Polyhydroxy-structure emulsifier and oil-base drilling fluid containing same

An emulsifier and polyhydric technology, which is applied in the field of oil-based drilling fluid and polyhydric structural emulsifiers, can solve the problems of limited high temperature resistance of emulsifiers, no technical advantages, high addition amount, etc., and achieve good fluidity and good electrical stability and system stability, good chemical stability and heat resistance

Active Publication Date: 2013-04-03
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF6 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high temperature resistance of the above emulsifiers is limited. Although the addition amount is high during use, the effect is not good, and there is no technical advantage.

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
  • Polyhydroxy-structure emulsifier and oil-base drilling fluid containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The emulsifier of the present invention and the drilling fluid containing the emulsifier will be described in detail below in conjunction with the examples.

[0023] Emulsifier of the present invention has following chemical structural formula:

[0024] R 1 -(CH 2 -CH 2 ) n -C(OH)-(CH 2 ) m -C(O)-OCH 2 -CH(O-C(O)-R 2 )-CH 2 O-C(O)-(CH 2 ) m -CH(OH)R 3

[0025] where R 1 , R 3 for C 15 ~C 21 alkanes or monoalkenes, R 2 for hydrogen or C 12 ~C 22 Alkanes, mono-olefins or di-olefins, n value is 1-3, m value is 1-4.

[0026] The above-mentioned emulsifier is an oxidatively polymerized fatty acid ester, which is liquid at room temperature and does not need to add a solvent. Its hydroxyl value is 50-87, and its acid value is 5-50. The fatty acid used is derived from one of coconut oil, cottonseed oil, castor oil, rapeseed oil, soybean oil, palm oil, peanut oil or tall oil, or any two or more of them in any ratio mixture.

[0027] Use vegetable oil and ai...

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
hydroxyl valueaaaaaaaaaa
acid valueaaaaaaaaaa
densityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a polyhydroxy-structure emulsifier and an oil-base drilling fluid containing the same. The drilling fluid comprises 60-90 wt% of base oil and 10-40 wt% of brine, and also comprises 0.5-1.2% of emulsifier, 0.5-0.8% of reverse wetting agent, 2.0-3.0% of calcium oxide, 1.5-2.5% of organic soil, and 2.0-3.0% of fluid loss agent and weighting material on the basis of the total weight of the base oil and brine, wherein the density of the drilling fluid reaches 1.1-2.3g/cm<3> after adding the weighting material. The emulsifier has excellent reversed emulsifying property and lubricating property, can be used for a long time under the conditions of wide oil-water ratio range (60:40-95:5) and wide temperature range (150-220 DEG C), and has high emulsifying stability and high-temperature stability. The drilling fluid has favorable electrical stability and system stability in the high-water-content oil state, and has favorable flowability in the high density state.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a polyhydroxy structure emulsifier and an oil-based drilling fluid containing the emulsifier. Background technique [0002] As a key component of oil-based drilling fluid system, emulsifier plays a vital role. The stability of oil-based drilling fluid depends to a large extent on the rational use of emulsifiers. The main function of emulsifier is to reduce the interfacial tension between oil and water, form a strong interfacial film and increase the viscosity of the external phase. For now, the emulsifiers used in oil-based drilling fluid systems are generally: soap salts of carboxylic acids, soap salts of sulfonic acids, organic acid esters, amine salts, etc. The high temperature resistance of the above emulsifiers is limited. Although the addition amount is high during use, the effect is not good, and there is no technical advantage. Contents of the invention [0003] The...

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): C09K8/035C09K8/32
Inventor 卢福伟张松杰黄达全王伟忠郭剑梅马运庆龚纯武马翠雪田增艳
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