Loss Circulation Material Composition Having Alkaline Nanoparticle Based Dispersion and Water Insoluble Hydrolysable Polyester
AssigneeSaudi Arabian Oil Company
InventorsVikrant Wagle, Rajendra Kalgaonkar, Abdullah Al-Yami, Zainab Alsaihati
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Abstract
A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and a polyester activator. The alkaline nanosilica dispersion and the polyester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.
Claims21
A method to control lost circulation in a lost circulation zone in a wellbore, comprising:
- introducing a lost circulation material (LCM) into the wellbore such that the LCM contacts the lost circulation zone and reduces a rate of lost circulation of a drilling fluid into the lost circulation zone as compared to a period before introducing the LCM, wherein the LCM comprises an alkaline nanosilica dispersion and a water insoluble polyester, wherein the weight ratio of the alkaline nanosilica dispersion to the polyester activator is in the range of 50:1 to 80:1.
(canceled)
A lost circulation material (LCM) composition, comprising:
- an alkaline nanosilica dispersion;
- and
- a water insoluble polyester, the water insoluble polyester selected to form a gelled solid with the alkaline nanosilica dispersion after a period.
A solid gelled material useful for mitigating lost circulation, where the solid gelled material forms by introducing an alkaline nanosilica dispersion and a water insoluble polyester to a lost circulation zone, the nanosilica dispersion comprising amorphous silicon dioxide and water, such that the nanosilica dispersion and the water insoluble polyester contact the lost circulation zone for a period such that the solid gelled material forms.
Dependencies are inferred from the claim text.