Diluent for oil-based drilling fluid, preparation method and application thereof

A technology of oil-based drilling fluid and water-in-oil drilling fluid, which is applied in the field of drilling, can solve problems such as downhole salt invasion, poor quality solid phase, difficulty in drilling construction, and instability of treatment agents, so as to reduce the occurrence of downhole complex situations and achieve good performance. , the effect of reducing the apparent viscosity

Active Publication Date: 2016-09-21
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For oil-based drilling fluids with strong inhibitory ability, the reasons for the thickening of the drilling fluid are mainly due to: the aggravation of the drilling fluid, the instability of the treatment agent due to the high bottom hole temperature, the downhole salt invasion and the invasion of inferior solids, etc. ; After a series of investigations, we found that high-density drilling fluid may be needed when drilling wells or deep wells, but at the same time the drilling fluid is required to have good rheology, which will bring great difficulties to drilling construction

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Diluent for oil-based drilling fluid, preparation method and application thereof
  • Diluent for oil-based drilling fluid, preparation method and application thereof
  • Diluent for oil-based drilling fluid, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a diluent for oil-based drilling fluid, and the raw material components for preparing the diluent include:

[0033]

[0034] This embodiment also provides the preparation method of above-mentioned diluent, and this preparation method comprises the following steps:

[0035] (1) The oleic acid of weighing 90g, the diethanolamine of 42g, the potassium hydroxide of 1g join in the there-necked flask, stir while vacuumizing under the condition that vacuum degree is 0.02-0.06, rotating speed is 3000r / min, gradually warming up to 150°C, after 2-4 hours of reaction, stop vacuuming and stirring, and keep warm for 1.5-2 hours to obtain amides;

[0036] (2) Add 16.9 g of dodecylbenzenesulfonic acid into the three-necked flask of the above-mentioned amide compound, continue to vacuumize and stir the reaction for 2 hours at 150 ° C, and the rotation speed is 3000 r / min, and the reaction is terminated to obtain oil-based drilling fluid diluent.

[0037] T...

Embodiment 2

[0039] This embodiment provides a diluent for oil-based drilling fluid, and the raw material components for preparing the diluent include:

[0040]

[0041] This embodiment also provides the preparation method of above-mentioned diluent, and this preparation method comprises the following steps:

[0042] (1) The oleic acid of weighing 202g, the diethanolamine of 42g, the potassium hydroxide of 1g join in the there-necked flask, stir while vacuumizing under the condition that vacuum degree is 0.02-0.06, the rotating speed is 4000r / min, gradually warming up to 150°C, after 2-4 hours of reaction, stop vacuuming and stirring, and keep warm for 1.5-2 hours to obtain amides;

[0043] (2) Add 16.9 g of dodecylbenzenesulfonic acid into the three-necked flask of the above-mentioned amide compound, continue to vacuumize and stir the reaction for 4 hours at 150 ° C, and the rotation speed is 4000 r / min, and the reaction is terminated to obtain oil-based drilling fluid diluent.

[00...

Embodiment 3

[0046] This embodiment provides a diluent for oil-based drilling fluid, and the raw material components for preparing the diluent include:

[0047]

[0048] This embodiment also provides the preparation method of above-mentioned diluent, and this preparation method comprises the following steps:

[0049] (1) The oleic acid of weighing 202g, the diethanolamine of 42g, the potassium hydroxide of 1g join in the there-necked flask, stir while vacuumizing under the condition that vacuum is 0.02-0.06, the rotating speed is 3000r / min, gradually warming up to 150°C, after 2-4 hours of reaction, stop vacuuming and stirring, and keep warm for 1.5-2 hours to obtain amides;

[0050] (2) Add 23.35 g of dodecylbenzenesulfonic acid into the three-necked flask of the above-mentioned amide compound, continue to vacuumize and stir the reaction for 5 hours at 160 ° C, and the rotation speed is 3000 r / min, and the reaction is terminated to obtain oil-based drilling fluid diluent.

[0051]Thi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
Login to view more

Abstract

The invention provides a diluent for oil-based drilling fluid and a preparation method thereof. The raw materials for preparation of the diluent consist of: 80-210 parts by weight of fatty acid, 30-50 parts by weight of diethanolamine, 1-5 parts by weight of potassium hydroxide and 15-45 parts by weight of dodecyl benzenesulfonic acid. The diluent for oil-based drilling fluid provided by the invention can have good compatibility with the oil base, and accordingly can be well dispersed in oil-based drilling fluid so as to reduce the viscosity of the oil-based drilling fluid, and under a high temperature condition, the diluent also has good performance. The invention also provides application of the diluent in high density oil-based drilling fluid. The diluent can effectively reduce the apparent viscosity, plastic viscosity and yield value of drilling fluid in high density oil-based drilling fluid base slurry, thereby better realizing reuse of oil-based drilling fluid, and reducing the use cost of oil-based drilling fluid.

Description

technical field [0001] The invention belongs to the technical field of drilling, and in particular relates to a diluent for oil-based drilling fluid, a preparation method thereof, and an application of the diluent in high-density oil-based drilling fluid. Background technique [0002] With the development of the petroleum industry, the drilling is getting deeper and the bottom hole temperature is getting higher and higher, so the pressure of the drilled formation is also increasing. At this time, it is necessary to use a heavier drilling fluid to control the formation pressure. Barite is currently the most commonly used weighting material, which has a certain thickening effect on the drilling fluid system, especially when the drilling fluid density is 2.2g / cm 3 When above, the viscosity of the drilling fluid will increase, the shear force will increase, and the thixotropy will deteriorate, which will easily cause pressure surges and complex downhole accidents. And when dril...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/32C09K8/36
CPCC09K8/32C09K8/36
Inventor 王建华王立辉杨海军闫丽丽张延丽李爽杨峥郑建龙王发云孙明昊纪托黄丹超可点史赫李龙
Owner BC P INC CHINA NAT PETROLEUM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap