Halliburton Energy Services, Inc.

Gary C West

Jeff Kirsner

David L Carbajal

Don Siems

Kimberly Jo Burrows

Kenneth W Oyler

Rob Charles Valenziano

Ernest Len Grebe

Karl A Lutgring

Rob Valenziano

David Carbajal

Diesel oil-based invert emulsion drilling fluids having fragile gel properties and improved performance. Methods are also disclosed for drilling, running casing, cementing, and/or producing hydrocarbons in a subterranean formation.

Diesel oil-based invert emulsion drilling fluids and methods of drilling boreholes

An inhibitive water-based polymer mud system and method for using the system in drilling and in stabilizing wellbores is disclosed for use in water sensitive formations as an alternative to oil-based muds. The system comprises a non-ionic low molecular weight polyacrylamide in combination with a non-ionic high molecular weight polyacrylamide, preferably long chain alcohol and poly anionic cellulose.

Inhibitive water-based drilling fluid system and method for drilling sands and other water-sensitive formations

A sweep material is disclosed comprising barium sulfate that has been ground and sieved, preferably in the range of about &minus;95% 30 mesh to about &plus;95% 100 mesh. The sweep material is added to and circulated with the drilling fluid during drilling of a deviated, directional or horizontal well to remove cuttings beds accumulated on the lower side of the well. After the drill cuttings are dislodged, the drilling fluid is sieved or screened to remove the barium sulfate to avoid a change in density of the fluid. The drilling operation does not have to be stopped during the sweep or cleaning treatment.

Method and composition for sweep of cuttings beds in a deviated borehole

Growing community of inventors

Spring, TX, United States of America

Gary C West