Threaded release dissolvable bridge plug

Abstract

The invention belongs to the field of petroleum drilling and production equipment, A threaded release soluble bridge plug is provided, including the central tube, the central pipe is an axial hollow structure, A slip stop ring is sleeved on the outer wall of the central pipe from top to bottom, an upper slip, an upper cone, an upper back ring, a rubber cylinder, a lower back ring, a lower cone, alower slip and a guide shoe, wherein the upper part of the center pipe is provided with a variable diameter cavity for placing soluble balls, the lower end of the center pipe is threadably connected with the guide shoe, a release ring is arranged inside the guide shoe, the guide shoe is threadably connected with the release ring, and the upper end face of the release ring is in contact with the lower end face of the center pipe; The releasing ring is threadably connected with a releasing tool; The threaded release dissolvable bridge plug is soluble in electrolyte solution. As that screw threadrelease soluble bridge plug adopt the screw thread release mode, the screw thread release mechanism is simple and reliable, the release force value is accurate, and the insoluble substance left in the well can be reduced. At that same time, as long as the temperature of the screw thread release soluble bridge plug is above 50 DEG C, the dissolution condition of the bridge plug can be met.

Description

technical field [0001] The invention belongs to the field of oil drilling and production equipment, and in particular relates to a threaded dissolvable bridge plug. Background technique [0002] At present, soluble bridge plugs have been used more and more in the staged fracturing construction of unconventional oil and gas, but the current soluble bridge plugs on the market either use release plugs, which are complicated in structure and difficult to assemble on site. , or use the shear pin to lose the hand, the shear force value is unstable, which affects the subsequent construction. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and to provide a threaded hand throwing dissolvable bridge plug. The insoluble substances left in the well can be reduced, and at the same time, the dissolving bridge plug can satisfy the dissolving conditions of the bridge plug as long as the temperature i...

AI Technical Summary

Problems solved by technology

[0002] At present, dissolvable bridge plugs have been used more and more in the staged fracturing construction of unconventional oil and gas, but the dissolvable bridge plugs currently on the market either use release bolts, have complex structures, and are difficult to assemble on site , or use shear pins to lose hands, the shear force value is unstable, affecting subsequent construction

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