A kind of tackifier for oil-based drilling fluid

A technology of oil-based drilling fluid and viscosifier, which is applied in drilling compositions, chemical instruments and methods to achieve the effects of high viscosity, low filtration vector and moderate dynamic shear force.

Active Publication Date: 2018-04-24
保定市三拓化工产品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are a variety of oil-based drilling fluids in the prior art, there is still room for improvement in terms of viscosity and dynamic shear force indicators

Method used

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  • A kind of tackifier for oil-based drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 Preparation of Viscosifier for Oil-based Drilling Fluid

[0016] The preparation method is as follows: pass bentonite through a 200-mesh sieve to make the particle size ≤ 75 μm; then add 850 kg of bentonite powder and 150 kg of modifier into the mixing tank and stir evenly, then sprinkle 50 kg of white oil evenly into the mixing tank, that is, Get the finished product.

[0017] The bentonite is sodium bentonite.

[0018] The modifying agent is stearyl amidopropyl trimethyl ammonium chloride.

[0019] The oil-based drilling fluid viscosifier prepared by the above method is added to the base slurry to make drilling fluid (4% addition), and the performance index of the drilling fluid is as shown in Table 1. As can be seen from Table 1, the viscosifier of the present invention , can significantly improve the apparent viscosity, plastic viscosity, dynamic shear force.

[0020]

Embodiment 2

[0021] Example 2 Preparation of Viscosifier for Oil-based Drilling Fluid

[0022] The preparation method is as follows: pass bentonite through a 200-mesh sieve to make the particle size ≤ 75 μm; then add 800 kg of bentonite powder and 170 kg of modifier into the mixing tank and stir evenly, then sprinkle 55 kg of white oil evenly into the mixing tank, that is, Get the finished product.

[0023] The bentonite is sodium bentonite.

[0024] The modifier is cetyl amidopropyl dimethyl dodecyl ammonium chloride.

Embodiment 3

[0025] Example 3 Preparation of Viscosifier for Oil-based Drilling Fluid

[0026] The preparation method is as follows: pass bentonite through a 200-mesh sieve to make the particle size ≤ 75 μm; then add 900 kg of bentonite powder and 130 kg of modifier into the mixing tank and stir evenly, then sprinkle 45 kg of white oil evenly into the mixing tank, that is, Get the finished product.

[0027] The bentonite is sodium bentonite.

[0028] The modifier is stearyl amidopropyl dimethyl dodecyl ammonium chloride.

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Abstract

The invention discloses a tackifier for an oil-based drilling fluid. The tackifier is prepared from the following raw materials in parts by weight: 800-900 parts of bentonite, 130-170 parts of a modifier and 45-55 parts of white oil. The modifier is selected from cetyl amido propyl dimethyl dodecyl ammonium chloride, cetyl amido propyl dimethyl tetradecyl ammonium bromide, stearyl amido propyl dimethyl dodecyl ammonium chloride and the like. The preparation method comprises the following steps: allowing bentonite to pass a 200-mesh sieve, mixing the processed bentonite with the modifier, adding white oil, and uniformly mixing to obtain the tackifier. The tackifier is used in the oil-based drilling fluid; after the tackifier is added into the drilling fluid, the apparent viscosity, the plastic viscosity, the dynamic shear force and the like can be controlled; after the tackifier is added, the drilling fluid is high in viscosity, moderate in dynamic shear force and low in filtering vector, facilitates the stability of a well wall, and meanwhile, is resistant to high temperature, calcium, magnesium and salt.

Description

technical field [0001] The invention relates to a viscosifier for oil-based drilling fluid. Background technique [0002] Oil-based drilling fluid refers to the drilling fluid with oil as the continuous phase. Compared with water-based drilling fluids, oil-based drilling fluids have many advantages such as high temperature resistance, salt and calcium intrusion resistance, wellbore stability, good lubricity, and less damage to oil and gas layers. Viscosity and dynamic shear index are important rheological parameters to evaluate the quality of oil-based drilling fluid. Although there are a variety of oil-based drilling fluids in the prior art, there is still room for improvement in terms of viscosity and dynamic shear force indicators. [0003] Bentonite is a non-metallic mineral with montmorillonite as the main mineral component. It is a 2:1 crystal structure material composed of two silicon-oxygen tetrahedral wafers sandwiching an aluminum-oxygen octahedral wafer. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03C09K8/32C09K8/502
CPCC09K8/03C09K8/32C09K8/502
Inventor 周永
Owner 保定市三拓化工产品有限公司
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