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A process for recovering oil-based mud from oil-based mud drilling waste

A drilling waste and oil-based mud technology, which is applied in the technical field of recovering oil-based mud from oil-based mud drilling waste, can solve the problems of pollutant diffusion, secondary pollution, and high environmental conditions, and achieve economic benefits and Unified environmental benefit, strong anti-wear and clogging ability, good stability and reliability

Active Publication Date: 2017-01-25
四川博盛永业工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The incineration method requires a large investment, high operating costs, and is likely to cause secondary pollution
Landfill treatment does not realize the true harmlessness of pollutants, but only transfers pollutants to the ground, and encounters rainfall or underground runoff, which may lead to the spread of pollutants
The microbial treatment cycle is long and requires high environmental conditions

Method used

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  • A process for recovering oil-based mud from oil-based mud drilling waste
  • A process for recovering oil-based mud from oil-based mud drilling waste
  • A process for recovering oil-based mud from oil-based mud drilling waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A resource recycling project of diesel-based mud in oil-based drilling waste was implemented in an oilfield in Xinjiang. Oil-based drilling waste mainly includes waste oil-based mud and oily drilling cuttings, with an oil content of about 20-30%. In this embodiment, the drilling process is mainly sandstone, and the cuttings are mainly sandstone particles. The particle size of the cuttings is relatively large, about 0.2-10mm, and the mechanical strength and hardness of the particles are relatively high. Rotating speed. The design approved treatment capacity is 0.5m 3 / h equipment to investigate the processing capacity, processing effect and process stability of the process.

[0028] combine figure 1 , The feed section is equipped with a feed screen with an aperture of 4cm to prevent foreign matter from entering the centrifugal filter equipment and causing blockage. After passing through the feeding screen, the maximum particle size of the solid phase is 3~4cm, the med...

Embodiment 2

[0045] A resource recycling project of diesel-based mud in oil-based drilling waste was implemented in an oilfield in Xinjiang. The drilling process was dominated by sandstone, and the characteristics of the drilling waste material were the same as in Example 1. In this example, the design and approved treatment capacity was adopted. 3m 3 / h equipment to investigate the processing capacity, processing effect and process stability of the process.

[0046] In the feeding section, a feeding screen is added, and the aperture of the screen is 3cm. After passing through the feeding screen, the maximum particle size of the solid phase is 2.6cm, the median particle size is about 1.0mm, and the liquid content of the solid phase is about 21 %.

[0047] Comprehensive selection of filters with apertures of 0.5, 0.8, 1.5, 2.0, 4.0, and 5.0 mm for centrifugal filtration, the centrifugal speed is 1000r / min, the implementation effect of centrifugal filtration with different apertures is show...

Embodiment 3

[0062] A resource recycling project of diesel-based mud in oil-based drilling waste was implemented in an oilfield in Xinjiang. In this example, the drilling process was dominated by mudstone, and the drilling cuttings mainly included mudstone cuttings, whose particle mechanical strength was low, and the particle The diameter is small, about 0.05~0.1mm. In this embodiment, the design approved treatment capacity is 0.5m 3 / h equipment to investigate the processing capacity, processing effect and process stability of the process. The process includes feed filtration, centrifugal filtration, and centrifugal sedimentation.

[0063] The feeding section is equipped with a feeding screen with an aperture of 3 cm. After passing through the feeding screen, the maximum particle size of the solid phase is 2.6 cm, the median particle size is about 1.0 mm, and the liquid content of the solid phase is about 16%.

[0064] During the implementation process, in view of the small particle size...

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Abstract

The invention belongs to the field of oil-based mud or drilling cuttings treatment, and in particular relates to a process for recovering oil-based mud from oily oil-based drilling waste, characterized in that: the treatment and recovery process includes high-efficiency centrifugal filtration, homogenization and centrifugal sedimentation Through the optimization of process parameters, the efficient recovery of oil-based mud from oil-containing waste generated by oil-based mud drilling projects can be realized, and the standard of reuse drilling technology can be achieved. The process in the present invention has the characteristics of high oil-based mud recovery rate, the recovered oil-based mud can be directly reused in drilling projects, no secondary pollution, simple process and mild operating conditions, etc., and is suitable for processing various oil-based mud drilling projects Oily waste produced. After being treated by the treatment and recovery process of the present invention, the oil-based mud resource in the oily waste can be efficiently recovered, the recovery rate is high, the pollutant content is greatly reduced, and the invention has remarkable economic and environmental benefits.

Description

technical field [0001] The invention belongs to the field of resource recovery and oily waste treatment from oil-based waste produced in oil-based mud drilling engineering, and in particular relates to a process for recovering oil-based mud from oil-based mud drilling waste. Background technique [0002] Oil-based mud has significant advantages for drilling, especially in salt-gypsum formations and water-sensitive formations. Oil-based mud uses diesel oil, white oil, bio-oil, mineral oil, synthetic oil, etc. as the base oil to add various oilfield chemical agents, and is currently the most commonly used type of oil-based mud in the world. Oil-based mud drilling wastes are generated during oil-based mud drilling, mainly including oily drill cuttings, mud leakage from shale shaker, cementing flowback mixed slurry, plugging flowback fluid, well completion cleaning tank bottom mud, etc. Single well production is about 250-500m 3 range, the oil content is about 18~25%, of which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B21/06
Inventor 王兵安文华任宏洋尹达黎跃东叶艳徐阳
Owner 四川博盛永业工程技术有限公司
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