Methods of cementing pipe in well bores and low density cement compositions therefor
December 10, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3042535 3804058 Low density cement slurry and its use Well cementing process and gasified cements useful therein Well cementing process and gasified cements useful therein One-component hardenable substances stable to storage and activatable by mechanical and/or physical forces and method of producing, activating and applying same Low density cement slurry and its use Glass bubbles of increased collapse strength Low density spacer fluid Elastomeric sealants InventorsAssigneeApplicationNo. 10315835 filed on 12/10/2002US Classes:106/676, Glass containing106/677, Organic material containing106/678, Organic sulfur or organic phosphorus106/724, Organic material containing166/293, Cement or consolidating material contains inorganic water settable and organic ingredients166/295, Organic material is resin or resinous501/33, Beads166/291, With piston separator525/111, With reactant which is free of an 1,2-epoxy group and which contains a -N=C=X group or polymer thereof (X is chalcogen); or with a polyol and a polycarboxylic acid or reaction product thereof which is free of an 1,2 epoxy group507/269, Contains inorganic component other than water or clay166/294, Cement or consolidating material is organic or has organic ingredient166/194, With sleeve valve106/802Organic material containingExaminersPrimary: Marcantoni, PaulAttorney, Agent or FirmForeign Patent References
International ClassesC04B014/22C04B007/00 AbstractThe present invention provides methods of cementing pipe in well bores and low density cement compositions having enhanced compressive, tensile and bond strengths upon setting. The composition of the invention are basically comprised of a hydraulic cement, sufficient water to form a slurry and hollow glass microspheres surface treated with a mixture of organosilane coupling agents present in an amount sufficient to produce a cement composition density in the range of from about 6 to about 12 pounds per gallon.Other References
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