Upon completion of the Baroid merger, Dresser became the third-largest oil-services company in the world.

The oil-services company has been experimenting with an I.B.M. parallel computer for six months to help it get faster, more refined, three-dimensional pictures of oil-bearing geologic formations.

The men in the pumper truck were employees of Dowell-Schlumberger, a Paris-based oil-services company.

He acquired some of them - for example, NL Industries, a chemical and oil-services company.

The tool division would merge with Baker International in 1987 to form Baker Hughes, the world's third-largest oil-services company.

They were escorting an S.U.V. with two civilians who work for KBR, an American oil-services company.

Halliburton, the nation's largest military- and oil-services company, sought on Tuesday to portray the Army's decision as an opportunity for the company to gain more profit from work it chooses to bid for again.

Last month, the three biggest cutbacks were announced by the Halliburton Company and Schlumberger Ltd., two oil-services companies, and the Bell Atlantic Corporation.