High-polymer curing resin of coating agent for drilling fluid

A technology of curing resin and coating agent, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as being unsuitable for mass production, lack of temperature-resistant and salt-resistant groups, low effective production capacity, etc. The coating has obvious inhibitory effect, excellent anti-salt and anti-calcium properties, and the effect of prolonging the operation time

CN110358511AActive Publication Date: 2019-10-22石家庄华莱鼎盛科技有限公司
11 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-10-22

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

High-polymer curing resin of a coating agent for a drilling fluid is prepared from raw materials as follows: 800-1,000 parts of clear water, 100-120 parts of vegetable gum, 0.5-1.0 part of a catalyst,0.2-0.7 parts of an initiator, 80-100 parts of 2-acryloylamino-2-methallyl sulfonate, 30-50 parts of N,N-dimethylacrylamide, 10-20 parts of 4-vinylpyridine, a pH regulator, 3-7 parts of talc powder and 2-5 parts of calcium carbonate, wherein the dosage of the pH regulator should meet the requirements for pH value of a solution after regulation; the vegetable gum is water-soluble vegetable gum; the catalyst is sulfuric acid; the initiator is one or two of an ammonium persulfate-sodium hydrogen sulfite system and a potassium persulfate-sodium hydrogen sulfite system. At the high temperature of200 DEG C, the resin has good coating inhibition performance, and the rolling recovery rate of mud shale can reach 90%; the high-polymer curing resin has good salt and calcium pollution resistance, filtrate loss reduction ability and capability of improving rheological property of the drilling fluid. A preparation process is simple, low in cost, good in environmental protection effect and wide inapplication range.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a coating agent for drilling fluid, in particular to a polymer solidified resin for the coating agent for drilling fluid, which belongs to petroleum drilling aids. The invention also relates to a preparation method of the coating agent polymer curing resin for drilling fluid. Background technique

[0002] Coating agent is a commonly used treatment agent in water-based drilling fluid. It mainly achieves the purpose of inhibiting the dispersion of cuttings by coating and adsorbing on the surface of cuttings. It also has the properties of stabilizing the well wall, regulating flow patterns and reducing water loss. At present, there are many types of coating agents on the market, but there are still problems such as unsatisfactory coating inhibition, poor temperature and salt resistance, and environmental protection standards.

[0003] The inventor retrieved the following relevant non-patent literature: The author Jiang Guancheng ...

Examples

Embodiment 1

[0018] Embodiment 1: the coating agent macromolecule solidified resin for drilling fluid of the present invention is made from the raw material of following mass parts (mass proportion): 800 parts of clear water, 100 parts of plant gums, 0.5 part of catalyzer, 0.25 parts of initiator, 80 parts of 2-acrylamido-2-methylpropanesulfonic acid, 30 parts of N,N-dimethylacrylamide, 10 parts of 4-vinylpyridine, pH regulator, the amount should meet the adjustment Requirements of the pH value of the back solution (reaction solution) (pH adjuster consumption can be 5 parts), 5 parts of talcum powders, 3 parts of calcium carbonate; Above-mentioned plant gum is water-soluble plant gum selenium gum; Catalyst is that molar concentration is 0.1mol / L sulfuric acid aqueous solution; the initiator is ammonium persulfate-sodium bisulfite system, the mass ratio of ammonium persulfate to sodium bisulfite is 3:1; the pH regulator is analytically pure sodium hydroxide.

[0019] The preparation method ...

Embodiment 2

[0020] Embodiment 2: the coating agent macromolecular solidified resin for drilling fluid of the present invention is made by the raw material of following mass fraction: 1000 parts of clear water, 110 parts of plant gums, 0.8 part of catalyst, 0.5 part of initiator, 100 parts of 2-acrylamido-2-methylpropanesulfonic acid, 40 parts of N, N-dimethylacrylamide, 15 parts of 4-vinylpyridine, pH adjuster, its consumption should satisfy the adjusted solution (reaction solution ) pH value requirement (pH adjuster consumption can be 7 parts), 7 parts of talcum powder, 5 parts of calcium carbonate; Above-mentioned plant gum is water-soluble plant gum guar gum; Catalyst is the sulfuric acid that molar concentration is 0.1mol / L aqueous solution; the initiator is a potassium persulfate-sodium bisulfite system, and the mass ratio of potassium persulfate to sodium bisulfite is 3:1; the pH regulator is analytically pure potassium hydroxide.

[0021] The preparation method of described coating...

Embodiment 3

[0022] Embodiment 3: the drilling fluid coating agent macromolecule solidified resin of the present invention is made from the raw material of following mass fraction: 1000 parts of clear water, 120 parts of plant gums, 0.9 part of catalyst, 0.7 part of initiator, 100 parts of 2-acrylamido-2-methylpropanesulfonic acid, 50 parts of N, N-dimethylacrylamide, 18 parts of 4-vinylpyridine, pH adjuster, its consumption should satisfy the adjusted solution (reaction solution ) pH value requirement (pH adjuster consumption can be 8 parts), 3 parts of talcum powder, 4 parts of calcium carbonate; Above-mentioned plant gum is water-soluble plant gum konjac gum; Catalyst is the sulfuric acid that molar concentration is 0.1mol / L aqueous solution; the initiator is a combination of ammonium persulfate-sodium bisulfite system and potassium persulfate-sodium bisulfite system, the mass ratio of the two systems is 1:1, the ratio of ammonium persulfate to sodium bisulfite The mass ratio is 3:1, th...