Tool special for fracturing layers with little oil and without oil

Abstract

The invention relates to a tool special for fracturing layers with little oil and without oil. The tool is specially used for re-fracturing a stratum with little oil to produce a new oil layer. The tool comprises an oil cylinder barrel, a slide tube, a connecting flange, a sealing rubber cup, a guide head, balance valves, lock rings, an upper connector, a sand remover, a lifting valve and an elastic sealing shockproof ring. The slide tube can slide inside the oil cylinder barrel by the aid of a balance pipeline formed by the balance valves and a pipeline and a lifting pipeline formed by the lifting valve and a pipeline, so that high-pressure liquid can reach a to-be-fractured layer without contacting with the inner cavity of a wellhead. The tool special for fracturing the layers with little oil and without oil is long in service life, reusable, and the like.

Description

technical field [0001] The invention relates to a special tool for fracturing with little oil and no oil layer, which is suitable for the working environment where new oil layers are produced by refracturing oil-less formations, and belongs to the field of mechanical manufacturing. Background technique [0002] In the known oil recovery process, some oil wells usually have less oil or no oil due to the thickness of the oil layer or other factors after pumping for a period of time under normal circumstances, and continue pumping, which not only wastes costs, but also causes extreme damage to the pumping unit. Great wear and tear. In some cases, there is oil in the lower layer of the oil-free layer and cannot be taken, and the well has to be shut down or re-drilled, which has caused great manpower, financial resources and time loss. Therefore, it is urgently desired to have a tool that can extend the punching force to the oil-free layer until the oil-free layer is cracked wit...

AI Technical Summary

Problems solved by technology

[0002] In the known oil production process, some oil wells usually have less oil or no oil due to the thickness of the oil layer or other factors after the pumping unit pumps oil for a period of time under normal circumstances, and then continue to pump, which not only wastes the cost, but also causes extreme damage to the pumping unit. big wear

In some cases, there is oil in the lower layer of the oil-free layer and cannot be recovered, and the well has to be shut down or re-drilled, resulting in a great loss of manpower, financial resources and time.

Images