CN104419392A - While-drilling sealing temporary plugging agent (FB) for petroleum drilling fluid - Google Patents

While-drilling sealing temporary plugging agent (FB) for petroleum drilling fluid Download PDF

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Publication number
CN104419392A
CN104419392A CN201310393879.6A CN201310393879A CN104419392A CN 104419392 A CN104419392 A CN 104419392A CN 201310393879 A CN201310393879 A CN 201310393879A CN 104419392 A CN104419392 A CN 104419392A
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plugging agent
temporary plugging
drilling
animal
drilling fluid
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卢廷建
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/02—Well-drilling compositions
    • C09K8/03—Specific additives for general use in well-drilling compositions
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/08—Fiber-containing well treatment fluids

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention relates to petroleum and natural gas drilling techniques, and relates to a while-drilling sealing temporary plugging agent (FB) for petroleum drilling fluid. The while-drilling sealing temporary plugging agent is produced from waste ardealite and straw in process proportions, and can be used for effectively shielding and temporarily plugging micro cracks. Pollution of overflowing of drilling fluid to soil can be reduced as the drilling fluid can be degraded. According to the scheme, the while-drilling sealing temporary plugging agent is characterized by comprising the following raw materials in percentage by weight: 20-35% of animal and plant fibers, 40-60% of ardealite, 5-20% of coarse whiting, 1-25% of hydroxymethyl cellulose and 1.5-2% of an adhesive. Preferably, the following components in percentage by weight are mixed: 30-35% of f animal and plant fibers, 45-50% of ardealite, 5-10% of coarse whiting, 11-17% of hydroxymethyl cellulose and 1.5-2% of the adhesive. In the drilling process, the plugging agent which accounts for 0.5% of mud liquid is added while every 1% of the liquid level is reduced, leaking points can be completely plugged, and the plugging agent is discharged out in the well washing operation after well drilling is completed. As ardealte is adopted as a base material in the plugging agent, salinization of the soil caused by the mud liquid in the reverse discharging process in the well completing process is effectively alleviated.

Description

Petroleum drilling fluid closes temporary plugging agent (FB) with brill
Technical field
The present invention relates to oil and gas exploration, production technique, specifically one utilizes work, agricultural wastes phosphogypsum and animal and plant fiber proportioning production petrochemical industry drilling fluid to close temporary plugging agent (FB) with brill, and this product has a better role to the pollution of the slurry liquid be discharged in petroleum drilling in environment to environment.
Background technology
The object one of oil drilling is in order to look for oil and gas layer and correctly evaluates hydrocarbon-bearing pool resource, and two is in order to development of fields to greatest extent.In drilling process, drilling fluid is as the blood of drilling engineering, and be use maximum materials in drilling process, prices are rather stiff for it.According to statistics, every mouthful of Oil/gas Well verified, in the fund that drilling well expends, 30% is for drilling fluid.Because rock stratum is different with geologic framework, in drilling process, the borehole wall can produce breach in various degree and crackle, causes drilling fluid to leak or the leakage of the whole borehole wall, makes the slurry liquid serious leak of its proportioning.Because proportioning in slurry liquid has different chemical materialss, leak the loss not only causing slurry liquid, also can infiltrate rock seam because of the binding profound level in mud and form cured article, the perforation of hydrocarbon zone is polluted and blocked, later stage well-flushing effectively instead can not be discharged, cause damage to hydrocarbon zone.The hydrocarbon zone that should be found is not found fully, to explored hydrocarbon zone, owing to suffering damage, causes production capacity to reduce, make the oil-gas storage amount calculated lower than true reserves, directly affect oil-gas field production capacity.The leakage of drilling mud fluid makes drilling cost improve, and causes immeasurable financial loss.
Along with going deep into of oilfield prospecting developing; reservoir protection is more and more subject to the attention of oil circle personage; and the reservoir protection material of onsite application can not meet the needs of vapour oil layer protection and protection of the environment to greatest extent; therefore be necessary to study a kind of crack easy to use in drilling process, the rapid closed rock stratum surface of a wound under individual event pressure; the temporary plugging agent of the energy available protecting oil gas borehole wall, flows back in environment simultaneously and does not damage to soil after completion.
