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Water based completion and displacement fluid and method of use

Patent Number: 8105989
Publication Date: 2012-01-31
Inventors: Ravitz, Raymond D.; Luyster, Mark; Svoboda, Charles

A method of cleaning a wellbore prior to the production of oil or gas is disclosed, wherein the wellbore has been drilled with an invert emulsion drilling mud that forms an invert emulsion filter cake. The method may include the steps of circulating a breaker fluid into the wellbore, where the breaker fluid includes an aqueous fluid, a water soluble polar organic solvent, a hydrolysable ester of a carboxylic acid, and a weighting age, and where the hydrolysable ester is selected so that ...

Corrosion inhibitors for a fluid

Patent Number: 8105988
Publication Date: 2012-01-31
Inventors: Acosta, Erick J.; Clark, Jeffery Caleb

One or more methods for inhibiting corrosion in a fluid that contain a composition with a specified generic formula are disclosed. The fluid can be contained in an oil or gas pipeline or ...

Corrosion inhibitors for an aqueous medium

Patent Number: 8105987
Publication Date: 2012-01-31
Inventors: Acosta, Erick J.; Clark, Jeffery Caleb

One or more methods for inhibiting corrosion in an aqueous medium that contain a composition with a specified generic formula are disclosed. The aqueous medium can be contained in an oil or gas pipeline or ...

Aqueous particulate slurry compositions and methods of making same

Patent Number: 8105986
Publication Date: 2012-01-31
Inventor: Zhang, Kewei

A sand slurry composition and a method for making sand slurries are disclosed. The sand slurry composition is comprised of sand, an aqueous liquid and a chemical compound that renders the surface sand of hydrophobic. The method is comprised of rendering sand surface hydrophobic during or before making the slurry. This method and composition can find many applications in different industries, especially in various oil field ...

Friction loss reduction in viscoelastic surfactant fracturing fluids using low molecular weight water-soluble polymers

Patent Number: 8105985
Publication Date: 2012-01-31
Inventors: Wood, William Russell; Crews, James B.

Adding relatively low molecular weight water-soluble friction loss reduction polymers to an aqueous fluid gelled with a viscoelastic surfactant (VES) increases the critical generalized Reynold's number at which the Fanning friction factor increases and friction pressure starts to increase rapidly. The water-soluble polymeric friction loss reduction additives lower surface pumping pressure in VES-gelled fracturing fluids for a given pump rate, thus lowering hydraulic horsepower (HHP) ...

Reduced abrasion drilling fluid

Patent Number: 8105984
Publication Date: 2012-01-31
Inventors: Mas, Manuel; Quercia, George; Quiroga, Freddy; Rengifo, Richard

A reduced abrasion drilling fluid system and method of drilling a borehole by circulating the reduced abrasion drilling fluid through the borehole is disclosed. The reduced abrasion drilling fluid comprises a drilling fluid, a first additive and a weighting agent, wherein the weighting agent has a particle size of at least 90% by volume less than 50 ...

Unsaturated fatty acids and mineral oils as internal breakers for VES-gelled fluids

Patent Number: 8101557
Publication Date: 2012-01-24
Inventors: Huang, Tianping; Crews, James B.

Fluids viscosified with viscoelastic surfactants (VESs) may have their viscosities reduced (gels broken) by the direct or indirect action of a synergistic internal breaker composition that contains at least one first internal breaker that may be a mineral oil and a second breaker that may be an unsaturated fatty acid. The internal breakers may initially be dispersed oil droplets in an internal, discontinuous phase of the fluid. This combination of different types of internal breakers break ...

Treatment fluids for reduction of water blocks, oil blocks, and/or gas condensates and associated methods

Patent Number: 8101556
Publication Date: 2012-01-24
Inventors: Ghosh, Anindya; Norman, Lewis R.; Hall, Bobby E.; Saini, Rajesh K.

The present invention provides treatment fluids useful for subterranean operations, and more particularly, in at least one aspect, a treatment fluid that comprises a carrier fluid and a cationic surfactant comprising a cationic head group, a polar group attached to the head group, and a hydrophobic group that is either a saturated or unsaturated, branched or straight chain alkyl, and comprises about 6 carbons to about 22 carbons. The treatment fluids of the present invention are at least ...

Spotting fluids containing syrups

Patent Number: 8101555
Publication Date: 2012-01-24
Inventors: DeLaRosa, Dan M.; Rayborn, Sr., Jerry

A spotting fluid is provided and the spotting fluid consists essentially of: syrup, syrup solids and a liquid medium, said syrup and syrup solids are derived from a group consisting essentially of agave syrup, barley syrup, sugar syrup, beets syrup, birch syrup, rice syrup, cane syrup, chocolate syrup, coconut syrup, corn syrup, date syrup, fruit syrup, golden syrup, high fructose corn syrup, inverted sugar syrup, karo syrup, citrus fruit syrup, maple syrup, molasses, Muscavado syrup, palm ...

Well treatment comprising a polymer formed from a diallyl ammonium salt and a scale inhibitor

Patent Number: 8101554
Publication Date: 2012-01-24
Inventors: Chen, Ping; Montgomerie, Harry; Selle, Olav Martin; Hagen, Thomas; Wat, Rex

The present invention provides a method for increasing the retention of a scale inhibitor within a hydrocarbon producing system (e.g. a subterranean formation), said method comprising contacting said system with a polymer formed from a diallyl ammonium salt and with said scale inhibitor, wherein said polymer formed from a diallyl ammonium salt has a molecular weight of greater than 50,000 (e.g. a molecular weight of 55,000 to ...

Well drilling fluids having clay control properties

Patent Number: 8097567
Publication Date: 2012-01-17
Inventor: Wilson, Jr., Thomas P

Clay is stabilized in the drilling of wells and other formation treatment for hydrocarbon production by the addition to the drilling or other fluid including a choline compound together with an formation control ...

Methods of fracturing subterranean formations using sulfonated gelling agent polymers

Patent Number: 8097566
Publication Date: 2012-01-17
Inventors: Weaver, Jimmie D.; Slabaugh, Billy F.

Methods of forming one or more fractures in a subterranean formation penetrated by a well bore including the steps of providing a high ionic strength treating fluid that comprises water and one or more sulfonated gelling agent polymers wherein the high ionic strength treating fluid comprises one or more water soluble salts in a concentration of greater than about 8% by weight of the treating fluid, and introducing the treating fluid into the subterranean formation at a rate and pressure ...