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A system and process for harmless treatment of drilling cuttings

A technology of harmless treatment and drilling cuttings, which is applied in the field of drilling cuttings treatment, can solve the problems of endangering the growth of surface plants, affecting the soil structure, polluting the environment, etc., and achieves low production cost, reasonable process steps, and simple and convenient treatment process Effect

Active Publication Date: 2019-03-01
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a harmless treatment system and process for drilling cuttings in order to solve the above-mentioned problems of polluting the environment, affecting the soil structure and endangering the growth of surface plants in the existing drilling cuttings processing process

Method used

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  • A system and process for harmless treatment of drilling cuttings
  • A system and process for harmless treatment of drilling cuttings

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Experimental program
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Effect test

specific Embodiment approach

[0026] seefigure 1 , figure 2 , provides a harmless treatment system for drilling cuttings, including a stirring device and a fermentation device placed in sequence, the stirring device includes a driving motor 1 and two mixing barrels connected in series in sequence, the driving motor 1 and the first mixing barrel 2 Stirring fan blade 21 is axially connected, and the stirring fan blade 21 of the first mixing tank 2 is coaxially connected with the stirring fan blade 31 of the second mixing tank 3, and the discharge port 22 of the first mixing tank is communicated with the second mixing tank 3; The device comprises a fermentation tank 4, and the discharge port 32 of the second mixing tank is located above the fermentation tank 4; the top of the first mixing tank 2 is provided with a first feeding funnel 23, and a feeding funnel 23 is provided on the first feeding funnel 23. Nozzle 24; a second feeding funnel 33 is arranged on the top of the second mixing barrel 3, and a feedin...

Embodiment 1

[0035] Embodiment 1: Adopt above-mentioned processing system and technology to process the cuttings produced by a certain drilling team in an oil field, get cuttings 100kg, add sodium bisulfate 20g, calcium dihydrogen phosphate 220g, potassium dihydrogen phosphate 450g, ammonium bisulfate 6g , ferric chloride 0.3g, zinc acetate 2g composite alkali inhibitor, add microbial culture solution 5000ml, soil conditioner 5kg. Among them, 60 parts of peat soil in soil improvement agent, 30 parts of sludge with a water content of 40% after pressure filtration and dehydration in domestic sewage plants, 5 parts of chicken manure dried at 70 ° C, 3 parts of desulfurized gypsum produced by power plants, broken corn Straw 5 parts. After three months of fermentation treatment, the experimental results of the leachate produced are shown in Table 1. Compared with the "Comprehensive Wastewater Discharge Standard" (GB8978-1996), the results are all qualified.

[0036] Table 1

[0037] ...

Embodiment 2

[0039] Embodiment 2: Adopt above-mentioned treatment system and process to process the cuttings produced by a certain drilling team in an oil field, get cuttings 100kg, add sodium bisulfate 12g, calcium dihydrogen phosphate 150g, potassium dihydrogen phosphate 400g, ammonium bisulfate 6g , ferric chloride 0.6g, zinc acetate 3g compound alkali inhibitor, add microbial culture solution 6000ml, soil conditioner 4kg. Among them, 50 parts of peat soil in soil improvement agent, 30 parts of sludge with a moisture content of 50% after pressure filtration and dehydration in domestic sewage plants, 15 parts of chicken manure dried at 70°C, 4 parts of desulfurized gypsum produced by power plants, broken corn Straw 5 parts. After three months of fermentation treatment, the experimental results of the leachate produced are shown in Table 2. Compared with the "Comprehensive Wastewater Discharge Standard" (GB8978-1996), the results are all qualified.

[0040] Table 2

[0041] Pol...

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Abstract

The invention relates to a harmless treatment system and process for drilling cuttings. The treatment system comprises a agitation device and a fermenting device which are arranged in sequence, wherein the agitation device comprises a driving motor and two agitation vats which are sequentially connected in series; the driving motor is coupled to agitation fan blades of the first agitation vat, the agitation fan blades of the first agitation vat are coaxially connected with the agitation fan blades of the second agitation vat, and a discharge port of the first agitation vat communicates with the second agitation vat; the fermenting device comprises a fermenting vat, and a discharge port of the second agitation vat is located above the fermenting vat; a first feeding funnel is arranged on the top of the first agitation vat, and a charging nozzle is arranged on the first feeding funnel for adding an alkali inhibitor; a second feeding funnel is arranged on the top of the second agitation vat for adding a soil texture modifier, and a charging sprinkler is arranged on the second feeding nozzle for adding a microorganism culture liquid and degrading organic pollutants in the drilling cuttings. The drilling cuttings treated by the treatment system and treatment process can form an earth's surface soil structure, so that plant growth is facilitated.

Description

technical field [0001] The invention relates to the technical field of drilling cuttings treatment, in particular to a harmless treatment system and process for drilling cuttings. Background technique [0002] In the process of oil exploration and development, with the strengthening of environmental protection awareness, more and more attention has been paid to wastes such as drilling cuttings generated during drilling. Drill cuttings are primary minerals in the formation that are broken by the drill bit during drilling and carried back to the ground through the mud circulation system. Drill cuttings are the main solid waste generated during the drilling process. The drilling cuttings produced by drilling an oil well are hundreds of cubic meters. Drilling cuttings produced by drilling in an oil field can reach hundreds of thousands of cubic meters every year, and untreated cuttings will cause great potential harm to the surrounding environment, especially farmland. [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/02A62D101/40A62D101/43A62D101/20
CPCA62D3/02A62D2101/20A62D2101/40A62D2101/43
Inventor 高洪阁杜树坚陈丽慧寇小燕高明洋
Owner SHANDONG UNIV OF SCI & TECH
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