Summary of the invention
The object of the invention is in the deficiency in order to overcome above-mentioned technology existence, providing a kind of and integrate environmental protection, borehole wall shield-temporary plugging, reservoir protection, leakproof, the rapid oil gas-bearing formation that blocks up close leak stopping temporary plugging agent.
The technical scheme that the present invention is adopted to achieve these goals is as follows: a kind of petroleum drilling fluid is with closing temporary plugging agent, it is characterized in that: the raw material comprising following weight percent, animal and plant fiber 20 ~ 35%, phosphogypsum 40 ~ 60%, coarse whiting 5 ~ 20%, hydroxylmethyl cellulose 1 ~ 25%, tackiness agent 1.5% ~ 2%.
The proportioning be more preferably in the present invention is, each raw material mixes by following weight percent, animal and plant fiber 30 ~ 35%, phosphogypsum 45% ~ 50%, coarse whiting 5 ~ 10%, hydroxylmethyl cellulose 11 ~ 17%, tackiness agent 1.5 ~ 2%.
The PetroChina Company Limited. of the present invention drilling fluid preparation method closing temporary plugging agent, is characterized in that comprising the following steps:
1), first animal and plant fiber is extracted: (A): straw is cut into 5 ~ 8 centimetres; (B): utilize solvent to be soaked by stalk to moisture content 20 ~ 30%, cheat pond and stack 72 hours; (C): for subsequent usely after defibrator process in the environment of 80 ~ 90 DEG C make usable fibers grain; (D): by animal fur by being cut into 0.5cm after salt water enchroachment (invasion) bubble 2size, by 80 ~ 90 DEG C of defibrator process, makes animal fibre grain; (E): two kinds of fiber grains are pressed animal fibre 2%, to become can be used for produce the fibrous material of temporary plugging agent for subsequent use for the proportions of stalk fibre 25%.Animal fibre is thin and snappiness is good, and stalk fibre is thick, hard, has certain rigidity, and two kinds of fibers reach is furnished with the strong body of effect formation multistage suede saw, and in temporary plugging agent, effectively go into close fabric by proportioning, plugging effect is more remarkable.Solvent in step (B) is the solvent mixed by softener and salt.
2), by for subsequent use for phosphogypsum primary breakup;
3) after, raw material being mixed by the composition proportion described in claim 1 or 2, use multistage rolling whipping device, stir 45 ~ 70 minutes, when oven dry of evenly rolling in the equipment of 60 DEG C is 1%-3% to moisture content, by different size class criteria, ball milling sieves formation finished product, then packaging carry out damp-proof treatment to packaging.In the more preferably described step 2 of preparation method, different size rank standard scores is 40 orders and 80 orders---100 two kinds, order standards.
Animal and plant fiber can be bonded on coarse whiting and phosphogypsum by the tackiness agent in the present invention, makes the density of animal and plant fiber be greater than water, thus circulates in slurry liquid moving process, be sunken in slurry liquid.
PetroChina Company Limited. of the present invention drilling fluid leak sealing temporary plugging agent, its proportioning calculates the ratio of determining to add according to the stoichiometric factor of residing environment and mud.
Phosphogypsum in the present invention is the by product of phosphoric acid by wet process, industrial waste.China's phosphogypsum quantity discharged about 5,000 ten thousand tons in 2008, accounts for more than 70% of industry by-product gypsum.Produce 1 ton of phosphoric acid (in 100%P2O5) about by-product phosphogypsum 5 tons.Therefore, current China phosphogypsum adds up volume of cargo in storage more than more than 100,000,000 tons, grave danger to environment structure.
