CN101892036A - Process for preparing drilling fluid for preventing polycrystalline diamond compact (PDC) bit balling - Google Patents
Process for preparing drilling fluid for preventing polycrystalline diamond compact (PDC) bit balling Download PDFInfo
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Abstract
The invention relates to a process for preparing drilling fluid, in particular to a process for preparing the drilling fluid for preventing polycrystalline diamond compact (PDC) bit balling. The process comprises a construction process and a dosage formula of treating agents and is characterized in that: according to the dosage formula, the treating agents are prepared by mixing clear water polymer original slurry, poly anionic cellulose (PAC), calcium carbonate (QS-4), carboxymethyl starch (CMS), sulfonated phenolic resin(SMP-2), water dispersible cation emulsified asphalt powder (SFT-1), sodium chloride(NaCl) and sodium formate (WT-1) in a mass ratio of 1,000:2-3:30-40:20-30:2-3:1.5-2:50-100:20; and the construction process comprises the following steps of: according to a circulation circle, uniformly mixing a coating agent PAC, a filtrate reducer CMS, a salt and high-temperature resistant filtrate reducer SMP-2 and an anti-sloughing lubricant SFT-1 for 12h at first; adding QA-4, NaCl, WT-1 into the mixture and uniformly mixing the mixture; and regulating the mixture to have a density Rho of 1.06 to 1.10g/cm<3>, a funnel viscosity T of 38 to 45s and an API water loss FL of 4 to 6ml. The process has the advantages of effectively preventing the balling of a sticking bit and a PDC bit at a lower curved section, reducing a frictional resistance and a torque, eliminating a sticking phenomenon, improving a mechanical drilling rate and ensuring downhole safety.
Description
Technical field
What the present invention relates to is a kind of drilling fluid blending process, particularly a kind of drilling fluid blending process of anti-PDC bit balling, and this technology is applicable to the prevention of the bit balling on stratum, Su Lige gas field " two stone layer ", belongs to field of oil drilling.
Technical background
Su Lige gas field " two stone layer " belongs to the Permian system, and the stratum depth of burial is about 3000m～3600m, and content of mudstone height in the stratum is easy to aquation and disperses, and interior shale of well or solid load are heightened, and is adsorbed in bit face and causes bit balling; Simultaneously this well section just in time is in the conversion of clear water polymkeric substance to well finishing liquid, and it is poor just to have transformed the back property of drilling fluid, and is big as dehydration, filter cake is thick, inhibition is poor, lubricity difference etc. all impacts when boring.Long characteristics of celebrating drilling well main office at present Su Lige gas field " two stone layer ", in conjunction with abundant situ of drilling well experience, successfully found out the sulphonated polymer mud Technology of a cover, and in practice over the past two years, brought into play crucial effect based on " wilkinite, sulfonated gilsonite powder, sulfonated phenol formaldehyde resin, high polymer " etc.But itself there is limitation in the sulphonated polymer mud system, and that inhibition is poor, solid load height, proportion rise is fast, the drilling fluid inhibition is poor, and the aquation of uncontrollable mud shale is disperseed; Solid load and sticking cut too highly, the landwaste that gets out is difficult to remove, and easily is adsorbed on bit face; Drilling fluid proportion is higher, and dehydration is big, easily forms blocked up coarse mud cake; Lubricity is poor, bit face can't form effective protective membrane, and the solid phase inferior in the drilling fluid easily is adsorbed on the drill bit, thereby causes the mud drum of PDC drill bit, has had a strong impact on the speed-raising in Su Lige gas field, becomes the technical bottleneck of restriction speed-raising.Especially mud drum problem performance more outstanding in the construction of horizontal well occurred once too much that PDC drill bit that mouthful well seriously causes because of " two stone layer " bit balling can't use and the down-hole accident of tooth-wheel bit spinning cones off.
PDC is the abbreviation of Polycrystalline Diamond Compact, and it is the abbreviation of polycrystalline diamond compact bit.It is petroleum drilling industry a kind of well drilling and rock crushing tool commonly used.
