Well drilling waste reinjection system and method

Abstract

The invention discloses a well drilling waste reinjection system. The well drilling waste reinjection system comprises a solid-phase waste reinjection subsystem, a water supply pipeline and a liquid-phase waste reinjection subsystem. The solid-phase waste reinjection subsystem comprises a grinding device set, an adhesive manufacturing device and a reinjection pump, wherein the adhesive manufacturing device is connected with the grinding device set in series, and the reinjection pump is connected with the adhesive manufacturing device in series. The water supply pipeline is used for supplying water to the grinding device set. The liquid-phase waste reinjection subsystem comprises an oil-water separation device, wherein a water outlet of the oil-water separation device is connected with the water supply pipeline. According to the well drilling waste reinjection system, one-stop type processing of solid-phase waste and liquid-phase waste is achieved; due to the fact that the two subsystems are arranged together, the occupied area can be effectively reduced; water generated in the liquid-phase waste reinjection subsystem is directly provided for the grinding device set in the solid-phase waste reinjection subsystem and used for slurrying, the water generated in the liquid-phase waste reinjection subsystem can be effectively utilized, and waste of water resources is reduced. The invention further discloses a well drilling waste reinjection method.

Description

technical field [0001] The invention relates to the technical field of treatment of land drilling waste, in particular to a reinjection system and method for drilling waste. Background technique [0002] As we all know, a large amount of waste will be generated during the drilling process. These wastes can be roughly divided into three types, one of which is pure solid phase waste, one is pure liquid phase waste, and the other is solid-liquid mixed waste. These wastes usually contain a large amount of harmful chemical substances. If they are not treated in time, they will cause serious pollution to the natural environment. [0003] The drilling waste reinjection method is a relatively mature waste treatment method. The so-called drilling waste reinjection method is to mix the drilling waste with water to form a pumpable slurry, and then inject the slurry back into the deep well Bottom. [0004] At present, the drilling waste reinjection system includes a solid phase waste ...

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Problems solved by technology

[0006] It can be seen that in the current drilling waste reinjection system, the treatment of the solid phase waste reinjection system and the liquid phase waste reinjection system are separate, and the two systems work independently and are not related to each other, and usually , the two systems are far apart, the water in the liquid phase waste reinjection system is directly reinjected into the deep well bottom, and the large amount of water required in the solid phase waste reinjection system needs to be supplied separately, which not only leads to The entire drilling waste reinjection system has high requirements on the space of the operation site, and also causes a waste of water resources

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