CN104131795A - Well drilling fluid treatment device and method - Google Patents
Well drilling fluid treatment device and method Download PDFInfo
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- CN104131795A CN104131795A CN201410339891.3A CN201410339891A CN104131795A CN 104131795 A CN104131795 A CN 104131795A CN 201410339891 A CN201410339891 A CN 201410339891A CN 104131795 A CN104131795 A CN 104131795A
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Abstract
The invention relates to a well drilling fluid treatment device and method. The well drilling fluid treatment device comprises a vibrating screen, a grit separator and a conveyer, wherein the vibrating screen is used for conducting solid-liquid separation on used well drilling fluid, discharging separated solid-phase substances to the conveyer and discharging separated mud to the grit separator, the grit separator is used for conducting solid-liquid separation on the mud, discharging separated solid-phase substances to the conveyer and discharging separated liquid-phase substances to a well drilling fluid preparation tank so that new well drilling liquid can be prepared, and the conveyer is used for conveying solid-phase substances discharged by the vibrating screen and solid-phase substances discharged by the grit separator to a storage pond to be recovered. According to the well drilling fluid treatment device and method, hydration of drilling cuttings can be restrained from the source, the structure is simple, operation is convenient, and cost is low.
Description
Technical field
The present invention relates to oilfield drilling field of engineering technology, be specifically related to a kind of drilling fluid treating apparatus and method.
Background technology
Along with the sustainable growth of world's Demand of Oil & Gas and the development of drilling technology, the offal treatment of oilfield drilling liquid also more and more comes into one's own with recovery.The drilling fluid waste liquid of the discarded hundreds of in the capital of every a bite well after having bored cube, the main component of these waste liquids comprises heavy metal, inorganic salts, sewage sump oil, chemicals, drilling cuttings etc., contain many environmentally hazardous compositions, and having how many mouthfuls of drilling wells just to have how many waste liquid mud pits, the severe contamination problem that this causes environment is urgently to be resolved hurrily.
Prior art one has adopted in mud pit bottom and has laid antiseepage film, remove the method for the harmful oil product of part and water product by natural evaporation, obvious this method is owing to being subject to weather effect larger, and the material such as drilling cuttings still can pollute underground environment, and the environment protecting that can reach is very limited; Prior art two has adopted to the solidify & bury method that adds curing compound in waste liquid, first the problem that this method exists is that curing cost is higher, next be curing material after landfill easily to underground environment, then also caused the serious waste of resource.And above-mentioned prior art does not all realize, and drilling fluid does not land, not pulping and non-running pulp.
Summary of the invention
Technical problem
In view of this, the technical problem to be solved in the present invention is that drilling fluid is processed, and to avoid the pollution of used drilling fluid to environment, realizes the Efficient Cycle utilization to drilling fluid.
Solution
In order to solve the problems of the technologies described above, according to one embodiment of the invention, provide a kind of drilling fluid treating apparatus, comprising:
Vibrosieve, for used drilling fluid is carried out to Separation of Solid and Liquid, and is discharged to conveyer by isolated institute solid phase, by isolated institute slurry transportation to desander;
Described desander, for described mud is carried out to Separation of Solid and Liquid, and is discharged to described conveyer by isolated institute solid phase, isolated institute liquid phase is delivered to drilling fluid preparing tank, to prepare new drilling fluid; And
Described conveyer, is connected with described vibrosieve and described desander, reclaims for the solid phase of the solid phase of described vibrosieve discharge and the discharge of described desander is delivered to reservoir.
For above-mentioned drilling fluid treating apparatus, in a kind of possible implementation, described vibrosieve has two wire screen, and the sieve mesh of described wire screen is 20～40 orders.
For above-mentioned drilling fluid treating apparatus, in a kind of possible implementation, described desander has two, and the sieve mesh of described desander is 200,240,250 or 300 orders.
For above-mentioned drilling fluid treating apparatus, in a kind of possible implementation, the outlet of described desander is provided with butterfly valve or ball valve.
