**EXHIBIT 99.6** **LETTER TO CLIENTS****REGARDING THE OFFER TO    EXCHANGE****$600,000,000 PRINCIPAL AMOUNT    OF****5.95%****SENIOR NOTES DUE 2012****AND****$600,000,000 PRINCIPAL AMOUNT    OF****6.35%****SENIOR NOTES DUE 2017****AND****$300,000,000 PRINCIPAL AMOUNT    OF****6.80%    SENIOR NOTES DUE 2037****OF****WEATHERFORD INTERNATIONAL,    INC.**     To Our Clients:     We are enclosing herewith a Prospectus, dated    [          ],    2007 of Weatherford International, Inc. (the    “Company”) and a related Letter of Transmittal    (which together constitute the “Exchange    Offer”) relating to the offer by the Company to    exchange the Company’s new 5.95% Senior Notes due 2012    (the “2012 Exchange Notes”), 6.35% Senior    Notes due 2017 (the “2017 Exchange Notes”) and    6.80% Senior Notes due 2037 (the “2037 Exchange    Notes,” and collectively with the 2012 Exchange Notes    and the 2017 Exchange Notes, the “Exchange    Notes”), pursuant to an offering registered under the    Securities Act of 1933, as amended (the “Securities    Act”), for like principal amounts of its    5.95% Senior Notes due 2012 (the “2012 Outstanding    Notes”), 6.35% Senior Notes due 2017 (the    “2017 Outstanding Notes”) and 6.80% Senior    Notes due 2037 (the “2037 Outstanding Notes,”    and collectively with the 2012 Outstanding Notes and the 2017    Outstanding Notes, the “Outstanding Notes”),    respectively, upon the terms and subject to the conditions set    forth in the Prospectus and the Letter of Transmittal. **PLEASE NOTE THAT THE    EXCHANGE OFFER WILL EXPIRE AT****5:00 P.M., NEW YORK CITY    TIME, ON    [          ],    2007, UNLESS EXTENDED.**      The Exchange Offer is not conditioned upon any minimum number of    Outstanding Notes being tendered.     This material is being forwarded to you as the beneficial owner    of the Outstanding Notes carried by us in your account, but not    registered in your name. **A TENDER OF SUCH OUTSTANDING    NOTES CAN BE MADE ONLY BY US AS THE REGISTERED HOLDER FOR    YOUR ACCOUNT AND PURSUANT TO YOUR INSTRUCTIONS. THE ENCLOSED    LETTER OF TRANSMITTAL IS FURNISHED TO YOU FOR YOUR INFORMATION    ONLY AND CANNOT BE USED TO TENDER OUTSTANDING NOTES.**     Pursuant to the Letter of Transmittal, each holder of    Outstanding Notes must make certain representations and    warranties that are set forth in the Letter of Transmittal and    in the attached form that we have provided to you for your    instructions regarding what action we should take in the    Exchange Offer with respect to your interest in the Outstanding    Notes.     We request instructions as to whether you wish to tender any or    all of your Outstanding Notes held by us for your account    pursuant to the terms and subject to the conditions of the    Exchange Offer. We also request that you confirm that we may on    your behalf make the representations contained in the Letter of    Transmittal that are to be made with respect to you as    beneficial owner.     Your instructions to us should be forwarded as promptly as    possible in order to permit us to tender Outstanding Notes on    your behalf in accordance with the provisions of the Exchange    Offer. **THE EXCHANGE OFFER WILL EXPIRE AT**

 
**5:00 P.M., NEW YORK CITY TIME, ON    [          ],    2007, UNLESS EXTENDED.**Outstanding Notes tendered pursuant    to the Exchange Offer may be withdrawn, subject to the    procedures described in the Prospectus, at any time prior to    such Expiration Date.     If you wish to have us tender any or all of your Outstanding    Notes held by us for your account or benefit, please so instruct    us by completing, executing and returning to us the attached    instruction form. The accompanying Letter of Transmittal is    furnished to you for informational purposes only and may not be    used by you to tender Outstanding Notes held by us and    registered in our name for your account or benefit. **NONE OF    THE OUTSTANDING NOTES HELD BY US FOR YOUR ACCOUNT WILL BE    TENDERED UNLESS WE RECEIVE WRITTEN INSTRUCTIONS FROM YOU TO    DO SO. UNLESS A SPECIFIC CONTRARY INSTRUCTION IS GIVEN,    YOUR SIGNATURE ON THE ATTACHED “INSTRUCTIONS TO    REGISTERED HOLDER OR DTC PARTICIPANT FROM BENEFICIAL OWNER”    SHALL CONSTITUTE AN INSTRUCTION TO US TO TENDER ALL OF THE    OUTSTANDING NOTES HELD BY US FOR YOUR ACCOUNT.**     Accordingly, we request instructions as to whether you wish us    to tender on your behalf the Outstanding Notes held by us for    your account, pursuant to the terms and conditions set forth in    the enclosed Prospectus and Letter of Transmittal.