Title: Invention concerns a drilling fluid with weight material for drilling of wellsin subterranean formations
Application Number: 85104368 Application Date: 1985.06.08
Publication Number: 1001451 Publication Date: 1986.07.09
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C09K7/00
Applicant(s) Name: OTTO Farstad (NO) P.O.Box 26, 6401 Molde, Norway Address:
Inventor(s) Name: OTTO Farstad
Attorney & Agent: TAO LINGAI
Abstract:
    Drilling fluid for drilling of wells is subterranean formations where the weight material includes particles of one or more metals and/or metal alloys, including iron and steel. The particles are preferably formed as pearls (pellets) or are ball-shaped and can be made of stainless steel. The weight material can have a small part of particles made of zinc for cathodic protection of pumps and pipe installations which the drilling fluid is transported through.
Time: 3