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Process and device for recovering base oil in drilling-oil-based mud debris

A technology of oil-based mud and recovery device, which is applied in earthwork drilling, wellbore flushing, wellbore/well parts, etc. It can solve the problems that cannot be reused, cannot be used for preparation again, and the processing capacity is small. Effects of mud congestion and fluidity issues, improved reliability and operational efficiency, and reduced treatment costs

Pending Publication Date: 2019-09-20
成都华寰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, thermal desorption obtains base oil through heating and distillation. Because this process needs to heat the mud to above 400°C, part of the base oil will be thermally cracked, and harmful and odorous volatile organic gases will be produced. The recovered base oil cannot be reused. In the preparation of drilling oil-based mud cuttings, it cannot be reused in other fields; the extraction process uses an extraction agent to achieve the three-phase separation of solid, oil, and water, and the recovered base oil can be recycled twice, but the cost is high , Problems with small processing capacity

Method used

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  • Process and device for recovering base oil in drilling-oil-based mud debris
  • Process and device for recovering base oil in drilling-oil-based mud debris
  • Process and device for recovering base oil in drilling-oil-based mud debris

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Embodiment 1

[0033] The drilling oil-based mud cuttings in the present invention are collected from a certain shale gas drilling platform in Sichuan, and the specific components and properties are shown in Table 1.

[0034] Table 1 Composition and properties of waste drilling oil-based mud cuttings

[0035]

Embodiment 2

[0037] Drilling oil-based mud cuttings processing equipment consists of a slurry heater, a horizontal screw centrifuge, a high-temperature steam pipeline, a condensing device, a drilling fluid storage tank, an oil and gas collection pipeline, a waste water collection pipeline and an exhaust gas pipeline. The specific implementation steps are:

[0038] Drilling oil-based mud cuttings are sent into the slurry heater from the feed port, filling the space between the shell and the hollow disc, and the drilling oil-based mud cuttings are stirred by the action of the propeller / stirrer on the disc , advance. The hot steam at the end of the cement kiln enters from the entrance of the heat source, flows through the hollow shaft and the hollow disc, and the high-temperature steam enters the heating hollow disc of the slurry heater to indirectly heat the drilling oil-based mud cuttings. The heating and condensation process will produce hot drilling oil-based mud cuttings, oily gas, non-...

Embodiment 3

[0041]Drilling oil-based mud cuttings processing equipment consists of slurry heaters, tubular centrifuges, high-temperature steam pipelines, condensing devices, drilling fluid storage tanks, oil and gas collection pipelines, waste water collection pipelines and exhaust gas pipelines.

[0042] Drilling oil-based mud cuttings are sent into the slurry heater from the feed port, filling the space between the shell and the hollow disc, and the drilling oil-based mud cuttings are stirred by the action of the propeller / stirrer on the disc , advance. The hot steam at the end of the cement kiln enters from the entrance of the heat source, flows through the hollow shaft and the hollow disc, and the high-temperature steam enters the heating hollow disc of the slurry heater to indirectly heat the drilling oil-based mud cuttings. The heating process will produce hot drilling oil-based mud cuttings, oily gas, non-condensable gas, oily sewage, and dirty cold water. The hot drilling oil-base...

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Abstract

The invention provides a process and device for recovering base oil in drilling-oil-based mud debris, and discloses a process and device for recovering the base oil in waste-oil-based drilling mud. The device is composed of a heater, a high-speed centrifuge, a condensing device and a base oil storing tank. The process comprises the steps: the waste-oil-based mud is fed into the heater and heated to 40-350 DEG C through heat transfer, the heated waste-oil-based mud enters the high-speed centrifuge, tiny solid particles of the waste-oil-based mud are centrifugally separated, oil-containing steam generated in the heating and centrifuging processes is cooled into cooling liquid through the condensing device, and the cooling liquid is recovered and guided into the centrifuged base oil completely. The solid particles and the base oil in the waste-oil-based mud are separated through low-temperature heating and centrifugal separation, the physical property of the base oil is not changed, the base oil can be used for preparing the oil-based drilling mud secondarily, the waste-oil-based mud is heated through waste heat from the kiln tail of a cement kiln, the utilization rate of the heat of the cement kiln is further increased, the operation cost of the separation process is lowered, the waste-oil-based mud is heated through indirect contact, and the security coefficient of equipment operation is effectively increased.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste treatment, and relates to a technical method for co-processing hazardous waste in cement kilns, in particular to a system device for co-processing drilling oil-based mud cuttings in cement kilns. Background technique [0002] Drilling oil-based cuttings are a kind of solid waste produced during the drilling of oil and gas resources. Since they contain a large amount of oil, direct discharge will seriously pollute the environment. They are hazardous wastes clearly stipulated by the state. The harmless treatment of drilling oil-based mud cuttings has become a pain point and difficulty in the process of green exploitation of oil and gas resources. [0003] The currently used treatment process is to first separate the cuttings in the oil-based drilling fluid through a vibrating screen, and then dehydrate and deoil the oil-based drilling cuttings through a dryer and a centrifuge to form low oil...

Claims

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Application Information

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IPC IPC(8): E21B21/06E21B41/00
CPCE21B21/065E21B41/005
Inventor 陈绍华杨璐瑞静
Owner 成都华寰环保科技有限公司
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