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1.发明授权Well drilling and servicing fluids which deposit an easily removable filter cake 失效良好的钻井和维修流体，沉积易于拆卸的滤饼
公开(公告)号：US5783527A
公开(公告)日：1998-07-21
申请号：US732151
申请日：1996-10-16
CPC分类号： C09K8/52 , C09K8/08 , C09K8/206 , C09K8/514 , C09K2208/18 , Y10S507/906
摘要： The invention provides alkaline water base well drilling and servicing fluids which deposit an easily degradable and removable filter cake on the sides of a borehole during well drilling and servicing operations. The fluids contain one or more polysaccharide polymers, sized bridging particles, and a peroxide selected from the group consisting of alkaline earth metal peroxides, zinc peroxide, and mixtures thereof. The fluids deposit a filter cake containing the peroxide.
摘要翻译： 本发明提供碱性水基钻井和维修流体，其在钻井和维修操作期间在钻孔的侧面上沉积易于降解和可移除的滤饼。 流体含有一种或多种多糖聚合物，大小的桥连颗粒和选自碱土金属过氧化物，过氧化锌及其混合物的过氧化物。 流体沉积含有过氧化物的滤饼。
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公开(公告)号：US4822500A
公开(公告)日：1989-04-18
申请号：US161765
申请日：1988-02-29
CPC分类号： C09K8/90 , C09K8/08 , C09K2208/18 , Y10S507/903 , Y10S507/925
摘要： Disclosed are well working and treating fluids comprising a saturated aqueous saline solution, a particulate water soluble salt which is insoluble in the saturated saline solution, xanthomonas gum, and an epichlorohydrin crosslinked hydroxypropyl starch derivative wherein the xanthomonas gum and the epichlorohydrin crosslinked hydroxypropyl starch derivative interact to synergistically enhance the suspension characteristics of the fluid and to decrease the fluid loss of the fluid.Also disclosed is an additive composition for enhancing the suspension characteristics and reducing the fluid loss of saturated brine based well treating fluids comprising specified proportions of xanthomonas gum and epichlorohydrin crosslinked hydroxypropyl starch.
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3.发明授权Well drilling and servicing fluids which deposit an easily removable filter cake 失效良好的钻井和维修流体，沉积易于拆卸的滤饼
公开(公告)号：US5607905A
公开(公告)日：1997-03-04
申请号：US212814
申请日：1994-03-15
CPC分类号： C09K8/52 , C09K8/08 , C09K8/206 , C09K8/514 , C09K2208/18 , Y10S507/906
摘要： The invention provides alkaline water base well drilling and servicing fluids which deposit an easily degradable and removable filter cake on the sides of a borehole during well drilling and servicing operations. The fluids contain one or more polysaccharide polymers, sized bridging particles, and a peroxide selected from the group consisting of alkaline earth metal peroxides, zinc peroxide, and mixtures thereof. The fluids deposit a filter cake containing the peroxide. The invention also provides processes for enhancing the removal of the filter cake which comprises depositing a peroxide-containing filter cake on the sides of the borehole, or on the filter cake already present on the sides of the borehole, and thereafter contacting the peroxide-containing filter cake with an acidic solution to activate the peroxide which thereafter degrades the polysaccharide polymers in the filter cake. Preferably the filter cake containing the degraded polymer is washed with a fluid in which the bridging particles are soluble to remove the entire filter cake(s) from the sides of the borehole.
