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INTRODUCTION

DEFINITIONS

Capitalised terms which are not otherwise defined herein are used as defined in the Schedules to this opinion letter.

In this opinion letter:

SCOPE OF INQUIRY

For the purpose of rendering this opinion letter, we have only examined and relied upon electronically transmitted copies of (i) the executed Offering Documents, (ii) the executed Opinion Documents and (iii) the documents listed in paragraph 3 (Organisational Documents) of Schedule 2 (Reviewed Documents).

We have not reviewed any documents incorporated by reference or referred to in the Opinion Documents (unless included as an Opinion Document) and therefore our opinions do not extend to such documents.

NATURE OF OPINION

We only express an opinion on matters of Luxembourg law in force on the date of this opinion letter, excluding unpublished case law. We undertake no obligation to update it or to advise of any changes in such laws or case law, their construction or application.

Except as expressly stated in this opinion letter, we do not express an opinion on public international law or on the rules of, or promulgated under, any treaty or by any treaty organisation or European law (save for rules implemented into Luxembourg law or directly applicable in Luxembourg), on the European Market Infrastructure Regulation (EU) 648/2012 and any laws and regulations relating thereto, any Luxembourg laws implementing the Directive 2011/61/EU of the European Parliament and of the Council on Alternative Investment Fund Managers, tax, transfer pricing, regulatory, competition, data protection, accounting or administrative law, sanction laws and regulations or as to the consequences thereof.

Our opinion is strictly limited to the matters stated herein. We do not express any opinion on matters of fact, on the commercial and other non-legal aspects of the transactions contemplated by the Opinion Documents and on any representations, warranties or other information included in the Opinion Documents and any other document examined in connection with this opinion letter, except as expressly stated in this opinion letter.

We express no opinion in respect of the validity and enforceability of the Opinion Documents.

We express no opinion with respect to the Offering Documents nor as regards the accuracy, truth or completeness of the information contained therein except as expressly stated in this opinion letter.

In this opinion letter Luxembourg legal concepts are sometimes expressed in English terms and not in their original French or German terms. The concepts concerned may not be identical to the concepts described by the same English terms as they exist under the laws of other jurisdictions. For the purpose of tax law, a term may have a different meaning than for the purpose of other areas of Luxembourg law.

This opinion letter may only be relied upon under the express condition that any issue of interpretation or liability arising hereunder will be governed by Luxembourg law and be brought exclusively before the Courts of the District of Luxembourg-City.

This opinion letter is issued by Loyens & Loeff Luxembourg SARL and may only be relied upon under the express condition that any liability of Loyens & Loeff Luxembourg SARL is limited to the amount paid out under its professional liability insurance polices. Only Loyens & Loeff Luxembourg SARL can be held liable in connection with this opinion letter.

OPINIONS

Corporate status

Due authorisation

Due execution

ADDRESSEES

This opinion letter is addressed to you and may only be relied upon by you in connection with the transactions to which the Opinion Documents relate and may not be disclosed to and relied upon by any other person without our prior written consent.

We hereby consent to the filing of this opinion as Exhibit 5 to the Current Report of Form 8-K. In giving this consent, we do not admit that we are in the category of persons whose consent is required under Section 7 of the Act or the rules and regulations of the SEC thereunder.

Schlumberger Investment S.A.

OFFERING DOCUMENTS

the Registration Statement.

the Prospectus Supplement.

OPINION DOCUMENTS

an indenture, dated 3 December 2013 (the Base Indenture), as supplemented by a supplemental indenture, dated 26 June 2020, governed by the laws of the State of New York, entered into by and between, the Company as issuer, the Guarantor and The Bank of New York Mellon as trustee, pursuant to which the Notes will be issued (the Supplemental Indenture) (and together with the Base Indenture, the Indenture).

2 global notes representing the Notes, governed by the laws of the State of New York, each dated 26 June 2020, issued by the Company (the Global Notes).

ORGANISATIONAL DOCUMENTS

RCS Documents

an excerpt pertaining to the Company delivered by the RCS dated 26 June 2020 (the Excerpt).

a certificate of absence of a judicial decision pertaining to the Company delivered by the RCS dated 26 June 2020, with respect to the situation of the Company as at 25 June 2020 (the RCS Certificate).

Corporate Documents

the deed of incorporation of the Company, as drawn up by Maitre Martine Schaeffer, notary residing in Luxembourg, Luxembourg, dated 18 August 2011 (the Deed of Incorporation).

the consolidated text of the articles of association of the Company, as drawn up by Maitre Martine Schaeffer, notary residing in Luxembourg, Luxembourg, dated 2 September 2011 (the Articles).

Resolutions

DOCUMENTS

All Signatures are genuine, all original documents are authentic and all copies are complete and conform to the originals.

The Information contained and the statements made in the Excerpt, the RCS Certificate and the Resolutions are true, accurate and complete at the Relevant Date.

INCORPORATION, EXISTENCE, CORPORATE POWER

There were no defects in the incorporation process of the Company (not appearing on the face of the Deed of Incorporation). The Articles are in full force and effect on the Relevant Date.