For above-mentioned drilling fluid treating apparatus, in a kind of possible implementation, also comprise: cleaning equipment, be connected between the outlet of described desander and the entrance of described drilling fluid preparing tank, for the isolated liquid phase of described desander being carried out to one or more processing of dosing, de-steady, flocculation, oxidation and adsorption filtration.
For above-mentioned drilling fluid treating apparatus, in a kind of possible implementation,
Described conveyer is Shaftless screw conveyor, and the blade diameter of described Shaftless screw conveyor is 350mm, and pitch is 280mm, and described conveyer is obliquely installed, and inclination angle is 4.6 degree.
For above-mentioned drilling fluid treating apparatus, in a kind of possible implementation, also comprise:
Liquid reserve tank, is positioned at the below of lower one end of described conveyer, the liquid flowing out for storing described conveyer; And
Reservoir, is positioned at the below of higher one end of described conveyer, the solid matter transferring out for storing described conveyer.
In order to solve the problems of the technologies described above, the embodiment of the present invention also provides a kind of drilling fluid processing method, comprising:
Step S10, vibrosieve carry out Separation of Solid and Liquid to used drilling fluid, and isolated institute solid phase is discharged to conveyer, by isolated institute slurry transportation to desander;
Step S20, described desander carry out Separation of Solid and Liquid to described mud, and isolated institute solid phase is discharged to described conveyer, and isolated institute liquid phase is delivered to drilling fluid preparing tank, to prepare new drilling fluid; And
The solid phase that the solid phase that step S30, described conveyer are discharged described vibrosieve and described desander are discharged is delivered to reservoir and reclaims.
For above-mentioned drilling fluid processing method, in a kind of possible implementation, described vibrosieve shines order with 20～40 objects described used drilling fluid is carried out to Separation of Solid and Liquid, and described desander carries out Separation of Solid and Liquid with 200,240,250 or 300 object sieve meshes to described mud.
For above-mentioned drilling fluid processing method, in a kind of possible implementation, described by isolated liquid phase be delivered to drilling fluid preparing tank and also comprise to prepare before new drilling fluid:
The isolated liquid phase of described desander is carried out to one or more in dosing, de-steady, flocculation, oxidation and adsorption filtration.
Beneficial effect
Drilling fluid treating apparatus and method that the embodiment of the present invention provides, by adopting vibrosieve to carry out preliminary Separation of Solid and Liquid, by desander, the isolated mud of vibrosieve is carried out to Separation of Solid and Liquid again used drilling fluid, and the solid phase and the liquid phase that after separating, obtain are recycled, can suppress from source drilling cuttings aquation, thereby significantly reduce the generation of pollutant, process again without polluting; Main desander and the vibrosieve of relying on carries out solid controlling to used drilling fluid, and whole solid controlling architecture is simple, convenient operation; Significantly reduce costs, well site is not had to particular/special requirement yet, do not need additionally to increase well site area; Pollute with boring and process, after finishing drilling, can drop into lower a bite well at once, do not increase extra time and manpower and materials.
According to below with reference to accompanying drawing to detailed description of illustrative embodiments, it is clear that further feature of the present invention and aspect will become.
Brief description of the drawings
The accompanying drawing being included in manual and form a part for manual shows exemplary embodiment of the present invention, feature and aspect together with manual, and for explaining principle of the present invention.
Fig. 1 illustrates the structural representation of the drilling fluid treating apparatus that one embodiment of the invention provides;
Fig. 2 illustrates the flow chart of the drilling fluid processing method that another embodiment of the present invention provides.
Detailed description of the invention
Describe various exemplary embodiments of the present invention, feature and aspect in detail below with reference to accompanying drawing.The identical same or analogous element of Reference numeral presentation function in accompanying drawing.Although the various aspects of embodiment shown in the drawings, unless otherwise indicated, needn't draw accompanying drawing in proportion.
Here special word " exemplary " means " as example, embodiment or illustrative ".Here needn't be interpreted as being better than or being better than other embodiment as " exemplary " illustrated any embodiment.
