Abstract: A method for joining metallic well tubulars to be lowered into a wellbore (4) comprises the steps of: a) providing a first well tubular (6) having an upper end surface (6a), and a second well tubular (7) having a lower end surface (7a); b) lowering the first well tubular (6) into the wellbore (4), leaving the upper end thereof outside the wellbore (4); c) setting the second well tubular (7) in an axially aligned position on the first well tubular (6), with the lower end surface (7a) of the second well tubular (7) set against the upper end surface (6a) of the first well tubular (6); d) keeping the first and second well tubulars (6, 7) in said axially aligned position; e) welding the upper end of the first well tubular (6) to the lower end of the second well tubular (7), forming a circumferential weld bead (WL) in a position corresponding to said upper and lower end surfaces (6a, 7a); and f) lowering into the wellbore (4) the first well tubular (6) and the second well tubular (7) welded together.

Abstract: A method for joining metallic well tubulars to be lowered into a wellbore (4) comprises the steps of: a) providing a first well tubular (6) having an upper end surface (6a), and a second well tubular (7) having a lower end surface (7a); b) lowering the first well tubular (6) into the wellbore (4), leaving the upper end thereof outside the wellbore (4); c) setting the second well tubular (7) in an axially aligned position on the first well tubular (6), with the lower end surface (7a) of the second well tubular (7) set against the upper end surface (6a) of the first well tubular (6); d) keeping the first and second well tubulars (6, 7) in said axially aligned position; e) welding the upper end of the first well tubular (6) to the lower end of the second well tubular (7), forming a circumferential weld bead (WL) in a position corresponding to said upper and lower end surfaces (6a, 7a); and f) lowering into the wellbore (4) the first well tubular (6) and the second well tubular (7) welded together.

Abstract: An inspection apparatus (100) for monitoring the structural integrity of a pipeline (101) comprising a central electromagnetic device (102) suitable for generating a magnetic field (106); a pair of magnetic conveyors (103?, 103?) connected to the central electromagnetic device (102) suitable for conveying the magnetic field (106) to the wall of the pipeline (101); a system of sensors (104) for revealing the magnetic field (106) conveyed on the pipeline (101); electric means (105) for feeding the inspection apparatus (100) and acquiring and storing data relating to the magnetic field (106) revealed; wherein said central electromagnetic device (102) is divided into various ferromagnetic elements (107) held together by a casing (109) made of polymeric material suitable for degrading after prolonged contact with a mixture of hydrocarbons. Method wherein an inspection apparatus according to the present invention is used for monitoring the structural integrity of a pipeline (101).

Abstract: Described herein is a tubular apparatus for making rigid tubular structures, comprising a flexible cylindrical wall (11, 11?) defining inside it a hollow passage (19), and suited for being wound, in particular on a spool, and continuously laid for use. According to the invention, said cylindrical wall (11, 11?) comprises a fabric (12, 13, 15, 12?, 13?, 15?) comprising inside it at least one gap (14;14?), which develops in the axial direction of said cylindrical wall (11, 11?), said fabric (12, 13, 15; 12?, 13?, 15?) comprising means suitable for operating under traction (15, 15?) when present within said at least one gap (14; 14?) is a fluid (20), injected under pressure for stiffening the tubular apparatus (10; 10?).

Abstract: An inspection apparatus (100) for monitoring the structural integrity of a pipeline (101) comprising a superconducting electromagnet (102) suitable for generating a magnetic field (106); a cryostat (103) suitable for containing and preserving said superconducting electromagnet (102) at a low temperature; at least two magnetic conveyors (104?, 104?) connected at opposite ends of the cryostat (103) suitable for conveying the magnetic field (106) generated by the superconducting electromagnet (102) to the wall of the pipeline (101) and facilitating the closing of a magnetic circuit; at least one sensor system (105) for revealing the intensity of the magnetic field (106). A method for monitoring the structural integrity of a pipeline (101) using an inspection apparatus (100) according to the present invention.

Abstract: An inspection apparatus (100) for monitoring the structural integrity of a pipeline (101) comprising a superconducting electromagnet (102) suitable for generating a magnetic field (106); a cryostat (103) suitable for containing and preserving said superconducting electromagnet (102) at a low temperature; at least two magnetic conveyors (104?, 104?) connected at opposite ends of the cryostat (103) suitable for conveying the magnetic field (106) generated by the superconducting electromagnet (102) to the wall of the pipeline (101) and facilitating the closing of a magnetic circuit; at least one sensor system (105) for revealing the intensity of the magnetic field (106). A method for monitoring the structural integrity of a pipeline (101) using an inspection apparatus (100) according to the present invention.

Abstract: An inspection apparatus (100) for monitoring the structural integrity of a pipeline (101) comprising a central electromagnetic device (102) suitable for generating a magnetic field (106); a pair of magnetic conveyors (103?, 103?) connected to the central electromagnetic device (102) suitable for conveying the magnetic field (106) to the wall of the pipeline (101); a system of sensors (104) for revealing the magnetic field (106) conveyed on the pipeline (101); electric means (105) for feeding the inspection apparatus (100) and acquiring and storing data relating to the magnetic field (106) revealed; wherein said central electromagnetic device (102) is divided into various ferromagnetic elements (107) held together by a casing (109) made of polymeric material suitable for degrading after prolonged contact with a mixture of hydrocarbons. Method wherein an inspection apparatus according to the present invention is used for monitoring the structural integrity of a pipeline (101).

Abstract: Described herein is a tubular apparatus for making rigid tubular structures, comprising a flexible cylindrical wall (11, 11?) defining inside it a hollow passage (19), and suited for being wound, in particular on a spool, and continuously laid for use. According to the invention, said cylindrical wall (11, 11?) comprises a fabric (12, 13, 15, 12?, 13?, 15?) comprising inside it at least one gap (14;14?), which develops in the axial direction of said cylindrical wall (11, 11?), said fabric (12, 13, 15; 12?, 13?, 15?) comprising means suitable for operating under traction (15, 15?) when present within said at least one gap (14; 14?) is a fluid (20), injected under pressure for stiffening the tubular apparatus (10; 10?).

Abstract: Described herein is a tubular apparatus for the continuous completion of wells for hydrocarbons, of the type comprising a flexible cylindrical wall (11; 11?) defining inside it a hollow passage (19) suitable for being wound, in particular on a spool, and laid for use in the step of completion of a drilling well. According to the invention, said cylindrical wall (11; 11?) comprises a fabric (12, 13, 15; 12?, 13?, 15?) including inside it at least one gap (14; 14?), which develops in the axial direction of said cylindrical wall (11), said fabric (12, 13, 15; 12?, 13?, 15?) comprising means suitable for operating under traction (15; 15?) when within said at least one gap (14; 14?) a pressurized fluid (20) is present injected for stiffening the tubular apparatus (10; 10?).