公开(公告)号：US5832998A

公开(公告)日：1998-11-10

申请号：US433787

申请日：1995-05-03

申请人： Kenneth L. Decker ,  John H. Yonker ,  Wallace G. Wilke, Jr. ,  Jeffrey S. Walter ,  James C. Tucker ,  Kenneth W. McIntyre ,  Michael L. Connell ,  Kenneth D. Caskey

发明人： Kenneth L. Decker ,  John H. Yonker ,  Wallace G. Wilke, Jr. ,  Jeffrey S. Walter ,  James C. Tucker ,  Kenneth W. McIntyre ,  Michael L. Connell ,  Kenneth D. Caskey

IPC分类号： E21B23/00 ,  E21B33/127

CPC分类号： E21B23/006 ,  E21B33/127

摘要： A resettable well stimulation tool is lowerable into a well bore on a length of tubing through which pressurized fluid may be forced into the tool to inflate a packer portion carried by the tool and then discharge a stimulation fluid into a portion of the well bore sealed off by the packer portion. During the inflation cycle of the tool pressurized fluid is forced downwardly into an annular tool body inflation chamber that communicates with an inflatable packer carried by the tool body. A perforated tube member coaxially carried in the inflation chamber serves to vertically distribute the inflation pressure along the length of the packer and assure its even inflation. In a straddle packer embodiment of the tool inflation and stimulation passages extend internally through the tool and are sealingly separated by an internal crossover structure, with the inflation passage being in communication with upper and lower packer members. The internal inflation passage eliminates the previous necessity of communicating the upper and lower packers with inflation tubing externally coiled around the tool body. A longitudinally intermediate portion of the tool body has a telescoping expansion joint portion to compensate for the longitudinal forces exerted on the body by inflation of the packers. The expansion joint is biased, by both mechanical spring pressure and internal fluid pressure, toward a retracted position thereof.

摘要翻译： 可重置的井刺激工具可以降低到一段管道上的井眼中，加压流体可以通过该管道被迫进入工具中，以使由工具承载的封隔器部分膨胀，然后将刺激流体排放到密封的井筒的一部分中 通过封隔器部分。 在工具的充气循环期间，加压流体被迫向下进入与由工具主体承载的充气封隔器连通的环形工具体充气室。 同轴地承载在充气室中的穿孔管构件用于沿着封隔器的长度垂直分布充气压力并确保其均匀的充气。 在跨越打包器的实施例中，工具膨胀和刺激通道在内部延伸穿过工具，并且通过内部交叉结构密封地分开，充气通道与上部和下部封隔器构件连通。 内部充气通道消除了先前需要将上部和下部封隔器与外部盘绕在工具体上的充气管连通的需要。 工具主体的纵向中间部分具有伸缩式膨胀接头部分，以通过封隔器的充气来补偿作用在身体上的纵向力。 膨胀接头通过机械弹簧压力和内部流体压力被偏压到其缩回位置。