CHANGE IN TERMS AGREEMENT

Principal: $652,955.52; Loan Date: 10-01-2004; Maturity: 10-30-2008.

Borrower: Flotek Industries, Inc. (TIN: 77-0709256); 7030 Empire Central Drive; Houston, Texas 77040.

Lender: Legacy Bank; Legacy Bank; PO Box 1109; 2024 N. Hwy 81; Duncan, Oklahoma 73534-1109.

Principal Amount: $652,955.52; Initial Rate: 8.500%; Date of Note: October 1, 2004.

PROMISE TO PAY. Flotek Industries, Inc. (“Borrower”) promises to pay to Legacy Bank (“Lender”), or order, in lawful money of the United States of America, the principal amount of Six Hundred Fifty-two Thousand Nine Hundred Fifty-five & 52/100 Dollars ($652,955.52) together with interest on the unpaid principal balance from October 1, 2004, until paid in full.

PAYMENT. Subject to any payment changes resulting from changes in the Index, Borrower will pay this loan in 48 regular payments of $16,240.14 each. Borrower’s first payment is due November 30, 2004, and all subsequent payments are due on the same day of each month after that. Borrower’s final payment will be due on October 30, 2008, and will be for all principal and all accrued interest not yet paid. Payments include principal and interest. Unless otherwise agreed or required by applicable law, payments will be applied first to any unpaid collection costs; then to any late charges; then to any accrued unpaid interest; and then to principal. The annual interest rate for this Note is computed on a 365/360 basis; that is, by applying the ratio of the annual interest rate over a year of 360 days, multiplied by the outstanding principal balance, multiplied by the actual number of days the principal balance is outstanding. Borrower will pay Lender at Lender’s address shown above or at such other place as Lender may designate in writing.

VARIABLE INTEREST RATE. The interest rate on this Agreement is subject to change from time to time based on changes in an independent index which is the minimum prime lending rate for large U.S. Money Center Commercial banks as published in the Money Rate Section of the Wall Street Journal (the “Index.). The Index is not necessarily the lowest rate charged by Lender on its loans. If the Index becomes unavailable during the term of this loan, Lender may designate a substitute index after notice to Borrower. Lender will tell Borrower the current Index rate upon Borrower’s request. The interest rate change will not occur more often than each quarter. Borrower understands that Lender may make loans based on other rates as well. The Index currently is 4.750% per annum. Prior to adding or subtracting any margin to the Index, the Index is rounded up to the nearest 0.001 per cent, resulting in a current rounded Index of 4.750%. The interest rate to be applied to the unpaid principal balance of the Note will be at a rate of 3.750 percentage points over the Index, rounded up to the nearest 0.001 percent, resulting in an initial rate of 8.500% per annum. NOTICE: Under no circumstances will the interest rate on the Note be more than the maximum rate allowed by applicable law. Whenever increases occur in the interest rate, Lender, at its option, may do one or more of the following: (A) increase Borrower’s payments to ensure Borrower’s loan will pay off by its original final maturity date, (B) increase Borrower’s payments to cover accruing interest, (C) increase the number of Borrower’s payments, and (D) continue Borrower’s payments at the same amount and increase Borrower’s final payment.

PREPAYMENT. Borrower agrees that all loan fees and other prepaid finance charges are earned fully as of the date of the loan and will not be subject to refund upon early payment (whether voluntary or as a result of default), except as otherwise required by law. Except for the foregoing, Borrower may pay without penalty all or a portion of the amount owed earlier than it is due. Early payments will not, unless agreed to by Lender in writing, relieve Borrower of Borrower’s obligation to continue to make payments under the payment schedule. Rather, early payments will reduce the principal balance due and may result in Borrower’s making fewer payments. Borrower agrees not to send Lender payments marked “paid in full” “without recourse”, or similar language. If Borrower sends such a payment, Lender may accept it without losing any of Lender’s rights under this Note, and Borrower will remain obligated to pay any further amount owed to Lender. All written communications concerning disputed amounts, including any check or other payment instrument that indicates that the payment constitutes “payment in full” of the amount owed or that is tendered with other conditions or limitations or as full satisfaction of a disputed amount must be mailed or delivered to: Legacy Bank, Legacy Bank, PO Box 1109, 2024 N. Hwy 81, Duncan, OK 73534-1109.

LATE CHARGE. If a payment is 11 days or more late, Borrower will be charged 5.000% of the unpaid portion of the regularly scheduled payment or $20.00, whichever is greater.

