Combating lost circulation during the drilling of wells

Details Combating lost circulation during the drilling of wells Combating lost circulation during the drilling of wells

1995-03-06

1996-03-26

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

106706, 106708, 166292, 175 72, E21B 33138

Patent

active

055012779

ABSTRACT:
The present invention provides improved methods of combating lost drilling fluid circulation in wells, particularly in wells penetrating vugular and naturally fractured formations such as geothermal wells. The methods basically comprise the steps of forming a quick set cementitious composition which when drilled after setting produces cuttings compatible with the drilling fluid being used, introducing the cementitious composition into the drilling fluid thief zone in the well, allowing the composition to set into a cementitious plug in the thief zone and then continuing the drilling of the well bore through and below the cementitious plug.

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