公开(公告)号：US20170226835A1

公开(公告)日：2017-08-10

申请号：US15502923

申请日：2015-08-10

Applicant: ENI S.P.A.

Inventor： Michela DE SIMONI ,  Gilberto TOFFOLO ,  Alessandro CERUTTI

IPC: E21B43/24

CPC classification number: E21B43/2401

Abstract: The present invention relates to a system for facilitating the extraction of hydrocarbons, in particular extraction by RF heating of high-viscosity hydrocarbons in situ by means of an antenna comprising a coaxial array of mode converters.

公开(公告)号：US20210404281A1

公开(公告)日：2021-12-30

申请号：US17288202

申请日：2019-10-23

Applicant: ENI S.P.A.

Inventor： Gilberto TOFFOLO ,  Andrea BIONDI ,  Paolo FERRARA

IPC: E21B31/00

Abstract: An unstuck system of stuck drill pipes of a drill string of a drilling apparatus adapted to drilled wells to extract fluids or mud includes a torsion coupling system adapted to disconnect an upper portion from a bottom portion including the stuck drill pipes of the drill string and to transfer a rotation to the unstuck system. The unstuck system includes at least an axial forced vibration generator including at least one axially movable element adapted to generate at least a vibration which is propagated to pipes of a portion free from being stuck, where the induced vibrations fall within a band of induced frequencies near or corresponding to a resonance frequency of the portion free from being stuck.