----

----

|                                                                       |                                                |
|----------------------------------------------------------------------------|-----------------------------------------------------|
|           Delaware       | 58-1550825                 |
| (State or other jurisdiction of incorporation or organization)   |  (I.R.S. Employer Identification Number)  |

| Large accelerated filer o                                                 | Accelerated filer x         |
|---------------------------------------------------------------------------|-----------------------------|
| Non-accelerated filer o(Do not check if a smaller reporting company) | Smaller reporting company o |

----

| Part I. Financial Information         | PageNo.                                                                                               |
|---------------------------------------|-------------------------------------------------------------------------------------------------------|
| Item 1.                               | Financial Statements (Unaudited)                                                                      |   |
|                                  | Consolidated Balance Sheets –As of March 31, 2011 and December 31, 2010                         |  3 |
|                                  |                                                                                                  |   |
|                                  | Consolidated Statements of Operations –For the three months ended March 31, 2011 and 2010       |  4 |
|                                  |                                                                                                  |   |
|                                  | Consolidated Statement of Stockholders’ Equity –For the three months ended March 31, 2011 |  5 |
|                                  |                                                                                                  |   |
|                                  | Consolidated Statements of Cash Flows –For the three months ended March 31, 2011 and 2010       |  6 |
|                                  |                                                                                                  |   |
|                                  | Notes to Consolidated Financial Statements                                                            | 7 – 18 |
|                                  |                                                                                                  |   |
| Item 2.                               | Management’s Discussion and Analysis of Financial Condition and Results of Operations           | 19 – 28 |
|                                  |                                                                                                  |   |
| Item 3.                               | Quantitative and Qualitative Disclosures about Market Risk                                            | 28 |
|                                  |                                                                                                  |   |
| Item 4.                               | Controls and Procedures                                                                               | 29 |
|                                  |                                                                                                  |   |
| Part II.  Other Information |                                                                                                  |
| Item 1.                               | Legal Proceedings                                                                                     | 30 |
|                                  |                                                                                                  |   |
|    Item 1A.            | Risk Factors                                                                                          | 30 |
|                                  |                                                                                                  |   |
| Item 2.                               | Unregistered Sales of Equity Securities and Use of Proceeds                                           | 30 |
|                                  |                                                                                                  |   |
| Item 3.                               | Defaults upon Senior Securities                                                                       | 31 |
|                                  |                                                                                                  |   |
| Item 4.                               | (Removed and Reserved)                                                                                | 31 |
|                                  |                                                                                                  |   |
| Item 5.                               | Other Information                                                                                     | 31 |
|                                  |                                                                                                  |   |
| Item 6.                               | Exhibits                                                                                              | 32 |
|                                  |                                                                                                  |   |
| Signatures                            |                                                                                                  | 33 |

----

|                                             |   | March 31, |    |   | December 31, |   |
|--------------------------------------------------|--------|-----------|---------|--------|--------------|--------|
|                                             |   | 2011      |    |   | 2010         |   |
| ASSETS                                           |   |      |    |   | (Note 1)     |   |
|                                             |   |      |    |   |         |   |
| Cash and cash equivalents                        |   | $         | 11,678  |   |         | $      | 9,035 |   |
| Accounts receivable, net                         |   |      | 357,008 |   |         |   | 294,002 |   |
| Inventories                                      |   |      | 71,291  |   |         |   | 64,059 |   |
| Deferred income taxes                            |   |      | 7,550   |   |         |   | 7,426 |   |
| Income taxes receivable                          |   |      | 736     |   |         |   | 17,251 |   |
| Prepaid expenses and other current assets        |   |      | 7,751   |   |         |   | 6,905 |   |
| Total current assets                             |   |      | 456,014 |   |         |   | 398,678 |   |
| Property, plant and equipment, net               |   |      | 504,776 |   |         |   | 453,017 |   |
| Goodwill                                         |   |      | 24,093  |   |         |   | 24,093 |   |
| Other assets                                     |   |      | 12,240  |   |         |   | 12,083 |   |
| Total assets                                     |   | $         | 997,123 |   |         | $      | 887,871 |   |
|                                             |   |      |    |   |         |   |   |   |
| LIABILITIES AND STOCKHOLDERS’ EQUITY       |   |      |    |   |         |   |   |   |
|                                             |   |      |    |   |         |   |   |   |
| Accounts payable                                 |   | $         | 97,341  |   |         | $      | 78,743 |   |
| Accrued payroll and related expenses             |   |      | 22,999  |   |         |   | 23,881 |   |
| Accrued insurance expenses                       |   |      | 5,924   |   |         |   | 5,141 |   |
| Accrued state, local and other taxes             |   |      | 4,659   |   |         |   | 2,988 |   |
| Income taxes payable                             |   |      | 26,297  |   |         |   | 5,788 |   |
| Other accrued expenses                           |   |      | 694     |   |         |   | 963 |   |
| Total current liabilities                        |   |      | 157,914 |   |         |   | 117,504 |   |
| Long-term accrued insurance expenses             |   |      | 8,296   |   |         |   | 8,489 |   |
| Notes payable to banks                           |   |      | 149,800 |   |         |   | 121,250 |   |
| Long-term pension liabilities                    |   |      | 18,698  |   |         |   | 18,397 |   |
| Other long-term liabilities                      |   |      | 1,711   |   |         |   | 2,448 |   |
| Deferred income taxes                            |   |      | 78,992  |   |         |   | 80,888 |   |
| Total liabilities                                |   |      | 415,411 |   |         |   | 348,976 |   |
| Common stock                                     |   |      | 14,804  |   |         |   | 14,818 |   |
| Capital in excess of par value                   |   |      | -       |   |         |   | 6,460 |   |
| Retained earnings                                |   |      | 576,112 |   |         |   | 527,150 |   |
| Accumulated other comprehensive loss             |   |      | (9,204  | )      |         |   | (9,533 | ) |
| Total stockholders’ equity                 |   |      | 581,712 |   |         |   | 538,895 |   |
| Total liabilities and stockholders’ equity |   | $         | 997,123 |   |         | $      | 887,871 |   |