In addition, for better explanation the present invention, in detailed description of the invention below, provided numerous details.It will be appreciated by those skilled in the art that and there is no some detail, the present invention can implement equally.In some instances, method, means, element and the circuit known are not for those skilled in the art described in detail, so that highlight purport of the present invention.
embodiment 1
Fig. 1 illustrates the structural representation of drilling fluid treating apparatus according to an embodiment of the invention.As shown in Figure 1, this drilling fluid treating apparatus mainly comprises: vibrosieve 1, desander 2 and conveyer 3.
Wherein, vibrosieve 1 is for carrying out Separation of Solid and Liquid to used drilling fluid, screen out bulky grain drilling cuttings and coated after mud stone agglomerate.
The vibrosieve 1 of the present embodiment can have two wire screen 11, and the sieve mesh of wire screen 11 is 20～40 orders, is preferably 30～40 orders, and blocking construction and rear circulation outermost a slice sieve are pricked 6mm hole.Because screen cloth is thicker, fine sand and thin mud stone particle easily pass through, and therefore can effectively prevent running pulp, have ensured that drilling fluid does not land from source.Ensure that an open cycle drilling fluid just enters vibrosieve 1, can avoid like this systemic circulation hole to cause earth's surface to pollute.
Enter conveyer 3 through the isolated solid phase of vibrosieve 1, be transported to desander 2 through the isolated liquid phase mud of vibrosieve 1, in the present embodiment, can enter desander 2 by pipeline or other aspirators.
Desander 2 is connected with vibrosieve 1, carries out Separation of Solid and Liquid for the liquid phase mud that vibrosieve 1 is exported, remove in mud compared with granule.In the present embodiment, for increasing the amount of drilling fluid of each processing, two desanders 2 can be set.The sieve mesh of the wire screen 21 of desander 2 is 200,240,250 or 300 orders, is conducive to remove the solid phase that particle diameter is greater than heavy weight additive, and through after the filtration of desander 2, the less particle such as drilling cuttings, mud stone is removed.
Preferably, backflow slurry general export at desander 2 installs butterfly valve or ball valve 22 additional, in pulp, regulate the cyclone outlet valve in the pump of desander 2, to ensure not running pulp, can force thus to discharge harmful solid phases such as drilling cuttings, salt, heavy metal class, pitch, prevent the solid controlling failure that desander 2 underflow dry plugs cause, also help the useful materials such as recycled plastic microballon, coating agent.
Solid phase after desander 2 filterings enters conveyer 3, the liquid phase leaching through desander 2 is discharged to drilling fluid preparing tank by the pipeline connecting on desander 2, then in tank, add the composition such as curing compound, heavy weight additive can be mixed with new drilling fluid, enter next drilling well circulation and continue to use, realized thus drilling fluid and do not landed and recycle.
Because the particle diameter of the coated mud stone agglomerate of great majority, bulky grain drilling cuttings is greater than 30 orders conventionally, diameter is greater than 0.5mm, and therefore mud stone agglomerate and bulky grain drilling cuttings just can remove substantially through vibrosieve 1; And a small amount of remaining mud stone granule, drilling cuttings granule etc. can substantially thoroughly remove at desander 2; So, by vibrosieve 1 being set and desander 27 carries out secondary Separation of Solid and Liquid to drilling fluid successively, can comparatively fast remove more up hill and dale solid phase, therefore drilling fluid can pulping, without plasma discharge link yet.
Conveyer 3 is connected with desander 2 with vibrosieve 1, the first end 31 of conveyer 3 is liquid outlet, the second end 32 is solid phase outlet opening, first end 31 is a little less than the second end 32, so that liquid Natural excrement under Action of Gravity Field, this liquid is the water of flushing vibration sieve 1, desander 2, adopts scour without sediment motion vibrosieve 1 and desander 2 in the present embodiment, and do not add any medicament, to ensure not modification of drilling fluid.First end 31 exits are mounted with liquid reserve tank 4, for receiving the liquid of discharging from conveyer 3; The second end 32 exits are mounted with reservoir 5, for solid phases such as accommodating drilling cuttings of discharging from conveyer 3.
