Method and composition for sweep of cuttings beds in a...

Details Method and composition for sweep of cuttings beds in a... Method and composition for sweep of cuttings beds in a...

E - Fixed Constructions

21

B

E21B 37/00 (2006.01) C09K 8/05 (2006.01) C09K 8/52 (2006.01)

Patent

CA 2347957

A sweep material is disclosed comprising barium sulfate that has been ground and sieved, preferably in the range of about -95% 30 mesh to about +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.

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