摘要翻译： 本发明提供碱性水基钻井和维修流体，其在钻井和维修操作期间在钻孔的侧面上沉积易于降解和可移除的滤饼。 流体含有一种或多种多糖聚合物，大小的桥连颗粒和选自碱土金属过氧化物，过氧化锌及其混合物的过氧化物。 流体沉积含有过氧化物的滤饼。 本发明还提供了用于增强滤饼去除的方法，其包括在钻孔的侧面上沉积含过氧化物的滤饼，或者在已经存在于钻孔的侧面上的滤饼上，然后使含过氧化物的滤饼 滤饼用酸性溶液活化过氧化物，其后降解滤饼中的多糖聚合物。 优选地，含有降解的聚合物的滤饼用其中桥接颗粒可溶的流体洗涤以从钻孔的侧面去除整个滤饼。
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公开(公告)号：US06576597B2
公开(公告)日：2003-06-10
申请号：US09970831
申请日：2001-10-04
IPC分类号： C09K702
CPC分类号： C09K8/90 , C09K8/08 , C09K2208/18 , Y10S507/906 , Y10S507/925
摘要： Disclosed is a method of increasing the low shear rate viscosity and the shear thinning index of aqueous fluids containing a divalent cation salt, a crosslinked amylopectin starch which functions as both a viscosifier/suspending agent and as a fluid loss control additive, and a bridging agent, the fluids resulting from the method, and the use of the fluids in drilling a well, wherein the bridging agent is a sized particulate magnesium carbonate or a mixture of sized magnesium carbonate and sized calcium carbonate. The median (D50) particle size of the magnesium carbonate is from about 2 &mgr;m to about 10 &mgr;m. The weight ratio of calcium carbonate to magnesium carbonate is from about 70/30 to about 0/100.
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5.发明授权Method of increasing the low shear rate viscosity of well drilling and servicing fluids containing calcined magnesia bridging solids, the fluids and methods of use 有权提高含有煅烧氧化镁桥接固体的钻井和维修流体的低剪切速率粘度的方法，流体和使用方法公开(公告)号：US07211546B2
公开(公告)日：2007-05-01
申请号：US10901822
申请日：2004-07-29
IPC分类号： C09K8/04
CPC分类号： C09K8/08 , C09K2208/18
摘要： The invention provides well drilling and servicing fluids, and methods of drilling, completing, or working over a well therewith, preferred fluids comprise an aqueous liquid, a water soluble polymer viscosifier (preferably xanthan gum), a polymeric fluid loss control additive (preferably a partially depolymerized partially crosslinked hydroxyalkyl ether derivative of starch or a hydroxyalkyl ether derivative of a partially crosslinked and partially depolymerized starch), a bridging agent comprising a particulate calcined magnesia that has an Activity Index greater than about 800 seconds, and citric acid in an amount sufficient to increase the low shear rate viscosity of the fluids. The invention further provides a method of increasing the low shear rate viscosity of fluids which contain a water soluble polymer and a calcined magnesia bridging agent which has an Activity Index greater than about 800 seconds.
摘要翻译： 本发明提供了良好的钻井和维修流体，以及钻井，完井或在其上工作的方法，优选的流体包括水性液体，水溶性聚合物增粘剂（优选黄原胶），聚合物流体损失控制添加剂 部分解聚的部分交联的羟烷基醚衍生物或部分交联和部分解聚的淀粉的羟烷基醚衍生物），包含活性指数大于约800秒的颗粒状煅烧氧化镁的桥连剂和足够量的柠檬酸 以增加流体的低剪切速率粘度。 本发明还提供了一种增加含有水溶性聚合物和煅烧氧化镁桥接剂的流体的低剪切速率粘度的方法，其具有大于约800秒的活性指数。
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6.发明授权Method of increasing the low shear rate viscosity of well drilling and servicing fluids containing calcined magnesia bridging solids, the fluids and methods of use 有权提高含有煅烧氧化镁桥接固体的钻井和维修流体的低剪切速率粘度的方法，流体和使用方法公开(公告)号：US07214647B2
公开(公告)日：2007-05-08
申请号：US11011659
申请日：2004-12-14
IPC分类号： C09K8/04
CPC分类号： C09K8/10 , C09K8/08 , C09K2208/18
摘要： The invention provides well drilling and servicing fluids, and methods of drilling, completing, or working over a well therewith, preferred fluids comprise an aqueous liquid, a water soluble polymer viscosifier (preferably xanthan gum), a polymeric fluid loss control additive (preferably a partially depolymerized partially crosslinked hydroxyalkyl ether derivative of starch or a hydroxyalkyl ether derivative of a partially crosslinked and partially depolymerized starch), a bridging agent comprising a particulate calcined magnesia that has an Activity Index greater than about 800 seconds, and an additive selected from the group consisting of citric acid, alkali metal salts of citric acid, ammonium citrate, and mixtures thereof in an amount sufficient to increase the low shear rate viscosity of the fluids, preferably from about 0.05–5 ppb, most preferably from about 0.15–3 ppb. The invention further provides a method of increasing the low shear rate viscosity of fluids which contain a water soluble polymer and a calcined magnesia bridging agent which has an Activity Index greater than about 800 seconds.
