Electric heating – Metal heating – By arc
Patent
1981-07-31
1984-02-14
Reynolds, B. A.
Electric heating
Metal heating
By arc
219 761, 219 7611, 219159, B23K 912, B23K 904
Patent
active
044319029
ABSTRACT:
An apparatus for applying a band of hardened metal around a portion of a drill collar in accordance with conventional MIG or TIG welding processes. The improved hardbanding system comprises an AC power source coupled to a water cooled, MIG or TIG welding torch assembly. A hydraulic pump is provided, coupled to the AC power source, for independently driving: (1) a mandril assembly for rotating the drill collar workpiece adjacent the torch assembly, (2) an elevation assembly for adjusting the height of the torch assembly and the mandril assembly; and (3) a pair of hydraulic jacks for lifting the drill collars off of standard pipe racks. The entire system is designed for mounting on the bed of a conventional two ton truck such that the system is easily transportable for on-site hardbanding.
REFERENCES:
patent: 3611541 (1971-10-01), Garret
patent: 4010346 (1977-03-01), Cecil et al.
patent: 4145593 (1979-03-01), Merrick et al.
patent: 4243727 (1981-01-01), Wisler et al.
patent: 4313046 (1982-01-01), Henry et al.
patent: 4314195 (1982-02-01), Muter
Jensen Allen R.
Nydegger Rick D.
Reynolds B. A.
Rocky Mountain Hardbanders, Inc.
Sigda Catherine M.
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