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Preparation method of paraffin inhibitor for oil wells

A wax inhibitor, oil well technology, applied in chemical instruments and methods, mechanical equipment, drilling compositions, etc., can solve problems such as poor viscosity reduction effect and unsatisfactory effect, achieve good wax inhibitor effect, and inhibit paraffin wax. The effect of depositing, improving fluidity

Inactive Publication Date: 2017-08-11
常州蓝森环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main technical problem to be solved by the present invention is to provide a method for preparing wax inhibitors for oil wells in view of the defects that traditional wax inhibitors have unsatisfactory effects on paraffin deposition in high water content oil wells and oil gathering pipelines, and have poor viscosity-reducing effects.

Method used

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  • Preparation method of paraffin inhibitor for oil wells

Examples

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Effect test

example 1

[0019] First weigh 1kg of papermaking black liquor and filter to obtain the filtrate, add the filtrate to the beaker, then add 60mL of sulfuric acid solution with a mass fraction of 15% in the beaker, and move the beaker into a digital speed measuring constant temperature magnetic stirrer. 110°C and a rotating speed of 300r / min, stir and react at a constant temperature for 2 hours, then filter to obtain a filter residue. Take 40g of the filter residue and place it in a beaker filled with 200mL of 5% sodium sulfite solution, and place the beaker in an oil bath. Control the temperature of the oil bath at 140°C, heat and stir the reaction for 3 hours. After the reaction is completed, place the material in the beaker in a rotary evaporator, and concentrate it to dryness by rotary evaporation to obtain a dried product. Then take 20 g of the dried product and add it to a container filled with 100 mL of water. and place the three-necked flask in a water bath, control the temperature o...

example 2

[0021]First take by weighing 1kg of papermaking black liquor and filter to obtain the filtrate, add the filtrate to the beaker, then add 70mL of sulfuric acid solution with a mass fraction of 15% in the beaker, and move the beaker into a digital speed measuring constant temperature magnetic stirrer, at a temperature of Under the conditions of 115°C and a rotating speed of 350r / min, stir and react at a constant temperature for 2 hours and then filter to obtain a filter residue. Take 45g of the filter residue and place it in a beaker containing 250mL of a 5% sodium sulfite solution, and place the beaker in an oil bath. Control the temperature of the oil bath at 145°C, heat and stir the reaction for 3 hours. After the reaction is completed, place the material in the beaker in a rotary evaporator, and concentrate it to dryness by rotary evaporation to obtain a dry product. Then take 25g of the dry product and add it to a container filled with 150mL of water. and place the three-nec...

example 3

[0023] First take by weighing 2kg of papermaking black liquor and filter to obtain the filtrate, add the filtrate to the beaker, then add 80 mL of sulfuric acid solution with a mass fraction of 15% in the beaker, and move the beaker into a digital speed measuring constant temperature magnetic stirrer, at a temperature of Under the conditions of 120°C and a rotating speed of 400r / min, stir and react at a constant temperature for 3 hours and then filter to obtain a filter residue. Take 50g of the filter residue and place it in a beaker filled with 300mL of 5% sodium sulfite solution, and place the beaker in an oil bath. Control the temperature of the oil bath at 150°C, keep warm and stir for 4 hours. After the reaction is over, put the material in the beaker in a rotary evaporator, and concentrate it to dryness by rotary evaporation to obtain a dry product. Then take 30g of the dry product and 0.5g of ferric sulfate and add into a three-necked flask filled with 200mL of water, an...

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Abstract

The invention discloses a preparation method of a paraffin inhibitor for oil wells and belongs to the technical field of petroleum applied chemistry. The preparation method comprises: extracting lignin from papermaking black liquor, treating with sodium sulfite to obtain a lignosulfonate, oxidizing the lignosulfonate, grafting to acrylic acid to obtain a lignin-based viscosity reducer, ball-milling corn starch to reduce its crystallinity, oxidizing, reacting with maleic anhydride to obtain a starch-based surfactant which may form a polar film on both the wall of an oil well and the surface of paraffin particles to prevent deposition of paraffin crystal, and mixing with an aid to obtain the paraffin inhibitor for oil wells. The paraffin inhibitor prepared herein has good paraffin inhibitory effect for both oil collection lines and oil wells having different water contents; the concentration of the paraffin inhibitor varies little in a shaft, batch peeling of paraffin and jamming of a well are rarely caused, and the paraffin inhibitor has a promising application prospect.

Description

technical field [0001] The invention discloses a preparation method of a wax inhibitor for oil wells, belonging to the technical field of petroleum applied chemistry. Background technique [0002] Paraffin deposition is an important problem in the process of oil gathering, transportation, storage and transportation. The temperature of the oil well produced fluid keeps dropping during the process of rising from the bottom of the well to the surface in the tubing. When the temperature of the fluid flow is lower than the wax precipitation point of crude oil, paraffin crystals will be precipitated and paraffin crystals will be deposited on the surface of the sucker rod and the tubing. Deposition phenomenon on the inner wall. The waxing problem of the surface oil gathering pipeline is similar to the waxing problem of the oil well, which is caused by the temperature of the liquid flow being lower than the waxing point of crude oil. The paraffin deposited in the oil well and the ...

Claims

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Application Information

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IPC IPC(8): C09K8/524F17D1/17
CPCY02E60/34C09K8/524F17D1/17
Inventor 石磊王维孙冬
Owner 常州蓝森环保设备有限公司
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