Title:
A DOWNHOLE DOWNHOLE ASSEMBLY, TOOL AND METHOD
Document Type and Number:
WIPO Patent Application WO/2013/167954
Kind Code:
A3
Abstract:
The present invention is related a reaming insert for a reaming tool, characterized in that said reaming insert comprises a reaming portion having the shape of a truncated dome. According to a second aspect, the invention is related to a reaming tool comprising a body having a reaming gauge portion characterized in that said reaming gauge portion comprises reaming inserts comprising a reaming portion having the shape of a truncated dome. In a further aspect, the invention is related to a downhole assembly comprising a bottom hole assembly for drilling a borehole, the bottom hole assembly comprising : a housing having a longitudinal axis, a front end and a tail end, and a drilling tool mounted at the front end; the downhole assembly being characterized in that if further comprises said reaming tool. In another aspect, a method of reaming a borehole is provided and comprising the steps of: a) providing said downhole assembly; b) attaching said downhole assembly to a forward end of a drillstring; c) drilling a pilot borehole until the downhole assembly reaches a target depth beneath surface; and d) withdrawing the drillstring from the borehole while rotating the reaming tool of the downhole assembly thereby reaming the borehole and eliminating borehole irregularities sufficiently to render the borehole ready for performing completion processes and preventing the BHA of the assembly from sticking while being withdrawn from the borehole.
More Like This:
| WO/1996/013648 | 2-STAGE UNDERREAMER |
| WO/2000/053887 | WELLBORE PRIMARY BARRIER AND RELATED SYSTEMS |
| WO/2009/006510 | PDC CUTTER WITH OVAL CROSS-SECTION |
Inventors:
ZAKI MAGDY M (EG)
AHMED OMAR (US)
AGUIB KARIM A (EG)
ADBEL-KADER AHMED GALAL (EG)
AHMED OMAR (US)
AGUIB KARIM A (EG)
ADBEL-KADER AHMED GALAL (EG)
Application Number:
PCT/IB2013/000890
Publication Date:
May 30, 2014
Filing Date:
May 08, 2013
Export Citation:
Assignee:
TERCEL IP LTD (GB)
International Classes:
E21B10/567; E21B10/26
Domestic Patent References:
| WO2004029402A1 | 2004-04-08 |
Foreign References:
| US3306381A | 1967-02-28 | |||
| GB2274129A | 1994-07-13 | |||
| US20090188725A1 | 2009-07-30 |
Attorney, Agent or Firm:
OSTYN, Frans (President Kennedypark 31 C, Kortrijk, BE)
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