Recoverable cement extruding bridge plug

Abstract

The invention relates to a recoverable cement extruding bridge plug. A setting packer connector of the cement extruding bridge plug sleeves an unsetting connector; the setting packer connector and the unsetting connector are fixed by a setting packer shear pin; the setting packer connector and a slip cone body are connected through screw threads; a position limiting ring sleeves the slip cone body, is connected with the slip cone body through a step and is connected with a slip tube through screw threads; a slip and the slip cone body are glidingly connected through dovetail grooves; the outer circle surface of a lock ring and the inner circle surface of the setting packer connector are provided with mutually engaged screw threads and are provided with unidirectional buckles; the unsetting connector and a mandrel are fixed by the unsetting shear pin; the inner circle surface of a sealing sleeve is connected with the lower end of the mandrel through screw threads; a slip socket, a rubber tube and an isolation ring sleeve the sealing sleeve; a slide sleeve is positioned in an inner hole of the sealing sleeve; the sealing sleeve is sealed by an O-shaped ring; the upper end of the slide sleeve is provided with a jump ring structure; at the lower end of the slide sleeve, the downward motion of the slide sleeve is limited by the slide sleeve shear pin; a plug is connected with the screw threads of the sealing sleeve; and an anti-sticking layer is arranged on the outer surface of the plug. The recoverable cement extruding bridge plug has the advantages that the automatic opening of the slide sleeve is effectively controlled; and the cement counterflow is avoided.

Description

technical field [0001] The invention relates to the technical field of ash squeezing and plugging downhole in an oil field, in particular to an ash squeezing and plugging tool that can be taken out and recovered after the ash squeezing and plugging operation. Background technique [0002] Petroleum is one of the most tried energy sources in the industrial field today, and the exploration and development of petroleum is an important link in the field of petroleum technology. In the process of petroleum exploration and development, especially in the construction process of oil testing, downhole operation, oil and gas layer transformation, formation testing, injection-production layer adjustment, etc., it is often necessary to use downhole plugging tools to temporarily or For permanent plugging, sometimes, it is necessary to squeeze cement to plug the perforated well section or squeeze cement to plug the stringing groove outside the pipe for secondary cementing. Cement-squeezi...

AI Technical Summary

Problems solved by technology

The Chinese patent "Recoverable Bridge Plug" (Patent No.: 200520073237.9) discloses a recyclable bridge plug, which can be taken out and recycled after the ash squeezing operation is completed, but the performance of the tool is unstable, and during the setting process of the tool, slipping The sleeve is often opened under vibration, and the intubation can not control the switch of the sliding sleeve in the follow-up operation. After cementing, the cement is regurgitated onto the tool, the tool cannot be taken out, and the plugging fails

Images