Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A high-temperature resistant high-density solid-phase formate-free drilling fluid system

A high-density, solid-free technology, applied in the field of oil drilling, can solve the problems of unsystematic development of solid-free drilling fluid systems, and achieve the effects of good reservoir protection performance, low friction and strong inhibition.

Active Publication Date: 2017-09-12
CHINA NAT OFFSHORE OIL CORP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there have been many domestic researches on the high-temperature and high-density drilling fluid system formed by traditional weighting materials, but the research on the solid-free drilling fluid system using organic salts as weighting materials has not been carried out systematically.

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
  • A high-temperature resistant high-density solid-phase formate-free drilling fluid system
  • A high-temperature resistant high-density solid-phase formate-free drilling fluid system
  • A high-temperature resistant high-density solid-phase formate-free drilling fluid system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 Prepare a kind of density 2.30 g / cm according to the prescription of table 1 3 High-temperature resistant high-density solid-phase formate-free drilling fluid system and its performance test.

[0023] Table 1

[0024]

[0025] 1. Indoor preparation procedure

[0026] (1) According to the formula determined above, weigh various treatment agents; each preparation amount is 4*350ml or 8*350ml;

[0027] (2) During preparation, mix potassium formate and cesium formate in a high-speed shear mixer at a speed of 1500rpm for 10 minutes, then increase the speed to 6000rpm, and slowly add viscosifiers and fluid loss additives at intervals of 5 minutes , Graphite, Potassium Carbonate, Potassium Bicarbonate, Magnesium Oxide, Seawater, and Calcium Carbonate are added within the last 3 minutes. The entire preparation process ensures that all components are added within 45 minutes and mixed uniformly to obtain the product;

[0028] (3) The temperature during mixing s...

Embodiment 2~4

[0049] Examples 2-4 Prepare different densities of high-temperature resistant high-density solid-phase formate-free drilling fluid systems according to the following formula

[0050]

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 discloses a high-temperature-resistant high-density solid-phase-free formate drilling fluid system. The drilling fluid system is prepared from the following compositions in percent by mass: 0.8-1.1% of a tackifier, 0.5-1.0% of a filtrate reducer, 1-2% of a first temporary blocking agent, 1.4-2.2% of a second temporary blocking agent, 0.4-0.9% of a buffering agent, 0.1-0.4% of an anti-oxidant, 45-87% of a weighting agent, and the balance seawater. The system density is 2.0-2.3 g / cm<3>. The drilling fluid system possesses the temperature resistance reaching to 200 DEG C and the density up to 2.3 g / cm<3>, and possesses relatively strong stability, inhibition property, lubricity, storage-layer protection property, degradability, no toxicity and harm to environment under the conditions of high temperature and high density.

Description

technical field [0001] The invention relates to a drilling fluid, in particular to a high-temperature-resistant high-density solid-phase-free drilling fluid system, which belongs to the technical field of petroleum drilling. Background technique [0002] As the world's demand for oil resources continues to increase and conventional easy-to-exploit oil resources are further developed, the exploration and development of oil resources is developing in high-temperature, high-pressure and other difficult areas. [0003] High-density drilling fluid can hold down the formation, maintain the stability of the well wall and prevent accidents such as overflow and blowout. Therefore, high-density drilling fluid is of great significance to the exploration and development of deep formation oil and gas reservoirs. [0004] High temperature will cause the drilling fluid to ferment, thicken and lose efficacy, which will lead to drastic changes in the performance of the drilling fluid, and it...

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 Patents(China)
IPC IPC(8): C09K8/12
CPCC09K8/12C09K2208/34
Inventor 谢玉洪董星亮李中黄熠李炎军张超吴江杨仲涵陈浩东王巍张可王泽峰谢露
Owner CHINA NAT OFFSHORE OIL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com