Summary of the invention
The drilling fluid blending process that the purpose of this invention is to provide a kind of anti-PDC bit balling, it is by adding macromole coating agent PAC on the basis of original copolymer magma, water retaining CMS, salt-resisting high-temperature-resisting filtration-reducing agent SMP-2, lubricant preventing landslide SFT-1, strong plugging agent QS-4, efficient treatment agent such as potent inhibitor organic salt WT-1 and inorganic salt NaCL, strong inhibition by system, low dehydration, strong shutoff, low solid phase, high-density, anti-salt calcium, resistant to pollution ability, effectively prevent at the sticking card of lower curved section and the mud drum of PDC drill bit, reduce frictional resistance and moment of torsion, eliminate sticking card phenomenon; Improve rate of penetration, guaranteed downhole safety.
Technical scheme of the present invention is achieved in that a kind of drilling fluid blending process of anti-PDC bit balling, comprise construction technology and treatment agent dosage prescription, it is characterized in that: treatment agent dosage prescription is to be prepared by following mass ratio by following component: clear water polymkeric substance magma: PAC: QS-4: CMS: SMP-2: SFT-1: NaCL: WT-1=1000: 2～3: 30～40: 20～30: 2～3: 1.5～2: 50～100: 20, and Properties Control: density p=1.06-1.10g/cm
3, funnel viscosity T=38-45s, API dehydration FL=4-6ml; Wherein, PAC is a Polyanionic Cellulose, QS-4 is 1250 order lime carbonate, and CMS is a carboxylic first class starch, and SMP-2 is a sulfonated phenol formaldehyde resin, SFT-1 is a water dispersible cationic emulsified bitumen powder, NaCL is a sodium-chlor, and WT-1 is a sodium formiate, and clear water polymkeric substance magma is to be prepared by following mass ratio by PAM, K-PAM component: PAM: K-PAM: clear water=1.5～2.5: 2～3: 1000, described PAM is a polyacrylamide, and K-PAM is a polyacrylic acid potassium; Reagent market is all on sale in the above-mentioned prescription.
The dosage screening formulation of described treatment agent is to be prepared by following mass ratio by following component: clear water polymkeric substance magma: PAC: QS-4: CMS: SMP-2: SFT-1: NaCL: WT-1=1000: 3: 30: 20: 2: 2: 50: 20, and Properties Control: density p=1.06-1.10g/cm
3, funnel viscosity T=38-45s, API dehydration FL=4-6ml; Wherein clear water polymkeric substance magma is to be prepared by following mass ratio by PAM, K-PAM component: PAM: K-PAM: clear water=2: 3: 1000.
Described carboxylic first class starch CMS is a carboxylic first class starch CMS-1 type.
Described construction technology is anti-mud drum drilling fluid blending process, it is to add coating agent PAC, water retaining CMS, salt-resisting high-temperature-resisting filtration-reducing agent SMP-2, lubricant preventing landslide SFT-1 earlier after full and uniform 12 hours by the circulating cycle, add evenly back measurement performance of QS-4, NaCL, WT-1 circulation again, and performance is adjusted at density p=1.06-1.10g/cm
3, funnel viscosity T=38-45s, API dehydration FL=4-6ml scope within.
Described treatment agent uses the dosing of high pressure mixing funnel when mixing, diesel engine speed is that 800-1000 changes, and discharge capacity is 24-28L/S.
The mechanism of action of the present invention is:
1, the drilling fluid of a kind of anti-PDC bit balling of the present invention adopts the anti-collapse and chemical anti-collapse comprehensive anti-collapse technical measures of physics.Before entering this well section, keep drilling fluid density at 1.28g/cm
3More than, remove the balance formation collapsed pressure with high fluid column pressure, reduce filter loss, strengthen inhibition, suitably improve viscosity, free water in the control drilling fluid is permeated to the stratum, preferred weight percent is that 1.5% SFT-1 is main anti-collapse dose simultaneously, is used 1250 order Paris white QS-4, and the control API filtration is at 4-6ml in the drilling process, adopt the anti-collapse technology of shielding shutoff, improve the integrity of the caving ground borehole wall and the caving-preventing ability of drilling fluid.API filtration is represented the power of leak-off, and appraisal drilling liquid filtrate enters the speed on stratum and the influence that drilling fluid may cause the stratum, and its unit is that ml, symbol are FL.
