公开(公告)号：US5890537A

公开(公告)日：1999-04-06

申请号：US805782

申请日：1997-02-25

申请人： Gilbert Lavaure ,  Jason Jonas ,  Bernard Piot

发明人： Gilbert Lavaure ,  Jason Jonas ,  Bernard Piot

IPC分类号： E21B33/05 ,  E21B33/00

CPC分类号： E21B33/16 ,  E21B33/05

摘要： A wiper plug launching tool includes a body arranged to be lowered into a liner on a running string, the body having a tubular upper portion and a cylindrical lower portion, upper and lower wiper plugs loaded into the lower portion, each of the plugs having upwardly facing elastomer cups that are reduced in diameter during loading, a drive rod movably mounted in the upper portion of the body, a first piston or dart that is pumped down the running string and into engagement with the drive rod so that pressure applied to the first dart forces the rod downward to cause ejection of the lower wiper plug into the liner where cups of the plug expand to provide a moving seal at the lower end of a column of cement, and a second piston or dart that is pumped down into engagement with the first dart to force the rod further downward and cause ejection of the upper wiper plug into the liner where the cups of this plug expand to provide a moving seal at the upper end of the column of cement. A slidable valve is provided adjacent the upper end of the drive rod and is effective to close lateral flow ports upon downward movement of a dart and initial engagement with the drive rod. The drive rod has a piston mounted within a cylinder for cushioned movement upon metering of hydraulic fluid between the piston and cylinder during downward movement of the drive rod. A modification of the invention shown in FIGS. 9-11 utilizes three wiper plugs for sealing the liner.

摘要翻译： 刮水器插头发射工具包括主体，该主体被布置成在行进的弦上下降到衬垫中，该主体具有管状的上部和圆柱形下部，上部和下部擦拭器插头装入下部，每个插头具有向上的 在加载期间直径减小的弹性体杯，可移动地安装在主体的上部的驱动杆，沿着运行柱泵送并与驱动杆接合的第一活塞或飞镖，使得施加到第一 飞镖迫使杆向下以使下部雨刮器弹出到衬垫中，其中杯塞膨胀以在水泥柱的下端提供移动的密封，并且将第二活塞或飞镖泵送到与 第一个飞镖将杆进一步向下推动，并使上擦拭器塞进入衬套中，其中该塞子的杯膨胀，以在水泥塔的上端提供移动的密封。 在驱动杆的上端附近设置有可滑动的阀，并且在向后移动飞镖并与驱动杆初始接合时有效地闭合侧向流动端口。 驱动杆具有安装在气缸内的活塞，用于在驱动杆向下运动期间计量活塞和气缸之间的液压流体时进行缓冲运动。 图1和图2所示的本发明的修改。 9-11使用三个刮水器塞密封衬管。

公开(公告)号：US07231975B2

公开(公告)日：2007-06-19

申请号：US10492398

申请日：2002-09-25

申请人： Gilbert Lavaure ,  Claude Vercaemer ,  Dominique Guillot ,  Marc Thiercelin

发明人： Gilbert Lavaure ,  Claude Vercaemer ,  Dominique Guillot ,  Marc Thiercelin

IPC分类号： E21B33/00

CPC分类号： E21B33/138 ,  E21B33/134 ,  E21B33/14

摘要： A method for stabilising an unconsolidated zone (18) of a borehole, by forming a region of the borehole having enlarged diameter (22) in the unconsolidated zone; positioning a fluid-filled casing (26) in the borehole the liner having a pipe (28) extending therethrough into a lower portion; pumping cement from the surface inside the pipe so as to exit the liner at the lower portion and flow upwards to fill the annulus (44) formed between the outside of the liner and the borehole in the unconsolidated zone; withdrawing the pipe (28) from the casing while pumping fluid therethrough so as to maintain the liner substantially fluid-filled and to displace cement above the liner in the adjacent region; drilling through the cement and liner in the unconsolidated zone after the cement has set.

摘要翻译： 一种用于通过在所述未固结区域中形成具有增大的直径（22）的钻孔区域来稳定钻孔的未固结区域（18）的方法; 将流体填充的壳体（26）定位在钻孔中，衬套具有穿过其延伸到下部的管（28）; 从管道内的表面抽出水泥，以便在下部离开衬套并向上流动以填充形成在衬套的外部和未固结区域中的钻孔之间的环（44）; 从外壳抽出管道（28），同时泵送流体通过其中，以便保持衬套基本上是流体填充的，并且使相邻区域中的衬套上方的水泥置换; 在水泥固化之后，通过未固结区域的水泥和衬管进行钻孔。

公开(公告)号：US5165474A

公开(公告)日：1992-11-24

申请号：US718068

申请日：1991-06-21

申请人： Paul Buisine ,  Gilbert Lavaure

发明人： Paul Buisine ,  Gilbert Lavaure

IPC分类号： E21B33/16

CPC分类号： E21B33/16

摘要： Cement plugs used in the cementing of casing in a borehole drilled into a subterranean formation are restrained from rotation by being forced into a portion of the casing and check valve apparatus which includes a reduced diameter section formed as a continuous annular liner of material having a coefficient of friction. Compression of the plug against the high-friction liner avoids rotation of the plugs when they are drilled subsequent to the cementing operation.