Openhole Anchor Flushing Hand Dropper and Its Application in Well Completion Construction

Abstract

In particular, the invention relates to an open-hole well completion tool and a well completion construction technology. Open-hole anchoring flushing type hand dropper, including upper joint upper joint, torque head, ball, inner sliding sleeve, mandrel, inner flushing pipe, ferrule, screen tube, pin, clamping teeth, sliding ring, shear nail, sliding ring , and is formed by connecting the above components. During construction, the screen pipe and the inner flushing pipe go downhole together. After the flushing construction is completed, the pressure ball is put in to anchor the dropper to the downhole, and the pressure is continuously applied, and the upper joint is lifted up to realize the upper joint, the ball, and the inner flushing. The pipe is pulled out together, and the screen remains in the well. The ferrule of the present invention has a unique design, so that small tools can be suspended in a large wellbore, such as a 90mm tool can be riveted in a 130mm wellbore, and the screen pipe and the inner flushing pipe go downhole together for flushing operations; The diameter of the borehole is expanded, and then the screen pipe is run, resulting in unsmooth construction and frequent rework, and in serious cases, the wellbore will be scrapped.

Description

technical field [0001] The invention relates to a tool for oil well development and an underground construction process, in particular to an open-hole well completion tool and a well completion construction process. Background technique [0002] Well completion refers to the process of connecting the bottom of the well with the oil layer in a certain structure after the open hole has been drilled to the designed depth. It is the last important link of the drilling work and the beginning of the oil recovery project, which is closely connected with the subsequent oil recovery, water injection and the development of the entire oil and gas field. The quality of oil well completion directly affects the production capacity and economic life of the oil well, and even relates to whether the entire oil field can be developed reasonably. [0003] The operation process is generally that after the well is drilled to the designed depth, the well needs to be flushed to flush the sand and...

AI Technical Summary

Problems solved by technology

However, during the flushing process, the phenomenon of borehole diameter expansion often occurs, resulting in unsmooth construction, frequent rework, and in serious cases, the borehole is scrapped

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