-
公开(公告)号：EP0948704B1
公开(公告)日：2004-12-15
申请号：EP97911804.9
申请日：1997-10-14
申请人： BJ SERVICES COMPANY
摘要： A method is provided for improving the effectiveness of cleaning up wells in a subterranean formation. The treatment is made more effective by first treating the well with a clean-up fluid that enzymatically degrades residual polymeric viscosifiers followed by removing solids contained in drill-in fluids.
-
公开(公告)号：EP0628130B1
公开(公告)日：1998-01-14
申请号：EP93905979.6
申请日：1993-02-19
申请人： BJ SERVICES COMPANY
IPC分类号： E21B43/26 , E21B43/25 , E21B33/138
CPC分类号： C09K8/685 , Y10S507/921 , Y10S507/922
-
3.发明授权METHOD OF DEGRADING CELLULOSE-CONTAINING FLUIDS DURING COMPLETION OPERATIONS OF OIL AND GAS WELLS 失效方法去除纤维素流体期间石油和天然气井收尾工作
公开(公告)号：EP0803024B1
公开(公告)日：2001-06-13
申请号：EP95944125.4
申请日：1995-12-29
申请人： BJ SERVICES COMPANY
IPC分类号： E21B43/25 , E21B43/26 , E21B33/138
-
公开(公告)号：EP0975708A1
公开(公告)日：2000-02-02
申请号：EP98908993.3
申请日：1998-03-06
申请人： BJ SERVICES COMPANY
CPC分类号： C09K8/90 , C04B24/38 , C09K8/08 , C09K8/46 , C12N9/88 , C12Y302/01004 , C12Y402/02012 , Y10S507/921 , C04B20/023
摘要： Xanthan molecules are degraded using a xanthanase enzyme complex that is stable at temperatures above 250 °F, such as those temperatures found in some wellbores and process streams. The xanthanase enzyme complex is produced by a novel soil bacterium. The xanthanase enzyme complex may be used to remove xanthan based formation damage, such as drilling filter-cakes and filtrates, or to remove xanthan based filter-cakes and/or residues present in processing equipment. The xanthanase enyzme complex may also be used to reduce the viscosity of xanthan-containing fluids, such as hydraulic fracturing fluids, blocking gels, drilling muds, and process fluids. The xanthanase enzyme complex may also be used in conjunction with other well or process treatments, such as stimulations and cementing operations, to improve the effectiveness of these treatments.
-
公开(公告)号：EP0975708B1
公开(公告)日：2005-02-09
申请号：EP98908993.3
申请日：1998-03-06
申请人： BJ SERVICES COMPANY
CPC分类号： C09K8/90 , C04B24/38 , C09K8/08 , C09K8/46 , C12N9/88 , C12Y302/01004 , C12Y402/02012 , Y10S507/921 , C04B20/023
摘要： Xanthan molecules are degraded using a xanthanase enzyme complex that is stable at temperatures above 250 °F, such as those temperatures found in some wellbores and process streams. The xanthanase enzyme complex is produced by a novel soil bacterium. The xanthanase enzyme complex may be used to remove xanthan based formation damage, such as drilling filter-cakes and filtrates, or to remove xanthan based filter-cakes and/or residues present in processing equipment. The xanthanase enyzme complex may also be used to reduce the viscosity of xanthan-containing fluids, such as hydraulic fracturing fluids, blocking gels, drilling muds, and process fluids. The xanthanase enzyme complex may also be used in conjunction with other well or process treatments, such as stimulations and cementing operations, to improve the effectiveness of these treatments.
-
公开(公告)号：EP0628130A1
公开(公告)日：1994-12-14
申请号：EP93905979.0
申请日：1993-02-19
申请人： BJ SERVICES COMPANY
IPC分类号： C09K8
CPC分类号： C09K8/685 , Y10S507/921 , Y10S507/922
摘要： L'invention concerne un procédé de fracturation d'une formation souterraine d'un puits de forage dans lequel on forme d'abord un fluide de fracturation gélifiable en le mélangeant avec un fluide aqueux, un polymère hydratable, un agent de réticulation approprié pour réticuler le polymère hydratable afin de former un gel polymère et un agent de rupture enzymatique. Le gel polymère réticulé est pompé du trou de forage à une pression suffisante pour fracturer la formation environnante. On permet à l'agent de rupture enzymatique de dégrader le polymère réticulé à temps afin de réduire la viscosité du fluide de façon à ce que le fluide puisse être pompé depuis le fond de la formation vers la surface du puits. L'agent de rupture enzymatique utilisé possède une activité d'un niveau de pH compris entre environ 2 et 11 et est efficace pour attaquer uniquement des liaisons spécifiques dans le gel polymère réticulé.
-
公开(公告)号：EP0948704A1
公开(公告)日：1999-10-13
申请号：EP97911804.0
申请日：1997-10-14
申请人： BJ SERVICES COMPANY
IPC分类号： C09K8
摘要： A method is provided for improving the effectiveness of cleaning up wells in a subterranean formation. The treatment is made more effective by first treating the well with a clean-up fluid that enzymatically degrades residual polymeric viscosifiers followed by removing solids contained in drill-in fluids.
-
公开(公告)号：EP0628129B1
公开(公告)日：1998-04-15
申请号：EP93905980.4
申请日：1993-02-19
申请人： BJ SERVICES COMPANY
IPC分类号： E21B33/138 , E21B43/26
-
9.发明公开METHOD OF DEGRADING CELLULOSE-CONTAINING FLUIDS DURING COMPLETION OPERATIONS OF OIL AND GAS WELLS 失效方法去除纤维素流体期间石油和天然气井收尾工作
公开(公告)号：EP0803024A1
公开(公告)日：1997-10-29
申请号：EP95944125.0
申请日：1995-12-29
申请人： BJ SERVICES COMPANY
IPC分类号： C09K8
摘要： A method is shown for reducing the viscosity of a cellulose-containing fluid used during workover, fracturing or well completion operations. An enzyme system is used to degrade the polymer, whereby the fluid can be removed from the subterranean formation to the well surface. The enzyme systems are effective over broad pH and temperature ranges.
-
-
-
-
-
-
-
-
搜索结果
9 条记录 (耗时 0.009 秒)
