| UNITED STATES |
|---|
| SECURITIES AND EXCHANGE COMMISSION |
| Washington, D.C. 20549 |
NOTICE OF EFFECTIVENESS |
| Effective Date: | July 16, 2015 |
|---|---|
| Form: | S-4 |
| CIK: | 0000046765 |
|---|---|
| Company Name: | HELMERICH & PAYNE INC |
| File Number: | 333-205219 |
| CIK: | 0001305993 |
|---|---|
| Company Name: | Helmerich & Payne International Drilling Co. |
| File Number: | 333-205219-01 |