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Method of Delivering Fluid to dissolve Controlled Electrolytic Metallic Barriers

IP.com Disclosure Number: IPCOM000240371D
Publication Date: 2015-Jan-27
Document File: 1 page(s) / 31K

Publishing Venue

The IP.com Prior Art Database

Abstract

When incorporating Controlled Electrolytic Metallic (CEM) barriers into a drilling liner or sand control screen it is important that the fluid used to reach TD don't induce corrosion or premature dissolution of CEM. This method would incorporate cement spacer technology and cementing darts to place a limited amount of an activation fluid for the corrosion process to proceed. This method prevents fluid contamination, and/or limitation. requires brine or acid to dissolve. When incorporated in a drill string, liner, or sand control screen it is important to prevent fluid loss, and premature dissolution. The material can be RIH using oil based fluids or fluids designed not to corrode CEM. Once at TD the operator can use cement spacer technology by using cementing darts to place a limited amount of an activation fluid to start the corrosion process. This would eliminate the need to displace the entire well to a fluid that may contaminate the mud, or cause production issues. This fluid can be acid, brine, or even a buffered completion brine with acidic qualities. This technology would clean up the well while being pumped to TD, and carry the fluid necessary to corrode the CEM plugs or barriers. The dart could run to a landing collar just below the tooling with the CEM plugs/barrier discs. This would provide well isolation, and then allow communication with the reservoir as the CEM plugs/barrier discs corrode The solution could be a buffered brine that would not have the corrosive effects of the stronger acids to prevent damage to downhole equipment, but still behave like an acid to the CEM material. The dart would close the toe, and can be made from a composite material to allow an easy drill out if the well needed to be extended or for other completion/workover activities. The CEM material could be used as solid plugs, sleeve inserts, or even barrier discs protecting sand control media such as bead screen.

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Method of Delivering Fluid to dissolve Controlled Electrolytic Metallic Barriers

When incorporating Controlled Electrolytic Metallic (CEM) barriers into a drilling liner or sand control screen it is important that the fluid used to reach TD don't induce corrosion or premature dissolution of CEM. This method would incorporate cement spacer technology and cementing darts to place a limited amount of an activation fluid for the corrosion process to proceed. This method prevents fluid contamination, and/or limitation.

requires brine or acid to dissolve. When incorporated in a drill string, liner, or sand control screen it is important to prevent fluid loss, and premature dissolution. The material can be RIH using oil based fluids or fluids designed not to corrode CEM. Once at TD the operator can use cement spacer technology by using cementing darts to place a limited amount of an activation fluid to start the corrosion process. This would eliminate the need to displace the entire well to a fluid that may contaminate the mud, or cause production issues. This fluid can be acid, brine, or even a buffered completion brine with acidic qualities. This technology would clean up the well while being pumped to TD, and carry the fluid necessary to corrode the CEM plugs or barriers. The dart could run to a landing collar just below the tooling with the CEM plugs/barrier discs. This would provide well isolation, and then allow communication with the reservoir as the CEM plugs/barrier...