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1. (WO2017137788) DELAYED-EXPANSION CEMENT AND CEMENTING OPERATIONS



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INTERNATIONAL SEARCH REPORT (ISR)
Part 1:  1  2  3  4  5  6          Part 2:  A  B  C  D  E 
International application No. Applicant's or agent's file reference
PCT/IB2016/000261 IS15.0962-WO-PCT
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
11 February 2016
Applicant
SERVICES PETROLIERS SCHLUMBERGER
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)).
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)).
c.
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
This International Searching Authority found multiple inventions in this international application, as follows:
1. claims: 1-12
A delayed-expansion cement mixture comprising particles of hydraulic cement; and a finely-divided, hydratable expanding agent having hydrophobically modified surfaces comprising a hydrophobic film (claim 1) and a method to delay expansion of hydraulic cement, comprising treating particles of a hydratable expanding agent with a hydrophobic film precursor compound to form a finely-divided hydratable expanding agent having hydrophobically modified surfaces; combining the treated expanding agent with water and particles of hydraulic cement to form a settable cement slurry comprising the cement mixture according to claim 1 hardening the slurry to a set cement; and expanding the set cement (claim 12). "Invention I" solving the problem of providing ways to improve the preparation, handling and design of hydraulic cements with hydratable expanding agents.
2. claims: 13-18
A method to cement a subterranean well having a borehole, comprising: (i) mixing particles of hydraulic cement with a finely-divided hydratable expanding agent having hydrophobically modified surfaces to form the cement mixture according to claim 1; (ii) placing the cement mixture in a downhole region of the well; (iii) hardening the cement mixture to form a set cement; and (iv) hydrating the expanding agent to expand the set cement (claim 13). "Invention II" solves the problem for the oil and gas industry by providing ways to better and more controllably delay hydration of the expanding agents, and to improve the bonding between set cement and the casing.
1.
As all required additional search fees were timely paid by the applicant, this international search report covers all searchable claims.
2.
As all searchable claims could be searched without effort justifying additional fees, this Authority did not invite payment of additional fees.
3.
As only some of the required additional search fees were timely paid by the applicant, this international search report covers only those claims for which fees were paid, specifically claims Nos.:
4.
No required additional search fees were timely paid by the applicant. Consequently, this international search report is restricted to the invention first mentioned in the claims; it is covered by claims Nos.:
Remark on Protest
The additional search fees were accompanied by the applicant’s protest and, where applicable, the payment of a protest fee.
The additional search fees were accompanied by the applicant’s protest but the applicable protest fee was not paid within the time limit specified in the invitation.
No protest accompanied the payment of additional search fees.
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
a.
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.
b.
none of the figures is to be published with the abstract.

A. CLASSIFICATION OF SUBJECT MATTER

     C04B 28/02 (2006.01)i; C04B 20/10 (2006.01)i; C09K 8/467 (2006.01)i; C09K 8/493 (2006.01)i
According to International Patent Classification (IPC) or to both national classification and IPC

B. FIELDS SEARCHED

Minimum documentation searched (classification system followed by classification symbols):
     C09K; C04B
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

