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Treatment method of drilling waste

A drilling waste and treatment method technology, applied in the field of drilling waste treatment, can solve the problems of complex operating conditions, low oil content, high treatment cost, etc., and achieve the effects of short process flow, short treatment time and high treatment efficiency

Active Publication Date: 2018-12-18
XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the object of this method is a waste with a very low oil content, so the treatment cost is high, and because the oil is separated and recovered through the extraction method, the operating conditions are relatively complicated

Method used

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  • Treatment method of drilling waste
  • Treatment method of drilling waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Treatment of drilling waste in Xinjiang Oilfield:

[0029]A treatment method for drilling waste according to the present invention, the treatment device involved in the method is composed of a water washing separator 1, an impeller 12, a cuttings discharge port 13, a vibrating screen 14, a water discharge port 15, a pipeline 2, a first Water pump 3, first dosing mixer 4, microwave reactor 5, second water pump 6, second dosing mixer 7, air flotation device 8, air flotation device slag outlet 16, dissolved air pump 9, third water pump 10 Composed of a magnetizer 11, one end of the microwave reactor 5 is connected in series with the drain outlet 15 at the bottom of the first dosing mixer 4, the first water pump 3 and the vibrating screen 14 respectively through the pipeline 2, and the vibrating screen 14 is connected with the washing separator 1 , the top of the vibrating screen 14 is provided with a debris discharge port 13, the mesh size of the vibrating screen 14 is 0.1...

Embodiment 2

[0035] Treatment of drilling waste in Tarim Oilfield:

[0036] The processing device of the present embodiment is carried out according to embodiment 1, and concrete operation is carried out according to the following steps:

[0037] a. The drill cuttings separated by the vibrating screen 14 are imported into the cleaning area in the water washing separator 1 according to the weight ratio drill cuttings:cleaning liquid=1:5, and first pass through the agitation of the impeller 12 and the vibration of the ultrasonic vibrator to clean the drill cuttings. The cleaned cuttings are brought to the spraying area by the wheel bucket, and further cleaned under the action of spraying. The sprayed cuttings are sent to the vibrating screen 14 for dehydration treatment. The water content in the treated cuttings The rate is 11%, and the processing capacity of solid cuttings is 2 cubic meters per hour;

[0038] b. The solid phase separated after the dehydration treatment in step a is transfe...

Embodiment 3

[0042] Treatment of drilling waste in Tuha Oilfield:

[0043] The processing device of the present embodiment is carried out according to embodiment 1, and concrete operation is carried out according to the following steps:

[0044] a. The drill cuttings separated by the vibrating screen 14 are imported into the cleaning area in the water washing separator 1 according to the weight ratio drill cuttings:cleaning liquid=1:7. The cleaned cuttings are brought to the spraying area by the wheel bucket, and further cleaned under the action of spraying. The sprayed cuttings are sent to the vibrating screen 14 for dehydration treatment. The water content in the treated cuttings The rate is 10%, and the processing capacity of solid cuttings is 3.5 cubic meters per hour;

[0045] b. The solid phase separated after the dehydration treatment in step a is transferred to the bioremediation field for microbial remediation treatment. After 60 days of bioremediation, the oil content in the tre...

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Abstract

The invention relates to a treatment method of drilling waste. A treatment device involved in the method is composed of a water washing separator, an impeller, a rock debris discharge opening, a vibrating screen, a water outlet, a pipeline, a first water pump, a first dosing mixer, a microwave reactor, a second water pump, a second dosing mixer, an air floating device, an air floating device slagdischarging port, an air dissolving pump, a third water pump and a magnetizer, wherein rock debris separated from the vibrating screen is washed with water by the water washing separator, the water-washed solid-phase rock debris is subjected to microbial remediation treatment, a small quantity of residual harmful pollutants are further removed, the pollutant content is lower than a specified limitvalue, and then resource reutilization is realized; water-washed liquid-phase sewage is subjected to microwave catalytic oxidation, flocculation and air floatation separation to serve as cleaning water for recycling. The method has the advantages of being simple in process, thorough in pollutant removal, capable of realizing resource utilization, low in treatment cost and the like, and large-scale application can be carried out on a drilling site of an oil and gas field.

Description

technical field [0001] The invention relates to a treatment method for drilling waste. Background technique [0002] Drilling is the process of using mechanical equipment to drill the formation into a larger hole. It is the main means of oil and natural gas exploration and development, because oil and natural gas are buried in rocks at different depths underground. Drilling cuttings are formation cuttings that are destroyed by the drill bit and carried back to the ground through the mud circulation system during the drilling process, and are the main waste during the drilling process. Drilling cuttings are produced with spent drilling fluid and thus its composition includes drilling fluid and formation components. Taking China National Petroleum Corporation as an example, the total number of wells drilled each year is 13,000-15,000 wells per year, and the amount of drill cuttings produced is in the millions of cubic meters per year. The main chemical components harmful to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/06
CPCE21B21/06E21B21/066E21B21/068
Inventor 刘向阳李慧敏卞卫国贾悦张芳袁张栌丹安静周龙涛张磊
Owner XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
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