Preferably, conveyer 3 can be positioned at vibrosieve 1 and desander 3 under.
Preferably, conveyer 3 can be shaftless screw conveyer, and the solid matter of vibrosieve 1 and desander 2 being discharged by rotary thrust is pushed to the second end 32, and enters reservoir 5.
Preferably, the blade of conveyer 3 is 350mm, and pitch is 280, and inclination angle is 4.6 degree.
Reservoir 5 in the present embodiment plays the effect of the materials such as interim store cuttings, its capacity is 15 cubic metres, preferably, also be provided with more jumbo holding vessel, if forklift can not be transported the materials such as the drilling cuttings in reservoir 5 in time, the material in reservoir 5 is first left in holding vessel, the capacity of this holding vessel is preferably 40 cubic metres.
Forklift is transported the material in reservoir 5, and can be used as concrete material and be used for paving the way, or the purposes such as lay a foundation, thereby take full advantage of the solid phase resource in drilling fluid waste liquid.
For the liquid in isolated liquid phase in desander 2 and liquid reserve tank 4, can carry out the processing such as dosing, de-steady, flocculation, oxidation and adsorption filtration, to get rid of the major pollutants in liquid, make the liquid after processing meet environmental requirement, can safety dumping; After further carrying out the processing such as ultrafiltration and reverse osmosis deaslination, can reach irrigation water quality standard, for irrigated farmland; And in the present embodiment preferably, after processing by decontamination, be recycled in drilling fluid preparing tank, by adding curing compound, heavy weight additive etc. to be mixed with new drilling fluid, can realize the recycling of efficient, environmental protection of drilling fluid.
In the time utilizing the new drilling fluid of liquid dosage reclaiming, the present embodiment has added the materials such as low pH value acid solution, appropriate KCL solution, gel pack quilt and NaHCO3, NH4-PAN, NaHSO4 therein.Wherein, the pH value of acid solution remains between 6.0～7.5, to ensure that drilling fluid departs from hydration of mud stone environment.The content of KCL solution is between 2～3%, effectively to suppress hydration of mud stone.The content of gel pack quilt is between 1～2%, to stop mud stone division, water suction and pulping.The NaHCO3, the NH4-PAN that add are conducive to remove the Ca2+ in drilling fluid, reduce drilling fluid contamination; And can suppress to assemble, stable glue, cut, dehydration.Add NaHSO4 and can reduce pH value, in and the alkalescence that causes of cement, control pH value and remain between 6.0～7.5, inhibition aquation, stabilizing borehole, prevents pulping.
Preferably, the conveyer 3 of the present embodiment supports by channel-section steel, in conveyer 3, is lined with nylon lining plate, and the drive unit of conveyer also has cycloidal planetary gear speed reducer as reducing gear, and channel-section steel can be positioned at conveyer 3 belows also can be positioned at channel-section steel below.
In the possible implementation of another kind, the drilling fluid treating apparatus of the present embodiment is also provided with centrifuge (not shown), for drilling fluid is directly carried out to Separation of Solid and Liquid.In this case, an other conveyer 6 need to be set, to isolated centrifuge solid matter is transported to reservoir 5.Centrifuge can be worked together with vibrosieve 1, desander 2, also can work independently.In the time that centrifuge is worked together with vibrosieve 1, desander 2, vibrosieve 1, desander 2 concentrate in reservoir 5 with the solid matter that centrifuge is discharged, so that forklift transports.Preferably, two desk centrifuges are set, prevent drilling fluid thickening, and ensure that the mud extraction state of centrifuge is wriggling paste, and do not have paste liquid to flow out, can prevent thus forklift spillage contaminated environment.
embodiment 2
As shown in Figure 2, the flow chart of the drilling fluid processing method providing for the embodiment of the present invention, the method comprises the following steps:
Step S10, vibrosieve 1 carry out Separation of Solid and Liquid to used drilling fluid in drilling well, screen out bulky grain drilling cuttings and coated after mud stone agglomerate, isolated solid phase enters conveyer 3, isolated mud enters desander 2.
