公开(公告)号：US20040124013A1

公开(公告)日：2004-07-01

申请号：US10638903

申请日：2003-08-11

Applicant: Grain Processing Corporation

Inventor： Thomas A. Wiesner ,  David W. Abbott

IPC: E21B021/00

CPC classification number: C09K8/08 ,  C09K8/206 ,  C09K8/514

Abstract: Disclosed are drilling fluids suitable for use in connection with oil well drilling. The drilling fluids of the invention include in one embodiment a liquid base, an alkyl glucoside, such as methyl glucoside, and a borehole stability promoter that includes a maltodextrin, a carboxyalkyl starch, a hemicellulose-containing material, or a mixture of the foregoing. In another embodiment, the drilling fluid includes a liquid base and molasses solids, preferably in combination with an alkyl glucoside and more preferably in further combination with one of the aforementioned borehole stability promoters. In another embodiment, the drilling fluid includes sorbitol, preferably in conjunction with a borehole stability promoter. The drilling fluids of the invention surprisingly have a reduced tendency to swell shale as compared with known drilling fluids. Also disclosed are a drilling apparatus and process. The drilling apparatus includes a drill string, which may be conventional, that is fluidically coupled to a source of drilling fluid, the source of drilling fluid including the drilling fluid of the invention. The process of the invention includes the step of circulating the drilling fluid of the invention through a drill string during borehole drilling.

Abstract translation: 公开了适用于与油井钻井有关的钻井液。 本发明的钻井液在一个实施方案中包括液体碱，烷基葡糖苷如甲基葡糖苷，以及包含麦芽糖糊精，羧基烷基淀粉，含半纤维素的材料或前述物质的混合物的钻孔稳定性促进剂。 在另一个实施方案中，钻井流体包括液体基质和糖蜜固体，优选与烷基葡糖苷组合并且更优选地与上述井眼稳定性促进剂之一进一步组合。 在另一个实施方案中，钻井液包括山梨糖醇，优选与井眼稳定性促进剂结合。 与已知的钻井液相比，本发明的钻井液令人惊奇地具有减小页岩膨胀的倾向。 还公开了一种钻孔设备和方法。 钻井设备包括钻杆，其可以是常规的，其流体地联接到钻井流体源，钻井流体源包括本发明的钻井流体。 本发明的方法包括在钻孔期间使本发明的钻井液循环通过钻柱的步骤。