公开(公告)号：US09903176B2

公开(公告)日：2018-02-27

申请号：US14622012

申请日：2015-02-13

申请人： Weatherford Technology Holdings, LLC

发明人： Varadaraju Gandikota ,  Lev Ring

IPC分类号： E21B33/127 ,  E21B43/10 ,  E21B23/06 ,  E21B33/12 ,  E21B33/128

CPC分类号： E21B33/127 ,  E21B23/06 ,  E21B33/1208 ,  E21B33/128 ,  E21B43/103

摘要： Methods and apparatus include tubing expanded to create a seal in an annulus surrounding the tubing. The tubing includes a sealing material selected to cause forming of undulations in a diameter of the tubing upon expansion of the tubing. Various factors of the sealing material such as deviations in its thickness influence sealing performance of the tubing with the sealing material.

公开(公告)号：US09169722B2

公开(公告)日：2015-10-27

申请号：US14227720

申请日：2014-03-27

申请人： Weatherford Technology Holdings, LLC

发明人： Richard W. DeLange ,  Scott H. Osburn ,  Varadaraju Gandikota ,  Ghazi J. Hashem

IPC分类号： E21B43/10

CPC分类号： E21B43/105 ,  E21B43/103 ,  E21B43/106 ,  E21B43/108

摘要： An expansion tool for use in a wellbore includes an expansion surface made up of a concave portion, a convex portion and a straight section therebetween. The straight section is formed according to a formula Y=(1.26)(X)−0.13, where X is the wall thickness of a tubular and Y is the length of the straight section. The concave portion and the convex portion have an arc length extending the concave portion to a trailing edge of the tool. The concave and convex portions are radius-shaped. The arrangement of the shapes and their relation to each other reduces relatively high and low contact pressures and lessens the effects of axial bending in a tubular or a connection.

摘要翻译： 用于井眼的膨胀工具包括由凹部，凸部和直线部分构成的膨胀面。 直线部分根据公式Y =（1.26）（X）-0.13形成，其中X是管的壁厚，Y是直线部分的长度。 凹部和凸部具有将凹部延伸到工具的后缘的弧长。 凹凸部为半圆形。 形状和它们之间的关系的布置降低了相对较高和较低的接触压力，并减轻了管状或连接中轴向弯曲的影响。

公开(公告)号：US09551201B2

公开(公告)日：2017-01-24

申请号：US14156178

申请日：2014-01-15

申请人： Weatherford Technology Holdings, LLC

发明人： Lev Ring ,  Varadaraju Gandikota

IPC分类号： E21B33/12 ,  E21B33/124 ,  E21B23/06 ,  E21B43/10

CPC分类号： E21B33/12 ,  E21B23/06 ,  E21B33/1208 ,  E21B33/124 ,  E21B43/103 ,  E21B43/105

摘要： Methods and apparatus include an expandable packer having a tubing expanded to create a seal in an annulus surrounding the tubing. The tubing includes a non-uniform outer surface configured to cause formation of undulations in a diameter of the tubing upon expansion of the tubing. A plurality of expandable packers may be connected to a tubular string to isolate multiple zones in a wellbore. A production tubular equipped with multiple expandable packers may be installed in the tubular string. The expandable packers may also include non-uniform outer surfaces configured to form undulations upon expansion. The combination of tubular string and production tubular may be used in an enhanced oil recovery application such as injecting steam into a formation to enhance production.

摘要翻译： 方法和装置包括具有膨胀以在围绕管道的环形空间中产生密封的管道的可膨胀封隔器。 管道包括非均匀的外表面，其构造成在管道膨胀时引起管道直径的起伏形成。 多个可膨胀封隔器可以连接到管状管柱以隔离井眼中的多个区域。 装配有多个可膨胀封隔器的生产管状体可以安装在管状管柱中。 可膨胀封隔器还可以包括构造成在膨胀时形成起伏的不均匀的外表面。 管状串和生产管的组合可用于增强的采油应用中，例如将蒸汽注入地层以增强生产。