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International application No. Applicant's or agent's file reference
PCT/US2019/064485 063827.0852
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
04 December 2019 05 December 2018
FOR FURTHER ACTION: See Form PCT/ISA/220 as well as, where applicable, item 5 below.
This international search report has been prepared by this International Searching Authority and is transmitted to the applicant according to Article 18. A copy is being transmitted to the International Bureau.
It is also accompanied by a copy of each prior art document cited in this report.
1. Basis of the report
a. With regard to the language, the international search was carried out on the basis of:
the international application in the language in which it was filed.
a translation of the international application into                                          which is the language of a translation furnished for the purposes of international search (Rules 12.3(a) and 23.1(b)).
This international search report has been established taking into account the rectification of an obvious mistake authorized by or notified to this Authority under Rule 91 (Rule 43.6bis(a)).
With regard to any nucleotide and/or amino acid sequence disclosed in the international application, the international search was carried out on the basis of a sequence listing filed or furnished:
2. Certain claims were found unsearchable
3. Unity of invention is lacking
4. Title of the invention
The text is approved as submitted by the applicant.
The text has been established by this Authority to read as follows:
5. Abstract
The text is approved as submitted by the applicant.
The text has been established, according to Rule 38.2, by this Authority as it appears in Box No. IV. The applicant may, within one month from the date of mailing of this international search report, submit comments to this Authority.
6. Drawings
The figure of the drawings to be published with the abstract is Figure No.     1    
as suggested by the applicant.
as selected by this Authority, because the applicant failed to suggest a figure.
as selected by this Authority, because this figure better characterizes the invention.
none of the figures is to be published with the abstract.


     E21B 33/035 (2006.01)i; E21B 33/038 (2006.01)i; E21B 33/12 (2006.01)i; E21B 34/04 (2006.01)i
According to International Patent Classification (IPC) or to both national classification and IPC


Minimum documentation searched (classification system followed by classification symbols):
Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched:
Korean utility models and applications for utility models
Japanese utility models and applications for utility models
Electronic data base consulted during the international search (name of data base and, where practicable, search terms used):
eKOMPASS(KIPO internal) & Keywords: hanger, wellbore, string, barrier and valve


Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
US 2017-0089182 A1 (DRIL-QUIP INC.) 30 March 2017 paragraphs [0021]-[0043] and figures 1-8
US 2017-0211355 A1 (TRENDSETTER VULCAN OFFSHORE, INC.) 27 July 2017 paragraphs [0007]-[0012] and figures 1-6
US 2014-0060850 A1 (VOSS et al.) 06 March 2014 paragraphs [0003]-[0005] and figures 1-3
US 2012-0138159 A1 (WORDLEY et al.) 07 June 2012 paragraphs [0022]-[0024] and figures 3-9
US 2010-0071775 A1 (RATCLIFFE, ANTHONY JAMES) 25 March 2010 paragraphs [0007]-[0008] and figures 1-8
Special categories of cited documents:
document defining the general state of the art which is not considered to be of particular relevance
document cited by the applicant in the international application
earlier application or patent but published on or after the international filing date
document which may throw doubts on priority claim(s) or which is cited to establish the publication date of another citation or other special reason (as specified)
document referring to an oral disclosure, use, exhibition or other means
document published prior to the international filing date but later than the priority date claimed
later document published after the international filing date or priority date and not in conflict with the application but cited to understand the principle or theory underlying the invention
document of particular relevance; the claimed invention cannot be considered novel or cannot be considered to involve an inventive step when the document is taken alone
document of particular relevance; the claimed invention cannot be considered to involve an inventive step when the document is combined with one or more other such documents, such combination being obvious to a person skilled in the art
document member of the same patent family


Patent document cited in search report Publication date
Patent family member(s) Publication date
US 2017-0089182 A1
30 March 2017
BR 102016021906 A2
GB 2542946 A
GB 201616205 D0
NO 20161520 A1
SG 10201607879 A
US 10392907 B2
04 April 2017
05 April 2017
09 November 2016
27 March 2017
27 April 2017
27 August 2019
US 2017-0211355 A1
27 July 2017
US 9896911 B2
20 February 2018
US 2014-0060850 A1
06 March 2014
AU 2012-216663 A1
BR 102012022423 A2
CN 102979474 A
EP 2568108 A1
EP 2568108 B1
GB 2494529 B
GB 201215847 D0
GB 2494529 A
MY 158295 A
NO 20120923 A1
SG 188726 A1
US 9175540 B2
21 March 2013
19 April 2016
20 March 2013
13 March 2013
28 May 2014
13 August 2014
24 October 2012
13 March 2013
30 September 2016
07 March 2013
30 April 2013
03 November 2015
US 2012-0138159 A1
07 June 2012
AU 2011-253743 B2
AU 2011-253743 A1
BR PI1105076 A2
CN 102561985 B
CN 102561985 A
EP 2460974 B1
EP 2460974 A3
EP 2460974 A2
MY 158273 A
SG 10201402764 A
SG 182058 A1
US 9175538 B2
15 September 2016
21 June 2012
22 December 2015
12 April 2017
11 July 2012
03 October 2018
02 January 2013
06 June 2012
30 September 2016
30 October 2014
30 July 2012
03 November 2015
US 2010-0071775 A1
25 March 2010
US 8161993 B2
WO 2010-039511 A2
WO 2010-039511 A3
24 April 2012
08 April 2010
08 July 2010
Name and mailing address of the ISA/:
Korean Intellectual Property Office
189 Cheongsa-ro, Seo-gu, Daejeon Metropolitan City, 302-701
Republic of Korea
Facsimile No. +82-42-481-8578
Date of the actual completion of the international search:
23 March 2020
Date of mailing of the international search report:
23 March 2020
Authorized officer:
KIM, Sung Hoon
Telephone No. +82-42-481-8710
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