CN105130047A - Well killing fluid processing method and equipment - Google Patents
Well killing fluid processing method and equipment Download PDFInfo
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- CN105130047A CN105130047A CN201510507258.5A CN201510507258A CN105130047A CN 105130047 A CN105130047 A CN 105130047A CN 201510507258 A CN201510507258 A CN 201510507258A CN 105130047 A CN105130047 A CN 105130047A
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Abstract
The invention relates to a well killing fluid processing method and equipment. The well killing fluid processing method comprises steps of pretreatment coagulation, solid-liquid separation, secondary coagulation, and oxidation filtration. The equipment comprises a mud sieving all-in-one machine, a high-pressure membrane pressure filter, an air-flotation precipitation all-in-one machine, and a filtering device. According to the well killing fluid processing method, a drug added in the step of pretreatment coagulation is sodium hydroxide; a drug added in the step of secondary coagulation is aluminium polychlorid; suspended matter content of discharged water obtained via the well killing fluid processing method is 400mg/l or lower, chemical oxygen demand is 120mg/l or lower, pH ranges from 6 to 9; the equipment is compact is structure, small in occupied area, and low in investment; installation is convenient; and it is beneficial for centralized management.
Description
Technical field
The invention belongs to technical field of sewage, be specifically related to a kind of well control fluid treatment process and equipment.
Background technology
When carrying out well workover, kill operation to oil well, gas well, in order to prevent blowout, needing to pump into well control fluid in well, after the end of job, if the kill-job waste liquid of generation does not process, then can cause the waste of water.
According to development and the engineering practice of domestic and international sewage disposal technology, be that the water technology of handling object mainly contains three kinds with industrial sewage:
First biochemical processing, utilizes microorganism to decompose the organism in sewage exactly; Conventional process mainly contains: activated sludge process, such as, and completely mixed process, extended aeration process, deep well aeration method, pure-oxygen aeration method, oxidation ditch, two-stage activated sludge process and sequencing batch active sludge (SBR method), ICEAS method etc.Biomembrance process, such as, biological contact oxidation process, blodisc, biological filter etc.But it is large to there is floor space in above treatment technology, constructional difficulties, the problems such as running cost is high, complex management.
It two is materializing strategy technology, and this technology comprises the methods such as coagulating sedimentation, air supporting, absorption, filtration, and usually combines with biological process, makes water quality reach expection requirement.The major advantage of materializing strategy is that floor space is little, convenient operating maintenance.
It three is membrane separation technology, and this technology is commonly used as MBR membrane bioreactor and ultrafiltration process.This Process for Effluent water quality is better, and early investment is higher, but work-ing life is longer.
Ultrafiltration is a kind of screening process relevant to membrane pore size size, with the pressure difference of film both sides for motivating force, take ultra-filtration membrane as filtration medium, under pressure, when stoste flows through film surface, the many tiny micropore that ultrafiltration membrane surface gathers only allows water and small-molecule substance pass through and become permeate, and the material that in stoste, volume is greater than film surface micropore footpath is then trapped within the liquid feeding side of film, become concentrated solution, thus realize the object of the purification to stoste, isolation and identification.
Summary of the invention
In order to process kill-job waste liquid, first object of the present invention is to provide a kind of well control fluid treatment process, and in well control fluid, primary solids composition is xanthan gum and oil-soluble temporary plugging agent, water-quality guideline is, suspended substance >=20000mg/l, chemical oxygen demand (COD) >=2000mg/l, pH6-9.
The technical scheme adopted comprises the steps:
S1, pre-treatment coagulation: first remove the macrobead high rigidity solid phase in waste liquid of drilling, then to adding brokenly glue coagulated agent sodium hydroxide in it, more than its pH value to 12 is regulated, stirring at low speed, waste liquid after broken glue flocculation produces larger flocculation group, and separates out free-water;
S2, solid-liquid separation: the waste liquid obtained through S1 step process being carried out solid-liquid separation by forcing filter press technique, making cake moisture drop to less than 60%;
S3, second coagulation: in the filtrate obtained after S2 step process, add flocculant poly aluminum chloride, carry out flocculating settling;
S4, filtration oxide treatment: according to waste liquid situation and Effluent criteria, carry out quartz sand filtration successively, and/or activated carbon filtration, and/or micro-pore-film filtration, and/or ultrafiltration, and/or nanofiltration, and/or reverse osmosis cascade filtration, reach Effluent criteria; Then in water, adding pH adjusting agent adjust ph is 6-9, then adds oxygenant, and sterilant carries out sterilization and reduces COD.