The Company has its central administration (administration centrale) and has its centre of main interest (as described in the Insolvency Regulation) in Luxembourg and does not have an establishment (as described in the Insolvency Regulation) outside Luxembourg.

The Company complies with and adheres to all laws and regulations on the domiciliation of companies.

The Company (a) is not, and will not, as a result of its entry into the Opinion Documents or the performance of its obligations thereunder, be in a state of cessation of payments (cessation des paiements), or be deemed to be in such state, and has not lost, and will not, as a result of its entry into the Opinion Documents or the performance of its obligations thereunder, lose its creditworthiness (ébranlement de crédit), or be deemed to have lost such creditworthiness and no party to the Opinion Documents is aware, or may be reasonably expected to have been aware, of such circumstances, and (b) does not meet the criteria to be subject to any Insolvency Proceedings (as defined below).

The execution, entry into and performance by the Company of the Opinion Documents, and the transactions in connection therewith (a) are in its corporate interest, (b) with the intent of pursuing profit (but lucratn) and (c) serving the corporate object of the Company.

AUTHORISATIONS

The Resolutions (a) correctly reflect the resolutions adopted by the members of the board of directors of the Company, (b) have been validly adopted, With due observance of the Articles and any applicable by-laws and (c) are in full force and effect.

The Company is not under any contractual obligation to obtain the consent, approval, co-operation, permission or otherwise of any third party or person in connection with the execution of, entry into, and performance of its obligations under, the Opinion Documents.

EXECUTION

The Opinion Documents have in fact been signed on behalf of the Company by the persons authorised to that effect.

All individuals having signed the Reviewed Documents and the Opinion Documents have legal capacity and power under all relevant laws and regulations to do so.

REGULATORY

ISSUE OF NOTES

The Notes will only be offered pursuant to an exemption from the requirement to draw up a prospectus in accordance with Regulation (EU) 2017/1129 and the relevant implementing measures in any Member States (the Prospectus Regulation) or in circumstances which do not constitute an offer of securities to the public within the meaning of the Prospectus Regulation.

The Notes will not be listed on any market.

The Notes are issued in registered form only.

The Global Notes will be executed, authenticated and delivered, and the Notes will be subscribed, paid for, issued and registered in accordance with the terms of the Opinion Documents.

MISCELLANEOUS

Each transaction entered into pursuant to, or in connection with, the Opinion Documents (both together and individually) and all payments and transfers made by, on behalf of, or in favour of, the Company are made at arm’s length and in accordance with market practice.

Each party to the Opinion Documents entered into and will perform its obligations under the Opinion Documents in good faith, for the purpose of carrying out its business and without any intention to defraud or deprive of any legal benefit any other party (including third party creditors) or to circumvent any mandatory law, regulation of any jurisdiction or contractual arrangements.

There are no provisions in the laws of any jurisdiction outside Luxembourg or in the documents mentioned in the Opinion Documents, which would adversely affect, or otherwise have any negative impact on this opinion letter.

INSOLVENCY

ACCURACY OF INFORMATION

Corporate documents of, and court orders affecting, the Company may not be available at the RCS forthwith upon their execution and filing and there may be a delay in the filing and publication of the documents or notices related thereto. We express no opinion as to the consequences of any failure by the Company to comply with its filing, notification, reporting and publication obligations.

Documents relating to a Luxembourg company the publication of which is required by law will only be valid towards third parties from the day of their publication with the Electronic Register of Companies and Associations (Recueil Electronique des Sociétés et Associations), unless the company proves that the relevant third parties had prior knowledge thereof. Third parties may however rely upon such documents which have not yet been published. For 15 days following their publication, such documents will not be valid towards third parties who prove the impossibility for them to have knowledge thereof.

The Articles. the Excerpt and the RCS Certificate do not constitute conclusive evidence whether or not a winding-up, administration petition or order has been presented or made, a receiver has been appointed, an arrangement with creditors has been proposed or approved or any other Insolvency Proceedings have commenced.

INCORPORATION, EXISTENCE AND CORPORATE POWER

POWERS OF ATTORNEY

MISCELLANEOUS

We express no opinion on general defences under Luxembourg law, such as duress, deceit (dol) or mistake (erreur).

The registration of the Opinion Documents (and/or any documents in connection therewith) with the Registration, Estates and VAT Department (Administration de I’enregistrement, des domaines et de la TVA) in Luxembourg is required in case the Opinion Documents (and/or any documents in connection therewith) are (i) enclosed to a deed which is compulsorily registrable (acte obligatoirement enregistrable) or (ii) deposited with the official records of a notary (déposé au rang des minutes d’un notaire). Even if registration is not required by law, the Opinion Documents (and/or any documents in connection therewith) can also be produced for registration (présenté à I’enregistrement). In case of registration, registration duties will apply in the form of a fixed amount or an ad valorem amount depending on the nature of the document. The Luxembourg courts or the official Luxembourg authority may require that the Opinion Documents (and any documents in connection therewith) are translated into French, German or Luxembourgish.