In drilling process, density enters vibrosieve 1 higher than the drilling fluid of reservoir pressure coefficient and formation collapsed pressure coefficient, and vibrosieve 1 tentatively filters drilling fluid.Because the sieve mesh of vibrosieve 1 is 20～40 orders, the particle diameter that therefore can screen out in drilling fluid is greater than 30 object mud stone agglomerates, bulky grain drilling cuttings, can realize thus the preliminary filtration to drilling fluid.Because wire screen is thicker, therefore the isolated liquid phase of institute, for being mixed with more short grained mud, can pump slurry into desander 2 by mulling pump, and isolated institute solid phase is sent into conveyer 3.
Step S20, desander 2 carry out Separation of Solid and Liquid to the mud from vibrosieve 1, screen out the drilling cuttings mud stone granule in mud, and isolated solid phase enters conveyer 3, and isolated liquid enters drilling fluid preparing tank.
In this step, the mud that desander leaches vibrosieve 1 further separates, and the sieve mesh of desander 2 vibrosieves is 200,240,250 or 300 orders, effectively the fine particle such as drilling cuttings, mud stone in filtering mud.Liquid phase substance in mud is transported to drilling fluid preparing tank, uses by adding the material such as curing compound, heavy weight additive can be mixed with new drilling fluid and be delivered in drilling well.
The solid phase that the solid phase that step S30, conveyer 3 are discharged vibrosieve 1 and desander 2 are discharged is delivered to reservoir 5, and the water that rinses vibrosieve 1 and desander 2 is delivered to liquid reserve tank 4.
Because adopting the clear water that does not add medicament, the present embodiment rinses vibrosieve 1 and desander 2, therefore can ensure the not modification of water after rinsing, therefore the water entering in liquid reserve tank 4 by conveyer 3 in this step also can be delivered to the recycling of drilling fluid preparing tank, is used for preparing new drilling fluid.The solid matter such as drilling cuttings, mud stone in reservoir 5 is transported away for paving the way and lays a foundation etc. by forklift.
This step can be synchronizeed and carry out with step S20.
If above-mentioned drilling fluid treating apparatus also comprises centrifuge, in step 10, centrifuge carries out Separation of Solid and Liquid to drilling fluid, and the solid phase separating enters conveyer 3, and the liquid phase substance separating enters drilling fluid preparing tank, for preparing new drilling fluid.
Drilling fluid treating apparatus and method that the embodiment of the present invention provides, by adopting vibrosieve to carry out preliminary Separation of Solid and Liquid, by desander, the isolated mud of vibrosieve is carried out to Separation of Solid and Liquid again used drilling fluid, and the solid phase and the liquid phase that after separating, obtain are recycled, can suppress from source drilling cuttings aquation, thereby significantly reduce the generation of pollutant, process again without polluting; Main desander and the vibrosieve of relying on carries out solid controlling to used drilling fluid, and whole solid controlling architecture is simple, convenient operation; Significantly reduce costs, well site is not had to particular/special requirement yet, do not need additionally to increase well site area; Pollute with boring and process, after finishing drilling, can drop into lower a bite well at once, do not increase extra time and manpower and materials.
Those of ordinary skill in the art can recognize, each exemplary cell and algorithm steps in embodiment described herein can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions realize with hardware or software form actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can realize described function for specific application choice diverse ways, but this realization should not thought and exceeds scope of the present invention.
