Apparatus for processing body of internally-thickened alumium alloy drill pipe

Abstract

The invention discloses an apparatus for processing a body of an internally-thickened alumium alloy drill pipe, belonging to the technical field of drilling equipment. The apparatus comprises an operation platform and is characterized in that a front support seat, an outer support pipe and a rear support seat are sequentially arranged on the operation platform back and forth; a pipe fitting is erected between the front and rear support seats, penetrates through the outer support pipe and is coaxial with the outer support pipe; a rolling head is mounted on the wall of the pipe fitting and connected with a control mechanism which enables the rolling head to move in the radial direction; the pipe fitting is driven by a motor to rotate in the front and rear support seats; and the outer support pipe is connected with a first servo power device which enables the outer support pipe to move back and forth along the operation platform. The processing apparatus is capable of clamping the equal-diameter alumium alloy pipe to be processed in the outer support pipe, the opening of the rolling head is controlled by the control mechanism, the rolling head rolls the inner wall of the body of the alumium alloy pipe, and simultaneously, the outer support tube drives the body of the alumium alloy pipe to move back and forth, so that the body of the alumium alloy pipe is formed through once rolling, the continuous transition of the sections with different wall thicknesses of the alumium alloy pipe is guaranteed, and simultaneously, the shortcoming of uncontrollable deformation caused by heading is overcome.

Description

technical field [0001] The invention belongs to the technical field of drilling equipment, and in particular relates to equipment for processing an inner thickened aluminum alloy drill pipe body. Background technique [0002] Drill pipe is the main component of oil and gas extraction tools, and the drill pipe is composed of a pipe body and a threaded joint. The friction welding method is used between the threaded joint and the pipe body. In order to ensure the strength of the weld between the threaded joint and the pipe body, and to avoid stress concentration caused by sudden changes in the section, both ends of the pipe body must be thickened to form a joint with the wall of the threaded joint. Consistently thick thickened sections for a smooth transition to threaded joints. In this way, the pipe body forms a variable-section pipe with both ends thickened, and usually can adopt the methods of inner thickening, outer thickening and inner and outer thickening. [0003] On t...

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Problems solved by technology

[0004] If the thickening method commonly used for steel drill pipes is used to process this kind of aluminum alloy pipe with variable cross-section thickened at both ends, the deformation of the thickened section of the external thread is not large, and the deformation quality is easy to control, but the length of the thickened end of the internal thread is long Up to 1.3 meters, the amount of deformation is very large, and the deformation quality is difficult to control, which affects the forming quality of the aluminum alloy drill pipe body

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