank through the preparation tank connecting pipe, an outlet end of the first sand pump is communicated with the high-pressure pipeline structure through the high-pressure pipeline connecting pipe, a first mounting through hole for mounting the high-pressure pipeline connecting pipe is formed in a side wall of the mud tank, and the first mounting through hole is located at a lower position of the mud tank.
6. The high-density drilling fluid treatment device according to claim 2, wherein the separation and recovery mechanism comprises a sand remover and a vibrating screen, the sand remover is communicated with the mud tank through a sand pump structure, the vibrating screen is communicated with the sand remover, drilling fluid in the mud tank can be pumped into the sand remover through the sand pump structure, a liquid phase obtained after solid-liquid separation by the sand remover is conveyed to the drilling fluid preparation tank, a solid phase obtained after solid-liquid separation by the sand remover is conveyed to the vibrating screen, and a weighting agent separated by the vibrating screen can be conveyed to the drilling fluid preparation tank.
7. The high-density drilling fluid treatment device according to claim 6, wherein the sand pump structure comprises a second sand pump, a mud tank connecting pipe and a desander connecting pipe, an inlet end of the second sand pump is communicated with the mud tank through the mud tank connecting pipe, an outlet end of the second sand pump is communicated with the desander through the desander connecting pipe, a second mounting through hole for mounting the mud tank connecting pipe is formed in a side wall of the mud tank, and the second mounting through hole is located at an upper position of the mud tank.
8. The high density drilling fluid treatment device of claim 1, wherein a stirring structure is provided in the drilling fluid distribution tank, wherein:
the stirring structure comprises a power device, a stirring shaft and stirring blades, wherein the output end of the power device is connected with the stirring shaft, at least part of the section of the stirring shaft is arranged in the drilling fluid preparation tank, and the stirring blades are arranged at the lower end of the stirring shaft and are provided with gaps between the bottoms of the drilling fluid preparation tank.
9. The high-density drilling fluid treatment device according to claim 2, further comprising a drilling fluid sedimentation monitoring mechanism and a PLC, wherein the drilling fluid sedimentation monitoring mechanism is installed in the mud tank and used for detecting the density difference between the upper-layer drilling fluid and the lower-layer drilling fluid in the mud tank, the drilling fluid sedimentation monitoring mechanism is connected with the PLC, the PLC is connected with the pumping structure, when the density difference between the upper-layer drilling fluid and the lower-layer drilling fluid in the mud tank exceeds a preset value, the drilling fluid sedimentation monitoring mechanism can output an electric signal to the PLC, and the PLC controls the pumping structure to be started.
10. The high density drilling fluid treatment device of claim 9, wherein the drilling fluid settlement monitoring mechanism employs a capacitive pressure transducer.
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| CN202210931408.5A CN115126430A (en) | 2022-08-04 | 2022-08-04 | High-density drilling fluid treatment device |
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| CN202210931408.5A CN115126430A (en) | 2022-08-04 | 2022-08-04 | High-density drilling fluid treatment device |
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