CN100362077C - Silicon fluorine anti-falldown filter agent for drilling fluid - Google Patents

Silicon fluorine anti-falldown filter agent for drilling fluid Download PDF

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Publication number
CN100362077C
CN100362077C CNB200510104799XA CN200510104799A CN100362077C CN 100362077 C CN100362077 C CN 100362077C CN B200510104799X A CNB200510104799X A CN B200510104799XA CN 200510104799 A CN200510104799 A CN 200510104799A CN 100362077 C CN100362077 C CN 100362077C
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drilling fluid
silicon
falldown
reactor
proportion
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CN1793278A (en
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宋福如
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Abstract

The present invention relates to a silicon-fluorine collapse preventing and filtration reducing agent for drilling fluid. After methyltri-fluorophenyl chlorosilane reacts with deionized water in a reactor, hydrochloric acid is removed, and products are transferred to a distilling vessel; next, the products are distillated in a pressure reducing mode, distillation fractions at 140 to 160 DEG C is obtained for the methyltri-fluorophenyl chlorosilane, namely DF<n>; the DF<n>, propene nitrile and vinyl acetate are used as raw materials and are put into the reactor to react; next, deionized water is added for hydrolysis, and prepared products are filtered in a pressing mode and then react with pretreated bentonite and pretreated brown coal alkali solution; thereby, generated fluid is dried by air flows to prepare the silicon-fluorine collapse preventing and filtration reducing agent for drilling fluid. The silicon-fluorine collapse preventing and filtration reducing is a novel treating agent with high efficiency for drilling fluid, and increases the zeta-potential of clay and the dispersivity of solid phases. The present invention has the advantages of fine and multiple granules, favorable hydration and thick dissolvent film, and a formed pressure cake is thin, compact and tough and has low permeability.

Description

Silicon fluorine anti-falldown filter agent for drilling fluid
(1), technical field
The present invention relates to the fluosilicic anti-collapse and anti-falling filtration agent that a kind of drilling fluid is used.
(2), background technology
In drilling process, but the drilling fluid leak-off enters the stratum.Drilling fluid is invaded the stratum can cause that shale hydration expands, and causes hole instability and various down hole problem when serious, bores when meeting pay sand and also can cause formation damage.The filtration property of reply drilling fluid is strictly controlled in the drilling engineering, and using suitable additive for drilling fluid is the effective ways that reduce filter loss and set up good building capacity.
(3), summary of the invention:
In order to overcome the shortcoming of prior art, the invention provides a kind of silicon fluorine anti-falldown filter agent for drilling fluid, it is a kind of novel high-efficient drilling fluid treatment agent, dispersiveness, the particle that has improved ξDian Wei, the solid phase of clay is thin and many, aquation good, the solvation thickness, the filter cake that forms is thin, fine and close, tough and tensile, rate of permeation is low, reduce the filter loss of drilling fluid, strengthen borehole wall caving-preventing ability.
The present invention solves the technical scheme that its technical problem takes: it comprises methyl trifluoro propyl chlorosilane, vinyl cyanide (CN), vinyl acetate between to for plastic (VAc), wilkinite, brown coal, caustic soda and water, and the weight ratio of each component is: 100: 25～35: 40～50: 15～25: 300～330: 10～20: 35～45.
Preparation technology of the present invention is: (1) methyl trifluoro propyl chlorosilane carries out chemical reaction in proportion with water in reactor, control reaction temperature＜60 ℃, after having reacted, drive hydrogenchloride, resultant is moved into distiller, underpressure distillation, gauge pressure-0.09MPa 140～160 ℃ of fractions of intercepting down is methyl trifluoro propyl cyclosiloxane (DF n); (2) with DF n, vinyl cyanide (CN) and vinyl acetate between to for plastic (VAc) be raw material, drops into reactor in proportion, carries out polyreaction in 50～80 ℃ under high-speed stirring; (3) add entry in the polymkeric substance that is generated, be forced into pressure in 110～130 ℃ and be no more than under the 0.5MPa and be hydrolyzed, the control section percent hydrolysis is 50～60%; (4) product of Xing Chenging after filtering, with pretreated wilkinite, brown coal and alkali lye in proportion 80～120 ℃ of reactions, resultant is prepared the SF silicon fluorine anti-falldown filter agent for drilling fluid through air stream drying, pulverizing.
The SF silicon fluorine anti-falldown filter agent for drilling fluid of present method preparation has good leak-off and the retaining wall anti sloughing effectiveness of falling.(1) effectively reduce quiet leak-off and moving leak-off, low-temp low-pressure filter loss (API) is in 10ml, and high temperature and high pre ssure filtration (HTHP) is less than 15ml; (2) improve the filter cake quality, thin, densification, toughness, oilness are good, and significant retaining wall and caving-preventing characteristic are arranged, and can avoid causing the generation of down hole problems such as bit freezing, well radius variations; (3) viscosity effect is little, has safeguarded the rheological that drilling fluid is good, is beneficial to improve mechanical efficiency and drill speed; (4) the temperature resistance ability is strong, resistance to crocking good, and use temperature reaches more than 180 ℃, is applicable to ground environment widely.
(4), embodiment
The present invention includes methyl trifluoro propyl chlorosilane, vinyl cyanide (CN), vinyl acetate between to for plastic (VAc), wilkinite, brown coal, caustic soda and water, the weight ratio of each component is: 100: 30: 45: 20: 320: 15: 40.
The present invention prepares according to the following steps:
(1) raw material is prepared, and chooses the fine raw material according to described component, and carries out quality test.
(2) trial-production equipment, three mouthfuls of glass reactors of 1000～3000ml, separating funnel, 5L stainless steel reactor, homogenizer, electrically heated cover, drying machine, vacuum pump and other auxiliary facility.
(3) methyl trifluoro propyl cyclosiloxane preparation: the methyl trifluoro propyl chlorosilane carries out chemical reaction in proportion with water in reactor, control reaction temperature＜60 ℃, after having reacted, drive hydrogenchloride, resultant is moved into distiller, underpressure distillation, gauge pressure-0.09MPa 140～160 ℃ of fractions of intercepting down is methyl trifluoro propyl cyclosiloxane (DF n).
(4) synthetic polymer: with DF n, vinyl cyanide (CN) and vinyl acetate between to for plastic (VAc) be raw material, drops into reactor in proportion, under high-speed stirring, carry out polyreaction and generate polymkeric substance in 50～80 ℃.
(5) polymkeric substance hydrolysis: add entry in the polymkeric substance that is generated, be forced into pressure in 110～130 ℃ and be no more than under the 0.5MPa and be hydrolyzed, the control section percent hydrolysis is 50～60%.
(6) the finished product: the product that hydrolysis obtains after filtering, with pretreated wilkinite, brown coal and alkali lye in proportion 80～120 ℃ of reactions, resultant is prepared the SF silicon fluorine anti-falldown filter agent for drilling fluid through air stream drying, pulverizing.
SF silicon fluorine anti-falldown filter agent for drilling fluid product application example:
Get 700 parts of distilled water, 3 parts of sodium bicarbonates, 25 parts of wilkinites, estimate soil and in container, mix for 20 parts, high-speed stirring 30 minutes, normal temperature lower seal maintenance 24 hours, recording its filter loss is that 23～26ml, apparent viscosity are 7 ~ 8MPa, starches as reference test with this.
Get said reference test slurry 350ml, add SF silicon fluorine anti-falldown filter agent for drilling fluid 3.5g (accounting for 1%), stirred 30 minutes in high speed agitator, recording its filter loss after being uniformly dispersed is that 9～10ml, apparent viscosity are 7～8MPa.Through 180 ℃, 24 hours thermal ageings, recording its filter loss on the high pressure high temperature filter tester device only was 14～15ml again.

