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Water-soluble drag-reducing agent for oil well

A water-soluble, drag-reducing agent technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problem of water-soluble drag-reducing agent being incombustible, etc., and achieve the effect of meeting the requirements of wax removal and viscosity reduction.

Active Publication Date: 2008-05-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the non-flammability of water-soluble drag reducers to solve the safety hazards of wax removal and viscosity reduction agents commonly used in oil wells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: The formula of water-soluble drag reducer is: glycol diacetate: 6%; Polyethylene polyamine polyoxypropylene polyoxyethylene ether: 28%; FC-N01 fluorocarbon surfactant: 0.05%; Methanol : 7%; water: 58.95%.

[0029] Preparation process: First, three raw materials of polyvinylidene polyamine polyoxypropylene polyoxyethylene ether, glycol diacetate and FC-N01 fluorocarbon surfactant are added in proportion to a 2000L mixing, heating, cooling and vacuum system Atmospheric pressure enamel reactor. Slowly raise the temperature to 90°C. Methanol was added under constant stirring, and after stirring was continued for 30 minutes, the heating was stopped. Stir while cooling, and cool to room temperature. Add water in proportion, stir while adding, and discharge after stirring for 20 minutes to obtain a water-soluble drag reducer.

Embodiment 2

[0030] Embodiment 2: The formula of water-soluble drag reducer is: glycol diacetate: 5%; Polyethylene polyamine polyoxypropylene polyoxyethylene ether: 13%; FC-N01 fluorocarbon surfactant: 0.02%; Methanol : 14%; Water: 67.98%.

[0031] Preparation process: First, three raw materials of polyvinylidene polyamine polyoxypropylene polyoxyethylene ether, glycol diacetate and FC-N01 fluorocarbon surfactant are added in proportion to a 2000L mixing, heating, cooling and vacuum system Atmospheric pressure enamel reactor. Slowly raise the temperature to 90°C. Methanol was added under constant stirring, and after stirring was continued for 30 minutes, the heating was stopped. Stir while cooling, and cool to room temperature. Add water in proportion, stir while adding, and discharge after stirring for 20 minutes to obtain a water-soluble drag reducer.

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Abstract

The invention relates to a noil well using water solubility friction-reducing additive that includes 2-10% biacetic acid glycol ester, 10-30% polyhypoethene polyamine polyoxy propylene polyethenoxy ether, 0.01-0.07% FC-N01 fluorocarbon surfactant, 5-15% methanol, and 45-70% water. It could meet the request of paraffin removal and viscosity reduction for oil well that has water content over 25%. The invention is also suitable for middle or high water contend oil well cold extraction and cold transferring.

Description

Technical field [0001] The invention relates to the technical field of oilfield chemistry, in particular to a water-soluble drag reducer for oil wells, a formulation of the water-soluble drag reducer for removing wax, preventing wax and reducing viscosity in oil wells with a water content greater than 25%, and a preparation method thereof. Background technique [0002] To maintain the normal oil production of oil wells, it is necessary to add drag-reducing agents such as wax remover, viscosity reducer, and wax preventive to the oil well. The wax remover, viscosity reducer and wax preventer used have good wax removal and viscosity reduction effects. Chinese patent, announcement number: 1200070, invention name: Viscosity and drag reduction agent for heavy oil wells, is exactly a kind of viscosity and drag reduction agent for heavy oil wells. It is made by C 7 -C 10 Aromatic hydrocarbon organic solvent, oil-soluble water-dispersed polyether demulsifier, lignin modified ampho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/575
Inventor 付亚荣蔡远红田炜李冬青刘建华
Owner PETROCHINA CO LTD
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