• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to the oil and gas industry and can be used as a dispersant for aqueous drilling fluids. The goal is to improve the rheological properties of the solution. It contains water and a dispersant, which is used as a water-soluble copolymer, mol.m. below 1 . 10 5 usd.ed. The copolymer is obtained by copolymerization of 7.5.0 - 98.4 mol.% Of a mixture of acrylic and methacrylic acids and 1.6 - 25.0 mol.% Of water-soluble allyl and / or metallic sulphonate of an alkali metal or ammonium. The mixture of acids contains 0.35 - 3.95 wt. including acrylic acid and 1 wt. including methacrylic acid. The dispersant content in the solution is 0.01-10.00 g per liter. These copolymers are obtained by radical polymerization in an aqueous solution of acrylic and methacrylic acids together with allyl and / or sodium or ammonium sulfonate. 5 tab.
    公开号:SU1530098A3
    申请号:SU864027462
    申请日:1986-05-12
    公开日:1989-12-15
    发明作者:Оранж Жак
    申请人:Рон-Пуленк Спесьялитэ (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to drilling fluids, namely to the use of an acrylic copolymer as a dispersant for aqueous drilling fluids.
    The purpose of the invention is to improve the rheological properties of the drilling fluid.
    The drilling fluid contains water and a dispersant in an amount of from 0.01 to 10.00 g per 1 liter of solution. As a dispersant, a water-soluble copolymer with a molecular weight below 1 to 10 conventional units is used, obtained by copolymerization from 75 to 98.4 mol.% Acrylic and methacrylic acid and
    from 1.6 to 25.0 mol% of an alkali metal or ammonium allyl and / or metal sulfonate soluble in water. Moreover, acrylic and methacrylic acids are taken in a ratio of 0.35-3.95 wt.h. acrylic acid to 1 wt. methacrylic acid.
    These copolymers can be obtained by radical polymerization in an aqueous solution of acrylic and methacrylic acid together with sodium or ammonium allyl and / or metallic sulphonate. As a catalyst for the formation of free radicals, hydrogen peroxide can be used in
    SP
    with
    ;about
    00
     cm
    mixtures with isopropyl alcohol in the presence of small amounts of a copper salt, the latter can be replaced by a certain amount of hydroxylamine sulfate or hydrogen peroxide with an iron salt (ferric acid iron) and hydroxylamine sulfate, or sodium or ammonium persulfate in the presence of acetic acid.
    The resulting polymer solution can be used in this form as a dispersant for drilling mud, but it can be concentrated by any known method or the copolymer can be isolated as a powder.
    The resulting copolymer has a molecular weight of from 500 to 10,000 and most often from 2,000 to 6,000.
    Dispersant is effective in small quantities (0.01 g) dry extract (per 1 liter of solution). A disperser is usually used in amounts from 0.05 to 1 g per liter of drilling mud, although it is possible to use large quantities, for example, up to 10 g. Preferred amounts are between 0.1 and 0.4 g / l.
    The inventions are illustrated by the following examples.
    Example 1. Getting a dispersant. The solution was A, g: Desalinated water 350 Copper acetate 0.5 Metal Sodium Sulfonate 5 Isopropanol 50 and Solution B, g: - Desalted water 450 Acrylic acid 230 Methacrylic acid 230
    Methyl Sulfonate Sodium 50
    In a 2 liter reactor, equipped with a stirrer and three tubes to supply nitrogen, monomers and catalyst, respectively, solution A is placed under nitrogen. The solution is heated with a reflex with stirring and de-aeration, then 100 g of solution B and 12 ml of hydrogen peroxide are introduced in 110 volumes . Withstand the solution without stirring, then, without disagreement, 860 g of solution B and 68 ml of hydrogen peroxide are gradually introduced at a time for 1 hour and 30 minutes. 10 ml of hydrogen peroxide are added, the solution is heated with reflux for a period of
    0
    five
    0
    five
    five
    0
    five
    0
    five
    0
    30 min, then 10 ml of hydrogen peroxide are added again and kept at reflux for 1 h 30 min.
    The solution is concentrated by vacuum distillation, and the system is cooled.
    The concentrate contains 49.5% dry extract and has a density of 1.185. Brookfield viscosity is equal to 1,300 mPa s (model RV - needle K 2).
    Middleweight mol. polymer weight W 4000.
    The hydrodynamic diameter of the particles in the scattering of light in a solution with 5.1 g / l angstroms.
    Receiving drilling mud.
    The drilling mud is obtained from softened water and bentonite clay ,. 410 g of bentonite FB5 and 600 g of bentonite FP2 (commercial products of CECA) were introduced into 8.9 l of water with a yield of 35 m and 15 m of solution per ton of clay, respectively, the yield was determined in a known manner.
    The pH is adjusted to 9.5 by the addition of caustic soda. The mixture is stirred for 3 minutes by means of a ULTRATURRAX turbine, rotating from 15,000 rpm, and cooled to 25 ° C.
    The drilling fluid is divided into several aliquots. A dispersant is added to each part in varying amounts (Table 1). Again for 30 seconds served in the turbine. Set aside for 30 minutes, after which the rheological characteristics are determined using a FAMN model 35A viscometer at 25 C.
    The apparent viscosity V ,, plastic viscosity Vp, the yield strength or the performance index YV, the gel number Gel at the beginning and after 10 minutes the gel 0/10 is measured.
    For comparison, the properties of ferrochrome lignosulfonate used according to a known method (Brixel brand of CECA) are measured.
    The test results are presented in table 1.
    - From Table 1 it can be seen that the rheological properties of the dispersion of the present invention are improved compared with the solution containing ferrochrome lignosulfonate, since the viscosity and gel number used to measure mud thickening are much smaller.
