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International application No. Applicant's or agent's file reference
PCT/EP2020/051616 XP11776WOSF
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
23 January 2020 28 January 2019
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:
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.

An extrudable ball seat (36) is configured to be secured along a well tubing (34). The extrudable ball seat (36) comprises a larger diameter section (42) and a smaller diameter (44) section connected by a conical section (46). The conical section (46) has an internal seating surface (48) for receiving a corresponding element, e.g. a ball (52), in sealing engagement. The extrudable ball seat (36) facilitates controlled extrusion of the element following a pressure actuation procedure by providing the smaller diameter section (44) with sufficient ductility to enable extrusion of the element under an increased predetermined pressure. Additionally, the extrudable ball seat comprises at least one notch (56), e.g. a plurality of grooves (58), positioned to initiate crack propagation and thus extrusion of larger elements.

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 34/14 (2006.01)i; E21B 23/04 (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:
Electronic data base consulted during the international search (name of data base and, where practicable, search terms used):
EPO-Internal, WPI Data


Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
WO 9848143 A1 (ALLAMON JERRY P [US]) 29 October 1998 (1998-10-29)
page 17, lines 25-26 and 26-30; page 18, lines 11-30 and page 19, lines 1-11 and 17-18; page 20, lines 17-30 and page 21, lines 1-13; Abstract;figures 1, 12-17
US 2017122441 A1 (ADAM MARK KENDALL [US]) 04 May 2017 (2017-05-04)
paragraphs [0016], [0019]; claims 1, 2; figures 2-6
US 2013081817 A1 (NORRID WILLIAM MARK [US] ET AL) 04 April 2013 (2013-04-04)
paragraphs [0049] - [0051]; figures 2C, 2D, 3A
US 2014060813 A1 (NAEDLER MARK H [US] ET AL) 06 March 2014 (2014-03-06)
the whole document
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
WO 9848143 A1
29 October 1998
AU 752337 B2
CA 2288103 A1
EP 0991847 A1
US 5960881 A
WO 9848143 A1
19 September 2002
29 October 1998
12 April 2000
05 October 1999
29 October 1998
US 2017122441 A1
04 May 2017
US 2013081817 A1
04 April 2013
AR 088196 A1
CA 2847850 A1
CA 2974565 A1
CA 2997480 A1
DK 2761126 T3
EP 2761126 A1
MX 344519 B
US 2013081817 A1
WO 2013048696 A1
14 May 2014
04 April 2013
04 April 2013
04 April 2013
29 July 2019
06 August 2014
19 December 2016
04 April 2013
04 April 2013
US 2014060813 A1
06 March 2014
AU 2013313197 A1
CA 2883322 A1
EP 2893127 A1
US 2014060813 A1
US 2017122061 A1
WO 2014039272 A1
05 March 2015
13 March 2014
15 July 2015
06 March 2014
04 May 2017
13 March 2014
Name and mailing address of the ISA/:
European Patent Office
P.B. 5818, Patentlaan 2, 2280 HV Rijswijk,
Telephone No. (+31-70)340-2040
Facsimile No. (+31-70)340-3016
Date of the actual completion of the international search:
11 March 2020
Date of mailing of the international search report:
23 March 2020
Authorized officer:
Patrascu, Bogdan
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