INTEREST AFTER DEFAULT. Upon default, including failure to pay upon final maturity, Lender, at its option, may, if permitted under applicable law, increase the variable interest rate on this Note to 21.000% per annum. The interest rate will not exceed the maximum rate permitted by applicable law.

DEFAULT.

Each of the following shall constitute an event of default (“Event of Default”) under this Note: Payment Default. Borrower fails to make any payment when due under this Note.

Other Defaults. Borrower fails to comply with or to perform any other term, obligation, covenant or condition contained in this Note or in any of the Related Documents or to comply with or to perform any term, obligation, covenant or condition contained in any other agreement between Lender and Borrower.

Default in Favor of Third Parties. Borrower or any Grantor defaults under any loan, extension of credit, security agreement, purchase or sales agreement, or any other agreement, in favor of any other creditor or person that may materially affect any of Borrower’s property or Borrower’s ability to repay this Note or perform Borrower’s obligations under this Note or any of the Related Documents.

False Statements. Any warranty, representation or statement made or furnished to Lender by Borrower or on Borrower’s behalf under this Note or the related documents is false or misleading in any material respect, either now or at the time made or furnished or becomes false or misleading at any time thereafter.

Insolvency. The dissolution or termination of Borrower’s existence as a going business, the insolvency of Borrower, the appointment of a receiver for any part of Borrower’s property, any assignment for the benefit of creditors, any type of creditor workout, or the commencement of any proceeding under any bankruptcy or insolvency laws by or against Borrower.

Creditor or Forfeiture Proceedings. Commencement of foreclosure or forfeiture proceedings, whether by judicial proceeding, self-help, repossession or any other method, by any creditor of Borrower or by any governmental agency against any collateral securing the loan. This includes a garnishment of any of Borrower’s accounts, including deposit accounts, with Lender. However, this Event of Default shall not apply if there is a good faith dispute by Borrower as to the validity or reasonableness of the claim which is the basis of the creditor or forfeiture proceeding and if Borrower gives Lender written notice of the creditor or forfeiture proceeding and deposits with Lender monies or a surety bond for the creditor or forfeiture proceeding, in an amount determined by Lender, in its sole discretion, as being an adequate reserve or bond for the dispute.

Events Affecting Guarantor. Any of the preceding events occurs with respect to any Guarantor of any of the indebtedness or any Guarantor dies or becomes incompetent, or revokes or disputes the validity of, or liability under, any guaranty of the indebtedness evidenced by this Note. In the event of a death, Lender, at its option, may, but shall not be required to, permit the Guarantor’s estate to assume unconditionally the obligations arising under the guaranty in a manner satisfactory to Lender, and, in doing so, cure any Event of Default.

Change In Ownership. Any change in ownership of twenty-five percent (25%) or more of the common stock of Borrower.

Adverse Change. A material adverse change occurs in Borrower’s financial condition, or Lender believes the prospect of payment or performance of this Note is impaired.

Insecurity. Lender in good faith believes itself insecure.

Cure Provisions. If any default, other than a default in payment is curable and if Borrower has not been given a notice of a breach of the same provision of this Note within the preceding twelve (12) months, it may be cured (and no event of default will have occurred) if Borrower, after receiving written notice from Lender demanding cure of such default: (1) cures the default within ten (10) days; or (2) if the cure requires more than ten (10) days, immediately initiates steps which Lender deems in Lender’s sole discretion to be sufficient to cure the default and thereafter continues and completes all reasonable and necessary steps sufficient to produce compliance as soon as reasonably practical.

LENDER’S RIGHTS. Upon default, Lender may declare the entire unpaid principal balance on this Note and all accrued unpaid interest immediately due, and then Borrower will pay that amount.

ATTORNEYS’ FEES; EXPENSES. Lender may hire or pay someone else to help collect this Note if Borrower does not pay. Borrower will pay Lender that amount. This includes, subject to any limits under applicable law, Lender’s attorneys’ fees and Lender’s legal expenses, whether or not there is a lawsuit, including without limitation all attorneys’ fees and legal expenses for bankruptcy proceedings (including efforts to modify or vacate any automatic stay or injunction), and appeals. If not prohibited by applicable law, Borrower also will pay any court costs, in addition to all other sums provided by law.

GOVERNING LAW. This Note will be governed by, construed and enforced in accordance with federal law and the laws of the State of Ok1ahoma. This Note has been accepted by Lender in the State of Oklahoma.

