Lettvekts brønnsementblanding, additiv for slik blanding og bruk av slik blanding

• Main Authors: Keener, Krista L, Brothers, Lance Everett, Braden, James A
• Format: Patent
• Language: Norwegian
• Published: 27.08.2018
• Subjects: ADHESIVES; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DYES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF NATURAL STONE

Lettvekts sementblandmg omfattende en hydraulisk sement, vami og et additiv omfattende en suspensjon av mikrosfærer i vann tyknet med natrium-bentonitt. Oppfinnelsen omhandler også en fremgangsmåte ved anvendelse av sementblandingen i et ringrom mellom et rør og veggene i en borebrøtm, for å tette soner eller formasjoner som lett sprekker opp under lave hydrostatiske trykk. Lightweight well cement compositions, comprised of a hydraulic cement, water and an additive comprising a suspension of microspheres in water gelled with sodium bentonite, are used in the annulus between a pipe and the well bore for sealing the pipe in zones or formations which readily fracture at low hydrostatic pressure.