Turning – Lathe – Portable
Patent
1997-04-29
1998-12-29
Howell, Daniel W.
Turning
Lathe
Portable
82131, 82113, 451359, B23B 324, B23B 516
Patent
active
058529624
ABSTRACT:
Apparatus for reconditioning the seal shoulders of threaded tubular connections, whether of single or multiple seal shoulder configuration, which non-threadably engages the connection for alignment. For box connections, the apparatus has two circular plates disposed on a shaft, with a cutting surface on one face of each plate. The shaft is rotably and slidably disposed within two conical mandrels which non-threadably engage the threads of the box connection. The mandrels are spring biased toward one end of the apparatus. The apparatus is positioned with the mandrels within the box connection, bearing against the thread crests. The shaft is rotated and pushed toward the connection, bringing the cutting means into rotating contact with the seal shoulders of the connection, for resurfacing and alignment of the seal shoulders. For pin connections, the shaft is connected to a drum having circular plates at each end. The circular plates carry cutting surfaces. Two guide plates having conical thoroughbores are carried within the drum, and may rotate and slide linearly within the drum. The guide plates are spring biased toward one end of the drum. The pin connection is inserted into the drum so that the guide plates bear on the thread crests of the pin connection. A rotary driver rotates the shaft, the shaft is advanced toward the connection, and the circular plates having cutting surfaces disposed thereon are brought into rotating contact with the seal shoulders of the pin connection for resurfacing and alignment.
REFERENCES:
patent: 2092637 (1937-09-01), Brown
patent: 2528474 (1950-10-01), Moore
patent: 4665780 (1987-05-01), Plaquin et al.
patent: 5433130 (1995-07-01), Smith et al.
Howell Daniel W.
Lambert Jesse D.
Tsai Henry W. H.
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