摘要翻译： 本发明提供了良好的钻井和维修流体，以及钻井，完井或在其上工作的方法，优选的流体包括水性液体，水溶性聚合物增粘剂（优选黄原胶），聚合物流体损失控制添加剂 部分解聚的部分交联的羟烷基醚衍生物或部分交联和部分解聚的淀粉的羟烷基醚衍生物），包含活性指数大于约800秒的颗粒状煅烧氧化镁的桥连剂和选自下组的添加剂 由柠檬酸，柠檬酸的碱金属盐，柠檬酸铵及其混合物组成，其量足以增加流体的低剪切速率粘度，优选约0.05-5ppb，最优选约0.15-3ppb。 本发明还提供了一种增加含有水溶性聚合物和煅烧氧化镁桥接剂的流体的低剪切速率粘度的方法，其具有大于约800秒的活性指数。
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7.发明授权Method of decreasing the loss of fluid during workover and completion operations 有权降低修井和完井作业过程中流体损失的方法公开(公告)号：US06325149B1
公开(公告)日：2001-12-04
申请号：US09510320
申请日：2000-02-22
IPC分类号： E21B4316
CPC分类号： E21B21/003 , C09K8/506 , E21B43/04
摘要： The invention provides solids-free, viscous fluids (pills) for use in various well workover and completion operations including as displacement spacer pills, standard fluid loss control pills, post gravel pack in-screen pills, perforation sealing, and the like. The pills comprise a viscous solution of a polyethylene glycol having a molecular weight of 1,000 to 8,000,000 in an aqueous liquid comprising a solution of one or more soluble bromide salts having a density sufficient to provide the desired hydrostatic pressure at the location of use of the fluid in a well. The minimum concentration of the polyethylene glycol in the pill varies with the average molecular weight as follows: MW=1,000 to 10,000=100 ppb; MW=10,001 to 100,000=75 ppb; MW=100,001 to 250,000=50 ppb; MW=250,001 to 500,000=10 ppb; MW=500,001 to 8,000,000=5 ppb.
摘要翻译： 本发明提供了用于各种修井和完井操作的无固体，粘性流体（丸剂），包括作为置换间隔丸，标准流体损失控制丸，砾石填充屏幕丸，穿孔密封等。 丸剂包含分子量为1,000至8,000,000的聚乙二醇的粘稠溶液，该水溶液包含一种或多种可溶性溴化物盐的溶液，该溶液具有足以在使用流体的位置提供所需的静水压力 在一个井 丸剂中聚乙二醇的最小浓度随平均分子量的变化如下：MW = 1,000至10,000 = 100ppb; MW = 10,001至100,000 = 75ppb; MW = 100,001至250,000 = 50ppb; MW = 250,001至500,000 = 10ppb; MW = 500,001至8,000,000 = 5 ppb。
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8.发明授权Process to enhance removal of adhering solids from the surface of wellbores and sand control devices therein 失效加强从其中的井眼和砂控制装置的表面去除附着的固体的方法
公开(公告)号：US5783526A
公开(公告)日：1998-07-21
申请号：US810822
申请日：1997-03-06
CPC分类号： C09K8/52 , Y10S507/923 , Y10S507/933 , Y10S507/934
摘要： The invention provides: (1) a process to enhance the removal of solids such as clays, clay-like solids, and shale solids-drill solids-from the surface of a borehole, the solids being deposited from well drilling, completion, or workover fluids during well servicing operations; and (2) a process to enhance the removal of such solids from screens or other sand control devices present in a borehole. The process comprises contacting the solids with an acidic soak solution containing a polyglycol or mono ether derivative thereof and thereafter contacting the surface of the borehole with a wash solution to remove the solids from the borehole.