As preferred embodiments of the present invention, in S1, the addition of broken glue coagulated agent sodium hydroxide is 15000-20000mg/l.
As preferred embodiments of the present invention, in S1, stirring velocity is 1r/s, and churning time is 1-3min.
As preferred embodiments of the present invention, the amount of the flocculant poly aluminum chloride added in S3 is 10-40mg/L.
Second object of the present invention is to provide a kind of equipment of well control fluid process, comprise the sieve mud all-in-one be linked in sequence successively, broken glue coagulation device, autoclave diaphragm pressure filter, air supporting precipitation all-in-one, filtration unit and oxidation pond, also comprise sand pump, to the spiral pump of autoclave diaphragm pressure filter feed flow, the first medicine machine, second medicine machine, provides the 3rd medicine machine of medicament to described oxidation pond;
Described sieve mud all-in-one is the all-in-one of vibratory screening apparatus and silt remover composition, is that described silt remover is for slurry by described sand pump;
Described broken glue coagulation device comprises coagulation basin and in described coagulation basin, provides the first medicine machine of medicament, is provided with at least a set of stir shaft in described coagulation basin, often overlaps on stir shaft and is provided with at least a set of agitating axle leaf sheet;
Described air supporting precipitation all-in-one comprises inclined-plate clarifying basin, airfloat equipment and the second medicine machine; Described filtration unit comprises quartz filter, and/or activated charcoal filter, and/or microporous membrane filters, and/or closed accurate filter; Be provided with at least a set of stir shaft in described oxidation pond, often overlap on described stir shaft and be provided with at least a set of agitating axle leaf sheet.
3rd object of the present invention is to provide a kind of method using aforesaid device to carry out well control fluid process, comprises the steps:
SS1, pre-treatment coagulation: waste liquid enters sieve mud all-in-one through sand pump, the macrobead high rigidity solid phase of drilling cuttings is comprised with removing, then waste liquid enters brokenly glue coagulation device, in the coagulation basin of broken glue coagulation device, glue coagulated agent sodium hydroxide is added brokenly by the first medicine machine, regulate more than its pH value to 12, stirring at low speed, the waste liquid after broken glue flocculation produces larger flocculation group, and separates out free-water;
SS2, solid-liquid separation: the floc sedimentation obtained through SS1 step process and free liquid mixture are transported to autoclave diaphragm filter by spiral pump, after filtering, filter cake moisture content drops to less than 60%;
SS3, second coagulation: send into air supporting precipitation all-in-one to the filtrate obtained after SS2 step process, add flocculation agent by the second medicine machine, the air supporting that airfloat equipment produces can reduce BOD and the COD content in water under the help of flocculation agent;
SS4, filtration oxide treatment: according to waste liquid situation and Effluent criteria, successively through quartz filter, and/or activated charcoal filter, and/or microporous membrane filters, and/or closed accurate filter filters, and reaches Effluent criteria; Then filtered water is introduced oxidation pond, and in water, to add pH adjusting agent adjust ph by the 3rd medicine machine be 6-9, then add oxygenant by the 3rd medicine machine, sterilant carries out sterilization and reduces COD.
As preferred embodiments of the present invention, in SS1, the addition of broken glue coagulated agent sodium hydroxide is 15000-20000mg/l.
As preferred embodiments of the present invention, in S1, stirring velocity is 1r/s, and churning time is 1-3min.
As preferred embodiments of the present invention, the amount of the flocculant poly aluminum chloride added in SS3 is 10-40mg/L.
In pre-treatment coagulation step; because containing the high molecular polymer such as xanthan gum, oil-soluble temporary plugging agent in waste liquid; and xanthan gum major part is present in waste liquid with ionic condition; that there is full-bodied stable colloid; make colloidal solid sedimentation just must destroy the stability of colloid; impel colloidal solid to contact with each other, become larger particle, key is the carried charge reducing colloid.This by compression thickness of diffusion layer, can reduce current potential and reaches.And the polymeric flocculants such as the PAC (polymerize aluminum chloride) that tradition is commonly used and PAM (polyacrylamide) all cannot by de-for waste liquid steady broken glue, the present inventor finds in test, adopt sodium hydroxide best results, in order to avoid destroying flocculation group, stirring velocity is less than 1r/s, churning time 1-3min.
