Schlumberger Technology Corporation

Ykk Corporation

Balakrishnan Panamarathupalayam

Changping Sui

Hui Joyce Zhang

William E Foxenberg

Paulo Pauferro, Jr

Linus Sebelin

Richard Toomes

Daniel Alvarez

Thomas Donovan Welton

Balkrishna Gadiyar

Emanuel Stamatakis

Steven Philip Young

Dimitri M Khramov

Sharath Chandra Mahavadi

Charles Svoboda

Alhad Phatak

Sashikumar Mettath

Lucas Mejia

Kristina Daeffler

Amr Essawi

A drilling fluid for drilling a subterranean wellbore includes water, salt, and a viscosifier comprising a first component comprising a reaction product of at least one acrylamide monomer and at least one sulfonated anionic monomer, and a second component comprising styrene-butadiene polymer. Related methods of operating a wellbore and drilling fluids are claimed.

Drilling fluids including a viscosifier, and related methods

Shale inhibitor additives, wellbore fluids comprising said additives, and methods using said fluids control hydration in wellbores disposed within swellable subterranean formations. The wellbore fluids contain aqueous base fluids, the shale inhibition additives, and natural biopolymeric viscosifiers, and optional encapsulating polymer agents, wherein the shale inhibition additives include amine-based shale inhibition agents. The methods circulate the wellbore fluids into the wellbores and/or maintain triamine-based shale inhibition agents of the wellbore fluids at concentrations of at least 50% by weight, based on total weights of the shale inhibition additives during multiple circulations of the wellbore fluids in the wellbores.

Shale inhibitor additives, wellbore fluids comprising said additives, and methods of using said fluids

A method of breaking a filtercake in a wellbore may include circulating a breaker fluid into the wellbore having a filtercake on the walls thereon, the filter cake including copolymer formed from at least one acrylamide monomer and at least one sulfonated anionic monomer, the breaker fluid comprising: a base fluid; a mixture of hydrolysable esters of dicarboxylic acids; and an organic peroxide oxidant.

Breaker fluids and methods of use thereof

Fluid loss control agents for use in a water-based wellbore fluid. The fluid loss control agents generally include non-crosslinked copolymers of non-carboxylated monomers. Water-based wellbore fluids containing the above fluid loss control agents and methods of servicing a wellbore in a subterranean formation by placing the water-based wellbore fluids in the wellbore.

Fluid loss control agent for aqueous wellbore fluids

A wellbore fluid includes a base fluid; and a crosslinked and branched polymeric fluid loss control agent formed from at least an acrylamide monomer and a sulfonated anionic monomer; wherein the fluid loss control agent has an extent of crosslinking that is selected so that the fluid loss control agent has a viscosity that is within a peak viscosity response of the viscosity response curve.

Crosslinked synthetic polymer-based reservoir drilling fluid

A coiled tubing wellbore fluid may include a base fluid; and a crosslinked and branched polymeric fluid loss control agent formed from at least an acrylamide monomer and a sulfonated anionic monomer; wherein the coiled tubing wellbore fluid has a low shear rate viscosity, measured at 120&#xb0; F. at 3 rpm, of at least 20,000 centipoise.

High-temperature fluids for coiled tubing applications and methods thereof

Compositions herein may include an oleaginous continuous phase, an aqueous discontinuous phase, a first clay comprising an organophilic smectite clay, and a second clay comprising a magnesium silicate clay. Methods herein may include circulating such fluids downhole as well as admixing a magnesium silicate dispersed clay and an organophilic smectite clay in an oleaginous base fluid.

Thermal stability of high temperature oil based system enhanced by organophilic clay

A brine viscosifier includes at least one monomer and triethoxyvinylsilane (TEVS) to provide crosslinking among the at least one monomer. A method includes admixing a composition comprising a brine, a thermal stabilizer, a pH buffer, and a polymer. The polymer may include a monomer, an organic crosslinker, an inorganic crosslinker; and an initiator.

Organic-inorganic hybrid polymer based fluids

Compositions herein may include an aqueous fluid, a crosslinked polyvinylpyrrolidone (PVP), and a betaine based polymer. Methods herein may include pumping a selected amount of a fluid loss pill into a formation, the fluid loss pill including a crosslinked PVP and a betaine based polymer.

Synthetic polymer based fluid loss pill

A insulating annular fluid for reducing convective currents in the annular region a wellbore is provided that includes an oleaginous fluid, a silica, and, in some embodiments, organoclay.

Insulating annular fluid

An insulating packer fluid including an oleaginous fluid and a styrenic thermoplastic block copolymer and methods of preparing the packer fluid are provided. Also provided are methods of using the insulating packer fluid that include pumping an insulating packer fluid into an annulus formed between two concentric strings of pipe extending into a wellbore.

High temperature viscosifier for insulating packer fluids

A method of electrically logging a section of a wellbore includes circulating a wellbore fluid within the wellbore, the wellbore fluid including a base fluid; and a crosslinked and branched polymeric fluid loss control agent formed from at least an acrylamide monomer and a sulfonated anionic monomer; wherein the fluid loss control agent has an extent of crosslinking that is selected so that the fluid loss control agent has a viscosity that is within a peak viscosity response of the viscosity response curve; placing within the wellbore a wellbore logging tool capable of applying an electrical current to the wellbore; applying electrical current from the logging tool; and collecting an electrical log of the portion of the wellbore that has had electrical current applied thereto.

Methods of logging

Insulating packer fluids containing colloidal silica inorganic additives may be used in methods that reduce convective currents in a packer fluid. In other aspects, packer fluids containing colloidal silica inorganic additives may be used in methods of insulating production wells and methods for stimulating production of hydrocarbons.

Growing community of inventors

Houston, TX, United States of America

Balakrishnan Panamarathupalayam