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Coating agent multi-component copolymer for drilling fluid

A technology of multi-component copolymer and coating agent, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of temperature resistance, poor salt resistance, no guidance scheme, complicated production process, etc. Achieving the effect of good coating, wide application and good performance

Active Publication Date: 2020-11-03
石家庄华莱鼎盛科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of the above technologies have complicated production process and high cost
And the temperature resistance and salt resistance are poor, and the scope of application is narrow
[0004] The above technologies have not given specific guidance on how to use coating agents for drilling fluids to fully inhibit well wall collapse, improve cuttings coating effects, avoid complex drilling accidents, and improve drilling quality and efficiency.

Method used

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  • Coating agent multi-component copolymer for drilling fluid
  • Coating agent multi-component copolymer for drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the coating agent polypolymer for drilling fluid of the present invention is made of the following raw materials in parts by mass: 110 parts of clear water, 0.6 part of sucrose i.e. brown sugar, 17 parts of acrylamide, N, N- 5 parts of dimethylacrylamide, 0.4 parts of 4-vinylguaiacol, 12 parts of allyltrimethylammonium chloride, 1.5 parts of chelating agent, 0.1 part of initiator, shale inhibitor namely polyhydroxypropyl 12 parts of dimethyl ammonium chloride, 25 parts of tackifier; the above-mentioned initiator is the combination of potassium permanganate and potassium vanadate, the mass ratio of potassium permanganate and potassium vanadate is 1:2 The above-mentioned chelating agent is selected from the combination of EDTA and lactic acid two raw materials, and the mass ratio of EDTA and lactic acid is 2:1; the above-mentioned tackifier is xanthan gum, hydroxypropyl guar gum HPG, hydroxypropyl squash The combination of three raw materials of HPTQ, the ma...

Embodiment 2

[0019] Embodiment 2: the coating agent polypolymer for drilling fluid of the present invention is made of the following raw materials in parts by mass: 120 parts of clear water, 0.5 part of sucrose or white sugar, 15 parts of acrylamide, N, N- 7 parts of dimethylacrylamide, 0.2 parts of 4-vinylguaiacol, 15 parts of allyltrimethylammonium chloride, 1.5 parts of chelating agent, 0.05 parts of initiator, shale inhibitor namely polyhydroxypropyl 10 parts in dimethylammonium chloride, 20 parts in tackifier; Above-mentioned initiator is potassium permanganate; Above-mentioned chelating agent selects the combination of EDTA and citric acid two kinds of raw materials for use, and the mass ratio of EDTA and citric acid is 1 : 1; the above-mentioned tackifier is a combination of xanthan gum and hydroxypropyl guar gum HPG, and the mass ratio of xanthan gum and hydroxypropyl guar gum HPG is 2:1.

[0020] The preparation method of the multi-component copolymer of coating agent for drilling...

Embodiment 3

[0021] Embodiment 3: the coating agent polypolymer for drilling fluid of the present invention is made of the following raw materials in parts by mass: 130 parts of clear water, 0.7 part of sucrose i.e. brown sugar, 20 parts of acrylamide, N, N- 6 parts of dimethylacrylamide, 0.5 part of 4-vinylguaiacol, 15 parts of allyltrimethylammonium chloride, 2.5 parts of chelating agent, 0.15 part of initiator, shale inhibitor namely polyhydroxypropyl 15 parts of dimethyl ammonium chloride, 30 parts of tackifier; the above initiator is the combination of potassium permanganate and potassium vanadate, the mass ratio of potassium permanganate and potassium vanadate is 1:1 The above-mentioned chelating agent is selected from the combination of EDTA, citric acid and lactic acid three kinds of raw materials, and the mass ratio of EDTA, citric acid and lactic acid is 2:1:1; the above-mentioned tackifier is xanthan gum and hydroxypropyl squash The combination of two raw materials of HPTQ, the ...

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Abstract

The invention discloses a coating agent multipolymer for a drilling fluid. The coating agent multipolymer is prepared from the following raw materials: 110 to 130 parts of clear water, 0.5 to 0.7 parts of sucrose, 15 to 20 parts of acrylamide, 5 to 8 parts of N, N-dimethylacrylamide, 0.2 to 0.5 parts of 4-vinyl guaiacol, 10 to 15 parts of allyltrimethylammonium chloride, 1 to 3 parts of a chelating agent, 0.05 to 0.15 parts of an initiator, 10 to 15 parts of a shale inhibitor and 20 to 30 parts of a tackifier. The initiator is one or two of potassium permanganate and potassium vanadate, the chelating agent is one or more of EDTA, citric acid and lactic acid, the shale inhibitor is a dimethylamine-epichlorohydrin copolymer, and the tackifier is one or more of xanthan gum, hydroxypropyl guargum HPG and hydroxypropyl sesbania HPTQ. The coating agent provided by the invention has good performance, can inhibit well wall collapse, improves the rock debris coating effect, effectively avoidsor reduces the occurrence of complex drilling accidents, and improves the drilling quality and efficiency.

Description

technical field [0001] The invention relates to a petroleum drilling fluid additive, in particular to a coating agent multi-polymer for drilling fluid. The invention also relates to a preparation method of the coating agent multi-component copolymer for drilling fluid. Background technique [0002] Drilling fluid is an important fluid in drilling engineering, and its performance is directly related to the quality of drilling, and plays a crucial role in the oil recovery efficiency of an oil field. At present, there are many kinds of coating agents on the market, but their performances all have certain deficiencies, and it is difficult to effectively coat and suppress them. Especially in high-temperature and high-salt conditions, it is difficult to effectively control the water-absorbing expansion and dispersion of underground mudstone and shale, and the collapse of blocks. Guarantee the efficient performance of drilling fluid. [0003] The inventor retrieved the following ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C08F220/56C08F220/54C08F226/02C08F212/14
CPCC08F220/56C09K8/035C09K2208/12C08F220/54C08F226/02C08F212/14
Inventor 陈利赵秀平郑雄曹娇
Owner 石家庄华莱鼎盛科技有限公司