2, the drilling fluid of a kind of anti-PDC bit balling of the present invention cooperates the oilness of the raising system of strong plugging agent by the compound use of solid-liquid body lubricant.In the lower curved section drilling process,, cooperate solid lubricant, strengthen the oilness of drilling fluid, strengthen solid controlling, reduce frictional resistance, guarantee not because sticking card takes place the problem of drilling fluid based on liquid lubricant.Add liquid lubricant polymeric alcohol (XCS-3) on the one hand, and the solid lubricant Graphite Powder 99 (GD-2) of additional mass per-cent 0.3%, improvement of mud cake on the other hand, by strengthening the content that solid phase control reduces useless solid phase, in time replenish active solid phase, improve useful solid phase and in system, occupy ratio, the dosage of salt-resisting high-temperature-resisting filtration-reducing agents such as further increase SMP-2, composite use 1250 order lime carbonate (QS-4), water-dispersion emulsified bitumen powder (SFT-1) impels drilling fluid to form thin and tough mud cake.Enter the lower well section, should strengthen the dosage of liquid lubricant when being about to into window after hole deviation 80 degree,, further improve the lubricity of drilling fluid, control filter cake stuck factor all the time less than 0.05 with the 1-2% of content raising.By these measures, effectively reduce frictional resistance and moment of torsion, eliminate sticking card phenomenon.
3, the drilling fluid of a kind of anti-PDC bit balling of the present invention is taken sand, cleaning capacity by the suspension that strong coating agent and potent inhibitor strengthen system.Because lower curved section creeps into mainly based on mud stone, be subjected to drilling tool extruding formation landwaste cake parcel drilling tool increase frictional resistance etc. in order to prevent bit balling and landwaste, add sodium formiate (WT-1), KCl and shale control agent, the bag of raising system is suppressed ability, guarantee the integrity of drilling cuttings, improve the oilness of drilling fluid, reduce the cohesive force between the drilling cuttings, entering the construction later stage maintains the viscosity of drilling fluid more than 55 seconds, plastic viscosity is 25-35mp.s, yield value uses big discharge capacity to improve the erosion damage ability of drilling fluid to landwaste simultaneously greater than 8Pa as far as possible, takes the short trip operation to hang in case of necessity and pulls open evil idea etc.
4, the drilling fluid of a kind of anti-PDC bit balling of the present invention argillaceous phase not, during it was formed, PAC had viscosifying action concurrently when being suppressed effect plaing to wrap, and has certain anti-salt calcium ability; CMS still is that salt-water drilling fluid all has and better protects the glue ability at fresh water, can improve the yield value in brine system of mud, also can form thin and fine and close mud cake, reduces filter loss significantly and improves the toughness of mud cake; SFT-1 has the filter cake that good plugging action can form.Because the more special component of its system determines it to have the ability of fine anti-salt calcium, anti-stick soil pollution, stable performance.
5, the drilling fluid of a kind of anti-PDC bit balling of the present invention is to add the colloidal dispersion that forms after large, medium and small Molecularly Imprinted Polymer, inertia plugging material, the composite salt in the clear water polymeric system, because the system clay is low, eliminated in the mud subparticle to the influence of rate of penetration.It is long celebrating zone another low-soild fast drilling fluid after no solid phase clear water polymkeric substance.
6, the drilling fluid of a kind of anti-PDC bit balling of the present invention is because it has extremely low solid phase, higher salinity and strong inhibition, the aquation that has overcome mud stone is disperseed, compressible soft particle and rigid particles that while fluid loss agent and temporary plugging agent provide, under the effect of positive pressure differential, form thin and fine and close mud cake, can effectively prevent at the sticking card of lower curved section and the mud drum of PDC drill bit.
Principal feature of the present invention is:
1, low viscosity, low solid content, higher proportion, good flowability
The drilling fluid of a kind of anti-PDC bit balling of the present invention can be directly by the polymeric system conversion, convert back property of drilling fluid viscosity controller at T=38-45 second, ρ=1.06-1.10g/cm3, solid load at 6-7%.Low viscosity can effectively improve rate of penetration, and higher density can balance box 6, the caving pressure on box 7 stratum, has guaranteed downhole safety, low solid content, and good flowability can effectively be taken sand, alleviates the wearing and tearing to equipment.
2, low dehydration, the fine mud cake quality, the drilling fluid of good lubricity a kind of anti-PDC bit balling of the present invention has changeed dehydration less than 5ml, control easily, use later stage may command dehydration at FL=4-6ml, because the thin and fine and close mud cake of dehydration I to guarantee to form, can effectively stop the free water in the drilling fluid to enter the stratum, thereby guarantee the stable of long open hole section stratum, the fine mud cake quality is used liquid lubricant makes the frictional resistance between the drilling tool and the borehole wall reduce, enough prevent the long-time sticking card of drilling tool appearance when creeping into that slides thereby can have, reduce the backing pressure phenomenon.
