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Off-ground treatment technology for waste drilling fluid

A technology for drilling mud and waste mud, which is applied in sludge treatment, mining wastewater treatment, water/sludge/sewage treatment, etc. It can solve the problems of high operating conditions, high treatment costs, environmental pollution, etc., and solve the treatment costs high effect

Inactive Publication Date: 2016-10-26
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a waste drilling mud treatment technology that does not fall to the ground while drilling, which effectively solves the problems of high processing costs, high requirements for operating conditions, and environmental pollution

Method used

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  • Off-ground treatment technology for waste drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take the oilfield waste drilling water-based mud with a solid content of 44.5% as an example. Take 1000mL of mud, stir at a stirring speed of 200r / min for 20min, then add 70g of polyacrylamide with a concentration of 3%, an appropriate amount of sulfuric acid as an acidulant, 10g of aluminum chloride with a concentration of 3% of an inorganic coagulant and 10g of aluminum chloride with a concentration of 2 % sodium dodecylsulfonate 1g, fully stirred until all the flocs are clustered, and the flocs are centrifuged with a centrifuge at a speed of 2000-3000r / min, and the centrifugation time is 5-10min. The solid content of the mud cake after solid-liquid separation was 85.2%.

Embodiment 2

[0024] Take the oilfield waste drilling water-based mud with a solid content of 24.6% as an example. Take 1000mL of mud and stir for 20min at a stirring speed of 200r / min; then add 45g of polyacrylamide with a concentration of 5%, an appropriate amount of acidulant acetic acid, 15g of calcium chloride with a concentration of 2% of inorganic coagulant aid and 2% of Polyethylene oxide 1g, fully stirred until all flocs are grouped together, and mechanically separated by plate and frame filter press, the separation time is 35min. The solid content of the mud cake after solid-liquid separation is 91.3%.

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Abstract

Disclosed is a novel off-ground treatment technology for drilling fluid. According to the two mechanisms of colloid chemical coagulation and solid waste flocculation, a colloid coagulation agent, an acidifying agent, stepless coagulant aids and a decolorising agent are sequentially added into the waste drilling fluid and stirred step by step, and finally, a mud-water separation effect is realized through a mechanical separation mode. The novel off-ground treatment technology for the drilling fluid is simple, safe in operation, low in cost, good in repeatability and suitable for industrial application. Solid mud obtained through the method is large in density, hard in texture and good in dispersing performance, has good application value in plate and frame moulding, and meanwhile can be used for making ornamental ceramic crafts.

Description

technical field [0001] The invention relates to a treatment technology of waste drilling mud, in particular to a treatment technology of waste drilling mud without falling to the ground. Background technique [0002] Waste drilling mud is one of the three major sources of pollution in oil and gas field operations. With the exploration and development of petroleum resources, it brings people valuable resources and also brings great environmental hazards. If these wastes are randomly piled up without treatment, the soil, surface and groundwater will be polluted, and in severe cases, it will even pose a serious threat to the surrounding vegetation, livestock and people. Therefore, the effective treatment of waste drilling mud has attracted more and more attention from scholars at home and abroad. [0003] At present, the internationally recognized waste drilling mud treatment methods are divided into seven types: chemical solidification method, chemical solid-liquid separatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/06C02F11/14C02F11/00C02F11/12C02F103/10
CPCE21B21/068C02F11/00C02F11/122C02F11/127C02F11/14C02F2103/10E21B21/065
Inventor 郑帼王彩林吴波刘会兵朱佳文刘燕军周存徐进云孙玉
Owner TIANJIN POLYTECHNIC UNIV
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