Claims (1)

1. silicon fluorine anti-falldown filter agent for drilling fluid, it is characterized in that: it comprises methyl trifluoro propyl chlorosilane, vinyl cyanide, vinyl acetate between to for plastic, wilkinite, brown coal, caustic soda and water, and the weight ratio of each component is: 100: 25～35: 40～50: 15～25: 300～330: 10～20: 35～45;
Preparation technology is: (1) methyl trifluoro propyl chlorosilane carries out chemical reaction in proportion with water in reactor, control reaction temperature＜60 ℃, after having reacted, drive hydrogenchloride, resultant is moved into distiller, underpressure distillation, gauge pressure-0.09MPa 140～160 ℃ of fractions of intercepting down is DF for the methyl trifluoro propyl cyclosiloxane n(2) with DF n, vinyl cyanide and vinyl acetate between to for plastic be raw material, drops into reactor in proportion, carries out polyreaction in 50～80 ℃ under high-speed stirring; (3) add entry in the polymkeric substance that is generated, be forced into pressure in 110～130 ℃ and be no more than under the 0.5MPa and be hydrolyzed, the control section percent hydrolysis is 50～60%; (4) product of Xing Chenging after filtering, with pretreated wilkinite, brown coal and alkali lye in proportion 80～120 ℃ of reactions, resultant is prepared the SF silicon fluorine anti-falldown filter agent for drilling fluid through air stream drying, pulverizing.
CNB200510104799XA 2005-12-27 2005-12-27 Silicon fluorine anti-falldown filter agent for drilling fluid Active CN100362077C (en)

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Application Number Priority Date Filing Date Title
CNB200510104799XA CN100362077C (en) 2005-12-27 2005-12-27 Silicon fluorine anti-falldown filter agent for drilling fluid

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CN100362077C true CN100362077C (en) 2008-01-16

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100503768C (en) * 2006-09-14 2009-06-24 中国石化集团江苏石油勘探局 Usage method for double protection drilling fluid
CN102174314B (en) * 2011-03-09 2013-06-19 西南石油大学 Organic silicon fluid loss additive and preparation method thereof
CN105949393A (en) * 2016-06-04 2016-09-21 王金明 Preparation method for modified cellulose ether fluid loss agent
CN109181657A (en) * 2018-09-20 2019-01-11 河北硅谷化工有限公司 Drilling fluid anti-collapse and anti-falling filtration agent

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4671883A (en) * 1983-01-14 1987-06-09 Sandoz Ltd. Fluid loss control additives for oil-based well-working fluids
CN1165594C (en) * 2000-10-25 2004-09-08 宋福如 High-temperature viscosity reducer for drilling fluid and its production process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4671883A (en) * 1983-01-14 1987-06-09 Sandoz Ltd. Fluid loss control additives for oil-based well-working fluids
CN1165594C (en) * 2000-10-25 2004-09-08 宋福如 High-temperature viscosity reducer for drilling fluid and its production process

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