----

|                                         |   |                         |    |   |   |   |
|----------------------------------------------|--------|------------------------------|---------|--------|--------|--------|
|                                         |   | Three months ended March 31, |    |
|                                         |   | 2011                         |    |   | 2010   |   |
|                                         |   |                         |    |   |   |   |
| Revenues                                     |   | $                            | 381,761 |   |   | $      | 213,144 |   |
| Cost of revenues                             |   |                         | 201,252 |   |   |   | 129,614 |   |
| Selling, general and administrative expenses |   |                         | 36,057  |   |   |   | 27,837 |   |
| Depreciation and amortization                |   |                         | 39,537  |   |   |   | 32,261 |   |
| (Gain) loss on disposition of assets, net    |   |                         | (1,411  | )      |   |   | 864 |   |
| Operating profit                             |   |                         | 106,326 |   |   |   | 22,568 |   |
| Interest expense                             |   |                         | (1,079  | )      |   |   | (541 | ) |
| Interest income                              |   |                         | 4       |   |   |   | 23 |   |
| Other income, net                            |   |                         | 334     |   |   |   | 403 |   |
| Income before income taxes                   |   |                         | 105,585 |   |   |   | 22,453 |   |
| Income tax provision                         |   |                         | 40,061  |   |   |   | 9,053 |   |
| Net income                                   |   | $                            | 65,524  |   |   | $      | 13,400 |   |
|                                         |   |                         |    |   |   |   |   |   |
| Earnings per share                           |   |                         |    |   |   |   |   |   |
| Basic                                        |   | $                            | 0.45    |   |   | $      | 0.09 |   |
| Diluted                                      |   | $                            | 0.45    |   |   | $      | 0.09 |   |
|                                         |   |                         |    |   |   |   |   |   |
| Dividends per share                          |   | $                            | 0.07    |   |   | $      | 0.04 |   |
|                                         |   |                         |    |   |   |   |   |   |
| Average shares outstanding                   |   |                         |    |   |   |   |   |   |
| Basic                                        |   |                         | 145,015 |   |   |   | 144,797 |   |
| Diluted                                      |   |                         | 147,030 |   |   |   | 146,174 |   |

