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; sol

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

Example Embodiment

[0028] Example 1:

[0029] Add 1.05 g of sorbitan monostearate and 150 mL of cyclohexane to a 250 mL four-necked flask, heat to 50° C. and stir to dissolve sorbitan monostearate, and then cool for use. Nitrogen was introduced for about 30 minutes, 5.49 g of NaOH was added to the beaker, and 10 mL of distilled water was dissolved to obtain a NaOH solution, which was cooled at room temperature for use. Add 25.844g 2-acrylamido-2-methylpropanesulfonic acid (AMPS), 2.975g N,N-dimethylacrylamide (NNDMA) and 0.602g maleic anhydride into a beaker and dissolve it completely with 20mL distilled water Monomer solution was obtained. The monomer solution was placed in an ice-water bath, and the prepared NaOH solution was slowly added dropwise to it, stirred to make it evenly mixed to obtain a prepared monomer solution, which was slowly added dropwise to the four-necked flask, and began to heat up. When the temperature rose to 55°C, 0.149 g of ammonium persulfate solution was added. Lat...

Example Embodiment

[0030] Example 2:

[0031] Add 1.05 g of sorbitan monostearate and 150 mL of cyclohexane to a 250 mL four-necked flask, heat to 50° C. and stir to dissolve sorbitan monostearate, and then cool for later use. Nitrogen was introduced for about 30 min, 5.5 g of NaOH was added to the beaker, and 10 mL of distilled water was dissolved to obtain a NaOH solution, which was cooled at room temperature for use. 25.844g of 2-acrylamido-2-methylpropanesulfonic acid, 2.8g of N,N-diethylacrylamide and 0.602g of fumaric acid were added to the beaker and completely dissolved in 20mL of distilled water to obtain a monomer solution. The monomer solution was placed in an ice-water bath, and NaOH solution was slowly added dropwise to it, and the mixture was stirred to obtain a prepared monomer solution. When the temperature rose to 55°C, 0.149 g of ammonium persulfate solution was added. Later, the reaction appears self-heating phenomenon. After the temperature rise, the temperature was contro...

Example Embodiment

[0032] Example 3:

[0033]Add 1.05 g of sorbitan monostearate and 150 mL of cyclohexane to a 250 mL four-necked flask, heat to 50° C. and stir to dissolve sorbitan monostearate, and then cool for use. Nitrogen was introduced for about 30 minutes, 5.49 g of NaOH was added to the beaker, and 10 mL of distilled water was dissolved to obtain a NaOH solution, which was cooled at room temperature for use. 25.9 g of methacrylic acid, 2.9 g of N,N-diethylacrylamide and 0.6 g of fumaric acid were added to the beaker, and were completely dissolved in 20 mL of distilled water to obtain a monomer solution. The monomer solution was placed in an ice-water bath, and NaOH solution was slowly added dropwise to it, and the mixture was stirred to obtain a prepared monomer solution. When the temperature rose to 55°C, 0.149 g of ammonium persulfate solution was added. Later, the reaction appears self-heating phenomenon. After the temperature rise, the temperature was controlled between 65°C and...

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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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