Baker Hughes Corporation

Baker Hughes Holdings LLC

Baker Hughes, a Ge Compnay, LLC

Betzdearborn, Inc.

Scott Eric Lehrer

Sunder Ramachandran

Vladimir Jovancicevic

Soma Chakraborty

Samuel Asomaning

Kimchi T Phan

Lirio Quintero

Marc N Lehmann

William L Witzig

Saet B Debord

Nancy C Means

Rosanel Morales

A scavenger comprising a formaldehyde sulfoxylate may be used to scavenge hydrogen sulfide (HS) from systems that are brine or mixed production. Suitable formaldehyde sulfoxylates include, but are not necessarily limited to, sodium formaldehyde sulfoxylate, zinc formaldehyde sulfoxylate, and calcium formaldehyde sulfoxylate, potassium formaldehyde sulfoxylate, magnesium formaldehyde sulfoxylate, iron formaldehyde sulfoxylate, copper formaldehyde sulfoxylate, alkene aldehyde sulfoxylates, and combinations thereof.

Application of formaldehyde sulfoxylates for scavenging HS

A method of enhancing oil or gas production comprises injecting into a well penetrating a subterranean formation a pre-flush fluid to increase water wettability of the well, the subterranean formation, a flowline, or a combination comprising at least one of the foregoing; and injecting into the well a foamer composition.

Pre-flush for oil foamers

The use of a composition including a transition metal salt and at least one water-soluble aldehyde or water-soluble aldehyde precursor scavenges HS that is present in aqueous fluids (e.g. produced water liquid streams), natural gas and in oil and mixtures thereof (e.g. mixed production streams that contain all three phases) better than either component when used alone. The resulting scavenger combination significantly increases the reaction rate and the overall scavenging efficiency, i.e. capacity over the case where each component is used alone, in the same total amount. Non-limiting examples of the metal salt include zinc or iron carboxylates, and a non-limiting example of a water-soluble aldehyde or water-soluble aldehyde precursor is ethylene glycol hemiformal.

Synergistic H2S scavenger combination of transition metal salts with water-soluble aldehydes and aldehyde precursors

A transition metal carboxylate scavenger may be used to scavenge contaminants from systems from mixed production and/or gas, either dry or wet hydrocarbon gas. The contaminants scavenged or otherwise removed may include, but are not necessarily limited to, HS, mercaptans, sulfides, and combinations thereof. Suitable transition metal carboxylates in the scavenger include, but are not limited to, zinc octoate, zinc dodecanoate, zinc naphthenate, and combinations thereof.

Metal carboxylate salts as H2S scavengers in mixed production or dry gas or wet gas systems

The use of a composition that includes a metal salt and an oil soluble amine formaldehyde reaction product scavenges HS that is present in aqueous fluids (e.g. produced water liquid streams), natural gas and in oil and mixtures thereof (e.g. mixed production streams that contain all three phases) better than either component when used alone. The resulting scavenger combination significantly increases the reaction rate and the overall scavenging efficiency, i.e. capacity over each component when used alone, in the same total amount. Non-limiting examples of the metal salt include zinc or iron carboxylates, and a non-limiting example of an oil soluble amine formaldehyde reaction product is the reaction product of dibutylamine with formaldehyde.

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In a method for optimizing gas lift operations in the production of crude oil, a surfactant is injected into the an oil well such that the surface tension between a lift gas and the formation fluid being produced is reduced and/or a lift gas-formation fluid foam is formed. The reduction in surface tension and/or foam formation increases the efficiency of the lift gas for lifting the formation fluid to the surface. The surfactant is a silicone resin which may be combined with other surfactants, in some embodiments.

Method for recovering oil from an oil well

A drag reducing additive for heavy oil, such as crude oil, includes a polymeric alkyl-substituted phenol formaldehyde resin and a solvent having at least one of an ester (e.g. ethyl acetate), an aldehyde (e.g. butyraldehyde), and an aromatic hydrocarbon (e.g. toluene, xylene, and the like), or mixtures thereof. When used together with a diluent (e.g. condensate, naphtha, or the like), the additive may reduce viscosity of the combined oil, diluent, and additive by at least 20%, increase throughput by at least 6%, reduce power consumption by at least 3%, reduce the diluent proportion by at least 3%, or some combination of these effects, as compared with an otherwise identical heavy oil without the additive.

Additive to improve flow, reduce power consumption and pressure drop in heavy oil pipelines

A method for inhibiting hydrogen sulfite evolution from molten sulfur is disclosed. The method involves adding a hypohalide to molten sulfur containing hydrogen sulfite. The hypohalide, such as hypochlorite, hyprobromite, and their sodium or calcium salts inhibit the evolution of hydrogen sulfite from molten sulfur.

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The Woodlands, TX, United States of America

Scott Eric Lehrer