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Filtrate reducer for oil well cement and preparation method thereof

A fluid loss reducing agent, oil well cement technology, applied in the directions of chemical instruments and methods, drilling compositions, etc., can solve the problems of inconvenient long-distance transportation, unstable properties, and high equipment costs, and achieve long-term storage and long-distance transportation. The effect of fast dissolution speed and low production cost

Inactive Publication Date: 2011-10-19
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of polymer fluid loss reducer mostly adopts the method of solution polymerization and inverse emulsion polymerization. The content of solution products is generally not high, the highest is only about 20%-25%, and the rest is water phase; it is not convenient for long-distance transportation and Unstable in nature; solid-phase products are generally dried and pulverized, and kneaders are generally used in the drying process, which has high equipment costs and relatively large energy consumption; the effective content of inverse emulsion products can reach up to 40%, but there are also problems in storage. Issues such as stability and higher shipping costs

Method used

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  • Filtrate reducer for oil well cement and preparation method thereof
  • Filtrate reducer for oil well cement and preparation method thereof
  • Filtrate reducer for oil well cement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 1.05 g of sorbitan monostearate and 150 mL of cyclohexane into a 250 mL four-neck flask, heat to 50° C. and stir to dissolve sorbitan monostearate, then cool for use. Nitrogen was introduced for about 30 minutes, 5.49g NaOH was added into the beaker, dissolved in 10mL distilled water to obtain NaOH solution, cooled at room temperature for use. Add 25.844 g of 2-acrylamido-2-methylpropanesulfonic acid (AMPS), 2.975 g of N,N-dimethylacrylamide (NNDMA), and 0.602 g of maleic anhydride into a beaker and dissolve completely with 20 mL of distilled water Monomer solution was obtained. Place the monomer solution in an ice-water bath, slowly add the prepared NaOH solution dropwise therein, stir to mix evenly to obtain the prepared monomer solution, slowly drop it into a four-neck flask, and start heating to raise the temperature. When the temperature rose to 55°C, 0.149 g of ammonium persulfate solution was added. After a while, the reaction self-heated. After the end of...

Embodiment 2

[0031] Add 1.05 g of sorbitan monostearate and 150 mL of cyclohexane into a 250 mL four-neck flask, heat to 50° C. and stir to dissolve sorbitan monostearate, then cool for use. Nitrogen was introduced for about 30 minutes, 5.5g NaOH was added into the beaker, dissolved in 10mL distilled water to obtain NaOH solution, cooled at room temperature for later use. Add 25.844g of 2-acrylamido-2-methylpropanesulfonic acid, 2.8g of N,N-diethylacrylamide and 0.602g of fumaric acid into a beaker, and completely dissolve with 20mL of distilled water to obtain a monomer solution. Put the monomer solution in an ice-water bath, slowly add NaOH solution dropwise therein, stir to mix evenly to obtain a prepared monomer solution, drop slowly into a four-neck flask, and start heating to raise the temperature. When the temperature rose to 55°C, 0.149 g of ammonium persulfate solution was added. After a while, the reaction self-heated. After the end of the temperature rise, the temperature was ...

Embodiment 3

[0033]Add 1.05 g of sorbitan monostearate and 150 mL of cyclohexane into a 250 mL four-neck flask, heat to 50° C. and stir to dissolve sorbitan monostearate, then cool for use. Nitrogen was introduced for about 30 minutes, 5.49g NaOH was added into the beaker, dissolved in 10mL distilled water to obtain NaOH solution, cooled at room temperature for use. Add 25.9g of methacrylic acid, 2.9g of N,N-diethylacrylamide and 0.6g of fumaric acid into a beaker, and completely dissolve with 20mL of distilled water to obtain a monomer solution. Put the monomer solution in an ice-water bath, slowly add NaOH solution dropwise therein, stir to mix evenly to obtain a prepared monomer solution, drop slowly into a four-neck flask, and start heating to raise the temperature. When the temperature rose to 55°C, 0.149 g of ammonium persulfate solution was added. After a while, the reaction self-heated. After the end of the temperature rise, the temperature was controlled between 65°C and 70°C an...

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Abstract

The invention relates to a filtrate reducer for oil well cement and a preparation method thereof. The filtrate reducer for oil well cement is used in high-temperature deep wells and offshore oil wells for fixing wells.

Description

technical field [0001] The invention relates to an oil well cement fluid loss reducer and a preparation method thereof, in particular to a polymer oil well cement fluid loss reducer. Background technique [0002] Controlling the water loss properties of mud and cement slurries is very important during drilling and cementing. If the water loss is too large, it will not only deteriorate the performance of drilling fluid and cement slurry, affect drilling, cementing quality or cementing construction, but also cause a certain degree of damage to the reservoir. Therefore, the water loss of the slurry must be controlled as required. The usual way to control the amount of fluid loss is to add fluid loss additives. There are many materials used as fluid loss reducers in oilfields. Currently, AMPS (2-acrylamido-2-methylpropanesulfonic acid)-based polymer fluid loss reducers are commonly used. The preparation method of polymer fluid loss reducer mostly adopts the method of solution...

Claims

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Application Information

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IPC IPC(8): C09K8/487
Inventor 王清顺刘志宏崔光磊郭晓军冯克满宋维凯江文王学江
Owner CHINA NAT OFFSHORE OIL CORP
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