C. DOCUMENTS CONSIDERED TO BE RELEVANT

Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
(1)
X
DE 3704783 A1 (HOERLING LUDWIG CHEM [DE]) 25 August 1988 (1988-08-25)
1-12
column 1, line 64 - column 2, line 21; claims 1-7
(2)
X
CHEMICAL ABSTRACTS, CHEMICAL ABSTRACTS SERVICE (C A S), US,25 March 1991 (1991-03-25),
XP000193363
1-4,12
abstract
(3)
X
US 5650004 A (YON MICHAEL D [US]) 22 July 1997 (1997-07-22)
1-4,10,12
column 2, lines 21-29
column 2, lines 47-50
column 2, line 62 - column 3, line 63
column 4, lines 28-35
espec. claim 15;claims 1,11-15
(4)
DATABASE WPI Thomson Scientific, London, GB; Vol. 1983, No. 16, AN 1983-37836K0
XP002762277
X
& JP S5841756  A  (MATSUSHITA ELECTRIC WORKS LTD) 11 March 1983 (1983-03-11)
1,3,4,12
abstract
(5)
DATABASE WPI Thomson Scientific, London, GB; Vol. 2009, No. 77, AN 2009-Q996580
XP002762278
X
& JP 2009263164  A  (DENKI KAGAKU KOGYO KK) 12 November 2009 (2009-11-12)
1,3,4,12
abstract
(6)
DATABASE WPI Thomson Scientific, London, GB; Vol. 2013, No. 10, AN 2012-K036910
XP002764519
X
& RU 2452758  C1  (LUKOIL-ENGINEERING CO LTD) 10 June 2012 (2012-06-10)
13-18
abstract
(7)
X
US 2005167107 A1 (RODDY CRAIG W [US] ET AL) 04 August 2005 (2005-08-04)
13-18
paragraph [0011] - paragraph [0023]; claims 1-78
(8)
A
WO 2015195596 A1 (SCHLUMBERGER SERVICES PETROL [FR]; SCHLUMBERGER CA LTD [CA]; SCHLUMBER) 23 December 2015 (2015-12-23)
13-18
paragraph [0007] - paragraph [0014]; claims 1-13; examples 1-5
(9)
A
EP 2113546 A1 (SCHLUMBERGER HOLDINGS [CA]; PRAD RES & DEV LTD [AN]; SCHLUMBERGER SERV) 04 November 2009 (2009-11-04)
13-18
paragraph [0010] - paragraph [0013]
paragraph [0019] - paragraph [0022]
paragraph [0030]
(10)
A
WO 2008034461 A1 (SCHLUMBERGER SERVICES PETROL [FR]; SCHLUMBERGER TECHNOLOGY BV [NL]; SC) 27 March 2008 (2008-03-27)
13-18
paragraph [0011] - paragraph [0031]
*
Special categories of cited documents:
"A"
document defining the general state of the art which is not considered to be of particular relevance
"E"
earlier application or patent but published on or after the international filing date
"L"
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)
"O"
document referring to an oral disclosure, use, exhibition or other means
"P"
document published prior to the international filing date but later than the priority date claimed
"T"
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
"X"
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
"Y"
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

D. INFORMATION ON PATENT FAMILY MEMBERS

Patent document cited in search report Publication date
(day/month/year)
Patent family member(s) Publication date
(day/month/year)
DE 3704783 A1
25 August 1988
NONE
US 5650004 A
22 July 1997
NONE
JP S5841756 A
11 March 1983
NONE
JP 2009263164 A
12 November 2009
JP 5113610 B2
JP 2009263164 A
09 January 2013
12 November 2009
RU 2452758 C1
10 June 2012
-----------------------------------------------------------------------
US 2005167107 A1
04 August 2005
AR 049616 A1
CA 2553897 A1
EP 1706582 A1
US 2005167107 A1
WO 2005073504 A1
23 August 2006
11 August 2005
04 October 2006
04 August 2005
11 August 2005
WO 2015195596 A1
23 December 2015
NONE
EP 2113546 A1
04 November 2009
CA 2721703 A1
EP 2113546 A1
EP 2276906 A2
US 2011098202 A1
US 2015252245 A1
WO 2009133438 A2
05 November 2009
04 November 2009
26 January 2011
28 April 2011
10 September 2015
05 November 2009
WO 2008034461 A1
27 March 2008
AR 063220 A1
CA 2663721 A1
CN 101541915 A
EG 26864 A
US 2010081733 A1
US 2012312535 A1
WO 2008034461 A1
14 January 2009
27 March 2008
23 September 2009
09 November 2014
01 April 2010
13 December 2012
27 March 2008
Name and mailing address of the ISA/:
European Patent Office
P.B. 5818, Patentlaan 2, 2280 HV Rijswijk,
Netherlands
Telephone No. (+31-70)340-2040
Facsimile No. (+31-70)340-3016
Date of the actual completion of the international search:
23 November 2016
Date of mailing of the international search report:
01 December 2016
Authorized officer:
Büscher, Olaf
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