Seated sealing tool for preventing seated sealing in advance, and hanging technology for protecting open holes of packer

Abstract

The invention provides a seated sealing tool for preventing seated sealing in advance, and a hanging technology for protecting open holes of a packer, and relates to the technical field of oilfield completion. The seated sealing tool for preventing seated sealing in advance comprises a seated sealing assembly and a double release assembly which are sequentially connected, wherein a seated sealingpreventing member which can shear pins is arranged on the seated sealing assembly, and is connected with a pressure ring of the packer; and a locking pawl which can shear pins is arranged on the double release assembly, and is connected with the locking pawl. The hanging technology for protecting open holes of a packer comprises the following steps of tripping in a sand control string and a service string loading the seated sealing tool for preventing seated sealing in advance to a preset position; putting into a steel ball on the packer for performing seated sealing and performing seal inspection on the packer; performing positive rotation or annular space pressurizing on the service string, so that the seated sealing assembly and the packer are released; lifting the service string, performing pressurizing on the service string, shearing the ball seat, establishing a new positive cycle passage, and realizing large-displacement well flushing; continuing lifting the service string, closing a sliding bush, and verifying the sliding bush closing situation; and pulling out the service string. The technical effect of reducing the possibility that the seated sealing tool is subjected toseated sealing in advance is achieved.

Description

technical field [0001] The invention relates to the technical field of oilfield well completion, in particular to a setting tool for preventing early setting and an open-hole suspension process for protecting a packer. Background technique [0002] In the current open-hole independent screen sand control completion operation, a large diameter sand control packer is often used to hang the screen to complete the well, and the completion fluid and gel breaking fluid are replaced after the pipe string is in place. When the completion fluid is replaced before the well sliding sleeve and the packer are set, the packer rubber sleeve is eroded by the completion fluid and mud, and the packer rubber sleeve is often damaged, resulting in the packer being unable to seal safely. The existing sealing tools that cooperate with the packer have poor functional diversity, and the setting tool is a service tool that directly acts on the packer, and its importance in sand control operations is ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a setting tool that prevents early setting and a process for protecting the open hole suspension of the packer, so as to alleviate the technical problem that the setting tool is easy to set in advance in the prior art

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