Money Market Funds

ANCHOR DRILLING FLUIDS, USA 401(K) PLAN INVESTMENT ELECTION FORM PARTICIPANT NAME SOC SEC #

DAYTIME PHONE ( ) Current Balance Only ( ) Future Contributions Only ( ) Current Balance and Future Contributions

Please fill in the percentage elected in the column at right. Money Market Funds Option 22 - Lifestyle Funds Option 1 - Invesco Liquid Assets (02) % (Choose Only One)

Fixed Income Funds TCO Conservative Asset Alloc (80)  TCO Balanced Income Asset Alloc (78) Option 2 - TCO Vanguard Sh Term Treas (10) %  TCO Balanced Asset Alloc (81) Option 3 - TCO Vanguard Sh Term Inv-Gr (11) %  TCO Balanced Growth Asset Alloc (79) Option 4 - TCO Trust Company Bond (12) %  TCO Growth Asset Alloc (82) Option 5 – TCO PIMCO Total Return Inst (16) %  TCO Aggressive Growth Asset Alloc (83)

Balanced Funds (% for Option 22 Only) % Option 6 – TCO Dodge & Cox Balanced (20) %

Large Cap Equity Funds Option 23 - Target Retirement Funds Option 7 – TCO Vanguard Windsor II (24) % (Choose Only One) Option 8 – TCO Davis NY Venture (56) % Option 9 – TCO Trust Company Equity (25) %  TCO Target Retirement Income (91) Option 10 – TCO Vanguard 500 Index (29) %  TCO Target In Retirement (92) Option 11 - TCO Dodge & Cox Stock (23) %  TCO Target Retirement 2015 (93) Option 12 – TCO Calamos Growth (57) %  TCO Target Retirement 2025 (94)  TCO Target Retirement 2035 (95) Mid/Small Cap Equity Funds  TCO Target Retirement 2045 (96) Option 13 – TCO Vanguard Mid-Cap Index (33) %  TCO Target Retirement 2055 (97) Option 14 – TCO T. Rowe Price Mid-Cap (50) % Option 15 – TCO American Beacon Sm Cap Val (58) % (% for Option 23 Only) % Option 16 – TCO Vanguard Sm-Cap Index (34) % Option 17 – TCO Bogle Small-Cap Growth (55) %

International Equity Funds Option 18 – TCO Vanguard International (60) % Option 19 – TCO Harbor International (63) % Option 20 – TCO Dodge & Cox International (44) %

Real Estate Funds Option 21 –TCO Cohen & Steers Realty Fund (66) % GRAND TOTAL (MUST EQUAL 100%) 100% You may request changes in your investment election by faxing your signed and completed form to The Trust Company of Oklahoma, Attn: Retirement Plan Services Fax 866-786-3655. Your request will be processed within two business days of receipt. You may also change your investment elections on-line at www.trustok.com, select “On-Line Access”, then “401K or Profit Sharing Plan”, Employer Code = 2000.

I further understand that in the absence of an Investment Election Form, I understand my contributions will be invested in the TCO Target Date Fund appropriate for my projected retirement date until I direct otherwise by submitting a completed Investment Election Form or submitting an online change at www.trustok.com.

Participant’s Signature Date Signed 7/2010