Down-hole pumping ring and down-hole pumping device

Abstract

The invention discloses a down-hole pumping ring and a down-hole pumping device. The down-hole pumping ring is used for being arranged on the outer side face of a main body of a pumping piece and comprises a ring-shaped main body which is overall of a ring-shaped structure; the inner surface of one end of the ring-shaped main body is in a circular-table shape, and the ring-shaped main body sleevesthe outer side face of the main body of the pumping piece and is flush with the outer side face of the main body of the pumping piece; the inner surface of one end of the ring-shaped main body and the outer side face of the main body of the pumping piece form a circumferential groove, and the other end of the ring-shaped main body is fixedly connected with the main body of the pumping piece; andthe opening direction of the circumferential groove is opposite to the flowing direction of well liquid. When the flowing speed of the well liquid reaches a certain value, the well liquid enters the circumferential groove, the pressure of the interior of the circumferential groove is larger than the pressure of the exterior of the circumferential groove at the edge of the circumferential groove, and thus the pumping ring is spread towards the outer side at an opening of the circumferential groove; and the pushing area of a bridge plug is increased, and thus drilling fluid more effectively pushes a setting tool and the connected bridge plug.

Description

technical field [0001] The invention relates to the field of petroleum underground construction, in particular to an underground pumping ring and an underground pumping device. Background technique [0002] In oil and gas well staged fracturing operations, low pumping efficiency is often encountered when pumping bridge plugs. Due to the operating conditions, when a small outer diameter bridge plug is required, the gap between the bridge plug and the downhole casing is too large, and the drilling fluid flow area becomes larger. When the bridge plug is pumped, the force to push the bridge plug is reduced. This affects the speed of pumping the bridge plug, and ultimately increases the staged fracturing time of the oil and gas well. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a downhole pumping ring and a downhole pumping device for improving the pumping efficiency of downhole bridge plugs. [0004] The technic...

AI Technical Summary

Problems solved by technology

[0002] In oil and gas well staged fracturing operations, low pumping efficiency is often encountered when pumping bridge plugs

Due to the operating conditions, when a small outer diameter bridge plug is required, the gap between the bridge plug and the downhole casing is too large, and the drilling fluid flow area becomes larger. When the bridge plug is pumped, the force to push the bridge plug is reduced. This affects the speed at which the bridge plug is pumped, ultimately increasing the time it takes to stage a well for oil and gas wells

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