----

|                                             |   |          |   |   |         |    |          |       |   |   |          |   |   |     |    |   | Accumulated   |    |          |   |   |
|--------------------------------------------------|--------|---------------|--------|--------|--------------|---------|---------------|------------|--------|--------|---------------|--------|--------|----------|---------|--------|---------------|---------|---------------|--------|--------|
|                                             |   |          |   |   | Common Stock |    |          | Capital in |   |   |          |   |   | Other    |    |   |          |    |
|                                             |   | Comprehensive |   |   |         |    |          |       |   |   | Excess of     |   |   | Retained |    |   | Comprehensive |    |          |   |   |
|                                             |   | Income (Loss) |   |   | Shares       |    |          | Amount     |   |   | Par Value     |   |   | Earnings |    |   | Loss          |    |          | Total  |   |
| Balance, December 31, 2010                       |   |          |   |   |         | 148,176 |          |       | $      | 14,818 |          |   | $      | 6,460    |    |   | $             | 527,150 |          |   | $      | (9,533 | ) |   | $ | 538,895 |   |
| Stock issued for stock incentive plans, net |   |          |   |   |         | 870     |          |       |   | 87     |          |   |   | 2,478    |    |   |          | — |          |   |   | — |   |   |   | 2,565 |   |
| Stock purchased and retired                      |   |          |   |   |         | (1,009  | )             |       |   | (101   | )             |   |   | (11,216  | )       |   |          | (6,208  | )             |   |   | — |   |   |   | (17,525 | ) |
| Net income                                       |   | $             | 65,524 |   |         |    | —       |       |   |   | —       |   |   |     | — |   |          |    | 65,524        |   |   |   | — |   |   |   | 65,524 |   |
| Pension adjustment, net of taxes                 |   |          | 74     |   |         |    | —       |       |   |   | —       |   |   |     | — |   |          |    | —       |   |   |   | 74 |   |   |   | 74 |   |
| Cash flow hedge, net of taxes                    |   |          | 132    |   |         |    | —       |       |   |   | —       |   |   |     | — |   |          |    | —       |   |   |   | 132 |   |   |   | 132 |   |
| Foreign currency translation, net of taxes       |   |          | 103    |   |         |    | —       |       |   |   | —       |   |   |     | — |   |          |    | —       |   |   |   | 103 |   |   |   | 103 |   |
| Unrealized gain on securities, net of taxes      |   |          | 20     |   |         |    | —       |       |   |   | —       |   |   |     | — |   |          |    | —       |   |   |   | 20 |   |   |   | 20 |   |
| Comprehensive income                             |   | $             | 65,853 |   |         |    |          |       |   |   |          |   |   |     |    |   |          |    |          |   |   |   |   |   |   |   |   |   |
| Dividends declared                               |   |          |   |   |         |    | —       |       |   |   | —       |   |   |     | — |   |          |    | (10,354       | )      |   |   | — |   |   |   | (10,354 | ) |
| Excess tax benefits for share-based payments     |   |          |   |   |         |    |  — |       |   |   |  — |   |   |     | 2,278   |   |          |    |  — |   |   |   |  — |   |   |   |  2,278 |   |
| Balance, March 31, 2011                          |   |          |   |   |         |    | 148,037       |       |   | $      | 14,804        |   |   | $        | -       |   |          | $       | 576,112       |   |   |  $ | (9,204 | ) |   | $ | 581,712 |   |

----

|                                                                                         |   |                         |     |   |   |   |
|----------------------------------------------------------------------------------------------|--------|------------------------------|----------|--------|--------|--------|
|                                                                                         |   | Three months ended March 31, |     |
|                                                                                         |   | 2011                         |     |   | 2010   |   |
| OPERATING ACTIVITIES                                                                         |   |                         |     |   |   |   |
| Net income                                                                                   |   | $                            | 65,524   |   |   | $      | 13,400 |   |
| Adjustments to reconcile net income to net cash provided by (used for) operating activities: |   |                         |     |   |   |   |   |   |
| Depreciation, amortization and other non-cash charges                                        |   |                         | 39,249   |   |   |   | 32,252 |   |
| Stock-based compensation expense                                                             |   |                         | 2,215    |   |   |   | 1,241 |   |
| (Gain) loss on disposition of assets, net                                                    |   |                         | (1,411   | )      |   |   | 864 |   |
| Deferred income tax benefit                                                                  |   |                         | (2,210   | )      |   |   | (3,646 | ) |
| Excess tax benefits for share-based payments                                                 |   |                         | (2,278   | )      |   |   | (236 | ) |
| Changes in current assets and liabilities:                                                   |   |                         |     |   |   |   |   |   |
| Accounts receivable                                                                          |   |                         | (62,909  | )      |   |   | (68,891 | ) |
| Income taxes receivable                                                                      |   |                         | 18,793   |   |   |   | 10,864 |   |
| Inventories                                                                                  |   |                         | (7,218   | )      |   |   | (2,281 | ) |
| Prepaid expenses and other current assets                                                    |   |                         | (903     | )      |   |   | 996 |   |
| Accounts payable                                                                             |   |                         | 15,438   |   |   |   | (1,345 | ) |
| Income taxes payable                                                                         |   |                         | 20,509   |   |   |   | 917 |   |
| Accrued payroll and related expenses                                                         |   |                         | (882     | )      |   |   | 3,546 |   |
| Accrued insurance expenses                                                                   |   |                         | 783      |   |   |   | 371 |   |
| Accrued state, local and other taxes                                                         |   |                         | 1,671    |   |   |   | 921 |   |
| Other accrued expenses                                                                       |   |                         | (69      | )      |   |   | 136 |   |
| Changes in working capital                                                                   |   |                         | (14,787  | )      |   |   | (54,766 | ) |
| Changes in other assets and liabilities:                                                     |   |                         |     |   |   |   |   |   |
| Pension liabilities                                                                          |   |                         | 417      |   |   |   | 821 |   |
| Accrued insurance expenses                                                                   |   |                         | (193     | )      |   |   | (348 | ) |
| Other non-current assets                                                                     |   |                         | (157     | )      |   |   | (339 | ) |
| Other non-current liabilities                                                                |   |                         | (737     | )      |   |   | (697 | ) |
| Net cash provided by (used for) operating activities                                         |   |                         | 85,632   |   |   |   | (11,454 | ) |
|                                                                                         |   |                         |     |   |   |   |   |   |
| INVESTING ACTIVITIES                                                                         |   |                         |     |   |   |   |   |   |
| Capital expenditures                                                                         |   |                         | (92,318  | )      |   |   | (10,368 | ) |
| Proceeds from sale of assets                                                                 |   |                         | 6,030    |   |   |   | 2,097 |   |
| Net cash used for investing activities                                                       |   |                         | (86,288  | )      |   |   | (8,271 | ) |
|                                                                                         |   |                         |     |   |   |   |   |   |
| FINANCING ACTIVITIES                                                                         |   |                         |     |   |   |   |   |   |
| Payment of dividends                                                                         |   |                         | (10,354  | )      |   |   | (3,936 | ) |
| Borrowings from notes payable to banks                                                       |   |                         | 190,300  |   |   |   | 86,650 |   |
| Repayments of notes payable to banks                                                         |   |                         | (161,750 | )      |   |   | (62,650 | ) |
| Excess tax benefits for share-based payments                                                 |   |                         | 2,278    |   |   |   | 236 |   |
| Cash paid for common stock purchased and retired                                             |   |                         | (17,499  | )      |   |   | (1,269 | ) |
| Proceeds received upon exercise of stock options                                             |   |                         | 324      |   |   |   | 26 |   |
| Net cash provided by financing activities                                                    |   |                         | 3,299    |   |   |   | 19,057 |   |
|                                                                                         |   |                         |     |   |   |   |   |   |
| Net increase (decrease) in cash and cash equivalents                                         |   |                         | 2,643    |   |   |   | (668 | ) |
| Cash and cash equivalents at beginning of period                                             |   |                         | 9,035    |   |   |   | 4,489 |   |
| Cash and cash equivalents at end of period                                                   |   | $                            | 11,678   |   |   | $      | 3,821 |   |

