Lost circulation materials (LCM's) effective to maintain emulsion stability of drilling fluids
OwnerMichael Jarrettinventor
Life of this patent
Estimating the term…
Abstract
Lost circulation materials and methods for maintaining emulsion stability in emulsion type drilling, drill-in, and completion fluids, particularly invert emulsions.
Claims132
A method for maintaining electrical stability in an emulsion type drilling, drill-in, or completion fluid comprising lost circulation material (LCM), said method comprising:
- providing an initial fluid selected from the group consisting of an emulsion-type drilling, drill-in, or completion fluid, said initial fluid having effective rheology and fluid loss control properties;
- using a fibrous LCM in said initial fluid, said fibrous LCM consisting essentially of a quantity of high lignin lost circulation material (HLLCM), said fibrous HLLCM being effective to produce a treated fluid having effective rheology and fluid loss control properties;
- wherein said initial fluid exhibits a first electrical stability value and said treated fluid exhibits a second electrical stability value that is a maximum of 20% less than said first electrical stability value.
A method for maintaining electrical stability in an emulsion type drilling, drill-in, or completion fluid comprising lost circulation material (LCM), said method comprising:
- providing an initial fluid selected from the group consisting of an invert emulsion drilling, drill-in, or completion fluid, said initial fluid having effective rheology and fluid loss control properties;
- using a fibrous LCM in said initial fluid, said fibrous LCM consisting essentially of a quantity of high lignin lost circulation material (HLLCM), said fibrous HLLCM being effective to produce a treated fluid having effective rheology and fluid loss control properties;
- wherein said initial fluid exhibits a first electrical stability value and said treated fluid exhibits a second electrical stability value that is a maximum of 20% less than said first electrical stability value.
A method for maintaining electrical stability in a drilling, drill-in, or completion fluid, said method comprising:
- providing an initial fluid selected from the group consisting of an emulsion type drilling, drill-in, or completion fluid having effective rheology and fluid loss control properties;
- and
- using as LCM in said initial fluid a fibrous HLLCM having a water retention value of about 1 or less, said HLLCM being effective to produce a treated fluid having effective rheology and fluid loss control properties.
A method for maintaining electrical stability in a drilling, drill-in, or completion fluid, said method comprising:
- providing an initial fluid selected from the group consisting of invert emulsion drilling, drill-in, or completion fluids having effective rheology and fluid loss control properties;
- and
- using as LCM in said initial fluid a fibrous HLLCM having a water retention value of about 1 or less, said fibrous HLLCM being effective to produce a treated fluid having effective rheology and fluid loss control properties.
A method for maintaining electrical stability in a drilling, drill-in, or completion fluid, said method comprising:
- providing an initial fluid selected from the group consisting of a emulsion type drilling, drill-in, or completion fluid, said initial fluid having effective rheology and fluid loss control properties;
- and
- using an LCM in said initial fluid, said LCM consisting essentially of grape pumice effective to produce a treated fluid having effective rheology and fluid loss control properties.
A method for maintaining electrical stability in a drilling, drill-in, or completion fluid, said method comprising:
- providing an initial fluid selected from the group consisting of an invert emulsion drilling, drill-in, or completion fluid, said initial fluid having effective rheology and fluid loss control properties;
- and
- using an LCM in said initial fluid, said LCM consisting essentially of grape pumice effective to produce a treated fluid having effective rheology and fluid loss control properties.
A treated emulsion type fluid selected from the group consisting of a drilling, drill-in, or completion fluid, said emulsion type drilling fluid having effective rheology and fluid loss control properties and comprising a lost circulation material consisting essentially of an HLLCM, said wherein said emulsion type fluid exhibits a first electrical stability value and said treated emulsion type fluid exhibits a second electrical stability value that is a maximum of 20% less than said first electrical stability value.
A treated invert emulsion fluid selected from the group consisting of a drilling, drill-in, or completion fluid, said invert emulsion fluid having effective rheology and fluid loss control properties and comprising a lost circulation material consisting essentially of an HLLCM, said wherein said invert emulsion fluid exhibits a first electrical stability value and said treated emulsion type fluid exhibits a second electrical stability value that is a maximum of 20% less than said first electrical stability value.
A treated emulsion type fluid selected from the group consisting of a drilling, drill-in, or completion fluid, said fluid having effective rheology and fluid loss control properties and consisting essentially of an LCM having a water retention value of about 1 or less.
A treated invert emulsion fluid selected from the group consisting of a drilling, drill-in, or completion fluid, said fluid having effective rheology and fluid loss control properties and consisting essentially of an LCM having a water retention value of about 1 or less.
A treated emulsion type fluid selected from the group consisting of a drilling, drill-in, or completion fluid, said fluid having effective rheology and fluid loss control properties and comprising a fibrous LCM, said fibrous LCM consisting essentially of materials selected from the group consisting of grape pumice, bulrush plants, and lignin byproducts from the processing of plant material into paper.
A treated emulsion type fluid selected from the group consisting of a drilling, drill-in, or completion fluid, said fluid having effective rheology and fluid loss control properties and comprising a fibrous LCM consisting essentially of grape pumice.
A treated invert emulsion fluid selected from the group consisting of a drilling, drill-in, or completion fluid, said fluid having effective rheology and fluid loss control properties and comprising a fibrous LCM consisting essentially of grape pumice.
A spotting pill comprising from about 1 to about 100 ppb of an HLLCM and a carrier liquid, wherein a given emulsion type fluid exhibits a first electrical stability value absent said spotting pill and said given emulsion type fluid comprising said spotting pill exhibits a second electrical stability value that is a maximum of 20% less than said first electrical stability value.
A spotting pill comprising from about 1 to about 100 ppb of an HLLCM and a carrier liquid, wherein a given invert emulsion fluid exhibits a first electrical stability value absent said spotting pill and said given invert emulsion fluid comprising said spotting pill exhibits a second electrical stability value that is a maximum of 20% less than said first electrical stability value.
A spotting pill comprising from about 1 to about 100 ppb of an HLLCM and a carrier liquid, wherein said HLLCM has a water retention value of about 1 or less.
A spotting pill comprising from about 1 to about 100 ppb of an HLLCM and a carrier liquid, wherein said HLLCM consists essentially of materials selected from the group consisting of grape pumice, bulrush plants, and lignin byproducts from the processing of plant material into paper.
A spotting pill comprising from about 1 to about 100 ppb grape pumice and a carrier liquid.
A spotting pill comprising from about 1 to about 100 ppb of an HLLCM and a carrier liquid comprising tripropylene glycol bottoms.
A spotting pill comprising from about 1 to about 100 ppb grape pumice and a carrier liquid comprising tripropylene glycol bottoms.
Dependencies are inferred from the claim text.