Recoverable fishbone yield increasing tool

Abstract

The invention discloses a recoverable fishbone yield increasing tool. The recoverable fishbone yield increasing tool comprises a shell, a first connector, a second connector, a sealing and pressing cylinder, a flexible drill rod and a power device, wherein the first connector and the second connector are arranged at the two ends of the shell, the sealing and pressing cylinder is arranged in the shell, the first connector and the second connector are in threaded connection with the shell through conventional drill rods, the sealing and pressing cylinder is limited in the shell through a pin andis in clearance fit with the shell, one end of the flexible drill rod extends out of the shell and is provided with a drill bit, and the other end of the flexible drill rod is rotationally connectedwith the power device. The tool can replace two operation processes of perforation and fracturing operation in the well completion process, all operation procedures are completed at a time, operationcan be completed only through an original drilling tool, other auxiliary devices are not needed to be additionally arranged, the operation procedures are simple, the operation time is short, operationsignals are obvious, drilling fluid pressure drop is adopted as a signal for operation completion of the tool, and other devices are not needed to be added for monitoring; and the tool can be completely recovered, and has great economic value and popularization value.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas drilling tools, in particular to a recyclable fishbone stimulation tool. Background technique [0002] As an emerging multi-lateral drilling technology, fishbone stimulation technology is usually used to replace the two operations of perforation and fracturing in the completion stage. Compared with perforation and fracturing operations, the recyclable fishbone stimulation tool involved in the patent of the present invention can provide a larger oil / gas production diameter, a larger oil and gas flow area, and better and more purposeful Significantly improve reservoir heterogeneity, natural fractures, high porosity / high permeability characteristics. At the same time, the fracturing fluid used in the fracturing operation may cause the fracturing fluid to leak into the groundwater body and cause pollution, and the use of high-explosive substances in the perforating operation has a high ri...

AI Technical Summary

Problems solved by technology

During the use of existing multi-branch drilling tools, especially after the completion of the multi-branch drilling tool operation, the tools are generally left at the bottom of the well, and the tools cannot be reused, which leads to an increase in operating costs, which in turn leads to an increase in well construction costs At the same time, it will also leave hidden dangers for oil / gas wells. The inner diameter of the oil / gas production string will become smaller due to the multi-branch drilling tools, which will affect the subsequent stimulation operations and the use of stimulation measures, thereby affecting the oil / gas production. For gas wells In other words, the drainage tool cannot be lowered to the bottom of the well, resulting in water flooding of the gas well, which affects the production and life of the gas well.

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