----

| 1. | GENERAL |
|----|---------|

| 2. | REVENUES |
|----|----------|

----

| 3. | RECENT ACCOUNTING PRONOUNCEMENTS |
|----|----------------------------------|

| 4. | EARNINGS PER SHARE |
|----|--------------------|

----

|   |                                                 |   | Three months endedMarch 31, |    |
|--------|------------------------------------------------------|--------|-----------------------------|---------|
|   | (In thousands except per share data )                |   | 2011                        |    |   | 2010 |   |
|   | Net income available for stockholders:               |   | $                           | 65,524  |   |   | $ | 13,400 |   |
|   | Less:  Dividends paid                      |   |                        |    |   |   |   |   |   |
|   |    Common stock                       |   |                        | (10,171 | ) |   |   | (3,865 | ) |
|   |    Restricted shares of common stock  |   |                        | (183    | ) |   |   | (71 | ) |
|   | Undistributed earnings                               |   | $                           | 55,170  |   |   | $ | 9,464 |   |
|   |                                                 |   |                        |    |   |   |   |   |   |
|   | Allocation of undistributed earnings:                |   |                        |    |   |   |   |   |   |
|   |    Common stock                       |   | $                           | 54,012  |   |   | $ | 9,250 |   |
|   |    Restricted shares of common stock  |   |                        | 1,158   |   |   |   | 214 |   |
|   |                                                 |   |                        |    |   |   |   |   |   |
|   | Basic shares outstanding:                            |   |                        |    |   |   |   |   |   |
|   |    Common stock                       |   |                        | 141,942 |   |   |   | 141,566 |   |
|   |    Restricted shares of common stock  |   |                        | 3,073   |   |   |   | 3,231 |   |
|   |                                                 |   |                        | 145,015 |   |   |   | 144,797 |   |
|   | Diluted shares outstanding:                          |   |                        |    |   |   |   |   |   |
|   |    Common stock                       |   |                        | 141,942 |   |   |   | 141,566 |   |
|   |    Dilutive effect of options         |   |                        | 2,015   |   |   |   | 1,377 |   |
|   |                                                 |   |                        | 143,957 |   |   |   | 142,943 |   |
|   |    Restricted shares of common stock  |   |                        | 3,073   |   |   |   | 3,231 |   |
|   |                                                 |   |                        | 147,030 |   |   |   | 146,174 |   |
|   | Basic earnings per share:                       |   |                        |    |   |   |   |   |   |
|   |   Common stock:                            |   |                        |    |   |   |   |   |   |
|   |      Distributed earnings   |   | $                           | 0.07    |   |   | $ | 0.03 |   |
|   |      Undistributed earnings |   |                        | 0.38    |   |   |   | 0.06 |   |
|   |                                                 |   | $                           | 0.45    |   |   | $ | 0.09 |   |
|   |   Restricted shares of common stock:       |   |                        |    |   |   |   |   |   |
|   |      Distributed earnings   |   | $                           | 0.06    |   |   | $ | 0.02 |   |
|   |      Undistributed earnings |   |                        | 0.38    |   |   |   | 0.07 |   |
|   |                                                 |   | $                           | 0.44    |   |   | $ | 0.09 |   |
|   | Diluted earnings per share:                     |   |                        |    |   |   |   |   |   |
|   |   Common Stock:                            |   |                        |    |   |   |   |   |   |
|   |      Distributed earnings   |   | $                           | 0.07    |   |   | $ | 0.03 |   |
|   |      Undistributed earnings |   |                        | 0.38    |   |   |   | 0.06 |   |
|   |                                                 |   | $                           | 0.45    |   |   | $ | 0.09 |   |