Due to the special conditions that this material produces, make this material possess mineral filler character, have that chemical purity is high, inertia greatly, not easily chemical reaction, Heat stability is good, can not decompose below 400 DEG C, the advantage such as canescence, oil absorbency are low, refractive index is low, matter is soft, dry, a little crystal water, the low wear(ing)value of hardness are little, nontoxic, odorless, good dispersity.Different grain size requirement can be provided as required to carry out secondary processing.This material accounts for the ratio of closed temporary plugging agent more than 30%.Salinization to soil when the use of this material can improve that drill-in fluid is counter arranges physical environment, to environment protection important role.(Shanxi Agricultural scientific literature " effect of phosphogypsum improvement alkaline land soil chemical property " researcher: car along Sheng Luo three strongest ones, Luo Hui experimental irrigation station of Shaanxi Province Dali 715105).
The present invention is in drilling process, according to the observation to drilling fluid front cover value, closing temporary plugging agent (suitable adjustment can be carried out according to leakage situation) with brill and adding with brill in drilling well of slurry liquid proportioning 5 ‰ is added by liquid level decline 1%, such temporary plugging agent will form a thin and close fiber cake at the pore throat of the borehole wall and the borehole wall, its leakage point is blocked, drilling fluid is no longer leaked, reduces the consumption of drilling fluid, save drilling cost.In the process that drilling well completes, by normal clean-out service, the fiber cake being attached to the borehole wall will decompose rapidly, discharge in the lump with flushing fluid, if the region that pore throat is darker, meeting carbonization in acid cleaning process, can not cause damage to Oil/gas Well, ensure the dialysis of reservoir, because this closed temporary plugging agent employs phosphogypsum as base-material, this material has obvious improvement result (from Research Literature: (Shanxi Agricultural scientific literature " effect of phosphogypsum improvement alkaline land soil chemical property " researcher: car is along Sheng Luo three strongest ones to salt affected soil, Luo Hui experimental irrigation station of Shaanxi Province Dali 715105).The salinization of a large amount of slurry liquid to soil that drilling well is washed in # process in anti-row's environment is curbed, is improved the broken ring effect of ejecta to soil, thus protects environment.
Stalk fibre in the present invention and phosphogypsum can be widely used in oil and gas exploration, exploitation slurry liquid, use, play knitmesh and crane span structure supporting role in product efficacy as with the main raw material boring temporary plugging agent.Comparison similar with other, other industrial chemicals that replacement with good conditionsi is used at present.The application of this material is not only equally authentic, also possesses and reduces or eliminate the pollution that drilling fluid, flushing fluid are counter to edatope when arranging the earth, overflow play effective improvement result to the salinization of soil to drilling fluid.
The present invention is also the comprehensive utilization to trade waste and agricultural wastes, not only has economic worth, also has great social value.
Embodiment
Below technical scheme of the present invention is described in detail.
Embodiment 1: a kind of petroleum drilling fluid, with closing temporary plugging agent, comprises the raw material of following component proportioning, animal and plant fiber 20%, phosphogypsum 60%, coarse whiting 15%, hydroxylmethyl cellulose 3.5%, tackiness agent 1.5%.Its preparation method is: 1), first extract animal and plant fiber: (A): straw is cut into 5 ~ 8 centimetres; (B): utilize solvent to be soaked by stalk to moisture content 20 ~ 30%, cheat pond and stack 72 hours; (C): for subsequent usely after defibrator process in the environment of 80 ~ 90 DEG C make usable fibers grain; (D): by animal fur by being cut into 0.5cm after salt water enchroachment (invasion) bubble 2size, by 80 ~ 90 DEG C of defibrator process, makes animal fibre grain; (E): two kinds of fiber grains are pressed animal fibre 2%, to become can be used for produce the fibrous material of temporary plugging agent for subsequent use for the proportions of stalk fibre 25%.Animal fibre is thin and snappiness is good, and stalk fibre is thick, hard, has certain rigidity, and two kinds of fibers reach is furnished with the strong body of effect formation multistage suede saw, and in temporary plugging agent, effectively go into close fabric by proportioning, plugging effect is more remarkable.Solvent in step (B) is the solvent mixed by softener and salt.
