Composite lignin-base viscosity breaker for drilling fluid and preparation method thereof

A lignin-based, drilling fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of complex production process, poor viscosity reduction effect, secondary pollution, etc. The effect of easy availability of raw materials and short production cycle

Active Publication Date: 2013-01-23
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But generally speaking, the current modified lignin-based drilling fluid viscosity reducer has disadvantages such as environmental

Method used

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  • Composite lignin-base viscosity breaker for drilling fluid and preparation method thereof
  • Composite lignin-base viscosity breaker for drilling fluid and preparation method thereof
  • Composite lignin-base viscosity breaker for drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1. The raw material components used in this embodiment are as follows (unit: kilogram):

[0048] Pulping black liquor (mixture of wheat straw, Achnatherum splendens, and eucalyptus pulping black liquor, the mass ratio is 3:2:2, and the solid content is 58%): 440 kg

[0049] Concentrated sulfuric acid (98%): 10.3 kg

[0050] Hydrogen peroxide (30%): 6.0 kg

[0051] Formaldehyde (37%): 22.4 kg

[0052] Sodium sulfite: 41.1 kg

[0053] 7 water ferrous sulfate: 35.2 kg

[0054] Potassium permanganate: 7.3 kg

[0055] Concentrated hydrochloric acid (36%-40%): 73.4 kg

[0056] Tributyl phosphate: 0.1 kg

[0057] Sodium tripolyphosphate: 5.9 kg

[0058] Water: 358.2

[0059] 2. Preparation process steps and parameters:

[0060] (1) Sulfonation reaction: first add 440 kg of pulping black liquor with a solid content of 45% to the reactor, and mix 10.3 kg of concentrated sulfuric acid with a content of 98% and 41.1 kg of water to form a sulfuric acid solution with a cont...

Embodiment 2

[0064] 1. The raw material components used in this embodiment are as follows (unit: kilogram):

[0065] Pulping black liquor (straw, birch, masson pine kraft black liquor mixture, mass ratio 3:2:1, solid content 58%): 360 kg

[0066] Concentrated sulfuric acid (98%): 13.2 kg

[0067] Hydrogen peroxide (30%): 12 kg

[0068] Formaldehyde (37%): 26.4 kg

[0069] Sodium bisulfite: 38.4 kg

[0070] 4 water ferrous chloride: 36 kg

[0071] Potassium permanganate: 9.6 kg

[0072] Concentrated hydrochloric acid (36%-40%): 102 kg

[0073] TSA-672 high-efficiency silicone foam suppressor: 1.4 kg

[0074] Sodium phosphate: 7.2 kg

[0075] Water: 393.7

[0076] 2. Preparation process steps and parameters:

[0077] (1) Sulfonation reaction: first add 360 kg of pulping black liquor with a solid content of 58% into the reactor, and mix 13.2 kg of concentrated sulfuric acid with a content of 98% and 52.8 kg of water to form a sulfuric acid solution with a content of 19.6% Then add i...

Embodiment 3

[0081] 1. The raw material components used in this embodiment are as follows (unit: kilogram):

[0082] Pulping black liquor (mixture of bamboo, bagasse, and awn stem pulping black liquor, the mass ratio is 7:2:1, and the solid content is 60%): 283 kg

[0083] Concentrated sulfuric acid (98%): 4.7 kg

[0084] Hydrogen peroxide (30%): 14.5 kg

[0085] Formaldehyde (37%): 24.9 kg

[0086] Sodium metabisulfite: 54.8 kg

[0087] Ferrous salt: (mixture of ferrous sulfate 7 hydrates / ferrous chloride 4 hydrates, mass ratio 1:1) 37.8 kg

[0088] Manganese dioxide: 3.8 kg

[0089] Concentrated hydrochloric acid (36%-40%): 96.4 kg

[0090] SPG-303 paper pulping special defoamer: 1.9 kg

[0091] Sodium hexametaphosphate: 47.3 kg

[0092] Water: 431 kg

[0093] 2. Preparation process steps and parameters:

[0094] (1) Sulfonation reaction: first add 283 kg of pulping black liquor with a solid content of 60% into the reactor, and then mix 5 kg of concentrated sulfuric acid with a ...

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Abstract

The invention discloses a composite lignin-base viscosity breaker for a drilling fluid and a preparation method thereof. The preparation method comprises the following steps: (1) carrying out sulfonation reaction to obtain lignosulfonate; (2) preparing ferrimanganic salt; and (3) preparing ferrimanganic lignosulfonate. In the composite lignin-base viscosity breaker for a drilling fluid, the water-insoluble substance content is at most 0.5%, the calcium sulfate content is at most 1.0%, the iron content is 3-5%, the complexation degree is at least 75%, and the relative molecular weight Mn is 5000-20000. The method has the advantage of low production cost; and the prepared viscosity breaker can display favorable viscosity breaking effect of the inorganic viscosity breaker, and also has favorable temperature resistance and salt resistance of the lignin viscosity breaker, thereby having favorable synergistic action. The preparation technique is simple and does not generate secondary pollution.

Description

technical field [0001] The invention belongs to the field of dispersants, and in particular relates to a compound type lignin-based viscosity reducer for drilling fluid and a preparation method thereof. Background technique [0002] With the development of the petroleum industry, the amount of exploration and development of oil and gas in offshore and deep formations is increasing. At present, there are more and more deep wells and ultra-deep wells in my country, and the temperature at the bottom of the well increases gradually with the increase of well depth. Complex problems such as the thickening of drilling fluid due to high temperature have become more and more prominent. Viscosity reducer is an indispensable drilling fluid treatment agent in the drilling process, and it plays a very important role in adjusting the rheological properties of drilling fluid. As early as the late 1930s, people began to use inorganic phosphates to control drilling fluid viscosity. Since ...

Claims

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Application Information

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IPC IPC(8): C09K8/035C08H7/00
Inventor 刘明华陈珍喜刘敏威吴宜锴刘志鹏
Owner FUZHOU UNIVERSITY
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