3, strong rejection capability.
Strong rejection capability is the characteristics of maximum of the present invention, because adding sodium-chlor (NaCL) and formic acid are received (WT-1), has strengthened the inhibition of system, at Shi Qianfeng, further improves inhibition when the mud stone well section that stone box pulping is strong is crept into.Make drilling cuttings be difficult for aquation and disperse to sneak into drilling fluid, improved the efficient of removing drilling cuttings, the landwaste that uses composite salt aqueous systems vibratory screening apparatus to return out does not wrap vibratory screening apparatus, and degree of mixing is low, the borehole wall does not significantly degrade the piece phenomenon, and landwaste returns output normally to be strengthened greatly to the anti-collapse controllability of the layer that collapses.
Fill a prescription each component Chinese implication and function of treatment agent dosage of the present invention is as follows:
The PAC Polyanionic Cellulose, tackify degree coating agent;
QS-4 1250 order lime carbonate, strong plugging agent;
CMS carboxylic first class starch, the model C MS-1 that the water retaining of tackify, CMS comprise, CMS-2, CMS-3 etc.;
The SMP-2 sulfonated phenol formaldehyde resin, salt-resisting high-temperature-resisting filtration-reducing agent;
SFT-1 water dispersible cationic emulsified bitumen powder, lubricant preventing landslide.
Embodiment
Embodiment 1
1, the preceding requirement of sidetracking to straight well section drilling fluid
Will carry out the measure of block drilling liquid technology before sidetracking, anti-collapse full well section guarantees the emphasis of well rule as drilling fluid work.Require straight well section MDIA to enlarge and be controlled in 10%, maximum hole diameter expansion is controlled in 15%.
2, the conversion of drilling fluid:
Under the normal situation in straight well section down-hole, use polymer drilling fluid to drill top, Shi Qian peak mud making formation as far as possible.Thoroughly be converted into composite salt then and do not have soil phase drilling fluid system.
Under the abnormal situation in down-hole, when transforming, must join the sand of not taking out of in 40 side's coated slurries cleaning pit shaft, the dosage of carclazyte will be controlled at total mud amount and be no more than in 3% the scope.The prop-carrying capacity that will further improve mud will be by adding CMS-1 and inorganic salt are realized.
The conversion of drilling fluid will be undertaken by the anti-salt of horizontal well lower curved section, temperature resistance, the no soil phase composite salt system of strong inhibition, under lower curved section, drilling fluid thoroughly must be converted into anti-mud drum drilling fluid of the present invention before the PDC, its blending process, comprise construction technology and treatment agent dosage prescription, its treatment agent dosage screening formulation is to be prepared by following mass ratio by following component:
Clear water polymkeric substance magma: PAC: QS-4: CMS: SMP-2: SFT-1: NaCL: WT-1=1000: 3: 30: 20: 2: 2: 50: 20, Properties Control: density p=1.06-1.10g/cm
3, funnel viscosity T=38-45s, API dehydration FL=4-6ml; (density p=1.08g/cm
3, funnel viscosity T=42s, API dehydration FL=4ml be optimum value); Wherein, PAC is a Polyanionic Cellulose, tackified water retaining, QS-4 is 1250 order lime carbonate, CMS is carboxylic first class starch (CMS that present embodiment 1 adopts is a carboxylic first class starch CMS-1 type), SMP-2 is a sulfonated phenol formaldehyde resin, SFT-1 is a water dispersible cationic emulsified bitumen powder, NaCL is a sodium-chlor, WT-1 is a sodium formiate, clear water polymkeric substance magma is to be prepared by following mass ratio by PAM, K-PAM component: PAM: K-PAM: clear water=2: 3: 1000, described PAM are polyacrylamide, and K-PAM is a polyacrylic acid potassium; In the above-mentioned prescription reagent all equipment company of long celebrating drilling well main office on sale (telephone number: 029-86592203,029-86593879, address: China. Shaanxi. No. 151, not ended road, Xi'an).