2), by for subsequent use for phosphogypsum primary breakup:
3) after, raw material being mixed by the composition proportion described in claim 1 or 2, use multistage rolling whipping device, stir 45 ~ 70 minutes, when oven dry of evenly rolling in the equipment of 60 DEG C is 1%-3% to moisture content, by different size class criteria, ball milling sieves formation finished product, then packs, and carries out damp-proof treatment to packaging.
The application indexes of the temporary plugging agent that the present embodiment is made and physical and chemical index are as following table: wherein standard index take Q/72084246-4.2-2010 as standard.Table one
Project Standard index The present embodiment product index
Leakage mud amount, ml ≤15 12
The leak sealing time, s ≤90 60
Fineness (40 mesh standard sieve throughput) % ≥95 2.8
The present embodiment is envrionment temperature 23 DEG C, humidity (RH): when 50%, wastage is less than 12, is 97.2% by target sieve; The leak sealing time is less than 60 seconds.
Embodiment 2: a kind of petroleum drilling fluid, with closing temporary plugging agent, comprises the raw material of following component proportioning, straw splitting fiber 35%, phosphogypsum 40%, coarse whiting 12%, hydroxylmethyl cellulose 11%, tackiness agent 2%.Its preparation method is as embodiment 1.
The application indexes of the temporary plugging agent that the present embodiment is made and physical and chemical index are as following table: wherein standard index is for standard with Q/72084246-4.2-2010 with wherein standard index.Table two
Project Standard index The present embodiment product index
Leakage mud amount, ml ≤15 9
The leak sealing time, s ≤90 40
Fineness (40 mesh standard sieve throughput) % ≥95 4
The present embodiment is in envrionment temperature at 23 DEG C, humidity (RH): when 50%, wastage is less than 9, is 96% by target sieve; The leak sealing time is less than 40 seconds.
Embodiment 3: a kind of petroleum drilling fluid, with closing temporary plugging agent, comprises the raw material of following component proportioning, straw splitting fiber 30%, phosphogypsum 57%, coarse whiting 10%, hydroxylmethyl cellulose 1%, tackiness agent 2%.It is as embodiment 1.
The application indexes of the temporary plugging agent that the present embodiment is made and physical and chemical index are as following table: wherein standard index take Q/72084246-4.2-2010 as standard.Table three
Project Standard index The present embodiment product index
Leakage mud amount, ml ≤15 11
The leak sealing time, s ≤90 30
Fineness (40 mesh standard sieve throughput) % ≥95 4
The present embodiment is in envrionment temperature at 23 DEG C, humidity (RH): when 50%, wastage is less than 11, is 96% by target sieve; The leak sealing time is less than 30 seconds.
Embodiment 4: a kind of petroleum drilling fluid, with closing temporary plugging agent, comprises the raw material of following component proportioning, straw splitting fiber 25%, phosphogypsum 45%, coarse whiting 20%, hydroxylmethyl cellulose 8%, tackiness agent 2%.As embodiment 1.
The application indexes of the temporary plugging agent that the present embodiment is made and physical and chemical index are as following table: wherein standard index take Q/72084246-4.2-2010 as standard.Table four
Project Standard index The present embodiment product index
[0036]
Leakage mud amount, ml ≤15 12
The leak sealing time, s ≤90 45
Fineness (40 mesh standard sieve throughput) % ≥95 4
The present embodiment is in envrionment temperature at 23 DEG C, humidity (RH): when 50%, wastage is less than 12, is 96% by target sieve; The leak sealing time is less than 45 seconds.
Embodiment 5: a kind of petroleum drilling fluid, with closing temporary plugging agent, comprises the raw material of following component proportioning, straw splitting fiber 23%, phosphogypsum 45%, coarse whiting 5%, hydroxylmethyl cellulose 25%, tackiness agent 2%.Its preparation method is as embodiment 1.
The application indexes of the temporary plugging agent that the present embodiment is made and physical and chemical index are as following table: wherein standard index take Q/72084246-4.2-2010 as standard.Table five
Project Standard index The present embodiment product index
Leakage mud amount, ml ≤15 12
The leak sealing time, s ≤90 50
Fineness (40 mesh standard sieve throughput) % ≥95 4
The present embodiment is in envrionment temperature at 23 DEG C, humidity (RH): when 50%, wastage is less than 12, is 96% by target sieve; The leak sealing time is less than 50 seconds.