If realize described function and as production marketing independently or while using using the form of computer software, can think to a certain extent that all or part of (part for example prior art being contributed) of technical scheme of the present invention is with the form embodiment of computer software product.This computer software product is stored in the non-volatile memory medium of embodied on computer readable conventionally, comprises that some instructions are in order to make computer equipment (can be personal computer, server or the network equipment etc.) carry out all or part of step of various embodiments of the present invention method.And aforesaid storage medium comprises USB flash disk, portable hard drive, read-only storage (ROM, Read-Only Memory), the various media that can be program code stored such as random access memory (RAM, Random Access Memory), magnetic disc or CD.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, any be familiar with those skilled in the art the present invention disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a drilling fluid treating apparatus, is characterized in that, comprising:
Vibrosieve, for used drilling fluid is carried out to Separation of Solid and Liquid, and is discharged to conveyer by isolated institute solid phase, by isolated institute slurry transportation to desander;
Described desander, for described mud is carried out to Separation of Solid and Liquid, and is discharged to described conveyer by isolated institute solid phase, isolated institute liquid phase is delivered to drilling fluid preparing tank, to prepare new drilling fluid; And
Described conveyer, is connected with described vibrosieve and described desander, reclaims for the solid phase of the solid phase of described vibrosieve discharge and the discharge of described desander is delivered to reservoir.
2. drilling fluid treating apparatus according to claim 1, is characterized in that, described vibrosieve has two wire screen, and the sieve mesh of described wire screen is 20～40 orders.
3. drilling fluid treating apparatus according to claim 1, is characterized in that, described desander has two, and the sieve mesh of described desander is 200,240,250 or 300 orders.
4. drilling fluid treating apparatus according to claim 1, is characterized in that, the outlet of described desander is provided with butterfly valve or ball valve.
5. drilling fluid treating apparatus according to claim 1, it is characterized in that, also comprise: cleaning equipment, be connected between the outlet of described desander and the entrance of described drilling fluid preparing tank, for the isolated liquid phase of described desander being carried out to one or more processing of dosing, de-steady, flocculation, oxidation and adsorption filtration.
6. drilling fluid treating apparatus according to claim 1, is characterized in that, described conveyer is Shaftless screw conveyor, and the blade diameter of described Shaftless screw conveyor is 350mm, and pitch is 280mm, and described conveyer is obliquely installed, and inclination angle is 4.6 degree.
7. drilling fluid treating apparatus according to claim 1, is characterized in that, also comprises:
Liquid reserve tank, is positioned at the below of lower one end of described conveyer, the liquid flowing out for storing described conveyer; And
Reservoir, is positioned at the below of higher one end of described conveyer, the solid matter transferring out for storing described conveyer.
8. a drilling fluid processing method, is characterized in that, comprising:
Step S10, vibrosieve carry out Separation of Solid and Liquid to used drilling fluid, and isolated institute solid phase is discharged to conveyer, by isolated institute slurry transportation to desander;
Step S20, described desander carry out Separation of Solid and Liquid to described mud, and isolated institute solid phase is discharged to described conveyer, and isolated institute liquid phase is delivered to drilling fluid preparing tank, to prepare new drilling fluid; And
The solid phase that the solid phase that step S30, described conveyer are discharged described vibrosieve and described desander are discharged is delivered to reservoir and reclaims.
9. drilling fluid processing method according to claim 8, it is characterized in that, described vibrosieve shines order with 20～40 objects described used drilling fluid is carried out to Separation of Solid and Liquid, and described desander carries out Separation of Solid and Liquid with 200,240,250 or 300 object sieve meshes to described mud.
10. drilling fluid processing method according to claim 8, is characterized in that, described by isolated liquid phase be delivered to drilling fluid preparing tank and also comprise to prepare before new drilling fluid:
The isolated liquid phase of described desander is carried out to one or more in dosing, de-steady, flocculation, oxidation and adsorption filtration.
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| CN201410339891.3A CN104131795A (en) | 2014-07-16 | 2014-07-16 | Well drilling fluid treatment device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410339891.3A CN104131795A (en) | 2014-07-16 | 2014-07-16 | Well drilling fluid treatment device and method |
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| CN104131795A true CN104131795A (en) | 2014-11-05 |
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| CN201410339891.3A Pending CN104131795A (en) | 2014-07-16 | 2014-07-16 | Well drilling fluid treatment device and method |
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| CN112974463A (en) * | 2019-12-13 | 2021-06-18 | 中国石油天然气股份有限公司 | Method and device for treating solid-phase waste in waste water-based drilling fluid |
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