Flexible first-time sand control sandblasting technique pipe

Abstract

The invention relates to the technical field of oilfield workover sand control operation, in particular to a flexible first-time sand control sandblasting technique pipe. Multiple slotted screens of the pipe are mutually connected through flexible connectors to form a slotted screen string, each flexible connector comprises a flexible connector lower adaptor and a flexible connector upper adaptor which are connected and are locked through a flexible connector locking screw, the lower end of the slotted screen string is connected with a ball seat with the lower end connected with a guiding shoe nib, the upper end of the slotted screen string is connected with a hanger body through the flexible connectors, a hanger sealing rubber sleeve and a rubber sleeve distance ring are sleeved on the hanger body, a compression rubber sleeve adaptor is disposed at the upper end of the rubber sleeve distance ring and is in screwed connection with the hanger body, and the upper end of the compression rubber sleeve adaptor is in screwed connection with a hanger spindle and fixed through a shear pin. By the technique pipe, first-time success rate of sand control of large-curvature wells is improved, sand control cost is lowered, sand control time effectiveness is improved, and production of sand control wells is resumed timely.

Description

Technical field: [0001] The invention relates to the technical field of oil field workover and sand control operations, in particular to a flexible sand control and sand washing primary process pipe string. Background technique: [0002] At present, in the process of oilfield development, directional wells, sidetracking wells, horizontal wells, and large-curvature oil wells are constantly increasing sand wells. Difficult problems in large curvature well sections. Sometimes after sand washing and well washing, the sand washing pipe string is raised, and the sand control pipe string is run into the sand settling problem, although it is only a few meters or 8-10m, causing the sand control pipe string to go down. If it is not in place, but the well cannot be completed, it will seriously affect the first-time success rate of sand control, operation timeliness and delay in production resumption. It is also necessary to run down the sand washing pipe string again to wash out a sma...

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of existing rigid sand control strings that are easy to get stuck in large curvature wells and requires multiple sand washing and lifting of sand control strings

Images