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Flocculating agent for oil-based drilling fluid and preparation method of flocculating agent

An oil-based drilling fluid and flocculant technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of limited equipment design and production, and achieve the effect of reducing viscosity and strong netting ability

Pending Publication Date: 2021-12-10
北京中科日升科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited to the design and production of equipment, the existing three-stage solid control equipment can only remove useless solid phases larger than 10 μm, and low-density solid phases smaller than 10 μm have to stay in the drilling fluid

Method used

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  • Flocculating agent for oil-based drilling fluid and preparation method of flocculating agent
  • Flocculating agent for oil-based drilling fluid and preparation method of flocculating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a flocculant for oil-based drilling fluid. The raw materials for its preparation include: 60 kg of acrylamide aqueous solution (98%, Sinopharm Chemical Reagent Co., Ltd.), quaternary ammonium salt cationic monomer (diallyl dimethyl Ammonium chloride (DMDAAC, Shandong Kepler) 15kg, sodium acrylate (99.9%, Shandong Kepler) 5kg, sodium ethylenediaminetetraacetate (EDTA-2Na, Sinopharm Chemical Reagent Co., Ltd.) 0.5kg, urea (Sinopharm Group Chemical Reagent Co., Ltd.) 0.1kg, surfactant 1 (Span-80, Hebei Runbu) 10kg, surfactant 2 (OP-10, Jinan Huijinchuan Chemical Industry) 2kg, initiator (azobis Isobutyronitrile, Sinopharm Chemical Reagent Co., Ltd.) 0.05kg, solvent (5# white oil, Maoming Petrochemical) 40kg.

[0034] Mix 60 kg of acrylamide aqueous solution and 15 kg of quaternary ammonium cationic monomers evenly, add 5 kg of sodium acrylate, 0.5 kg of sodium ethylenediamine tetraacetate and 0.1 kg of urea under cooling conditions, and keep stirri...

Embodiment 2

[0036]This example provides a flocculant for oil-based drilling fluid, the raw materials for its preparation include: 55 kg of acrylamide aqueous solution (98%, Sinopharm Chemical Reagent Co., Ltd.), quaternary ammonium salt cationic monomer (acryloyloxyethyl tris Methylammonium chloride (DAC, Kepler, Shandong) 15kg, sodium acrylate (99.9%, Kepler, Shandong) 5kg, sodium ethylenediaminetetraacetate (EDTA-2Na, Sinopharm Chemical Reagent Co., Ltd.) 0.3kg, Urea (Sinopharm Chemical Reagent Co., Ltd.) 0.1kg, surfactant 1 (Span-80, Hebei Runbu) 10kg, surfactant 2 (sodium α-olefin sulfonate (AOS), BOSF) 5kg, initiator 1 (potassium persulfate, Sinopharm Chemical Reagent Co., Ltd.) 0.06kg, initiator 2 (sodium bisulfite, Sinopharm Chemical Reagent Co., Ltd.) 0.04kg, solvent (5# white oil, Maoming Petrochemical) 50kg.

[0037] Mix 55 kg of acrylamide aqueous solution and 15 kg of quaternary ammonium cationic monomers evenly, add 5 kg of sodium acrylate, 0.3 kg of sodium edetate and 0.1 kg...

Embodiment 3

[0039] This embodiment provides a flocculant for oil-based drilling fluid, and the raw materials for its preparation include: 60 kg of acrylamide aqueous solution (98%, Sinopharm Chemical Reagent Co., Ltd.), quaternary ammonium salt cationic monomer (N,N-dimethyl Base-N-benzyl-N-acrylamido ammonium chloride (DBAAC), Jinan Huijinchuan Chemical) 10kg, sodium acrylate (99.9%, Shandong Kepler) 2kg, sodium ethylenediaminetetraacetate (EDTA-2Na , Sinopharm Chemical Reagent Co., Ltd.) 0.5kg, urea (Sinopharm Chemical Reagent Co., Ltd.) 0.1kg, surfactant 1 (Span-80, Hebei Runbu) 12kg, surfactant 2 (hexadecyltrimethyl ammonium chloride, Sinopharm Chemical Reagent Co., Ltd.) 3kg, initiator (azobisisobutyronitrile, Sinopharm Chemical Reagent Co., Ltd.) 0.05kg, solvent (5# white oil, Maoming Petrochemical) 60kg.

[0040] Mix 60 kg of acrylamide aqueous solution and 10 kg of quaternary ammonium cationic monomers evenly, add 2 kg of sodium acrylate, 0.5 kg of sodium ethylenediamine tetraacet...

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Abstract

The invention belongs to the technical field of petrochemical engineering, and relates to a flocculating agent for oil-based drilling fluid and a preparation method of the flocculating agent. The flocculating agent is modified cationic polyacrylamide. The flocculating agent is prepared from the following raw materials in parts by weight: 40 to 60 parts of acrylamide, 5 to 15 parts of quaternary ammonium salt cationic monomer, 1 to 5 parts of sodium acrylate, 0.05 to 0.15 part of initiator, 0.1 to 0.5 part of sodium ethylene diamine tetracetate, 0.05 to 0.1 part of urea, 5 to 15 parts of surfactant and 30 to 60 parts of solvent. According to the flocculating agent for the oil-based drilling fluid and the preparation method of the flocculating agent, the flocculating agent for the oil-based drilling fluid can be better prepared, and the prepared flocculating agent for the oil-based drilling fluid can be rapidly dissolved and dispersed in an oil-based drilling fluid system and efficiently flocculates tiny solid phases in the oil-based drilling fluid.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and relates to a flocculant for oil-based drilling fluid and a preparation method thereof. Background technique [0002] As an excellent drilling fluid system, oil-based drilling fluid has anti-slump and strong inhibitory effects, which is conducive to stabilizing the well wall, effectively inhibiting water-sensitive formations, and maximally protecting oil and gas layers; and has strong anti-pollution and high-temperature resistance , good lubrication performance, good anti-seize performance, stable performance, easy maintenance, has become the main means of drilling high temperature and high pressure deep wells, highly deviated directional wells, horizontal wells and geologically complex wells. However, oil-based drilling fluid also has some disadvantages, such as high cost and serious impact on the ecological environment. In order to save costs, oil-based drilling fluids are of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F226/02C08F220/06C08F220/34C09K8/035
CPCC08F220/56C09K8/035C08F226/02C08F220/06C08F220/34
Inventor 张云雷孙中俊权换哲冯理琼李硕张仲
Owner 北京中科日升科技有限公司
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