Abrégé

The present disclosure provides methods and lubricant blends for increasing lubricity of a brine-based drilling fluid having an alkaline pH and a threshold divalent cation concentration. An embodiment of the methods herein comprise providing a produced water or a brine having a threshold divalent cation concentration and an alkaline pH; adding to the produced water or brine at least one source of free fatty acids; and optionally further adding a dispersant. Also provided are brine-based drilling fluids produced by the methods and lubricant blends disclosed herein. Also, provided are methods for improving lubricity in a wellbore during drilling operations, which comprise, combining in a modulated manner, a quantity of a produced water or brine and a quantity of a lubricant blend comprising at least one source of free fatty acids and a dispersant, to target formation of a semi-solid lubricant that adheres to downhole surfaces.

Classes IPC  ?

• C09K 8/08 - Compositions ne contenant pas d'argile contenant des composés organiques naturels, p. ex. des polysaccharides, ou leurs dérivés

Abrégé

The present disclosure generally relates to compositions containing percitric acid, treatment fluids containing such compositions and methods of using the treatment fluids during various oil- and gas-field operations including hydraulic fracturing, remediation, production, disposal well chemistry and cleaning equipment both above surface and downhole used in connection with oil- and gas-field operations.

Classes IPC  ?

• E21B 37/06 - Procédés ou appareils pour nettoyer les trous de forage ou les puits utilisant des moyens chimiques pour empêcher ou limiter le dépôt de paraffine ou de substances analogues
• C09K 8/528 - Compositions pour éviter, limiter ou éliminer les dépôts, p. ex. pour le nettoyage les dépôts inorganiques, p. ex. sulfates ou carbonates

Abrégé

The present disclosure provides methods and lubricant blends for increasing lubricity of a brine-based drilling fluid having an alkaline pH and a threshold divalent cation concentration. An embodiment of the methods herein comprise providing a produced water or a brine having a threshold divalent cation concentration and an alkaline pH; adding to the produced water or brine at least one source of free fatty acids; and optionally further adding a dispersant. Also provided are brine-based drilling fluids produced by the methods and lubricant blends disclosed herein. Also, provided are methods for improving lubricity in a wellbore during drilling operations, which comprise, combining in a modulated manner, a quantity of a produced water or brine and a quantity of a lubricant blend comprising at least one source of free fatty acids and a dispersant, to target formation of a semi-solid lubricant that adheres to downhole surfaces.

Classes IPC  ?

• C09K 8/08 - Compositions ne contenant pas d'argile contenant des composés organiques naturels, p. ex. des polysaccharides, ou leurs dérivés

Produits et services

Chemical additives and additive blends for lubricating drilling fluids; chemical additives and additive blends for improving lubricity of brine-based drilling fluids Industrial lubricants; drilling lubricants

Produits et services

(1) Chemical additives and additive blends for lubricating drilling fluids; chemical additives and additive blends for improving lubricity of brine-based drilling fluids (2) Industrial lubricants; drilling lubricants

Abrégé

Some embodiments of the present disclosure relate to drilling fluids that comprise an aqueous solvent and an ampholytic semi-hydrophobic polymer that is readily hydratable under field mixing conditions. The ampholytic semi-hydrophobic polymer comprises semi-hydrophobic monomer units comprising a C1-C7 hydrocarbyl substituent, a hydrogen substituent, or a combination thereof. Some embodiments of the present disclosure relate to use of a drilling fluid as defined herein to reduce bitumen accretion to a wellbore drilling component. Some embodiments of the present disclosure relate to methods for reducing bitumen accretion to a wellbore drilling component, the method comprising introducing a drilling fluid as defined herein into a wellbore containing the wellbore drilling component.

Classes IPC  ?

• C09K 8/12 - Compositions ne contenant pas d'argile contenant des composés organiques synthétiques macromoléculaires ou leurs précurseurs
• C08F 220/56 - AcrylamideMéthacrylamide
• E21B 37/06 - Procédés ou appareils pour nettoyer les trous de forage ou les puits utilisant des moyens chimiques pour empêcher ou limiter le dépôt de paraffine ou de substances analogues

Produits et services

(1) The mining, acquisition, movement, processing, beneficiation and packaging of mineral ores

Produits et services

(1) Oil based drilling mud lubricant

Produits et services

(1) Barium sulfate and barite, for use in drilling mud.