PRESS RELEASE

To:  City Editors
Embargoed Until 7:30 a.m. 3rd March, 1997              3rd March, 1997
(Not for Distribution to or into the United
States of America, Canada, Australia or Japan)

                               HALLIBURTON COMPANY
                           RECOMMENDED CASH OFFER FOR
                          OGC INTERNATIONAL PLC ("OGC")

                      OFFER UNCONDITIONAL AS TO ACCEPTANCES

Halliburton  Holdings  Limited  ("Halliburton"),  a  wholly-owned  subsidiary of
Halliburton  Company,  announces that its recommended  cash offer to acquire the
whole of the existing issued share capital of OGC (the "Offer") is unconditional
as to acceptances and will remain open until further notice.

By 3:00 p.m. on Friday,  28th February,  1997 valid acceptances of the Offer had
been received in respect of 56,744,730  OGC shares  (representing  approximately
93.3 percent of the existing issued share capital of OGC).

Prior to the  announcement of the Offer,  Halliburton  had received  irrevocable
undertakings   to  accept  the  Offer  in  respect  of  24,574,760   OGC  shares
(representing approximately 40.4 percent of the existing issued share capital of
OGC). All of these shares have been validly assented to the Offer.

Prior to the Offer period commencing on 23rd December,  1996 neither Halliburton
Company nor  Halliburton  nor any persons  acting in concert with them owned any
OGC shares or rights over OGC shares nor have they acquired or agreed to acquire
(other  than  pursuant  to the Offer)  any OGC shares or rights  over OGC shares
during the Offer period.

Press enquiries:

Halliburton Company            Guy Marcus                    001 214 978 2691

Baring Brothers
International Limited          Nicholas Backhouse            0171 767 1000

Persons receiving this press  announcement  should note that, in connection with
the Offer described above, Baring Brothers  International  Limited is acting for
Halliburton  Company and  Halliburton  Holdings  and no-one else and will not be
responsible to anyone other than  Halliburton  Company and Halliburton  Holdings
for providing the protections  afforded to its customers or for providing advice
in relation to the Offer. Baring Brothers  International Limited is regulated by
The Securities and Futures Authority Limited.

                               Page 5 of 5 Pages
                       The Exhibit Index Appears on Page 4