摘要翻译： 本发明提供：（1）从钻孔表面增强固体，例如粘土，粘土样固体和页岩固体 - 钻井固体的去除方法，固体由钻井，完井或修井 维修作业期间的液体; 和（2）增强从井眼中存在的筛网或其它防砂装置中除去这种固体的方法。 该方法包括使固体与含有聚二醇或其单醚衍生物的酸性浸泡溶液接触，然后使钻孔表面与洗涤溶液接触以从钻孔中除去固体。
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9.发明授权公开(公告)号：US07897544B2
公开(公告)日：2011-03-01
申请号：US11305602
申请日：2005-12-16
IPC分类号： C09K8/32
CPC分类号： C09K8/34 , C09K8/32 , C09K2208/18
摘要： The invention discloses a compounded hydrocarbon oil which comprises a base hydrocarbon oil, preferably a mixture of paraffinic hydrocarbons, propylene carbonate, and a liquid fatty acid containing at least 12 carbon atoms per molecule, preferably tall oil fatty acid. The volume ratio of propylene carbonate to liquid fatty acid is from about 3.5 to 1 to about 7 to 1. Preferably the concentration of propylene carbonate is from about 0.002 gal/gal oil to about 0.0057 gal/gal oil and the concentration of the liquid fatty acid is from about 0.0003 gal/gal oil to about 0.0015 gal/gal oil. The invention further comprises a method of compounding the compounded hydrocarbon oil and an oil base drilling fluid prepared from the compounded hydrocarbon oil. Preferably the compounded hydrocarbon oil is characterized by an increase in the low shear rate viscosity of the oil of at least 5,000 centipoise or mixing 7.5 lb/bbl of an organoclay therein.
摘要翻译： 本发明公开了一种复合烃油，其包含基础烃油，优选链烷烃，碳酸亚丙酯和每分子含有至少12个碳原子的液体脂肪酸的混合物，优选妥尔油脂肪酸。 碳酸丙烯酯与液体脂肪酸的体积比为约3.5至1至约7:1。优选碳酸亚丙酯的浓度为约0.002gal / gal油至约0.0057gal / gal油，并且液体脂肪酸的浓度 酸为约0.0003加仑/加仑油至约0.0015加仑/加仑油。 本发明还包括将复合烃油和由复合烃油制备的油基钻井液混合的方法。 优选地，复合烃油的特征在于油的低剪切速率粘度增加至少5000厘泊或者混合7.5lb / bbb的有机粘土。
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公开(公告)号：US07018956B2
公开(公告)日：2006-03-28
申请号：US10320145
申请日：2002-12-16
IPC分类号： C09K8/04
CPC分类号： C09K8/887 , C09K8/62 , C09K8/685 , Y10S507/903 , Y10S507/922
摘要： Disclosed is a concentrate composition for crosslinking polysaccharide polymers hydrated in an aqueous liquid, and well servicing fluids, preferably fracturing fluids, prepared therewith. Preferred polysaccharide polymers are galactomannan gums or derivatives thereof, preferably hydroxypropylguar. The concentrate comprises an alkali metal formate solution, preferably potassium formate, a crosslinking agent for the polysaccharide polymer, preferably a sparingly soluble alkali metal or alkali metal alkaline earth metal borate, and a suspension agent, preferably a clay mineral selected from the group consisting of smectite clays, palygorskite clays, and mixtures thereof Exemplary clays are hectorite, sepiolite, and attapulgite. The concentrate may, optionally, contain a deflocculant and/or an anti-syneresis additive.
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