Particulate bridging agents used for forming and breaking filtercakes on wellbores
AssigneeM-I L.L.C.
InventorsRobert L. Horton, Bethicia B. Prasek
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Abstract
A method of preventing fluid loss to a wellbore that includes pumping a wellbore fluid into the wellbore through a subterranean formation, the wellbore fluid comprising: a base fluid; and a plurality of particulate bridging agents comprising a solid breaking agent encapsulated by one of an inorganic solid material and an oil-soluble resin; and allowing some filtration of the wellbore fluid into the subterranean formation to produce a filter cake comprising the particulate bridging agents is disclosed.
Claims22
A method of preventing fluid loss to a wellbore, comprising:
- pumping a wellbore fluid into the wellbore through a subterranean formation, the wellbore fluid comprising:
- a base fluid;
- and
- a plurality of particulate bridging agents comprising a solid breaking agent encapsulated by one of an inorganic solid material and an oil-soluble resin;
- and
- allowing some filtration of the wellbore fluid into the subterranean formation to produce a filter cake comprising the particulate bridging agents.
A method of breaking a filtercake, comprising:
- releasing a solid breaking agent encapsulated by one of a solid inorganic material and an oil-soluble resin from the encapsulation, wherein the encapsulated solid breaking agent is incorporated in the filtercake;
- and
- allowing the released breaking agent to degrade at least a portion of the filtercake.
A wellbore fluid comprising:
- a base fluid;
- and
- particulate bridging agents comprising a solid breaking agent encapsulated by one of a solid inorganic material and an oil-soluble resin.
A particulate bridging agent used for forming and breaking a filtercake on a wellbore wall, comprising:
- a solid breaking agent encapsulated by one of a solid inorganic material and an oil-soluble resin.
A method of forming a particle comprising:
- providing a solid breaking agent;
- and
- encapsulating the solid breaking agent with one of a solid inorganic material and an oil-soluble resin.
Dependencies are inferred from the claim text.