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

Method and process for high strength curing of drilling waste

A drilling waste solidification treatment technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the application of high transportation costs, high energy consumption, and no effective solidification of salty drilling waste Technical and other issues, to achieve the effect of simple curing process, strong compressive strength, and easy operation of curing process

Inactive Publication Date: 2011-09-14
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
View PDF7 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two processing methods have problems such as high transportation costs and high energy consumption.
None of the above methods has an effective solidification technology for saline drilling waste (drilling waste generated when drilling into a salt-gypsum layer or using brine drilling fluid)

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
  • Method and process for high strength curing of drilling waste
  • Method and process for high strength curing of drilling waste
  • Method and process for high strength curing of drilling waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 1kg of solid waste discharged from the solid control system during the drilling process of an oilfield, mix it with curing agents of different compositions, compact and form, demould after consolidation, and naturally cure at ambient temperature, respectively measure the 3d, 7d, 14d, 28d resistance The compressive strength, the results are shown in Table 1.

[0023] Table 1 Composition and compressive strength of curing agent for high-strength curing treatment of drilling waste

[0024]

[0025] Note: "*" means "untested"

Embodiment 2

[0027] Take the drilling waste in Example 1 and add sodium chloride respectively to make 1 kg of simulated saline drilling waste with different sodium chloride content, and perform curing treatment according to the composition of No. 5 curing agent in Table 1. The compressive strength results are shown in Table 2.

[0028] Table 2 High-strength solidification and compressive strength of saline drilling waste

[0029]

[0030] Note: "*" means "untested"

Embodiment 3

[0032] Take the above-mentioned drilling waste, No. 5, No. 6, and No. 10 solidified drilling waste samples, grind them to a particle size of less than 9.5 mm, and adjust the pH of laboratory pure water to 3.25 with sulfuric acid-nitric acid (mass ratio 2:1). Weigh the solid sample and extractant according to the ratio of 1:10, shake horizontally for 8 hours (frequency 110±2 times / min), stand still for 16 hours, filter with 0.45 cellulose acetate filter membrane, test the composition of heavy metal ions in the leachate, the results are shown in the table 3.

[0033] Table 3 Composition of heavy metal ions in leachate of solidified drilling waste

[0034]

[0035] Note: "-" indicates "not detected"

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
Compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method and a process for the high strength curing of drilling waste, in particular to a curing agent and a curing process. The curing agent consists of the following components in percentage by weight: 30 to 35 percent of magnesia, 20 to 25 percent of magnesium chloride, 30 to 35 percent of fly ash, 0.8 to 1 percent of modifier and 10 to 18 percent of water. The curing process comprises the following steps of: uniformly mixing the drilling waste, light burned magnesia, the fly ash and the modifier, adding magnesium chloride aqueous solution into the mixture, quickly mixing, putting into a die, performing compaction molding, demolding, and naturally curing at the environment temperature. The compression strength of a product after the product is cured for 28 days can reach 40MPa, the compression strength of the drilling waste with 10 percent of salt after the drilling waste is cured for 28 days can reach 32MPa, and extract heavy metal ions meet the environment-friendly requirement. The cured product has high compression strength and comprises 40 to 60 percent of drilling waste, and the cured drilling waste has high stability and recycling value.

Description

technical field [0001] The invention relates to the field of oil and gas field waste treatment and its resource utilization. Background technique [0002] Drilling waste in the present invention mainly refers to solid waste formed from dehydrated or dried waste drilling fluid and drilling cuttings in petroleum drilling. [0003] Such solid wastes generated during drilling mainly include clay, drilling cuttings, weighted materials and organic drilling fluid treatment agents. Untreated drilling waste will bring certain harm to the surrounding environment. For such waste treatment methods, there are mainly methods such as direct discharge, landfill, solidification, annular space or safe formation reinjection. Initially, this type of waste was mainly treated by direct discharge and landfill methods. With the further improvement of environmental requirements, these two methods are subject to certain restrictions. The reinjection of annular spaces and safe formations requires c...

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
IPC IPC(8): C04B28/32C04B18/30
CPCY02W30/91
Inventor 张现斌邱正松陶瑞东徐加放黄维安江琳田刚钟汉毅
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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