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US 2003/0195120 A1Published application
Acid soluble, high fluid loss pill for lost circulation
AssigneeBaker Hughes Incorporated
InventorsWilliam S. Halliday, Dennis K. Clapper, Michael Jarrett, Michelle Carr
Life of this patent
Estimating the term…
Abstract
High fluid loss acid soluble lost circulation material and spotting pill comprising the lost circulation material. The spotting pill preferably is weighted to a density substantially the same as the drilling fluid used to treat the formation.
Claims113
A high fluid loss spotting pill comprising:
- a carrier fluid;
- an LCM consisting essentially of an amount and form of acid soluble mineral particulate;
- said amount and said form being adapted to form a substantially impermeable, acid soluble filtercake upon injection of said composition with said carrier fluid into said wellbore and defluidization.
A high fluid loss spotting pill comprising:
- a carrier fluid;
- a first quantity of weighting agent adapted to produce a density substantially the same as the density of a drilling fluid used to drill a formation being treated;
- a second quantity of suspending agent effective to suspend said weighting agent in said carrier fluid;
- an LCM consisting essentially of:
- a third quantity of acid soluble mineral fiber;
- and;
- an amount of acid soluble mineral particulate;
- said third quantity, said amount, and said form being adapted to form a substantially impermeable, acid soluble filtercake upon injection of said composition with an effective carrier fluid into said wellbore and defluidization.
5 more elements
A high fluid loss spotting pill comprising:
- a carrier fluid;
- a first quantity of weighting agent adapted to produce a density substantially the same as the density of a drilling fluid used to drill a formation being treated;
- a second quantity of suspending agent effective to suspend said weighting agent in said carrier fluid;
- an amount of LCM consisting essentially of calcium carbonate particulate;
- said quantity, said amount, and said form being adapted to form a substantially impermeable, acid soluble filtercake upon injection of said composition with an effective carrier fluid into said wellbore and defluidization.
2 more elements
A high fluid loss spotting pill comprising:
- a carrier fluid;
- a first quantity of weighting agent adapted to produce a density substantially the same as the density of a drilling fluid used to drill a formation being treated;
- a second quantity of suspending agent effective to suspend said weighting agent in said carrier fluid;
- an LCM consisting essentially of:
- a third quantity of acid soluble mineral fiber;
- and;
- an amount of calcium carbonate particulate;
- said quantity, said amount, and said form being adapted to form a substantially impermeable, acid soluble filtercake upon injection of said composition with an effective carrier fluid into said wellbore and defluidization.
5 more elements
A high fluid loss spotting pill comprising:
- a carrier fluid;
- an LCM consisting essentially of an amount and form of acid soluble mineral particulate;
- said amount and said form being adapted to form a substantially impermeable, acid soluble filtercake upon injection of said composition with said carrier fluid into said wellbore and defluidization;
- a first quantity of weighting agent;
- and
- a second quantity of suspending agent effective to suspend said weighting agent, said suspending agent being selected from the group consisting of attapulgite, quaternized attapulgite, and a combination thereof.
3 more elements
Dependencies are inferred from the claim text.