Design and Evaluation of an Elastomeric Sealant for Use in PrimaryCementing (2007)

Design and Evaluation of an Elastomeric Sealant for Use in Primary Cementing J. S. Phipps; J. S. Phipps Schlumberger Search for other works by this author on: This Site Google Scholar H. K. J. Ladva; H. K. J. Ladva Schlumberger Search for other works by this author on: This Site Google Scholar B. Craster; B. Craster Schlumberger Search for other works by this author on: This Site Google Scholar J. -P. Caritey; J. -P. Caritey Schlumberger Search for other works by this author on: This Site Google Scholar B. Dargaud B. Dargaud Schlumberger Search for other works by this author on: This Site Google Scholar Paper presented at the International Symposium on Oilfield Chemistry, Houston, Texas, U.S.A., February 2007. Paper Number: SPE-106207-MS https://doi.org/10.2118/106207-MS Published: February 28 2007 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Phipps, J. S., Ladva, H. K. J., Craster, B., Caritey, J. -P., and B. Dargaud. "Design and Evaluation of an Elastomeric Sealant for Use in Primary Cementing." Paper presented at the International Symposium on Oilfield Chemistry, Houston, Texas, U.S.A., February 2007. doi: https://doi.org/10.2118/106207-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE International Conference on Oilfield Chemistry Search Advanced Search Abstract We describe the design and development of an elastomeric sealant for improved zonal isolation. The sealant is intended for use during primary cementing, and has been formulated so that it can be pumped as part of the cement train and placed around the shoe of a casing. In this way reliable isolation at key points in the well can be achieved without incurring excessive costs. The mechanical property specifications of the sealant have been determined using stress analysis; we show how a sufficiently deformable material remains effectively confined by the wellbore and thus cannot be subjected to tensile stresses that could cause its failure, and that it needs to be held in a state of compressive stress in order to prevent gas leakage. By applying pressure to the sealant during curing and allowing it to expand thermally afterwards, a suitable state of compression can in principle be generated. The necessary control over the rheology, density and curing time of the sealant to enable its reliable placement has been achieved. The effect of the initial stress state and the performance of the sealant compared with cement-based materials are demonstrated in a full-scale test. Keywords: cement property, Upstream Oil & Gas, differential, MPa, compression, casing and cementing, calculation, zonal isolation, placement, cement formulation Subjects: Drilling Fluids and Materials, Casing and Cementing, Drilling fluid selection and formulation (chemistry, properties), Cement formulation (chemistry, properties), Completion Installation and Operations Copyright 2007, Society of Petroleum Engineers You can access this article if you purchase or spend a download.