Universal positive circulation sand dredging combination tool for oil, gas and water wells

Abstract

The invention provides an oil gas water well universal type positive cycle type high-efficiency inner bailing combination tool. The oil gas water well universal type positive cycle type high-efficiency inner bailing combination tool comprises a first valve body, an upper through hole is formed at the top end of the first valve body and a lower through hole is formed at the bottom end of the first valve body, and the side walls opposite to each other in the first valve body are provided with a sand-carrying fluid outlet hole which is communicated with the lower through hole and the outside, and a power fluid outlet hole which is communicated with the upper through hole and the outside; at least one rubber cup with an opening facing downward is fixed on the first valve body, and the rubber cups are arranged between the upper portion of the power fluid outlet hole and the lower portion of the sand-carrying fluid outlet hole; The oil gas water well universal type positive cycle type high-efficiency inner bailing combination tool further comprises a second valve body, an upper through hole is formed at the top end of the second valve body and a lower through hole is formed at the bottom end of the second valve body, and the side walls opposite to each other in the second valve body are provided with a sand-carrying fluid inlet hole which is communicated with the lower through hole and the outside, and a power fluid inlet hole which is communicated with the upper through hole and the outside; at least one rubber cup with an opening facing upward is fixed on the second valve body, and the rubber cups are arranged between the upper portion of the power fluid outlet hole and the lower portion of the sand-carrying fluid outlet hole.

Description

technical field [0001] The invention relates to the technical field of sand removal for oil, gas and water wells, in particular to a general-purpose positive circulation internal sand fishing combined tool for oil, gas and water wells. Background technique [0002] Sand production in oil and gas well formations is one of the important problems encountered in the development of oil and gas fields. There are many reasons for sand production in oil, gas and water well formations. For example, the movement of formation fluid causes sand bodies to enter the wellbore along the pores of oil and gas layers; Long, the formation pressure drops, the formation cement and rock are broken, and sand sinks in the wellbore; or the stimulation measures such as fracturing or acidification are used to destroy the rock mass structure and cause sand sinking; or other operating measures cause pressure imbalance in the formation and cause out of sand. Sand production in oil and gas wells will aff...

AI Technical Summary

Problems solved by technology

There are certain deficiencies in the traditional sand removal tools: in wells with dense sand and solidified wells, internal sand removal tools such as piston sand pumps cannot remove sand at all in deep wells, ultra-deep wells, and horizontal wells; Although external sand removal tools such as giant fishing cups can loosen the consolidated and dense sand settling and grinding, the amount of sand removal is extremely small and the operation cycle is long

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