Recovery device of well drilling liquid

Abstract

The invention discloses a recovery device of well drilling liquid, wherein the recovery device meets the solid-liquid separation of well drilling liquid with different concentrations and particle sizes. The recovery device comprises a first reversing valve, a vibration screen, a second reversing valve, a filtering centrifuge, a sedimentation centrifuge, a first liquid collecting groove and a chemical pump, wherein three outlets of the first reversing valve are respectively connected with an inlet of the vibration screen, an inlet of the second reversing valve and an inlet of the sedimentation centrifuge; an outlet of the vibration screen is also connected with the inlet of the second reversing valve; two outlets of the second reversing valve are respectively connected with an inlet of the filtering centrifuge and the inlet of the sedimentation centrifuge; an outlet of the filtering centrifuge is also connected with the inlet of the sedimentation centrifuge; an outlet of the sedimentation centrifuge is connected with the first liquid collecting groove; and the chemical pump is connected with the first liquid collecting groove. The recovery device has the advantages that: the vibration screen, the filtering centrifuge and the sedimentation centrifuge are arranged; and according to different solid phase concentrations of the well drilling liquid, the well drilling liquid is subjected to solid-liquid separation through different separation equipments by utilizing the reversing valve, so that the requirements of recovering the well drilling liquid with different concentrations are met.

Description

technical field [0001] The invention relates to a recovery device for drilling fluid. Background technique [0002] At present, neither the domestic onshore drilling industry nor the offshore drilling industry has realized the recycling of drilling fluid, which is a relatively serious waste of resources and will also cause certain damage to the environment. In foreign countries, a single spiral filter centrifuge is currently used to achieve solids control in offshore drilling, and a single spiral decanter centrifuge is mostly used in the onshore drilling industry, which can achieve the drilling fluid to a certain extent. Reuse. However, due to the singleness of system functions, its application is greatly restricted by the concentration of mother liquor and the size of solid particles, so the effect and efficiency of solid control are not very ideal. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a recovery de...

AI Technical Summary

Problems solved by technology

However, due to the singleness of system functions, its application is greatly restricted by the concentration of mother liquor and the size of solid particles, so the effect and efficiency of solid control are not very ideal

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