Expansion tool assembly for expandable tubular

Patent metadata

Field	Value
Publication number	US-11293254-B2
Application number	US-202016908898-A
Country	US
Kind code	B2
Filing date	Jun 23, 2020
Priority date	Jun 23, 2020
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

Disclosed are an expansion tool assembly, comprising: an expandable tubular; a guide shoe partially inserted into and connected to the lower end of the expandable tubular; a sealing sleeve arranged in the expandable tubular and connected to the upper end of the guide shoe; an expansion assembly comprising an expansion cone and expansion seat disposed inside the expandable tubular, wherein the lower end of the expansion seat is connected with hooks, which can be rested on the upper end of the sealing sleeve; an upper joint that is connected to the upper end of the expansion seat and can be connected to a drill string. A force transfer path can be established via connection between the expansion seat and sealing sleeve, so that expandable tubular weight is borne on the drill string. Unintentional expansion of the expandable tubular, caused by interaction between expandable tubular and expansion cone, can be avoided.

First claim

The invention claimed is:

1. An expansion tool assembly for expandable tubular, comprising:
an expandable tubular;
a guide shoe partially inserted into and connected to the lower end of the expandable tubular;
a sealing sleeve arranged in the expandable tubular and connected to the upper end of the guide shoe;
an expansion assembly comprising an expansion cone and an expansion seat disposed inside the expandable tubular, wherein the lower end of the expansion seat is connected with hooks, which are configured to rest on the upper end of the sealing sleeve; and
an upper joint that is connected to the upper end of the expansion seat and is be connected to a drill string wherein
the lower end of the expansion seat is connected with a plurality of hooks arranged at an interval in the circumferential direction, the inner wall of the upper end of the sealing sleeve is provided with grooves, and the hooks are inserted into the upper end of the sealing sleeve and rest in the grooves.

2. The expansion tool assembly for expandable tubular according to claim 1 , wherein the hooks can move elastically in the radial direction.

3. The expansion tool assembly for expandable tubular according to claim 2 , comprising a plug seat disposed inside the expandable tubular, wherein the lower end of the plug seat is connected to the guide shoe, and the plurality of hooks surround the plug seat.

4. The expansion tool assembly for expandable tubular according to claim 3 , wherein the outer circumferential surface of the plug seat is provided with annular protrusions for supporting the hooks.

5. The expansion tool assembly for expandable tubular according to claim 4 , wherein the upper end of the plug seat is sealingly inserted into the expansion seat, the lower end of the plug seat is sealingly inserted into the guide shoe, and the plug seat and the guide shoe are connected via a radially extending shear pin,
wherein the plug seat can shear off the shear pin under the action of downward pressure and move downward with respect to the guide shoe to disengage from the expansion seat, after the annular protrusions disengage from the hooks.

6. The expansion tool assembly for expandable tubular according to claim 5 , comprising a drill string plug that is configured to be displaced along the drill string and move into the plug seat under the action of downward pressure and exert downward pressure on the plug seat.

7. The expansion tool assembly for expandable tubular according to claim 5 , wherein the lower end of the expansion seat is spline-fitted with the sealing sleeve, the expansion seat is moveable axially with respect to the sealing sleeve, and the upper joint is detachably connectable with the expansion seat through threads.

8. The expansion tool assembly for expandable tubular according to claim 1 , wherein the guide shoe comprises a tubular portion inserted into the expandable tubular and a ball head portion located outside the expandable tubular, a stepped surface supporting the lower end of the expandable tubular is formed between the ball head portion and the tubular portion, and the tubular portion is connected with the expandable tubular through threads.

9. The expansion tool assembly for expandable tubular according to claim 1 , wherein the expandable tubular comprises a first section, a second section, and a third section, which are sequentially arranged from bottom to top, wherein the outer diameter of the first section is greater than that of the third section, and the outer diameter of the second section is reduced in the direction from the first section to the third section.

10. The expansion tool assembly for expandable tubular according to claim 9 , wherein the expansion cone is supported on the upper side of the expansion seat, and the expansion cone is at least partially positioned in the second section.

11. The expansion tool assembly for expandable tubular according to claim 1 , wherein the drill string comprises a work drill string and a double-box connector connected to the lower end of the work drill string, wherein the double-box connector can be is clamped to the upper joint.

Assignees

• China Nat Petroleum Corp
• Cnpc Eng Tech Res & Dev Co Ltd

Inventors

• Zhang Quanli
• Xu Binggui
• Shi Depei
• Yin Hongwei
• Guo Huijuan
• Zhan Guodong
• Li Wanjun
• Guo Jianhua
• Jia Tao
• Han Fei
• Wang Jianli
• Zhu Yingjie
• Lv Mingjie
• Yang Yi
• Yu Yongliang
• Liu Zhitong
• Hou Fuxiang
• Hu Zhijian

Classifications

• E21B33/1295

  actuated by fluid pressure · CPC title

• E21B43/105 Primary

  Expanding tools specially adapted therefor · CPC title

• E21B33/1208 Primary

  characterised by the construction of the sealing or packing means (E21B33/1277 takes precedence) · CPC title