Instantly prior art adopts polymerize aluminum chloride mostly, Tai-Ace S 150, poly-ferric chloride, the inorganic coagulants such as iron trichloride, and these coagulating agent effect in well control fluid coagulating treatment is bad, there is following several problem:
1, broken glue coagulation needs 2 kinds or two or more medicament, and adds the general expenses such as facility investment expense, equipment operation expense and occupation area of equipment and labour intensity, wastes manpower and materials and time, and equipment is more consumed energy poor efficiency;
2, broken glue coagulation is not thorough, after broken glue coagulation, solid-liquid two-phase all has viscosity, and pH has when pulling back to neutrality or weak acid new a large amount of suspended substances to produce, cause the costs and poor dehydration results of post-processed, and the water quality suspended substance after dehydration, the many indexs such as COD are higher, increase cost and the difficulty of post-processed;
3, to the poor removal effect of metal ion.
The present invention selects the advantage of single sodium hydroxide to be: medicament only needs one, reduces the general expenses such as facility investment expense, equipment operation expense and occupation area of equipment and labour intensity, saves manpower and materials and time, make equipment more efficient energy-saving; Broken glue is thorough, and after broken glue coagulation, solid-liquid two-phase all without any viscosity, and does not have new suspended substance generation when pH pulls back to neutrality or weak acid; Under basic conditions, effectively can remove a large amount of heavy metal ion and other metal ions.
This step adopts sieve mud all-in-one, can filter out the macrobead solid phases such as drilling cuttings, shield to the equipment in later stage.Adopt the technique of coagulation in coagulation basin, advantage is that coagulating is thorough, and process control system, comprise drug concentration, the coagulation time etc.Adopt at least a set of stir shaft, at least one deck agitating vane, stirring at low speed, the technical guarantee coagulatings such as coagulation basin corner camber line design are abundant.
In solid-liquid separation step, in order to realize flocculate group and being separated of free-water, need to adopt mechanical means to dewater, conventional mechanical dehydration method has supercentrifugal process and forces filter press technique, owing to containing drilling cuttings hardly in waste liquid of the present invention, wilkinite and barite geometric ratio great in the suspension solid formation of water, prove through test, the solid formation that supercentrifugal process obtains moisture more than 80%, be not suitable for waste liquid of the present invention, therefore adopt and force filter press technique, the cake moisture obtained is less than 60%, as preferred embodiments of the present invention, drying and other treatment is carried out to the filter cake obtained, such as be exposed to the sun, moisture is dropped to 20-30%, as fuel or fertilizer, with the most energy-conservation, environmental protection, the mode of low-carbon (LC) realizes the high-efficiency resource recycling of mud.
In second coagulation step, because the restriction of pressure filter filter sizes size, still the residue of trace is had to remain in a liquid with ionic condition and suspended substance state, and under alkaline environment, more easily remove the metal ion such as these suspended substances and calcium magnesium, so the pH value of temporary transient not regulates liquid, again add suitable coagulating agent with this understanding and flocculating settling is carried out to above-mentioned substance.
This step adopts air supporting sedimentation all-in-one, and advantage combines air flotation technology and inclined plate sedimentation technology, and facility investment is little, efficient energy-saving.Large proportion suspended substance and little proportion suspended substance can be removed simultaneously, and by injecting air, effectively reduce COD.
Medicament selective polymerization aluminum chloride, advantage is dissolved soon, and solubleness is large, saves medicine machine investment, and do not increase new organism.Existing technique does not mostly adopt this equipment; or have and adopt air flotation technology and swash plate technology; but the situation that two equipment separately designs; and adopt PAM (polyacrylamide) as second coagulation agent; working concentration is slightly improper, namely causes colloid provide protection so that the failure of second coagulation technique.
Filter in oxidation step, according to raw sewage sludge and Effluent criteria, adopt the cascade filtration technique such as quartz sand filtration, activated carbon filtration, micro-filtration, ultrafiltration, nanofiltration, reverse osmosis successively, reach Effluent criteria.
Through above-mentioned process, suspended substance≤400mg/l in effluent quality, chemical oxygen demand (COD)≤120mg/l, pH6-9.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention;
Fig. 2 is the structural representation of pre-treatment coagulation system;
Fig. 3 is the structural representation of air supporting sedimenting system;
Fig. 4 is the structural representation filtering oxidation system.
