Vacuum suction pitshaft fishing and cleaning tool

Abstract

The invention provides a vacuum suction wellbore fishing and cleaning tool, which includes a body capable of being connected with a drilling tool as a whole, and a nozzle seat, a guide pipe, a screen and a one-way valve sequentially arranged inside the body; the body is cylindrical; the nozzle The seat is fixed on the inner wall of the body; one or more nozzles are arranged on the nozzle seat, and each nozzle is not perpendicular to the bottom surface of the nozzle seat; one or more guide tubes are fixedly installed on the lower side of the corresponding nozzle seat, and the guide tube The diameter is larger than that of the nozzle, and the central axis of each guide pipe coincides with the extension line of the central axis of the nozzle; the screen is arranged on the lower side of the guide pipe; the one-way valve is arranged at the bottom of the body. The vacuum suction wellbore fishing and cleaning tool uses the Venturi principle to form a negative pressure in the device, and sucks the fluid mixed with falling objects and debris into the body to complete the fishing. The fishing effect is good and the efficiency is high.

Description

technical field [0001] The invention relates to the field of oil drilling and workover, in particular to a vacuum suction wellbore fishing and cleaning tool. Background technique [0002] During drilling and workover operations, a large amount of loose debris and debris are often produced downhole, which need to be cleaned up to ensure the normal construction of the next step. Because loose debris and debris often have physical characteristics such as small size, high density, and large quantity, it is difficult to salvage them. Conventional fishing tools need to go into the well for multiple times to salvage such debris, but the effect is often Unsatisfactory; will inevitably increase the risk and cost of drilling and workover operations. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a vacuum suction wellbore fishing and cleaning tool, which uses the Venturi principle to form a negative pressure in the d...

AI Technical Summary

Problems solved by technology

Because loose debris and debris often have physical characteristics such as small size, high density, and large quantity, it is difficult to salvage them. Conventional fishing tools need to go into the well for multiple times to salvage such debris, but the effect is often Unsatisfactory; will inevitably increase the risk and cost of drilling and workover operations

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