----

| 5. | COMPREHENSIVE INCOME |
|----|----------------------|

|                                        |   | Three months endedMarch 31, |   |
|---------------------------------------------|--------|-----------------------------|--------|
| (In thousands)                              |   | 2011                        |   |   | 2010 |   |
| Net income as reported                      |   | $                           | 65,524 |   |   | $ | 13,400 |   |
| Pension adjustment, net of taxes            |   |                        | 74     |   |   |   | - |   |
| Cash flow hedge, net of taxes               |   |                        | 132    |   |   |   | (93 | ) |
| Foreign currency translation, net of taxes  |   |                        | 103    |   |   |   | 102 |   |
| Unrealized gain on securities, net of taxes |   |                        | 20     |   |   |   | 82 |   |
| Comprehensive income                        |   | $                           | 65,853 |   |   | $ | 13,491 |   |

| 6. | STOCK-BASED COMPENSATION |
|----|--------------------------|

|   |              |   |               |   |   |   |   |
|--------|-------------------|--------|--------------------|--------|--------|--------|--------|
|   |              |   | Three months ended |   |
|   |              |   | March 31,          |   |
|   | (in thousands)    |   | 2011               |   |   | 2010   |   |
|   |              |   |               |   |   |   |   |
|   | Pre-tax expense   |   | $                  | 2,215  |   |   | $      | 1,241 |   |
|   |              |   |               |   |   |   |   |   |   |
|   | After tax expense |   |               | 1,407  |   |   |   | 788 |   |

----

|   |                                          |   | Shares |      |   | Weighted Average Exercise Price |   |   | Weighted Average Remaining Contractual Life |   |       | AggregateIntrinsic Value |   |
|--------|-----------------------------------------------|--------|--------|-----------|--------|---------------------------------|--------|--------|---------------------------------------------|--------|------------|--------------------------|--------|
|   | Outstanding at December 31, 2010              |   |   | 1,070,388 |   |                            | $      | 2.26   |                                        |   | 1.23 years |                     |   |   |   |   |
|   | Granted                                       |   |   | -         |   |                            |   | -      |                                        |   |       | N/A                      |   |   |   |   |   |
|   | Exercised                                     |   |   | (144,603  | )      |                            |   | 2.42   |                                        |   |       | N/A                      |   |   |   |   |   |
|   | Forfeited                                     |   |   | -         |   |                            |   | -      |                                        |   |       | N/A                      |   |   |   |   |   |
|   | Expired                                       |   |   | -         |   |                            |   | -      |                                        |   |       | N/A                      |   |   |   |   |   |
|   | Outstanding and exercisable at March 31, 2011 |   |   | 925,783   |   |                            | $      | 2.26   |                                        |   | 1.06 years |                     |   | $ | 21,349,000 |   |

|   |                                   |   | Shares |      |   | Weighted AverageGrant-Date FairValue |   |
|--------|----------------------------------------|--------|--------|-----------|--------|--------------------------------------|--------|
|   | Non-vested shares at December 31, 2010 |   |   | 3,007,353 |   |                                 | $      | 7.58 |   |
|   | Granted                                |   |   | 740,500   |   |                                 |   | 17.39 |   |
|   | Vested                                 |   |   | (626,281  | )      |                                 |   | 7.73 |   |
|   | Forfeited                              |   |   | (15,300   | )      |                                 |   | 7.42 |   |
|   | Non-vested shares at March 31, 2011    |   |   | 3,106,273 |   |                                 | $      | 9.79 |   |