In figure: 1, sieve mud all-in-one; 2, sand pump; 3, agitator; 4, under meter; 5, spiral pump; 6, PLC control cabinet; 7, air supporting precipitation all-in-one; 8, acid proof pump; 9, grug feeding jar; 10, screen cloth; 11, aerator; 12, quartz filter; 12, activated charcoal filter; 13, microporous membrane filters; 14, closed accurate filter; 15, oxidation pond.
Embodiment
A kind of equipment of well control fluid process, comprise the sieve mud all-in-one be linked in sequence successively, broken glue coagulation device, autoclave diaphragm pressure filter, air supporting precipitation all-in-one, filtration unit and oxidation pond, also comprise sand pump, to the spiral pump of autoclave diaphragm pressure filter feed flow, the first medicine machine, second medicine machine, provides the 3rd medicine machine of medicament to described oxidation pond;
Described sieve mud all-in-one is the all-in-one of vibratory screening apparatus and silt remover composition, is that described silt remover is for slurry by described sand pump;
Described broken glue coagulation device comprises coagulation basin and in described coagulation basin, provides the first medicine machine of medicament, is provided with 3 cover stir shafts in described coagulation basin, often overlaps on stir shaft and is provided with 2 cover stir shaft blades; The body material of coagulation basin is carbon steel, and internal coat has epoxy heavy-duty anticorrosive coating.
Described autoclave diaphragm pressure filter is a kind of step pressure filtration facility, is just having level of automation high, and throughput is large, can under high pressure operate, the feature that floor space is little.The various process of this machine is all controlled by Electric Appliance Cabinet, runs by the program of programmable logic controller setting.
Described air supporting precipitation all-in-one comprises 1 cover inclined-plate clarifying basin, 1 cover microbubble generator and 2 cover the second medicine machines, 1 cover air compressor;
Described filtration unit comprises quartz filter, and activated charcoal filter, and microporous membrane filters, and closed accurate filter;
Be provided with 1 stir shaft in described oxidation pond, often overlap on described stir shaft and be provided with 2 stir shaft blades, the body material of oxidation pond is 304 stainless steels.
Use aforesaid device, the drilling fluid with following water-quality guideline is processed, suspended substance: >=20000mg/L, chemical oxygen demand (COD): >=2000mg/L, pH:6 ~ 9.
Embodiment 1
Use aforesaid device to carry out the method for well control fluid process, comprise the steps:
SS1, pre-treatment coagulation: waste liquid enters sieve mud all-in-one through sand pump, the macrobead high rigidity solid phase of drilling cuttings is comprised with removing, then waste liquid enters brokenly glue coagulation device, in the coagulation basin of broken glue coagulation device, glue coagulated agent sodium hydroxide 15000mg/L is added brokenly by the first medicine machine, about regulating its pH value to 13, stir 3min with the speed of 1r/s, the waste liquid after broken glue flocculation produces larger flocculation group, and separates out free-water;
SS2, solid-liquid separation: the floc sedimentation obtained through SS1 step process and free liquid mixture are transported to autoclave diaphragm filter by spiral pump, after filtering, filter cake moisture content drops to less than 60%;
SS3, second coagulation: send into air supporting precipitation all-in-one to the filtrate obtained after SS2 step process, add flocculant poly aluminum chloride 10mg/L by the second medicine machine, the air supporting that airfloat equipment produces can reduce BOD and the COD content in water under the help of flocculation agent;
SS4, filtration oxide treatment: by the liquid of step SS3 successively through quartz filter, and activated charcoal filter, and microporous membrane filters, and closed accurate filter filters, and reaches Effluent criteria; Then filtered water is introduced oxidation pond, and to add pH adjusting agent adjust ph by the 3rd medicine machine in water be 7, then oxygenant is added by the 3rd medicine machine, sterilant carries out sterilization and reduces COD, stirring velocity 1r/s, after oxide treatment, COD-Mn index is less than 30, suspended substance (SS) < 400.
