System and method for increasing wall thickness on end of pipe o

Details System and method for increasing wall thickness on end of pipe o System and method for increasing wall thickness on end of pipe o

1981-11-02

1986-01-14

Arola, Dave W.

Pipe joints or couplings

Particular interface

Tapered

285382, 285383, 285390, 285392, 29421E, 72 56, 228107, F16L 2500

Patent

active

045642265

ABSTRACT:
A system and method for thickening the end of a pipe or rod for receiving tapered threads is disclosed. A metal sleeve is metallurgically bonded to the outer surface of the end portion of a well pipe by a high-energy impact of the sleeve colliding radially inward against the end of the well pipe. The impact is produced by the detonation of an explosive charge propagating uniformly around the sleeve. A castable metal having a substantially lower melting temperature than the melting temperature of the pipe is deposited within the pipe and is permitted to solidify in situ to form a core for absorbing the high-energy impact of the collision and for limiting the radial contraction of the pipe in order to preserve its inside diameter. A thread is machined along a tapered path which penetrates the metallurgically bonded interface of the sleeve and pipe.

REFERENCES:
patent: 273591 (1883-03-01), Patterson
patent: 609030 (1898-08-01), Keller
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patent: 1577591 (1926-03-01), Rieger
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patent: 3376633 (1968-04-01), Wesley
patent: 3434194 (1969-03-01), Whittaker et al.
patent: 3535767 (1965-10-01), Doherty, Jr.
patent: 4085951 (1978-04-01), Morris

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