----

| 7. | BUSINESS SEGMENT INFORMATION |
|----|------------------------------|

----

|   |                                      |   | Three months ended March 31, |    |
|--------|-------------------------------------------|--------|------------------------------|---------|
|   |                                      |   | 2011                         |    |   | 2010 |   |
|   |                                      |   | (in thousands)               |    |
|   | Revenues:                                 |   |                         |    |   |   |   |
|   | Technical services                        |   | $                            | 349,402 |   |   | $ | 191,403 |   |
|   | Support services                          |   |                         | 32,359  |   |   |   | 21,741 |   |
|   | Total revenues                            |   | $                            | 381,761 |   |   | $ | 213,144 |   |
|   | Operating Profit:                         |   |                         |    |   |   |   |   |   |
|   | Technical services                        |   | $                            | 99,916  |   |   | $ | 24,958 |   |
|   | Support services                          |   |                         | 9,935   |   |   |   | 1,910 |   |
|   | Corporate expenses                        |   |                         | (4,936  | ) |   |   | (3,436 | ) |
|   | Gain/(loss) on disposition of assets, net |   |                         | 1,411   |   |   |   | (864 | ) |
|   | Total operating profit                    |   | $                            | 106,326 |   |   | $ | 22,568 |   |
|   | Other income, net                         |   |                         | 334     |   |   |   | 403 |   |
|   | Interest expense                          |   |                         | (1,079  | ) |   |   | (541 | ) |
|   | Interest income                           |   |                         | 4       |   |   |   | 23 |   |
|   | Income before income taxes                |   | $                            | 105,585 |   |   | $ | 22,453 |   |

| Three months ended March 31, 2011     |   | Technical Services |    |   | Support Services |   |    | Corporate |   |   | Total  |   |
|---------------------------------------|--------|--------------------|---------|--------|------------------|--------|---------|-----------|--------|--------|--------|--------|
| (in thousands)                        |   |               |    |   |             |   |    |      |   |   |   |   |
|                                  |   |               |    |   |             |   |    |      |   |   |   |   |   |   |   |   |
| Identifiable assets at March 31, 2011 |   | $                  | 790,033 |   |             | $      | 159,477 |      |   | $      | 47,613 |   |   | $ | 997,123 |   |
|                                  |   |               |    |   |             |   |    |      |   |   |   |   |   |   |   |   |
| Capital expenditures                  |   |               | 81,622  |   |             |   | 9,719   |      |   |   | 977    |   |   |   | 92,318 |   |
|                                  |   |               |    |   |             |   |    |      |   |   |   |   |   |   |   |   |
| Depreciation and amortization         |   |               | 32,817  |   |             |   | 6,673   |      |   |   | 47     |   |   |   | 39,537 |   |

| 8. | INVENTORIES |
|----|-------------|

----

| 9.  | EMPLOYEE BENEFIT PLAN |
|----------|-----------------------|

|   |                           |   | Three months endedMarch 31, |   |
|--------|--------------------------------|--------|-----------------------------|--------|
|   | (in thousands)                 |   | 2011                        |   |   | 2010 |   |
|   |                           |   |                        |   |   |   |   |
|   | Service cost                   |   | $                           | -      |   |   | $ | - |   |
|   | Interest cost                  |   |                        | 479    |   |   |   | 473 |   |
|   | Expected return on plan assets |   |                        | (458   | ) |   |   | (422 | ) |
|   | Amortization of net losses     |   |                        | 116    |   |   |   | 102 |   |
|   | Net periodic benefit cost      |   | $                           | 137    |   |   | $ | 153 |   |

| 10. | NOTES PAYABLE TO BANKS |
|-----|------------------------|

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----

|   |                             |   | Three months ended |   |
|--------|----------------------------------|--------|--------------------|--------|
|   |                             |   | March 31,          |   |
|   |                             |   | 2011               |   |   | 2010 |   |
|   |                             |   |               |   |   |   |   |
|   | Interest incurred (in thousands) |   | $                  | 1,158  |   |   | $ | 538 |   |
|   |                             |   |               |   |   |   |   |   |   |
|   | Weighted average interest rate   |   |               | 3.4    | % |   |   | 2.0 | % |

| 11. | INCOME TAXES |
|-----|--------------|

| 12. | SUPPLEMENTAL CASH FLOWS INFORMATION |
|-----|-------------------------------------|

----

| 13.  | FAIR VALUE DISCLOSURES |
|-----------|------------------------|

|   | 1. | Level 1 – Quoted market prices in active markets for identical assets or liabilities.                                                                                                                                                                                                                                                                                        |
|--------|----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   | 2. | Level 2 – Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or liabilities. |
|   | 3. | Level 3 – Unobservable inputs developed using the Company’s estimates and assumptions, which reflect those that market participants would use.                                                                                                                                                                                                                         |

|                                                    |   | Fair value measurements at March 31, 2011 with:    |   |
|---------------------------------------------------------|--------|----------------------------------------------------|--------|
| (in thousands)                                          |   | Quoted prices inactive markets foridentical assets |   |   | Significant otherobservable inputs |   |   | Significantunobservableinputs |   |
|                                                    |   | (Level 1)                                          |   |   | (Level 2) |   |   | (Level 3) |   |
| Assets:                                                 |   |                                               |   |   |   |   |   |   |   |
| Trading securities                                      |   | $                                                  | -      |   |   | $ | 8,681 |   |   | $ | - |   |
| Available for sale securities – equity securities |   |                                               | 1,155  |   |   |   | - |   |   |   | - |   |
| Liabilities:                                            |   |                                               |   |   |   |   |   |   |   |   |   |   |
|    Interest rate swap                    |   | $                                                  | -      |   |   | $ | 402 |   |   | $ | - |   |

