DCMS®
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Downhole Corrosion Monitoring System Features:  Records Corrosion Rate and Temperature Data  Establishes Effectiveness of Corrosion Inhibitor Treatments  Rated to 10,000 psi and 302ºF (150ºC)  Setting and Retrieval at any Depth  Battery life of 90 Days  Easy Download and Graphing of Data via CORRDATA® II Software  Available for Purchase or Rental The newly re‐designed DCMS Downhole Corrosion Monitoring System provides continuous corrosion history of downhole tubing. The DCMS™ tool is another RCS innovation, and the only tool available which provides recorded corrosion and temperature data for the hostile conditions of downhole operation. The sensitivity of the system enables the film persistence of inhibitors to be evaluated in actual operating conditions, something that was not possible prior to the development of the DCMS™. The DCMS™ tool may be attached to a variety of wireline approved running tools for insertion into the production well at the start of testing and retrieval from the well at the end of the testing period. The DCMS™ tool can be set at any required depth — wherever the most critical corrosion regions are located. Several DCMS™ tools may be run simultaneously in a well, in order to obtain corrosion data for the different depths, while under the same operating conditions. The DCMS™ tool is comprised of a electrical resistance probe, an electronic memory module and a battery pack. The body of the DCMS™ tool is a 17‐4 PH stainless steel body treated to satisfy NACE MR0175 requirements. The body has a 1.25" OD with a 5/8" sucker rod connection for attachment to the wireline‐run tubing hanger or lock. The design of the tool permits operation up to 10,000 psi and 302 ° F (150 ̊ C). The electronic module is powered by a lithium battery pack that will provide more than 90 days of data, when programmed to read once every two hours. Even if the tool is left in the well beyond the battery life, the non‐volatile memory protects the recorded data. Downhole Coupon Holder Assembly The probe sampling interval of 1 hour, 2 hours, or 4 hours may be selected as required to fit within the 1,024 reading storage capacity for the run time in the well. The probe measurement element, which is usually made of carbon steel, is electrically isolated from the DCMS™ tool body, to prevent galvanic action between the probe body and the probe element. An optional coupon holder assembly consisting of up to nine metal loss strip, pre‐stressed or tensile coupons for subsequent analysis of material degradation due to pitting and stress corrosion cracking, can be attached to

The DCMS system consists of the following: Downhole Tool (includes one 724050‐T20‐K03005 probe) Corrdata II Software DHT Communications Adapter Battery De‐passivation Instrument Probe Monitor Instrument DCHA Downhole Coupon Holder Assembly (optional) DCHA Downhole Coupon Holder Assembly is available for use by itself or in conjunction with the DCMS Downhole Tool. The coupon holder accommodates up to nine coupon holder assemblies. Coupon holders are available for stressed and unstressed strip coupons and cylindrical tensile test specimens for subsequent ...

Installation, Setting, and Retrieval of DCMS Tool: Wireline Running Tools With the appropriate wireline tools the DCMS tool can be set easily at any required depth. Customers may use their own preferred wireline company for running tools and DCMS installation and removal. Cosasco can provide requirements for the necessary soft setting tools and required running procedures. Alternatively Cosasco can provide the necessary running tools as shown below. The following four sets of running tools are recommended for the insertion, setting, and retrieval of the DCMS tool. All four sets of ...

Installed DCMS Tool String This Installed DCMS tool string is connected to the DCMS Tool by a 5/8” sucker rod connection. An optional Coupon Holder Assembly that holds up to 12 Strip Coupons may be attached to the Downhole tool for additional metal loss measurements. The Plunk Whiskered Bomb Hanger shown to the right suspends the Downhole Tool inside the diameter of the tubing. It contains a set of dog grabs, engaging the tubing to prevent any upward or downward movement, assuring the Downhole Tool stays in place. The ...

Ordering Information: Part Number 724120 724121 Replacement Parts and Accessories Part Number Description 724089 Battery Assembly – Downhole Probe 7.4 g Lithium ‐40 TO +150 deg C 724050‐T10‐K03005 Downhole Probe w/Carbon Steel Element 724050‐T10‐S31600 Downhole Probe w/316 SS Element 724050‐T10‐S31603 Downhole Probe w/316L SS Element 724050‐T20‐K03005 Downhole Probe w/Carbon Steel Element Downhole Probe w/316 SS Element ...