Title:
【発明の名称】坑井用管要素の結合方法および結合装置
Document Type and Number:
Japanese Patent JP2747084
Kind Code:
B2
Abstract:
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).
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Inventors:
UIRUHERUMUSU FUUBERUTSUSU PAURUSU MARII HEINEN
Application Number:
JP11569590A
Publication Date:
May 06, 1998
Filing Date:
May 01, 1990
Export Citation:
Assignee:
SHERU INTERN RISAACHI MAACHATSUPII BV
International Classes:
B23K20/12; E21B17/08; E21B19/16; E21B43/00; F16L13/02; (IPC1-7): E21B17/08
Attorney, Agent or Firm:
Yoshio Kawaguchi (2 outside)