WELL CLOSING DEVICE AND TEMPORARY WELL CLOSING METHOD

Title:

WELL CLOSING DEVICE AND TEMPORARY WELL CLOSING METHOD

Document Type and Number:

WIPO Patent Application WO/2018/198881

Kind Code:

A1

Abstract:

The present invention addresses the problem of providing a well closing device capable of reducing costs and shortening a process for boring a well, and a method for temporarily closing the well by using the well closing device. This well closing device includes: a down hole plug; a setting tool (2) for operating and installing the down hole plug; and an obstacle for closing the flow passage of the down hole plug, wherein the obstacle is included in the setting tool (2), and thus the flow passage of the down hole plug can be reliably closed in a short time after installing the down hole plug inside a well and removing the setting tool (2). In addition, by using this well closing device, the well can be temporarily closed reliably in a short time.

Inventors:

YOSHIDA HIROAKI (JP)
KOBAYASHI TAKUMA (JP)

Application Number:

PCT/JP2018/015857

Publication Date:

November 01, 2018

Filing Date:

April 17, 2018

Export Citation:

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Assignee:

KUREHA CORP (JP)

International Classes:

E21B33/12

Foreign References:

US20110277987A1	2011-11-17
US20050205266A1	2005-09-22
US20080066917A1	2008-03-20
US20110240295A1	2011-10-06
US20080202764A1	2008-08-28