公开(公告)号：US20170145782A1

公开(公告)日：2017-05-25

申请号：US15351185

申请日：2016-11-14

Applicant: ConocoPhillips Company

Inventor： Thomas Eugene FERG

IPC: E21B33/13 ,  E21B43/114 ,  E21B47/00 ,  E21B33/134 ,  E21B29/00 ,  E21B43/10

CPC classification number: E21B33/13 ,  E21B29/002 ,  E21B33/134 ,  E21B43/103 ,  E21B43/105 ,  E21B43/114 ,  E21B47/00 ,  E21B47/0005

Abstract: The present invention discloses a method of plugging a well that relies on casing expansion to plug uncemented casing sections, rather than milling out the casing or perforate wash and cement (PWC).

公开(公告)号：US20160123110A1

公开(公告)日：2016-05-05

申请号：US14992217

申请日：2016-01-11

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Thomas Eugene FERG

IPC: E21B34/06 ,  E21B47/06 ,  E21B33/13

CPC classification number: E21B33/13 ,  E21B21/10 ,  E21B23/08

Abstract: A process for plugging a wellbore, e.g. an oil or gas well, comprises installing a choke device (1) into the wellbore in order to increase the back pressure to allow better control when introducing cement to plug the wellbore. The device (1) has a cylindrical shape with a central through bore (6). On the external profile is a shoulder (4) which, when the device is installed in a wellbore, comes to rest against a nipple in the wellbore. The device (1) may free fall for all or part of the way down but would normally be pumped down at least for the last part of its delivery. In the bore (6) is a pump out ball (10) which blocks the through bore until the device reaches the nipple and stops, at which point pressure increases and the ball is ejected. Cement and other liquid may then be pumped through the choke device to the distal region of the well.

Abstract translation: 堵塞井眼的方法，例如， 石油或天然气井，包括将扼流装置（1）安装到井筒中，以便增加背压，以便在引入水泥以堵塞井眼时能够更好地控制。 装置（1）具有带有中心通孔（6）的圆柱形形状。 在外部轮廓上是一个肩部（4），当装置安装在井眼中时，它会靠在井眼中的乳头上。 装置（1）可以全部或部分下降自由下落，但通常至少在其输送的最后部分被泵送。 在孔（6）中是泵出球（10），其堵塞通孔直到装置到达乳头并停止，此时压力增加并且球被弹出。 然后可以将水泥和其它液体泵送通过扼流装置到井的远端区域。