Described construction technology is anti-mud drum drilling fluid blending process, it is to add coating agent PAC, water retaining CMS, salt-resisting high-temperature-resisting filtration-reducing agent SMP-2, lubricant preventing landslide SFT-1 earlier after full and uniform 12 hours by the circulating cycle, add evenly back measurement performance of QS-4, NaCL, WT-1 circulation again, and performance is adjusted at density p=1.06-1.10g/cm
3, funnel viscosity T=38-45s, API dehydration FL=4-6ml scope within.For making mixing of treatment agent, fully dissolving, described treatment agent must use the dosing of high pressure mixing funnel when mixing, and diesel engine speed is that 800-1000 changes, and discharge capacity is 24-28L/S.
3, prevent the drilling fluid measure that " two stone layer " collapses
The improvement that " two stone layer " collapses is the key of gas well horizontal well, and different with straight well is that the stratum of easily collapsing such as " two stone layers " just in time is in the long horizontal traverse well section.
In the maintenance system, under the prerequisite of low solid content, improve the density of drilling fluid by the content that increases inorganic salt and organic salt.Hole deviation is brought up to the 1.23-1.25 grams per cubic centimter less than 45 degree with density, gradually density is brought up to the 1.25-1.30 grams per cubic centimter in hole deviation greater than 45 degree, hole deviation reaches 60 degree must reach 1.30 with upper density, under the situation that the stratum pressure-bearing allows, if the down-hole has unsettled sign can bring up to 1.35 grams per cubic centimters.
Increase inorganic salt NaCL and organic salt WT-1 content in the drilling fluid, make the salinity of the salinity of drilling fluid,, improve the inhibition ability of drilling fluid the stratum by reducing the activity of water in the drilling fluid much larger than local water.The dosage that transforms for the first time salty mud salt is no less than 5% of mud amount.
Improve the content of temporary shielding blocking in the drilling fluid, increase the content of cationic emulsified bitumen powder SFT-1 and 1250 order lime carbonate QS-4.To reduce the caving pressure on stratum by effective shutoff.
The filter loss of strict control drilling fluid requires API filtration FL to be controlled at below the 5ml.
4, the maintenance technology of anti-PDC bit balling.
Guarantee to have in the system content of enough inhibitor, the content of inhibitor is mainly grasped by the performance of observation drilling cuttings and drilling fluid.Concrete: the one, the sand sample forming of mud stone section, not sticking wire screen.The 2nd, the performance of drilling fluid is crept in the mud stone section and is changed not quite, density, viscosity, contains and does not rise stable performance admittedly.Strengthen solid controlling, keep the content of low-density solid in the drilling fluid to remain lower level
5, the engineering measure of anti-PDC bit balling:
PDC drill bit drilling speed is fast, drilling cuttings is many, and enough discharge capacities must be arranged, and avoids the drilling cuttings Repeated Cutting can form mud and ball-up.Require the annular space up-hole velocity to reach the 1.00-1.20 meter per second.The pressure of the drill is reasonable, send and bores evenly, will suitably control the pressure of the drill when too fast during brill. and avoid slip long-time, long well section to creep into as far as possible.Lower curved section to completed 10 mouthfuls of wells sees, uses the drilling fluid blending process of a kind of anti-PDC bit balling of the present invention to solve the technical barrier of PDC bit balling fully.The success ratio of anti-PDC bit balling reaches 100%.
6, result of use evaluation:
Subordinate list: XX-XX bore hole hole diameter data contrast
Watch with parallel sidetracked hole that from XX-XX well neck eye this well XXXX uses sulphonated polymer mud system " two stone layer " that the serious complexity of caving in takes place when directly leading eye to creep into, electrical measurement is hampered, and maximum hole diameter amplification degree reaches 104.3%, diameter enlargement ratio 24.1%.XX tests this
After the system, tiltedly leading eye, to creep into the down-hole normal, " two stone layer " Shanxi group, and caving in does not appear in group leader coal seam, Benxi.First PDC drill bit that lower curved section uses, in identical well section, same formation, under the situation of identical bit model, rate of penetration reaches 5.13m/h, directly leads compared with last year and has improved 1.16m/h when eye creeps into, lower curved section finishing drilling electrical measurement is success once, hang inclination logging and reach 68 degree, the hole diameter rule map, diameter enlargement ratio only has 9.7%.
Anti-mud drum drilling fluid system of the present invention can directly be changed by polymeric system, convert stable performance after, only need carry out routine maintenance in the drilling process, if no down hole problem does not need to adjust significantly processing.From XX-XX well lower curved section property of drilling fluid as can be seen, this system is functional, and every technical indicator is good, has satisfied the construction requirement of lower curved section, has guaranteed the downhole safety of long open hole section.
