Solids in borehole fluids

A drilling fluid for use when drilling a borehole includes solid polymeric objects as a lost circulation additive. The objects have an overall size extending at least 0.5mm in each of three orthogonal dimensions have a shape such that each object has one or more edges, points or corners and/or compr...

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Bibliographic Details
Main Authors SNOSWELL DAVID ROBERT EVAN, WAY PAUL, COOK JOHN, BAILEY LOUISE, TUNC GOKTURK, JAMIE ELIZABETH ALICE GILCHRIST, ALDRED WALTER
Format Patent
LanguageChinese
English
Published 11.05.2016
Subjects
ADHESIVES
CHEMISTRY
DYES
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MINING
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
PAINTS
POLISHES
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Summary:A drilling fluid for use when drilling a borehole includes solid polymeric objects as a lost circulation additive. The objects have an overall size extending at least 0.5mm in each of three orthogonal dimensions have a shape such that each object has one or more edges, points or corners and/or comprises a core portion with a plurality of projections which extend out from the core portion. The objects may be moulded, 3D-printed or chopped from larger pieces of polymer by granulating machinery. Shapes with edges, points, corners or projections assisting the objects in lodging within and bridging a fracture encountered or formed while drilling.
Bibliography:Application Number: CN201480052419