Embodiment 6: a kind of petroleum drilling fluid, with closing temporary plugging agent, comprises the raw material of following component proportioning, straw splitting fiber 23%, phosphogypsum 46.4%, coarse whiting 12%, hydroxylmethyl cellulose 17%, tackiness agent 1.6%.Its preparation method is as embodiment 1.
The application indexes of the temporary plugging agent that the present embodiment is made and physical and chemical index are as following table: wherein standard index take Q/72084246-4.2-2010 as standard.Table six
Project Standard index The present embodiment product index
Leakage mud amount, ml ≤15 12
The leak sealing time, s ≤90 48
Fineness (40 mesh standard sieve throughput) % ≥95 4
The present embodiment is in envrionment temperature at 23 DEG C, humidity (RH): when 50%, wastage is less than 12, is 96% by target sieve; The leak sealing time is less than 48 seconds.
Embodiment 7: a kind of petroleum drilling fluid, with closing temporary plugging agent, comprises the raw material of following component proportioning, straw splitting fiber 23%, phosphogypsum 50%, coarse whiting 18%, hydroxylmethyl cellulose 17%, tackiness agent 2%.Its preparation method is as embodiment 1.
The application indexes of the temporary plugging agent that the present embodiment is made and physical and chemical index are as following table: wherein standard index take Q/72084246-4.2-2010 as standard.Table seven
Project Standard index The present embodiment product index
Leakage mud amount, ml ≤15 12
[0049]
The leak sealing time, s ≤90 50
Fineness (40 mesh standard sieve throughput) % ≥95 4
The present embodiment is in envrionment temperature at 23 DEG C, humidity (RH): when 50%, wastage is less than 12, is 96% by target sieve; The leak sealing time is less than 50 seconds.
This product is carried out quality monitoring and leak sealing effect and compatibility evaluation experimental by company standard Q/728084264-4-2001, and measure it at calcium soil paste emphasis leakage mud amount (ml) and leak sealing time (s), test result is as following table:
Leakage mud amount (ml) table, table eight
Leak sealing time (s) is shown, table nine
Product of the present invention is carried out compatibleness test respectively in multiple mud system, and Experiment of Compatibility table is as follows:
Table ten
Table ten one
A in table ten starches composition and includes calcium soil paste, PHP, XY-27, ammonium salt, sulfonated gilsonite, and B starches composition and comprises calcium starching, FA367, XY-27, SMP.1, NaHPAN; C starches composition and comprises sodium soil paste, CUD, CPF, FRH and barium sulfate.
In table: P: density, T: funnel viscosity (s), APl: filter loss, K: hmc, PV: plastic viscosity, YP, yield value.
Soil improves experiment: salt affected soil, because its grogs has adsorbed more sodium ion, makes soil tilth poor.After using phosphogypsum, add calcium ion content in soil, the sodium ion of grogs absorption is cemented out by calcium ion, thus Soil exghangeable sodium is reduced.Can be drawn by testing data, according to every 667m2 execute phosphogypsum 200,300,400,500kg process, Sodium by substitution reduces by 49.17%, 48.05%, 53.90% and 61.66% respectively, on average reduces by 53.19%; Contrast reduction by 38.81%, executes than not executing average Sodium by substitution reducing amount many 14.38%.Topsoil basicity data before and after test, every 667m2 execute phosphogypsum 200,300,400, the process of 500kg, alkalization of soils degree reduces 35.61%, 37.59%, 46.84% and 52.47% respectively, average 43.13%; Check plot basicity reduces 38.94%, executes reduction by 34.18% more than the average basicity do not executed.Under this test conditions, phosphogypsum consumption is larger, and the effect of its improvement surface soil alkalinity is more obvious.
