HELMERICH & PAYNE INC

UTICA AT 21ST ST, TULSA OK 74114, 9187425531
DRILLING OIL & GAS WELLS

1998 SEC Filings

HELMERICH & PAYNE INC, 10-K, 1998-12-28
HELMERICH & PAYNE INC, 10-Q, 1998-08-14
HELMERICH & PAYNE INC, 10-Q, 1998-05-14
HELMERICH & PAYNE INC, 10-Q, 1998-02-13
HELMERICH & PAYNE INC, SC 13G, 1998-02-11
HELMERICH & PAYNE INC, DEF 14A, 1998-01-27
HELMERICH & PAYNE INC, 8-K, 1998-01-08


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