Subordinate list: XX-XX well lower curved section property of drilling fluid recorder
Embodiment 2 is basic identical with embodiment 1, difference is that the treatment agent dosage prescription of drilling fluid of the present invention in the step 2 is to be prepared by following mass ratio by following component: clear water polymkeric substance magma: PAC: QS-4: CMS: SMP: SFT-1: NaCL: WT-1=1000: 2: 30: 20: 2: 1.5: 50: 20, and Properties Control: density p=1.06-1.10g/cm
3, funnel viscosity T=38-45s, API dehydration FL=4-6ml; Wherein clear water polymkeric substance magma is to be prepared by following mass ratio by PAM, K-PAM component: PAM: K-PAM: clear water=1.5: 2: 1000.The CMS that present embodiment 2 adopts is a carboxylic first class starch CMS-1 type.
Embodiment 3 is basic identical with embodiment 1, difference is that the treatment agent dosage prescription of drilling fluid of the present invention in the step 2 is to be prepared by following mass ratio by following component: clear water polymkeric substance magma: PAC: QS-4: CMS: SMP: SFT-1: NaCL: WT-1 is 1000: 3: 40: 30: 3: 2: 100: 20, Properties Control: density p was 1.06-1.10g/cm
3, funnel viscosity T=38-45s, API dehydration FL=4-6ml; Wherein clear water polymkeric substance magma is to be prepared by following mass ratio by PAM, K-PAM component: PAM: K-PAM: clear water=2.5: 3: 1000.The CMS that present embodiment 3 adopts is a carboxylic first class starch CMS-1 type.
CMS is not limited only to carboxylic first class starch CMS-1 type in the foregoing description, and it can also be other specifications and models such as carboxylic first class starch CMS-2 type, carboxylic first class starch CMS-3 type.Reagent in the foregoing description prescription is all available from long equipment company of drilling well main office, telephone number: 029-86592203,029-86593879, the address: China of celebrating. Shaanxi. and No. 151, not ended road, Xi'an.
It passes through to add efficient treatment agents such as macromole coating agent PAC, water retaining CMS, salt-resisting high-temperature-resisting filtration-reducing agent SMP-2, lubricant preventing landslide SFT-1, strong plugging agent QS-4, potent inhibitor organic salt WT-1 and inorganic salt NaCL drilling fluid blending process of the present invention on the basis of original copolymer magma, by the strong inhibition of system, low dehydration, strong shutoff, low solid phase, high-density, anti-salt calcium, resistant to pollution ability, effectively prevent mud drum at lower curved section PDC drill bit, reduce frictional resistance and moment of torsion, eliminate sticking card phenomenon; Improve rate of penetration, guaranteed downhole safety.
Claims (5)
1. the drilling fluid blending process of an anti-PDC bit balling, comprise construction technology and treatment agent dosage prescription, it is characterized in that: treatment agent dosage prescription is to be prepared by following mass ratio by following component: clear water polymkeric substance magma: PAC: QS-4: CMS: SMP-2: SFT-1: NaCL: WT-1 is 1000: 2～3: 30～40: 20～30: 2～3: 1.5～2: 50～100: 20, Properties Control: density p is that 1.06-1.10g/cm3, funnel viscosity T are that 38-45s, API dehydration FL are 4-6ml; Wherein, PAC is a Polyanionic Cellulose, QS-4 is 1250 order lime carbonate, and CMS is a carboxylic first class starch, and SMP-2 is a sulfonated phenol formaldehyde resin, SFT-1 is a water dispersible cationic emulsified bitumen powder, NaCL is a sodium-chlor, and WT-1 is a sodium formiate, and clear water polymkeric substance magma is to be prepared by following mass ratio by PAM, K-PAM component: PAM: K-PAM: clear water is 1.5～2.5: 2～3: 1000, described PAM is a polyacrylamide, and K-PAM is a polyacrylic acid potassium.
2. the drilling fluid blending process of a kind of anti-PDC bit balling according to claim 1, it is characterized in that: described treatment agent dosage prescription is to be prepared by following mass ratio by following component: clear water polymkeric substance magma: PAC: QS-4: CMS: SMP-2: SFT-1: NaCL: WT-1 is 1000: 3: 30: 20: 2: 2: 50: 20, Properties Control: density p was 1.06-1.10g/cm
3, funnel viscosity T is that 38-45s, API dehydration FL are 4-6ml; Wherein clear water polymkeric substance magma is to be prepared by following mass ratio by PAM, K-PAM component: PAM: K-PAM: clear water is 2: 3: 1000.
