Uprighting and sand preventing integrated pipe column and operating method thereof

Abstract

The invention discloses an uprighting and sand preventing integrated pipe column which comprises a suspension head, automatic expansion uprighting nipples, automatic expansion sealed uprighting nipples, a screen pipe, a guide cone and sleeves. The suspension head adopts a structure of an inverted cone cylinder. An internal thread is formed in the inner wall of a conic cylinder extension pipe, and is used for being connected with a rod body of a drill rod. The root of the conic cylinder extension pipe is in threaded connection with the automatic expansion uprighting nipples. The automatic expansion sealed uprighting nipples are connected with the automatic expansion uprighting nipples in sequence through the sleeves. The automatic expansion sealed uprighting nipples are in threaded connection with the screen pipe, the automatic expansion sealed uprighting nipples and the guide cone in sequence. A vulcanized automatic expansion rubber cylinder is arranged at the peripheries of the automatic expansion uprighting nipples / the automatic expansion sealed uprighting nipples. The uprighting and sand preventing integrated pipe column has the beneficial effects that the problem that a conventional sand preventing pipe column is not centered and sealed, so that the sand preventing failure problem or the sand preventing invalidation problem is caused is solved, the stratum can be stabilized, hole collapse or sand flow is prevented, the sand preventing effect is good, the period of validity is long, and oil-water well abandonment is avoided.

Description

technical field [0001] The invention relates to the technical field of centralizers for oil and gas wells, in particular to a centralizing and sand-controlling integrated pipe string and an operating method thereof. Background technique [0002] Sand production in oil and water wells is very harmful: sand production may cause sand to bury oil layers or wellbore sand plugging, resulting in abnormal production or shutdown of oil and water wells; sand production will lead to increased wear of downhole and surface equipment; sand production will lead to wellbore sand washing and ground equipment cleaning. The increase of sand work will increase the production cost; sand production may also cause shortage of oil layer, collapse of well wall, aggravation of casing deformation and even scrapping of oil and water wells. [0003] With the extension of oilfield development time, problems such as casing corrosion, deformation, dislocation, and damage of oil and water wells are becoming...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a settling sand control integrated pipe string and its operation method, which can solve the problem of ineffective or inefficient sand control caused by uncentered and unsealed conventional sand control construction pipe strings.

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