Sand-prevention filling device capable of preventing jamming

Abstract

Disclosed is a sand-prevention filling device capable of preventing jamming. After the sand-prevention filling device is put downwards into a well, a delivery ball is delivered, and pressurizing is conducted, so that a rubber cylinder is expanded to seal a sleeve, and a slip is anchored on the sleeve; then a pipe column is rotated to enable a separating joint to be disengaged from a fishing joint,the pipe column is lifted up by a certain height, a locking device is motionless, and thus the total length after the locking device is connected with a connecting pipe is increased; when the sand-prevention filling device is put downwards again, it is ensured that an inner communicating hole continues to be aligned with a middle inner communicating hole, the pressure is increased, a shear pin issheared off, a valve seat falls, the inner communicating hole and an outer communicating hole communicate, and filling sand-prevention can be conducted by opening a filling channel; and after sand prevention and waiting on cement setting, the pipe column is lifted up to take out the interior of the sand-prevention filling device, then normal production can be conducted, therefore, after sand prevention and waiting on cement setting, the pipe column does not need to be rotated to enable the separating joint to be disengaged from the fishing joint, the problem that a part cannot be disengaged due to being jammed with special sand grains is avoided, the accident that the pipe column is jammed can be avoided, and significant economic benefits are achieved.

Description

technical field [0001] The invention is equipment for sand control in oil field strata, and is a sand control filling device capable of preventing jamming. Background technique [0002] There are two types of sand control in oil wells: chemical sand control and mechanical sand control. Filling the wellbore with special sand particles, and relying on this special sand particles to prevent sand in the oil layer from entering the well is a kind of mechanical sand control. This kind of mechanical sand control requires a sand control filling tool. After the filling tool is lowered into the well, a sand control liquid carrying special sand particles is injected, so that the sand enters the formation to form a sand retaining wall, so that the formation sand cannot flow out, and the oil can flow out. The structure of the existing sand control filling tool is unreasonable, and it needs to be separated from the sand control pipe string after the sand control construction is waited for...

AI Technical Summary

Problems solved by technology

The structure of the existing sand control filling tool is unreasonable, and it needs to be separated from the sand control pipe string after the sand control construction is waited for. Since the special sand particles will be filled with some parts of the filling tool, after the sand control construction is waited for, the sand control pipe string and the sand control filling If the tool cannot be disengaged, the sand control work will fail, and a major engineering accident will occur. It is necessary to overhaul the oil well to remove it and then carry out sand control again. This will increase the operating procedures and greatly increase the operating cost. Decrease, economic benefits of oil wells decrease

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