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    • 44. 发明申请
    • METHOD FOR REMOVING DRILL CUTTINGS FROM WELLBORES AND DRILLING FLUIDS
    • 从井筒和钻井液中移除钻孔切割的方法
    • WO2004000967A1
    • 2003-12-31
    • PCT/GB2003/002612
    • 2003-06-18
    • HALLIBURTON ENERGY SERVICES, INC.WAIN, Christopher, PaulNGUYEN, Philip, D.HARRIS, Philip, C.BECKER, Thomas, E.
    • NGUYEN, Philip, D.HARRIS, Philip, C.BECKER, Thomas, E.
    • C09K7/02
    • C09K8/10C09K8/08C09K8/12C09K8/206C09K8/24Y10S507/902Y10S507/903
    • A method is disclosed for drilling a wellbore employing a drilling fluid providing the advantages of easy pumpability of a low viscosity fluid with the drill cuttings suspension capability of a highly viscous fluid. The viscosity of the fluid is also easily and quickly adjustable so that the fluid rheology may be adapted during drilling as the subterranean conditions change. These advantages are obtained by including in said fluid a reversibly crosslinkable polymer and an encapsulated crosslink activator. The crosslink activator causes crosslinking after the fluid is in the wellbore. The crosslinking is reversed at the well surface to reduce the viscosity of the fluid to enable the drill cuttings to be easily removed. Crosslink activator is added back to the fluid and the fluid is returned to the borehole. The amount of crosslink activator and/or crosslinkable polymer may be adjusted in the fluid to change the fluid rheology to conform the fluid to changes in the well conditions as monitored real time.
    • 公开了一种使用钻井液钻井井的方法,其提供了具有高粘性流体的钻屑悬浮能力的低粘度流体容易泵送的优点。 流体的粘度也容易且快速地调节,使得流体流变学可以在钻井期间随着地下条件改变而适应。 这些优点通过在所述流体中包含可逆交联的聚合物和包封的交联活化剂来获得。 在液体在井眼中之后,交联活化剂引起交联。 交联在井表面反转,以降低流体的粘度,使得钻屑容易被去除。 将交联激活剂加回到流体中,并将​​流体返回到钻孔中。 可以在流体中调节交联活化剂和/或可交联聚合物的量以改变流体流变学以使流体符合实时监测的井条件变化。
    • 48. 发明申请
    • HYDROCARBON RECOVERY PROCESS UTILIZING A GEL PREPARED FROM A POLYMER AND A PREFORMED CROSSLINKING AGENT
    • 使用聚合物和预先形成的交联剂制备的凝胶的油墨回收方法
    • WO1995018909A1
    • 1995-07-13
    • PCT/US1994010763
    • 1994-09-22
    • MARATHON OIL COMPANY
    • MARATHON OIL COMPANYSYDANSK, Robert, D.
    • E21B33/138
    • C09K8/512Y10S507/903
    • A process and composition are provided for permeability reduction in a hydrocarbon-bearing formation to improve hydrocarbon recovery therefrom. The process includes placement of a crosslinked polymer gel in the treatment region preceded by surface preparation of a gelation solution which is the gel precursor. The gelation solution containing a crosslinkable polymer and chromium(III)/carboxylate complex crosslinking agent is prepared by preforming the crosslinking agent in isolation from the polymer and thereafter combining the crosslinking agent and polymer in solution. The starting materials for the complex crosslinking agent are an organic chromium(III) salt and a selected polycarboxylate or alpha-hydroxy carboxylate anion. The gel is placed in the treatment region by injecting the gelation solution into the formation, displacing it into the desired treatment region and gelling the solution to completion forming the permeability-reducing gel in situ.
    • 提供了一种方法和组合物,用于含烃地层中的渗透率降低以改善烃的回收。 该方法包括将交联聚合物凝胶放置在处理区域中,之后是凝胶化溶液的表面制备,其是凝胶前体。 含有可交联聚合物和铬(III)/羧酸盐络合物交联剂的凝胶化溶液通过与聚合物分离预先形成交联剂,然后将交联剂和聚合物在溶液中混合来制备。 复合交联剂的起始原料是有机铬(III)盐和选择的聚羧酸盐或α-羟基羧酸根阴离子。 通过将凝胶化溶液注入地层中将凝胶置于处理区域中,将其置换成所需的处理区域,并使溶液凝胶化,形成原位渗透性降低凝胶。