Invention Grant
- Patent Title: Method for recovering tubular structures from a well and a downhole tool string
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Application No.: US15536489Application Date: 2015-12-15
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Publication No.: US10240420B2Publication Date: 2019-03-26
- Inventor: Georges Emile Arnaly
- Applicant: Qinterra Technologies AS
- Applicant Address: NO Stavanger
- Assignee: Qinterra Technologies AS
- Current Assignee: Qinterra Technologies AS
- Current Assignee Address: NO Stavanger
- Agency: Gable Gotwals
- Priority: NO20141536 20141219
- International Application: PCT/NO2015/050244 WO 20151215
- International Announcement: WO2016/099282 WO 20160623
- Main IPC: E21B31/00
- IPC: E21B31/00 ; E21B29/00 ; E21B31/16 ; E21B23/01 ; E21B29/02 ; E21B29/08 ; E21B23/00

Abstract:
This invention relates to a method for recovering a tubular structure (3) from a well (1), wherein a so-called free point is defined as the location where the tubular structure is stuck in the well. The method comprising providing a downhole tool string comprising a pipe-severing tool and an upper part of the downhole tool string; lowering the downhole tool string into the tubular structure to release the free pipe. Before the step of triggering the pipe-severing tool to sever the tubular structure, the method includes releasing the pipe-severing tool and subsequent withdrawing the upper part, of the downhole tool string away from the free point towards the surface over at least a predefined distance. The invention relates to a downhole tool string for use in such method.
Public/Granted literature
- US20170328160A1 Method For Recovering Tubular Structures From A Well And A Downhole Tool String Public/Granted day:2017-11-16
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