|                                                    |   | Fair value measurements at December 31, 2010 with: |   |
|---------------------------------------------------------|--------|----------------------------------------------------|--------|
| (in thousands)                                          |   | Quoted prices inactive markets foridentical assets |   |   | Significant otherobservable inputs |   |   | Significantunobservableinputs |   |
|                                                    |   | (Level 1)                                          |   |   | (Level 2) |   |   | (Level 3) |   |
| Assets:                                                 |   |                                               |   |   |   |   |   |   |   |
| Trading securities                                      |   | $                                                  | -      |   |   | $ | 8,445 |   |   | $ | - |   |
| Available for sale securities – equity securities |   |                                               | 1,124  |   |   |   | - |   |   |   | - |   |
| Liabilities:                                            |   |                                               |   |   |   |   |   |   |   |   |   |   |
|    Interest rate swap                    |   | $                                                  | -      |   |   | $ | 610 |   |   | $ | - |   |

----

----

| ITEM 2. | MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS |
|---------|---------------------------------------------------------------------------------------------|

----

----

|                                                                  |   | Three months ended March 31, |    |
|-----------------------------------------------------------------------|--------|-----------------------------------|---------|
|                                                                  |   | 2011                              |    |   | 2010 |   |
|                                                                  |   |                              |    |   |   |   |
| Consolidated revenues [in thousands]                                  |   | $                                 | 381,761 |   |   | $ | 213,144 |   |
| Revenues by business segment [in thousands]:                          |   |                              |    |   |   |   |   |   |
| Technical                                                             |   | $                                 | 349,402 |   |   | $ | 191,403 |   |
| Support                                                               |   |                              | 32,359  |   |   |   | 21,741 |   |
|                                                                  |   |                              |    |   |   |   |   |   |
| Consolidated operating profit  [in thousands]               |   | $                                 | 106,326 |   |   | $ | 22,568 |   |
| Operating profit (loss) by business segment [in thousands]:           |   |                              |    |   |   |   |   |   |
| Technical                                                             |   | $                                 | 99,916  |   |   | $ | 24,958 |   |
| Support                                                               |   |                              | 9,935   |   |   |   | 1,910 |   |
| Corporate                                                             |   |                              | (4,936  | ) |   |   | (3,436 | ) |
| Gain (loss) on disposition of assets, net                             |   |                              | 1,411   |   |   |   | (864 | ) |
|                                                                  |   |                              |    |   |   |   |   |   |
| Percentage cost of revenues to revenues                               |   |                              | 52.7    | % |   |   | 60.8 | % |
| Percentage selling, general & administrative expenses to revenues |   |                              | 9.4     | % |   |   | 13.1 | % |
| Percentage depreciation and amortization expense to revenues          |   |                              | 10.4    | % |   |   | 15.1 | % |
| Average U.S. domestic rig count                                       |   |                              | 1,716   |   |   |   | 1,345 |   |
| Average natural gas price (per thousand cubic feet (mcf))             |   | $                                 | 4.13    |   |   | $ | 5.09 |   |
| Average oil price (per barrel)                                        |   | $                                 | 93.99   |   |   | $ | 78.03 |   |

----

----

----

|                                                 |   | Three months ended March 31, |    |
|------------------------------------------------------|--------|------------------------------|---------|
| (In thousands)                                       |   | 2011                         |    |   | 2010 |   |
|                                                 |   |                         |    |   |   |   |
| Net cash provided by (used for) operating activities |   | $                            | 85,632  |   |   | $ | (11,454 | ) |
| Net cash used for investing activities               |   |                         | (86,288 | ) |   |   | (8,271 | ) |
| Net cash provided by financing activities            |   |                         | 3,299   |   |   |   | 19,057 |   |

