摘要:
A pipe clamp for affixing to a pipe subjected to bending to minimize fatigue for a butt weld in the pipe. The pipe clamp includes an inside clamp segment and an outside clamp segment each having a semi-cylindrical shape, a first end and a second end. An inside surface of the inside clamp segment is substantially smooth for permitting slippage of an outside surface of the pipe with respect to the inside surface of the clamp segment. The outside clamp segment has an inside surface that defines a friction element. The friction element is for gripping an outside surface of the pipe to which the outside clamp segment is affixed. A clamp mechanism is provided for securing the inside clamp segment to the outside clamp segment.
摘要:
A method for joining well tubulars by a friction welding technique comprises the steps of lowering a first tubular element (3) partly into a well, positioning a welding ring (5) on top of this element (3), hoisting a second element (4) to a substantially vertical position above the welding ring (5) and rotating the welding ring (5) relative to the tubular elements (3 and 4) while deforming the welding ring (5) in radial sense such that sufficient frictional heat is generated to create a friction weld between the welding ring (5) and the tubular elements (3 and 4). A friction welding device for use in the method comprises means for fixing the tubular elements (3 and 4) in a substantially vertical and aligned position near the wellhead and means for rotating the welding ring (5) relative to the tubular elements (3 and 4).
摘要:
A method of impeding the propagation of a crack (16) in a structure (14) comprising: providing at least one compression member (40) at the structure (14) at a predetermined distance (50) from the crack (16) such that the structure (14) is in compression such that the stress at the crack (16) is reduced.
摘要:
A method for joining well tubulars by a friction welding technique comprises the steps of lowering a first tubular element (3) partly into a well, positioning a welding ring (5) on top of this element (3), hoisting a second element (4) to a substantially vertical position above the welding ring (5) and rotating the welding ring (5) relative to the tubular elements (3 and 4) while deforming the welding ring (5) in radial sense such that sufficient frictional heat is generated to create a friction weld between the welding ring (5) and the tubular elements (3 and 4). A friction welding device for use in the method comprises means for fixing the tubular elements (3 and 4) in a substantially vertical and aligned position near the wellhead and means for rotating the welding ring (5) relative to the tubular elements (3 and 4).
摘要:
Electric welding coupler (1) for the welding of pipes made of thermoplastic material or other weldable plastics comprising a cylindrical body (2) made of thermoplastic material or other weldable plastics, containing at least one welding element (3), wherein the welding element (3) is arranged close to the inner diameter of the cylindrical body (2), wherein the welding element (3) forms at least two welding zones (15), a contact (13) for feeding the electric current and at least one cavity (5), wherein the cavity (5) is arranged in the cylindrical body (2), wherein a reinforcing ring (6) is arranged around the outer circumference (7) respectively outer diameter of the cylindrical body (2).
摘要:
A pipe clamp for affixing to a pipe subjected to bending to minimize fatigue for a butt weld in the pipe. The pipe clamp includes an inside clamp segment and an outside clamp segment each having a semi-cylindrical shape, a first end and a second end. An inside surface of the inside clamp segment is substantially smooth for permitting slippage of an outside surface of the pipe with respect to the inside surface of the clamp segment. The outside clamp segment has an inside surface that defines a friction element. The friction element is for gripping an outside surface of the pipe to which the outside clamp segment is affixed. A clamp mechanism is provided for securing the inside clamp segment to the outside clamp segment.
摘要:
Zementrohrmanschette zur Korrosionshemmenden Abdeckung der Verbindung von aneinandergrenzenden Rohrstutzen (3), bestehend aus einem vor dem Erhärten flexiblen, Mörtelring und einem darauf flächig aufliegenden und zu einem Ring verbundenen Tragstreifen (2), der zahlreiche Öffnungen (21) aufweist, wobei der Mörtel in trockenem Zustand als ein pulverförmiges Gemisch aus Zement und Zuschlagstoffen in die Hohlräume eine Vliesstreifens (1) eingebracht ist, der auf dem Tragstreifen (2) aufliegt und der durch die Öffnungen des Tragstreifens (2) hindurch bewässerbar ist und der Tragstreifen aus wasserfestem Material besteht und in tangentialer Richtung mit höheren Kräften belastbar ist als in anderen Richtungen.