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Scale inhibitor and descaling agent and preparation method thereof

A scale remover and anti-scaling technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of short validity period of scale inhibitors and scale removers, aggravated corrosion of downhole tools, complicated on-site construction technology, etc. Good descaling effect, short descaling time, and improved operating efficiency

Active Publication Date: 2022-08-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present application provides a scale inhibitor and its preparation method, which can solve the problems in the related art that the scale inhibitor is short in validity, expensive, intensified the corrosion of downhole tools by acid liquid, and the on-site construction process is complicated.

Method used

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  • Scale inhibitor and descaling agent and preparation method thereof
  • Scale inhibitor and descaling agent and preparation method thereof

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preparation example Construction

[0050] On the other hand, the embodiment of this application provides a method of preparation of scale -resistant and dirt, which is used to prepare the above -mentioned one of the dirt and division agent. This method includes:

[0051] According to the weight of each component, the reference time is added after adding water, anti-infrastructure, and stuning agent in turn. Salva removal agent.

[0052] Furthermore, the amount of water consumption is 98.271-98.944 part of the water as the base solution. Sodium), stir for 10 minutes, add 0.004-0.006 sulfur ether, 0.004-0.005 parts of methylated single-scale polyamine, 0.005-0.01 parts of hydrolyzed polymeric anhydride, 0.01-0.02 parts of carboxyl anecidal ethylenevyl two-based ethylenevylvida ethylvida Phosphate, 0.15-0.4 parts of sodium dulate, and stirred for 5-10 minutes to obtain a dirt removal agent.

Embodiment 1

[0055] Take 98.271 parts of water as a base solution, add 0.2 part of potassium chloride, then add 0.004 sodium sodium salt, 0.005 parts of glucose acid potassium, stir for 10 minutes, then add 0.004 sulfur ether, 0.004 0.004 Paquerized monocular polyamine, 0.005 parts of hydrolyzed polymeric anhydride, 0.01 parts carboxyl anethinyl phosphate, 0.15 part of sodium dulate benzene sodium, stir for 5 minutes to obtain dirt and dirt removable agent Essence

Embodiment 2

[0057] Take 98.271 parts of water as a base solution, add 0.2 part of potassium chloride, then add 0.004 sodium sodium salt, 0.006 copies of glucose acid potassium, stir for 10 minutes, and then add 0.006 sulfur ether, 0.004 0.004 Paquerized monocular polyamine, 0.008 part of hydrolyzed polymeric anhydride, 0.01 part of carboxyl anethinyl phosphate, 0.2 sodium dulate benzene sulfate, stir for 6 minutes to obtain dirt and dirt removal agent Essence

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Abstract

The application discloses a scale inhibitor and descaling agent and a preparation method thereof, belonging to the field of oilfield exploitation. The scale inhibition and descaling comprises the following components in parts by weight: 0.2-0.6 part of anti-swelling agent, 0.013-0.021 part of anti-scaling agent, 0.004-0.005 part of methylated mono-macrocyclic polyamine, 0.01-0.02 part of descaling agent agent, 0.15-0.4 parts of dispersant, and the balance of water. In this application, the cations generated by the dissociation of the anti-swelling agent are neutralized with the negative charge on the surface of the clay, reducing the electrostatic repulsion of the clay and inhibiting the expansion of the clay; the anti-swelling agent can directly convert calcium sulfate or calcium carbonate into water-soluble substances, avoiding the combination of scale-forming ions; dissolving calcium carbonate scale or calcium sulfate scale by methylated mono-macrocyclic polyamine; dispersing the above components uniformly by dispersing agent. The scale inhibitor and descaling agent provided by the application has good descaling effect, high descaling rate, short descaling time and low corrosion rate to equipment.

Description

Technical field [0001] This application involves the field of oilfield mining, which specializes in a stool -resistant and preparation method. Background technique [0002] At present, major oil fields have entered the middle and late development stage, and the problem of stain corrosion of oil and water wells is becoming more and more serious. Repairing is basically the density of 1.30-1.40g / cm after long-term stress 3 The liquid calcium pressure well liquid, liquid calcium pressure well fluid has the problem of unsatisfactory and scaling with the strata. As a result, it often causes strata damage. Therefore, it is necessary to deal with dirt and removal agent. [0003] Dirt -resistant agents provided by related technologies include: hydrochloric acid, sodium acetate, sodium citrate, sodium fluoride, rosin polyoxide, pouring powder, sodium sodium sodium sodium sulfate sulfate, solid meta Pinerine and water. [0004] The applicant finds that there are at least the following probl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/52C09K8/528
CPCC09K8/52C09K8/528C09K2208/12
Inventor 董军辉建超樊松林廖兴松田木国李国鹏姬虎军张传干周新海韩芳
Owner PETROCHINA CO LTD
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