DISHONORED ITEM FEE. Borrower will pay a fee to Lender of $20.00 if Borrower makes a payment on Borrower’s loan and the check or other payment order including any preauthorized charge with which Borrower pays is later dishonored.

RIGHT OF SETOFF. To the extent permitted by applicable law, Lender reserves a right of setoff in all Borrower’s accounts with Lender (whether checking, savings, or some other account). This includes all accounts Borrower holds jointly with someone else and all accounts Borrower may open in the future. However, this does not include any IRA or Keogh accounts, or any trust accounts for which setoff would be prohibited by law. Borrower authorizes Lender, to the extent permitted by applicable law, to charge or setoff all sums owing on the indebtedness against any and all such accounts, and, at Lender’s option, to administratively freeze all such accounts to allow Lender to protect Lender’s charge and setoff rights provided in this paragraph.

COLLATERAL. Borrower, acknowledges this Note is secured by commercial security agreements from Chemical and Equipment Specialties, Inc., Neal’s Technology, Inc., Padko International, Inc., Plainsman Technology, Inc. and Esses, Inc. dated 5-30-2001 and filed centrally with the clerks of Oklahoma, Texas, Delaware and Louisiana, guaranteed by Dr. Glenn S. Penny and commercial security agreements from Flotek Industries, Inc. and its subsidiaries i.e.; Chemical and Equipment Specialties, Inc., Neal’s Technology, Inc., Esses, Inc., Plainsman Technology, Inc., Padko International, Inc., Turbeco, Inc., USA Petrovalve, Inc., Trinity Tool, Inc., Material Translogistics, Inc., and Petrovalve, Inc. dated 1-7-2002 to lender and filed centrally with the clerks of Oklahoma, Texas, Delaware and Louisiana on all UCC collateral.

ADDITIONAL FEES. Borrower(s) agrees to pay any and all fees or costs associated with this indebtedness as deemed necessary by Lender, for file documentation or security perfection. These additional fees or costs may include, but not be limited to, attorney fees, appraisal fees, title fees, filing and recording fees, or abstracting fees. Said fees, if not paid when incurred, will be added to the principal of this indebtedness.

PRIOR NOTE. Legacy Bank loan numbers 9592507 and 9658178.

SUCCESSOR INTERESTS. The terms of this Note shall be binding upon Borrower, and upon Borrower’s heirs, personal representatives, successors and assigns, and shall inure to the benefit of Lender and its successors and assigns.

NOTIFY US OF INACCURATE INFORMATION WE REPORT TO CONSUMER REPORTING AGENCIES. Please notify us if we report any inaccurate information about your account(s) to a consumer reporting agency. Your written notice describing the specific inaccuracy(ies) should be sent to us at the following address: Legacy Bank, PO Box 1038, Hinton, OK 73047.

GENERAL PROVISIONS. Lender may delay or forgo enforcing any of its rights or remedies under this Note without losing them. Borrower and any other person who signs, guarantees or endorses this Note, to the extent allowed by law, waive presentment, demand for payment, and notice of dishonor. Upon any change in the terms of this Note, and unless otherwise expressly stated in writing, no party who signs this Note, whether as maker, guarantor, accommodation maker or endorser, shall be released from liability. All such parties agree that Lender may renew or extend (repeatedly and for any length of time) this loan or release any party or guarantor or collateral; or impair, fail to realize upon or perfect Lender’s security interest in the collateral; and take any other action deemed necessary by Lender without the consent of or notice to anyone. All such parties also agree that Lender may modify this loan without the consent of or notice to anyone other than the party with whom the modification is made. The obligations under this Note are joint and several.

PRIOR TO SIGNING THIS NOTE, BORROWER READ AND UNDERSTOOD All THE PROVISIONS OF THIS NOTE, INCLUDING THE VARIABLE INTEREST RATE PROVISIONS. EACH BORROWER AGREES TO THE TERMS OF THE NOTE.

BORROWER ACKNOWLEDGES RECEIPT OF A COMPLETED COPY OF THIS PROMISSORY NOTE.

BORROWER:

FLOTEK INDUSTRIES, INC.

By: /s/ Jerry D. Dumas, Sr.

Jerry D. Dumas, Sr., CEO of Flotek Industries, Inc.

By: /s/ Lisa G. Bromiley Meier

Lisa G. Bromiley Meier, Chief Financial Officer of Flotek Industries, Inc.