公开(公告)号：US08962533B2

公开(公告)日：2015-02-24

申请号：US13145893

申请日：2010-01-20

申请人： Franco Federici ,  Thierry Bossi ,  Christian Parisi ,  Luigi Merli ,  Daniele Moro ,  Pierangelo Pirovano ,  Giuseppe Li Bassi

发明人： Franco Federici ,  Thierry Bossi ,  Christian Parisi ,  Luigi Merli ,  Daniele Moro ,  Pierangelo Pirovano ,  Giuseppe Li Bassi

IPC分类号： C09K8/12 ,  C09K8/508 ,  C09K8/32

CPC分类号： C09K8/5083 ,  C09K8/32

摘要： A method for reducing filtrate loss of oil based drilling fluids comprising the following steps: a) preparing by emulsion polymerization an aqueous dispersion containing: i) from 20% to 60% by weight of a copolymer comprising from 60% to 90% by weight of styrene and/or vinyltoluene monomers, from 7 to 40% by weight of 2-ethylhexyl acrylate monomers and from 0.01 to 3% of polyfunctional unsaturated monomers; ii) from 40 to 80% by weight of water; iii) from 0.1% to 5% by weight of at least one surfactant; b) providing an oil based drilling fluid containing the aqueous dispersion obtained from step a), or its copolymer in powder form; c) injecting and circulating the drilling fluid in the borehole.

摘要翻译： 一种用于降低油基钻井液的滤液损失的方法，包括以下步骤：a）通过乳液聚合制备水分散体，其含有：i）20重量％至60重量％的包含60重量％至90重量％ 苯乙烯和/或乙烯基甲苯单体，7至40重量％的丙烯酸2-乙基己酯单体和0.01至3％的多官能不饱和单体; ii）40至80重量％的水; iii）0.1重量％至5重量％的至少一种表面活性剂; b）提供含有由步骤a）获得的水分散体或其粉末形式的共聚物的油基钻井液; c）在钻孔中注入和循环钻井液。

公开(公告)号：US20110281778A1

公开(公告)日：2011-11-17

申请号：US13145893

申请日：2010-01-20

申请人： Franco Federici ,  Thierry Bossi ,  Christian Parisi ,  Luigi Merli ,  Daniele Moro ,  Pierangelo Pirovano ,  Giuseppe Li Bassi

发明人： Franco Federici ,  Thierry Bossi ,  Christian Parisi ,  Luigi Merli ,  Daniele Moro ,  Pierangelo Pirovano ,  Giuseppe Li Bassi

IPC分类号： C09K8/12

CPC分类号： C09K8/5083 ,  C09K8/32

摘要： A method for reducing filtrate loss of oil based drilling fluids comprising the following steps: a) preparing by emulsion polymerization an aqueous dispersion containing: i) from 20% to 60% by weight of a copolymer comprising from 60% to 90% by weight of styrene and/or vinyltoluene monomers, from 7 to 40% by weight of 2-ethylhexyl acrylate monomers and from 0.01 to 3% of polyfunctional unsaturated monomers; ii) from 40 to 80% by weight of water; iii) from 0.1% to 5% by weight of at least one surfactant; b) providing an oil based drilling fluid containing the aqueous dispersion obtained from step a), or its copolymer in powder form; c) injecting and circulating the drilling fluid in the borehole.

摘要翻译： 一种用于降低油基钻井液的滤液损失的方法，包括以下步骤：a）通过乳液聚合制备水分散体，其含有：i）20重量％至60重量％的包含60重量％至90重量％ 苯乙烯和/或乙烯基甲苯单体，7至40重量％的丙烯酸2-乙基己酯单体和0.01至3％的多官能不饱和单体; ii）40至80重量％的水; iii）0.1重量％至5重量％的至少一种表面活性剂; b）提供含有由步骤a）获得的水分散体或其粉末形式的共聚物的油基钻井液; c）在钻孔中注入和循环钻井液。