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Modified bentonite for seawater drilling and preparation method thereof, and drilling fluid

A bentonite and modified technology, applied in chemical instruments and methods, drilling compositions, inorganic chemistry, etc., can solve problems such as no emulsification performance, insufficient gelling effect, and unsatisfactory stability, and achieve pulping Fast, increase stability, promote gelling effect

Pending Publication Date: 2020-12-01
WUHU FEISHANG NONMETAL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although these modified bentonites have certain stability, most of them are aimed at increasing the viscosity of organic clays in solvents. Most organic bentonites do not have emulsifying properties, and emulsifiers need to be added to improve their stability. Although emulsifying Bentonite can improve the viscosity of drilling fluid, but the gelling effect is not enough, and its stability is still not ideal, and bentonite with higher stability for seawater drilling needs to be developed urgently

Method used

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  • Modified bentonite for seawater drilling and preparation method thereof, and drilling fluid
  • Modified bentonite for seawater drilling and preparation method thereof, and drilling fluid
  • Modified bentonite for seawater drilling and preparation method thereof, and drilling fluid

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Effect test

Embodiment 1

[0016] Embodiment 1: Preparation of modified bentonite for seawater drilling

[0017] The modified bentonite for seawater drilling includes the following components: bentonite, sepiolite, palygorskite, kaolinite, illite, chlorite, opal, calcite, siderite, talcum powder, gypsum, pyrite , Hornblende, quartz, nano-iron oxide particles, nano-silica particles, nano-graphite.

[0018] The parts by weight of each component of bentonite for above-mentioned modified seawater drilling can be as follows: bentonite 5%, sepiolite 1.5%, palygorskite 0.5%, kaolinite 0.3%, illite 0.2%, chlorite 0.15%, Opal 0.1%, Calcite 0.09%, Siderite 0.05%, Talc 0.03%, Gypsum 0.02%, Pyrite 0.02%, Hornblende 0.01%, Quartz 0.015%, Nano Iron Oxide Particles 0.2%, Nano Silica Particles 0.1%, nano-graphite 0.03%.

[0019]The preparation method of the above modified bentonite for seawater drilling includes the following steps: (1). Purify the bentonite by precipitation to remove impurities such as gravel, vigor...

Embodiment 2

[0020] Embodiment 2: Preparation of modified bentonite for seawater drilling

[0021] The modified bentonite for seawater drilling includes the following components: bentonite, sepiolite, palygorskite, kaolinite, illite, chlorite, opal, calcite, siderite, talcum powder, gypsum, pyrite , Hornblende, quartz, nano-iron oxide particles, nano-silica particles, nano-graphite.

[0022] The parts by weight of each component of bentonite for above-mentioned modified seawater drilling can be as follows: bentonite 8%, sepiolite 1.8%, palygorskite 0.8%, kaolinite 0.4%, illite 0.3%, chlorite 0.18%, Opal 0.15%, Calcite 0.1%, Siderite 0.06%, Talc 0.04%, Gypsum 0.03%, Pyrite 0.025%, Hornblende 0.02%, Quartz 0.02%, Nano Iron Oxide Particles 0.35%, Nano Silica Particles 0.2%, nano-graphite 0.035%.

[0023] The preparation method of the above modified bentonite for seawater drilling includes the following steps: (1). Purify the bentonite by precipitation to remove impurities such as gravel, vi...

Embodiment 3

[0024] Embodiment 3: Preparation of modified bentonite for seawater drilling

[0025] The modified bentonite for seawater drilling includes the following components: bentonite, sepiolite, palygorskite, kaolinite, illite, chlorite, opal, calcite, siderite, talcum powder, gypsum, pyrite , Hornblende, quartz, nano-iron oxide particles, nano-silica particles, nano-graphite.

[0026] The parts by weight of each component of the above-mentioned modified seawater drilling bentonite can be as follows: 10% of bentonite, 2% of sepiolite, 1% of palygorskite, 0.5% of kaolinite, 0.4% of illite, 0.2% of chlorite, Opal 0.2%, Calcite 0.12%, Siderite 0.08%, Talc 0.05%, Gypsum 0.04%, Pyrite 0.03%, Hornblende 0.03%, Quartz 0.03%, Nano Iron Oxide Particles 0.5%, Nano Silica Granules 0.3%, Nanographite 0.05%.

[0027] The preparation method of the above modified bentonite for seawater drilling includes the following steps: (1). Purify the bentonite by precipitation to remove impurities such as g...

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Abstract

The invention provides modified bentonite for seawater drilling and a preparation method thereof, and a drilling fluid. The modified bentonite for seawater drilling comprises the following components:bentonite, sepiolite, palygorskite, kaolinite, illite, chlorite, opal, calcite, siderite, talcum powder, gypsum, pyrite, hornblende, quartz, nanometer iron oxide particles, nanometer silicon dioxideparticles and nanometer graphite. The bentonite prepared from the components is high in slurrying speed, low in sand content, good in slurry making rate, high in sand carrying capacity, low in filterloss and high in stability.

Description

technical field [0001] The invention relates to the field of bentonite, in particular to a modified bentonite for seawater drilling, a preparation method and drilling fluid. Background technique [0002] Bentonite is a non-metallic mineral with montmorillonite as the main mineral component. The montmorillonite structure is a 2:1 crystal structure composed of two silicon-oxygen tetrahedra sandwiching a layer of aluminum-oxygen octahedron. Due to the formation of montmorillonite unit cells There are some cations in the layered structure, such as Cu, Mg, Na, K, etc., and the interaction between these cations and the montmorillonite unit cell is very unstable, and they are easily exchanged by other cations, so they have good ion exchange properties. Due to its specific layered structure, it has a large specific surface area, so it has strong adsorption. At the same time, due to the existence of hydrophilic group OH, it has excellent dispersion, suspension and bonding in aqueous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/14C09K8/16C09K8/24C01B33/40
CPCC09K8/145C09K8/16C09K8/24C01B33/40C09K2208/10
Inventor 方吸云张平武梁春杨必富
Owner WUHU FEISHANG NONMETAL MATERIAL
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