Electric heating – Metal heating – By arc
Patent
1998-08-06
1999-11-02
Mills, Gregory
Electric heating
Metal heating
By arc
B23K 1504
Patent
active
059775092
ABSTRACT:
Downhole oilfield tools often consist of complicated "blocks" that are small in diameter (typically 111/16-inch to 43/4-inch) and long (typically 2 to 10 feet). The invention describes a novel method of designing and manufacturing the "blocks" which significantly reduces the machining and manufacturing complexity of the part. After designing the "blocks" and machining them by conventional "easy access" metal-removal methods, the new manufacturing process disclosed herein uses a full penetration electron beam weld to join two "blocks" together to create a final piece that previously would have been made from a single monolithic piece requiring extremely difficult machining processes. A preferred embodiment utilizes a variable penetration welding procedure, i.e., a weld that varies the intensity of the electron beam as it is directed around the "blocks" to be welded together.
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Benedict, Gary F., Nontraditional Manufacturing Process 1987, Marcel Dekker, Inc., pp. 255-331.
Christian Steven L.
Jeffery Brigitte L.
Mills Gregory
Ryberg John J.
Schlumberger Technology Corporation
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