Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of neutral descaling agent and preparation method thereof

A descaling agent and neutral technology, applied in the field of neutral descaling agents and their preparation, can solve the problems of acidic descaling agents corroding pipe columns, low descaling rate and low safety of neutral descaling agents, etc. To achieve long-term stable operation prevention, reduce economic losses, operator and equipment safety effects

Active Publication Date: 2020-05-01
RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a neutral descaling agent and a preparation method thereof, which solves the problems of acidic descaling agents causing corrosion to pipe strings, high cost and low safety in the prior art, and the existing neutral descaling agent descaling low rate problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of neutral descaling agent and preparation method thereof
  • A kind of neutral descaling agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The neutral descaling agent in this implementation includes the following raw materials in parts by weight: 90 parts of supramolecular descaling agent monomer solution, 7 parts of surfactants, and 1 part of pH regulator; wherein, the supramolecular descaling agent The synthesis steps of the monomer solution are as follows: add 50 parts of absolute ethanol to the reaction kettle, then add 2 parts of polyethylene glycol, stir at 1000 r / min, and after completely dissolving, add 5 parts of p-aminobenzoic acid, Stir at 1000r / min for 10min, raise the temperature to 60°C, then add 7 parts of benzotriazole dropwise, and at the same time add acidic activated initiator dropwise, the dropping time is 25min. Raise the temperature to 80°C and react for 8 hours to obtain a supramolecular descaling agent monomer solution.

[0020] Described acid activation initiator synthetic steps are as follows:

[0021] Dissolve 3 parts of sodium silicate in 20 parts of absolute ethanol, stir and ...

Embodiment 2

[0026] The neutral descaling agent in this implementation includes the following raw materials by weight: 100 parts of supramolecular descaling agent monomer solution, 5 parts of surfactants, and 1 part of pH regulator; wherein, the supramolecular descaling agent The synthesis steps of the monomer solution are as follows: add 50 parts of absolute ethanol to the reaction kettle, then add 3 parts of polyethylene glycol, stir at 1000r / min, and after it is completely dissolved, add 5 parts of 4-aminobenzenesulfonic acid , stirred at 1000r / min for 10min, raised the temperature to 60°C, then added 8 parts of benzotriazole dropwise, and at the same time added dropwise the acidic activation initiator, and the dropwise addition time was 30min. Raise the temperature to 80°C and react for 8 hours to obtain a supramolecular descaling agent monomer solution.

[0027] Described acid activation initiator synthetic steps are as follows:

[0028] Dissolve 3 parts of sodium silicate in 20 part...

Embodiment 3

[0034] The neutral descaling agent in this implementation includes the following raw materials by weight: 101 parts of supramolecular descaling agent monomer solution, 10 parts of surfactants, and 1 part of pH regulator; wherein, the supramolecular descaling agent The synthesis steps of the monomer solution are as follows: add 50 parts of absolute ethanol to the reaction kettle, then add 2 parts of polyethylene glycol, stir at 1000 r / min, and after completely dissolving, add 6 parts of p-aminobenzoic acid, Stir at 1000r / min for 10min, raise the temperature to 60°C, then add 9 parts of benzotriazole dropwise, and at the same time add dropwise the acidic activated initiator for 20min. Raise the temperature to 80°C and react for 8 hours to obtain a supramolecular descaling agent monomer solution.

[0035] Described acid activation initiator synthetic steps are as follows:

[0036] Dissolve 2 parts of sodium silicate in 20 parts of absolute ethanol, stir and dissolve at room temp...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a neutral descaling agent and a preparation method of the neutral descaling agent. The neutral descaling agent comprises a supramolecular descaling agent monomer solution, a surfactant and a pH adjuster. A supramolecular descaling agent monomer is prepared by adopting the special raw material proportioning ratio, is safe and long-acting and does not chemically react with scale and metal; through dispersion and molecular assembly, stripping and scale decomposition are achieved, and finally stable adhesion to the metal surface can be achieved; and oil scale, dirt, crystalscale, rust scale and the like which are difficult to clean by conventional chemical cleaning can be removed, a compact protective film is formed, long-term stable operation of an oil well can be maintained, subsequent scale formation can be prevented, and long-acting descaling and scale inhibition can be achieved.

Description

technical field [0001] The invention belongs to the technical field of descaling agents, and in particular relates to a neutral descaling agent and a preparation method thereof. Background technique [0002] Scaling of downhole tubing strings in oilfields will lead to shutdown of oil and water wells, decreased production, and shortened service life. At present, the commonly used descaling agents in oil fields are mainly acidic systems. Descaling with acid liquid will corrode the pipe string, resulting in damage to the pipe string, resulting in increased cost, shortened production cycle, or even shutdown; at the same time, the treated pipe string will still continue to scale , resulting in a scaling-descaling cycle. [0003] However, the addition of strong acid cleaning agent is large, corrosive, and toxic. The whole cleaning process is water-intensive, labor-intensive, time-consuming, and pollutes the environment. It is dangerous to both equipment and operators, and there a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/24
CPCC23G1/24
Inventor 孙德旭吴琼贾庆升高志卫王海燕李琳梁秀红尚朝晖渠慧敏戴群
Owner RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC