TR Oil Services

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TR Oil Services Ltd. ("TROS") is a now-defunct company which traded in oilfield production chemicals.

TROS was established in 1972 by Simon Engineering in Manchester, UK. In 1983, German chemical giant Hoechst AG acquired a 50% share of the company. In 1993, Hoechst acquires the remaining shares and TROS became a 100% Hoechst subsidiary.

Following the divestment of the Hoechst speciality chemicals business, TROS became a subsidiary of Clariant in 1997.

In 2003, the TROS business was integrated into the parent company, Clariant, under the name "Clariant Oil Services", and ceased to trade as a separate company.

Former TROS subsidiaries, also integrated with Clariant, included:

Norway: TR Oil Services AS (formely Scandinavian Oilfield Chemicals AS)

USA: TR Oil Services Inc.

Venezuela: TR Oil Services SA

Singapore: TR Oil Services (Far East) Pte. Ltd. (formerly South East Asia TR Oil Services)

Malaysia: Shapadu-TROS Sdn. Bhd. (now Clariant Oil Services Malaysia Sdn. Bhd.) Joint Venture.

Saudi Arabia: Arabian TR Oil Services Company Ltd. (now Clariant Ali Al Abdulla Al Tamimi Company Ltd.) - Joint Venture.