Amphiphilic bottle brush type polymer as well as preparation method and application thereof

A bottle-brush type, amphiphilic technology, applied in the field of petroleum drilling fluid, to achieve the effect of simple process, mild reaction conditions, and expanded industrialization

Active Publication Date: 2020-10-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, large-scale recombinant manufacture of lubricin protein remains challenging due to the multiple amino acid repeats in the protein core structure of lubrin and its high degree of glycosylation

Method used

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  • Amphiphilic bottle brush type polymer as well as preparation method and application thereof
  • Amphiphilic bottle brush type polymer as well as preparation method and application thereof
  • Amphiphilic bottle brush type polymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Add 2 g of polyvinyl alcohol (PVA, weight average molecular weight 50,000) and 30 mL of N,N-dimethylacetamide (DMA) into the flask, and slowly raise the temperature to 60° C. to dissolve the PVA. After the PVA solution was cooled to room temperature, 11.25 g of isocyanate-terminated polyphenylene ether (PPO-NCO, weight average molecular weight 5000) was added thereto and mixed uniformly. The reaction was incubated at 60° C. for 3 h to obtain a PVA-g-PPO solution. Then, 68 g of isocyanate-terminated polyethylene glycol (PEG-NCO, weight average molecular weight 5000) was added to the PVA-g-PPO solution, and the reaction was incubated for 2 hours to obtain a solution of the product PVA-g-(PPO-co-PEG). The product solution was vacuum-dried at 80°C and pulverized to obtain a powdered bottle-brush polymer PVA 50000 -g-(PPO 5000 -co-PEG 5000 ). According to the feed ratio of reactants, the grafting degree of PPO is 5%, and the grafting degree of PEG is 30%.

[0076] Add 10...

Embodiment 2

[0078] The only difference with Example 1 is that 2g polyvinyl alcohol (PVA, weight-average molecular weight 100,000) is added to the flask to obtain powdered bottle brush type polymer PVA 100000 -g-(PPO 5000 -co-PEG 5000), the resulting lubricant product is A2.

Embodiment 3

[0080] The only difference from Example 1 is that after the PVA solution is cooled to room temperature, 6.82 g of isocyanate-terminated polyphenylene ether (PPO-NCO, weight average molecular weight 3000) is added thereto and mixed uniformly to obtain a powdered bottle brush type polymer PVA 50000 -g-(PPO 3000 -co-PEG 5000 ), the resulting lubricant product is A3.

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Abstract

The invention relates to an amphiphilic bottle brush type polymer, a preparation method of the amphiphilic bottle brush type polymer, a drilling fluid additive and application of the drilling fluid additive. The amphiphilic bottle brush type polymer comprises a polyvinyl alcohol main chain, a polyphenyl ether side chain brush section and a polyethylene glycol side chain brush section. The drillingfluid additive comprises the amphiphilic bottle brush type polymer, carboxymethyl chitosan, long-chain fatty alcohol and water. The drilling fluid additive can remarkably reduce the friction coefficient of the water-based drilling fluid, even can reduce the friction coefficient to a super-lubricating range below 0.03, and has a relatively good application prospect.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling fluids, and in particular relates to an amphiphilic bottle brush polymer and a preparation method of the amphiphilic bottle brush polymer. In addition, the present invention also relates to an additive for drilling fluid containing the amphiphilic bottlebrush polymer and its application. Background technique [0002] Lubricant is an important additive of drilling fluid. Its function is to reduce the frictional resistance between the drilling tool and the well wall as well as between the drilling tool and the metal casing, prevent the mud pack bit, and then increase the drilling speed, prevent drill sticking, and slow down the wear of the drilling tool. the goal of. Drilling fluid lubricants in the prior art are mainly divided into two categories: solid lubricants and liquid lubricants. Solid lubricants mainly include spherical particles such as synthetic polymer balls, glass balls, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C09K8/035
CPCC08G81/025C09K8/035C09K2208/34
Inventor 金军斌宣扬林永学钱晓琳董晓强王海波陈铖
Owner CHINA PETROLEUM & CHEM CORP
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