Title:
A SYSTEM AND METHOD OF CLEANING AN ANNULAR AREA IN A WELL
Document Type and Number:
WIPO Patent Application WO/2019/078728
Kind Code:
A3
Abstract:
A system and method of cleaning an annular area in a well (2), comprising: - a first pipe body (4) and a surrounding second pipe body (6); - a first annulus (8) containing a clean fluid (10), and a surrounding second annulus (12) containing contaminants (14); - a plurality of sets of holes (22) formed through the pipe bodies (4, 6) and dispersed along a longitudinal section (L), each set of holes (22) comprising holes (22a, 22b) aligned substantially radially; and - a washing tool (26) positioned in the first pipe body (4) and comprising spaced apart flow guides (28a, 28b) configured to enclose of a limited number of sets of holes (22), the flow guides (28a, 28b) cooperating with an inside of the first pipe body (4) to form a confined pressure compartment (30) for the limited number of sets of holes (22) when operational in the well (2).
Inventors:
MYHRE MORTEN (NO)
LARSEN ARNE GUNNAR (NO)
ØSTVOLD ARNOLD (NO)
LARSEN ARNE GUNNAR (NO)
ØSTVOLD ARNOLD (NO)
Application Number:
PCT/NO2018/050247
Publication Date:
August 01, 2019
Filing Date:
October 17, 2018
Export Citation:
Assignee:
HYDRA SYSTEMS AS (NO)
International Classes:
E21B21/00; E21B37/08; E21B33/13; E21B37/00; E21B43/114
Domestic Patent References:
WO2012096580A1 | 2012-07-19 | |||
WO2013133719A1 | 2013-09-12 |
Foreign References:
US5372198A | 1994-12-13 | |||
US20160010423A1 | 2016-01-14 | |||
EP2805010A1 | 2014-11-26 |
Other References:
See also references of EP 3698015A4
Attorney, Agent or Firm:
HÅMSØ PATENTBYRÅ AS (NO)
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