摘要:
Fluid treatment systems and compositions are provided including (a) at least one material including (1) at least one carboxylic acid functional group and (2) at least one sulfur-containing group selected from the group consisting of sulfonyl functional groups, sulfonate functional groups and mixtures thereof; and (b) at least one scale control agent. The fluid treatment systems and compositions can be used to treat aqueous systems, for example as fracturing fluids for treating aqueous compositions found in subterranean formations. Methods for inhibiting formation and/or precipitation of calcium salts in an aqueous composition using the fluid treatment systems or compositions also are provided.
摘要:
Methods of treating flowback water from a subterranean formation penetrated by a well bore are provided, comprising: (a) providing remediated flowback water having a ferrous iron (Fe+2) ion concentration of less than about 100 milligrams of ferrous iron ion per liter of flowback water, a barium ion (Ba+2) concentration of less than about 500 milligrams of barium ion per liter of flowback water, and a calcium ion (Ca+) concentration of at least about 1,000 milligrams of calcium ion per liter of remediated flowback water; and (b) treating the flowback water with: (i) at least one friction reducing agent; and (ii) at least one scale formation inhibiting agent and/or at least one iron precipitation control agent to provide treated flowback water which can be reused as fracturing fluid in a well drilling operation.
摘要:
A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a blend of lactic acid ester, such as ethyl lactate, and a fatty acid ester, such as methyl soyate. The fluid system may be further in the form of a microemulsion that is formed by combining a blend with one or more emulsifiers, an alcohol, and water. The fluid system may be used in displacement, well remediation and stimulation as well as additional, alternative applications such as the cleaning of surface and/or downhole equipment.
摘要:
Compositions and methods for treating systems, especially oil and/or gas wells, characterized by metal sulfide deposits are provided. Compositions according to the invention generally comprise a thioacid, an amine salt, and a diphosphonic acid. Methods according to the invention may comprise introducing such composition into a system characterized by metal sulfide deposits, or alternatively, introducing into the system individual quantities of the composition components.
摘要:
A method of preventing corrosion in pipelines comprising draining pipeline of all residual compounds, blowing through with nitrogen and rinsing with a corrosion inhibiting rinsing agent.
摘要:
A relatively nonvolatile, high molecular weight sulfur solvent produced by activating a dialkyl disulfide oil by the addition of a relatively high molecular weight predominantly aliphatic amine (e.g., a N-alkyl-1,3-propane diamine) and optionally further increasing the molecular weight by the addition of elemental sulfur. Such a sulfur solvent is particularly useful in sustaining a liquid phase at bottomhole conditions for high temperature, high pressure sour gas.
摘要:
A relatively nonvolatile, high molecular weight sulfur solvent produced by adding at least 40 parts by weight of elemental sulfur per 100 parts by weight dialkyl disulfide to an amine activated dialkyl disulfide oil. Such a sulfur solvent is particularly useful in sustaining a liquid phase at bottomhole conditions for high temperature, high pressure wells.
摘要:
NON-NEWTONIAN FORMULATIONS CONTAINING CARBON DISULFIDE (CS2) OF REDUCED TOXICITY AND FLAMMABILITY. THESE FORMULATIONS ARE ILLISTRATED BY HIGH INTERNAL PHASE RATIO (HIPR) EMULSIONS CONTAINING CARBON DISULFIDE IN THE INTERNAL PHASE, SAID INTERNAL PHASE CONTAINING MORE THAN ABOUT 60% OF THE FORMULATION BY VOLUME AND PREFERABLY MORE THAN ABOUT 80% OF THE FORMULATION BY VOLUME. THESE FORMULATIONS ARE PARTICULARLY USEFUL IN CLEANING OIL AND GAS WELLS BY THE REMOVAL OF WAX AND/OR SULFUR.
摘要:
THE AUTOGENOUS IGNITION TEMPERATURE OF CARBON DISULFIDE CAN BE ELEVATED ABOVE THAT OF PURE CARBON DISULFIDE BY INCORPORATING AN AMOUNT OF FROM ABOUT 0.1% TO ABOUT 10% BY WEIGHT, PREFERABLY BETWEEN ABOUT 0.2% AND 5%, OF AN ADDITIVE SELECTED FROM THE CLASS CONSISTING OF DIMETHYL SULFOXIDE AND ORGANIC SULFIDES AND DISULFIDES HAVING THE FORMULAE RSR'' AND RSSR'', RESPECTIELY, WHEREIN R AND R'' ARE ALKYL OR ALKENYL RADICALS EACH CONTAINING UP TO ABOUT 5 CARBON ATOMS, INCLUSIVE.