公开(公告)号：US06802372B2

公开(公告)日：2004-10-12

申请号：US10208724

申请日：2002-07-30

申请人： Marcel Budde

发明人： Marcel Budde

IPC分类号： E21B3312

CPC分类号： E21B33/16 ,  E21B34/14

摘要： The present invention relates to an apparatus for dropping a ball into a wellbore. The apparatus is particularly useful for dropping a ball that has a diameter that is larger than the diameter of a bore within a wellbore tool above the apparatus. The ball-releasing apparatus first comprises a tubular body. The tubular body has a bore therethrough that is in fluid communication with the bore of the wellbore tool. A piston is placed within the tubular body. The piston has a top end disposed within the tubular body, and a bottom end disposed below the bore of the wellbore tool. The ball-releasing apparatus further comprises a connector for releasably connecting the piston to the ball. In one arrangement, the ball-releasing apparatus is connected to the bottom of a wiper plug for dropping a ball during a wellbore cementing operation. In one aspect, the ball is dropped by dropping a second ball having a diameter that will pass through the wellbore restriction, and then injecting fluid under pressure against the second smaller ball in order to actuate the releasable connection.

公开(公告)号：US07143831B2

公开(公告)日：2006-12-05

申请号：US10867960

申请日：2004-06-15

申请人： Marcel Budde

发明人： Marcel Budde

IPC分类号： E21B33/12

CPC分类号： E21B33/16 ,  E21B34/14

摘要： The present invention relates to an apparatus for dropping a ball into a wellbore. The apparatus is particularly useful for dropping a ball that has a diameter that is larger than the diameter of a bore within a wellbore tool above the apparatus. The ball-releasing apparatus first comprises a tubular body. The tubular body has a bore therethrough that is in fluid communication with the bore of the wellbore tool. A piston is placed within the tubular body. The piston has a top end disposed within the tubular body, and a bottom end disposed below the bore of the wellbore tool. The ball-releasing apparatus further comprises a connector for releasably connecting the piston to the ball. In one arrangement, the ball-releasing apparatus is connected to the bottom of a wiper plug for dropping a ball during a wellbore cementing operation. In one aspect, the ball is dropped by dropping a second ball having a diameter that will pass through the wellbore restriction, and then injecting fluid under pressure against the second smaller ball in order to actuate the releasable connection.

摘要翻译： 本发明涉及一种用于将球落入井眼的装置。 该装置特别适用于将直径大于装置内部的井眼工具中的孔的直径的球落下。 球释放装置首先包括管状体。 管状体具有穿过其中的孔，其与井眼工具的孔流体连通。 活塞被放置在管状体内。 活塞具有设置在管状体内的顶端，以及设置在井筒工具的孔下方的底端。 球释放装置还包括用于将活塞可释放地连接到球的连接器。 在一种布置中，滚珠释放装置连接到用于在井筒固井操作期间落球的雨刷的底部。 在一个方面，通过滴下具有将穿过井孔限制的直径的第二球，然后将压力下的液体注射到第二较小的球上以便致动可释放的连接，使球落下。