Embodiment 2
Use aforesaid device to carry out the method for well control fluid process, comprise the steps:
SS1, pre-treatment coagulation: waste liquid enters sieve mud all-in-one through sand pump, the macrobead high rigidity solid phase of drilling cuttings is comprised with removing, then waste liquid enters brokenly glue coagulation device, in the coagulation basin of broken glue coagulation device, glue coagulated agent sodium hydroxide 18000mg/L is added brokenly by the first medicine machine, about regulating its pH value to 14, stir 3min with the speed of 1r/s, the waste liquid after broken glue flocculation produces larger flocculation group, and separates out free-water;
SS2, solid-liquid separation: the floc sedimentation obtained through SS1 step process and free liquid mixture are transported to autoclave diaphragm filter by spiral pump, after filtering, filter cake moisture content drops to less than 60%;
SS3, second coagulation: send into air supporting precipitation all-in-one to the filtrate obtained after SS2 step process, add flocculant poly aluminum chloride 25mg/L by the second medicine machine, the air supporting that airfloat equipment produces can reduce BOD and the COD content in water under the help of flocculation agent;
SS4, filtration oxide treatment: by the liquid of step SS3 successively through quartz filter, and activated charcoal filter, and microporous membrane filters, and closed accurate filter filters, and reaches Effluent criteria; Then filtered water is introduced oxidation pond, and to add pH adjusting agent adjust ph by the 3rd medicine machine in water be 8, then oxygenant is added by the 3rd medicine machine, sterilant carries out sterilization and reduces COD, stirring velocity 1r/s, after oxide treatment, COD-Mn index is less than 30, suspended substance (SS) < 400.
Embodiment 3
Use aforesaid device to carry out the method for well control fluid process, comprise the steps:
SS1, pre-treatment coagulation: waste liquid enters sieve mud all-in-one through sand pump, the macrobead high rigidity solid phase of drilling cuttings is comprised with removing, then waste liquid enters brokenly glue coagulation device, in the coagulation basin of broken glue coagulation device, glue coagulated agent sodium hydroxide 20000mg/L is added brokenly by the first medicine machine, about regulating its pH value to 14, stir 3min with the speed of 1r/s, the waste liquid after broken glue flocculation produces larger flocculation group, and separates out free-water;
SS2, solid-liquid separation: the floc sedimentation obtained through SS1 step process and free liquid mixture are transported to autoclave diaphragm filter by spiral pump, after filtering, filter cake moisture content drops to less than 60%;
SS3, second coagulation: send into air supporting precipitation all-in-one to the filtrate obtained after SS2 step process, add flocculant poly aluminum chloride 40mg/L by the second medicine machine, the air supporting that airfloat equipment produces can reduce BOD and the COD content in water under the help of flocculation agent;
SS4, filtration oxide treatment: by the liquid of step SS3 successively through quartz filter, and activated charcoal filter, and microporous membrane filters, and closed accurate filter filters, and reaches Effluent criteria; Then filtered water is introduced oxidation pond, and to add pH adjusting agent adjust ph by the 3rd medicine machine in water be 9, then oxygenant is added by the 3rd medicine machine, sterilant carries out sterilization and reduces COD, stirring velocity 1r/s, after oxide treatment, COD-Mn index is less than 30, suspended substance (SS) < 400.
Method through above-mentioned three embodiments processes waste water, all can reach following Effluent criteria:
Suspended substance≤400mg/l in effluent quality, chemical oxygen demand (COD)≤120mg/l, pH6-9.
The present invention is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection scope of the present invention.
Claims (10)
1. a treatment process for well control fluid, is characterized in that: comprise the steps:
S1, pre-treatment coagulation: first remove the macrobead high rigidity solid phase in waste liquid of drilling, then to adding brokenly glue coagulated agent sodium hydroxide in it, more than its pH value to 12 is regulated, stirring at low speed, waste liquid after broken glue flocculation produces larger flocculation group, and separates out free-water;
S2, solid-liquid separation: the waste liquid obtained through S1 step process being carried out solid-liquid separation by forcing filter press technique, making cake moisture drop to less than 60%;
S3, second coagulation: in the filtrate obtained after S2 step process, add flocculant poly aluminum chloride, carry out flocculating settling;
S4, filtration oxide treatment: according to waste liquid situation and Effluent criteria, carry out quartz sand filtration successively, and/or activated carbon filtration, and/or micro-pore-film filtration, and/or ultrafiltration, and/or nanofiltration, and/or reverse osmosis cascade filtration, reach Effluent criteria; Then in water, adding pH adjusting agent adjust ph is 6-9, then adds oxygenant, and sterilant carries out sterilization and reduces COD.
2. the treatment process of well control fluid according to claim 1, is characterized in that: the amount of the broken glue coagulated agent sodium hydroxide added in S1 is 15000-20000mg/l.
3. the treatment process of well control fluid according to claim 1 and 2, is characterized in that: in S1, stirring velocity is 1r/s, and churning time is 1-3min.
