Staged fracturing slide sleeve opening-closing device

Abstract

The invention relates to a staged fracturing device in the field of petroleum machinery, in particular to a staged fracturing slide sleeve opening-closing device, comprising an upper connector, an upper connection sleeve, a center tube, an upper fixing sleeve, a spring, an upper inner slide sleeve, an upper slide support, a connection rod, a slide sleeve opening-closing claw, a pin, a lower slidesupport, a lower fixing sleeve, a lower inner slide sleeve, a lower connection sleeve and a lower connector. The upper end of the upper connector is connected with a tubing; the lower end of the upperconnector is in threaded connection with the upper end of the upper connection sleeve; the lower end of the upper connection sleeve is in threaded connection with the upper end of the upper fixing sleeve; the right end of the upper fixing sleeve is provided with the upper slide support. In principle, elastic potential energy of the spring is stored and released under the action of a high-pressurefluid so that the slide sleeve opening-closing claw is extended and contracted, thereby opening or closing a fracturing slide sleeve. The staged fracturing slide sleeve opening-closing device has theadvantages that the staged fracturing slide sleeve opening-closing device is simple in structure and convenient to operate, can run stably and reliably, can meet the field requirements of various conditions for open-hole staged fracturing of a multi-stage slide sleeve of a horizontal well, and can provide full fracturing development for reservoirs.

Description

technical field [0001] The invention relates to a segmented fracturing device in the field of petroleum machinery, in particular to a segmented fracturing sliding sleeve switch device. Background technique [0002] The multi-stage sliding sleeve open hole staged fracturing technology for horizontal wells is often completed by presetting pipe string construction, one-time running, and continuous ball-dropping operations. It is widely used in directional wells and horizontal wells in shale gas and low-permeability production layers. Fracturing. However, with the popularization and application of this technology, the disadvantage of difficult subsequent reservoir stimulation has also been exposed. Due to the lack of a special device for switching sliding sleeves for segmental fracturing, when oil and gas wells produce water, formation water can easily enter the wellbore through the sliding sleeves. , interfere with the fracturing operation; in addition, for the section with in...

AI Technical Summary

Problems solved by technology

However, with the popularization and application of this technology, the disadvantage of difficult subsequent reservoir stimulation has also been exposed. Due to the lack of a special device for switching sliding sleeves for segmental fracturing, when oil and gas wells produce water, formation water can easily enter the wellbore through the sliding sleeves. , interfere with the fracturing operation; in addition, for the section with insufficient fracturing, the secondary fracturing cannot be realized through the switch of the sliding sleeve

Images