3. the drilling fluid blending process of a kind of anti-PDC bit balling according to claim 1 is characterized in that: described carboxylic first class starch CMS is a carboxylic first class starch CMS-1 type.
4. the drilling fluid blending process of a kind of anti-PDC bit balling according to claim 1, it is characterized in that: described construction technology is anti-mud drum drilling fluid blending process, it is to add coating agent PAC, water retaining CMS, salt-resisting high-temperature-resisting filtration-reducing agent SMP-2, lubricant preventing landslide SFT-1 earlier after full and uniform 12 hours by the circulating cycle, add evenly back measurement performance of QS-4, NaCL, WT-1 circulation again, and performance is adjusted at density p=1.06-1.10g/cm
3, funnel viscosity T is that 38-45s, API dehydration FL are within the scope of 4-6ml.
5. the drilling fluid blending process of described a kind of anti-PDC bit balling according to claim 1 and 2 is characterized in that: described treatment agent uses the dosing of high pressure mixing funnel when mixing, and diesel engine speed is that 800-1000 changes, and discharge capacity is 24-28L/S.
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| CN104610939A (en) * | 2015-01-09 | 2015-05-13 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Drilling fluid with low chloride ion concentration and preparation method thereof |
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| CN114233220A (en) * | 2022-01-13 | 2022-03-25 | 东北石油大学 | Method for reducing friction resistance of water-based drilling fluid mud cake with high harmful solid content |
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| CN102127402A (en) * | 2010-12-15 | 2011-07-20 | 中国海洋石油总公司 | High-temperature-resistant clay-phase-free hypotonic reservoir stratum drilling fluid |
| CN102352730A (en) * | 2011-10-27 | 2012-02-15 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Process for handling accident of jamming of drilling tool by settled sand |
| CN102352730B (en) * | 2011-10-27 | 2014-06-04 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Process for handling accident of jamming of drilling tool by settled sand |
| CN103589406B (en) * | 2013-11-14 | 2016-08-17 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | A kind of complex salt aqueous drilling fluid blocking cracks in coal seam and use technique thereof |
| CN103589406A (en) * | 2013-11-14 | 2014-02-19 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Compound saltwater drilling fluid for plugging fractures of coal seam |
| CN103923622A (en) * | 2014-04-17 | 2014-07-16 | 中国石油大学(华东) | Multielement compound saltwater drilling fluid |
| CN104046338A (en) * | 2014-06-16 | 2014-09-17 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Anti-collapse and leakproof drilling fluid and construction method thereof |
| CN104046338B (en) * | 2014-06-16 | 2017-02-01 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Anti-collapse and leakproof drilling fluid and construction method thereof |
| CN104497998A (en) * | 2015-01-09 | 2015-04-08 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Salt-resistant and high-temperature-resistant organic salt emulsion drilling fluid and preparation method thereof |
| CN104610939A (en) * | 2015-01-09 | 2015-05-13 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Drilling fluid with low chloride ion concentration and preparation method thereof |
| CN104497998B (en) * | 2015-01-09 | 2017-10-27 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | The organic salt emulsion drilling fluid and compound method of a kind of salt-resisting high-temperature-resisting |
| CN106753286A (en) * | 2016-12-09 | 2017-05-31 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | A kind of viscous low solid phase environmental protection drilling fluid high and preparation method thereof |
| CN109652032A (en) * | 2019-01-22 | 2019-04-19 | 北京宏勤石油助剂有限公司 | A kind of drilling fluid mud cake toughening modifying agent and preparation method thereof |
| CN112227959A (en) * | 2020-10-09 | 2021-01-15 | 江苏刘一刀精密机械有限公司 | Drill bit with self-lubricating protection function |
| CN112227959B (en) * | 2020-10-09 | 2023-09-22 | 江苏刘一刀精密机械有限公司 | Drill bit with self-lubricating protection function |
| CN114233220A (en) * | 2022-01-13 | 2022-03-25 | 东北石油大学 | Method for reducing friction resistance of water-based drilling fluid mud cake with high harmful solid content |
| CN114233220B (en) * | 2022-01-13 | 2022-06-03 | 东北石油大学 | Method for reducing friction resistance of water-based drilling fluid mud cake with high harmful solid content |
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