A system mixing machine for oil sludge produced in offshore oilfields and reinjected into formations

Abstract

The invention discloses an all-in-one system mixing machine for reinjecting oil sludge produced in offshore oilfields into formations, which includes a tank body and an upper grinding assembly, a lower grinding assembly, a high-temperature cavity, and an annular liquid collection sequentially arranged in the tank body from top to bottom. Groove, vibrating screen group, the tank is vertically provided with a centrifugal rod, the upper end of the centrifugal rod extends outside the upper end of the tank body, and the lower end is provided with a centrifugal screen, the centrifugal screen includes a straight screen part, an inclined screen part, a bottom screen The ring-shaped liquid collection tank is located under the straight cylinder sieve, the top of the high-temperature cavity is provided with a vent hole, and the tank body is respectively provided with a feed hole, an air outlet hole, an air inlet hole, a liquid inlet hole, a drive Parts, drain holes, and liquid outlet holes connected to the bottom of the inner cavity of the tank, the drive parts drive the vibrating screen group to vibrate, the top of the tank body is provided with a centrifugal shaft drive mechanism, and the outer surface of the tank body is also provided with Rotary shaft drive mechanism. The invention can well mix the output sludge and carry viscous fluid, and improve its injection performance.

Description

technical field [0001] The invention relates to an all-in-one system mixing machine for reinjecting oil sludge produced in offshore oil fields into strata, and belongs to the technical field of petroleum industry equipment. Background technique [0002] At present, in the process of oil production and development in major oil fields in my country, more or less oil sludge has appeared in the production wells. For the treatment of oil sludge, there are many application methods in onshore oilfields, such as landfill and brick burning (Li Wenhao. Experimental research on autoclaved aerated concrete blocks prepared from oil sludge sand [D]. Shandong University of Technology, 2014; Yu Kun .Current status of oilfield produced water treatment technology[C].China Oil and Gas Field Surface Engineering Technology Exchange Conference Nanning 2013); for offshore oilfields, it cannot be effectively treated on site, but its high transportation costs make it necessary to deal with it. The...

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Problems solved by technology

However, although some achievements have been made in many practical applications (Hu Feifei, Li Qing, Jingbo, etc. Reinjection of muddy water after treatment of marine polymer-containing sludge [J]. Chemical Environmental Protection, 2015, 4: 381-385; Zhu Guilin. Integral Reinjection and Comprehensive Utilization Technology of Binnan Oilfield Sludge [J]. Oil and Gas Geology and Recovery, 2007 (04): 92-94.), but there are still serious injection problems

The mixing effect determines the injection capacity of the system. The most widely used mixing device is the solid-liquid rotating mixer. However, considering the poor dispersion effect of the produced sludge, it is often dried at high temperature and then ground into fine particles before further processing. Dispersed treatment (Liu Xiaoyu, Yin Xianqing, Wang Wenbin, Jingbo, Zhang Jian. Process parameter optimization and interaction analysis of polymer-containing oil sludge [J]. Chemical Environmental Protection, 2018, 38(04): 451-455; Fang Jian, Teng Dayong, Qi Yuan, Tian Xiaobai.Research Progress on Properties and Treatment Technology of Oilfield Polymer Sludge[J].Modern Chemical Industry,2019,48(08):1787-1790.)

The application of this type of method covers a large area and requires a lot of manpower, so it is difficult to effectively apply it in offshore oilfields

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