    Example2. On the solution obtained in example 1, explore the dispersion properties of the dispersant at high temperature.
    Each batch of drilling mud after adding a dispersant to it at a given concentration (Table 2) is introduced into the chamber and subjected to stirring in a rotary kiln for 16 hours at 90, 120 or 150 C.
    The results of rheological measurements carried out after thermal tests are presented in table 2.
    From Table 2 it can be seen that the proposed dispersant remains effective at high temperature and is much more effective than ferrochrome lignosulfonate.
    From a comparison of the values of the yield threshold before rotation and after at different temperatures at a concentration of 2 g per 1 l of solution, it can be seen that the average yield strength is 3.5 for the proposed product with 49.5% dry extract and 30 for ligno-sulfrnate with 100% dry extract
    Examples 3-10. In accordance with Example 1, but the amount of sulfonate changes and maintaining a constant ratio between acrylic acid and methacrylic acid, the corresponding copolymers are obtained.
    Each polymer is introduced into the drilling fluid obtained according to Example 1 in an amount of 0 g, 1 g (dry extract) per 1 l of the solution. Initial rheological properties are measured after mixing and settling for 30 minutes.
    Table 3 summarizes the amounts of monomers used, expressed in moles, the composition of the terpolymer (molar ratio of acrylic acid to
    five
    0
    five
    0
    tacrylic is the number of molar percent sulphonate), as well as measurement results.
    Examples 11-16. The copolymers of example 1 are prepared by varying the molar ratio between acrylic acid and methacrylic acid.
    The composition of the terpolymer and the results of the initial rheological measurements of the drilling fluid (0.1 g of dispersant per liter) are presented in Table 4.
    Examples 17-23. According to these examples, a dispersant is prepared using either acrylic or methacrylic acid. The evaluation of the properties of the obtained copolymer was produced in the same way as in the previous examples.
    The compositions and measurement results are presented in table.5.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A drilling fluid comprising water and a dispersant, characterized in that, in order to improve its rheological properties, it contains as a dispersant a water-soluble mol.m. below
    1-10 conventional units, obtained by copolymerization of 75.0-98.4 mol.% Of a mixture of acrylic and methacrylic acids and 1.6-25.0 mol.% Of water-soluble allyl- and / or metallic sulphonate alkali 5 solid metal or ammonium, and the mixture of acrylic and methacrylic acids contains O, 35 ... 3.95 rec. acrylic acid to 1 wt. methacrylate acid, and the dispersant content in the drilling mud is 0.01-10.00 g / l.
    0
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    同族专利:
    公开号 | 公开日
    DK218586A|1986-11-14|
    AU583920B2|1989-05-11|
    AU5735186A|1986-12-18|
    US4738788A|1988-04-19|
    GR861224B|1986-09-04|
    BR8602121A|1987-01-13|
    NO861846L|1986-11-14|
    ES8705018A1|1987-04-16|
    ES554867A0|1987-04-16|
    FR2581651B1|1988-02-26|
    FR2581651A1|1986-11-14|
    TR22863A|1988-09-19|
    EP0202995A1|1986-11-26|
    DK218586D0|1986-05-12|
    MA20675A1|1986-12-31|
    CA1263225A|1989-11-28|
    DE3665477D1|1989-10-12|
    EP0202995B1|1989-09-06|
    CN86102915A|1986-11-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EA013827B1|2007-01-12|2010-08-30|Эм-Ай ЭлЭлСи|Wellbore fluids for casing drilling|US2552775A|1948-03-20|1951-05-15|Union Oil Co|Drilling fluid|
    US3203938A|1961-11-10|1965-08-31|American Cyanamid Co|Process for copolymerizing an alkali metal ethylene sulfonate in lower saturated alcohols with free radical polymerization catalysts|
    US3730990A|1969-08-01|1973-05-01|Hitachi Ltd|Implosion-proof cathode-ray tube|
    US3761410A|1971-03-22|1973-09-25|Nl Industries Inc|Composition and process for increasing the lubricity of water base drilling fluids|
    US4085167A|1972-12-06|1978-04-18|Rohm And Haas Company|Carboxylic polymeric thickeners|
    DE2444108C2|1974-09-14|1978-01-19|Hoechst Ag|WATER-BASED CLAY FLUSHING FOR DEEP HOLES AND THE USE OF A MIXED POLYMERIZED FOR SUCH FLUSHING|
    US4451628A|1982-09-13|1984-05-29|Celanese Corporation|Process for preparing low molecular weight water-soluble polymers by copolymerizing with water-soluble monomers a calculated quantity of methallylsulfonate monomer|
    DE3461810D1|1983-05-20|1987-02-05|Allied Colloids Ltd|Water soluble polymers|DE3833045A1|1988-09-29|1990-04-05|Henkel Kgaa|DRILLING ADDITIVES BASED ON A POLYMERIC MIXTURE, THEIR USE AND METHOD OF MANUFACTURING THE SAME|
    JP2587480B2|1988-11-09|1997-03-05|株式会社日本触媒|Additive for drilling mud|
    US5032295A|1989-04-25|1991-07-16|National Starch And Chemical Investment Holding Corporation|Polymers for use in drilling muds|
    IT1255519B|1992-09-24|1995-11-09|Agip Spa|PRE-TREATED CLAYS, THEIR PREPARATION AND USE IN THE FORMULATION OF NON-AGGRESSIVE DRILLING SLUDGE TOWARDS THE LAYER CLAYS|
    WO2015110297A1|2014-01-24|2015-07-30|Basf Se|New antiscalants|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR8507189A|FR2581651B1|1985-05-13|1985-05-13|DISPERSANTS FOR DRILLING FLUIDS AND DRILLING FLUIDS CONTAINING SAME|
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