Front and back soil profile (0 ~ 100cm) salt dynamics tested by table ten two
Minute CK Ⅰ Ⅱ Ⅲ Ⅳ
[0066]
Salinity (%) before examination 0.571 0.599 0.513 0.462 0.26
Salinity (%) after examination 0.458 0.455 0.379 0.353 0.390
Ratio of desalinization (%) 19.70 24，04 26，12 23，59 37.70
Data in table ten and table ten one except leakage mud amount, be constant temperature 140 DEG C except the leak sealing time, maintenance 16 hours, records at 50 DEG C.
Can find out from the various embodiments described above and test card this temporary plugging agent be close quick, use the features such as efficient, easy construction, integrate the new oil gas-bearing formation temporary plugging agent material of shield-temporary plugging, reservoir protec-tion, leakproof, leak stopping, utilization of waste material.Good improvement result can be produced to environment, can rapidly, effectively close microfracture, porosity stratum permeability loss, can add in mud with brill, can not be sifted out by vibratory screening apparatus, formation plays the effect of leakproof, leak stopping,
Situation described in table ten two shows, employs this product and will effectively improve to the salinization of ambient soil to anti-flushing fluid, drilling mud spilling etc. of discharging in environment.
Secondly, this temporary plugging agent adopts phosphogypsum and stalk fibre to be main raw material(s), good bridge joint supporting role is had by the phosphogypsum after process, easily stratum reticulare is intertwined to form with stalk fibre, and multiple-layer stacked can be formed under the pressure reduction of leakage point, compared with similar products, there is better economic benefit and practicality, and cost is lower.

Claims (4)

1. petroleum drilling fluid is with closing a temporary plugging agent, it is characterized in that: the raw material comprising following weight percent, animal and plant fiber 20 ~ 35%, phosphogypsum 20 ~ 40%, coarse whiting 5 ~ 20%, hydroxylmethyl cellulose 1 ~ 25%, tackiness agent 1.5% ~ 2%.
2. petroleum drilling fluid according to claim 1 is with closing temporary plugging agent, it is characterized in that: described animal and plant fiber 30 ~ 35%, phosphogypsum 40 ~ 60%, coarse whiting 5 ~ 10%, hydroxylmethyl cellulose 11 ~ 17%, tackiness agent 1.5 ~ 2%.
3. the petroleum drilling fluid preparation method closing temporary plugging agent, is characterized in that comprising the following steps:
1), first animal and plant fiber is extracted: (A): straw is cut into 5 ~ 8 centimetres; (B): utilize solvent to be soaked by stalk to moisture content 20 ~ 30%, cheat pond and stack 72 hours; (C): for subsequent usely after defibrator process in the environment of 80 ~ 90 DEG C make usable fibers grain; (D): by animal fur by being cut into 0.5cm after salt water enchroachment (invasion) bubble 2size, by 80 ~ 90 DEG C of defibrator process, makes animal fibre grain; (E): two kinds of fiber grains are pressed animal fibre 2%, the fibrous material that the proportions of stalk fibre 25% becomes can be used for produce temporary plugging agent is for subsequent use, animal fibre is thin and snappiness is good, stalk fibre is thick, hard, have certain rigidity, two kinds of fibers reach is furnished with the strong body of effect formation multistage suede saw, effectively goes into close fabric by proportioning in temporary plugging agent, plugging effect is more remarkable, and the solvent in step (B) is the solvent mixed by softener and salt;
2), by for subsequent use for phosphogypsum primary breakup;
3) after, raw material being mixed by the composition proportion described in claim 1 or 2, use multistage rolling whipping device, stir 45 ~ 70 minutes, when oven dry of evenly rolling in the equipment of 60 DEG C is 1%-3% to moisture content, by different size class criteria, ball milling sieves formation finished product, then packaging carry out damp-proof treatment to packaging.
4. according to claim 3-kind of petroleum drilling fluid preparation method closing temporary plugging agent, is characterized in that: described step 2) in different size rank standard scores be 40 orders and 80 orders---100 two kinds, order standards.
CN201310393879.6A 2013-09-03 2013-09-03 While-drilling sealing temporary plugging agent (FB) for petroleum drilling fluid Pending CN104419392A (en)

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Application publication date: 20150318