4. the treatment process of well control fluid according to claim 3, is characterized in that: the amount of the flocculant poly aluminum chloride added in S3 is 10-40mg/L.
5. the treatment process of well control fluid according to claim 4, is characterized in that: the filter cake obtained in S2 carries out drying and other treatment, and moisture is dropped to 20-30%, as fuel or fertilizer.
6. the equipment that uses of the treatment process of the arbitrary described well control fluid of claim 1-5, it is characterized in that: comprise the sieve mud all-in-one be linked in sequence successively, broken glue coagulation device, autoclave diaphragm pressure filter, air supporting precipitation all-in-one, filtration unit and oxidation pond, also comprise sand pump, to the spiral pump of autoclave diaphragm pressure filter feed flow, the first medicine machine, second medicine machine, provides the 3rd medicine machine of medicament to described oxidation pond;
Described sieve mud all-in-one is the all-in-one of vibratory screening apparatus and silt remover composition, is that described silt remover is for slurry by described sand pump;
Described broken glue coagulation device comprises coagulation basin and in described coagulation basin, provides the first medicine machine of medicament, is provided with at least a set of stir shaft in described coagulation basin, often overlaps on stir shaft and is provided with at least a set of agitating axle leaf sheet;
Described air supporting precipitation all-in-one comprises inclined-plate clarifying basin, airfloat equipment and the second medicine machine;
Described filtration unit comprises quartz filter, and/or activated charcoal filter, and/or microporous membrane filters, and/or closed accurate filter;
Be provided with at least a set of stir shaft in described oxidation pond, often overlap on described stir shaft and be provided with at least a set of agitating axle leaf sheet.
7. use the equipment described in claim 6 to carry out the method for well control fluid process, it is characterized in that: comprise the steps:
SS1, pre-treatment coagulation: waste liquid enters sieve mud all-in-one through sand pump, the macrobead high rigidity solid phase of drilling cuttings is comprised with removing, then waste liquid enters brokenly glue coagulation device, in the coagulation basin of broken glue coagulation device, glue coagulated agent sodium hydroxide is added brokenly by the first medicine machine, regulate more than its pH value to 12, stirring at low speed, the waste liquid after broken glue flocculation produces larger flocculation group, and separates out free-water;
SS2, solid-liquid separation: the floc sedimentation obtained through SS1 step process and free liquid mixture are transported to autoclave diaphragm filter by spiral pump, after filtering, filter cake moisture content drops to less than 60%;
SS3, second coagulation: send into air supporting precipitation all-in-one to the filtrate obtained after SS2 step process, add flocculant poly aluminum chloride by the second medicine machine, the air supporting that airfloat equipment produces can reduce BOD and the COD content in water under the help of flocculation agent;
SS4, filtration oxide treatment: according to waste liquid situation and Effluent criteria, successively through quartz filter, and
/ or activated charcoal filter, and/or microporous membrane filters, and/or closed accurate filter filters, and reaches Effluent criteria; Then filtered water is introduced oxidation pond, and in water, to add pH adjusting agent adjust ph by the 3rd medicine machine be 6-9, then add oxygenant by the 3rd medicine machine, sterilant carries out sterilization and reduces COD.
8. the treatment process of well control fluid according to claim 7, is characterized in that: the amount of the broken glue coagulated agent sodium hydroxide added in SS1 is 15000-20000mg/l.
9. the treatment process of well control fluid according to claim 8, is characterized in that: in SS1, stirring velocity is 1r/s, and churning time is 1-3min.
10. the treatment process of the well control fluid according to claim 6 or 7, is characterized in that: the amount of the flocculant poly aluminum chloride added in SS3 is 10-40mg/L.
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| CN201510507258.5A CN105130047A (en) | 2015-08-18 | 2015-08-18 | Well killing fluid processing method and equipment |
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| CN201510507258.5A CN105130047A (en) | 2015-08-18 | 2015-08-18 | Well killing fluid processing method and equipment |
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| CN105130047A true CN105130047A (en) | 2015-12-09 |
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| CN201510507258.5A Pending CN105130047A (en) | 2015-08-18 | 2015-08-18 | Well killing fluid processing method and equipment |
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| CN115028341A (en) * | 2022-04-25 | 2022-09-09 | 北京中科日升科技有限公司 | Solid-liquid separation and reuse method for waste water-based mud |
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Application publication date: 20151209 |