----

----

----

----

----

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|   |                                        |   |                                                                                                                                                                                                                                  |      |    |   |                                  |   |   |                                                                                    |   |   |                                                                                                                    |   |   |   |
|--------|---------------------------------------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------|---------|--------|---------------------------------------|--------|--------|-----------------------------------------------------------------------------------------|--------|--------|-------------------------------------------------------------------------------------------------------------------------|--------|--------|--------|
|   |  Period                                |   | Total Number ofShares (or Units)Purchased                                                                                                                                                                                             |      |    |   | Average Price PaidPer Share (or Unit) |   |   | Total Number ofShares (or Units)Purchased as Part ofPublicly AnnouncedPlans or Programs |   |   | Maximum Number (orApproximate Dollar Value) ofShares (or Units) that May YetBe Purchased Under the Plansor Programs (1) |   |
|   |  Month #1                              |   |                                                                                                                                                                                                                                  |      |    |   |                                  |   |   |                                                                                    |   |   |                                                                                                                    |   |
|   |  January 1, 2011 to January 31, 2011   |   |                                                                                                                                                                                                                                  | 499,490   | (1) (2) |   |                                  | $      | 17.28  |                                                                                    |   |   | 301,400                                                                                                                 |   |   |   | 3,909,498 |   |
|   |                                        |   |                                                                                                                                                                                                                                  |      |    |   |                                  |   |   |                                                                                    |   |   |                                                                                                                    |   |   |   |   |   |   |   |
|   |  Month #2                              |   |                                                                                                                                                                                                                                  |      |    |   |                                  |   |   |                                                                                    |   |   |                                                                                                                    |   |   |   |   |   |
|   |  February 1, 2011 to February 28, 2011 |   |                                                                                                                                                                                                                                  | 508,885   | (1) (2) |   |                                  |   | 17.39  |                                                                                    |   |   | 508,977                                                                                                                 |   |   |   | 3,400,521 |   |
|   |                                        |   |                                                                                                                                                                                                                                  |      |    |   |                                  |   |   |                                                                                    |   |   |                                                                                                                    |   |   |   |   |   |   |   |
|   |  Month #3                              |   |                                                                                                                                                                                                                                  |      |    |   |                                  |   |   |                                                                                    |   |   |                                                                                                                    |   |   |   |   |   |
|   |  March 1, 2011 to March 31, 2011       |   |                                                                                                                                                                                                                                  | -         |    |   |                                  |   | -      |                                                                                    |   |   | -                                                                                                                       |   |   |   | 3,400,521 |   |
|   |  Totals                                |   |                                                                                                                                                                                                                                  | 1,008,375 |    |   |                                  | $      | 17.33  |                                                                                    |   |   | 810,377                                                                                                                 |   |   |   | 3,400,521 |   |
|   |                                        |   |                                                                                                                                                                                                                                  |      |    |   |                                  |   |   |                                                                                    |   |   |                                                                                                                    |   |   |   |   |   |   |   |
|   |                                        | (1)    |  The Company’s Board of Directors announced a stock buyback program in March 1998 authorizing the repurchase of 17,718,750 shares in the open market. Currently the program does not have a predetermined expiration date. |      |
|   |                                        |   |                                                                                                                                                                                                                                  |      |    |   |                                  |   |
|   |                                        | (2)    |  Consists in part of shares repurchased by the Company in connection with option exercises and taxes related to vesting of restricted shares.                                                                                    |      |
|   |                                        |   |                                                                                                                                                                                                                                  |      |    |   |                                  |   |   |                                                                                    |   |   |                                                                                                                    |   |   |   |   |   |   |   |

----

----

| ExhibitNumber |   | Description                                                                                                                                                                                       |
|---------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 3.1(a)        |   | Restated certificate of incorporation of RPC, Inc. (incorporated herein by reference to Exhibit 3.1 to the Annual Report on Form 10-K for the fiscal year ended December 31, 1999).               |
|          |   |                                                                                                                                                                                              |
| 3.1(b)        |   | Certificate of amendment of the certificate of incorporation of RPC, Inc. (incorporated by reference to Exhibit 3.1(b) to Registrant’s Quarterly Report on Form 10-Q filed on May 8, 2006). |
|          |   |                                                                                                                                                                                              |
| 3.2           |   | Amended and Restated Bylaws of RPC, Inc. (incorporated herein by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed on October 25, 2007).                        |
|          |   |                                                                                                                                                                                              |
| 4             |   | Form of Stock Certificate (incorporated herein by reference to Exhibit 4 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 1998).                       |
|          |   |                                                                                                                                                                                              |
| 31.1          |   | Section 302 certification for Chief Executive Officer.                                                                                                                                            |
|          |   |                                                                                                                                                                                              |
| 31.2          |   | Section 302 certification for Chief Financial Officer.                                                                                                                                            |
|          |   |                                                                                                                                                                                              |
| 32.1          |   | Section 906 certifications for Chief Executive Officer and Chief Financial Officer.                                                                                                               |

----

|                                     | RPC, INC.                                    |   |
|------------------------------------------|----------------------------------------------|--------|
|                                     |                                         |   |
| Date:  May 5, 2011   |                                         |   |
|                                     |  /s/ Richard A. Hubbell                 |   |
|                                     | Richard A. Hubbell                           |   |
|                                     | President and Chief Executive Officer        |   |
|                                     | (Principal Executive Officer)                |   |
|                                     |                                         |   |
| Date:  May 5, 2011        |                                         |   |
|                                     |  /s/ Ben M. Palmer                      |   |
|                                     | Ben M. Palmer                                |   |
|                                     | Vice President and Chief Financial Officer   |
|                                     | (Principal Financial and Accounting Officer) |   |